[Title 46 CFR ]
[Code of Federal Regulations (annual edition) - October 1, 1996 Edition]
[From the U.S. Government Printing Office]


          46



          Shipping



[[Page i]]

          PARTS 41 TO 69

          Revised as of October 1, 1996
          CONTAINING
          A CODIFICATION OF DOCUMENTS
          OF GENERAL APPLICABILITY
          AND FUTURE EFFECT

          AS OF OCTOBER 1, 1996
          With Ancillaries
          Published by
          the Office of the Federal Register
          National Archives and Records
          Administration

          as a Special Edition of
          the Federal Register



[[Page ii]]

                                      




                     U.S. GOVERNMENT PRINTING OFFICE
                            WASHINGTON : 1996



               For sale by U.S. Government Printing Office
 Superintendent of Documents, Mail Stop: SSOP, Washington, DC 20402-9328



[[Page iii]]




                            Table of Contents


                                                                    Page
  Explanation.................................................       v
  Title 46:
    Chapter I--Coast Guard, Department of Transportation--
        Continued:............................................       3
  Finding Aids:
    Material Approved for Incorporation by Reference..........     411
    Table of CFR Titles and Chapters..........................     419
    Alphabetical List of Agencies Appearing in the CFR........     435
    List of CFR Sections Affected.............................     445

[[Page iv]]



      



                                                                                                                
                                  ----------------------------------------------------------                    
                                   Cite this Code:  CFR                                                         
                                                                                                                
                                   To cite the regulations in this volume use title, part                       
                                    and section number. Thus, 46 CFR 42.01-1 refers to                          
                                    title 46, part 42, section 01-1.                                            
                                                                                                                
                                  ----------------------------------------------------------                    
                                                                                                                


[[Page v]]

                               EXPLANATION

    The Code of Federal Regulations is a codification of the general and 
permanent rules published in the Federal Register by the Executive 
departments and agencies of the Federal Government. The Code is divided 
into 50 titles which represent broad areas subject to Federal 
regulation. Each title is divided into chapters which usually bear the 
name of the issuing agency. Each chapter is further subdivided into 
parts covering specific regulatory areas.
    Each volume of the Code is revised at least once each calendar year 
and issued on a quarterly basis approximately as follows:

Title 1 through Title 16.................................as of January 1
Title 17 through Title 27..................................as of April 1
Title 28 through Title 41...................................as of July 1
Title 42 through Title 50................................as of October 1
    The appropriate revision date is printed on the cover of each 
volume.

LEGAL STATUS

    The contents of the Federal Register are required to be judicially 
noticed (44 U.S.C. 1507). The Code of Federal Regulations is prima facie 
evidence of the text of the original documents (44 U.S.C. 1510).

HOW TO USE THE CODE OF FEDERAL REGULATIONS

    The Code of Federal Regulations is kept up to date by the individual 
issues of the Federal Register. These two publications must be used 
together to determine the latest version of any given rule.
    To determine whether a Code volume has been amended since its 
revision date (in this case, October 1, 1996), consult the ``List of CFR 
Sections Affected (LSA),'' which is issued monthly, and the ``Cumulative 
List of Parts Affected,'' which appears in the Reader Aids section of 
the daily Federal Register. These two lists will identify the Federal 
Register page number of the latest amendment of any given rule.

EFFECTIVE AND EXPIRATION DATES

    Each volume of the Code contains amendments published in the Federal 
Register since the last revision of that volume of the Code. Source 
citations for the regulations are referred to by volume number and page 
number of the Federal Register and date of publication. Publication 
dates and effective dates are usually not the same and care must be 
exercised by the user in determining the actual effective date. In 
instances where the effective date is beyond the cut-off date for the 
Code a note has been inserted to reflect the future effective date. In 
those instances where a regulation published in the Federal Register 
states a date certain for expiration, an appropriate note will be 
inserted following the text.

OMB CONTROL NUMBERS

    The Paperwork Reduction Act of 1980 (Pub. L. 96-511) requires 
Federal agencies to display an OMB control number with their information 
collection request.

[[Page vi]]

Many agencies have begun publishing numerous OMB control numbers as 
amendments to existing regulations in the CFR. These OMB numbers are 
placed as close as possible to the applicable recordkeeping or reporting 
requirements.

OBSOLETE PROVISIONS

    Provisions that become obsolete before the revision date stated on 
the cover of each volume are not carried. Code users may find the text 
of provisions in effect on a given date in the past by using the 
appropriate numerical list of sections affected. For the period before 
January 1, 1986, consult either the List of CFR Sections Affected, 1949-
1963, 1964-1972, or 1973-1985, published in seven separate volumes. For 
the period beginning January 1, 1986, a ``List of CFR Sections 
Affected'' is published at the end of each CFR volume.

INCORPORATION BY REFERENCE

    What is incorporation by reference? Incorporation by reference was 
established by statute and allows Federal agencies to meet the 
requirement to publish regulations in the Federal Register by referring 
to materials already published elsewhere. For an incorporation to be 
valid, the Director of the Federal Register must approve it. The legal 
effect of incorporation by reference is that the material is treated as 
if it were published in full in the Federal Register (5 U.S.C. 552(a)). 
This material, like any other properly issued regulation, has the force 
of law.
    What is a proper incorporation by reference? The Director of the 
Federal Register will approve an incorporation by reference only when 
the requirements of 1 CFR part 51 are met. Some of the elements on which 
approval is based are:
    (a) The incorporation will substantially reduce the volume of 
material published in the Federal Register.
    (b) The matter incorporated is in fact available to the extent 
necessary to afford fairness and uniformity in the administrative 
process.
    (c) The incorporating document is drafted and submitted for 
publication in accordance with 1 CFR part 51.
    Properly approved incorporations by reference in this volume are 
listed in the Finding Aids at the end of this volume.
    What if the material incorporated by reference cannot be found? If 
you have any problem locating or obtaining a copy of material listed in 
the Finding Aids of this volume as an approved incorporation by 
reference, please contact the agency that issued the regulation 
containing that incorporation. If, after contacting the agency, you find 
the material is not available, please notify the Director of the Federal 
Register, National Archives and Records Administration, Washington DC 
20408, or call (202) 523-4534.

CFR INDEXES AND TABULAR GUIDES

    A subject index to the Code of Federal Regulations is contained in a 
separate volume, revised annually as of January 1, entitled CFR Index 
and Finding Aids. This volume contains the Parallel Table of Statutory 
Authorities and Agency Rules (Table I), and Acts Requiring Publication 
in the Federal Register (Table II). A list of CFR titles, chapters, and 
parts and an alphabetical list of agencies publishing in the CFR are 
also included in this volume.
    An index to the text of ``Title 3--The President'' is carried within 
that volume.
    The Federal Register Index is issued monthly in cumulative form. 
This index is based on a consolidation of the ``Contents'' entries in 
the daily Federal Register.

[[Page vii]]

    A List of CFR Sections Affected (LSA) is published monthly, keyed to 
the revision dates of the 50 CFR titles.

REPUBLICATION OF MATERIAL

    There are no restrictions on the republication of material appearing 
in the Code of Federal Regulations.

INQUIRIES

    For a legal interpretation or explanation of any regulation in this 
volume, contact the issuing agency. The issuing agency's name appears at 
the top of odd-numbered pages.
    For inquiries concerning CFR reference assistance, call 202-523-5227 
or write to the Director, Office of the Federal Register, National 
Archives and Records Administration, Washington, DC 20408.
SALES

    The Government Printing Office (GPO) processes all sales and 
distribution of the CFR. For payment by credit card, call 202-512-1800, 
M-F, 8 a.m. to 4 p.m. e.s.t. or fax your order to 202-512-2233, 24 hours 
a day. For payment by check, write to the Superintendent of Documents, 
Attn: New Orders, P.O. Box 371954, Pittsburgh, PA 15250-7954. For GPO 
Customer Service call 202-512-1803.

                              Richard L. Claypoole,
                                    Director,
                          Office of the Federal Register.

October 1, 1996.



[[Page ix]]



                               THIS TITLE

    Title 46--Shipping is composed of nine volumes. The parts in these 
volumes are arranged in the following order: Parts 1-40, 41-69, 70-89, 
90-139, 140-155, 156-165, 166-199, 200-499 and 500 to End. The first 
seven volumes containing parts 1-199 comprise chapter I--Coast Guard, 
Department of Transportation. The eighth volume containing parts 200 to 
499 includes chapter II--Maritime Administration, DOT. The ninth volume 
containing part 500 to End includes chapter IV--Federal Maritime 
Commission. The contents of these volumes represent all current 
regulations codified under this title of the CFR as of October 1, 1996.

    Subject indexes appear for subchapter B--Merchant Marine Officers 
and Seamen, subchapter C--Uninspected Vessels, and subchapter D--Tank 
Vessels following the subchapters in parts 1-40; for subchapter F--
Marine Engineering following the subchapter in parts 41-69; for 
subchapter H--Passenger Vessels following the subchapter in parts 70-89; 
for subchapter I--Cargo and Miscellaneous Vessels, subchapter I-A-Mobile 
Offshore Drilling Units, and subchapter J--Electrical Engineering; for 
subchapter K--Small Passenger Vessels Carrying more than 150 Passengers 
or with Overnight Accommodations for more than 49 Passengers, for 
subchapter L--Offshore Supply Vessels following the subchapters in parts 
90-139; for subchapter S--Subdivision and Stability, for subchapter T--
Small Passenger Vessels (Under 100 Gross Tons) and for subchapter W--
Lifesaving Appliances and Arrangements following the subchapters in 
parts 166-199.

    For this volume Elizabeth N. Thomas was Chief Editor. The Code of 
Federal Regulations publication program is under the direction of 
Frances D. McDonald, assisted by Alomha S. Morris.

[[Page x]]



 
          46



          Shipping



[[Page 1]]

          PARTS 41 TO 69

          Revised as of October 1, 1996
          CONTAINING
          A CODIFICATION OF DOCUMENTS
          OF GENERAL APPLICABILITY
          AND FUTURE EFFECT

          AS OF OCTOBER 1, 1996
          With Ancillaries
          Published by
          the Office of the Federal Register
          National Archives and Records
          Administration

          as a Special Edition of
          the Federal Register



[[Page ii]]

                                      




                     U.S. GOVERNMENT PRINTING OFFICE
                            WASHINGTON : 1996



               For sale by U.S. Government Printing Office
 Superintendent of Documents, Mail Stop: SSOP, Washington, DC 20402-9328



[[Page iii]]




                            Table of Contents


                                                                    Page
  Explanation.................................................       v
  Title 46:
    Chapter I--Coast Guard, Department of Transportation--
        Continued:............................................       3
  Finding Aids:
    Material Approved for Incorporation by Reference..........     411
    Table of CFR Titles and Chapters..........................     419
    Alphabetical List of Agencies Appearing in the CFR........     435
    List of CFR Sections Affected.............................     445

[[Page iv]]



      



                                                                                                                
                                  ----------------------------------------------------------                    
                                   Cite this Code:  CFR                                                         
                                                                                                                
                                   To cite the regulations in this volume use title, part                       
                                    and section number. Thus, 46 CFR 42.01-1 refers to                          
                                    title 46, part 42, section 01-1.                                            
                                                                                                                
                                  ----------------------------------------------------------                    
                                                                                                                


[[Page v]]

                               EXPLANATION

    The Code of Federal Regulations is a codification of the general and 
permanent rules published in the Federal Register by the Executive 
departments and agencies of the Federal Government. The Code is divided 
into 50 titles which represent broad areas subject to Federal 
regulation. Each title is divided into chapters which usually bear the 
name of the issuing agency. Each chapter is further subdivided into 
parts covering specific regulatory areas.
    Each volume of the Code is revised at least once each calendar year 
and issued on a quarterly basis approximately as follows:

Title 1 through Title 16.................................as of January 1
Title 17 through Title 27..................................as of April 1
Title 28 through Title 41...................................as of July 1
Title 42 through Title 50................................as of October 1
    The appropriate revision date is printed on the cover of each 
volume.

LEGAL STATUS

    The contents of the Federal Register are required to be judicially 
noticed (44 U.S.C. 1507). The Code of Federal Regulations is prima facie 
evidence of the text of the original documents (44 U.S.C. 1510).

HOW TO USE THE CODE OF FEDERAL REGULATIONS

    The Code of Federal Regulations is kept up to date by the individual 
issues of the Federal Register. These two publications must be used 
together to determine the latest version of any given rule.
    To determine whether a Code volume has been amended since its 
revision date (in this case, October 1, 1996), consult the ``List of CFR 
Sections Affected (LSA),'' which is issued monthly, and the ``Cumulative 
List of Parts Affected,'' which appears in the Reader Aids section of 
the daily Federal Register. These two lists will identify the Federal 
Register page number of the latest amendment of any given rule.

EFFECTIVE AND EXPIRATION DATES

    Each volume of the Code contains amendments published in the Federal 
Register since the last revision of that volume of the Code. Source 
citations for the regulations are referred to by volume number and page 
number of the Federal Register and date of publication. Publication 
dates and effective dates are usually not the same and care must be 
exercised by the user in determining the actual effective date. In 
instances where the effective date is beyond the cut-off date for the 
Code a note has been inserted to reflect the future effective date. In 
those instances where a regulation published in the Federal Register 
states a date certain for expiration, an appropriate note will be 
inserted following the text.

OMB CONTROL NUMBERS

    The Paperwork Reduction Act of 1980 (Pub. L. 96-511) requires 
Federal agencies to display an OMB control number with their information 
collection request.

[[Page vi]]

Many agencies have begun publishing numerous OMB control numbers as 
amendments to existing regulations in the CFR. These OMB numbers are 
placed as close as possible to the applicable recordkeeping or reporting 
requirements.

OBSOLETE PROVISIONS

    Provisions that become obsolete before the revision date stated on 
the cover of each volume are not carried. Code users may find the text 
of provisions in effect on a given date in the past by using the 
appropriate numerical list of sections affected. For the period before 
January 1, 1986, consult either the List of CFR Sections Affected, 1949-
1963, 1964-1972, or 1973-1985, published in seven separate volumes. For 
the period beginning January 1, 1986, a ``List of CFR Sections 
Affected'' is published at the end of each CFR volume.

INCORPORATION BY REFERENCE

    What is incorporation by reference? Incorporation by reference was 
established by statute and allows Federal agencies to meet the 
requirement to publish regulations in the Federal Register by referring 
to materials already published elsewhere. For an incorporation to be 
valid, the Director of the Federal Register must approve it. The legal 
effect of incorporation by reference is that the material is treated as 
if it were published in full in the Federal Register (5 U.S.C. 552(a)). 
This material, like any other properly issued regulation, has the force 
of law.
    What is a proper incorporation by reference? The Director of the 
Federal Register will approve an incorporation by reference only when 
the requirements of 1 CFR part 51 are met. Some of the elements on which 
approval is based are:
    (a) The incorporation will substantially reduce the volume of 
material published in the Federal Register.
    (b) The matter incorporated is in fact available to the extent 
necessary to afford fairness and uniformity in the administrative 
process.
    (c) The incorporating document is drafted and submitted for 
publication in accordance with 1 CFR part 51.
    Properly approved incorporations by reference in this volume are 
listed in the Finding Aids at the end of this volume.
    What if the material incorporated by reference cannot be found? If 
you have any problem locating or obtaining a copy of material listed in 
the Finding Aids of this volume as an approved incorporation by 
reference, please contact the agency that issued the regulation 
containing that incorporation. If, after contacting the agency, you find 
the material is not available, please notify the Director of the Federal 
Register, National Archives and Records Administration, Washington DC 
20408, or call (202) 523-4534.

CFR INDEXES AND TABULAR GUIDES

    A subject index to the Code of Federal Regulations is contained in a 
separate volume, revised annually as of January 1, entitled CFR Index 
and Finding Aids. This volume contains the Parallel Table of Statutory 
Authorities and Agency Rules (Table I), and Acts Requiring Publication 
in the Federal Register (Table II). A list of CFR titles, chapters, and 
parts and an alphabetical list of agencies publishing in the CFR are 
also included in this volume.
    An index to the text of ``Title 3--The President'' is carried within 
that volume.
    The Federal Register Index is issued monthly in cumulative form. 
This index is based on a consolidation of the ``Contents'' entries in 
the daily Federal Register.

[[Page vii]]

    A List of CFR Sections Affected (LSA) is published monthly, keyed to 
the revision dates of the 50 CFR titles.

REPUBLICATION OF MATERIAL

    There are no restrictions on the republication of material appearing 
in the Code of Federal Regulations.

INQUIRIES

    For a legal interpretation or explanation of any regulation in this 
volume, contact the issuing agency. The issuing agency's name appears at 
the top of odd-numbered pages.
    For inquiries concerning CFR reference assistance, call 202-523-5227 
or write to the Director, Office of the Federal Register, National 
Archives and Records Administration, Washington, DC 20408.
SALES

    The Government Printing Office (GPO) processes all sales and 
distribution of the CFR. For payment by credit card, call 202-512-1800, 
M-F, 8 a.m. to 4 p.m. e.s.t. or fax your order to 202-512-2233, 24 hours 
a day. For payment by check, write to the Superintendent of Documents, 
Attn: New Orders, P.O. Box 371954, Pittsburgh, PA 15250-7954. For GPO 
Customer Service call 202-512-1803.

                              Richard L. Claypoole,
                                    Director,
                          Office of the Federal Register.

October 1, 1996.



[[Page ix]]



                               THIS TITLE

    Title 46--Shipping is composed of nine volumes. The parts in these 
volumes are arranged in the following order: Parts 1-40, 41-69, 70-89, 
90-139, 140-155, 156-165, 166-199, 200-499 and 500 to End. The first 
seven volumes containing parts 1-199 comprise chapter I--Coast Guard, 
Department of Transportation. The eighth volume containing parts 200 to 
499 includes chapter II--Maritime Administration, DOT. The ninth volume 
containing part 500 to End includes chapter IV--Federal Maritime 
Commission. The contents of these volumes represent all current 
regulations codified under this title of the CFR as of October 1, 1996.

    Subject indexes appear for subchapter B--Merchant Marine Officers 
and Seamen, subchapter C--Uninspected Vessels, and subchapter D--Tank 
Vessels following the subchapters in parts 1-40; for subchapter F--
Marine Engineering following the subchapter in parts 41-69; for 
subchapter H--Passenger Vessels following the subchapter in parts 70-89; 
for subchapter I--Cargo and Miscellaneous Vessels, subchapter I-A-Mobile 
Offshore Drilling Units, and subchapter J--Electrical Engineering; for 
subchapter K--Small Passenger Vessels Carrying more than 150 Passengers 
or with Overnight Accommodations for more than 49 Passengers, for 
subchapter L--Offshore Supply Vessels following the subchapters in parts 
90-139; for subchapter S--Subdivision and Stability, for subchapter T--
Small Passenger Vessels (Under 100 Gross Tons) and for subchapter W--
Lifesaving Appliances and Arrangements following the subchapters in 
parts 166-199.

    For this volume Elizabeth N. Thomas was Chief Editor. The Code of 
Federal Regulations publication program is under the direction of 
Frances D. McDonald, assisted by Alomha S. Morris.

[[Page x]]





[[Page 1]]



                           TITLE 46--SHIPPING




                   (This book contains parts 41 to 69)

  --------------------------------------------------------------------
                                                                    Part
chapter i--Coast Guard, Department of Transportation--
  Continued:................................................          42

[[Page 3]]



     CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION--CONTINUED




  --------------------------------------------------------------------

                        SUBCHAPTER E--LOAD LINES
Part                                                                Page
41        [Reserved]
42              Domestic and foreign voyages by sea.........           5
43        [Reserved]
44              Special service limited domestic voyages....          63
45              Great Lakes load lines......................          70
46              Subdivision load lines for passenger vessels          86
47              Combination load lines......................          92
                    SUBCHAPTER F--MARINE ENGINEERING

50              General provisions..........................          96
51        [Reserved]
52              Power boilers...............................         105
53              Heating boilers.............................         123
54              Pressure vessels............................         126
56              Piping systems and appurtenances............         157
57              Welding and brazing.........................         230
58              Main and auxiliary machinery and related 
                    systems.................................         244
59              Repairs to boilers, pressure vessels and 
                    appurtenances...........................         271
60        [Reserved]
61              Periodic tests and inspections..............         277
62              Vital system automation.....................         286
63              Automatic auxiliary boilers.................         301
64              Marine portable tanks and cargo handling 
                    systems.................................         306

                Index.......................................         315
         SUBCHAPTER G--DOCUMENTATION AND MEASUREMENT OF VESSELS
66        [Reserved]
67              Documentation of vessels....................         328
68              Documentation of vessels pursuant to 
                    extraordinary legislative grants........         362
69              Measurement of vessels......................         369

[[Page 5]]



                        SUBCHAPTER E--LOAD LINES





PART 41--[RESERVED]






PART 42--DOMESTIC AND FOREIGN VOYAGES BY SEA--Table of Contents




                  Subpart 42.01--Authority and Purpose

Sec.
42.01-1  Authority for regulations.
42.01-5  OMB control numbers assigned pursuant to the Paperwork 
          Reduction Act.
42.01-10  Purpose of regulations.

                       Subpart 42.03--Application

42.03-5  U.S.-flag vessels subject to the requirements of this 
          subchapter.
42.03-10  Foreign vessels subject to this subchapter.
42.03-15  The Great Lakes of North America.
42.03-17  Special load line marks for vessels carrying timber deck 
          cargo.
42.03-20  Equivalents.
42.03-25  Experimental installations.
42.03-30  Exemptions for vessels.
42.03-35  U.S.-flag vessels and Canadian vessels navigating on sheltered 
          waters of Puget Sound and contiguous west coast waters of 
          United States and Canada.

       Subpart 42.05--Definition of Terms Used in This Subchapter

42.05-1  Approved.
42.05-10  Assigning authority.
42.05-20  Commandant.
42.05-25  Coast Guard District Commander or District Commander.
42.05-30  Existing vessel.
42.05-40  Great Lakes.
42.05-45  International voyage.
42.05-47  Marine inspector or inspector.
42.05-50  New vessel.
42.05-55  Officer in Charge, Marine Inspection.
42.05-60  Recognized classification society.
42.05-63  Ship(s) and vessel(s).
42.05-65  Surveyor.

        Subpart 42.07--Control, Enforcement, and Rights of Appeal

42.07-1  Load lines required.
42.07-5  Marks placed on vessel to indicate load lines.
42.07-10  Submergence of load line marks.
42.07-15  Zones and seasonal areas.
42.07-20  Logbook entries.
42.07-25  Approval of the Commandant.
42.07-30  Approval of the assigning authority.
42.07-35  American Bureau of Shipping as an assigning authority.
42.07-40  Recognized classification society as an assigning authority.
42.07-43  Change in assigning authority.
42.07-45  Load line certificates.
42.07-50  Penalties for violations.
42.07-55  Cancellation of load line certificates or exemption 
          certificates.
42.07-60  Control.
42.07-75  Right of appeal.

 Subpart 42.09--Load Line Assignments and Surveys--General Requirements

42.09-1  Assignment of load lines.
42.09-5  All vessels--division into types.
42.09-10  Stability, subdivision, and strength.
42.09-15  Surveys by the American Bureau of Shipping or assigning 
          authority.
42.09-20  Surveys of foreign vessels.
42.09-25  Initial or periodic survey requirements for all vessels.
42.09-30  Additional survey requirements for steel-hull vessels.
42.09-35  Additional survey requirements for wood-hull vessels.
42.09-40  Annual surveys.
42.09-45  Correction of deficiencies.
42.09-50  Repairs or alterations to vessel after it has been surveyed.

  Subpart 42.11--Applications for Load Line Assignments, Surveys, and 
                              Certificates

42.11-1  General.
42.11-5  Applications for load line assignments, surveys, and 
          certificates for U.S.-flag vessels.
42.11-10  Applications for load line assignments and certificates for 
          vessels other than U.S.-flag vessels.
42.11-15  Application for timber load lines.
42.11-20  Application for annual survey.

         Subpart 42.13--General Rules for Determining Load Lines

42.13-1  Assumptions.
42.13-5  Strength of vessel.
42.13-10  Freeboards assigned vessels.
42.13-15  Definitions of terms.
42.13-20  Deck line.
42.13-25  Load line mark.
42.13-30  Lines to be used with the load line mark.
42.13-35  Mark of assigning authority.
42.13-40  Details of marking.
42.13-45  Verification of marks.

[[Page 6]]

          Subpart 42.15--Conditions of Assignment of Freeboard

42.15-1  Information to be supplied to the master.
42.15-5  Superstructure end bulkheads.
42.15-10  Doors.
42.15-15  Positions of hatchways, doorways and ventilators.
42.15-20  Cargo and other hatchways.
42.15-25  Hatchways closed by portable covers and secured weathertight 
          by tarpaulins and battening devices.
42.15-30  Hatchways closed by weathertight covers of steel or other 
          equivalent material fitted with gaskets and clamping devices.
42.15-35  Machinery space openings.
42.15-40  Miscellaneous openings in freeboard and superstructure decks.
42.15-45  Ventilators.
42.15-50  Air pipes.
42.15-55  Cargo ports and other similar openings.
42.15-60  Scuppers, inlets, and discharges.
42.15-65  Side scuttles.
42.15-70  Freeing ports.
42.15-75  Protection of the crew.
42.15-80  Special conditions of assignment for Type ``A'' vessels.

                        Subpart 42.20--Freeboards

42.20-3  Freeboard assignment: Type ``A'' vessels.
42.20-5  Freeboard assignment: Type ``B'' vessels.
42.20-6  Flooding standard: Type ``A'' vessels.
42.20-7  Flooding standard: Type ``B'' vessel, 60 percent reduction.
42.20-8  Flooding standard: Type ``B'' vessel, 100 percent reduction.
42.20-9  Initial conditions of loading.
42.20-10  Free surface.
42.20-11  Extent of damage.
42.20-12  Conditions of equilibrium.
42.20-13  Vessels without means of propulsion.
42.20-15  Freeboard tables.
42.20-20  Correction to the freeboard for vessels under 328 feet in 
          length.
42.20-25  Correction for block coefficient.
42.20-30  Correction for depth.
42.20-35  Correction for position of deck line.
42.20-40  Standard height of superstructure.
42.20-45  Length of superstructure.
42.20-50  Effective length of superstructure.
42.20-55  Trunks.
42.20-60  Deduction for superstructures and trunks.
42.20-65  Sheer.
42.20-70  Minimum bow height.
42.20-75  Minimum freeboards.

    Subpart 42.25--Special Requirements for Vessels Assigned Timber 
                               Freeboards

42.25-1  Application of this subpart.
42.25-5  Definitions of terms used in this subpart.
42.25-10  Construction of vessel.
42.25-15  Stowage.
42.25-20  Computation for freeboard.

            Subpart 42.30--Zones, Areas, and Seasonal Periods

42.30-1  Basis.
42.30-5  Northern Winter Seasonal Zones and area.
42.30-10  Southern Winter Seasonal Zone.
42.30-15  Tropical Zone.
42.30-20  Seasonal Tropical Areas.
42.30-25  Summer Zones.
42.30-30  Enclosed seas.
42.30-35  The Winter North Atlantic Load Line.

           Subpart 42.50--Load Line Certificates--Model Forms

42.50-1  General.
42.50-5  International load line certificates.
42.50-10  Load line certificates for nonadherent foreign flag vessels.
42.50-15  Coastwise load line certificates for U.S.-flag vessels.

    Authority: 46 U.S.C. 5115; 49 CFR 1.45, 1.46; section 42.01-5 also 
issued under the authority of 44 U.S.C. 3507.



                  Subpart 42.01--Authority and Purpose



Sec. 42.01-1  Authority for regulations.

    The statutory authority to prescribe rules and regulations requiring 
certain vessels to have and display load line marks indicating the 
maximum amidship draft to which such vessels may be safely loaded and 
certification thereof by the assigning authority is in the International 
Voyage Load Line Act of 1973, as amended (46 U.S.C. 86-86i), and 
Coastwise Load Line Act of 1935, as amended (46 U.S.C. 88-88i).

[CGD 80-120, 47 FR 5721, Feb. 8, 1982]



Sec. 42.01-5   OMB control numbers assigned pursuant to the Paperwork Reduction Act.

    (a) Purpose. This section collects and displays the control numbers 
assigned to information collection and recordkeeping requirements in 
this subchapter by the Office of Management

[[Page 7]]

and Budget (OMB) pursuant to the Paperwork Reduction Act of 1980 (44 
U.S.C. 3501 et seq.). The Coast Guard intends that this section comply 
with the requirements of 44 U.S.C. 3507(f) which requires that agencies 
display a current control number assigned by the Director of the OMB for 
each approved agency information collection requirement.
    (b) Display.

------------------------------------------------------------------------
                                                                Current 
                                                                  OMB   
    46 CFR part or section where identified or described        control 
                                                                  No.   
------------------------------------------------------------------------
Part 42.....................................................   2115-0043
Part 44.....................................................   2115-0043
Part 45.....................................................   2115-0043
Part 46.....................................................   2115-0043
------------------------------------------------------------------------


[49 FR 38120, Sept. 27, 1984]



Sec. 42.01-10   Purpose of regulations.

    (a) The load line marks when placed on a vessel shall indicate the 
maximum amidships draft to which such vessel can be lawfully submerged, 
in the various circumstances and seasons applicable to such vessel.
    (b) This subchapter sets forth the uniform minimum requirements for 
load line marks on various categories of vessels. It also sets forth 
requirements for surveys relating to the assignment of load lines, the 
issuing of load line certificates by authorized issuing authorities, and 
the carriage of load line certificates aboard vessels.
    (c) The rules and regulations in this subchapter also provide for 
the enforcement of load line requirements and control over vessels when 
it is believed such vessels may be in violation of applicable load line 
requirements.

[CGFR 68-60, 33 FR 10049, July 12, 1968, as amended by CGD 80-120, 47 FR 
5721, Feb. 8, 1982]



                       Subpart 42.03--Application



Sec. 42.03-5   U.S.-flag vessels subject to the requirements of this subchapter.

    (a) Vessels engaged in foreign voyages or international voyages 
other than solely Great Lakes voyages. (1) All U.S. flag vessels which 
engage in foreign voyages or international voyages by sea (other than 
solely in Great Lakes voyages) are subject to this part; except the 
following:
    (i) Ships of war;
    (ii) New vessels of less than 79 feet in length;
    (iii) Existing vessels of less than 150 gross tons;
    (iv) Pleasure yachts not engaged in trade; and
    (v) Fishing vessels.
    (2) As provided in Article 4(4) of the 1966 Convention, in order for 
existing vessels to take advantage of any reduction in freeboards from 
those previously assigned, the regulations in Subparts 42.13 to 42.25, 
inclusive, of this part shall be fully complied with. Except for due 
cause, such vessels shall not be required to increase their freeboards 
under the provisions of the 1966 Convention.
    (3) All U.S.-flag vessels authorized to engage in foreign or 
international voyages may also engage in domestic voyages by sea and, as 
permitted by Sec. 45.9 of this part and Part 47 of this subchapter, in 
Great Lakes voyages without additional load line marks and/or 
certificates. Where additional load line marks and certificates are 
provided to specifically cover ``Special Service, Coastwise'' or ``Great 
Lakes'' operation, such vessels are subject to the applicable provisions 
of Parts 44 and 45 of this subchapter.
    (b) Vessels engaged in domestic voyages by sea. (1) All U.S.-flag 
vessels which engage in domestic voyages by sea (coastwise and 
intercoastal voyages) shall be subject to the applicable provisions of 
this part except the following:
    (i) Merchant vessels of less than 150 gross tons.
    (ii) Vessels which are mechanically propelled and numbered by a 
State or the Coast Guard under the Federal Boat Safety Act of 1971 (46 
U.S.C. 1451 et seq.) and not required by other laws to be inspected or 
certified by the U.S. Coast Guard. (This exception includes all 
mechanically propelled vessels of less than 150 gross tons, and 
uninspected motor propelled oceanographic vessels of less than 300 gross 
tons while operating pursuant to section 445 of Title 46, U.S. Code.)
    (iii) Pleasure craft not used or engaged in trade or commerce.
    (iv) Barges of less than 150 gross tons.

[[Page 8]]

    (v) Vessels engaged exclusively in voyages on waters within the 
United States or its possessions and which are determined not to be 
``coastwise'' or ``Great Lakes'' voyages.
    (vi) Ships of war.
    (vii) U.S. public vessels other than those vessels of 150 gross tons 
or over and engaged in commercial activities.
    (2) In order for existing vessels to take advantage of any reduction 
in freeboards from those previously assigned, paragraph (a)(2) of this 
section applies.
    (c) Vessels engaged solely on Great Lakes voyages. A U.S. flag 
vessel 79 feet and more and 150 gross tons or over that engages solely 
on Great Lakes voyages is subject to the applicable provisions of this 
part and Part 45 of this subchapter and must comply with the regulations 
in force on the date the keel is laid or a similar progress in 
construction is made.
    (d) Special service coastwise voyage. A U.S. flag vessel 150 gross 
tons or over that engages in a ``special service coastwise voyage'' is 
subject to the applicable provisions of this part and Part 44 of this 
subchapter.
    (e) Hopper dredges engaged in limited service domestic voyages. 
Self-propelled hopper dredges over 79 feet (24 meters) in length with 
working freeboards, on limited service domestic voyages within 20 
nautical miles (37 kilometers) from the mouth of a harbor of safe 
refuge, are subject to the provisions of this subchapter that apply to a 
Type ``B'' vessel and to the provisions of Subpart E of Part 44 of this 
chapter.

[CGFR 68-60, 33 FR 10049, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9011, June 5, 1969; CGD 73-49R, 38 FR 12289, May 10, 1973; CGD 80-
120, 47 FR 5721, Feb. 8, 1982; CGD 86-016, 51 FR 9962, Mar. 24, 1986; 
CDG 76-080, 54 FR 36976, Sept. 6, 1989]



Sec. 42.03-10  Foreign vessels subject to this subchapter.

    (a) General. All existing foreign merchant vessels of 150 gross tons 
or over, and new foreign vessels of 79 feet in length or more, loading 
at or proceeding from any port or place within the jurisdiction of the 
United States or its possessions for a foreign voyage by sea, or 
arriving within the jurisdiction of the United States or its possessions 
from a foreign voyage by sea, in both cases the Great Lakes excepted, 
are subject to the International Load Line Act of 1973, as amended (46 
U.S.C. 86-86i), and the regulations in this part applicable to such 
service. All foreign merchant vessels of 150 gross tons or over, loading 
at or proceeding from any port or place within the United States on the 
Great Lakes of North America, or arriving within the jurisdiction of the 
United States on the Great Lakes, are subject to the Coastwise Load Line 
Act of 1935, as amended (46 U.S.C. 88-88i) and the regulations in part 
45 of this subchapter applicable to such service.
    (b) Canadian vessels. All vessels of Canadian registry and holding 
valid certificates issued pursuant to Canadian laws and regulations are 
assumed to be in compliance with the applicable provisions of the 
International Load Line Act of 1973, as amended (46 U.S.C. 86-86i) and 
the Coastwise Load Line Act of 1935, as amended (46 U.S.C. 88-88i), the 
International Convention on Load Lines, 1966, and the regulations in 
this subchapter.
    (c) Vessels of countries signatory to or adhering to the 1966 
Convention. The enforcement and control of load line requirements 
regarding vessels of countries signatory to or adhering to The 
International Convention on Load Lines, 1966, (the 1966 Convention) are 
as described in Sec. 42.07-60 in this part, which is in accord with 
provisions of Article 21 of the 1966 Convention. Such vessels when 
holding currently valid certificates issued pursuant to the 1966 
Convention, or recognized under such Convention, are assumed to be in 
compliance with the applicable provisions of such Convention. Such 
vessels are deemed to be in compliance with the load line requirements 
found to be equally effective as those established in this part and 
therefore in compliance with the applicable load line provisions of the 
International Load Line Act of 1973, as amended, the Coastwise Load Line 
Act of 1935, as amended, and the regulations in this part as authorized 
by such laws. Vessels engaged in navigation on the Great Lakes are 
subject to application of seasonal international marks as specified in 
Part 45 of this subchapter.

[[Page 9]]

    (d) Vessels of countries not signatory to or adhering to the 1966 
Convention. (1) Vessels of countries not signatory to or adhering to the 
1966 Convention, when within the jurisdiction of the United States, 
shall be subject to the International Load Line Act of 1973, as amended, 
the Coastwise Load Line Act of 1935, as amended, and the regulations in 
this subchapter as authorized by such laws.
    (2) Vessels of countries signatory to or adhering only to 
International Loan Line Convention, London, 1930 (the 1930 Convention), 
and holding valid certificates issued under that Convention, are subject 
to the applicable law described in paragraph (a) of this section and the 
regulations prescribed thereunder in this subchapter.

[CGD 80-120, 47 FR 5722, Feb. 8, 1982]



Sec. 42.03-15   The Great Lakes of North America.

    (a) The term ``Great Lakes of North America'' means those waters of 
North America which are defined in Sec. 42.05-40, and in the exception 
in Article 5(2)(a) of the 1966 Convention.
    (b) The expressions in the regulations in this part, such as 
``voyages by sea,'' ``proceed to sea,'' ``arrive from the high seas,'' 
etc., shall be construed as having no application to voyages on the 
Great Lakes or portions thereof unless specifically provided otherwise 
in Part 45 of this subchapter.

[CGFR 68-60, 33 FR 10050, July 12, 1968]



Sec. 42.03-17   Special load line marks for vessels carrying timber deck cargo.

    (a) Certain vessels having load line marks not related to carriage 
of timber deck cargo may be assigned timber load lines if they are in 
compliance with the applicable requirements governing timber deck 
cargoes in this subchapter. The timber load lines apply and may be used 
only when the vessel is carrying timber deck cargo.
    (b) A new or existing vessel having timber load lines assigned to 
it, when carrying timber deck cargo, may be loaded to the vessel's 
timber load line applicable to the voyage and season.

[CGFR 68-60, 33 FR 10050, July 12, 1968, as amended by CGD 80-120, 47 FR 
5722, Feb. 8, 1982]



Sec. 42.03-20   Equivalents.

    (a) Where in this subchapter it is provided that a particular 
fitting, material, appliance, apparatus, or equipment, or type thereof, 
shall be fitted or carried in a vessel, or that a particular provision 
shall be made or arrangement shall be adopted, the assigning authority, 
with the prior approval of the Commandant, may accept in substitution 
therefor any other fitting, material, apparatus, or equipment or type 
thereof, or any other provision or arrangement: Provided, That it can be 
demonstrated by trial thereof or otherwise that the substitution is at 
least as effective as that required by the regulations in this 
subchapter.
    (b) In any case where it is shown to the satisfaction of the 
assigning authority and the Commandant that the use of any particular 
equipment, apparatus, or arrangement not specifically required by law is 
unreasonable or impracticable, appropriate alternatives may be permitted 
under such conditions as are consistent with the minimum standards set 
forth in this subchapter.

[CGFR 68-60, 33 FR 10050, July 12, 1968]



Sec. 42.03-25   Experimental installations.

    (a) Complete information (including plans, necessary instructions 
and limitations, if any) on proposed experimental installations 
affecting any fitting, material, appliance, apparatus, arrangement, or 
otherwise shall be submitted to the assigning authority for evaluation. 
After acceptance by the assigning authority, the complete information of 
such installation shall be forwarded to the Commandant for specific 
approval prior to installation. Complete information shall also be 
furnished for any associated installation(s) deemed necessary to prevent 
endangering the vessel during the trial period of proposed experimental 
installations.
    (b) The use of approved experimental installations shall be 
permitted only when in accordance with instructions and limitations as 
specifically prescribed for such installations by the Commandant.

[CGFR 68-60, 33 FR 10050, July 12, 1968]

[[Page 10]]



Sec. 42.03-30   Exemptions for vessels.

    (a) For an individual vessel or category of vessels, upon the 
specific recommendation of the assigning authority, the Commandant may 
authorize an exemption from one or more load line requirements. Such 
recommendation and authorization will depend upon provision of any 
additional features as deemed necessary by the authorities to ensure the 
vessel's safety in the services and under the conditions specified in 
paragraph (b) of this section.
    (b) Exemptions from specific load line requirements for vessels 
meeting requirements of paragraph (a) of this section are authorized, 
subject to certain conditions, including type of voyage engaged in, as 
follows:
    (1) For vessels engaged on international voyages between the United 
States and near neighboring ports of its possessions or of foreign 
countries. The exemptions may be permitted because the requirements are 
deemed to be unreasonable or impracticable due to the sheltered nature 
of the waters on which the voyages occur or other conditions. These 
exemptions shall be valid only so long as such a vessel shall remain 
engaged on specific designated voyages. If the voyage involves a foreign 
country or countries, the United States will require an exemption 
agreement with such country or countries prior to the issuance of the 
appropriate load line certificate.
    (2) For vessels engaged on international voyages which embody 
features of a novel kind, and where nonexemption may seriously impede 
research, development, and incorporation of novel features into vessels. 
If the voyage or voyages intended involve a foreign country or 
countries, then the United States will require an exemption agreement 
with such country or countries prior to the issuance of a Load Line 
Exemption Certificate. If the Commandant grants an exemption pursuant to 
this paragraph (b)(2) to a U.S. flag vessel that operates on the Great 
Lakes of North America, he may notify the Chairman of the Board of 
Steamship Inspection of Canada of the nature of the exemption, but no 
special exemption certificate is issued.
    (3) For a vessel not normally engaged on international voyages but 
which is required to undertake a single international voyage under 
exceptional circumstances.
    (4) For self-propelled hopper dredges engaged on international 
voyages or on limited service domestic voyages by sea. These vessels may 
be exempt from applicable hatch cover requirements of Sec. 42.15-25 of 
this part by showing they meet the requirements in Sec. 174.310 of this 
chapter. When a Load Line Exemption Certificate is issued for this 
exemption, it must have an endorsement that only seawater is allowed in 
the vessel's hoppers.
    (c) A vessel given one or more exemptions from load line 
requirements under the provisions of paragraph (b)(1) of this section 
will be issued the appropriate load line certificate, using Form A1, A2, 
or A3. In each case the exemptions shall be specified on the load line 
certificate together with the Convention authority which authorizes such 
exemptions.
    (d) A vessel given one or more exemptions under the provisions of 
paragraph (b)(2) or (b)(3) of this section will be issued a Load Line 
Exemption Certificate, using Form E1. This certificate shall be in lieu 
of a regular load line certificate, and the vessel shall be considered 
as in compliance with applicable load line requirements.
    (e) The Commandant may exempt from any of the requirements of this 
part a vessel that engages on a domestic voyage by sea or a voyage 
solely on the Great Lakes and embodies features of a novel kind, if the 
novel features and any additional safety measures required are described 
on the face of the issued certificate.
    (f) A vessel that is not usually engaged on domestic voyages by sea 
or on voyages on the Great Lakes but that, in exceptional circumstances, 
is required to undertake a single such voyage between two specific ports 
is--
    (1) Subject to the Coastwise Load Line, Act, as amended and the 
applicable regulations of this subchapter; and
    (2) Issued a single voyage load line authorization by the Commandant 
that states the conditions under which the

[[Page 11]]

voyage may be made and any additional safety measures required for a 
single voyage.

[CGFR 68-126, 34 FR 9011, June 5, 1969, as amended by CGD 73-49R, 38 FR 
12289, May 10, 1973; CGD 76-080, 54 FR 36976, Sept. 6, 1989]



Sec. 42.03-35   U.S.-flag vessels and Canadian vessels navigating on sheltered waters of Puget Sound and contiguous west coast waters of United States and 
          Canada.

    (a) In a Treaty between the United States and Canada proclaimed on 
August 11, 1934, the respective Governments were satisfied of the 
sheltered nature of certain waters of the west coast of North America. 
It was agreed to exempt vessels of the United States and Canadian 
vessels from load line requirements when such vessels engage on 
international voyages originating on, wholly confined to, and 
terminating on such waters. In Article I of this Treaty these waters are 
described as follows: ``* * * the waters of Puget Sound, the waters 
lying between Vancouver Island and the mainland, and east of a line from 
a point 1 nautical mile west of the city limits of Port Angeles in the 
State of Washington to Race Rocks on Vancouver Island, and of a line 
from Hope Island, British Columbia, to Cape Calvert, Calvert Island, 
British Columbia, the waters east of a line from Cape Calvert to Duke 
Point on Duke Island, and the waters north of Duke Island and east of 
Prince of Wales Island, Baranof Island, and Chicagof Island, the waters 
of Peril, Neva, and Olga Straits to Sitka, and the waters east of a line 
from Port Althorp of Chicagof Island to Cape Spencer, Alaska, are 
sheltered waters * * *.''
    (b) U.S.-flag vessels and Canadian vessels navigating on the treaty 
waters on a voyage as described in paragraph (a) of this section are by 
virtue of this Treaty of August 11, 1934, not subject to load line 
requirements in the load line acts, the 1966 Convention, and the 
regulations in this subchapter. Vessels navigating these sheltered 
waters and passing outside their boundary on any voyage cannot claim the 
benefits of this Treaty and shall be in compliance with the applicable 
load line requirements in the load line acts, the 1966 Convention, and 
the regulations in this subchapter.
    (c) Since subdivision requirements apply to all passenger vessels 
subject to the 1960 International Convention on Safety of Life at Sea, 
those passenger vessels navigating on the waters described in paragraph 
(a) of this section shall be in compliance with such 1960 Convention 
requirements and the regulations in part 46 of this subchapter. The 
Coast Guard issues to such a vessel a stability letter. The assigning 
authority is authorized to issue to such a passenger vessel an 
appropriate load line certificate, modified to meet the conditions 
governing her service assignment, and marking.

[CGFR 68-60, 33 FR 10051, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9011, June 5, 1969]



       Subpart 42.05--Definition of Terms Used in This Subchapter



Sec. 42.05-1   Approved.

    This term means approved by the Commandant, U.S. Coast Guard, unless 
otherwise stated.

[CGFR 68-60, 33 FR 10051, July 12, 1968]



Sec. 42.05-10   Assigning authority.

    This term means the ``American Bureau of Shipping'' or such other 
recognized classification society which the Commandant may approve as 
the load line assigning and issuing authority for a vessel, as provided 
in sections 3 of the load line acts.

[CGFR 68-60, 33 FR 10051, July 12, 1968]



Sec. 42.05-20   Commandant.

    This term means the Commandant, U.S. Coast Guard, Washington, DC 
20593-0001.

[CGFR 68-60, 33 FR 10051, July 12, 1968, as amended by CGD 88-070, 53 FR 
34534, Sept. 7, 1988]



Sec. 42.05-25   Coast Guard District Commander or District Commander.

    These terms mean an officer of the Coast Guard designated as such by 
the Commandant to command all Coast Guard activities within his 
district. This includes enforcement of load line

[[Page 12]]

requirements as described in this subchapter.

[CGFR 68-60, 33 FR 10051, July 12, 1968]



Sec. 42.05-30   Existing vessel.

    (a) As used in this part 42, for a vessel engaged on international 
voyages or on domestic voyages by sea, the term existing vessel means a 
vessel which is not a new vessel. With few exceptions an existing vessel 
is a vessel the keel of which was laid, or which was at a similar stage 
of construction, prior to July 21, 1968. (See Sec. 42.05-50 for the 
definition of a new vessel.)
    (b)--(c) [Reserved]
    (d) As used in part 44 of this subchapter, for a vessel marked with 
load lines for special service on a coastwise or interisland voyage, the 
term existing vessel means one whose keel was laid prior to September 
28, 1937. (See Sec. 44.01-20 of this subchapter.)
    (e) As used in part 45 of this subchapter, existing vessel in all 
regulations pertaining to a vessel engaged solely on Great Lakes voyages 
before April 14, 1973, means a vessel whose keel was laid before August 
27, 1936. The regulations pertaining to these vessels that are in effect 
after April 14, 1973, do not use the term existing vessel.
    (f) As used in part 46 of this subchapter, for a passenger vessel 
marked with subdivision load lines, the term existing vessel means a 
vessel whose keel was laid or was converted to such service prior to May 
26, 1965. (See Sec. 46.05-30 of this subchapter.)

[CGFR 68-60, 33 FR 10051, July 12, 1968, as amended by CGD 73-49R, 38 FR 
12290, May 10, 1973; CGD 80-120, 47 FR 5722, Feb. 8, 1982]



Sec. 42.05-40   Great Lakes.

    (a) This term means the Great Lakes of North America.
    (b) As used in this part, the term solely navigating the Great Lakes 
includes any special service coastwise navigation performed by the 
vessel.
    (c) In concurrence with related Canadian regulations, the waters of 
the St. Lawrence River west of a rhumb line drawn from Cap de Rosiers to 
West Point, Anticosti Island, and west of a line along 63 deg. W. 
longitude from Anticosti Island to the north shore of the St. Lawrence 
River shall be considered as a part of the Great Lakes. In addition, the 
Victoria Bridge, Montreal, Canada, is the dividing line between fresh 
water and salt water in the St. Lawrence River.

[CGFR 68-60, 33 FR 10051, July 12, 1968, as amended by CGD 73-49R, 38 FR 
12290, May 10, 1973]



Sec. 42.05-45   International voyage.

    (a) The term international voyage as used in this part shall have 
the same meaning as the term international voyage in Article 2(4) of the 
1966 Convention. Except for vessels operating solely on the waters 
indicated in Article 5(2) of the 1966 Convention, an international 
voyage means a sea voyage from any country to a port outside such 
country, or conversely. For this purpose, every territory for the 
international relations of which any specific Contracting Government is 
responsible or for which the United Nations are the administering 
authority is regarded as a separate country.
    (b) The 1966 Convention does not apply to vessels solely navigating 
the Great Lakes. Accordingly, such vessels shall not be considered as 
being on an international voyage for the purpose of this subchapter.
    (c) For the purpose of administration of load line requirements in 
this subchapter, the Commonwealth of Puerto Rico, the Territory of Guam, 
the Virgin Islands, and all possessions and lands held by the United 
States under a protectorate or mandate shall each be considered to be a 
territory of the United States.

[CGFR 68-60, 33 FR 10051, July 12, 1968]



Sec. 42.05-47   Marine inspector or inspector.

    These terms mean any person from the civilian or military branch of 
the Coast Guard assigned under the superintendence and direction of an 
Officer in Charge, Marine Inspection, or any other person as may be 
designated for the performance of duties with respect to the inspection, 
enforcement, and administration of title 52, Revised Statutes, and acts 
amendatory thereof or supplemental thereto, and rules and regulations 
thereunder.

[CGFR 68-60, 33 FR 10051, July 12, 1968]

[[Page 13]]



Sec. 42.05-50   New vessel.

    (a) As used in this part 42, for a vessel engaged on international 
voyages or on domestic voyages by sea, the term new vessel means a 
vessel, the keel of which is laid, or which is at a similar stage of 
construction, on or after July 21, 1968. (See Sec. 42.05-30 for 
definition of an existing vessel.)
    (1) This definition applies to all vessels of countries signatory to 
or acceding to the 1966 Convention prior to April 21, 1968, and to 
vessels of countries not adhering to an applicable Convention as 
indicated in Article 16(4) of the 1966 Convention.
    (2) For countries which accede to the 1966 Convention after April 
21, 1968, a new vessel (foreign) shall be one whose keel is 
constructively laid 3 months or more after such date.
    (b)--(c) [Reserved]
    (d) As used in part 44 of this subchapter, for a vessel marked with 
load lines for special service on a coastwise or interisland voyage, the 
term new vessel means one whose keel is laid on or after September 28, 
1937. (See Sec. 44.01-20 of this subchapter.)
    (e) As used in part 45 of this subchapter, for a vessel engaged 
solely on Great Lakes voyages, the term new vessel means one whose keel 
is laid on or after August 27, 1936. (See Sec. 45.01-10 of this 
subchapter.)
    (f) As used in part 46 of this subchapter, for a passenger vessel 
marked with subdivision load lines, the term new vessel means a vessel 
whose keel is laid or is converted to such service on or after May 26, 
1965. (See Sec. 46.05-25 of this subchapter.)

[CGFR 68-60, 33 FR 10051, July 12, 1968 as amended by CGD 80-120, 47 FR 
5722, Feb. 8, 1982]



Sec. 42.05-55   Officer in Charge, Marine Inspection.

    This term means any person from the civilian or military branch of 
the Coast Guard designated as such by the Commandant and who, under the 
superintendence and direction of the Coast Guard District Commander, is 
in charge of a marine inspection zone, and may supervise or perform the 
duties of a marine inspector.

[CGFR 68-60, 33 FR 10052, July 12, 1968]



Sec. 42.05-60   Recognized classification society.

    The term recognized classification society means the American Bureau 
of Shipping or other classification society recognized by the 
Commandant, as provided in section 3 of the load line acts, and who also 
may be approved as a load line assigning and issuing authority.

[CGFR 68-60, 33 FR 10052, July 12, 1968]



Sec. 42.05-63   Ship(s) and vessel(s).

    The terms ship(s) and vessel(s) are interchangeable or synonymous 
words, and include every description of watercraft, other than a 
seaplane on the water, used or capable of being used as a means of 
transportation on water.

[CGFR 68-126, 34 FR 9011, June 5, 1969]



Sec. 42.05-65   Surveyor.

    The term surveyor means any person designated by the American Bureau 
of Shipping or other classification society recognized by the Commandant 
as the person who actually examines the vessel and/or materials 
associated with such examination, and who ascertains such vessel 
complies with applicable load line requirements.

[CGFR 68-60, 33 FR 10052, July 12, 1968]



        Subpart 42.07--Control, Enforcement, and Rights of Appeal



Sec. 42.07-1   Load lines required.

    (a) The vessels listed in Secs. 42.03-5 and 42.03-10 as subject to 
the applicable requirements in this subchapter shall have load lines 
accurately marked amidships, port and starboard, as provided in this 
part 42 or the 1966 Convention, unless otherwise stated. Those vessels 
issued load line exemption certificates may not be required to have load 
line marks (see Sec. 42.03-30).
    (b) For vessels marked with international load lines and navigating 
the Great Lakes, such vessels are also subject to requirements in part 
45 of this subchapter while on the Great Lakes. See Sec. 45.9 of this 
subchapter for load line marks used by such vessels.
    (c) For Great Lakes vessels operating solely on Great Lakes voyages, 
the requirements for the applicable load line

[[Page 14]]

marks are in part 45 of this subchapter. Great Lakes vessels when making 
other international or unlimited coastwise voyages shall comply with the 
applicable requirements in parts 42, 44, and 45 of this subchapter.
    (d) For coastwise steam colliers, barges, and self-propelled barges 
in special services, the requirements for the applicable load line marks 
are in part 44 of this subchapter. These requirements also include 
certain regulations governing such vessels when they additionally engage 
in Great Lakes voyages, international voyages or unlimited coastwise 
voyages. Load line requirements in this part 42 also apply to such 
vessels when engaged on international or unlimited coastwise voyages.
    (e) Existing U.S.-flag vessels, as defined in Sec. 42.05-30(a) of 
this chapter, engaged in international or coastwise voyages, may retain 
the load line assigned under previous regulations, provided:
    (1) The vessel has not been assigned a reduced freeboard under the 
regulations in this part 42, and
    (2) The form of the load line certificate issued to and carried on 
board the vessel conforms to the requirements of subpart 42.50 of this 
part or Sec. 44.05-35 or Sec. 46.10-30 of this chapter.
    (f) This part applies to foreign vessels of countries--
    (1) Signatory to or adhering to the 1966 Convention;
    (2) Adhering to the 1930 Convention and not acceding to the 1966 
Convention, or;
    (3) Not adhering to either the 1930 Convention or the 1966 
Convention but subject to the load line acts.

[CGFR 68-60, 33 FR 10052, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9011, June 5, 1969; CGD 73-49R, 38 FR 12290, May 10, 1973; CGD 80-
120, 47 FR 5722, Feb. 8, 1982]



Sec. 42.07-5  Marks placed on vessel to indicate load lines.

    (a) Load line marks to indicate the maximum amidship's draft to 
which a vessel can be lawfully submerged, in the various circumstances 
and seasons, shall be permanently marked on each side of the vessel in 
the form, manner, and location as required by this subchapter.
    (b) The load line marks placed on a vessel shall be attested to by a 
valid load line certificate as required by Sec. 42.07-45(b). The issuing 
authority shall not deliver any required load line certificate to the 
vessel until after its surveyor has ascertained that the vessel meets 
the applicable survey requirements and the correct placement of the 
marks on the vessel's sides has been confirmed.
    (c) The requirements for load line marks apply to all new and 
existing vessels as specified in Secs. 42.03-5 and 42.03-10, except when 
a vessel has been issued a load line exemption certificate in lieu of a 
load line certificate.

[CGFR 68-60, 33 FR 10052, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969]



Sec. 42.07-10   Submergence of load line marks.

    (a) Except as provided otherwise in this section, vessels of the 
types described in paragraphs (a)(1) through (a)(3) of this section 
shall not be so loaded as to submerge at any time when departing for a 
voyage by sea, or on the Great Lakes, or during the voyage, or on 
arrival, the applicable load lines marked on the sides of the vessel for 
the season of the year and the zone or area in which the vessel may be 
operating.
    (1) Merchant vessels of 150 gross tons or over, as described in 
Sec. 42.03-5 or Sec. 42.03-10, and on voyages subject to the load line 
acts.
    (2) All new vessels of 79 feet or over in length on voyages subject 
to the 1966 Convention.
    (3) All vessels of 150 gross tons or over, other than merchant 
vessels covered by paragraph (a)(1) of this section, on voyages subject 
to the 1966 Convention.
    (b) When loading a vessel in a favorable zone for a voyage on which 
the vessel will enter a less favorable zone, such allowances must be 
made that the vessel when crossing into the less favorable zone, will 
conform to the regulations and freeboard for the less favorable zone.
    (c) When a vessel is in fresh water of unit density, the appropriate 
load line may be submerged by the amount of the fresh water allowance 
shown on the

[[Page 15]]

applicable load line certificate. Where the density is other than unity, 
an allowance shall be made proportional to the difference betwen 1.025 
and the actual density. This paragraph does not apply to vessels when 
navigating the Great Lakes.
    (d) When a vessel departs from a port situated on a river or inland 
waters, deeper loading shall be permitted corresponding to the weight of 
fuel and all other materials required for consumption between the port 
of departure and the sea. This paragraph does not apply to vessels when 
navigating the Great Lakes.

[CGFR 68-60, 33 FR 10052, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969]



Sec. 42.07-15   Zones and seasonal areas.

    (a) A vessel subject to the load line acts or the 1966 Convention 
shall comply, as applicable, with the requirements regarding the zones 
and seasonal areas described in subpart 42.30.
    (b) A port located on the boundary line between two zones or areas 
shall be regarded as within the zone or seasonal area from or into which 
the vessel arrives or departs.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-20   Logbook entries.

    (a) As described in Sec. 3.13-35 of Subchapter A (Procedures 
Applicable to the Public) of this chapter, official logbooks (Form CG-
706-C), are furnished free to certain vessels, and after they have 
served their purpose they are filed with the applicable Officer in 
Charge, Marine Inspection.
    (b) The master shall be responsible for having entered in the 
vessel's ``official logbook'' if carried, otherwise in his own log 
considered as its official logbook, the data required by section 6 of 
the load line acts. These logbooks entries shall be made before a vessel 
departs from her loading port or place and consist of:
    (1) A statement of the load line marks applicable to the voyage; 
and,
    (2) A statement of the position of the load line marks, port and 
starboard, at the time of departing from a port or place; i.e., the 
distance in inches of the water surface above or below the applicable 
load line; and,
    (3) The actual drafts of the vessel, forward and aft, as nearly as 
the same can be ascertained, at the time of departing from a port or 
place.
    (c) Where the master uses his own log, it shall be kept by the 
master or owner for 1 year after the actions noted therein have been 
completed and upon request shall be furnished to any load line 
enforcement officer.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-25   Approval of the Commandant.

    (a) Where the requirements in this subchapter state that the 
approval of the Commandant is necessary, the owner or his agent shall 
furnish all information necessary, including background material, and/or 
final plans, calculations, and conclusions reached, as will enable the 
Commandant to obtain a comprehensive understanding of and reach a 
decision relative to the question or problem at issue prior to 
proceeding with the work. All information, plans and calculations 
submitted will remain with the Commandant as a part of the record on the 
vessel.
    (b) If the owner or his agent desires to have information, plans, 
and calculations returned with Commandant's actions noted thereon, or if 
distribution of such information is necessary or required by regulations 
in this subchapter to owners, masters of vessels, etc., then the owner 
or his agent shall furnish multiple copies of the information as 
required.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-30   Approval of the assigning authority.

    (a) Where the requirements in this subchapter state the approval of 
an assigning authority is required, the owner or his agent shall furnish 
the required information, including plans, etc., as required by and 
which will enable the assigning authority to obtain a comprehensive 
understanding of the matter and to reach pertinent decisions prior to 
proceeding with the work. When requested the assigning authority shall 
furnish the Coast Guard all information, etc., on any

[[Page 16]]

question at issue and decisions reached.
    (b) All information required under this subchapter by an assigning 
authority with respect to a specific vessel shall be retained until 5 
years after termination of certification by such authority.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-35   American Bureau of Shipping as an assigning authority.

    (a) The American Bureau of Shipping, with its home office at Two 
World Trade Center, 106th Floor, New York, NY 10048, is hereby appointed 
as the prime assigning and issuing authority under the provisions of 
Articles 13 and 16(3) of the 1966 Convention and as directed by sections 
3 of the load line acts. In this capacity the American Bureau of 
Shipping is empowered to assign load lines, to perform surveys required 
for load line assignments, and to determine that the position of and the 
manner of marking vessels has been done in accordance with applicable 
requirements.
    (b) On behalf of the United States of America, the American Bureau 
of Shipping is authorized to issue or reissue, under its own seal and 
signature of its officials, the appropriate load line certificates or 
International Load Line Exemption Certificate as described in subpart 
42.50 of this part or in parts 44 to 46, inclusive, of this subchapter. 
Except for the International Load Line Exemption Certificate, the 
required load line certificate issued to a specific vessel shall certify 
to the correctness of the load line marks assigned and marked on the 
vessel and compliance with authorized conditions, restrictions, and/or 
exemptions, if any. The International Load Line Exemption Certificate 
when issued to a vessel shall certify as to the compliance with the 
information applicable to the vessel.
    (c) The designation and delegation to the American Bureau of 
Shipping as an assigning and issuing authority shall be in effect 
indefinitely unless for due cause it shall be terminated by proper 
authority and notice of cancellation is published in the Federal 
Register.
    (d) The American Bureau of Shipping is authorized to revalidate from 
time to time by endorsement a load line certificate or an International 
Load Line Exemption Certificate.
    (e) Before revalidating any certificate by endorsement, the American 
Bureau of Shipping shall verify that the required load line marks 
assigned are marked on the vessel and the vessel is in compliance with 
authorized conditions, restrictions, and/or exemptions, if any.
    (f) The American Bureau of Shipping shall issue all load line 
certificates in duplicate; one copy shall be delivered to the owner or 
master of the vessel, and one copy (together with a summary of data used 
to determine the assigned load lines) shall be forwarded to the 
Commandant.
    (g) The American Bureau of Shipping shall prepare a load line survey 
report on each new vessel or existing vessel when brought into complete 
compliance with this part prior to issuing the required load line 
certificate described in subpart 42.50 of this part. At the time the 
certificate is delivered, one copy of this report shall be delivered to 
the master of the vessel, and one copy shall be forwarded to the 
Commandant. When a load line survey report is superseded or revised, one 
copy shall be delivered to the master of the vessel, and one copy shall 
be forwarded to the Commandant.
    (h) The load line survey report or stability information furnished 
to a specific vessel shall include a statement of the locations of all 
watertight subdivision bulkheads, including steps or recesses therein, 
which may be involved in the vessel's load line assignment.

[CGFR 68-60, 33 FR 10053, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969; CGD 80-143, 47 FR 25149, June 10, 1982; CGD 96-
041, 61 FR 50727, Sept. 27, 1996]



Sec. 42.07-40   Recognized classification society as an assigning authority.

    (a) On behalf of the United States of America, under the provisions 
of Articles 13 and 16(3) and as provided in sections 3 of the load line 
acts, the Commandant, at the request of a shipowner, may appoint any 
other recognized classification society, which he may approve, as the 
assigning and issuing authority who shall perform the same functions and 
duties as indicated

[[Page 17]]

in Sec. 42.07-35 for the American Bureau of Shipping.
    (b) The appointment of a recognized classification society as the 
assigning and issuing authority will be limited to vessels specifically 
designated by the Commandant.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-43   Change in assigning authority.

    (a) If the owner desires a change in assigning and issuing authority 
for a vessel, a special request shall be made in writing to the 
Commandant at least 90 days prior to the expiration date of the present 
certificate or the annual endorsement thereon.
    (b) A change in the assigning authority does not presume any change 
in assigned load lines.

[CGFR 68-60, 33 FR 10053, July 12, 1968]



Sec. 42.07-45   Load line certificates.

    (a) The load line certificates for which the Government of the 
United States of America assumes full responsibility may be issued by 
the Commandant, the American Bureau of Shipping, or a recognized 
classification society when appointed as an authorized assigning and 
issuing authority for specifically designated vessels.
    (b) The load line certificate shall certify to the correctness of 
the load line marks assigned to the vessel and that the vessel is in 
compliance with applicable requirements. A certificate issued under this 
subchapter also shall describe the applicable load line marks, 
conditions, restrictions, and/or exemptions, if any, the vessel shall 
observe, according to the season of the year and the zone or area in 
which the vessel may operate. The load line exemption certificate issued 
under Sec. 42.03-30 shall certify the special conditions the vessel 
shall observe.
    (c) A load line assignment and certificate issued to any vessel 
under the authority of the regulations in this subchapter (or under the 
authority of any Government adhering to the 1966 Convention, under the 
provisions of Article 19(5) of the 1966 Convention) shall cease to be 
valid upon the transfer of such vessel to the flag of another 
Government.
    (d) Each loadline certificate is issued for the following length of 
time:
    (1) An international and coastwise certificate is issued for 5 years 
and may be extended by the Commandant up to 150 days from the date of 
the--
    (i) Survey that is endorsed on the certificate by the surveyor 
authorized by the Coast Guard; or
    (ii) Last day of the 5-year period.
    (2) A Great Lakes certificate is issued for 5 years and may be 
extended by the Commander, Ninth Coast Guard District, up to 365 days 
from date of the--
    (i) Survey that is endorsed on the certificate by the surveyor 
authorized by the Coast Guard; or
    (ii) Last day of the 5-year period.
    (e) The form of certificate certifying to the correctness of the 
load line marks, assigned under the regulations in this part, may be in 
the form of temporary or provisional certificate, signed by the 
authorized surveyor pending early issuance of appropriate certificate as 
shown in subpart 42.50 of this part as follows:
    (1) International Load Line Certificate, 1966, issued to U.S. 
vessels engaged in foreign voyages, or engaged in coastwise or 
intercoastal voyages (provided such vessels qualify to engage in foreign 
voyages without restriction), as follows:
    (i) Form A1, For general use.
    (ii) Form A2, For sailing vessels.
    (iii) Form A3, For general use, combined with timber deck cargo.
    (2) Certificate issued to foreign vessels belonging to countries 
that have not ratified or acceded to the 1966 Convention as follows:
    (i) Form B, For general use.
    (3) Coastwise load line certificate (other than for special service 
as provided for by part 44 of this subchapter) issued to U.S. vessels 
engaged solely in coastwise and/or intercoastal voyages (which may be 
subject to restrictions as to manning, routes, seasons, waters of 
operations, etc., as shown on the face of the certificate), as follows:
    (i) Form C1, For general use.
    (ii) Form C2, For sailing ships.
    (iii) Form C3, For general use, combined with timber deck cargo.
    (f) The form of certificate certifying to the correctness of 
exemptions granted under the regulations in this part

[[Page 18]]

shall be as shown in subpart 42.50 of this part as follows:
    (1) International load line exemption certificate issued under 
special conditions to U.S.-flag vessels engaged in foreign voyages, as 
follows:
    (i) Form E1, For general international use.
    (ii) Where this certificate is intended to expire after a single 
voyage, this information shall be noted on the face of the certificate.
    (2) International load line certificate Form A1, A2, or A3 issued 
under special conditions to U.S.-flag vessels on international voyages 
between the United States and near neighboring ports of its possessions 
or of foreign countries. Exemptions, if any, shall be specified on the 
certificate.
    (g) The issuing authority shall provide the printed forms it may use 
under the regulations in this subchapter. These forms shall be approved 
by the Commandant before final printing. The international load line 
certificate and exemption certificate forms shall exactly reproduce the 
arrangement of the printed part of the model Forms A1, A2, A3, and E1 
indicated in subpart 42.50 of this part for all official copies and any 
certified copies issued.
    (h) Where a vessel qualifies for and is issued a Form E1 
International Load Line Exemption Certificate for foreign voyages but is 
also or solely engaged in coastwise or intercoastal voyages by sea, this 
certificate shall be considered equivalent to a valid coastwise load 
line certificate. In such case the vessel shall be deemed in full 
compliance with the Coastwise Load Line Act and the regulations in this 
part promulgated thereunder.

[CGFR 68-60, 33 FR 10054, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969; CGD 73-49R, 38 FR 12290, May 10, 1973; CGD-74; 
153, 39 FR 25324, July 10, 1974; CGD 80-120, 47 FR 5722, Feb. 8, 1982; 
CGD 96-006, 61 FR 35964, July 9, 1996]

    Effective Date Note: By CGD 96-006, 61 FR 35964, July 9, 1996, in 
Sec. 42.07-45, paragraph (d)(2) introductory text was revised, effective 
Oct. 7, 1996. For the convenience of the user, the superseded text is 
set forth as follows:
Sec. 42.07-45  Load line certificates.

                                * * * * *

    (d) * * *
    (2) A Great Lakes certificate is issued for 5 years and may be 
extended by the Commander, Ninth Coast Guard District up to 90 days from 
the date of the--

                                * * * * *



Sec. 42.07-50  Penalties for violations.

    (a) The penalties for violation of various provisions of the load 
line acts or the regulations established thereunder are set forth in 
title 46, United States Code, sections 86i and 88g. The Secretary of 
Transportation by 49 CFR 1.46(b) has transferred to the Commandant 
authority to assess, collect, remit or litigate any monetary penalty 
imposed under these laws.
    (b) The master and/or owner of a vessel that is operated, navigated, 
or used in violation of the provisions of the load line acts, or the 
regulations in this subchapter will be subject to the penalties as set 
forth in law, and the vessel shall also be liable therefor. Depending 
upon the gravity of the violations, the Coast Guard may do any one or 
more of the following:
    (1) Detain a vessel if deemed to be overloaded in violation of title 
46, United States Code, section 86g or 88c in accordance with section 
86h or 88f, and have the vessel surveyed by three disinterested 
surveyors.
    (2) Assess and collect applicable monetary penalties for certain 
violations as provided in title 46, United States Code, sections 86i and 
88g.
    (3) Initiate a criminal prosecution for certain violations when 
required by title 46, U.S. Code, section 86i or 88g.
    (4) Initiate an action of libel against the vessel involved if there 
is a failure to pay monetary penalties assessed.
    (5) Initiate a suspension or revocation proceeding, in addition to 
the foregoing actions described in this paragraph against any officer or 
seaman holding a valid Coast Guard license or merchant mariner's 
document and who may violate any provision of the load line acts, the 
1966 Convention, or the regulations in this subchapter, under the 
provisions of title 46, United States Code, section 239, and the 
regulations prescribed thereunder in part 137 of subchapter K (Marine 
Investigations

[[Page 19]]

and Suspension and Revocation Proceedings) of this chapter.
    (c) In determining offenses the provisions of title 46, United 
States Code, sections 86i and 88g, both provide that ``Each day a vessel 
is in violation of this act shall constitute a separate offense.''
    (d) The procedures governing the assessment, collection, remission 
and litigation of any monetary penalty proposed under title 46, United 
States Code, section 86i or 88g for a violation of either load line law 
or the applicable regulations in this subchapter, as well as the appeal 
procedures to be allowed, are in 33 CFR subpart 1.07.

[CGFR 68-60, 33 FR 10054, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969; CGD 80-120, 47 FR 5722, Feb. 8, 1982]



Sec. 42.07-55   Cancellation of load line certificates or exemption certificates.

    (a) Since vessels described in Sec. 42.03-5 or Sec. 42.03-10 when 
found qualified are issued appropriate load line certificates or load 
line exemption certificates, under U.S. responsibility as indicated in 
Sec. 42.07-45 such certificates may be canceled by proper U.S. authority 
for due cause, including one or more of the causes listed in paragraph 
(b) of this section. Such action may occur prior to the expiration date 
on the certificate and normal certificate surrender. The cancellation of 
such certificate means that the correctness of load line marks and 
compliance with conditions of assignment for the named vessel no longer 
are recognized by the United States and that the existing assigned load 
line marks are voided.
    (b) Certain causes for automatic cancellation of certificates are:
    (1) The conditions of assignment have not been maintained as 
required by this subchapter.
    (2) Material alterations have taken place in the hull or 
superstructure of the vessel, which will necessitate the assignment of 
an increased freeboard.
    (3) The fittings and appliances have not been maintained in an 
effective condition for the protection of openings, guardrails, freeing 
ports, and means of access to crew's quarters.
    (4) The structural strength of the vessel is lowered to such an 
extent that the vessel is unsafe.
    (5) The load line certificate or International Load Line Exemption 
Certificate is not endorsed to show the vessel has been surveyed 
annually or periodically by the issuing authority as required by this 
part or the 1966 Convention.
    (6) Issuance of a new load line certificate for the same vessel.
    (7) Surrender of a certificate for cancellation when required.
    (8) The owner, master, or agent of the vessel has furnished false or 
fraudulent information in or with the application for a certificate.

[CGFR 68-60, 33 FR 10054, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969]



Sec. 42.07-60   Control.

    (a) The District Director of Customs or the Coast Guard District 
Commander may detain a vessel for survey if there is reason to believe 
that the vessel is proceeding on her journey in excess of the draft 
allowed by the regulations in this subchapter as indicated by the 
vessel's load line certificate, or otherwise. The Coast Guard District 
Commander may detain a vessel if it is so loaded as to be manifestly 
unsafe to proceed to sea.
    (b) If the District Director of Customs orders a vessel detained, he 
shall immediately inform the Coast Guard District Commander thereof, who 
shall thereupon advise the District Director of Customs whether or not 
he deems that the vessel may proceed to sea with safety. If the Coast 
Guard District Commander orders a vessel detained, such officer will 
furnish the District Director of Customs immediate notification of such 
detention. The clearance shall be refused to any vessel which shall have 
been ordered detained, which shall be in effect until it is shown that 
the vessel is not in violation of the applicable law and the regulations 
in this subchapter.
    (1) Where a vessel is detained for noncompliance with ``material 
alteration'' and ``effective maintenance'' requirements of paragraph 
(f)(1) of this section, the detention shall only be exercised insofar as 
may be necessary to

[[Page 20]]

ensure that the vessel can proceed to sea without danger to passengers 
or crew.
    (c) The detention of a vessel will be by written order of either the 
Coast Guard District Commander or the District Director of Customs, 
depending on who orders the detention. The Coast Guard District 
Commander will immediately arrange for a survey in the manner prescribed 
by section 7 of the load line acts. Unless the owner or agent waives in 
writing and stipulates to accept the Coast Guard's survey, the Coast 
Guard District Commander shall appoint three disinterested surveyors 
and, where practicable, one of them shall be from the Surveying Staff of 
the American Bureau of Shipping. Such surveyors shall conduct a survey 
to ascertain whether or not the vessel is loaded in violation of the 
applicable provisions in the load line acts, and the regulations in this 
subchapter. If the survey confirms the allegation that the vessel is in 
violation of either law or the applicable regulations in this 
subchapter, ``the owner and agent shall bear the costs of the survey in 
addition to any penalty or fine imposed'', as provided in these laws.
    (d) Whenever a vessel is detained, the master or owner may, within 5 
days, appeal to the Commandant who may, if he desires, order a further 
survey, and may affirm, set aside, or modify the order of the detaining 
officer.
    (e) Where a foreign vessel is detained or intervention action of any 
other kind is taken against a foreign vessel, the officer carrying out 
the action shall immediately inform in writing the Consul or the 
diplomatic representative of the State whose flag the vessel is flying, 
of the decision involved together with all pertinent circumstances under 
which intervention was deemed necessary.
    (f) Under sections 5 of the load line acts a vessel of a foreign 
country which has ratified the 1966 Convention, or which holds a 
recognized and valid 1930 Convention certificate, or which holds a valid 
Great Lakes Certificate, shall be exempt from the provisions of the 
regulations in this subchapter insofar as the marking of the load lines 
and the certificating thereof are concerned, so long as such country 
similarly recognizes the load lines established by this subchapter for 
the purpose of a voyage by sea subject to the proviso in paragraph 
(f)(1) of this section or the alternative proviso in paragraph (f)(2) of 
this section.
    (1) If the foreign vessel is marked with load lines and has on board 
a valid International or Great Lakes Load Line Certificate certifying to 
the correctness of the marks, the control provisions in this part which 
are in accord with Article 21 of the 1966 Convention shall be observed. 
In this connection, the vessel shall not be loaded beyond the limits 
allowed by the certificate. The position of the load lines on the vessel 
shall correspond with the certificate. The vessel shall not have been so 
materially altered as to make the vessel manifestly unfit to proceed to 
sea without danger to human life, in regard to:
    (i) The hull or superstructure (if necessitating assignment of an 
increased freeboard); and/or,
    (ii) The appliances and fittings for protection of openings, 
guardrails, freeing ports, and means of access to crew's quarters (if 
necessitating replacement or other effective maintenance).
    (2) (Alternatively provided) If the foreign vessel has on board an 
International Load Line Exemption Certificate in lieu of an 
International Load Line Certificate, 1966, in such case, verify that it 
is valid and any conditions stipulated therein are met.
    (g) A foreign vessel of a nation for which the 1966 Convention has 
not come into force does not qualify for an International Load Line 
Certificate, 1966. In lieu thereof, such a vessel shall be required to 
have on board a valid Form B load line certificate or a recognized 1930 
Convention certificate.

[CGFR 68-60, 33 FR 10055, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969]



Sec. 42.07-75  Right of appeal.

    Any person directly affected by a decision or action taken under 
this subchapter, by or on behalf of the Coast

[[Page 21]]

Guard, may appeal therefrom in accordance with subpart 1.03 of this 
chapter.

[CGD 88-033, 54 FR 50380, Dec. 6, 1989]



 Subpart 42.09--Load Line Assignments and Surveys--General Requirements



Sec. 42.09-1   Assignment of load lines.

    (a) The assignment of load lines is conditioned upon the structural 
efficiency and satisfactory stability of the vessel, and upon the 
provisions provided on the vessel for her effective protection and that 
of the crew. Certain vessels, such as vessels carrying all their cargo 
as deck cargo, or vessels where design or service require special 
conditions to be applicable, shall have certain stability limitations 
imposed on them, as may be necessary. When stability limitations for a 
vessel are prescribed, the assigning authority shall furnish the master 
the vessel's maximum draft permitted and other conditions, including 
reference to Commandant approved operating stability features, which may 
be applicable.
    (1) No load line assignment shall be made under this part to a 
vessel proceeding on a foreign voyage, or where the load line assignment 
is related to the flooded stability provisions and the vessel is 
proceeding on a domestic voyage, until the applicable light ship 
characteristics are established and incorporated into the vessel's 
stability data approved by the Commandant and furnished to the master of 
the vessel.
    (2) If load line assignments are made to vessels for coastwise 
voyages before the results of the required stability characteristics are 
determined and incorporated into the vessel's stability data approved by 
the Commandant, then such load line assignments shall be regarded as 
conditional and shall be subject to verification or modification for 
removal of the conditional status. Any vessel with a conditional load 
line assignment shall not be loaded beyond a conservative safe draft. 
Where the Commandant deems it unnecessary, the requirement for 
furnishing stability information to the masters of coastwise vessels 
assigned load lines not related to flooded stability may be omitted and 
the assigning authority and others concerned will be so notified.
    (b) Each vessel subject to load line requirements shall carry on 
board a valid certificate attesting to compliance with such 
requirements. (See Secs. 42.07-35 and 42.07-40 for additional data 
furnished to the vessel.)
    (c) The master of the vessel for which a load line certificate has 
been issued shall be responsible for the maintenance of such certificate 
on board such vessel and for compliance with its terms and conditions. 
Additionally, the master shall be responsible for having the current 
load line survey report on board the vessel. This report shall be made 
available to surveyors when carrying out subsequent load line surveys.

[CGFR 68-60, 33 FR 10055, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969]



Sec. 42.09-5  All vessels--division into types.

    (a) For the purposes of this part, each vessel to which this part 
applies is either a Type ``A'' or a Type ``B'' vessel.
    (b) A Type ``A'' vessel is a vessel that--
    (1) Is designed to carry only liquid cargoes in bulk;
    (2) Has a high degree of watertight and structural integrity of the 
deck exposed to the weather, with only small openings to cargo 
compartments that are closed by watertight gasketed covers of steel or 
other material considered equivalent by the Commandant; and
    (3) Has a low permeability of loaded cargo compartments.
    (c) A Type ``B'' vessel is any vessel that is not a Type ``A'' 
vessel.
    (d) Requirements governing the assignment of freeboards for Types 
``A'' and ``B'' vessels are in subparts 42.20 and 42.25 of this part.

[CGD 79-153, 48 FR 38647, Aug. 25, 1983]



Sec. 42.09-10   Stability, subdivision, and strength.

    (a) All vessels. Where regulations in this part, or in part 46 of 
this subchapter, require or permit load line assignment on the basis of 
the vessel's ability to meet specified flooding, including damage 
stability requirements,

[[Page 22]]

the owner shall furnish the necessary plans and calculations 
demonstrating that the vessel is in compliance with the applicable 
requirements. This material shall be furnished to the assigning 
authority for approval review at the earliest practicable date except 
where specifically required by part 46 of this subchapter for passenger 
vessels to be submitted to the Commandant for approval.
    (1) When stability information is required, the plans shall include 
the location and extent of all watertight subdivision bulkheads, etc., 
involved.
    (2) Additional stability, subdivision, and strength requirements are 
in Secs. 42.09-1, 42.13-1, 42.13-5, and 42.15-1. The applicable flooded 
stability requirements are in Secs. 42.20-3 through 42.20-13.
    (b) Passenger vessels. In passenger vessels where the positions of 
the maximum load lines is subject to determination by the application of 
subdivision and stability requirements in this subchapter, the 
provisions of both parts 42 and 46 shall be accounted for and developed 
as necessary. See subchapter H (Passenger Vessels) of this chapter for 
related data required to be submitted to the Commandant.
    (c) Light ship data. All plans, etc., necessary for obtaining the 
Commandant's approval of test results (light ship data) and stability 
information shall be furnished by the owner. In the absence of existing 
acceptable light ship stability information, such data shall be obtained 
from a stability test performed under the supervision of the Commandant. 
Results of such tests, if satisfactory, will be approved by the 
Commandant.

[CGFR 68-60, 33 FR 10056, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969; CGD 79-153, 48 FR 38647, Aug. 25, 1983]



Sec. 42.09-15   Surveys by the American Bureau of Shipping or assigning authority.

    (a) General. Before issuing a certificate or placement of load line 
marks on a vessel, the assigning and issuing authority shall make an 
initial or periodic survey of the vessel as required by this subchapter. 
A load line survey report shall be made, reflecting information and 
facts based on initial surveys, including required and special elements 
as may be deemed necessary by the assigning authority or the Commandant.
    (b) Initial survey. An initial survey shall be made before the 
vessel is put in service or the first time the assigning authority is 
requested to survey a vessel. The survey shall include a complete 
examination of its structure and equipment insofar as required by the 
applicable requirements in this subchapter. This survey shall be such as 
to ensure that the arrangements, materials, scantlings, and subsequent 
placement of load line marks fully comply with applicable requirements.
    (c) Periodical survey. A periodical survey shall be made at 
intervals not exceeding five (5) years from an initial or previous 
periodic survey. The survey shall be similar to the initial survey 
insofar as extent and purpose are concerned.
    (1) If the load line marks are found to be correct for the condition 
the vessel is then in, the assigning and issuing authority shall issue a 
new load line certificate, valid for such time as the condition of the 
vessel then warrants but in no case for a period of longer than 5 years. 
If, after a survey has been passed, a loadline certificate can not be 
issued before the current certificate expires, the current certificate 
may be extended by an endorsement in accordance with the requirements 
contained in Sec. 42.07-45(d). This endorsement of the assigning 
authority shall be placed on the back of the certificate, as shown on 
the forms in subpart 42.50. However, if there have been alterations 
which affect the vessel's freeboards, such extension shall not be 
granted. This prohibition is the same as in Article 19(2) of the 1966 
Convention.
    (2) The periodical survey, including certificate extension or 
reissue, for a vessel holding an international load line exemption 
certificate for more than one voyage, shall be the same as for any other 
vessel covered by this section except for load line marks. However, 
other conditions specified in the exemption certificate shall be 
verified.
    (d) Annual surveys for endorsements. Vessels subject to initial and 
periodic surveys shall have annual surveys,

[[Page 23]]

within 3 months either way of the certificate's anniversary date. The 
annual surveys shall be made by and prove satisfactory to the assigning 
and issuing authority prior to executing the required annual 
endorsements on load line certificates or exemption certificates. The 
scope shall be as defined in Sec. 42.09-40 and such as to ensure that 
the applicable load line marks are found to be correct for the condition 
the vessel is then in.

[CGFR 68-60, 33 FR 10056, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9012, June 5, 1969; CGD 73-49R, 38 FR 12290, May 10, 1973]



Sec. 42.09-20   Surveys of foreign vessels.

    (a) General. Foreign vessels of countries which have not ratified or 
acceded to the 1966 Convention, or which do not have valid certificates 
issued under other international convention or treaty and recognized by 
the United States of America, if desiring to depart from a port or place 
in the United States, the Commonwealth of Puerto Rico, the Territory of 
Guam, or other U.S. possessions, shall be subjected to survey, marking, 
and certification by a load line assigning and issuing authority as 
authorized under Sec. 42.07-35 or Sec. 42.07-40, unless:
    (1) The vessel is exempted by the provision of section 8 of the 
International Load Line Act of 1973, as amended (46 U.S.C. 86f); or
    (2) The vessel is under tow and carrying neither passengers nor 
cargo.
    (b) Scope of survey. A periodical survey described in Sec. 42.09-
15(c) shall be conducted by and prove satisfactory to the assigning and 
issuing authority. It shall be made prior to issue or reissue of the 
applicable certificate.
    (c) Certification of load lines. The assigning and issuing authority 
after determining the vessel meets the applicable requirements in this 
part may issue a load line certificate subject to requirements in 
Sec. 42.07-45 and on the applicable form described in subpart 42.50 of 
this part: Provided, That the load line certificate issued shall be 
valid for a period of 1 year. The certificate may be revalidated by 
endorsement for additional 1 year periods if the condition of the vessel 
so warrants, but in any event the certificate shall become void five (5) 
years from date of issue, or at the expiration of the fourth (4th) 
yearly validation, whichever occurs first. Whenever the condition of the 
vessel warrants special limitations, such information and facts shall be 
attested to on the front or back of the certificate as necessary, by the 
assigning and issuing authority.

[CGFR 68-60, 33 FR 10056, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969; CGD 80-120, 47 FR 5723, Feb. 8, 1982]



Sec. 42.09-25   Initial or periodic survey requirements for all vessels.

    (a) Before a survey may be completed, the vessel shall be placed in 
a drydock or hauled out. The surveyor shall be given complete access to 
all parts of the vessel to ensure that the vessel complies with all 
applicable requirements.
    (b) The surveyor shall examine on all vessels the items, etc., 
listed in this paragraph to determine if in satisfactory condition and 
meeting applicable requirements in this subchapter.
    (1) Cargo hatch coamings, covers, beams and supports, gaskets, 
clamps, locking bars, tarpaulins, battens, cleats and wedges of hatches 
on exposed freeboard, quarter and superstructure decks, and elsewhere as 
may be necessary.
    (2) Structure of the vessel, coamings, closures, and all means of 
protection provided for openings, such as for ventilators, 
companionways, machinery casings, fiddleys, funnels, enclosed 
superstructures on the freeboard deck (and their end bulkheads) or 
equivalent protective deck houses, openings in the freeboard and 
superstructure decks, and significant openings at higher levels in the 
vessel.
    (3) Transverse watertight subdivision bulkheads, as fitted, 
including any openings therein and closures for such openings. They 
shall be examined throughout their vertical and transverse extent.
    (4) All air-pipe outlets, their closures, all scuppers, and all 
sanitary discharges in the vessel's sides, including nonreturn valves 
installed.
    (5) The main and auxiliary sea inlets and discharges in the 
machinery space, and elsewhere if existent, and the valves and controls 
for these items.

[[Page 24]]

    (6) All gangways, cargo ports, and airports, including dead covers 
or other similar openings in the vessel's sides and their closures.
    (7) All guardrails, bulwarks, gangways, and freeing port shutters, 
including securing devices, and bars.
    (8) All eye plates or similar fittings for timber (or other) deck-
cargo lashings, including the lashings, sockets for uprights and 
protective devices as may be necessary for ventilators and steering 
arrangements.

[CGFR 68-60, 33 FR 10056, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.09-30   Additional survey requirements for steel-hull vessels.

    (a) In addition to the requirements in Sec. 42.09-25, the surveyor 
of the assigning authority shall examine the items, etc., listed in this 
section, to determine if in satisfactory condition and meeting 
applicable requirements in this subchapter.
    (b) When the vessel is in drydock, the hull plating, etc., shall be 
examined.
    (c) The holds, 'tween decks, peaks, bilges, machinery spaces, and 
bunkers shall be examined to determine the condition of the framing, 
etc.
    (d) The deep tanks and other tanks which form part of the vessel 
shall be examined internally.
    (e) If a double bottom is fitted, the tanks normally shall be 
examined internally. Where double bottom and other tanks are used for 
fuel-oil bunkers, such tanks need not be cleaned out, if the surveyor is 
able to determine by an external examination that their general 
condition is satisfactory.
    (f) The deck shall be examined.
    (g) Where, owing to the age and condition of the vessel or 
otherwise, the surveyor deems it necessary, the shell and deck plating 
may be required to be drilled or other acceptable means used, in order 
to ascertain the then thickness of such plating.

[CGFR 68-60, 33 FR 10057, July 12, 1968]



Sec. 42.09-35   Additional survey requirements for wood-hull vessels.

    (a) In addition to the requirements in Sec. 42.09-25, the surveyor 
of the assigning authority shall examine the items, etc., listed in this 
section, to determine if in satisfactory condition and meeting the 
applicable requirements in this subchapter.
    (b) When the vessel is in drydock or hauled out, the keel, stem, 
stern frame or sternpost, outside planking, and caulking shall be 
examined.
    (c) The fasteners shall be examined. Bolts, screws, or equivalent 
fastenings, as deemed necessary by the surveyor, must be backed out, or 
otherwise dealt with, to ensure soundness.
    (d) The holds, 'tween decks, peaks, bilges, machinery spaces, and 
bunkers shall be examined.
    (e) The entire structure, including decks, shall be examined. If 
considered necessary by the surveyor, borings shall be made, or other 
means may be used, to ascertain the condition of the materials. Should 
these measures disclose sufficient cause, further examination to satisfy 
the surveyor as to the true condition shall be made and check locations 
listed. This list shall be submitted to the assigning and issuing 
authority for record purposes, and for use in subsequent surveys.

[CGFR 68-60, 33 FR 10057, July 12, 1968]



Sec. 42.09-40   Annual surveys.

    (a) Relative to Secs. 42.09-15(d) and 42.09-20(c), the assigning and 
issuing authority shall make an annual survey of each vessel holding an 
appropriate certificate issued under this subchapter.
    (b) The annual survey shall be of such scope and extent so as to 
ensure:
    (1) The maintenance in an effective condition of the fittings and 
appliances for the:
    (i) Protection of openings;
    (ii) Guardrails;
    (iii) Freeing ports; and,
    (iv) Means of access to crew's quarters.
    (2) That there have not been alterations made to the hull or 
superstructure which would affect the calculations determining the 
position of the load line marks.
    (c) The assigning and issuing authority shall report on the annual 
survey made to the owner of the vessel.

[CGFR 68-60, 33 FR 10057, July 12, 1968 as amended by CGD 80-143, 47 FR 
25149, June 10, 1982]

[[Page 25]]



Sec. 42.09-45  Correction of deficiencies.

    (a) During and after any survey made by the assigning and issuing 
authority, those items, fittings, etc., which are found to be in an 
unsatisfactory condition by the surveyor shall be repaired or renewed in 
order to place the vessel in a satisfactory condition.
    (b) No load line certificate shall be issued, endorsed, extended, or 
reissued or delivered to a vessel subject to this subchapter until after 
unsatisfactory conditions have been corrected as required by paragraph 
(a) of this section.

[CGFR 68-60, 33 FR 10057, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.09-50   Repairs or alterations to vessel after it has been surveyed.

    (a) After any survey of the vessel made under Secs. 42.09-25 to 
42.09-40, inclusive, as applicable, has been completed and deficiencies 
corrected as provided in Sec. 42.09-45, no change shall be made in the 
vessel's structure, equipment, arrangement, material, or scantlings as 
covered by such survey, without the prior specific approval of the 
assigning and issuing authority.
    (b) To avoid a freeboard or other penalty, any vessel which 
undergoes repairs, alterations, or modifications, including outfitting 
related thereto, shall continue to comply with the applicable 
requirements consistent with the load line certificate held.
    (c) An existing vessel, which had a load line assigned under 
previous regulations which undergoes repairs, alterations, or 
modifications of a major character, shall meet the requirements for a 
new vessel in this part insofar as the assigning and issuing authority 
and the Commandant deem reasonable and practicable.

[CGFR 68-60, 33 FR 10057, July 12, 1968, as amended by CGD 80-120, 47 FR 
5723, Feb. 8, 1982]



  Subpart 42.11--Applications for Load Line Assignments, Surveys, and 
                              Certificates



Sec. 42.11-1   General.

    (a) As described in this subchapter under Secs. 42.07-35, 42.07-40, 
42.09-15, and 42.09-20, the American Bureau of Shipping or other 
recognized classification societies approved as load line assigning and 
issuing authorities perform the duties connected with making load line 
assignments to vessels.
    (b) The Commandant is responsible for the administration of the load 
line acts, the 1966 Convention, other treaties regarding load lines, and 
the implementing regulations in this subchapter which include prescribed 
form and content of applicable load line certificates.
    (c) Except in special instances for Coast Guard vessels, the 
Commandant does not perform the duties of a load line assigning 
authority.

[CGFR 68-60, 33 FR 10057, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969; CGD 80-120, 47 FR 5723, Feb. 8, 1982]



Sec. 42.11-5   Applications for load line assignments, surveys, and certificates for U.S.-flag vessels.

    (a) Normally, the owner, master, or agent of a vessel shall apply in 
writing, on a timely basis, to the American Bureau of Shipping for the 
assignment, survey, and certification of load lines. When nonconcurrent, 
a separate application shall be made for each function desired and 
submitted on a timely basis. The mailing address of the home office of 
American Bureau of Shipping is Two World Trade Center, 106th Floor, New 
York, NY 10048.
    (b) After the Commandant has approved a recognized classification 
society as a load line assigning and issuing authority for a vessel, as 
described in a written request of the shipowner, the owner shall apply 
in writing, on a timely basis, direct to the approved assigning and 
issuing authority for the assignment, survey, and certification of load 
lines. When nonconcurrent, a separate application shall be made to such 
authority for each function desired, and submitted on a timely basis.

[CGFR 68-60, 33 FR 10057, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969; CGD 96-041, 61 FR 50727, Sept. 27, 1996]



Sec. 42.11-10   Applications for load line assignments and certificates for vessels other than U.S.-flag vessels.

    (a) The application for the assignment of load lines and certificate 
for a foreign vessel belonging to (or which

[[Page 26]]

will belong to) either a country ratifying or acceding to the 
International Convention on Load Lines, 1966, or to a country with which 
the United States of America has a reciprocal load line agreement in 
effect shall be made by the Government whose flag the vessel flies, or 
will fly. The application may be made direct to the American Bureau of 
Shipping, or after receiving the Commandant's approval, to a recognized 
classification society which that country has requested as an assigning 
and issuing authority. When the load line assignment and certificate are 
authorized pursuant to the requirements in this part, the certificate 
must contain a statement that it has been issued at the request of a 
specific Government, which shall be named therein.
    (1) When the load line assignment is performed under the applicable 
regulations in this subchapter, the assigning and issuing authority 
shall transmit to the requesting Government at the earliest practicable 
date, one copy of each certificate issued, the load line survey report 
used for computing the freeboard, and the freeboard computations. For 
information, the assigning and issuing authority shall also notify the 
Commandant of the names of the vessel and the Government involved and 
the date and place where the work was done.
    (b) For a foreign vessel of a country not included in paragraph (a) 
of this section, the owner, master, or agent normally shall apply in 
writing to the American Bureau of Shipping, or to any other recognized 
assigning and issuing authority after it has been approved by the 
Commandant, for the assignment, survey, and certification of load lines, 
or for reissue of a load line certificate, as may be necessary for the 
vessel to clear ports of the United States, the Commonwealth of Puerto 
Rico, the Territory of Guam, or other U.S. possessions. Normally the 
same requirements, conditions, procedures, distribution of applicable 
certificates, etc., shall be applied to such foreign vessels which are 
applied to similar U.S.-flag vessels of 150 gross tons or over.

[CGFR 68-60, 33 FR 10058, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.11-15   Application for timber load lines.

    (a) The owner, master, or agent of a vessel having load lines 
assigned under this subchapter may apply to the assigning and issuing 
authority for timber load lines when making his application for a load 
line certificate. After the vessel has been found in compliance with the 
applicable requirements in this subchapter, it may be marked with timber 
load lines, which will also be certified to in the load line 
certificate.

[CGFR 68-60, 33 FR 10058, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.11-20   Application for annual survey.

    (a) The owner, master, or agent of a vessel holding a load line 
certificate shall apply to the assigning and issuing authority who 
issued the certificate for the annual survey required by Sec. 42.09-40 
or the International Convention on Load Lines, 1966.

[CGFR 68-60, 33 FR 10058, July 12, 1968]



         Subpart 42.13--General Rules for Determining Load Lines



Sec. 42.13-1   Assumptions.

    (a) The regulations in this part are based on the assumption that 
the nature and stowage of the cargo, ballast, etc., are such as will 
secure sufficient stability of the vessel and avoid excessive structural 
stress.
    (b) The regulations in this part are also based on the assumption 
that, where there are other international requirements relating to 
stability or subdivision applicable to vessels, these requirements have 
been met.

[CGFR 68-60, 33 FR 10058, July 12, 1968]



Sec. 42.13-5   Strength of vessel.

    (a) The assigning and issuing authority shall satisfy itself that 
the general structural strength of the vessel is sufficient for the 
draft corresponding to the freeboard assigned, and when requested shall 
furnish pertinent strength information to the Commandant.

[[Page 27]]

    (b) Vessels built and maintained in conformity with the requirements 
of a classification society recognized by the Commandant are considered 
to possess adequate strength for the purpose of the applicable 
requirements in this subchapter unless deemed otherwise by the 
Commandant.

[CGFR 68-60, 33 FR 10058, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.13-10   Freeboards assigned vessels.

    (a) Vessels with mechanical means of propulsion, or lighters, 
barges, or other vessels without independent means of propulsion, shall 
be assigned freeboards in accordance with the provisions of Secs. 42.13-
1 to 42.20-75, inclusive.
    (b) Vessels carrying timber deck cargoes may be assigned, in 
addition to the freeboards required by paragraph (a) of this section, 
timber freeboards in accordance with the provisions of Secs. 42.25-1 to 
42.25-20, inclusive.
    (c) Vessels designed to carry sail, whether as the sole means of 
propulsion or as a supplementary means, and tugs, shall be assigned 
freeboards in accordance with the provisions of Secs. 42.13-1 to 42.20-
75, inclusive, and such additional freeboards as determined necessary by 
the Commandant under the procedure of paragraph (f) of this section.
    (d) Vessels of wood or of composite construction, or of other 
materials the use of which the Commandant has approved, or vessels whose 
constructional features are such as to render the application of the 
provisions of Secs. 42.13-1 to 42.25-20 unreasonable or impracticable, 
shall be assigned freeboards as determined necessary by the Commandant 
under the procedure of paragraph (f) of this section.
    (e) The requirements in Secs. 42.15-1 to 42.15-80, inclusive, shall 
apply to every vessel to which a minimum freeboard is assigned. 
Relaxations from these requirements may be granted to a vessel to which 
a greater than minimum freeboard is assigned provided the safety 
conditions of the vessel are determined to be satisfactory under 
paragraph (f) of this section.
    (f) In each case specified by paragraphs (c) to (e) inclusive of 
this section, the assigning authority shall report to the Commandant the 
specific matters in which the vessel is deficient or requires special 
freeboard consideration due to design, arrangement, construction 
materials, propulsive method, or relaxation of requirements in this 
part. The report shall also furnish background data and recommendations 
of the assigning authority (including freeboard additions), as will 
enable the Commandant to reach a decision.

[CGFR 68-60, 33 FR 10058, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969]



Sec. 42.13-15   Definitions of terms.

    (a) Length. The length (L) shall be taken as 96 percent of the total 
length on a waterline at 85 percent of the least molded depth measured 
from the top of the keel, or as the length from the foreside of the stem 
to the axis of the rudder stock on that waterline, if that be greater. 
In vessels designed with a rake of keel the waterline on which this 
length is measured shall be parallel to the designed waterline.
    (b) Perpendiculars. The forward and after perpendiculars shall be 
taken at the forward and after ends of the length (L). The forward 
perpendicular shall coincide with the foreside of the stem on the 
waterline on which the length is measured.
    (c) Amidships. Amidships is at the middle of the length (L).
    (d) Breadth. Unless expressly provided otherwise, the breadth (B) is 
the maximum breadth of the vessel, measured amidships to the molded line 
of the frame in a vessel with a metal shell and to the outer surface of 
the hull in a vessel with a shell of any other material.
    (e) Molded depth. (1) The molded depth is the vertical distance 
measured from the top of the keel to the top of the freeboard deck beam 
at side. In wood and composite vessels the distance is measured from the 
lower edge of the keel rabbet. Where the form at the lower part of the 
midship section is of a hollow character, or where thick garboards are 
fitted, the distance is measured from the point where the line of the 
flat of the bottom continued inwards cuts the side of the keel.

[[Page 28]]

    (2) In vessels having rounded gunwales, the molded depth shall be 
measured to the point of intersection of the molded lines of the deck 
and sides, the lines extending as though the gunwale were of angular 
design.
    (3) Where the freeboard deck is stepped and the raised part of the 
deck extends over the point at which the molded depth is to be 
determined, the molded depth shall be measured to a line of reference 
extending from the lower part of the deck along a line parallel with the 
raised part.
    (f) Depth for freeboard (D). (1) The depth for freeboard (D) is the 
molded depth amidships, plus the thickness of the freeboard deck 
stringer plate, where fitted, plus

                                T(L-S)/L

if the exposed freeboard deck is sheathed;

where:

  T is the mean thickness of the exposed sheathing clear of deck 
openings; and
  S is the total length of superstructures as defined in paragraph 
(j)(4) of this section.

    (2) The depth for freeboard (D) in a vessel having a rounded gunwale 
with a radius greater than 4 percent of the breadth (B) or having 
topsides of unusual form is the depth for freeboard of a vessel having a 
midship section with vertical topsides and with the same round of beam 
and area of topside section equal to that provided by the actual midship 
section.
    (g) Block coefficient. The block coefficient (Cb) is given by

                      Cb=/L.B.d1

where  is the volume of the molded displacement of the vessel, 
excluding bossing, in a vessel with a metal shell, and is the volume of 
displacement to the outer surface of the hull in a vessel with a shell 
of any other material, both taken at a molded draft of d1; and, 
d1 is 85 percent of the least molded depth.
    (h) Freeboard. The freeboard assigned is the distance measured 
vertically downward amidships from the upper edge of the deck line to 
the upper edge of the related load line.
    (i) Freeboard deck. (1) The freeboard deck is normally the uppermost 
complete deck exposed to weather and sea, which has permanent means of 
closing all openings in the weather part thereof, and below which all 
openings in the sides of the vessel are fitted with permanent means of 
watertight closing. In a vessel having a discontinuance freeboard deck, 
the lowest line of the exposed deck and the continuation of that line 
parallel to the upper part of the deck is taken as the freeboard deck. 
At the option of the owner and subject to the approval of the assigning 
authority a lower deck may be designated as the freeboard deck, provided 
it is a complete and permanent deck continuous in a fore and aft 
direction at least between the machinery space and peak bulkheads and 
continuous athwartships. When this lower deck is stepped the lowest line 
of the deck and the continuation of that line parallel to the upper part 
of the deck is taken as the freeboard deck.
    (2) When a lower deck is designated as the freeboard deck, that part 
of the hull which extends above the freeboard deck is treated as a 
superstructure so far as concerns the application of the conditions of 
assignment and the calculation of freeboard. It is from this deck that 
the freeboard is calculated.
    (j) Superstructure. (1) A superstructure is a decked structure on 
the freeboard deck, extending from side to side of the vessel or with 
the side plating not being inboard of the shell plating more than 4 
percent to the breadth. (B). A raised quarter deck is regarded as a 
superstructure.
    (2) An enclosed superstructure is a superstructure with:
    (i) Enclosing bulkheads of efficient construction;
    (ii) Access openings, if any in these bulkheads fitted with doors 
complying with the requirements of Sec. 42.15-10; and,
    (iii) All other openings in sides or ends of the superstructure 
fitted with efficient weathertight means of closing.

    Note: A bridge or poop shall not be regarded as enclosed unless 
access is provided for the crew to reach machinery and other working 
spaces inside the superstructures by alternative means, which are 
available at all times when bulkhead openings are closed.

    (3) The height of a superstructure is the least vertical height 
measured at side from the top of the superstructure

[[Page 29]]

deck beams to the top of the freeboard deck beams.
    (4) The length of a superstructure (S) is the mean length of the 
part of the superstructure which lies within the length (L).
    (k) Flush deck vessel. A flush deck vessel is one which has no 
superstructure on the freeboard deck.
    (l) Weathertight. Weathertight means that in any sea conditions 
water will not penetrate into the vessel.

[CGFR 68-60, 33 FR 10058, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9013, June 5, 1969; 43 FR 31928, July 24, 1978]



Sec. 42.13-20   Deck line.

    (a) The deck line is a horizontal line 12 inches in length and 1 
inch in breadth. It shall be marked amidships on each side of the 
vessel, and its upper edge shall normally pass through the point where 
the continuation outwards of the upper surface of the freeboard deck 
intersects the outer surface of the shell (as illustrated in Figure 
42.13-20(a)), provided that the deck line may be placed with reference 
to another fixed point on the vessel on condition that the freeboard is 
correspondingly corrected. The location of the reference point and the 
identification of the freeboard deck shall in all cases be indicated on 
the International Load Line Certificate (1966), and, as applicable, on 
all other load line certificates issued pursuant to this part 42.
[GRAPHIC] [TIFF OMITTED] TC01FE91.000

                     Figure 42.13-20(a)--Deck line.

[CGFR 68-60, 33 FR 10059, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.13-25   Load line mark.

    (a) The load line mark shall consist of a ring 12 inches in outside 
diameter and 1 inch wide which is intersected by a horizontal line 18 
inches in length and 1 inch in breadth, the upper edge of which passes 
through the center of the ring. The center of the ring shall be placed 
amidships and at a distance equal to the assigned summer freeboard 
measured vertically below the upper edge of the deck line (as 
illustrated in Figure 42.13-25(a)).
[GRAPHIC] [TIFF OMITTED] TC01FE91.001

 Figure 42.13-25(a)--Load line mark and lines to be used with this mark.

[CGFR 68-60, 33 FR 10059, July 12, 1968]



Sec. 42.13-30   Lines to be used with the load line mark.

    (a) The lines which indicate the load line assigned in accordance 
with the regulations in this part shall be horizontal lines 9 inches in 
length and 1 inch in breadth which extend forward of, unless expressly 
provided otherwise, and at right angles to, a vertical line 1 inch in 
breadth marked at a distance 21 inches forward of the center of the ring 
(as illustrated in Figure 42.13-25(a)).
    (b) The following load lines shall be used:
    (1) The summer load line indicated by the upper edge of the line 
which passes through the center of the ring and also by a line marked S.
    (2) The winter load line indicated by the upper edge of a line 
marked W.
    (3) The winter North Atlantic load line indicated by the upper edge 
of a line marked WNA.
    (4) The tropical load line indicated by the upper edge of a line 
marked T.
    (5) The fresh water load line in summer indicated by the upper edge 
of a line marked F. The fresh water load line in summer is marked abaft 
the vertical line. The difference between the fresh water load line in 
summer and the summer load line is the allowance to be made for loading 
in fresh water at the other load lines.
    (6) The tropical fresh water load line indicated by the upper edge 
of a line

[[Page 30]]

marked TF, and marked abaft the vertical line.
    (c) If timber freeboards are assigned, the timber load lines shall 
be marked in addition to ordinary load lines. These lines shall be 
horizontal lines 9 inches in length and 1 inch in breadth which extend 
abaft unless expressly provided otherwise, and are at right angles to, a 
vertical line 1 inch in breadth marked at a distance 21 inches abaft the 
center of the ring (as illustrated in Figure 42.13-30(c)).
[GRAPHIC] [TIFF OMITTED] TC01FE91.002

Figure 42.13-30(c)--Timber load line mark and lines to be used with this 
                                  mark.

    (d) The following timber load lines shall be used:
    (1) The summer timber load line indicated by the upper edge of a 
line marked LS.
    (2) The winter timber load line indicated by the upper edge of a 
line marked LW.
    (3) The winter North Atlantic timber load line indicated by the 
upper edge of a line marked LWNA.
    (4) The tropical timber load line indicated by the upper edge of a 
line marked LT.
    (5) The fresh water timber load line in summer indicated by the 
upper edge of a line marked LF and marked forward of the vertical line.

    Note: The difference between the fresh water timber load line in 
summer and the summer timber load line is the allowance to be made for 
loading in fresh water at the other timber load lines.

    (6) The tropical fresh water timber load line indicated by the upper 
edge of a line marked LTF and marked forward of the vertical line.
    (e) Where the characteristics of a vessel, or the nature of the 
vessel's service or navigational limits make any of the seasonal lines 
inapplicable, these lines may be omitted.
    (f) Where a vessel is assigned a greater than minimum freeboard so 
that the load line is marked at a position corresponding to, or lower 
than, the lowest seasonal load line assigned at minimum freeboard in 
accordance with the present Convention, only the fresh water load line 
need be marked.
    (g) On sailing vessels only the fresh water load line and the winter 
North Atlantic load line need be marked (as illustrated in Figure 42.13-
30(g)).
[GRAPHIC] [TIFF OMITTED] TC01FE91.003

  Figure 42.13-30(g)--Load line mark on sailing vessel and lines to be 
                          used with this mark.

    (h) Where a winter North Atlantic load line is identical with the 
winter load line corresponding to the same vertical line, this load line 
shall be marked W.
    (i) Additional load lines required by other international 
conventions in force may be marked at right angles to and abaft the 
vertical line specified in paragraph (a) of this section.

[CGFR 68-60, 33 FR 10059, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.13-35   Mark of assigning authority.

    (a) The mark of the assigning authority by whom the load lines are 
assigned may be indicated alongside the load line ring above the 
horizontal line which passes through the center of the ring, or above 
and below it. This mark shall consist of not more than four initials to 
identify the assigning

[[Page 31]]

authority's name, each measuring approximately 4\1/2\ inches in height 
and 3 inches in width.

[CGFR 68-60, 33 FR 10060, July 12, 1968]



Sec. 42.13-40   Details of marking.

    (a) The ring, lines and letters shall be painted in white or yellow 
on a dark ground or in black on a light ground. They shall also be 
permanently marked on the sides of the vessels to the satisfaction of 
the assigning authority. The marks shall be plainly visible and, if 
necessary, special arrangements shall be made for this purpose.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.13-45   Verification of marks.

    (a) The International Load Line Certificate (1966) shall not be 
delivered to the vessel until Sec. 42.07-5 has been fully complied with 
under the authority and provisions of subparts 42.07 and 42.09 of this 
part.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



          Subpart 42.15--Conditions of Assignment of Freeboard



Sec. 42.15-1   Information to be supplied to the master.

    (a) The master of every new vessel shall be supplied with sufficient 
information in a form approved by the assigning and issuing authority, 
to enable him to arrange for the loading and ballasting of his vessel in 
such a way as to avoid the creation of any unacceptable stresses in the 
vessel's structure: Provided, That this requirement need not apply to 
any particular length, design or class of vessel where the Commandant 
considers it to be unnecessary and so notifies the assigning and issuing 
authority.
    (b) The master of every new vessel, which is not already provided 
with stability information under an international convention for the 
safety of life at sea in force, shall be supplied with sufficient 
information in a form approved by the Commandant, to give him guidance 
as to the stability of the vessel under varying conditions of service, 
and a copy shall be furnished to the Commandant.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-5   Superstructure end bulkheads.

    (a) Bulkheads at exposed ends of enclosed superstructures shall be 
of efficient construction and shall be to the satisfaction of the 
assigning authority.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-10   Doors.

    (a) All access openings in bulkheads at ends of enclosed 
superstructures shall be fitted with doors of steel or other equivalent 
material, permanently and strongly attached to the bulkhead, and framed, 
stiffened and fitted so that the whole structure is of equivalent 
strength to the unpierced bulkhead and weathertight when closed. The 
means for securing these doors weathertight shall consist of gaskets and 
clamping devices or other equivalent means and shall be permanently 
attached to the bulkhead or to the doors themselves, and the doors shall 
be so arranged that they can be operated from both sides of the 
bulkhead.
    (b) Except as otherwise provided in these regulations, the height of 
the sills of access openings in bulkheads at ends of enclosed 
superstructures shall be at least 15 inches above the deck.

[CGFR 68-60, 33 FR 10060, July 12, 1968]



Sec. 42.15-15   Position of hatchways, doorways and ventilators.

    (a) For the purpose of this part two positions of hatchways, 
doorways and ventilators are defined as follows:
    (1) Position 1: Upon exposed freeboard and raised quarter decks, and 
upon exposed superstructure decks situated forward of a point located a 
quarter of the vessel's length from the forward perpendicular.

[[Page 32]]

    (2) Position 2: Upon exposed superstructure decks situated abaft a 
quarter of the vessel's length from the forward perpendicular.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-20   Cargo and other hatchways.

    (a) The construction and the means for securing the weathertightness 
of cargo and other hatchways in positions 1 and 2 shall be at least 
equivalent to the requirements of Secs. 42.15-25 and 42.15-30.
    (b) Coamings and hatchway covers to exposed hatchways on decks above 
the superstructure deck shall comply with the requirements of the 
assigning authority.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-25   Hatchways closed by portable covers and secured weathertight by tarpaulins and battening devices.

    (a) Hatchway coamings. (1) The coamings of hatchways closed by 
portable covers secured weathertight by tarpaulins and battening devices 
shall be of substantial construction, and their height above the deck 
shall be at least as follows:
    (i) 23\1/2\ inches if in position 1.
    (ii) 17\1/2\ inches if in position 2.
    (b) Hatchway covers. (1) The width of each bearing surface for 
hatchway covers shall be at least 2\1/2\ inches.
    (2) Where covers are made of wood, the finished thickness shall be 
at least 2\3/8\ inches in association with a span of not more than 4.9 
feet.
    (3) Where covers are made of mild steel, the strength shall be 
calculated with assumed loads not less than 358 pounds per square foot 
on hatchways in position 1, and not less than 266 pounds per square foot 
on hatchways in position 2, and the product of the maximum stress thus 
calculated and the factor 4.25 shall not exceed the minimum ultimate 
strength of the material. They shall be so designed as to limit the 
deflection to not more than 0.0028 times the span under these loads.
    (4) The assumed loads on hatchways in position 1 may be reduced to 
205 pounds per square foot for vessels of 79 feet in length and shall be 
not less than 358 pounds per square foot for vessels of 328 feet in 
length. The corresponding loads on hatchways in position 2 may be 
reduced to 154 pounds per square foot and 266 pounds per square foot 
respectively. In all cases values at intermediate lengths shall be 
obtained by linear interpolation.
    (c) Portable beams. (1) Where portable beams for supporting hatchway 
covers are made of mild steel the strength shall be calculated with 
assumed loads not less than 358 pounds per square foot on hatchways in 
position 1 and not less than 266 pounds per square foot on hatchways in 
position 2 and the product of the maximum stress thus calculated and the 
factor 5 shall not exceed the minimum ultimate strength of the material. 
They shall be so designed as to limit the deflection to not more than 
0.0022 times the span under these loads. For vessels of not more than 
328 feet in length the requirements of paragraph (b)(4) of this section 
are applicable.
    (d) Pontoon covers. (1) Where pontoon covers used in place of 
portable beams and covers are made of mild steel the strength shall be 
calculated with the assumed loads given in paragraph (b)(3) of this 
section, and the product of the maximum stress thus calculated and the 
factor 5 shall not exceed the minimum ultimate strength of the material. 
They shall be so designed as to limit the deflection to not more than 
0.0022 times the span. Mild steel plating forming the tops of covers 
shall be not less in thickness than 1 percent of the spacing of 
stiffeners or 0.24 inches if that be greater. For vessels of not more 
than 328 feet in length the requirements of paragraph (b)(4) of this 
section are applicable.
    (2) The strength and stiffness of covers made of materials other 
than mild steel shall be equivalent to those of mild steel to the 
satisfaction of the assigning authority.
    (e) Carriers or sockets. (1) Carriers or sockets for portable beams 
shall be of substantial construction, and shall provide means for the 
efficient fitting and securing of the beams. Where rolling

[[Page 33]]

types of beams are use, the arrangements shall ensure that the beams 
remain properly in position when the hatchway is closed.
    (f) Cleats. (1) Cleats shall be set to fit the taper of the wedges. 
They shall be at least 2\1/2\ inches wide and spaced not more than 23\1/
2\ inches center to center; the cleats along each side or end shall be 
not more than 6 inches from the hatch corners.
    (g) Battens and wedges. (1) Battens and wedges shall be efficient 
and in good condition. Wedges shall be of tough wood or other equivalent 
material. They shall have a taper of not more than 1 in 6 and shall be 
not less than \1/2\-inch thick at the toes.
    (h) Tarpaulins. (1) At least two layers of tarpaulin in good 
condition shall be provided for each hatchway in positions 1 and 2.
    (2) The tarpaulins shall be waterproof and of ample strength. They 
shall be of a material of at least a standard weight and quality as 
approved by the assigning and issuing authority.
    (i) Security of hatchway covers. (1) For all hatchways in position 1 
or 2, steel bars or other equivalent means shall be provided in order 
efficiently and independently to secure each section of hatchway covers 
after the tarpaulins are battened down. Hatchway covers of more than 4.9 
feet in length shall be secured by at least two such securing 
appliances.

[CGFR 68-60, 33 FR 10060, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-30   Hatchways closed by weathertight covers of steel or other equivalent material fitted with gaskets and clamping devices.

    (a) Hatchway coamings. At positions 1 and 2 the height above the 
deck of hatchway coamings fitted with weathertight hatch covers of steel 
or other equivalent material fitted with gaskets and clamping devices 
shall be as specified in Sec. 42.15-25(a)(1). The height of these 
coamings may be reduced, or the coamings omitted entirely, on condition 
that the assigning authority is satisfied that the safety of the vessel 
is not thereby impaired in any sea conditions. Where coamings are 
provided they shall be of substantial construction.
    (b) Weathertight covers. (1) Where weathertight covers are of mild 
steel the strength shall be calculated with assumed loads not less than 
358 pounds per square foot on hatchways in position 1, and not less than 
255 pounds per square foot on hatchways in position 2, and the product 
of the maximum stress thus calculated and the factor of 4.25 shall not 
exceed the minimum ultimate strength of the material. They shall be so 
designed as to limit the deflection to not more than 0.0028 times the 
span under these loads. Mild steel plating forming the tops of covers 
shall be not less in thickness than one percent of the spacing of 
stiffeners or 0.24 inches if that be greater. The provisions of 
Sec. 42.15-25(b)(4) are applicable for vessels of not more than 328 feet 
in length.
    (2) The strength and stiffness of covers made of materials other 
than mild steel shall be equivalent to those of mild steel to the 
satisfaction of the assigning authority.
    (c) Means for securing weathertightness. (1) The means for securing 
and maintaining weathertightness shall be to the satisfaction of the 
assigning authority.
    (2) The arrangements shall ensure that the tightness can be 
maintained in any sea conditions. For this purpose tests for tightness 
shall be required at the initial surveys, and may be required at 
periodical surveys and at annual surveys or at more frequent intervals.

[CGFR 68-60, 33 FR 10061, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-35   Machinery space openings.

    (a) Machinery space openings in position 1 or 2 shall be properly 
framed and efficiently enclosed by steel casings of ample strength, and 
where the casings are not protected by other structures their strength 
shall be specifically considered. Access openings in such casings shall 
be fitted with doors complying with the requirements of Sec. 42.15-
10(a), the sills of which shall be at least 23\1/2\ inches above the 
deck if in position 1, and at least 15 inches above the deck if in 
position 2. Other openings in such

[[Page 34]]

casings shall be fitted with equivalent covers, permanently attached in 
their proper positions.
    (b) Coamings of any fiddley, funnel, or machinery space ventilators 
in an exposed position on the freeboard or superstructure deck shall be 
as high above the deck as is reasonable and practicable. Fiddley 
openings shall be fitted with strong covers of steel or other equivalent 
material permanently attached in their proper positions and capable of 
being secured weathertight.

[CGFR 68-60, 33 FR 10061, July 12, 1968]



Sec. 42.15-40   Miscellaneous openings in freeboard and superstructure decks.

    (a) Manholes and flush scuttles in position 1 or 2 or within 
superstructures other than enclosed superstructures shall be closed by 
substantial covers capable of being made watertight. Unless secured by 
closely spaced bolts, the covers shall be permanently attached.
    (b) Openings in freeboard decks other than hatchways, machinery 
space openings, manholes, and flush scuttles shall be protected by an 
enclosed superstructure, or by a deckhouse or companionway of equivalent 
strength and weathertightness. Any such opening in an exposed 
superstructure deck or in the top of a deckhouse on the freeboard deck 
which gives access to a space below the freeboard deck or a space within 
an enclosed superstructure shall be protected by an efficient deckhouse 
or companionway. Doorways in such deckhouses or companionways shall be 
fitted with doors complying with the requirements of Sec. 42.15-10(a).
    (c) In position 1 the height above the deck of sills to the doorways 
in companionways shall be at least 23\1/2\ inches. In position 2 they 
shall be at least 15 inches.

[CGFR 68-60, 33 FR 10061, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-45   Ventilators.

    (a) Ventilators in position 1 or 2 to spaces below the freeboard 
decks or decks of enclosed superstructures shall have coamings of steel 
or other equivalent material, substantially constructed and efficiently 
connected to the deck. Where the coaming of any ventilator exceeds 35\1/
2\ inches in height it shall be specially supported.
    (b) Ventilators passing through superstructures other than enclosed 
superstructures shall have substantially constructed coamings of steel 
or other equivalent material at the freeboard deck.
    (c) Ventilators in position 1 the coamings of which extend to more 
than 14.8 feet above the deck, and in position 2 the coamings of which 
extend to more than 7.5 feet above the deck, need not be fitted with 
closing arrangements unless specifically required by the assigning 
authority.
    (d) Except as provided in paragraph (c) of this section ventilator 
openings shall be provided with efficient weathertight closing 
appliances. In vessels of not more than 328 feet in length the closing 
appliances shall be permanently attached; where not so provided in other 
vessels, they shall be conveniently stowed near the ventilators to which 
they are to be fitted. Ventilators in position 1 shall have coamings of 
a height of at least 35\1/2\ inches above the deck; in position 2 the 
coamings shall be of a height at least 30 inches above the deck.
    (e) In exposed positions, the height of coamings may be required to 
be increased to the satisfaction of the assigning authority.

[CGFR 68-60, 33 FR 10061, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-50   Air pipes.

    (a) Where air pipes to ballast and other tanks extend above the 
freeboard or superstructure decks, the exposed parts of the pipes shall 
be of substantial construction; the height from the deck to the point 
where water may have access below shall be at least 30 inches on the 
freeboard deck and 17\1/2\ inches on the superstructure deck. Where 
these heights may interfere with the working of the vessel, a lower 
height may be approved, provided the assigning authority is satisfied 
that the closing arrangements and other circumstances justify a lower 
height.

[[Page 35]]

Satisfactory means permanently attached, shall be provided for closing 
the openings of the air pipes.

[CGFR 68-60, 33 FR 10062, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-55   Cargo ports and other similar openings.

    (a) Cargo ports and other similar openings in the sides of vessels 
below the freeboard deck shall be fitted with doors so designed as to 
ensure watertightness and structural integrity commensurate with the 
surrounding shell plating, to the satisfaction of the assigning 
authority. The arrangements shall be subject to tightness tests at the 
initial survey and at such subsequent surveys or more frequent intervals 
as deemed necessary. The number of such openings shall be the minimum 
compatible with the design and proper working of the vessel.
    (b) Unless permitted by the Commandant the lower edge of such 
openings shall not be below a line drawn parallel to the freeboard deck 
at side, which has at its lowest point the upper edge of the uppermost 
load line.

[CGFR 68-60, 33 FR 10062, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-60   Scuppers, inlets, and discharges.

    (a) Discharges led through the shell either from spaces below the 
freeboard deck or from within superstructures and deckhouses on the 
freeboard deck fitted with doors complying with the requirements of 
Sec. 42.15-10 shall be fitted with efficient and accessible means for 
preventing water from passing inboard. Normally, each separate discharge 
shall have one automatic nonreturn valve with a positive means of 
closing it from a position above the freeboard deck. Where, however, the 
vertical distance from the summer load waterline to the inboard end of 
the discharge pipe exceeds 0.01L, the discharge may have two automatic 
nonreturn valves without positive means of closing: Provided, That the 
inboard valve is always accessible for examination under service 
conditions; where that vertical distance exceeds 0.02L a single 
automatic nonreturn valve without positive means of closing may be 
accepted subject to the approval of the assigning authority. The means 
for operating the positive action valve shall be readily accessible and 
provided with an indicator showing whether the valve is open or closed.
    (b) In manned machinery spaces main and auxiliary sea inlets and 
discharges in connection with the operation of machinery may be 
controlled locally. The controls shall be readily accessible and shall 
be provided with indicators showing whether the valves are open or 
closed.
    (c) Scuppers and discharge pipes originating at any level and 
penetrating the shell either more than 17\1/2\ inches below the 
freeboard deck or less than 23\1/2\ inches above the summer load 
waterline shall be provided with a nonreturn valve at the shell. This 
valve, unless required by paragraph (a) of this section, may be omitted 
if the piping is of thickness as specified in Part 56 in Subchapter F 
(Marine Engineering) of this chapter.
    (d) Scuppers leading from superstructures or deckhouses not fitted 
with doors complying with the requirements of Sec. 42.15-10 shall be led 
overboard.
    (e) All valves and shell fittings required by this section shall be 
of steel, bronze, or other approved ductile material. Valves of ordinary 
cast iron or similar material are not acceptable. All pipes to which 
this section refers shall be of steel or other equivalent material to 
the satisfaction of the assigning authority.

[CGFR 68-60, 33 FR 10062, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-65   Side scuttles.

    (a) Side scuttles to spaces below the freeboard deck or to spaces 
within enclosed superstructures shall be fitted with efficient hinged 
inside deadlights arranged so that they can be effectively closed and 
secured watertight.
    (b) No side scuttle shall be fitted in a position so that its sill 
is below a line drawn parallel to the freeboard deck at side and having 
its lowest point 2.5 percent of the breadth (B) above the load 
waterline, or 19\1/2\ inches, which ever is the greater distance.

[[Page 36]]

    (c) The side scuttles, together with their glasses, if fitted, and 
deadlights, shall be of substantial and approved construction.

[CGFR 68-60, 33 FR 10062, July 12, 1968]



Sec. 42.15-70   Freeing ports.

    (a) Where bulwarks on the weather portions of freeboard or 
superstructure decks form wells, ample provision shall be made for 
rapidly freeing the deck of water and for draining them. Except as 
provided in paragraphs (b) and (c) of this section, the minimum freeing 
port area (A) on each side of the vessel for each well on the freeboard 
deck shall be that given by the following formulae in cases where the 
sheer in way of the well is standard or greater than standard. The 
minimum area for each well on superstructure decks shall be one-half of 
the area given by the formulae.
    (1) Where the length of bulwark (l) in the well is 66 feet or less 
A=7.6+0.115l (square feet)
    (2) Where l exceeds 66 feet A=0.23l (square feet)
    (3) l need in no case be taken as greater than 0.7L.
    (4) If the bulwark is more than 3.9 feet in average height the 
required area shall be increased by 0.04 square feet per foot of length 
of well for each foot difference in height. If the bulwark is less than 
3 feet in average height, the required area may be decreased by 0.04 
square feet per foot of length for each foot difference in height.
    (b) In vessels with no sheer the area calculated according to 
paragraph (a) of this section shall be increased by 50 percent. Where 
the sheer is less than the standard the percentage shall be obtained by 
linear interpolation.
    (c) Where a vessel is fitted with a trunk which does not comply with 
the requirements of Sec. 42.20-55(a)(5) or where continuous or 
substantially continuous hatchway side coamings are fitted between 
detached superstructures the minimum area of the freeing port openings 
shall be calculated from Table 42.15-70(c):

                            Table 42.15-70(c)                           
------------------------------------------------------------------------
                                              Area of freeing ports in  
 Breadth of hatchway or trunk in relation    relation to the total area 
         to the breadth of vessel                  of the bulwarks      
------------------------------------------------------------------------
40 percent or less........................  20 percent.                 
75 percent or more........................  10 percent.                 
------------------------------------------------------------------------

    Note: The area of freeing ports at intermediate breadths shall be 
obtained by linear interpolation.

    (d) In vessels having superstructures which are open at either or 
both ends, adequate provision for freeing the space within such 
superstructures shall be provided to the satisfaction of the assigning 
authority.
    (e) The lower edges of the freeing ports shall be as near the deck 
as practicable. Two-thirds of the freeing port area required shall be 
provided in the half of the well nearest the lowest point of the sheer 
curve.
    (f) All such openings in the bulwarks shall be protected by rails or 
bars spaced approximately 9 inches apart. If shutters are fitted to 
freeing ports, ample clearance shall be provided to prevent jamming. 
Hinges shall have pins or bearings of noncorrodible material. If 
shutters are fitted with securing appliances, these appliances shall be 
of approved construction.

[CGFR 68-60, 33 FR 10062, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969]



Sec. 42.15-75   Protection of the crew.

    (a) The strength of the deckhouses used for the accommodation of the 
crew shall be to the satisfaction of the assigning authority.
    (b) Efficient guard rails or bulwarks must be fitted on all exposed 
parts of the freeboard and superstructure decks as follows:
    (1) The height of the bulwarks or guard rails must be at least 39\1/
2\ inches from the deck, provided that where this height would interfere 
with the normal operation of the vessel, a lesser height may be approved 
if the Commandant and the assigning authority are satisfied that 
adequate protection is provided.

[[Page 37]]

    (2) On each vessel that is initially surveyed for load line 
assignment after January 1, 1976, and that is exclusively engaged in 
towing operations, the minimum bulwark or rail height on the freeboard 
deck may be reduced to 30 inches provided the assigning authority is 
satisfied that adequate grabrails are provided around the periphery of 
the deckhouse.
    (3) Portable rails may be used when operating conditions warrant 
their use.
    (c) The opening below the lowest course of the guard rails shall not 
exceed 9 inches. The other courses shall be not more than 15 inches 
apart. In the case of vessels with rounded gunwales the guard rail 
supports shall be placed on the flat of the deck.
    (d) Satisfactory means (in the form of guard rails, life lines, 
gangways or underdeck passages, etc.) shall be provided for the 
protection of the crew in getting to and from their quarters, the 
machinery space and all other parts used in the necessary work of the 
vessel.
    (e) Deck cargo carried on any vessel shall be so stowed that any 
opening which is in way of the cargo and which gives access to and from 
the crew's quarters, the machinery space and all other parts used in the 
necessary work of the vessel, can be properly closed and secured against 
the admission of water. Effective protection for the crew in the form of 
guard rails or life lines shall be provided above the deck cargo if 
there is no convenient passage on or below the deck of the vessel.

[CGFR 68-60, 33 FR 10062, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969; CGD 74-164, 41 FR 1470, Jan. 8, 1976]



Sec. 42.15-80  Special conditions of assignment for Type ``A'' vessels.

    (a) Machinery casings. Machinery casings on Type ``A'' vessels as 
defined in Sec. 42.09-5(b) must be protected by an enclosed poop or 
bridge of at least standard height, or by a deckhouse of equal height 
and equivalent strength, except that machinery casings may be exposed if 
there are no openings giving direct access from the freeboard deck to 
the machinery space. A door complying with the requirements of 
Sec. 42.15-10 is permitted in the machinery casing if it leads to a 
space or passageway which is as strongly constructed as the casing and 
is separated from the stairway to the engine room by a second 
weathertight door of steel or equivalent material.
    (b) Gangway and access. (1) An efficiently constructed fore and aft 
permanent gangway of sufficient strength shall be fitted on Type ``A'' 
vessels at the level of the superstructure deck between the poop and the 
midship bridge or deckhouse where fitted, or equivalent means of access 
shall be provided to carry out the purpose of the gangway, such as 
passages below deck. Elsewhere, and on Type ``A'' vessels without a 
midship bridge, arrangements to the satisfaction of the assigning 
authority shall be provided to safeguard the crew in reaching all parts 
used in the necessary work of the ship.
    (2) Safe and satisfactory access from the gangway level shall be 
available between separates crew accommodations and also between crew 
accommodations and the machinery space.
    (c) Hatchways. Exposed hatchways on the freeboard and forecastle 
decks or on the tops of expansion trunks on Type ``A'' vessels shall be 
provided with efficient watertight covers of steel or other equivalent 
material.
    (d) Freeing arrangements. (1) Type ``A'' vessels with bulwarks shall 
have open rails fitted for at least half the length of the exposed parts 
of the weather deck or other effective freeing arrangements. The upper 
edge of the sheer strake shall be kept as low as practicable.
    (2) Where superstructures are connected by trunks, open rails shall 
be fitted for the whole length of the exposed parts of the freeboard 
deck.

[CGFR 68-60, 33 FR 10063, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9014, June 5, 1969; CGD 79-153, 48 FR 38647, Aug. 25, 1983]



                        Subpart 42.20--Freeboards



Sec. 42.20-3  Freeboard assignment: Type ``A'' vessels.

    (a) A Type ``A'' vessel is assigned a freeboard not less than that 
based on Table 42.20-15(a)(1) provided that the vessel meets the 
flooding standard in Sec. 42.20-6.
    (b) A vessel that meets the requirements of Subpart D, F, or G of 
Part 172

[[Page 38]]

of this chapter is considered by the Coast Guard as meeting the flooding 
standard referenced in paragraph (a) of this section.

[CGD 79-153, 48 FR 38647, Aug. 25, 1983 as amended by CGD 79-023, 49 FR 
26593, June 28, 1984]



Sec. 42.20-5  Freeboard assignment: Type ``B'' vessels.

    (a) Each Type ``B'' vessel is assigned a freeboard from Table 42.20-
15(b)(1) that is increased or decreased by the provisions of this 
section.
    (b) Each Type ``B'' vessel that has a hatchway in position 1, must 
have the freeboard assigned in accordance with paragraph (a) of this 
section increased by the amount given in Table 42.20-5(b) unless the 
hatch cover complies with:
    (1) Section 42.15-25(d); or
    (2) Section 42.15-30.

  Table 42.20-5(b)--Freeboard Increase Over Tabular Freeboard for Type  
 ``B'' Vessels With Hatch Covers Not Complying With Sec.  42.15-25(d) or
                             Sec.  42.15-30.                            
                                [Metric]                                
------------------------------------------------------------------------
     Length of ship (meters)         Freeboard increase 1 (millimeters) 
------------------------------------------------------------------------
              \2\108                                 50                 
               109                                   52                 
               110                                   55                 
               111                                   57                 
               112                                   59                 
               113                                   62                 
               114                                   64                 
               115                                   68                 
               116                                   70                 
               117                                   73                 
               118                                   76                 
               119                                   80                 
               120                                   84                 
               121                                   87                 
               122                                   91                 
               123                                   95                 
               124                                   99                 
               125                                  103                 
               126                                  108                 
               127                                  112                 
               128                                  116                 
               129                                  121                 
               130                                  126                 
               131                                  131                 
               132                                  136                 
               133                                  142                 
               134                                  147                 
               135                                  153                 
               136                                  159                 
               137                                  164                 
               138                                  170                 
               139                                  175                 
               140                                  181                 
               141                                  186                 
               142                                  191                 
               143                                  196                 
               144                                  201                 
               145                                  206                 
               146                                  210                 
               147                                  215                 
               148                                  219                 
               149                                  224                 
               150                                  228                 
               151                                  232                 
               152                                  236                 
               153                                  240                 
               154                                  244                 
               155                                  247                 
               156                                  251                 
               157                                  254                 
               158                                  258                 
               159                                  261                 
               160                                  264                 
               161                                  267                 
               162                                  270                 
               163                                  273                 
               164                                  275                 
               165                                  278                 
               166                                  280                 
               167                                  283                 
               168                                  285                 
               169                                  287                 
               170                                  290                 
               171                                  292                 
               172                                  294                 
               173                                  297                 
               174                                  299                 
               175                                  301                 
               176                                  304                 
               177                                  306                 
               178                                  308                 
               179                                  311                 
               180                                  313                 
               181                                  315                 
               182                                  318                 
               183                                  320                 
               184                                  322                 
               185                                  325                 
               186                                  327                 
               187                                  329                 
               188                                  332                 
               189                                  334                 
               190                                  336                 
               191                                  339                 
               192                                  341                 
               193                                  343                 
               194                                  346                 
               195                                  348                 
               196                                  350                 
               197                                  353                 
               198                                  355                 
               199                                  357                 
              \3\200                                358                 
------------------------------------------------------------------------
\1\ Freeboards at intermediate lengths of ship shall be obtained by     
  linear interpolation.                                                 
\2\ 108 and below.                                                      
\3\ Ships above 200 meters in length are subject to individual          
  determination by the Commandant.                                      


[[Page 39]]


                                [English]                               
------------------------------------------------------------------------
      Length of ship (feet)           Freeboard increase \1\ (inches)   
------------------------------------------------------------------------
             \2\350                                 2.0                 
               360                                  2.3                 
               370                                  2.6                 
               380                                  2.9                 
               390                                  3.3                 
               400                                  3.7                 
               410                                  4.2                 
               420                                  4.7                 
               430                                  5.2                 
               440                                  5.8                 
               450                                  6.4                 
               460                                  7.0                 
               470                                  7.6                 
               480                                  8.2                 
               490                                  8.7                 
               500                                  9.2                 
               510                                  9.6                 
               520                                 10.0                 
               530                                 10.4                 
               540                                 10.7                 
               550                                 11.0                 
               560                                 11.4                 
               570                                 11.8                 
               580                                 12.1                 
               590                                 12.5                 
               600                                 12.8                 
               610                                 13.1                 
               620                                 13.4                 
               630                                 13.6                 
               640                                 13.9                 
               650                                 14.1                 
             \3\660                                14.3                 
------------------------------------------------------------------------
\1\ Freeboards at intermediate lengths of ship be obtained by linear    
  interpolation.                                                        
\2\ 350 and below.                                                      
\3\ Ships above 660 feet in length are subject to individual            
  determination by the Commandant.                                      

    (c) Any Type ``B'' vessel that is greater than 100 meters (328 feet) 
in length and any hopper dredge meeting the requirements in Subpart C of 
Part 44 of this chapter may have a reduced freeboard from that assigned 
under Table 42.20-15(b)(1) in accordance with paragraph (d) or paragraph 
(e) of this section if--
    (1) The measures provided for the protection of the crew are 
adequate;
    (2) The freeing arrangements are adequate; and
    (3) The hatchway covers in positions 1 and 2 comply with the 
provisions of Sec. 42.15-30 and have adequate strength, special care 
being given to their sealing and securing arrangements.
    (d) The freeboards for a Type ``B'' vessel which comply with 
paragraph (c) of this section may be reduced up to 60 percent of the 
total difference between the freeboards in Table 42.20-15(b)(1) and 
Table 42.20-15(a)(1) provided that the vessel meets the flooding 
standard in Sec. 42.20-7.
    (e) The freeboards for a Type ``B'' vessel which complies with 
paragraph (c) of this section may be reduced up to the total difference 
between the freeboard tables referenced in paragraph (d) of this section 
provided that the vessel meets the flooding standard in Sec. 42.20-8 and 
the provisions of Sec. 42.15-80 (a), (b) and (d) as if it were a Type 
``A'' vessel.

[CGD 79-153, 48 FR 38647, Aug. 25, 1983, as amended by CGD 76-080, 54 FR 
36976, Sept. 6, 1989]



Sec. 42.20-6  Flooding standard: Type ``A'' vessels.

    (a) Design calculations must be submitted that demonstrate that the 
vessel will remain afloat in the conditions of equilibrium specified in 
Sec. 42.20-12 assuming the damage specified in Sec. 42.20-11 as applied 
to the following flooding standards:
    (1) If the vessel is over 150 meters (492 feet) in length it must be 
able to withstand the flooding of any one compartment, except the 
machinery space.
    (2) If the vessel is over 225 meters (738 feet) in length, it must 
be able to withstand the flooding of any one compartment, treating the 
machinery space as a floodable compartment.
    (b) When doing the calculations required in paragraph (a) of this 
section, the following permeabilities must be assumed:
    (1) 0.95 in all locations except the machinery space.
    (2) 0.85 in the machinery space.

[CGD 79-153, 48 FR 38648, Aug. 25, 1983]



Sec. 42.20-7  Flooding standard: Type ``B'' vessel, 60 percent reduction.

    (a) Design calculations must be submitted that demonstrate that the 
vessel will remain afloat in the conditions of equilibrium specified in 
Sec. 42.20-12 assuming the damage specified in Sec. 42.20-11 as applied 
to the following flooding standards:
    (1) If the vessel is 225 meters (738 feet) or less in length, it 
must be able to withstand the flooding of any one compartment, except 
the machinery space.

[[Page 40]]

    (2) If the vessel is over 225 meters (738 feet) in length, it must 
be able to withstand the flooding of any one compartment, treating the 
machinery space as a floodable compartment.
    (b) When doing the calculations required in paragraph (a) of this 
section, the following permeabilities must be assumed:
    (1) 0.95 in all locations except the machinery space.
    (2) 0.85 in the machinery space.

[CGD 79-153, 48 FR 38648, Aug. 25, 1983]



Sec. 42.20-8  Flooding standard: Type ``B'' vessel, 100 percent reduction.

    (a) Design calculations must be submitted that demonstrate that the 
vessel will remain afloat in the conditions of equilibrium specified in 
Sec. 42.20-12 assuming the damage specified in Sec. 42.20-11 as applied 
to the following flooding standards:
    (1) If the vessel is 225 meters (738 feet) or less in length, it 
must be able to withstand the flooding of any two adjacent fore and 
after compartments excluding the machinery space;
    (2) If the vessel is over 225 meters (738 feet) in length, the 
flooding standard of paragraph (a)(1) of this section must be applied, 
treating the machinery space, taken alone, as a floodable compartment.
    (b) When doing the calculations required in paragraph (a) of this 
section, the following permeabilities must be assumed:
    (1) 0.95 in all locations except the machinery space.
    (2) 0.85 in the machinery space.

[CGD 79-153, 48 FR 38648, Aug. 25, 1983]



Sec. 42.20-9  Initial conditions of loading.

    When doing the calculations required in Secs. 42.20-6(a), 42.20-7(a) 
and 42.20-8(a), the initial condition of loading before flooding must be 
assumed to be as specified in this section:
    (a) The vessel is assumed to be loaded to its summer load waterline 
with no trim.
    (b) When calculating the vertical center of gravity, the following 
assumptions apply:
    (1) The cargo is assumed to be homogeneous.
    (2) Except as specified in paragraph (b)(3) of this section, all 
cargo compartments are assumed to be fully loaded. This includes 
compartments intended to be only partially filled. In the case of liquid 
cargoes, fully loaded means 98 percent full.
    (3) If the vessel is intended to operate at its summer load 
waterline with empty compartments, these empty compartments are assumed 
to be empty rather than fully loaded if the resulting height of the 
vertical center of gravity is not less than the height determined in 
accordance with paragraph (b)(2) of this section.
    (4) Fifty percent of the total capacity of all tanks and spaces 
fitted to contain consumable liquids or stores must be assumed to be 
distributed to accomplish the following:
    (i) Each tank and space fitted to contain consumable liquids or 
stores must be assumed either completely empty or completely filled.
    (ii) The consumables must be distributed so as to produce the 
greatest possible height above the keel for the center of gravity.
    (5) Weights are calculated using the following values for specific 
gravities:

Salt water--1.025
Fresh water--1.000
Oil fuel--0.950
Diesel oil--0.900
Lube oil--0.900

[CGD 79-153, 48 FR 38648, Aug. 25, 1983]



Sec. 42.20-10  Free surface.

    When doing the calculations required in Secs. 42.20-6(a), 42.20-7(a) 
and 42.20-8(a), the effect of free surface of the following liquids must 
be included:
    (a) For each type of consumable liquid, the maximum free surface of 
at least one transverse pair of tanks or a single centerline tank must 
be included. The tank or combination of tanks must be that resulting in 
the greatest free surface effect.
    (b) For cargo liquids, unless the compartment is assumed to be empty 
as required by Sec. 42.20-9(b)(3), the free surface of those 
compartments containing liquids is calculated at an angle of heel of not 
more than 5 degrees.

[CGD 79-153, 48 FR 38649, Aug. 25, 1983]

[[Page 41]]



Sec. 42.20-11  Extent of damage.

    When doing the calculations required by Secs. 42.20-6(a), 42.20-7(a) 
and 42.20-8(a), the following must be assumed:
    (a) The vertical extent of damage in all cases must be assumed to be 
from the baseline upward without limit.
    (b) The transverse extent of damage is assumed to be equal to B/5 or 
11.5 meters (37.7 feet), whichever is less. The transverse extent is 
measured inboard from the side of the ship perpendicularly to the center 
line at the level of the summer load waterline.
    (c) If damage of a lesser extent than that specified in paragraph 
(a) or (b) of this section results in a more severe condition, the 
lesser extent must be assumed.
    (d) The following assumptions apply to the transverse damage 
specified in paragraph (b) of this section for a stepped or recessed 
bulkhead:
    (1) A transverse watertight bulkhead that has a step or recess 
located within the transverse extent of assumed damage may be considered 
intact if the step or recess is not more than 3.05 meters (10 feet) in 
length.
    (2) If a transverse watertight bulkhead has a step or recess of more 
than 3.05 meters (10 feet) in length, within the transverse extent of 
assumed damage, the two compartments adjacent to this bulkhead must be 
considered as flooded.
    (3) If within the transverse extent of damage, a transverse bulkhead 
has a step or recess more than 3.05 meters (10 feet) in length that 
coincides with the double bottom tank top or the inner boundary of a 
wing tank, respectively, all adjacent compartments within the transverse 
extent of assumed damage must be considered to be flooded 
simultaneously.
    (e) If a wing tank has openings into adjacent compartments, the wing 
tank and adjacent compartments must be considered as one compartment. 
This provision applies even where these openings are fitted with closing 
appliances except:
    (1) Valves fitted in bulkheads between tanks which are controlled 
from above the bulkhead deck.
    (2) Secured manhole covers fitted with closely spaced bolts.
    (f) Only transverse watertight bulkheads that are spaced apart at 
least \1/3\(L)\2/3\ or 14.5 meters (0.495(L)\2/3\ or 47.6 
feet), whichever is less, may be considered effective. If transverse 
bulkheads are closer together, then one or more of these bulkheads must 
be assumed to be non-existent in order to achieve the minimum spacing 
between bulkheads.

[CGD 79-153, 48 FR 38649, Aug. 25, 1983]



Sec. 42.20-12  Conditions of equilibrium.

    The following conditions of equilibrium are regarded as 
satisfactory:
    (a) Downflooding. The final waterline after flooding, taking into 
account sinkage, heel, and trim, is below the lower edge of any opening 
through which progressive flooding can take place. Such openings include 
air pipes, ventilators, and openings which are closed by means of 
weathertight doors (even if they comply with Sec. 42.15-10) or covers 
(even if they comply with Sec. 42.15-30 or Sec. 42.15-45(d)) but may 
exclude those openings closed by means of:
    (1) Manhole covers and flush scuttles which comply with Sec. 42.15-
40;
    (2) Cargo hatch covers which comply with Sec. 42.09-5(b);
    (3) Hinged watertight doors in an approved position which are 
secured closed while at sea and so logged; and
    (4) Remotely operated sliding watertight doors, and side scuttles of 
the non-opening type which comply with Sec. 42.15-65.
    (b) Progressive flooding. If pipes, ducts, or tunnels are situated 
within the assumed extent of damage penetration as defined in 
Sec. 42.20-11 (a) and (b), progressive flooding cannot extend to 
compartments other than those assumed to be floodable in the calculation 
for each case of damage.
    (c) Final angle of heel. The angle of heel due to unsymmetrical 
flooding does not exceed 15 degrees. If no part of the deck is immersed, 
an angle of heel of up to 17 degrees may be accepted.
    (d) Metacentric height. The metacentric height of the damaged 
vessel, in the upright condition, is positive.
    (e) Residual stability. Through an angle of 20 degrees beyond its 
position of equilibrium, the vessel must meet the following conditions:

[[Page 42]]

    (1) The righting arm must be positive.
    (2) The maximum righting arm must be at least 0.1 meter (4 inches).
    (3) The area under the righting arm curve within the 20 degree range 
must not be less than 0.0175 meter-radians (0.689 inch-radians).
    (4) Each submerged opening must be weathertight (e.g. a vent fitted 
with a ball check valve).
    (f) Intermediate stages of flooding. The Commandant is satisfied 
that the stability is sufficient during intermediate stages of flooding.

[CGD 79-153, 48 FR 38649, Aug. 25, 1983]



Sec. 42.20-13  Vessels without means of propulsion.

    (a) A lighter, barge, or other vessel without independent means of 
propulsion is assigned a freeboard in accordance with the provisions of 
this subpart as modified by paragraphs (b), (c), and (d) of this 
section.
    (b) A barge that meets the requirements of Sec. 42.09-5(b) may be 
assigned Type ``A'' freeboard if the barge does not carry deck cargo.
    (c) An unmanned barge is not required to comply with Sec. 42.15-75, 
Sec. 42.15-80(b), or Sec. 42.20-70.
    (d) An unmanned barge that has only small access openings closed by 
watertight gasketed covers of steel or equivalent material on the 
freeboard deck, may be assigned a freeboard 25 percent less than that 
calculated in accordance with this subpart.

[CGD 79-153, 48 FR 38649, Aug. 25, 1983]



Sec. 42.20-15   Freeboard tables.

    (a) Type ``A'' vessel. (1) The tabular freeboard for Type ``A'' 
vessel shall be determined from Table 42.20-15(a)(1):


      Table 42.20-15(a)(1)--Freeboard Table for Type ``A'' Vessels      
------------------------------------------------------------------------
                                                            Freeboard\1\
                  Length of vessel (feet)                     (inches)  
------------------------------------------------------------------------
80........................................................          8.0 
90........................................................          8.9 
100.......................................................          9.8 
110.......................................................         10.8 
120.......................................................         11.9 
130.......................................................         13.0 
140.......................................................         14.2 
150.......................................................         15.5 
160.......................................................         16.9 
170.......................................................         18.3 
180.......................................................         19.8 
190.......................................................         21.3 
200.......................................................         22.9 
210.......................................................         24.5 
220.......................................................         26.2 
230.......................................................         27.8 
240.......................................................         29.5 
250.......................................................         31.1 
260.......................................................         32.8 
270.......................................................         34.6 
280.......................................................         36.3 
290.......................................................         38.0 
300.......................................................         39.7 
310.......................................................         41.4 
320.......................................................         43.2 
330.......................................................         45.0 
340.......................................................         46.9 
350.......................................................         48.8 
360.......................................................         50.7 
370.......................................................         52.7 
380.......................................................         54.7 
390.......................................................         56.8 
400.......................................................         58.8 
410.......................................................         60.9 
420.......................................................         62.9 
430.......................................................         65.0 
440.......................................................         67.0 
450.......................................................         69.1 
460.......................................................         71.1 
470.......................................................         73.1 
480.......................................................         75.1 
490.......................................................         77.1 
500.......................................................         79.0 
510.......................................................         80.9 
520.......................................................         82.7 
530.......................................................         84.5 
540.......................................................         86.3 
550.......................................................         88.0 
560.......................................................         89.6 
570.......................................................         91.1 
580.......................................................         92.6 
590.......................................................         94.1 
600.......................................................         95.5 
610.......................................................         96.9 
620.......................................................         98.3 
630.......................................................         99.6 
640.......................................................        100.9 
650.......................................................        102.1 
660.......................................................        103.3 
670.......................................................        104.4 
680.......................................................        105.5 
690.......................................................        106.6 
700.......................................................        107.7 
710.......................................................        108.7 
720.......................................................        109.7 
730.......................................................        110.7 
740.......................................................        111.7 
750.......................................................        112.6 
760.......................................................        113.5 
770.......................................................        114.4 
780.......................................................        115.3 
790.......................................................        116.1 
800.......................................................        117.0 
810.......................................................        117.8 
820.......................................................        118.6 
830.......................................................        119.3 
840.......................................................        120.1 
850.......................................................        120.7 
860.......................................................        121.4 

[[Page 43]]

                                                                        
870.......................................................        122.1 
880.......................................................        122.7 
890.......................................................        123.4 
900.......................................................        124.0 
910.......................................................        124.6 
920.......................................................        125.2 
930.......................................................        125.7 
940.......................................................        126.2 
950.......................................................        126.7 
960.......................................................        127.2 
970.......................................................        127.7 
980.......................................................        128.1 
990.......................................................        128.6 
1,000.....................................................        129.0 
1,010.....................................................        129.4 
1,020.....................................................        129.9 
1,030.....................................................        130.3 
1,040.....................................................        130.7 
1,050.....................................................        131.0 
1,060.....................................................        131.4 
1,070.....................................................        131.7 
1,080.....................................................        132.0 
1,090.....................................................        132.3 
1,100.....................................................        132.6 
1,110.....................................................        132.9 
1,120.....................................................        133.2 
1,130.....................................................        133.5 
1,140.....................................................        133.8 
1,150.....................................................        134.0 
1,160.....................................................        134.3 
1,170.....................................................        134.5 
1,180.....................................................        134.7 
1,190.....................................................        135.0 
1,200.....................................................        135.2 
1,200\2\..................................................              
------------------------------------------------------------------------
\1\Freeboards at intermediate lengths of vessels shall be obtained by   
  linear interpolation.                                                 
\2\Vessels above 1,200 feet in length shall be dealt with by the        
  Commandant.                                                           

    (b) Type ``B'' vessels. (1) The tabular freeboard for Type ``B'' 
vessels shall be determined from Table 42.20-15(b)(1):

      Table 42.20-15(b)(1)--Freeboard Table for Type ``B'' Vessels      
------------------------------------------------------------------------
                                                            Freeboard\1\
                  Length of vessel (feet)                     (inches)  
------------------------------------------------------------------------
80........................................................          8.0 
90........................................................          8.9 
100.......................................................          9.8 
110.......................................................         10.8 
120.......................................................         11.9 
130.......................................................         13.0 
140.......................................................         14.2 
150.......................................................         15.5 
160.......................................................         16.9 
170.......................................................         18.3 
180.......................................................         19.8 
190.......................................................         21.3 
200.......................................................         22.9 
210.......................................................         24.7 
220.......................................................         26.6 
230.......................................................         28.5 
240.......................................................         30.4 
250.......................................................         32.4 
260.......................................................         34.4 
270.......................................................         36.5 
280.......................................................         38.7 
290.......................................................         41.0 
300.......................................................         43.3 
310.......................................................         45.7 
320.......................................................         48.2 
330.......................................................         50.7 
340.......................................................         53.2 
350.......................................................         55.7 
360.......................................................         58.2 
370.......................................................         60.7 
380.......................................................         63.2 
390.......................................................         65.7 
400.......................................................         68.2 
410.......................................................         70.7 
420.......................................................         73.2 
430.......................................................         75.7 
440.......................................................         78.2 
450.......................................................         80.7 
460.......................................................         83.1 
470.......................................................         85.6 
480.......................................................         88.1 
490.......................................................         90.6 
500.......................................................         93.1 
510.......................................................         95.6 
520.......................................................         98.1 
530.......................................................        100.6 
540.......................................................        103.0 
550.......................................................        105.4 
560.......................................................        107.7 
570.......................................................        110.0 
580.......................................................        112.3 
590.......................................................        114.6 
600.......................................................        116.8 
610.......................................................        119.0 
620.......................................................        121.1 
630.......................................................        123.2 
640.......................................................        125.3 
650.......................................................        127.3 
660.......................................................        129.3 
670.......................................................        131.3 
680.......................................................        133.3 
690.......................................................        135.3 
700.......................................................        137.1 
710.......................................................        139.0 
720.......................................................        140.9 
730.......................................................        142.7 
740.......................................................        144.5 
750.......................................................        146.3 
760.......................................................        148.1 
770.......................................................        149.8 
780.......................................................        151.5 
790.......................................................        153.2 
800.......................................................        154.8 
810.......................................................        156.4 
820.......................................................        158.0 
830.......................................................        159.6 
840.......................................................        161.2 
850.......................................................        162.8 
860.......................................................        164.3 
870.......................................................        165.9 
880.......................................................        167.4 
890.......................................................        168.9 
900.......................................................        170.4 
910.......................................................        171.8 
920.......................................................        173.3 
930.......................................................        174.7 
940.......................................................        176.1 
950.......................................................        177.5 
960.......................................................        178.9 

[[Page 44]]

                                                                        
970.......................................................        180.3 
980.......................................................        181.7 
990.......................................................        183.1 
1,000.....................................................        184.4 
1,010.....................................................        185.8 
1,020.....................................................        187.2 
1,030.....................................................        188.5 
1,040.....................................................        189.8 
1,050.....................................................        191.0 
1,060.....................................................        192.3 
1,070.....................................................        193.5 
1,080.....................................................        194.8 
1,090.....................................................        196.1 
1,100.....................................................        197.3 
1,110.....................................................        198.6 
1,120.....................................................        199.9 
1,130.....................................................        201.2 
1,140.....................................................        202.3 
1,150.....................................................        203.5 
1,160.....................................................        204.6 
1,170.....................................................        205.8 
1,180.....................................................        206.9 
1,190.....................................................        208.1 
1,200.....................................................        209.3 
1,200\2\..................................................              
------------------------------------------------------------------------
\1\Freeboards at intermediate lengths of vessel shall be obtained by    
  linear interpolation.                                                 
\2\Vessels above 1,200 feet in length shall be dealt with by the        
  Commandant.                                                           

[CGFR 68-60, 33 FR 10064, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9015, June 5, 1969]



Sec. 42.20-20   Correction to the freeboard for vessels under 328 feet in length.

    (a) The tabular freeboard for a Type ``B'' vessel of between 79 feet 
and 328 feet in length having enclosed superstructures with an effective 
length of up to 35 percent of the length of the vessel shall be 
increased by:

                    0.09 (328-L) [0.35-(E/L)] inches

where:
L=length of vessel in feet.
E=effective length of superstructure in feet as defined in Sec. 42.20-
50.

[CGFR 68-60, 33 FR 10064, July 12, 1968]



Sec. 42.20-25  Correction for block coefficient.

    If the block coefficient (Cb) exceeds 0.68, the tabular freeboard 
specified in Sec. 42.20-15 as modified, if applicable, by Secs. 42.20-5 
(b) and (d), and 42.20-20(a) must be multiplied by the factor (Cb+0.68)/
1.36.

[CGD 79-153, 48 FR 38650, Aug. 25, 1983]



Sec. 42.20-30   Correction for depth.

    (a) Where D exceeds L\1/15\ the freeboard shall be increased by 
[D-(L/15)] R inches, where R is L/131.2 at lengths less than 393.6 feet 
and 3 at 393.6 feet length and above.
    (b) Where D is less than L/15 no reduction shall be made except in a 
vessel with an enclosed superstructure covering at least 0.6L amidships, 
with a complete trunk, or combination of detached enclosed 
superstructures and trunks which extend all fore and aft, where the 
freeboard shall be reduced at the rate prescribed in paragraph (a) of 
this section.
    (c) Where the height of superstructure or trunk is less than the 
standard height, the reduction shall be in the ratio of the actual to 
the standard height as defined in Sec. 42.20-40.

[CGFR 68-60, 33 FR 10064, July 12, 1968]



Sec. 42.20-35   Correction for position of deck line.

    (a) Where the actual depth to the upper edge of the deck line is 
greater or less than D, the difference between the depths shall be added 
to or deducted from the freeboard.

[CGFR 68-60, 33 FR 10065, July 12, 1968]



Sec. 42.20-40   Standard height of superstructure.

    (a) The standard height of a superstructure shall be as given in 
Table 42.20-40(a):

             Table 42.20-40(a) Standard Heights (in Feet)\1\            
------------------------------------------------------------------------
                                                     Raised    All other
               Length (L) (in feet)                  quarter     super  
                                                      deck    structures
------------------------------------------------------------------------
98.5 or less......................................       3.0        5.9 
246...............................................       3.9        5.9 
410 or more.......................................       5.9       7.5  
------------------------------------------------------------------------
\1\The standard heights at intermediate lengths of the vessel shall be  
  obtained by linear interpolation.                                     

[CGFR 68-60, 33 FR 10065, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9015, June 5, 1969]



Sec. 42.20-45   Length of superstructure.

    (a) Except as provided in paragraph (b) of this section, the length 
of a superstructure (S) shall be the mean

[[Page 45]]

length of the parts of the superstructure which lie within the length 
(L).
    (b) Where the end bulkhead of an enclosed superstructure extends in 
a fair convex curve beyond its intersection with the superstructure 
sides, the length of the superstructure may be increased on the basis of 
an equivalent plane bulkhead. This increase shall be two-thirds of the 
fore and aft extent of curvature. The maximum curvature which may be 
taken into account in determining this increase is one-half the breadth 
of the superstructure at the point of intersection of the curved end of 
the superstructure with its side.

[CGFR 68-60, 33 FR 10065, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9015, June 5, 1969]



Sec. 42.20-50   Effective length of superstructure.

    (a) Except as provided for in paragraph (b) of this section the 
effective length (E) of an enclosed superstructure of standard height 
shall be its length.
    (b) In all cases where an enclosed superstructure of standard height 
is set in from the sides of the vessel as permitted in Sec. 42.13-15(j), 
the effective length shall be the length modified by the ratio of b/Bs,

where:
    ``b'' is the breadth of the superstructure at the middle of its 
length;
    ``Bs'' is the breadth of the vessel at the middle of the length of 
the superstructure.

    (1) Where a superstructure is set in for a part of its length, this 
modification shall be applied only to the set in part.
    (c) Where the height of an enclosed superstructure is less than the 
standard height, the effective length shall be its length reduced in the 
ratio of the actual height to the standard height. Where the height 
exceeds the standard, no increase shall be made to the effective length 
of the superstructure.
    (d) The effective length of a raised quarter deck if fitted with an 
intact front bulkhead, shall be its length up to a maximum of 0.6L. 
Where the bulkhead is not intact, the raised quarter deck shall be 
treated as a poop of less than standard height.
    (e) Superstructures which are not enclosed shall have no effective 
length.

[CGFR 68-60, 33 FR 10065, July 12, 1968]



Sec. 42.20-55   Trunks.

    (a) A trunk or similar structure which does not extend to the sides 
of the vessel shall be regarded as efficient on the following 
conditions:
    (1) The trunk is at least as strong as a superstructure;
    (2) The hatchways are in the trunk deck, and the hatchway coamings 
and covers comply with the requirements of Secs. 42.15-15 to 42.15-30, 
inclusive, and the width of the trunk deck stringer provides a 
satisfactory gangway and sufficient lateral stiffness; however, small 
access openings with watertight covers may be permitted in the freeboard 
deck;
    (3) A permanent working platform fore and aft fitted with guard 
rails is provided by the trunk deck, or by detached trunks connected to 
superstructures by efficient permanent gangways;
    (4) Ventilators are protected by the trunk by watertight covers or 
by other equivalent means;
    (5) Open rails are fitted on the weather parts of the freeboard deck 
in way of the trunk for at least half their length;
    (6) The machinery casings are protected by the trunk, by a 
superstructure of at least standard height, or by a deckhouse of the 
same height and of equivalent strength;
    (7) The breadth of the trunk is at least 60 percent of the breadth 
of the vessel; and,
    (8) Where there is no superstructure, the length of the trunk is at 
least 0.6L.
    (b) The full length of an efficient trunk reduced in the ratio of 
its mean breadth to B shall be its effective length.
    (c) The standard height of a trunk is the standard height of a 
superstructure other than a raised quarter deck.
    (d) Where the height of a trunk is less than the standard height, 
its effective length shall be reduced in the ratio of the actual to the 
standard height. Where the height of hatchway coamings on the trunk deck 
is less than that required under Sec. 42.15-25(a), a reduction from the 
actual height of trunk shall be made which corresponds

[[Page 46]]

to the difference between the actual and required height of coaming.

[CGFR 68-60, 33 FR 10065, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9015, June 5, 1969]



Sec. 42.20-60   Deduction for superstructures and trunks.

    (a) Where the effective length of superstructures and trunks is 
1.0L, the deduction from the freeboard shall be 14 inches at 79 feet 
length of vessel, 34 inches at 279 feet length, and 42 inches at 400 
feet length and above; deductions at intermediate lengths shall be 
obtained by linear interpolation.
    (b) Where the total effective length of superstructures and trunks 
is less than 1.0L the deduction shall be a percentage obtained from 
Table 42.20-60(b)(1) or Table 42.20-60(b)(2):

                      Table 42.20-60(b)(1)--Percentage of Deduction For Type ``A'' Vessels                      
----------------------------------------------------------------------------------------------------------------
                                                 Total effective length of superstructures and trunks           
                                    ----------------------------------------------------------------------------
                                       0     0.1L   0.2L   0.3L   0.4L   0.5L   0.6L   0.7L   0.8L   0.9L   1.0L
----------------------------------------------------------------------------------------------------------------
 Percentage of deduction for all                                                                                
 types of superstructures\1\.......      0      7     14     21     31     41     52     63   75.3   87.7   100 
----------------------------------------------------------------------------------------------------------------
\1\Percentages at intermediate lengths of superstructures and trunks shall be obtained by linear interpolation. 


                      Table 42.20-60(b)(2)--Percentage of Deduction for Type ``B'' Vessels                      
                                          [Percentage of deduction\1\]                                          
----------------------------------------------------------------------------------------------------------------
                                             Total effective length of superstructures and trunks               
                             -----------------------------------------------------------------------------------
                               Line    0     0.1L   0.2L   0.3L   0.4L   0.5L   0.6L   0.7L   0.8L   0.9L   1.0L
----------------------------------------------------------------------------------------------------------------
 Vessels with forecastle and                                                                                    
 without detached bridge....      I      0      5     10     15   23.5     32     46     63   75.3   87.7    100
  Vessels with forecasle and                                                                                    
 detached bridge............     II      0    6.3   12.7     19   27.5     36     46     63   75.3   87.7   100 
----------------------------------------------------------------------------------------------------------------
\1\Percentages at intermediate lengths of superstructures and trunks shall be obtained by linear interpolation. 

    (c) For vessels of Type ``B'':
    (1) Where the effective length of a bridge is less than 0.2L, the 
percentages shall be obtained by linear interpolation between lines I 
and II;
    (2) Where the effective length of a forecastle is more than 0.4L, 
the percentages shall be obtained from line II; and,
    (3) Where the effective length of a forecastle is less than 0.07L, 
the percentages in Table 42.20-60(b)(2) of this paragraph shall be 
reduced by:

                            5(0.07L-f)/0.07L

L is the length of vessel as defined in Sec. 42.13-15(a),
f is the effective length of the forecastle.

[CGFR 68-60, 33 FR 10065, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9015, June 5, 1969]



Sec. 42.20-65   Sheer.

    (a) General. (1) The sheer shall be measured from the deck at side 
to a line of reference drawn parallel to the keel through the sheer line 
amidships.
    (2) In vessels designed with a rake of keel, the sheer shall be 
measured in relation to a reference line drawn parallel to the design 
load waterline.
    (3) In flush deck vessels and in vessels with detached 
superstructures the sheer shall be measured at the freeboard deck.
    (4) In vessels with topsides of unusual form in which there is a 
step or break in the topsides, the sheer shall be considered in relation 
to the equivalent depth amidships.
    (5) In vessels with a superstructure of standard height which 
extends over the whole length of the freeboard deck, the sheer shall be 
measured at the superstructure deck. Where the height exceeds the 
standard the least difference (Z) between the actual and standard 
heights shall be added to each end ordinate. Similarly, the intermediate 
ordinates at distances of \1/6\L and \1/3\L from each perpendicular 
shall be increased by 0.444Z and 0.111Z respectively.

[[Page 47]]

    (6) Where the deck of an enclosed superstructure has at least the 
same sheer as the exposed freeboard deck, the sheer of the enclosed 
portion of the freeboard deck shall not be taken into account.
    (7) Where an enclosed poop or forecastle is of standard height with 
greater sheer than that of the freeboard deck, or is of more than 
standard height, an addition to the sheer of the freeboard deck shall be 
made as provided in paragraph (c)(4) of this section.
    (b) Standard sheer profile. (1) The ordinates of the standard sheer 
profile are given in Table 42.20-65(b)(1):

                                  Table 42.20-65(b)(1)--Standard Sheer Profile                                  
                                              [Where L is in feet]                                              
----------------------------------------------------------------------------------------------------------------
                                            Station          Ordinate (in inches)   Ordinate (in inches)  Factor
----------------------------------------------------------------------------------------------------------------
After half.........................  After Perpendicular..  0.1..................  L+10.................      1 
                                     \1/6\ L from A.P.....  0.0444...............  L+4.44...............      3 
                                     \1/3\ L from A.P.....  0.0111...............  L+1.11...............      3 
                                     Amidships............  .....................  0....................      1 
----------------------------------------------------------------------------------------------------------------
Forward half.......................  Amidships............  .....................  0....................      1 
                                     \1/3\ L from F.P.....  0.0222...............  L+2.22...............      3 
                                     \1/6\ L from F.P.....  0.0888...............  L+8.88...............      3 
                                     Forward Perpendicular  0.2..................  L+20.................      1 
----------------------------------------------------------------------------------------------------------------

    (c) Measurement of variation from standard sheer profile. (1) Where 
the sheer profile differs from the standard, the four ordinates of each 
profile in the forward or after half shall be multiplied by the 
appropriate factors given in the table of ordinates. The difference 
between the sums of the respective products and those of the standard 
divided by 8 measures the deficiency or excess of sheer in the forward 
or after half. The arithmetical mean of the excess or deficiency in the 
forward and after halves measures the excess or deficiency of sheer.
    (2) Where the after half of the sheer has an excess and the forward 
half of the sheer has a deficiency, no credit shall be allowed for the 
part in excess and deficiency only shall be measured.
    (3) Where the forward half of the sheer profile exceeds the 
standard, and the after portion of the sheer profile is not less than 75 
percent of the standard, credit shall be allowed for the part in excess; 
where the after part is less than 50 percent of the standard, no credit 
shall be given for the excess sheer forward. Where the after sheer is 
between 50 percent and 75 percent of the standard, intermediate 
allowances may be granted for excess sheer forward.
    (4) Where sheer credit is given for a poop or forecastle, the 
following formula shall be used:

                              s=(y/3)(L'/L)

where:
s=sheer credit, to be deducted from the deficiency or added to the 
excess of sheer.
y=difference between actual and standard height of superstructure at the 
end ordinate.
L'=mean enclosed length of poop or forecastle up to a maximum length of 
0.5L.
L=length of vessel as defined in Sec. 42.13-15(a).

    (i) The formula in this paragraph (c)(4) of this section provides a 
curve in the form of a parabola tangent to the actual sheer curve at the 
freeboard deck and intersecting the end ordinate at a point below the 
superstructure deck a distance equal to the standard height of a 
superstructure. The superstructure deck shall not be less than standard 
height above this curve at any point. This curve shall be used in 
determining the sheer profile for forward and after halves of the 
vessel.
    (d) Correction for variations from standard sheer profile. (1) The 
correction for sheer shall be the deficiency or excess of sheer (see 
paragraphs (c) (1) to (4) inclusive of this section) multiplied by:

                               0.75-(S/2L)

where:
S is the total length of enclosed superstructures.

    (e) Addition for deficiency in sheer. (1) Where the sheer is less 
than the standard, the correction for deficiency in sheer (see paragraph 
(d)(1) of this section) shall be added to the freeboard.
    (f) Deduction for excess sheer. (1) In vessels where an enclosed 
superstructure covers 0.1L before and 0.1L abaft amidships, the 
correction for excess of sheer as calculated under the provisions of 
paragraph (d)(1) of this section shall be deducted from the freeboard; 
in vessels where no enclosed

[[Page 48]]

superstructure covers amidships, no deduction shall be made from the 
freeboard; where an enclosed superstructure covers less than 0.1L before 
and 0.1L abaft amidships, the deduction shall be obtained by linear 
interpolation. The maximum deduction for excess sheer shall be at the 
rate of 1\1/2\ inches per 100 feet of length.

[CGFR 68-60, 33 FR 10066, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.20-70   Minimum bow height.

    (a) The bow height defined as the vertical distance at the forward 
perpendicular between the waterline corresponding to the assigned summer 
freeboard and the designed trim and the top of the exposed deck at side 
shall be not less than:
    (1) For vessels below 820 feet in length,

             0.672L[1-(L/1640)][1.36/(Cb+0.68)] inches;

where:
L is the length of the vessel in feet.
Cb is the block coefficient which is to be taken as not less than 
0.68.

    (2) For vessels of 820 feet and above in length,

                   275.6[1.36/(Cb+0.68)] inches;

where:
    Cb is the block coefficient which is to be taken as not less 
than 0.68.

    (b) Where the bow height required in paragraph (a) of this section 
is obtained by sheer, the sheer shall extend for at least 15 percent of 
the length of the vessel measured from the forward perpendicular. Where 
it is obtained by fitting a superstructure, such superstructure shall 
extend from the stem to a point at least 0.07L abaft the forward 
perpendicular, and it shall comply with the following requirements:
    (1) For vessels not over 328 feet in length it shall be enclosed as 
defined in Sec. 42.13-15(j); and,
    (2) For vessels over 328 feet in length it need not comply with 
Sec. 42.13-15(j) but shall be fitted with closing appliances to the 
satisfaction of the assigning authority.
    (c) Vessels which, to suit exceptional operational requirements, 
cannot meet the requirements of paragraphs (a) and (b) of this section 
may be given special consideration by the assigning authority.

[CGFR 68-60, 33 FR 10066, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.20-75  Minimum freeboards.

    (a) Summer freeboard. (1) The minimum freeboard in summer must be 
the freeboard derived from the tables in Sec. 42.20-15 as modified by 
the corrections in Secs. 42.20-3 and 42.20-5, as applicable, and 
Secs. 42.20-20, 42.20-25, 42.20-30, 42.20-35, 42.20-60, 42.20-65 and, if 
applicable, Sec. 42.20-70.
    (2) The freeboard in salt water, as calculated in accordance with 
paragraph (a)(1) of this section, but without the correction for deck 
line, as provided by Sec. 42.20-35, shall not be less than 2 inches. For 
vessels having in position 1 hatchways with covers which do not comply 
with the requirements of Secs. 42.15-25(d)(1), 42.15-30, or 42.15-80, 
the freeboard shall be not less than 6 inches.
    (b) Tropical freeboard. (1) The minimum tropical freeboard shall be 
the freeboard obtained by a deduction from the summer freeboard of one 
forty-eighth of the summer draft measured from the top of the keel to 
the center of the ring of the load line mark.
    (2) The freeboard in salt water, as calculated in accordance with 
paragraph (b)(1) of this section, but without the correction for deck 
line, as provided by Sec. 42.20-35, shall not be less than 2 inches. For 
vessels having in position 1 hatchways with covers which do not comply 
with the requirements of Sec. 42.15-25(d)(1), Sec. 42.15-30, or 
Sec. 42.15-80, the freeboard shall be not less than 6 inches.
    (c) Winter freeboard. (1) The minimum winter freeboard shall be the 
freeboard obtained by an addition to the summer freeboard of one forty-
eighth of summer draft, measured from the top of the keel to the center 
of the ring of the load line mark.
    (d) Winter North Atlantic freeboard. (1) The minimum freeboard for 
vessels of not more than 328 feet in length which enter any part of the 
North Atlantic defined in Sec. 42.30-35 during the winter seasonal 
period shall be the winter

[[Page 49]]

freeboard plus 2 inches. For other vessels the winter North Atlantic 
freeboard shall be the winter freeboard.
    (e) Fresh water freeboard. (1) The minimum freeboard in fresh water 
of unit density shall be obtained by deducting from the minimum 
freeboard in salt water:

                         (/40 T) inches

where:
=displacement in salt water in tons at the summer load 
waterline; and,
T=tons per inch immersion in salt water at the summer load waterline.

    (2) Where the displacement at the summer load waterline cannot be 
certified, the deduction shall be one forty-eighth of summer draft, 
measured from the top of the keel to the center of the ring of the load 
line mark.

[CGFR 68-60, 33 FR 10066, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969; CGD 79-153, 48 FR 38650, Aug. 25, 1983]



    Subpart 42.25--Special Requirements for Vessels Assigned Timber 
                               Freeboards



Sec. 42.25-1   Application of this subpart.

    (a) The provisions of this subpart 42.25 apply only to vessels to 
which timber load lines are assigned.

[CGFR 68-60, 33 FR 10067, July 12, 1968]



Sec. 42.25-5   Definitions of terms used in this subpart.

    (a) Timber deck cargo. The term ``timber deck cargo'' means a cargo 
of timber carried on an uncovered part of a freeboard or superstructure 
deck. The term does not include wood pulp or similar cargo.
    (b) Timber load line. A timber deck cargo may be regarded as giving 
a vessel a certain additional buoyancy and a greater degree of 
protection against the sea. For that reason, vessels carrying a timber 
deck cargo may be granted a reduction of freeboard calculated according 
to the provisions of Sec. 42.25-20 and marked on the vessel's side in 
accordance with the provisions of Sec. 42.13-30(c) and (d). However, in 
order that such special freeboard may be granted and used, the timber 
deck cargo shall comply with certain conditions which are laid down in 
Sec. 42.25-15, and the vessel itself shall also comply with certain 
conditions relating to its construction which are set out in Sec. 42.25-
10.

[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.25-10   Construction of vessel.

    (a) Superstructure. (1) Vessels, shall have a forecastle of at least 
standard height and a length of at least 0.07L. In addition, if the 
vessel is less than 328 feet in length, a poop of at least standard 
height, or a raised quarter deck with either a deckhouse or a strong 
steel hood of at least the same total height shall be fitted aft.
    (b) Double bottom tanks. (1) Double bottom tanks where fitted within 
the midship half length of the vessel shall have adequate watertight 
longitudinal subdivision.
    (c) Bulwarks. (1) The vessel shall be fitted either with permanent 
bulwarks at least 39\1/2\ inches in height, specially stiffened on the 
upper edge and supported by strong bulwark stays attached to the deck 
and provided with necessary freeing ports, or with efficient rails of 
the same height and of specially strong construction.

[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.25-15   Stowage.

    (a) General. (1) Openings in the weather deck over which cargo is 
stowed shall be securely closed and battened down. The ventilators shall 
be efficiently protected.
    (2) Timber deck cargo shall extend over at least the entire 
available length which is the total length of the well or wells between 
superstructures. Where there is no limiting superstructure at the after 
end, the timber shall extend at least to the after end of the aftermost 
hatchway. The timber shall be stowed as solidly as possible, to at least 
the standard height of a superstructure other than a raised quarter 
deck.
    (3) On a vessel within a seasonal winter zone in winter, the height 
of the deck cargo above the weather deck shall not exceed one-third of 
the extreme breadth of the vessel.

[[Page 50]]

    (4) The timber deck cargo shall be compactly stowed, lashed, and 
secured. It shall not interfere in any way with the navigation and 
necessary work of the vessel.
    (b) Upright. (1) Uprights, when required by the nature of the 
timber, shall be of adequate strength considering the breadth of the 
vessel; the spacing shall be suitable for the length and character of 
timber carried, but shall not exceed 9.8 feet. Strong angles or metal 
sockets or equally efficient means shall be provided for securing the 
uprights.
    (c) Lashings. (1) Timber deck cargo shall be efficiently secured 
throughout its length by independent overall lashings spaced not more 
than 9.8 feet apart. Eye plates for these lashings shall be efficiently 
attached to the sheer strake or to the deck stringer plate at intervals 
of not more than 9.8 feet. The distance from an end bulkhead of a 
superstructure to the first eye plate shall be not more than 6.6 feet. 
Eye plates and lashings shall be provided 23\1/2\ inches and 4.9 feet 
from the ends of timber deck cargoes where there is no bulkhead.
    (2) Lashings shall be not less than \3/4\-inch close link chain or 
flexible wire rope of equivalent strength, fitted with sliphooks and 
turnbuckles, which shall be accessible at all times. Wire rope lashings 
shall have a short length of long link chain to permit the length of 
lashings to be regulated.
    (3) When timber is in lengths less than 11.8 feet the spacing of the 
lashings shall be reduced or other suitable provisions made to suit the 
length of timber.
    (4) All fittings required for securing the lashings shall be of 
strength corresponding to the length of the lashings.
    (d) Stability. (1) Provision shall be made for a safe margin of 
stability at all stages of the voyage, regard being given to additions 
of weight, such as those due to absorption of water and icing and to 
losses of weight such as those due to consumption of fuel and stores.
    (e) Protection of crew, access to machinery spaces, etc. (1) In 
addition to the requirements of Sec. 42.15-75(e) guardrails or life 
lines spaced not more than 13 inches apart vertically shall be provided 
on each side of the deck cargo to a height of at least 39\1/2\ inches 
above the cargo.
    (f) Steering arrangements. (1) Steering arrangements shall be 
effectively protected from damage by cargo and, as far as practicable, 
shall be accessible. Efficient provision, shall be made for steering in 
the event of a breakdown in the main steering arrangements.

[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.25-20  Computation for freeboard.

    (a) The minimum summer freeboards must be computed in accordance 
with Secs. 42.20-5 (a) and (b), 42.20-13, 42.20-15, 42.20-20, 42.20-25, 
42.20-30, 42.20-35, 42.20-60, and 42.20-65, except that Sec. 42.20-60 is 
modified by substituting the percentages in Table 42.25-20(a) for those 
given in Sec. 42.20-60:


                          Table 42.25-20(a)--Percentage of Deduction for Superstructure                         
                                   [Total Effective Length of Superstructure]                                   
----------------------------------------------------------------------------------------------------------------
                                       0     0.1L   0.2L   0.3L   0.4L   0.5L   0.6L   0.7L   0.8L   0.9L   1.0L
----------------------------------------------------------------------------------------------------------------
 Percentage of deduction for all                                                                                
 types of superstructure\1\........     20     31     42     53     64     70     76     82     88     94   100 
----------------------------------------------------------------------------------------------------------------
\1\Percentages at intermediate lengths of superstructures shall be obtained by linear interpolation.            

    (b) The winter timber freeboard shall be obtained by adding to the 
summer timber freeboard one thirty-sixth of the molded summer timber 
draft.
    (c) The winter North Atlantic timber freeboard shall be the same as 
the winter North Atlantic freeboard prescribed in Sec. 42.20-75(d)(1).
    (d) The tropical timber freeboard shall be obtained by deducting 
from the summer timber freeboard one forty-eighth of the molded summer 
timber draft.

[[Page 51]]

    (e) The fresh water timber freeboard shall be computed in accordance 
with Sec. 42.20-75(e) (1) or (2) based on the summer timber load 
waterline.

[CGFR 68-60, 33 FR 10067, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969; CGD 79-153, 48 FR 38650, Aug. 25, 1983]



            Subpart 42.30--Zones, Areas, and Seasonal Periods



Sec. 42.30-1   Basis.

    (a) The zones and areas in this subpart are, in general, based on 
the following criteria:
    (1) Summer: not more than 10 percent winds of force 8 Beaufort (34 
knots) or more.
    (2) Tropical: not more than 1 percent winds of force 8 Beaufort (34 
knots) or more. Not more than one tropical storm in 10 years in an area 
of 5 deg. square in any 1 separate calendar month.
    (b) In certain special areas, for practical reasons, some degree of 
relaxation has been found acceptable.
    (c) A chart is attached to the International Convention on Load 
Lines, 1966, which illustrates the zones and areas defined in this 
Convention and in this subpart.

[CGFR 68-60, 33 FR 10068, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.30-5   Northern Winter Seasonal Zones and area.

    (a) North Atlantic Winter Seasonal Zones I and II. (1) The North 
Atlantic Winter Seasonal Zone I lies within the meridian of longitude 
50 deg. W. from the coast of Greenland to latitude 45 deg. N.; thence 
the parallel of latitude 45 deg. N. to longitude 15 deg. W.; thence the 
meridian of longitude 15 deg. W. to latitude 60 deg. N.; thence the 
parallel of latitude 60 deg. N. to the Greenwich Meridian, thence this 
meridian northwards.
    (i) Seasonal periods:

    Winter: October 16 to April 15.
    Summer: April 16 to October 15.

    (2) The North Atlantic Winter Seasonal Zone II lies within the 
meridian of longitude 68 deg.30' W. from the coast of the United States 
to latitude 40 deg. N.; thence the rhumb line to the point latitude 
36 deg. N., longitude 73 deg. W.; thence the parallel of latitude 
36 deg. N. to longitude 25 deg. W.; and thence the rhumb line to Cape 
Torinana. Excluded from this zone are the North Atlantic Winter Seasonal 
Zone I and the Baltic Sea bounded by the parallel of the latitude of The 
Skaw in the Skagerrak.
    (i) Seasonal periods:

    Winter: November 1 to March 31.
    Summer: April 1 to October 31.

    (b) North Atlantic Winter Seasonal Area. (1) The boundary of the 
North Atlantic Winter Seasonal Area is the meridian of longitude 
68 deg.30' W. from the coast of the United States to latitude 40 deg. 
N.; thence the rhumb line to the southernmost intersection of the 
meridian of longitude 61 deg. W. with the coast of Canada; and thence 
the east coasts of Canada and the United States.
    (i) Seasonal periods:
    (a) For vessels over 328 feet in length:

    Winter: December 16 to February 15.
    Summer: February 16 to December 15.

    (b) For vessels of 328 feet and under in length:

    Winter: November 1 to March 31.
    Summer: April 1 to October 31.

    (c) North Pacific Winter Seasonal Zone. The southern boundary of the 
North Pacific Winter Seasonal Zone is the parallel of latitude 50 deg. 
N. from the east coast of the Union of Soviet Socialist Republics, to 
the west coast of Sakhalin; thence the west coast of Sakhalin to the 
southern extremity of Cape Kril'on: thence the rhumb line to Wakkanai, 
Hokkaido, Japan; thence the east and south coasts of Hokkaido to 
longitude 145 deg. E., thence the meridian of longitude 145 deg. E. to 
latitude 35 deg. N., thence the parallel of latitude 35 deg. N. to 
longitude 150 deg. W. and thence the rhumb line to the southern 
extremity of Dall Island, Alaska.
    (1) Seasonal periods:

    Winter: October 16 to April 15.
    Summer: April 16 to October 15.

[CGFR 68-60, 33 FR 10068, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.30-10   Southern Winter Seasonal Zone.

    (a) The northern boundary of the Southern Winter Seasonal Zone is 
the

[[Page 52]]

rhumb line from the east coast of the American continent at Cape Tres 
Puntas to the point latitude 34 deg. S., longitude 50 deg. W.; thence 
the parallel of latitude 34 deg. S. to longitude 17 deg. E.; thence the 
rhumb line to the point latitude 35 deg.10' S., longitude 20 deg. E.; 
thence the rhumb line to the point latitude 34 deg. S. longitude 28 deg. 
E.; thence along the rhumb line to the point latitude 35 deg.30' S., 
longitude 118 deg. E.; thence the rhumb line to Cape Grim on the 
northwest coast of Tasmania; thence along the north and east coasts of 
Tasmania to the southernmost point of Bruny Island; thence the rhumb 
line to Black Rock Point on Stewart Island; thence the rhumb line to the 
point latitude 47 deg. S., longitude 170 deg. E.; thence along the rhumb 
line to the point latitude 33 deg. S., longitude 170 deg. W.; and thence 
the parallel of latitude 33 deg. S. to the west coast of the American 
continent.
    (1) Valparaiso is to be considered as being on the boundary line of 
the Summer and the Winter Seasonal Zones.
    (2) Seasonal periods:

    Winter: April 16 to October 15.
    Summer: October 16 to April 15.

[CGFR 68-60, 33 FR 10068, July 12, 1968]



Sec. 42.30-15   Tropical Zone.

    (a) Northern boundary of the Tropical Zone. The northern boundary of 
the Tropical Zone is the parallel of latitude 13 deg. N. from the east 
coast of the American continent to longitude 60 deg. W.; thence the 
rhumb line to a point in latitude 10 deg. N., longitude 58 deg. W.; 
thence the parallel of latitude 10 deg. N. to longitude 20 deg. W.; 
thence the meridian of longitude 20 deg. W. to latitude 30 deg. N.; 
thence the parallel of latitude 30 deg. N. to the west coast of Africa; 
from the east coast of Africa the parallel of latitude 8 deg. N. to 
longitude 70 deg. E.; thence the meridian of longitude 70 deg. E. to 
latitude 13 deg. N.; thence the parallel of latitude 13 deg. N. to the 
west coast of India; thence around the south coast of India to latitude 
10 deg.30' N. on the east coast of India; thence the rhumb line to a 
point in latitude 9 deg. N., longitude 82 deg. E.; thence the meridian 
of longitude 82 deg. E. to latitude 8 deg. N.; thence the parallel of 
latitude 8 deg. N. to the west coast of Malaysia; thence the coast of 
Southeast Asia to the east coast of Vietnam at latitude 10 deg. N.; 
thence the parallel of latitude 10 deg. N. to longitude 145 deg. E.; 
thence the meridian of longitude 145 deg. E. to latitude 13 deg. N.; and 
thence the parallel of latitude 13 deg. N. to the west coast of the 
American continent.
    (1) Saigon is to be considered as being on the boundary line of the 
Tropical Zone and the Seasonal Tropical Area.
    (b) Southern boundary of the Tropical Zone. The southern boundary of 
the Tropical Zone is the rhumb line from the Port of Santos, Brazil, to 
the point where the meridian of longitude 40 deg. W. intersects the 
Tropic of Capricorn; thence the Tropic of Capricorn to the west coast of 
Africa; from the east coast of Africa the parallel of latitude 20 deg. 
S. to the west coast of Madagascar; thence the west and north coasts of 
Madagascar to longitude 50 deg. E.; thence the meridian of longitude 
50 deg. E. to latitude 10 deg. S.; thence the parallel of latitude 
10 deg. S. to longitude 98 deg. E.; thence the rhumb line to Port 
Darwin, Australia; thence the coasts of Australia and Wessel Island 
eastwards to Cape Wessel; thence the parallel of latitude 11 deg. S. to 
the west side of Cape York; from the east side of Cape York the parallel 
of latitude 11 deg. S. to longitude 150 deg. W.; thence the rhumb line 
to the point latitude 26 deg. S., longitude 75 deg. W.; and thence the 
rhumb line to the west coast of the American continent at latitude 
30 deg. S.
    (1) Coquimbo and Santos are to be considered as being on the 
boundary line of the Tropical and Summer Zones.
    (c) Areas to be included in the Tropical Zone. The following areas 
are to be treated as included in the Tropical Zone:
    (1) The Suez Canal, the Red Sea, and the Gulf of Aden, from Port 
Said to the meridian of longitude 45 deg. E.
    (i) Aden and Berbera are to be considered as being on the boundary 
line of the Tropical Zone and the Seasonal Tropical Area.
    (2) The Persian Gulf of the meridian of longitude 59 deg. E.
    (3) The area bounded by the parallel of latitude 22 deg. S. from the 
east coast of Australia to the Great Barrier Reef, thence the Great 
Barrier Reef to latitude 11 deg. S. The northern boundary of

[[Page 53]]

the area is the southern boundary of the Tropical Zone.

[CGFR 68-60, 33 FR 10068, July 12, 1968]



Sec. 42.30-20   Seasonal Tropical Areas.

    The following are Seasonal Tropical Areas:
    (a) In the North Atlantic. It is an area bounded on the north by the 
rhumb line from Cape Catoche, Yucatan, to Cape San Antonio, Cuba, the 
north coast of Cuba to latitude 20 deg. N., thence the parallel of 
latitude 20 deg. N. to longitude 20 deg. W.; on the west by the coast of 
the American continent; on the south and east by the northern boundary 
of the Tropical Zone.
    (1) Seasonal periods:

    Tropical: November 1 to July 15.
    Summer: July 16 to October 31.

    (b) In the Arabian Sea. An area bounded on the west by the coast of 
Africa, the meridian of longitude 45 deg. E. in the Gulf of Aden, the 
coast of South Arabia and the meridian of longitude 59 deg. E. in the 
Gulf of Oman; on the north and east by the coasts of Pakistan and India; 
on the south by the northern boundary of the Tropical Zone.
    (1) Seasonal periods:

    Tropical: September 1 to May 31.
    Summer: June 1 to August 31.

    (c) In the Bay of Bengal. The Bay of Bengal north of the northern 
boundary of the Tropical Zone.
    (1) Seasonal periods:

    Tropical: December 1 to April 30.
    Summer: May 1 to November 30.

    (d) In the South Indian Ocean. (1) An area bounded on the north and 
west by the southern boundary of the Tropical Zone and the east coast of 
Madagascar; on the south by the parallel of latitude 20 deg. S.; on the 
east by the rhumb line from a point in latitude 20 deg. S., longitude 
50 deg. E., to a point in latitude 15 deg. S., longitude 51 deg.30' E., 
and thence by the meridian of longitude 51 deg.30' E. to latitude 
10 deg. S.
    (i) Seasonal periods:

    Tropical: April 1 to November 30.
    Summer: December 1 to March 31.

    (2) An area bounded on the north by the southern boundary of the 
Tropical Zone; on the east by the coast of Australia; on the south by 
the parallel of latitude 15 deg. S. from longitude 51 deg.30' E., to 
longitude 120 deg. E. and thence the meridian of longitude 120 deg. E. 
to the coast of Australia; on the west by the meridian of longitude 
51 deg.30' E.
    (i) Seasonal periods:

    Tropical: May 1 to November 30.
    Summer: December 1 to April 30.

    (e) In the China Sea. An area bounded on the west and north by the 
coasts of Vietnam and China from latitude 10 deg. N. to Hong Kong; on 
the east by the rhumb line from Hong Kong to the Port of Sual (Luzon 
Island), and the west coasts of the Islands of Luzon, Samar, and Leyte 
to latitude 10 deg. N.; on the south by the parallel of latitude 10 deg. 
N.
    (1) Hong Kong and Sual are to be considered as being on the boundary 
of the Seasonal Tropical Area and Summer Zone.
    (2) Seasonal periods:

    Tropical: January 21 to April 30.
    Summer: May 1 to January 20.

    (f) In the North Pacific. (1) An area bounded on the north by the 
parallel of latitude 25 deg. N.; on the west by the meridian of 
longitude 160 deg. E.; on the south by the parallel of latitude 13 deg. 
N.; on the east by the meridian of longitude 130 deg. W.
    (i) Seasonal periods:

    Tropical: April 1 to October 31.
    Summer: November 1 to March 31.

    (2) An area bounded on the north and east by the west coast of the 
American continent; on the west by the meridian of longitude 123 deg. W. 
from the coast of the American continent to latitude 33 deg. N., 
longitude 123 deg. W.; to the point latitude 13 deg. N., longitude 
105 deg. W.; on the south by the parallel of latitude 13 deg. N.
    (i) Seasonal periods:

    Tropical: March 1 to June 30, and November 1 to November 30.
    Summer: July 1 to October 31, and December 1 to February 28/29.

    (g) In the South Pacific. (1) The Gulf of Carpentaria south of 
latitude 11 deg. S.
    (i) Seasonal periods:

    Tropical: April 1 to November 30.
    Summer: December 1 to March 31.

    (2) An area bounded on the north and east by the southern boundary 
of the Tropical Zone; on the south by the

[[Page 54]]

Tropic of Capricorn from the east coast of Australia to longitude 
150 deg. W.; thence by the meridian of longitude 150 deg. W. to latitude 
20 deg. S. and thence by the parallel of latitude 20 deg. S. to the 
point where it intersects the southern boundary of the Tropical Zone; on 
the west by the boundaries of the area within the Great Barrier Reef 
included in the Tropical Zone, and by the east coast of Australia.
    (i) Seasonal periods:

    Tropical: April 1 to November 30.
    Summer: December 1 to March 31.

[CGFR 68-60, 33 FR 10068, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.30-25   Summer Zones.

    (a) The remaining areas constitute the Summer Zones.
    (1) However, for vessels of 328 feet and under in length, the area 
bounded on the north and west by the east coast of the United States; on 
the east by the meridian of longitude 68 deg.30' W. from the coast of 
the United States to latitude 40 deg. N. and thence by the rhumb line to 
the point latitude 36 deg. N., longitude 73 deg. W.; on the south by the 
parallel of latitude 36 deg. N.; is a Winter Seasonal Area.
    (i) Seasonal periods:

    Winter: November 1 to March 31.
    Summer: April 1 to October 31.

[CGFR 68-60, 33 FR 10069, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.30-30   Enclosed seas.

    (a) Baltic Sea. This sea bounded by the parallel of latitude of The 
Skaw in the Skagerrak is included in the Summer Zones.
    (1) However, for vessels of 328 feet and under in length, it is a 
Winter Seasonal Area.
    (i) Seasonal periods:

    Winter: November 1 to March 31.
    Summer: April 1 to October 31.

    (b) Black Sea. This sea is included in the Summer Zones.
    (1) However, for vessels of 328 feet and under in length, the area 
north of latitude 44 deg. N. is a Winter Seasonal Area.
    (i) Seasonal periods:

    Winter: December 1 to February 28/29.
    Summer: March 1 to November 30.

    (c) Mediterranean. This sea is included in the Summer Zones.
    (1) However, for vessels of 328 feet and under in length, the area 
bounded on the north and west by the coasts of France and Spain and the 
meridian of longitude 3 deg. E. from the coast of Spain to latitude 
40 deg. N.; on the south by the parallel of latitude 40 deg. N. from 
longitude 3 deg. E. to the west coast of Sardinia; on the east by the 
west and north coasts of Sardinia from latitude 40 deg. N. to longitude 
9 deg. E., thence by the meridian of longitude 9 deg. E. to the south 
coast of Corsica, thence by the west and north coasts of Corsica to 
longitude 9 deg. E. and thence by the rhumb line to Cape Sicie; is a 
Winter Seasonal Area.
    (i) Seasonal periods:

    Winter: December 16 to March 15.
    Summer: March 16 to December 15.

    (d) Sea of Japan. This sea south of the parallel of latitude 50 deg. 
N. is included in the Summer Zones.
    (1) However, for vessels of 382 feet and under in length, the area 
between the parallel of latitude 50 deg. N. and the rhumb line from the 
east coast of Korea at latitude 38 deg. N. to the west coast of 
Hokkaido, Japan, at latitude 43 deg.12' N., is a Winter Seasonal Area.
    (i) Seasonal periods:

    Winter: December 1 to February 28/29.
    Summer: March 1 to November 30.

[CGFR 68-60, 33 FR 10069, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9016, June 5, 1969]



Sec. 42.30-35   The Winter North Atlantic Load Line.

    (a) The part of the North Atlantic referred to in Sec. 42.20-
75(d)(1) comprises:
    (1) That part of the North Atlantic Winter Seasonal Zone II which 
lies between the meridians of 15 deg. W. and 50 deg. W.; and
    (2) The whole of the North Atlantic Winter Seasonal Zone I, the 
Shetland Islands to be considered as being on the boundary.

[CGFR 68-60, 33 FR 10069, July 12, 1968]

[[Page 55]]



           Subpart 42.50--Load Line Certificates--Model Forms



Sec. 42.50-1   General.

    (a) The provisions of this subpart set forth the requirements for 
the text of the various load line certificates issued to vessels 
complying with the applicable requirements in this part. See 
Secs. 42.07-35 and 42.07-40 for requirements regarding load line 
assigning and issuing authorities. See Sec. 42.07-45 for requirements 
regarding load line certificates, their text and arrangement.
    (b) The 1966 international load line certificate and exemption 
certificate shall be the same as set forth in this subpart in the model 
Forms A1, A2, A3, and E1, except for the following authorized variations 
which shall also apply to model Forms B, C1, C2, and C3:
    (1) As indicated in Sec. 42.13-30, the freeboards and load line 
marks which are not applicable to a specific vessel need not be entered 
on the certificate issued.
    (2) The provisions of Note 3 on the front of the certificate forms 
(other than Model E1) may be changed to correctly describe the situation 
applicable to the vessel concerning information and instructions 
furnished the master about loading and ballasting the vessel to provide 
a guide as to stability under various conditions and as to avoid 
unacceptable stresses in the vessel's structure.
    (c) In the load line certificate the assigning and issuing authority 
shall set forth its full official designation; i.e., its legal name, 
address of home office, and reference to the authorization from the 
Commandant where an assigning and issuing authority other than the 
American Bureau of Shipping is designated.

[CGFR 68-126, 34 FR 9017, June 5, 1969]



Sec. 42.50-5   International load line certificates.

    (a) The various forms of certificates certifying to the correctness 
of the load line marks assigned under the regulations in this subchapter 
and/or certain exemptions therefrom for U.S.-flag vessels engaged in 
foreign voyages, or engaged in coastwise or intercoastal voyages 
(provided such vessels qualify to engage in foreign voyages without 
restriction), are A1, A2, A3, and E1. The detailed application of these 
forms is as specified in Sec. 42.07-45 (e), (f), and (h).
    (b) The text and arrangement of the printed portions of Form A1 
(printed front and back) are as follows:


               International Load Line Certificate (1966)

[Form A1]---------------------------------------------------------------
(Official seal of issuing authority.)
(Certificate No. --------)

    Issued under the provisions of the International Convention on Load 
Lines, 1966, under the authority of the Government of the United States 
of America, and the Commandant, U.S. Coast Guard:
By
........................................................................
(Insert full official designation of issuing authority)-----------------

------------------------------------------------------------------------
and duly authorized for assigning purposes under the provisions of the 
Convention.

----------------------------------------------------------------------------------------------------------------
                                                                                          Length (L) as defined 
             Name of ship                 Official number or        Port of registry      in Article 2(8) i.e., 
                                         distinctive letters                                 46 CFR 42.13-15    
----------------------------------------------------------------------------------------------------------------
Freeboard assigned as:\1\              A new ship.............  Type of ship:\1\         Type ``A''.            
                                       An existing ship.......                           Type ``B''.            
                                                                                         Type ``B'' with reduced
                                                                                          freeboard.            
                                                                                         Type ``B'' with        
                                                                                          increased freeboard.  
                          FREEBOARD FROM DECK LINE                                       LOAD LINE              
                                                                                                                
Tropical.............................  ------(inches).........  (T)....................  ------(inches) above   
                                                                                          (S).                  
Summer...............................  ------(inches).........  (S)....................  Upper edge of line at  
                                                                                          level of center of    
                                                                                          ring.                 
Winter...............................  ------(inches).........  (W)....................  ------(inches) below   
                                                                                          (S).                  
Winter (North Atlantic)..............  ------(inches).........  (WNA)..................  ------(inches) below   
                                                                                          (S).                  
Allowance for fresh water for all freeboards...........................................  ------(inches).        
----------------------------------------------------------------------------------------------------------------


[[Page 56]]

(All measurements are to upper edge of the respective horizontal lines)-
    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------ deck at 
side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.004

    Date of initial or periodical 
survey..................................................
    This is to certify that this ship has been surveyed and that the 
freeboards have been assigned and load lines shown above have been 
marked in accordance with the International Convention on Load Lines, 
1966.
    This certificate is valid until ------------,\2\ subject to annual 
surveys in accordance with Article 14(1)(c) of the Convention, and 
endorsement thereof on the reverse side of the certificate.
    Issued at ------------ (Place of issue of certificate), --------, 
19-- (Date of issue)

------------------------------------------------------------------------
(Signature of official issuing the certificate)-------------------------

                                                                          
                      [Seal of issuing authority]    

    The undersigned declares that he is duly authorized by the said 
Government to issue this certificate.

                                                                          
                  (Signature)            


                                  notes

    1. When a ship departs from a port situated on a river or inland 
waters, deeper loading shall be permitted corresponding to the weight of 
fuel and all other materials required for consumption between the point 
of departure and the sea.
    2. When a ship is in fresh water of unit density, the appropriate 
load line may be submerged by the amount of the fresh water allowance 
shown above. Where the density is other than unity, an allowance shall 
be made proportional to the difference between 1.025 and the actual 
density.
    3. It is the owner's responsibility to furnish the master with 
information and instructions for loading and ballasting this vessel to 
provide guidance as to stability of the vessel under varying conditions 
of service and to avoid unacceptable stresses in the vessel's structure.

    \1\The issuing authority is authorized to delete or change words 
whenever it is inapplicable to a specific vessel and to arrange wording 
so appropriate word insertions may be made, which accurately describe 
the facts.
    \2\At the expiration of this certificate, applicable reissuance 
should be obtained in accordance with the Load Line Regulations.


                      (Reverse Side of Certificate)

                             annual surveys

    This is to certify that at an annual survey required by Article 
14(1)(c) of the Convention, this ship was found to comply with the 
relevant provisions of the Convention.

  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
                                                                        
                   extension of load line certificate                   
                                                                        
The provisions of the Convention being fully complied with by this ship,
the validity of this certificate is, in accordance with Article 19(2) of
                    the Convention, extended until.                     
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
                                                                        


[[Page 57]]

                                  notes

    4. The Winter North Atlantic Load Line applies only to vessels of 
328 feet in length or less, which enter any part of the North Atlantic 
Ocean during the winter months as defined by the Load Line Regulations 
in 46 CFR 42.30-5 and 42.30-35. The periods during which the other 
seasonal load lines apply in different parts of the world are as stated 
in the Load Line Regulations in 46 CFR 42.30-5 to 42.30-30, inclusive.
    5. The Load Line Certificate will be canceled by the Commandant, 
U.S. Coast Guard, if:
    (a) The annual surveys have not been carried out within 3 months 
either way of each anniversary of the certificate date.
    (b) The certificate is not endorsed to show that the ship has been 
surveyed as indicated in (a).
    (c) Material alterations have been made to the hull or 
superstructure of the vessel, such as would necessitate the assignment 
of an increased freeboard.
    (d) The fittings and appliances for the protection of the openings, 
guardrails, freeing ports, or the means of access to the crew's quarters 
have not been maintained in as effective a condition as they were when 
the certificate was issued.
    (e) The structural strength of the ship is lowered to such an extent 
that the ship is unsafe.
    6. When this certificate has expired or has been canceled, it must 
be delivered to the issuing authority.

------------------------------------------------------------------------


               International Load Line Certificate (1966)

[Form A2]---------------------------------------------------------------
*    *    *    *    *    *    *-----------------------------------------

                                                                                                                
                                         FREEBOARD FROM DECK                                                    
                                                 LINE                                           LOAD LINE       
                                                                                                                
Tropical                                                                                                        
Summer...............................  ------ (inches)........  .......................  Upper edge of line at  
                                                                                          level of center of    
                                                                                          ring.                 
Winter                                                                                                          
Winter--North Atlantic...............  ------ (inches)........  (WNA)..................  Upper edge of line     
                                                                                          ------ (inches) below 
                                                                                          upper edge at level of
                                                                                          center of ring.       
  Allowance for fresh water for all freeboards.........................................  ------ (inches).       
                                                                                                                

(All measurements are to upper edge of the respective horizontal lines)-
    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------------ 
deck at side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.005

*    *    *    *    *    *    *-----------------------------------------
    \1\The issuing authority is authorized to delete or change words 
whenever it is inapplicable to a specific vessel and to arrange wording 
so appropriate word insertions may be made, which accurately describe 
the facts.

------------------------------------------------------------------------


               International Load Line Certificate (1966)

[Form A3]---------------------------------------------------------------
*    *    *    *    *    *    *-----------------------------------------
    The timber freeboards given in this certificate are applicable only 
when this ship carries a timber deck cargo and complies with special 
requirements of the Load Line Regulations regarding timber deck cargoes.

[[Page 58]]



                                                                                                                
                                         FREEBOARD FROM DECK                                                    
                                                 LINE                                           LOAD LINE       
                                                                                                                
Tropical.............................  ------(inches).........  (T)....................  ------(inches) above   
                                                                                          (S).                  
Summer...............................  ------(inches).........  (S)....................  Upper edge of line at  
                                                                                          level of center of    
                                                                                          ring.                 
Winter...............................  ------(inches).........  (W)....................  ------(inches) below   
                                                                                          (S).                  
Winter--North Atlantic...............  ------(inches).........  (WNA)..................  ------(inches) below   
                                                                                          (S)                   
Timber--tropical.....................  ------(inches).........  (LT)...................  ------(inches) above   
                                                                                          (LS).                 
Timber--summer.......................  ------(inches).........  (LS)...................  ------(inches) above   
                                                                                          (S).                  
Timber--winter.......................  ------(inches).........  (LW)...................  ------(inches) below   
                                                                                          (LS).                 
Timber--winter--North Atlantic.......  ------(inches).........  (LWNA).................  ------(inches) below   
                                                                                          (LS).                 
  Allowance for fresh water for all freeboards other than timber.......................  ------(inches).        
  Allowance for fresh water for all timber freeboards..................................  ------(inches).        
                                                                                                                

(All measurements are to upper edge of the respective horizontal lines)-

    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------------ 
deck at side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.006

*    *    *    *    *    *    *-----------------------------------------
    \1\The issuing authority is authorized to delete or change words 
whenever it is inapplicable to a specific vessel and to arrange wording 
so appropriate word insertions may be made, which accurately describe 
the facts.

------------------------------------------------------------------------


              International Load Line Exemption Certificate

[Form E1]---------------------------------------------------------------
(Official seal of issuing authority.)
(Certificate No. ------)
    Issued under the provisions of the International Convention on Load 
Lines, 1966, under the authority of the Government of the United States 
of America, and the Commandant U.S. Coast Guard:
By......................................................................
(Insert full official designation of issuing authority)-----------------

........................................................................
and duly authorized for assigning and exemption purposes under the 
provisions of the Convention.

------------------------------------------------------------------------
                                  Official numbers of                   
         Name of ship             distinctive letters   Port of registry
------------------------------------------------------------------------
                                                                        
                                                                        
------------------------------------------------------------------------

    This is to certify that the above-mentioned ship is exempted from 
the provisions of the 1966 Convention, under the authority conferred by 
Article 6(2),\1\ Article 6(4),\1\ of the Convention referred to above 
and that this ship has been surveyed accordingly.
    The provisions of the Convention from which the ship is exempted 
under Article 6(2) are:

........................................................................
........................................................................
    The voyage for which exemption is granted under Article 6(4) is:
From:...................................................................
To:.....................................................................
    Conditions, if any, on which the exemption is granted under either 
Article 6(2) or Article 6(4):

........................................................................
........................................................................

[[Page 59]]

    This certificate is valid until ------------,\2\ subject, where 
appropriate, to annual surveys in accordance with Article 14(1)(c) of 
the Convention, and endorsement thereof on the reverse side of the 
certificate.

Issued at
(Place of issue of certificate)-----------------------------------------
                                                                       
(Date of issue).--------------------------------------------------------

........................................................................
(Signature of official issuing the certificate)-------------------------

                                                                          
                        [Seal of issuing authority]

    The undersigned declares that he is duly authorized by the said 
Government to issue this certificate.

                                                                          
                                      (Signature)
    \1\The issuing authority is authorized to delete whichever reference 
is inapplicable.
    \2\At the expiration of this certificate, applicable reissuance 
should be obtained in accordance with the Load Line Regulations, if 
permitted.
(Reverse side of exemption certificate)---------------------------------


                             annual surveys

    This is to certify that this ship continues to comply with the 
conditions under which this exemption was granted.

  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
                                                                        

                   extension of load line certificate

    This ship continues to comply with the conditions under which this 
exemption was granted and the validity of this certificate is, in 
accordance with Article 19(4)(a) of the Convention, extended until.

  Place............................  Date......  .......................
                                                                        
                                                                        
                (Signature and seal of issuing authority)               
                                                                        

[CGFR 68-60, 33 FR 10070, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9017, June 5, 1969]


Sec. 42.50-10    Load line certificates for nonadherent foreign flag 
        vessels.


                          Load Line Certificate

(Form B)----------------------------------------------------------------
(Official seal of issuing authority.)
(Certificate No. ------)
    Issued under the authority of the Commandant, U.S. Coast Guard, 
United States of America, under the provisions of the Load Line Act of 
March 2, 1929, as amended (46 U.S.C. 85-85g), and the Load Line 
Regulations in 46 CFR part 42:
By......................................................................
(Insert full official designation of issuing authority)-----------------
and duly authorized for assigning purposes under the provisions of the 
Load Line Act of March 2, 1929, as amended.

[[Page 60]]

*    *    *    *    *    *    *-----------------------------------------
    This is to certify that this ship has been surveyed and the 
freeboards have been assigned and load lines shown above have been 
marked upon the vessel in manner and location as required by the Load 
Line Regulations of the Commandant, U.S. Coast Guard, in 46 CFR part 42.
    This certificate remains in force until ------------,\2\ subject to 
annual revalidation in accordance with the Load Line Regulations, and 
endorsement thereof on the reverse side of this certificate.

    Issued at ------------ (Place of issue of certificate), --------, 
19-- (Date of issue)

                                                                    
(Signature of official issuing the certificate)-------------------------
                                                                          
                        [Seal of issuing authority]
*    *    *    *    *    *    *-----------------------------------------
    \2\Expiration date is not to exceed 5 years from original date of 
issue of this certificate. At expiration applicable reissuance of this 
certificate should be obtained in accordance with the Load Line 
Regulations.
*    *    *    *    *    *    *-----------------------------------------
(Reverse Side of Certificate)-------------------------------------------


                   annual revalidation of certificate

    This is to certify that the provisions of the Load Line Regulations 
of the Commandant, U.S. Coast Guard, are fully complied with by the 
condition of this ship on the dates indicated, and in each case this 
certificate is revalidated for a 1 year interval as follows:

  (1) Until..................                                           
  Place......................  Date...........    ..................    
                                                    (Signature and      
                                                 seal of issuing        
                                                 authority)             
  (1) Until..................                                           
  Place......................  Date...........    ..................    
                                                    (Signature and      
                                                 seal of issuing        
                                                 authority)             
  (1) Until..................                                           
  Place......................  Date...........    ..................    
                                                    (Signature and      
                                                 seal of issuing        
                                                 authority)             
  (1) Until..................                                           
  Place......................  Date...........    ..................    
                                                    (Signature and      
                                                 seal of issuing        
                                                 authority)             
                                                                        

[CGFR 68-126, 34 FR 9017, June 5, 1969]


Sec. 42.50-15    Coastwise load line certificates for U.S.-flag vessels.


                     Coastwise Load Line Certificate

[Form C1]---------------------------------------------------------------
(Official seal of issuing authority.)
(Certificate No. ------)
    Issued under the authority of the Commandant, U.S. Coast Guard, 
under the provisions of the Coastwise Load Line Act, 1935, as amended 
(46 U.S.C. 88-88g), and the Load Line Regulations in 46 CFR part 42:
By......................................................................
(Insert full official designation of issuing authority)-----------------

........................................................................
and duly authorized for assigning purposes under the provisions of this 
law for vessels engaging in coastwise and/or intercoastal voyages.

----------------------------------------------------------------------------------------------------------------
                                          Official number or                              Length (L) as defined 
             Name of ship                distinctive letters        Port or registry        in 46 CFR 42.13-15  
----------------------------------------------------------------------------------------------------------------
Freeboard assigned as:\1\............  A new ship.............  Type of ship:\1\.......  Type ``A''.            
                                       An existing ship.......                           Type ``B''.            
                                                                                         Type ``B'' with reduced
                                                                                          freeboard.            
                                                                                         Type ``B'' with        
                                                                                          increased freeboard.  
                                                                                                                
                                                                  freeboard from deck           load line       
                                                                          line                                  
                                                                                                                
Tropical.............................  ------(inches).........  (T)....................  ------(inches) above   
                                                                                          (S).                  

[[Page 61]]

                                                                                                                
Summer...............................  ------(inches).........  (S)....................  ------Upper edge of    
                                                                                          line at level of      
                                                                                          center of ring.       
Winter...............................  ------(inches).........  (W)....................  ------(inches) below   
                                                                                          (S).                  
  Allowance for fresh water for all freeboards.........................................  ------(inches)         
----------------------------------------------------------------------------------------------------------------

(All measurements are to upper edge of the respective horizontal lines)-
    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------------ 
deck at side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.007

*    *    *    *    *    *    *-----------------------------------------
Date of initial or periodical survey....................................
    The following is a record of the restrictions applicable to the 
above named ship:

........................................................................
(List restrictions. If none, insert ``None.'')--------------------------

........................................................................
    This is to certify that this ship has been surveyed and that the 
freeboards have been assigned and load lines shown above have been 
marked in accordance with the Commandant, U.S. Coast Guard, Coastwise 
Load Line Regulations in 46 CFR parts 42 to 46, inclusive as applicable.
    This certificate remains in force until ------------,\2\ subject to 
annual surveys in accordance with applicable Load Line Regulations, and 
endorsement thereof on the reverse side of the certificate.

Issued at...............................................................
(Place of issue of certificate)                        (Date of issue)--

              By--------------------------------------------------------
........................................................................
                                     (Signature of official issuing the 
certificate)    --------------------------------------------------------
                                                                          
      [Seal of issuing authority]---------------------------------------


                                  notes

    1. When a ship departs from a port situated on a river or inland 
waters, deeper loading shall be permitted corresponding to the weight of 
fuel and all other materials required for consumption between the point 
of departure and the sea.
    2. When a ship is in fresh water of unit density the appropriate 
load line may be submerged by the amount of the fresh water allowance 
shown above. Where the density is other than unity, an allowance shall 
be made proportional to the difference between 1.025 and the actual 
density.
    3. It is the owner's responsibility to furnish the master with 
information and instructions for loading and ballasting this vessel to 
provide guidance as to stability of the vessel under varying conditions 
of service and to avoid unacceptable stresses in the vessel's structure.

    \1\The issuing authority is authorized to delete or change words 
inapplicable to a specific vessel and to arrange wording so appropriate 
word insertions may be made, which accurately describe the facts.
    \2\At the expiration of this certificate, applicable reissuance 
should be obtained in accordance with the Load Line Regulations.
(Reverse side of Coastwise Load Line Certificate)-----------------------


                             annual surveys

    This is to certify that this ship has been surveyed on the dates 
indicated to determine in each case whether this certificate should 
remain in force for an additional 1 year and the survey has been 
completed to my satisfaction.

(1)............................    ...............    ...............   
     Signature of Surveyor             Place               Date         
(2)............................    ...............    ...............   
     Signature of Surveyor             Place               Date         
(3)............................    ...............    ...............   
     Signature of Surveyor             Place               Date         
(4)............................    ...............    ...............   
     Signature of Surveyor             Place               Date         
                                                                        


[[Page 62]]

                   extension of load line certificate

    The provisions of the Coastwise Load Line Regulations of the 
Commandant, U.S. Coast Guard, being fully complied with by this ship, 
this certificate is extended under the authority of 46 CFR 42.07-45 and 
42.09-15 until.

  Place............................  Date......  .......................
                                     ..........  .......................
                                                                        
                                                                        
          (Name of issuing authority and signature of Surveyor)         
                                                                        

                                  notes

    4. The periods and areas during which the seasonal load lines apply 
are as stated in the Load Line Regulations in 46 CFR Subpart 42.30, as 
appropriate.
    5. This Coastwise Load Line Certificate will be canceled by the 
Commandant, U.S. Coast Guard, if:
    (a) The annual surveys have not been carried out within three months 
either way of each anniversary of the certificate date.
    (b) The certificate is not endorsed to show that the ship has been 
surveyed as indicated in (a).
    (c) Material alterations have been made to the hull or 
superstructure of the vessel, such as would necessitate the assignment 
of an increased freeboard.
    (d) The fittings and appliances for the protection of the openings, 
guardrails, freeing ports, or the means of access to the crew's quarters 
have not been maintained in as effective a condition as they were when 
the certificate was issued.
    (e) The structural strength of the ship is lowered to such an extent 
that the ship is unsafe.
    6. When this certificate has expired or has been canceled, it must 
be delivered to the issuing authority.
*    *    *    *    *    *    *-----------------------------------------

------------------------------------------------------------------------
    (d) The text and arrangement of the printed portion of Form C2 shall 
be identical with the information on the face and revese sides of Form 
C1 certificate in paragraph (c) of this section except for the 
identification of model form, description of the ``Freeboard from deck 
line'', the ``Load Line'', and the illustration of load line marks, 
which shall be as follows:


                     Coastwise Load Line Certificate

[Form C2]---------------------------------------------------------------
*    *    *    *    *    *    *-----------------------------------------

                                                                        
                                  freeboard from deck                   
                                         line               load line   
                                                                        
Tropical......................  ------(inches)........  Upper edge of   
  Summer......................  ......do..............   line at level  
  Winter......................  ......do..............   center of ring.
                                                            Do.         
  Allowance for fresh water for all freeboards........  ------(inches). 
                                                                        

(All measurements are to upper edge of the respective horizontal lines)-
    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------------ 
deck at side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.008

*    *    *    *    *    *    *-----------------------------------------
    (e) The text and arrangement of the printed portion of Form C3 shall 
be identical with the information on the face and reverse sides of Form 
C1 certificate in paragraph (c) of this section except for the 
identification of model form, description of the ``Freeboard from deck 
line,'' the ``Load Line,'' and the illustration of load line marks, 
which shall be as follows:


                     Coastwise Load Line Certificate

[Form C3]---------------------------------------------------------------
*    *    *    *    *    *    *-----------------------------------------
    The timber freeboards given in this certificate are applicable only 
when this ship carries a timber deck cargo and complies with the special 
requirements of the Load Line Regulations regarding timber deck cargoes.

[[Page 63]]



                                                                                                                
                                         freeboard from deck                                                    
                                            line load line                                      load line       
                                                                                                                
Tropical.............................  ------(inches).........  (T)....................  ------(inches) above   
                                                                                          (S).                  
Summer...............................  ------(inches).........  (S)....................  Upper edge of line at  
                                                                                          level of center of    
                                                                                          ring.                 
Winter...............................  ------(inches).........  (W)....................  ------(inches) below   
                                                                                          (S).                  
Timber--tropical.....................  ------(inches).........  (LT)...................  ------(inches) above   
                                                                                          (LS).                 
Timber--summer.......................  ------(inches).........  (LS)...................  ------(inches) above   
                                                                                          (S).                  
Timber--winter.......................  ------(inches).........  (LW)...................  ------(inches) below   
                                                                                          (LS).                 
  Allowance for fresh water for all freeboards other than timber.......................  ------(inches).        
  Allowance for fresh water for all timber freeboards..................................  ------(inches).        
                                                                                                                

(All measurements are to upper edge of the respective horizontal lines)-
    The upper edge of the deck line from which these freeboards are 
measured is ------ inches above or below the top of the ------------ 
deck at side; i.e., freeboard\1\ deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.009

                     *    *    *    *    *    *    *

    \1\The issuing authority is authorized to delete or change words 
inapplicable to a specific vessel and to arrange wording so appropriate 
word insertions may be made, which accurately describe the facts.

[CGFR 68-60, 33 FR 10073, July 12, 1968, as amended by CGFR 68-126, 34 
FR 9018, June 5, 1969]
      



PART 43--[RESERVED]






PART 44--SPECIAL SERVICE LIMITED DOMESTIC VOYAGES--Table of Contents




                        Subpart A--Administration

Sec.
44.01-1  Establishment of load lines for special services.
44.01-5  Administration; special service.
44.01-10  Approval by Commandant, U.S. Coast Guard, of special service.
44.01-11  Assignment and marking load lines; special service.
44.01-12  Voyage limits; special service.
44.01-13  Heavy weather plan.
44.01-15  Special service certificate.
44.01-20  New and existing vessels; special service.

        Subpart B--Rules for Assigning Special Service Load Lines

44.05-1  General.
44.05-5  Definitions.
44.05-10  Load line markings.
44.05-15  Existing vessels.
44.05-20  Conditions of assignment.
44.05-25  Freeboards.
44.05-30  Load line certificate.
44.05-35  Form of load line certificate.

   Subpart C--Rules for Assigning Working Freeboards to Hopper Dredges

44.300  Applicability.
44.310  Definitions.
44.320  Submission of plans and calculations.
44.330  Obtaining working freeboards for hopper dredges.
44.340  Operating restrictions.

    Authority: 46 U.S.C. 5115; 49 CFR 1.46.

    Source: CGFR 65-50, 30 FR 16755, Dec. 30, 1965, unless otherwise 
noted.



                        Subpart A--Administration



Sec. 44.01-1   Establishment of load lines for special services.

    (a) Load lines are established for steam colliers, tugs, barges, and 
self-propelled barges engaged in special services in conformity with the 
Coastwise Load Line Act, 1935, as amended (46 U.S.C. 88-88i).
    (b) Load lines for steam colliers, barges, and self-propelled barges 
engaged on specially limited coastwise voyages as described in 
Sec. 44.01-12 shall be established pursuant to the regulations in this 
part.

[[Page 64]]

    (c) Variance for tugs is not permitted.



Sec. 44.01-5   Administration; special service.

    (a) The administrative provisions of Secs. 42.01-1 to 42.11-20 
inclusive of this subchapter, relating to vessels engaged in foreign and 
coastwise voyages, where applicable, shall apply to vessels subject to 
this part except as modified in paragraph (b) of this section.
    (b) Application for the assignment of load lines under this part for 
the types of vessels described in Sec. 44.01-1 shall be made in writing 
to the American Bureau of Shipping unless another society has been 
specifically approved by the Commandant as a load line assigning 
authority. In the latter case application shall be made to the society 
so approved. Applications shall state the following information:
    (1) Name of vessel and official number.
    (2) Type of vessel (steam collier, barge, or self-propelled barge).
    (3) Date keel was laid.
    (4) Normal sea speed of vessel.
    (5) Limits of voyage for which approval is requested.
    (6) Normal maximum distance offshore in course of voyage.
    (7) Length of voyage in days and nautical miles.
    (8) Statement of weather conditions to be expected.
    (9) Cargo to be carried.
    (10) Whether vessel is to be operated manned or unmanned.

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10076, July 12, 1968]



Sec. 44.01-10   Approval by Commandant, U.S. Coast Guard, of special service.

    (a) Subject to the conditions contained in this part, the 
Commandant, U.S. Coast Guard, has determined that load lines at variance 
from the position fixed by the International Convention on Load Lines, 
1966, but not above the actual line of safety, may be assigned steam 
colliers, barges, or self-propelled barges (separately by class) for 
certain specifically limited coastwise voyages between ports of the 
continental United States or between islands of a group over which the 
United States has jurisdiction.

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10076, July 12, 1968]



Sec. 44.01-11   Assignment and marking load lines; special service.

    (a) The assignment and marking of special service load lines and 
certifications thereof shall be in accordance with this part to the 
satisfaction of the American Bureau of Shipping. The load line 
certificate shall define the voyage limits and seasonal restrictions 
governing the validity of the load lines.



Sec. 44.01-12   Voyage limits; special service.

    (a) Special service load lines may be assigned for operation not 
more than a specified limited distance offshore which shall not exceed 
20 nautical miles. The offshore distance shall be measured from the 
coastline except where a line of inland waters has been otherwise 
established.
    (b) For continental United States ports, special service load lines 
may be issued for operation between but not to exceed the extreme port 
limits specified below, or for operation between intermediate ports 
within the extreme limits specified:
    (1) Central and Northern Atlantic Coast--From Norfolk, Virginia, to 
Eastport, Maine.
    (2) Southeast Atlantic Coast--from Key West, Florida, to 
Jacksonville, Florida, except that the special service load line is not 
valid for manned vessels during the hurricane season, i.e., July 1st to 
November 15th, both dates inclusive, unless the vessel is operated in 
accordance with a Coast Guard approved heavy weather plan.
    (3) Gulf of Mexico Coast--from the mouth of the Rio Grande River, 
Texas, to Key West, Florida, except that the special service load line 
is not valid for manned vessels during the hurricane season, i.e., July 
1st to November 15th, both dates inclusive, unless the vessel is 
operated in accordance with a Coast Guard approved heavy weather plan.
    (4) Pacific Coast--From San Francisco, California, to San Diego, 
California.

[[Page 65]]

    (c) Assignment of special service load lines for voyage limits 
between the islands of a group over which the United States has 
jurisdiction shall be made only upon authorization by the Commandant, 
U.S. Coast Guard, after submittal to him of the information called for 
by Sec. 44.01-5(b).

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGD 79-142, 45 FR 
57402, Aug. 28, 1980]



Sec. 44.01-13  Heavy weather plan.

    (a) Each heavy weather plan under Sec. 44.01-12(b) must be prepared 
by the vessel owner or operator and approved by the cognizant Officer in 
Charge, Marine Inspection. Approval of a heavy weather plan is limited 
to the current hurricane season.
    (b) The cognizant Officer in Charge, Marine Inspection, is--
    (1) The Officer in Charge, Marine Inspection, within whose area the 
work site is located for a vessel that will be operating in a limited 
geographical area; or
    (2) The Officer in Charge, Marine Inspection, within whose area the 
point of departure is located for a transiting vessel.
    (c) The required content of the heavy weather plan is determined on 
a case-by-case basis by the cognizant Officer in Charge, Marine 
Inspection, based on knowledge of the local conditions. The heavy 
weather plan may contain weather radio frequencies and time schedules 
for seeking a harbor of safe refuge. A single heavy weather plan may be 
accepted for more than one vessel operating at a single work site or on 
a single route.
    (d) The vessel owner or operator must place a copy of the heavy 
weather plan on each vessel to which it applies and ensure that it 
remains there throughout the hurricane season.

[CGD 79-142, 45 FR 57402, Aug. 28, 1980]



Sec. 44.01-15   Special service certificate.

    (a) The use of the special service load line certificate issued 
under this part is limited to voyages only as described in the 
certificate. If the vessel engages on any voyage not contemplated by the 
certificate where a load line is required, the load line prescribed by 
part 42 of this subchapter shall govern.
    (b) Vessels engaged on special services in the coastwise trade and 
the interisland trade will be certificated on the form shown in 
Sec. 44.05-35.

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10076, July 12, 1968]



Sec. 44.01-20   New and existing vessels; special service.

    (a) A new vessel marked with load lines for special service on a 
coastwise or inter-island voyage is a vessel whose keel was laid on or 
after September 28, 1937. An existing vessel is one whose keel was laid 
before that date.



        Subpart B--Rules for Assigning Special Service Load Lines



Sec. 44.05-1   General.

    (a) The load line regulations in this part are complementary to 
those in part 42 or part 45 (Great Lakes load line regulations) of this 
subchapter, as reference is made thereto.

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10076, July 12, 1968]



Sec. 44.05-5   Definitions.

    (a) A steam collier is a vessel mechanically propelled, and 
specially designed for the carriage of coal in bulk.
    (b) A towed barge is a vessel without sufficient means of self-
propulsion and which requires to be towed.
    (c) A self-propelled barge is a vessel mechanically propelled of the 
type specially designed for use in limited coastwise and Great Lakes 
service and capable of transiting interconnecting canals.



Sec. 44.05-10  Load line markings.

    (a) The load line marks on the vessel's sides must be in accordance 
with Sec. 42.13-25(a) of this subchapter, except seasonal markings such 
as ``Winter North Atlantic'' which are not applicable to the voyage are 
omitted.
    (b) In the case of vessels which engage in special services on 
coastwise voyages and voyages on the Great Lakes, the marks on the 
vessel's sides are to be in accordance with Figure

[[Page 66]]

44.05-10(b), except that the lines marked ``SW'' and ``MS'' shall be 
used only where applicable.
[GRAPHIC] [TIFF OMITTED] TC01FE91.010

                           Figure 44.05-10(b).

    (c) The load lines aft of the combined disk and diamond will be 
applicable for voyages on the Great Lakes and those on the forward side 
will be applicable to limited coastwise voyages. The summer line on the 
ocean will correspond to the summer line on the Lakes and the winter 
line on the ocean will correspond to the intermediate line on the Lakes.
    (d) In the case of vessels which operate both on special service 
coastwise voyages and no unlimited coastwise voyages, the marks on the 
ship's sides are to be in accordance with figure 44.05-10 (d). The load 
lines aft of the disk will be applicable to voyages in special service 
coastwise or inter-island voyages and those on the forward side will be 
applicable to unlimited coastwise voyages. (A vessel marked for both 
special service and unlimited coastwise voyages and furnished with a 
load line certificate on the international form shall, when entering the 
foreign trade, arrange that the load line markings are in accord with 
the vessel's international load line certificate by the elimination of 
the marks aft of the disk.)
[GRAPHIC] [TIFF OMITTED] TC01FE91.011

                           Figure 45.05-10(d)

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGD 80-120, 47 FR 
5723, Feb. 8, 1982]



Sec. 44.05-15   Existing vessels.

    (a) In assigning load lines to an existing vessel the provisions of 
the regulations in this part shall be complied with in principle and 
detail insofar as is reasonable and practicable, having regard to the 
proven efficacy of existing arrangements for a special service voyage, 
and having particular regard to the provision of sufficient means for 
the protection and safety of the crew.
    (b) Where it is neither reasonable nor practicable to comply with 
this part in its entirety, the assigning authority will, in each case, 
report to the Commandant, U.S. Coast Guard, the specific matters in 
which the vessel is deficient with such recommendations as may seem 
desirable. Upon the receipt of this report the Commandant, U.S. Coast 
Guard, shall determine such addition to the freeboard as will, in the 
judgment of the Commandant, U.S. Coast Guard, make the vessel as safe as 
if it had fully complied with this part.



Sec. 44.05-20   Conditions of assignment.

    (a) Steam colliers. The conditions of assignment for steam colliers 
shall be in accordance with the requirements of part 42 of this 
subchapter, except that

[[Page 67]]

in the case of steam colliers constructed with bulwarks, the freeing 
port may be of a practically continuous slot type, located as low as 
possible, the clear area of the slot to be not less than 20 percent of 
the superficial area of the unpierced bulwarks. If, due to sheer, or 
other conditions, the assigning authority considers that extra local 
provision should be made for freeing decks of water, the slots are to be 
located so as to have maximum efficacy.
    (b) Towed barges. The conditions of assignment for towed cargo 
barges where the cargo is carried under deck shall be in accordance with 
Secs. 45.10-5 to 45.10-100 of this subchapter. In the case of tank 
barges and cargo barges carrying cargo only on deck, compliance will 
also be required with the supplementary conditions of Secs. 45.20-1 to 
45.20-70 of this subchapter. In the case of cargo barges of the open 
type, assignment will be limited to barges in unmanned operation and the 
construction of the vessel must be such as to satisfy the assigning 
authority that no unusual hazards will be experienced.
    (c) Self-propelled barges. The conditions of assignment for self-
propelled cargo barges carrying cargo under decks shall be in accordance 
with the provisions of Secs. 45.10-5 to 45.10-100 of this subchapter. In 
the case of self-propelled tank barges and self-propelled cargo barges 
carrying cargo only on deck, compliance will also be required with the 
supplementary conditions of Secs. 45.20-1 to 45.20-70 of this 
subchapter.

[CGFR 65-50, 30 FR 16755, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10076, July 12, 1968]



Sec. 44.05-25   Freeboards.

    (a) General. (1) When the assigning authority is satisfied that the 
requirements of this part as applicable to the type of vessel under 
consideration are complied with the freeboards will be computed as 
described in this section.
    (2) The requirements in Secs. 42.09-1 and 42.09-10 that relate to 
the assignment of freeboards and to stability are applicable to each 
vessel subject to the requirements in this part.
    (3) The assigning authority that assigns a vessel subject to the 
requirements in this part a freeboard under part 45 of this chapter 
shall do so in accordance with the requirements in effect as of October 
1, 1972.
    (b) Steam colliers. Steam colliers that have constructional features 
similar to those of a tanker which afford extra invulnerability against 
the sea may be assigned a reduction of freeboard from that determined 
under part 42 of this subchapter. The amount of such reduction shall be 
determined by the assigning authority, in relation to the freeboard 
assigned to tankers, having regard to the degree of compliance with the 
supplementary conditions of assignment laid down for these ships, but 
without regard to the degree of subdivision provided. The freeboard 
assigned to such a vessel shall in no case be less than would be 
assigned the vessel as a tanker, as determined under part 42 of this 
subchapter.
    (c) Towed cargo barges with cargo under deck. The freeboard is to be 
computed under Secs. 45.15-1 to 45.15-97 of this subchapter. The fresh 
water and seasonal markings where applicable are to be determined under 
part 42 of this subchapter.
    (d) Towed cargo barges with cargo only on deck. The freeboard for 
barges of this type is to be computed in accordance with the 
requirements of Secs. 45.20-1 to 45.20-70 of this subchapter. The fresh 
water and seasonal markings where applicable are to be the same as 
determined under part 42 of this subchapter.
    (e) Towed cargo barges of the open type. The load line shall be 
placed where, in the judgment of the assigning authority, the draft will 
be such that no unusual hazard will be experienced. In general, drafts 
assigned will be such that the barge will remain afloat with a 
reasonable freeboard after flooding of the net available open space.
    (f) Towed tank barges. The freeboard is to be computed in accordance 
with Secs. 45.20-1 to 45.20-70 of this subchapter. The fresh water and 
seasonal markings where applicable are to be determined under part 42 of 
this subchapter.
    (g) Self-propelled cargo barges. The freeboard is to be computed 
under Secs. 45.15-1 to 45.20-15 of this subchapter. The fresh water and 
seasonal markings where applicable are to be determined under part 42 of 
this subchapter.

[[Page 68]]

    (h) Self-propelled tank barges. The freeboard is to be computed in 
accordance with Secs. 45.20-1 to 45.20-70 of this subchapter. The fresh 
water and seasonal markings where applicable are to be determined under 
part 42 of this subchapter.

[CGFR 65-50, 30 FR 17655, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGD 73-49R, 38 FR 12290, May 10, 1973]



Sec. 44.05-30  Load line certificate.

    (a) The load line certificates for a special service coastwise or 
special inter-island voyage shall be issued in addition to any other 
applicable load line certificates and shall be on the form shown in 
Sec. 44.05-35.



Sec. 44.05-35   Form of load line certificate.

    (a) Where no other Load Line certificate is issued:

 Load Line Certificate for a Special Service Coastwise or Inter-Island 
                                 Voyage

    Issued under the authority of the Commandant, U.S. Coast Guard, 
United States of America, under the provisions of the Coastwise Load 
Line Act of August 27, 1935, as amended.
    [Seal]
Issued by_______________________________________________________________
Certificate No._________________________________________________________
    This certificate is valid only for coastwise or inter-island voyages 
that are between the limits of ----------and ------provided the vessel 
is engaged solely in the trade stated herein.

Ship____________________________________________________________________
Official No.____________________________________________________________
Port of registry________________________________________________________
Trade of vessel_________________________________________________________
Gross tonnage___________________________________________________________

                                                                        
         Freeboard from deck line                     Load line         
                                                                        
Tropical (T)..............................  Above (S).                  
Summer (S)................................  Upper edge of line through  
                                             center of disk.            
Winter (W)................................  Below (S).                  
                                                                        

*Allowance for fresh water for all freeboards (except on the Great 
---------------------------------------------------------------------------
Lakes)__________________________________________________________________

    *Where seagoing steamers navigate a river or inland water, deeper 
loading is permitted corresponding to the weight of fuel, etc., required 
for consumption between the point of departure and the open sea.
---------------------------------------------------------------------------

    The upper edge of the deck line from
which these freeboards are measured is__________________________________
inches above the top of the----deck at side.
[GRAPHIC] [TIFF OMITTED] TC01FE91.012

    This is to certify that this ship has been surveyed and the 
freeboards and load lines shown above have been found to be correctly 
marked upon the vessel in manner and location as provided by the Load 
Line Regulations of the Commandant, U.S. Coast Guard, applicable to 
vessels engaged on this special service voyage.

    **This certificate remains in force until ------------------. Issued 
at ------------------on the -------- day of ------------, 19----.

    **Upon the expiration of the certificate renewal must be obtained as 
provided by the Load Line Regulations and the certificate so endorsed. 
Endorsement should also be made in the spaces provided on the occasion 
of each annual inspection required by the Load Line Regulations.

    (Here follows the signature or seal and description of the assigning 
---------------------------------------------------------------------------
authority)

    Notes: (1) In accordance with the Load Line Regulations, the disk or 
diamond and the lines must be permanently marked by center punch marks 
or cutting.
    (2) The load line assignment given by this certificate necessarily 
assumes that the nature and stowage of cargo, balast, etc., are such as 
to secure sufficient stability for the vessel. Accordingly, it is the 
owner's responsibility to furnish the Master of the vessel with 
stability information and instructions when this is necessary to 
maintenance of sufficient stability.
    (On the reverse side of the load line certificate, the provision for 
annual inspection endorsement and for renewal of the certificate is to 
be the same as for vessels engaged in the foreign trade.)

    (b) Where the Special Service Load Line Certificate is issued in 
addition to a Great Lakes Load Line Certificate, the wording of the 
Special Service Load Line Certificate is to be identical to that given 
in paragraph (a) of this section, but the markings indicated in the form 
shall be replaced by the following markings:

[[Page 69]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.013


    (c) Where the Special Service Load Line Certificate is issued in 
addition to an Unlimited Coastwise or International Load Line 
Certificate, the wording of the Special Service Load Line Certificate is 
to be identical to that given in paragraph (a) of this section, but the 
markings indicated in the form shall be replaced by the following 
markings:
[GRAPHIC] [TIFF OMITTED] TC01FE91.014



   Subpart C--Rules for Assigning Working Freeboards to Hopper Dredges

    Source: CGD 76-080, 54 FR 36977, Sept. 6, 1989, unless otherwise 
noted.



Sec. 44.300  Applicability.

    This subpart applies to each self-propelled hopper dredge--
    (a) For which a working freeboard assignment is desired after 
January 1, 1990; and
    (b) That operates with a working freeboard assigned under this 
subpart.



Sec. 44.310  Definitions.

    Hopper dredge means a self-propelled dredge with an open hold or 
hopper in the hull of the dredge that receives dredged material.
    Working freeboard means one-half the distance between the mark of 
the load line assigned under this subchapter and the freeboard deck.



Sec. 44.320  Submission of plans and calculations.

    To request a working freeboard, calculations, plans, and stability 
information necessary to demonstrate compliance with this subpart must 
be submitted to the:
    (a) Commanding Officer, U.S. Coast Guard Marine Safety Center (G-
MSC), 400 Seventh Street SW., Washington, DC 20590-0001; or
    (b) American Bureau of Shipping, 45 Eisenhower Drive, Paramus, New 
Jersey 07652-0910.



Sec. 44.330  Obtaining working freeboards for hopper dredges.

    A hopper dredge may be issued a working freeboard on a limited 
service domestic voyage load line certificate or a Great Lakes load line 
certificate if the following are met:
    (a) The hopper dredge structure must have adequate strength for any 
draft up to the working freeboard draft. Dredges built and maintained in 
conformity with the requirements of a classification society recognized 
by the Commandant usually meet this requirement.
    (b) The hopper dredge must--
    (1) Meet subpart I of part 174 of this chapter; and
    (2) Have on its bridge remote draft indicators that:
    (i) Show the fore, aft, and mean draft of the dredge at all times 
while the dredge is operating; and
    (ii) Have each indicator marked with the assigned freeboard and the 
working freeboard.



Sec. 44.340  Operating restrictions.

    (a) Each hopper dredge assigned a working freeboard may be operated 
at drafts from the normal freeboard to the working freeboard if the--
    (1) Seas are not more than 10 feet;
    (2) Winds are not more than 35 knots;
    (3) Area of operation is not more than 20 nautical miles (37 
kilometers) from the mouth of a harbor of safe refuge; and
    (4) Specific gravity of the spoil carried is not more than the 
highest specific gravity of spoil used in the stability calculations 
required by subchapter S of this chapter.

[[Page 70]]

    (b) The Assigning Authority designates on the face of the dredge's 
load line certificate--
    (1) Each restriction contained in paragraph (a)(1) through (a)(3) of 
this section; and
    (2) The maximum specific gravity of the spoils allowed to be 
carried.



PART 45--GREAT LAKES LOAD LINES--Table of Contents




                           Subpart A--General

Sec.
45.1  Purpose.
45.3  Definitions.
45.5  Seasonal application of load lines.
45.9  Seasonal application of load lines for vessels not marked under 
          this part.
45.11  Issue of load line certificate.
45.13  Form of certificate.
45.15  Exemptions.

                       Subpart B--Load Line Marks

45.31  Deckline.
45.33  Diamond.
45.35  Seasonal load lines.
45.37  Salt water load lines.
45.39  Marking.

                          Subpart C--Freeboards

45.51  Types of ships.
45.53  Summer freeboard.
45.55  Freeboard coefficient.
45.57  Correction: Position of deckline.
45.58  Correction: Short superstructure.
45.59  Definitions for superstructure corrections.
45.61  Correction for superstructures and trunks.
45.63  Correction for sheer.
45.65  Excess sheer limitations.
45.67  Sheer measurement.
45.69  Correction for bow height.
45.71  Midsummer freeboard.
45.73  Winter freeboard.
45.75  Intermediate freeboard.
45.77  Salt water freeboard.

                   Subpart D--Conditions of Assignment

45.101  Purpose.
45.103  Structural stress and stability.
45.105  Information supplied to the master.
45.107  Strength of hull.
45.109  Strength of superstructures and deckhouses.
45.111  Strength of bulkheads at ends of superstructures.
45.113  Access openings in bulkheads at ends of enclosed 
          superstructures.
45.115  Bulwarks and guard rails.
45.117  Freeing port area: General.
45.119  Freeing port area; Changes from standard sheer.
45.121  Freeing port area: Changes for trunks and side coamings.
45.123  Freeing port area: Changes for bulwark height.
45.125  Crew passageways.
45.127  Position of structures, openings, and fittings.
45.129  Hull fittings: General.
45.131  Ventilators.
45.133  Air pipes.
45.135  Hull openings at or below freeboard deck.
45.137  Cargo ports.
45.139  Side scuttles.
45.141  Manholes and flush scuttles.
45.143  Hull openings above freeboard deck.
45.145  Hatchway covers.
45.147  Hatchway coamings.
45.149  Machinery space openings.
45.151  Other openings.
45.153  Through-hull piping: General.
45.155  Inlets and discharge piping: Valves.
45.157  Scuppers and gravity drains.
45.159  Special conditions of assignment for type A vessels.

           Subpart E--Unmanned River Service Dry Cargo Barges

45.171  Purpose.
45.173  Vessels subject to this subpart.
45.175  Certification.
45.177  Special operation requirements.

Appendix A to Part 45--Load Line Certificate Form

    Authority: 46 U.S.C. 5115; 49 CFR 1.46.

    Source: CGD 73-49R, 38 FR 12290, May 10, 1973, unless otherwise 
noted.



                           Subpart A--General



Sec. 45.1   Purpose.

    This part prescribes requirements for assignment of freeboards, 
issuance of loadline certificates, and marking of loadlines to meet the 
requirements of the Coastwise Load Line Act, 1935 (46 U.S.C. 88-88g) 
insofar as it applies to the Great Lakes of North America.



Sec. 45.3   Definitions.

    As used in this part:
    (a) Length (L) means 96 percent of the total length on a waterline 
at 85 percent of the least moulded depth measured from the top of the 
keel or the length from the foreside of the stem to the axis of the 
rudder stock on that waterline, if that is greater. In ships designed 
with a rake of keel the waterline on which this length is measured

[[Page 71]]

must be parallel to the designed waterline.
    (b) Perpendiculars means the forward and after perpendiculars at the 
forward and after ends of the length (L). The forward perpendicular 
coincides with the foreside of the stem on the waterline on which the 
length is measured.
    (c) Amidships means the middle of the length (L).
    (d) Breadth unless expressly provided otherwise, means the maximum 
breadth of the ship, measured amidships to the moulded line of the frame 
in a ship with a metal shell and to the outer surface of the hull in a 
ship with a shell of any other material.
    (e) Moulded Depth means the vertical distance measured amidships 
from the top of the keel to the top of the freeboard deck beam at side 
except that--
    (1) In vessels of other than metal construction, the distance is 
measured from the lower edge of the keel rabbet;
    (2) Where the form at the lower part of the midship section is of a 
hollow character, or where thick garboards are fitted, the distance is 
measured from the point where the line of the flat of the bottom 
continued inwards cuts the side of the keel;
    (3) In ships having rounded gunwales, this distance is measured to 
the point of intersection of the moulded lines of the deck and side, the 
lines extending as though the gunwale were of angular design; and
    (4) Where the freeboard deck is stepped and the raised part of the 
deck extends over the point at which the moulded depth is to be 
determined, the distance is measured to a line of reference extending 
from the lower part of the deck along a line parallel with the raised 
part.
    (f) Depth for Freeboard (D) means--
    (1) Moulded depth amidships plus the thickness of the stringer plate 
with no allowance for sheathing; and
    (2) In a vessel having a rounded gunwale with a radius greater than 
4 percent of the breadth (B) or having topsides of unsual form, the 
depth for freeboard (D) of a vessel having a midship section with 
vertical topsides and with the same round of beam and area of topside 
section equal to that provided by the actual midship section.
    (g) Freeboard means the distance measured vertically downwards 
amidships from the upper edge of the deck line to the upper edge of the 
related load line.
    (h) Freeboard Deck means, normally, the uppermost complete deck 
exposed to weather and sea that has permanent means of closing all 
openings in the weather part thereof and below which all openings in the 
sides of the ship are fitted with permanent means of watertight closings 
except that--
    (1) In a ship having a discontinuous freeboard deck, the lowest line 
of the exposed deck and the continuation of that line parallel to the 
upper part of the deck is the freeboard deck.
    (2) At the option of the owner and subject to the approval of the 
Commandant a lower deck may be designated as the freeboard deck, if it 
is a complete and permanent deck continuous in a fore and aft direction 
at least between the machinery space and peak bulkheads and continuous 
athwartships;
    (3) When this lower deck is stepped the lowest line of the deck and 
the continuation of that line parallel to the upper part of the deck is 
taken as the freeboard deck.
    (i) Superstructure means a deck structure on the freeboard deck, 
extending from side to side of the ship or with the side plating not 
being inboard of the shell plating more than 4 percent of the breadth 
(B). A raised quarterdeck is a superstructure.
    (j) Enclosed superstructure means a superstructure with enclosing 
bulkheads.
    (k) Height of a superstructure means the least vertical height 
measured at side from the top of the superstructure deck beams to the 
top of the freeboard deck beams.
    (l) Length of a superstructure (S) means the mean length of the part 
of the superstructure which extends to the sides of the vessel and lies 
within the length (L).
    (m) Flush deck ship means a ship that has no superstructure on the 
freeboard deck.
    (n) Weathertight means that in any sea conditions water will not 
penetrate into the ship.
    (o) Watertight means designed to withstand a static head of water.

[[Page 72]]

    (p) Exposed positions means exposed to weather and sea.
    (q) Intact bulkhead with respect to superstructure means a bulkhead 
with no openings.
    (r) Steel means steel and materials with which structures can be 
made equivalent to steel with respect to such parameters as yield 
strength, total deflection, flexural life, or resistance to galvanic or 
stress corrosion.



Sec. 45.5   Seasonal application of load lines.

    For the purposes of the law and regulations prohibiting submergence 
of load lines (46 U.S.C. 88c; 46 CFR 42.07-10), the fresh water and salt 
water load lines marked under this part apply during the following 
seasons:
    (a) Summer load lines apply April 16 through April 30 and September 
16 through September 30.
    (b) Except for hopper dredges operating at working freeboards in 
accordance with subpart C of part 44 of this chapter, the Assigning 
Authority may not allow for lesser freeboards.
    (c) Intermediate load lines apply October 1 through October 31 and 
April 1 through April 15.
    (d) Winter load lines apply November 1 through March 31.



Sec. 45.9   Seasonal application of load lines for vessels not marked under this part.

    (a) For the purposes of the law and regulations prohibiting 
submergence of load lines (46 U.S.C. 88c; 46 CFR 42.07-10) the marks 
assigned to vessels holding international load line certificates apply 
during the following seasons:
    (1) Vessels assigned freeboards as new vessels under the 
International Load Line Convention, 1966--
    (i) Winter--November 1 through March 31.
    (ii) Summer--April 1 through April 30 and October 1 through October 
31.
    (iii) Tropical--May 1 through September 30;
    (2) Vessels assigned freeboards as existing vessels under the 
International Load Line Convention, 1966--
    (i) Winter--November 1 through March 31;
    (ii) Summer--April 1 through April 30 and October 1 through October 
31;
    (iii) Tropical--September 16 through September 30;
    (iv) Tropical Fresh--May 1 through September 15.
    (b) Except for hopper dredges operating at working freeboards in 
accordance with subpart C of part 44 of this chapter, the Assigning 
Authority may not allow for lesser freeboards.

[CGD 73-49R, 38 FR 12290, May 10, 1973, as amended by CGD 76-080, 54 FR 
36977, Sept. 6, 1989]



Sec. 45.11   Issue of load line certificate.

    (a) A vessel 79 feet in length and more, and 150 gross tons or over, 
the keel of which is laid or which has reached a similar stage of 
construction after April 14, 1973, must meet the requirements of this 
part.
    (b) Except as prescribed in paragraph (a) of this section, any 
vessel that meets the requirements in subparts C and D of this part and 
the survey requirements in Secs. 42.09-15 through 42.09-50 of this 
subchapter is entitled to assignment of freeboards and issue of a load 
line certificate under this part by the Commandant or his authorized 
representative.
    (c) A vessel, the keel of which was laid or was at a similar stage 
of construction before April 14, 1973, that meets the requirements of 
this part that were in effect before April 14, 1973, and the survey 
requirements in Secs. 42.09-15 through 42.09-50 of this subchapter is 
entitled to the assignment of freeboards calculated under the provisions 
of this part in effect before April 14, 1973, and to a load line 
certificate issued under this part by the Commandant or his authorized 
representative.



Sec. 45.13   Form of certificate.

    The form of a load line certificate issued under this part is 
specified in appendix A to this part.



Sec. 45.15   Exemptions.

    (a) The Commandant may exempt a ship from any of the requirements in 
this part if the chairman of the board of Steamship Inspections, 
Department of Transport, Canada, and the Commandant agree that the 
sheltered nature or the condition of that voyage

[[Page 73]]

make it unreasonable or impracticable to apply requirements of this 
part.
    (b) The Commandant may exempt a vessel that embodies features of a 
novel kind from any of the requirements of this part if those 
requirements might seriously impede research into the development of 
such features and their incorporation in ships. Any such vessel must 
comply with the safety requirements that, in the opinion of the 
Commandant, are adequate for the service for which the vessel is 
intended and will insure the overall safety of the vessel. If the 
Commandant grants an exemption pursuant to this paragraph he 
communicates the details of the exemption and the reasons therefor to 
the chairman of the board of Steamship Inspections.
    (c) A vessel that is not normally engaged on voyages to which this 
part applies but that, in exceptional circumstances, is required to 
undertake a single such voyage between two specific ports may be 
exempted by the Commandant from any of the requirements of this part, if 
the ship complies with safety requirements that, in the opinion of the 
Commandant are adequate for the voyage that is to be undertaken by the 
vessel.
    (d) Any unmanned river service dry cargo barge that is operated 
between Calumet Harbor, Chicago, Illinois and Burns Harbor, Indiana and 
intermediate ports in Lake Michigan that meets the definition in subpart 
E of this part is exempt from load line and marking requirements but is 
subject to the certification and special operating requirements listed 
in subpart E.

[CGD 73-49R, 38 FR 12290, May 10, 1973, as amended by CGD 84-058, 50 FR 
19533, May 9, 1985]



                       Subpart B--Load Line Marks



Sec. 45.31   Deck line.

    (a) Each vessel must be marked with a deck line on the outer surface 
of the shell on each side of the vessel with the upper edge of the line 
passing through the point where the upper surface of the freeboard deck 
intersects the outer surface of the shell or if the summer freeboard is 
correspondingly adjusted under Sec. 45.57, the deck line may be placed 
above or below the freeboard deck. Figure 1 illustrates the deck line 
markings.
    (b) Each deck line must be at least 12-inches long and 1-inch wide.
    [GRAPHIC] [TIFF OMITTED] TC01FE91.015
    


Sec. 45.33   Diamond.

    (a) Each vessel must be marked with the diamond mark described in 
figure 2 of Sec. 45.35 amidships below the upper edge of the deck line 
on each side with the center of the loadline mark at a distance below 
the deck line equal to the summer freeboard assigned under this part.
    (b) The width of each line in the loadline mark must be 1 inch.

[[Page 74]]



Sec. 45.35   Seasonal load lines.

    Each vessel must have the summer (S), midsummer (MS), intermediate 
(I), and winter (W) loadlines for fresh water freeboards calculated 
under Secs. 45.71 through 45.75 marked in accordance with Sec. 45.39.
[GRAPHIC] [TIFF OMITTED] TC01FE91.016



Sec. 45.37   Salt water load lines.

    Each vessel that operates in the salt water of the St. Lawrence 
River must--
    (a) Be marked with the summer (S), midsummer (MS), intermediate (I) 
and winter (W) load line marks under Sec. 45.77 for salt water; and
    (b) Be marked with the letters ``FW'' above the fresh water marks 
and the letters ``SW'' above the salt water marks as described in figure 
2.



Sec. 45.39   Marking.

    (a) The diamond, lines, and letters must be painted in white or 
yellow on a dark ground or in black on a light ground and permanently 
marked on the sides of the vessel.
    (b) The upper edge of the line that passes through the center of the 
diamond must indicate summer freeboard assigned under Sec. 45.53.
    (c) Unless otherwise authorized the seasonal load lines must be 
horizontal lines extending forward of, and at right angles to, a 
vertical line marked at a distance 26 inches forward of the vertical 
centerline of the diamond as described in figure 2.
    (d) The salt water load lines must be horizontal lines extending 
abaft the vertical line required by paragraph (b) of this section as 
described in figure 2.
    (e) The upper edge of each seasonal and salt water load line mark 
must indicate the minimum freeboard for that mark.
    (f) When two freeboards assigned under this part differ by 2 inches 
or less, the line for the lesser freeboard must be omitted and the line 
for the greater freeboard must be identified with the seasonal letters 
for both freeboards.
    (g) Seasonal freeboards that are limited by a summer freeboard 
assigned under Sec. 45.53(c) must not be marked but the identifying 
letter must be marked adjacent to the summer mark.
    (h) The identity of the authority that assigns the freeboard must be 
indicated alongside the load line diamond above the horizontal line that 
passes through the center of the diamond with two initials approximately 
4\1/2\ inches high and 3 inches wide.



                          Subpart C--Freeboards



Sec. 45.51   Types of ships.

    (a) For the purpose of this subpart, a type A vessel has--
    (1) No cargo ports or similar sideshell openings below the freeboard 
deck;
    (2) Only small freeboard deck openings fitted with watertight 
gasketed hatch covers of steel;
    (3) No dimension of a freeboard deck cargo opening greater than 6 
feet and the total area not exceeding 18 ft2; and
    (4) No more than two freeboard deck cargo openings to a single cargo 
space.
    (b) For the purposes of this subpart a type B vessel is a vessel 
that does not meet the requirements in paragraph (a) of this section.



Sec. 45.53   Summer freeboard.

    (a) Except as required in paragraph (c) of this section, the minimum 
freeboard in summer for a type A vessel is F in the following formula 
modified by the corrections in this subpart:

[[Page 75]]

                      F (inches)=10.2 x P1 x D

where P1 is defined in Sec. 45.55 and D is the depth for freeboard 
in feet.

    (b) Except as required in paragraph (c) of this section, the minimum 
freeboard in summer for a type B vessel is F in the formula modified by 
the corrections in this subpart:

                       F (inches)=12 x P1 x D

where P1 is defined by Sec. 45.55 and D is the depth for freeboard 
          in feet.

    (c) Seasonal freeboards assigned under Secs. 45.71 through 45.75 
must be calculated on the basis of the summer freeboard calculated under 
paragraph (a) or (b) of this section.
    (d) If a minimum freeboard is required for a vessel under this part 
which is greater than that required by paragraph (a) or (b) of this 
section because of scantling or subdivision requirements, the summer 
freeboard and the seasonal freeboards assigned under this subpart must 
be no less than that minimum freeboard, except the midsummer seasonal 
freeboard may be calculated on the basis of the summer freeboard 
assigned under this paragraph.
    (e) If a greater than the calculated minimum freeboard is requested 
by the applicant for the load line certificate, that greater freeboard 
may be assigned as the summer freeboard and--
    (1) The intermediate and winter seasonal freeboards assigned must be 
calculated under paragraph (a) or (b) of this section; and
    (2) The midsummer seasonal freeboard must be calculated on the basis 
of the summer freeboard assigned under this paragraph.



Sec. 45.55   Freeboard coefficient.

    (a) For ships less than 350 feet in length (L), the freeboard 
coefficient is P1 in the formula:

                     P1=P+A[(L/D)-(L/Ds)]

where P is a factor, which is a function of the length from table 1 and 
``A'' is a coefficient, which is a function of length (L), from table 2; 
L/D is the ratio of the length (L) to the depth for freeboard (D); L/
Dsis the ratio of the length (L) to a standard depth (Ds) from 
table 3.
    D is not to be used as less than that which will give a ration of L 
to D that is:
    (a) More than 15 when L=400 feet or less, or
    (b) More than 21 when L=700 feet or more, with the ratio for 
intermediate lengths being calculated proportionately.

    (b) For ships 350 feet or more in length (L), the coefficient ``A'' 
is zero and the formula is:

                                P1=P

where P is a factor, which is a function of length from table (1).



Sec. 45.57   Correction: Position of deckline.

    (a) Where the depth to the upper edge of the deckline is greater or 
less than D, the difference between the depths must be added to or 
deducted from the freeboard.
    (b) When the Commandant or the approved assigning authority approves 
a location for the deckline that is above or below the freeboard deck, 
the minimum summer freeboard must be corrected by--
    (1) Adding the difference between the depth and D if the depth is 
greater than D; and
    (2) Subtracting the difference between the depth and D, if the depth 
is less than D.
    (c) Except for the adjustment allowed in paragraph (b) of this 
section, no freeboard of less than 2 in. may be assigned.



Sec. 45.58   Correction: Short superstructure.

    The minimum freeboard in summer for a type B vessel that is 79 ft. 
or more but less than 500 ft. in length and has enclosed superstructures 
with an effective length of 25 percent or less of the length of the 
vessel must be increased by--

                    0.03 (500--L) (0.25--E/L) inches

where
(L)=length of vessel in feet;
(E)=effective length of superstructure in feet as defined in Sec. 45.59.



Sec. 45.59   Definitions for superstructure corrections.

    For the purpose of Secs. 45.58 through 45.61--
    (a) The standard height of a superstructure (Hs) other than a 
raised quarter deck and the standard height of a

[[Page 76]]

trunk (Hs) is determined by the formula:

                        Hs=[6.0+(L/300)] ft

    (b) The length of superstructure (S) is the length of those parts of 
the superstructure which extends to the sides of the vessel and that lie 
within the length (L).
    (c) The effective length (E) of a trunk is its length in the ratio 
of its mean breadth to B.
    (d) The effective length (E) of an enclosed superstructure of 
standard height or greater is its length ``S''.
    (e) Where the height of an enclosed superstructure or trunk is less 
than the standard height (Hs),the effective length (E) is its 
length reduced in the ratio of its height to Hs.
    (f) The effective length (E) of a raised quarter deck of \2/3\ 
Hs or greater that has no openings in the front bulkhead is its 
length up to a maximum of 0.6L.
    (g) The effective length (E) of a raised quarter deck of less than 
\2/3\ Hs or that does not have an intact front bulkhead is its 
length reduced by the ratio of its height to Hs.


                               Table 12(1)                              
                           tables of p values                           
------------------------------------------------------------------------
                                                                Value of
                    Length of Ship (feet)                          P    
------------------------------------------------------------------------
80...........................................................     0.1100
90...........................................................     0.1136
100..........................................................     0.1172
110..........................................................     0.1208
120..........................................................     0.1244
130..........................................................     0.1281
140..........................................................     0.1318
150..........................................................     0.1355
160..........................................................     0.1393
170..........................................................     0.1430
180..........................................................     0.1468
190..........................................................     0.1506
200..........................................................     0.1545
210..........................................................     0.1583
220..........................................................     0.1622
230..........................................................     0.1661
240..........................................................     0.1700
250..........................................................     0.1740
260..........................................................     0.1780
270..........................................................     0.1820
280..........................................................     0.1860
290..........................................................     0.1900
300..........................................................     0.1941
310..........................................................     0.1982
320..........................................................     0.2023
330..........................................................     0.2065
340..........................................................     0.2106
350..........................................................     0.2148
360..........................................................     0.2190
370..........................................................     0.2233
380..........................................................     0.2275
390..........................................................     0.2318
400..........................................................     0.2361
410..........................................................     0.2400
420..........................................................     0.2437
430..........................................................     0.2472
440..........................................................     0.2506
450..........................................................     0.2537
460..........................................................     0.2567
470..........................................................     0.2595
480..........................................................     0.2621
490..........................................................     0.2645
500..........................................................     0.2667
510..........................................................     0.2688
520..........................................................     0.2706
530..........................................................     0.2723
540..........................................................     0.2738
550..........................................................     0.2751
560..........................................................     0.2762
570..........................................................     0.2772
580..........................................................     0.2779
590..........................................................     0.2785
600..........................................................     0.2788
610..........................................................     0.2790
620..........................................................     0.2790
630..........................................................     0.2789
640..........................................................     0.2785
650..........................................................     0.2779
660..........................................................     0.2772
670..........................................................     0.2768
680..........................................................     0.2760
690..........................................................     0.2751
700..........................................................     0.2740
710..........................................................     0.2728
720..........................................................     0.2715
730..........................................................     0.2700
740..........................................................     0.2684
750..........................................................     0.2667
760..........................................................     0.2648
770..........................................................     0.2628
780..........................................................     0.2607
790..........................................................     0.2584
800..........................................................     0.2560
810..........................................................     0.2532
820..........................................................     0.2504
830..........................................................     0.2476
840..........................................................     0.2448
850..........................................................     0.2420
860..........................................................     0.2392
870..........................................................     0.2364
880..........................................................     0.2336
890..........................................................     0.2308
900..........................................................     0.2280
910..........................................................     0.2252
920..........................................................     0.2224
930..........................................................     0.2196
940..........................................................     0.2168
950..........................................................     0.2140
960..........................................................     0.2112
970..........................................................     0.2084
980..........................................................     0.2056
990..........................................................     0.2028
1000.........................................................     0.2000
------------------------------------------------------------------------


                               Table 12(2)                              
                values of ``a'' for use in the expression               
                         P1=P+``A'' (L/D--L/Ds)                         
------------------------------------------------------------------------
                                                               Value of 
                   Length of Ship (feet)                        ``A''   
------------------------------------------------------------------------
80.........................................................      0.00864

[[Page 77]]

                                                                        
90.........................................................      0.00806
100........................................................      0.00750
110........................................................      0.00696
120........................................................      0.00644
130........................................................      0.00594
140........................................................      0.00546
150........................................................      0.00500
160........................................................      0.00456
170........................................................      0.00414
180........................................................      0.00374
190........................................................      0.00336
200........................................................      0.00300
210........................................................      0.00266
220........................................................      0.00234
230........................................................      0.00204
240........................................................      0.00176
250........................................................      0.00150
260........................................................      0.00126
270........................................................      0.00104
280........................................................      0.00084
290........................................................      0.00066
300........................................................      0.00050
310........................................................      0.00036
320........................................................      0.00024
330........................................................      0.00014
340........................................................      0.00006
350........................................................      0.00000
------------------------------------------------------------------------


                               Table 12(3)                              
                             values of l/ds                             
------------------------------------------------------------------------
                  Length of Ship (feet)                    Value of L/D5
------------------------------------------------------------------------
80......................................................         6.50000
90......................................................         6.76563
100.....................................................         7.03125
110.....................................................         7.29688
120.....................................................         7.56250
130.....................................................         7.82813
140.....................................................         8.09375
150.....................................................         8.35938
160.....................................................         8.62500
170.....................................................         8.89063
180.....................................................         9.19625
190.....................................................         9.42188
200.....................................................         9.68750
210.....................................................         9.95313
220.....................................................        10.21875
230.....................................................        10.48438
240.....................................................        10.75000
250.....................................................        11.01563
260.....................................................        11.28125
270.....................................................        11.54688
280.....................................................        11.81250
290.....................................................        12.07813
300.....................................................        12.34375
310.....................................................        12.60938
320.....................................................        12.87500
330.....................................................        13.14063
340.....................................................        13.40625
350.....................................................        13.67188
360.....................................................        13.93750
370.....................................................        14.20313
380.....................................................        14.46875
390.....................................................        14.73438
400.....................................................        15.00000
------------------------------------------------------------------------

    (h) Superstructures which are not enclosed have no effective length.
    (i) When a lower deck is designated as the freeboard deck, that part 
of the hull which extends above the freeboard deck is treated as a 
superstructure so far as concerns the application of the conditions of 
assignment and the calculation of freeboard.
    (j) A bridge or poop is enclosed only when access is provided 
whereby the crew may reach accommodations, machinery, or other working 
spaces inside the superstructure by alternative means that are available 
at all times when bulkhead openings are closed.



Sec. 45.61   Correction for superstructures and trunks.

    (a) Where the effective length E of superstructures and trunks that 
meet the requirements of subpart D of this part is 1.0L, the minimum 
summer freeboard may be corrected by subtracting \1/2\Hs.
    (b) Where the effective length of superstructures and trunks is less 
than 1.0L the minimum summer freeboard may be corrected by subtracting a 
percentage of one-half of the standard superstructure height (Hs) 
determined by the formula:

                     Percentage=(E/2L) (1+E/L) x 100

    (c) To be eligible for the correction a trunk must--
    (1) Be at least as strong and as stiff as a superstructure;
    (2) Have no opening in the freeboard deck in way of the trunk, 
except small access openings;
    (3) Have hatchway coamings and covers that meet Secs. 45.143 through 
45.147;
    (4) Provide a permanent working platform fore and aft with 
guardrails;
    (5) Provide fore and aft access between detached trunks and 
superstructures by permanent gangways;
    (6) Be at least 60 percent of the breadth of the ship in way of the 
trunk; and
    (7) Be at least 0.6 L in length, if no superstructure, is provided.



Sec. 45.63   Correction for sheer.

    (a) The minimum summer freeboard must be increased by the 
deficiency, or

[[Page 78]]

may be decreased by the excess as limited by Sec. 45.65, of sheer 
calculated from table 4, multiplied by:

                              0.75--(S/2L)

where S is the total length of enclosed superstructures. Trunks are not 
included.



Sec. 45.65   Excess sheer limitations.

    The decrease in freeboard allowed in Sec. 45.63 is limited as 
follows:

                                           Sheer Calculation--Table 4                                           
----------------------------------------------------------------------------------------------------------------
                 Station                        Actual ordinate         S. M.                Product            
----------------------------------------------------------------------------------------------------------------
After Half:                                                                                                     
  AP....................................  ...........................        1                                  
  L/6-AP................................  ...........................        3                                  
  L/3-AP................................  ...........................        3                                  
  Midship...............................  ...........................        1  --------------                  
                                                                                                                
                              Sum of Aft Products                                                               
                                                                                                                
  After Standard Sheer  .2665L+26.65\1\.  ...........................  .......  --------------                  
  Difference: Sum-STD...................  ...........................  .......  --------------+ Excess/-        
                                                                                 Deficiency                     
  AFT Sheer: Diff8..............  ...........................  .......  --------------  Excess/         
                                                                                 Deficiency                     
Fwd. Half:                                                                                                      
  FP....................................  ...........................        1                                  
  L/6-FP................................  ...........................        3                                  
  L/3-FP................................  ...........................        3                                  
  Midships..............................  ...........................        1  --------------                  
                                                                                                                
                              Sum of Fwd Products                                                               
                                                                                                                
  Fwd Standard Sheer .5330L+53.30\1\....  ...........................  .......  --------------                  
  Difference: Sum-STD...................  ...........................  .......  --------------+Excess/-         
                                                                                 Deficiency                     
  FWD Sheer: Diff8..............  ...........................  .......  --------------  Excess/         
                                                                                 Deficiency                     
----------------------------------------------------------------------------------------------------------------
\1\L in Standard Sheer=L or 500 whichever is less.                                                              


                             Sheer Summation                            
Aft Sheer+/-                                 --------------             
Fwd Sheer+/-                                 --------------             
Net Sheer+/-                                 --------------             
Mean: Net-2                                  -------------- Excess/     
                                              Deficiency                
                                                                        

    (a) In vessels having no enclosed superstructure from 0.1 L abaft 
amidships to 0.1 L forward of amidships, no decrease is allowed.
    (b) In vessels having enclosed superstructures amidships less than 
0.1 L before and abaft amidships, the decrease must be reduced by linear 
interpolation.
    (c) If excess sheer exists in the forward half, and the after half 
is at least 75 percent of standard sheer, the full decrease is allowed. 
If the after sheer is between 50 percent and 75 percent of standard 
sheer an intermediate decrease, determined by linear interpolation, is 
allowed for the excess sheer forward. If the after sheer is 50 percent 
of standard or less, no decrease is allowed for the excess sheer 
forward.
    (d) Where an enclosed poop or forecastle is of standard height with 
greater sheer than that of the freeboard deck, or is greater than 
standard height, an addition to the sheer of the freeboard deck may be 
made using the following formula:

                                S=vL'/3L

    Where s=sheer credit, to be deducted from the deficiency or added to 
the excess of sheer.
    v=difference between actual and standard height of superstructure at 
the end ordinate.
    L'=mean enclosed length of poop or forecastle up to a maximum length 
of 0.5 L.

The superstructure deck must not be less than standard height above this 
curve at any point. This curve must be used in determining the sheer 
profile for forward and after halves of the vessel.

[[Page 79]]

    (e) The maximum decreased for excess sheer must be no more than 1\1/
2\ inches per 100 feet of length.
    (f) Where the deck of an enclosed superstructure has at least the 
same sheer as the exposed freeboard deck, the sheer of the enclosed 
portion of the freeboard deck cannot be taken into account.



Sec. 45.67   Sheer measurement.

    (a) The sheer is measured from the freeboard deck at side to a line 
of reference drawn parallel to the keel through the sheer line at 
amidships;
    (b) In ships designed with a rake of keel or designed to trim by the 
stern, the sheer must be measured in reference to a line drawn through 
the sheer line at amidships parallel to the design load waterline.
    (c) In flush deck ships and in ships with detached superstructures, 
the sheer must be measured at the freeboard deck.
    (d) In ships with a step or break in the topsides, the sheer must be 
measured from the equivalent depth amidships.
    (e) In vessels with a superstructure of standard height that extends 
over the whole length of the freeboard deck, the sheer must be measured 
on the superstructure deck. Where the height of superstructure exceeds 
the standard, the least difference (Z) between the actual and standard 
heights must be added to each end ordinate. Similarly, the intermediate 
ordinates at distance of \1/6\ L and \1/3\ L from each perpendicular 
must be increased by 0.444 Z and 0.111 Z respectively.



Sec. 45.69   Correction for bow height.

    (a) The minimum summer freeboard of all manned vessels must be 
increased by the same amount in inches as any deficiency which may be 
shown by the following formulas:
    (1) For vessels having a length of not less than 79 feet and not 
greater than 550 feet,

             0.593 L (1.0-L/1640) inches--actual bow height

    (2) For vessels having a length greater than 550 feet,

               (341.6--0.227 L) inches--actual bow height

    (b) Where the bow height is obtained by sheer, the sheer must extend 
for at least 15 percent of the length of the vessel measured from the 
forward perpendicular.
    (c) Where the bow height is obtained by a superstructure, the 
superstructure must be enclosed and extend from the stem to a point at 
least 0.06 L abaft the forward perpendicular.
    (d) Vessels which, to suit exceptional operational requirements, 
cannot meet the requirements of paragraph (c) of this section may be 
given special consideration by the Commandant.
    (e) The bow height is defined as the vertical distance at the 
forward perpendicular between the waterline corresponding to the 
assigned summer freeboard at the designed trim and the top of the 
exposed deck at side.



Sec. 45.71   Midsummer freeboard.

    The minimum midsummer freeboard (fms) in inches is obtained by the 
formula:

                             fms=f(s)-0.3Ts

where
f(s)=summer freeboard in inches
Ts=distance in feet between top of keel and the summer load line.



Sec. 45.73   Winter freeboard.

    The minimum winter freeboard (fw) in inches is obtained by the 
formula:

                           fw=f(s)+Ts (200)/L

where L=length L in feet but not less than 400 feet.



Sec. 45.75   Intermediate freeboard.

    The minimum intermediate freeboard (fI) in inches is obtained 
by the formula:

                         fI=f(s)+Ts(100)/L

where L=length L in feet but not less than 400 feet.



Sec. 45.77   Salt water freeboard.

    (a) The salt water addition in inches to freeboard applicable to 
each fresh water mark is obtained by the formula:

                         Addition=/41T

where

[[Page 80]]

=displacement in fresh water, in tons of 2,240 pounds, at the 
summer load waterline.
T=tons per inch immersion, of 2,240 pounds, in fresh water at the summer 
load waterline.

    (b) When the displacement at the summer load waterline cannot be 
certified, the addition in inches to the minimum freeboard in fresh 
water may be obtained by multiplying 0.25 by the summer draught in feet 
measured from the top of the keel to the center of the load line 
diamond.



                   Subpart D--Conditions of Assignment



Sec. 45.101   Purpose.

    This subpart prescribes conditions that a vessel must meet to be 
eligible for assignment of a loadline under this part.



Sec. 45.103   Structural stress and stability.

    (a) The nature and stowage of the cargo, ballast, and other variable 
weights must be such as to make the vessel stable and avoid unacceptable 
structural stress.
    (b) The vessel must meet all applicable stability and subdivision 
requirements of this chapter.



Sec. 45.105   Information supplied to the master.

    Unless otherwise authorized by the Commandant, the vessel must have 
onboard, in a form approved by the Commandant, sufficient information.
    (a) To enable the master to load and ballast the vessel in a manner 
that avoids unacceptable stresses in the vessel's structure; and
    (b) To guide the master as to the stability of the ship under 
varying conditions of service.



Sec. 45.107   Strength of hull.

    The general structural strength of the hull must be sufficient for 
the draught corresponding to the freeboard assigned and must be approved 
by the Commandant. Ships built and maintained in conformity with the 
requirements of a classification society may be recognized by the 
Commandant as possessing adequate strength.



Sec. 45.109   Strength of superstructures and deckhouses.

    Each superstructure or deckhouse used for accommodations of the crew 
must be approved by the Commandant or the approved assigning authority 
with regard to general strength and weathertightness. The Commandant may 
use the requirements of the assigning authority as a guide.



Sec. 45.111   Strength of bulkheads at ends of superstructures.

    Bulkheads at ends of enclosed superstructures must have sufficient 
strength to withstand impact of boarding seas.



Sec. 45.113   Access openings in bulkheads at ends of enclosed superstructures.

    (a) Access openings in bulkheads at ends of enclosed superstructures 
must have doors of steel or material as strong as steel that are 
permanently attached to the bulkhead and framed, stiffened, and fitted 
so that the bulkhead and door are as strong as the bulkhead and weather 
tight when closed.
    (b) The means for securing the doors weathertight must be 
permanently attached to the doors or bulkheads and arranged so that the 
doors can be secured weathertight from both sides of the bulkhead.
    (c) Access openings in bulkheads at ends of enclosed superstructures 
must have sills that are at least 12 inches above the deck.



Sec. 45.115   Bulwarks and guardrails.

    (a) The exposed parts of freeboard and superstructures decks and 
deckhouses on the freeboard deck must have guardrails or bulwarks that 
are at least 36 inches high above the deck.
    (b) Guardrails must have at least three courses with no more than a 
9-inch opening below the lowest course and no more than 15 inches 
between other courses. If the sheer strake projection is at least 8 
inches above the deck, a guardrail may have two courses with no more 
than 15 inches between courses.
    (c) In way of trunks at least half the protection required by 
paragraph (a) of this section must be in the form of open rails.

[[Page 81]]



Sec. 45.117   Freeing port area: General.

    (a) Where bulwarks on the weather portins of freeboard or 
superstructure decks form wells, the bulwarks must have the area 
prescribed in this section and Secs. 45.119 and 45.121 for rapidly 
freeing and draining the decks of water.
    (b) Except as required in Secs. 45.119 and 45.121 the minimum 
freeing port area in square feet on each side of the ship for each well 
on the freeboard deck and on the raised quarterdeck must be at least as 
great as A in the following formulas:

    (1) Where the length of bulwark (l) in the well is 66 feet or less,

                             A=7.6+0.115 (l)

    (2) Where (l) exceeds 66 feet,

                               A=0.23 (l)

 but (l) need in no case be taken as greater than 0.7L.

    (c) In ships having erections on deck that are open at either or 
both ends, provision for freeing the space within such erections must be 
approved by the Commandant or the assigning authority.
    (d) The lower edges of the freeing ports must be as near the deck as 
practicable. Two-thirds of the freeing port area required must be 
provided in the half of the well nearest the lowest point of the sheer 
curve.
    (e) All freeing port openings in the bulwarks must be protected by 
rails or bars spaced approximately 9 inches. If shutters are fitted to 
freeing ports, ample clearance must be provided to prevent jamming. 
Hinges must have pins or bearings of noncorrodible material. If shutters 
are fitted with securing appliances, these appliances must be of 
approved construction.
    (f) The minimum freeing port area for each well on superstructure 
decks must be one-half of the area required by paragraph (b) of this 
section.



Sec. 45.119   Freeing port area: Changes from standard sheer.

    The freeing port area required by Sec. 45.117(b) must be multiplied 
by the factor in the following table 5 if the sheer differs from the 
standard sheer defined in Sec. 45.63. Table 4.

                                 Table 5                                
                  Freeing port area: Sheer correction.                  
------------------------------------------------------------------------
                                                          Multiplier for
   Ratio of sums of actual sheer ord./std. sheer ord.     area required 
                     Greater than:                           by Sec.    
                                                            45.117(b)   
------------------------------------------------------------------------
1.0....................................................           1.0   
1.0....................................................          1.00   
0.9....................................................          1.05   
0.8....................................................          1.10   
0.7....................................................          1.15   
0.6....................................................          1.20   
0.5....................................................          1.25   
0.4....................................................          1.30   
0.3....................................................          1.35   
0.2....................................................          1.40   
0.1....................................................          1.45   
No sheer...............................................          1.50   
------------------------------------------------------------------------



Sec. 45.121   Freeing port area: Changes for trunks and side coamings.

    If a vessel has a trunk and does not meet the requirements of 
Sec. 45.61 or has continuous or substantially continuous hatchway side 
coamings between detached superstructures, the minimum area of the 
freeing port openings must be obtained from the following table:

------------------------------------------------------------------------
                                                                Area of 
                                                                freeing 
                                                                ports in
                                                                relation
  Breadth of hatchway or trunk in relation to the breadth of     to the 
                             ship                                total  
                                                                area of 
                                                                  the   
                                                                bulwarks
                                                               (percent)
------------------------------------------------------------------------
40 percent or less...........................................         20
75 percent or more...........................................         10
------------------------------------------------------------------------

The area of freeing ports at intermediate breadths must be obtained by 
linear interpolation.



Sec. 45.123   Freeing port area: Changes for bulwark height.

    (a) For the purposes of freeing port area only, bulwark height is 
considered standard at 24 in for ships 240 ft in length and less; and 48 
in for ships 480 ft in length or greater. The standard bulwark height 
for ships of intermediate length is obtained by direct interpolation.
    (b) If the bulwark is more than standard height, the area required 
by Sec. 45.117 must be increased by 0.04 square feet per foot (ft2/
ft) of length of well for each foot difference in height.
    (c) For ships greater than 480 ft in length that have an average 
bulwark height less than 3 ft, the area required by Sec. 45.117 may be 
decreased by 0.04 ft2/

[[Page 82]]

ftof length for each foot difference in height.



Sec. 45.125   Crew passageways.

    The vessel must have means for protection of the crew from boarding 
seas such as life lines, gangways, and underdeck passages to facilitate 
passing between their quarters and machinery spaces and other spaces 
essential to the operation of the ship.



Sec. 45.127   Position of structures, openings, and fittings.

    For the purposes of this part--
    (a) Position 1 means in an exposed position on--
    (1) The freeboard deck or a raised quarter deck;
    (2) A superstructure deck or a trunk deck and forward of a point \1/
4\ L from the forward perpendicular; or
    (3) A trunk deck whose height is less than Hs.
    (b) Position 2 means--
    (1) On a superstructure deck aft of a point \1/4\ L abaft the 
forward perpendicular; or
    (2) On a superstructure and trunk combination, that is Hs or 
more n height, aft or a point \1/4\ L abaft the forward perpendicular.



Sec. 45.129   Hull fittings: General.

    Hull fittings must be securely mounted in the hull so as to avoid 
increases in hull stresses and must be protected from local damage 
caused by movement of equipment or cargo.



Sec. 45.131   Ventilators.

    (a) Ventilators passing through superstructures other than enclosed 
superstructures must have coamings of steel or equivalent material at 
the freeboard deck.
    (b) Ventilators in position 1 must have coamings at least 30 in. 
above the deck and ventilators in position 2 must have coamings at least 
24 in. above the deck. The Commandant or the assigning authority may 
also require coamings in other exposed positions.
    (c) Ventilators in position 1 or 2 to spaces below freeboard decks 
or decks of enclosed superstructures or trunks must have coamings of 
steel permanently connected to the deck and any ventilator coaming that 
is more than 36 in. high must be specially supported.
    (d) Except as provided in paragraph (e) of this section ventilator 
openings must have weathertight closing appliances that are permanently 
attached or, where approved by the Commandant or the assigning authority 
conveniently stowed near the ventilators to which they are to be fitted.
    (e) Ventilators in position 1, the coamings of which extend to more 
than 12.5 ft above the deck, and in position 2, the coamings of which 
extend to more than 6 ft above the deck, need not have closing 
appliances unless specifically required by the Commandant.



Sec. 45.133   Air pipes.

    (a) Where an air pipe to any tank extends above the freeboard or 
superstructure deck--
    (1) The exposed part of the air pipe must be made of steel and of 
sufficient thickness to avoid breaking from impact of boarding seas.
    (2) The air pipe must have a permanently attached means of closing 
its opening; and
    (3) The height from the deck to any point where water may obtain 
access below deck must be at least 30 in above the freeboard deck, 24 in 
above raised quarter decks, and 12 in above other superstructure decks.
    (b) If the height required in paragraph (a) of this section 
interferes with working the ship, the Commandant may approve a lower 
height after considering the closing arrangements.



Sec. 45.135   Hull openings at or below freeboard deck.

    Closures for hull openings at or below the freeboard deck must be as 
strong as the structure to which they are attached and must be 
watertight.



Sec. 45.137   Cargo ports.

    (a) Unless otherwise authorized by the Commandant, the lower edge of 
any opening for cargo, personnel, machinery access, or similar opening 
in the side of a ship must be above a line that is drawn parallel to the 
freeboard deck at side and has as its lowest point the upper edge of the 
uppermost loadline.

[[Page 83]]

    (b) The number of cargo ports in the sides of a ship must be--
    (1) No more than the minimum necessary for working the ship; and
    (2) Approved by the Commandant.



Sec. 45.139   Side scuttles.

    (a) The sill of each side scuttle must be above a line that is drawn 
parallel to the freeboard deck at side having its lowest point 2.5 
percent of the breadth or 20 in above the summer load waterline, 
whichever is higher.
    (b) Except as provided for in paragraph (c) of this section, each 
side scuttle to a space below the freeboard deck, or to a space within 
an enclosed superstructure, must have a hinged inside deadlight which is 
designed so that it can be secured watertight over the side scuttle.
    (c) A side scuttle of a superstructure end bulkhead door, 
companionway door, or deckhouse door may have a portable inside 
deadlight which is designed so that it can be:
    (1) Secured watertight over the side scuttle; and
    (2) Stowed inside the superstructure, companionway, or deckhouse 
when not in use, in a readily accessible location on or adjacent to the 
door.

[CGD 73-49R, 38 FR 12290, May 10, 1973, as amended by CCGD 80-116, 46 FR 
56788, Nov. 19, 1981]



Sec. 45.141   Manholes and flush scuttles.

    Manholes and flush scuttles in position 1 or 2 or within any 
superstructure other than an enclosed superstructure must have 
permanently attached covers, unless the cover is secured by closely 
spaced bolts around its entire perimeter.



Sec. 45.143   Hull openings above freeboard deck.

    Closures for openings above the freeboard deck must be as strong as 
the structure to which they are attached and must be weathertight.



Sec. 45.145   Hatchway covers.

    (a) Hatchways in position 1 and 2 must have weathertight hatch 
covers with gaskets and clamping devices.
    (b) The maximum ultimate strength of the hatchway cover material 
must be at least 4.25 times the maximum stress in the structure 
calculated with the following assumed loads:
    (1) For ships 350 ft or more in length, at least 250 lb/ft2 in 
position 1 and 200 lb/ft2 in position 2.
    (2) For ships less than 350 ft in length, at least AL in the 
following formula:

    (i) Position 1:

                                AL=200+C

where C=50

                               (L-79)/271

    (ii) Position 2:

                                Al=150+C

    (c) Hatchway covers must be so designed as to limit the deflection 
to not more than 0.0028 times the span under the loads described in 
paragraph (b) of this section and the thickness of mild steel plating 
forming the tops of covers must be at least 1 percent of the spacing of 
stiffeners or 0.24 in, whichever is greater.



Sec. 45.147   Hatchway coamings.

    (a) Except where the Commandant determines that the safety of the 
vessel will not be impaired in any sea condition, each hatchway must 
have a coaming that is at least--
    (1) 18 inches in position 1; and
    (2) 12 inches in position 2.
    (b) Each hatchway coaming required by this section must be made of 
steel or equivalent material.
    (c) The height of these coamings may be reduced or omitted if the 
Commandant is satisfied that safety of the ship is not thereby impaired 
in any sea conditions.



Sec. 45.149   Machinery space openings.

    (a) Machinery space openings in position 1 or 2 must be framed and 
enclosed by steel casings, and where the casings are not protected by 
other structures that meet the requirements of Sec. 45.109, their 
strength must be approved by the Commandant or the assigning authority.
    (b) Access openings in casings required by paragraph (a) of this 
section must have doors complying with the requirements of Sec. 45.113. 
Other openings in such casings shall be fitted with

[[Page 84]]

equivalent covers, permanently attached.
    (c) Except as provided in paragraph (d) of this section, coamings of 
any funnel or machinery space ventilator that must be kept open for the 
essential operations of the ship must--
    (1) In position 1, extend at least 12.5 ft above the deck; and
    (2) In position 2, extend at least 6 ft above the deck.
    (d) The Commandant may approve a lesser height for protected 
coamings.
    (e) Coamings of any fiddley or skylight over a machinery space 
opening in the freeboard or superstructure deck or the top of a 
deckhouse on the freeboard deck, must have covers of steel permanently 
attached and capable of being secured weathertight.



Sec. 45.151   Other openings.

    Each opening other than hatchways, machinery space openings, 
manholes, or flush scuttles--
    (a) In freeboard decks, must be protected by an enclosed 
superstructure or by a deckhouse or companionway that is equal in 
strength and weathertightness to an enclosed superstructure; or
    (b) In exposed superstructure decks or in the top of a deckhouse on 
freeboard decks that gives access to a space below the freeboard deck or 
a space within an enclosed superstructure, must be protected by a 
deckhouse or companionway.



Sec. 45.153   Through-hull piping: General.

    (a) All through-hull pipes required by this subpart must be made of 
steel or material equivalent to the hull in strength and fatigue 
resistance.
    (b) All valves used as shell fittings and all shell fittings on 
which such valves are mounted must be made of steel, or bronze or other 
ductile material approved by the Commandant.



Sec. 45.155   Inlets and discharge piping: Valves.

    (a) Except as provided in paragraphs (d) and (e) of this section 
each pipe that discharges overboard through the hull of the ship must 
have--
    (1) An automatic nonreturn valve with a positive means for closing; 
or
    (2) Two automatic nonreturn valves with the inboard valve accessible 
for examination in service.
    (b) The means for operating a valve described by paragraph (a)(1) of 
this section must be readily accessible and have indicators that show 
when the valve is not closed.
    (c) If the pipe discharges from a space that is not manned or does 
not have continuous bilge water monitoring, a valve described in 
paragraph (a)(1) of this section must be operable above the freeboard 
deck.
    (d) Each pipe that discharges from a space within an enclosed 
superstructure or deckhouse may have at least one accessible automatic 
nonreturn valve if the space is regularly visited by the crew.
    (e) Through-hull piping systems in machinery spaces may have valves 
with positive means for closing at the shell if the controls are readily 
accessible and have indicators showing when the valves are not closed 
(nonreturn valves are not required).



Sec. 45.157   Scuppers and gravity drains.

    Scuppers and gravity deck drains from spaces above the freeboard 
deck that penetrate the shell below a line 24'' or .05B above the summer 
loadline, whichever is greater, must have an automatic nonreturn valve. 
This valve may be omitted if the piping is of thickness not less than 
extra heavy pipe.



Sec. 45.159   Special conditions of assignment for type A vessels.

    The lower freeboards allowed for type A vessels allow water on deck 
for greater percentages of time. Therefore the following additional 
requirements must be met to qualify for type A freeboards:
    (a) Machinery casings must be protected by an enclosed 
superstructure or deckhouse unless intact bulkheads are used on all 
sides on the freeboard deck.
    (b) Exposed machinery casings may be fitted with weathertight doors 
providing they lead to a space or passageway as strong as an enclosed 
superstructure from which a second interior weathertight door is 
provided for access to the engine room.

[[Page 85]]

    (c) Hatchways on the exposed freeboard or forecastle decks must be 
provided with watertight covers of steel.
    (d) Unless a separate fore and aft access is provided below the 
freeboard deck, a permanent fore and aft gangway must be fitted at the 
superstructure deck level between poop and all other deckhouses used in 
the essential operation of the vessel.
    (e) Type ``A'' vessels must be fitted with open rails for at least 
half the length of the exposed parts of the weather deck. Where 
superstructures are connected by trunks, open rails must be fitted for 
the whole length of the exposed parts of the freeboard deck.



           Subpart E--Unmanned River Service Dry Cargo Barges

    Source: CGD 84-58, 50 FR 19533, May 9, 1985, unless otherwise noted.



Sec. 45.171  Purpose.

    This subpart prescribes conditions under which certain unmanned 
river service dry cargo barges may be exempt from the load line and 
marking requirements. In lieu of these requirements, they are subject to 
special certification and operating requirements.



Sec. 45.173  Vessels subject to this subpart.

    (a) This subpart applies to a vessel that is--
    (1) An unmanned river service dry cargo barge with a length to depth 
ratio not to exceed 22 and built to at least the minimum scantlings of 
the American Bureau of Shipping River Rules;
    (2) Operated on the Great Lakes on a voyage between Calumet Harbor, 
Chicago, Illinois and Burns Harbor, Indiana and intermediate ports on 
Lake Michigan;
    (3) Operated during fair weather condition only; and
    (4) Carrying only dry cargoes that have not been designated as 
hazardous under 46 CFR part 148 or 49 CFR subchapter C.



Sec. 45.175  Certification.

    (a) In order to be exempt from the load line and marking 
requirements of this part, the owner of a vessel must apply for 
exemption in writing to the Officer in Charge, Marine Inspection, 
Chicago, Illinois. The application may be in any form and must be signed 
by the owner or an officer authorized to represent the barge's owner. 
The mailing address is Commanding Officer, U.S. Coast Guard Marine 
Safety Office, 610 S. Canal Street, Chicago, Illinois, 60607. No form or 
certificate will be returned, however, the owner's certification will be 
kept on file at the Marine Safety Office, Chicago. The owner of a barge 
for which a load line exemption is in effect shall notify the OCMI, 
Chicago of the transfer of ownership, change of service, or other 
disposition of the barge.
    (b) The owner and operator of a vessel for which a load line 
exemption has been requested are responsible for maintaining the vessel 
and complying with the special operating requirements.
    (c) The application for exemption from the load line requirements 
must include the following general information:
    (1) Barge name.
    (2) Type.
    (3) External dimensions.
    (4) Types of Cargo.
    (5) Official Number or other classification numbers.
    (6) Owner and operator addresses and telephone numbers.
    (7) Place and date built.
    (d) The application must state and certify compliance with the 
following:
    (1) The vessel has been designed and built to at least the minimum 
scantlings of the American Bureau of Shipping River Rules which were in 
effect at the time of construction.
    (2) The provisions of 46 CFR 45.177 will be complied with before and 
during all voyages between Calumet Harbor, Chicago, Illinois and Burns 
Harbor, Indiana and intermediate ports on Lake Michigan.



Sec. 45.177  Special operation requirements.

    (a) Before commencement of any voyage on Lake Michigan, the towboat 
operator shall ensure the following:

[[Page 86]]

    (1) Deck and side shell plating must be free of visible holes, 
fractures or serious indentations as well as damage that would be 
considered in excess of normal wear and tear.
    (2) Cargo box side and end coamings must be watertight.
    (3) All manholes must remain covered and secured watertight.
    (b) During the voyage, all vessels subject to this subpart must meet 
the following minimum operating requirements in all seasons:
    (1) The vessel must be operated during fair weather conditions only.
    (2) The freeboard of the vessel must not be less than 24 inches.
    (3) The combined operating freeboard plus the height of cargo box 
coamings must be at least 54 inches.
    (4) The voyage must not be farther than 5 miles from a harbor of 
safe refuge between Calumet Harbor, Chicago Illinois and Burns Harbor, 
Indiana.
    (5) All void tanks must be kept free of excess water.

            Appendix A to Part 45--Load Line Certificate Form

                    great lakes load line certificate

No. ------
    Issued under the authority of the Commandant, U.S. Coast Guard, 
United States of America, under the provisions of the Act of August 27, 
1935, as amended to establish load lines on the Great Lakes of North 
America and the Load Line regulations in force on ----------, 19--, By 
------------------------, duly authorized by the Commandant to issue 
said load line certificate.

Ship____________________________________________________________________
Certificate No._________________________________________________________
Official No_____________________________________________________________
Length (LBP)____________________________________________________________
Gross tonnage___________________________________________________________
Port of registry________________________________________________________

                              Type of Ship:

TYPE ``A''
TYPE ``B''
TYPE ``B'' with increased freeboard

                        freeboard from deck line                        
Midsummer.....................................................        MS
Summer........................................................         S
Intermediate..................................................         I
Winter........................................................         W
                                load line                               
                                                                        
                                                                 above S
Upper edge of line through center of diamond                            
                                                                 below S
                                                                 below S
                                                                        

    Increase for salt water for all freeboards ---- inches.
    The upper edge of the deck line from which these freeboards are 
measured is ---- inches above or below the top of the -------- deck at 
side.
    This is to certify that this ship has been surveyed and the 
freeboards and load lines shown above have been found to be correctly 
marked upon the vessel in manner and location as provided by the load 
line regulations of the Commandant, U.S. Coast Guard, applicable to the 
Great Lakes.
    This certificate1 remains in force until --------------. Issued 
at ---------- on the ---- day of ----------, 19--. (Here follows the 
signature, seal, if any, and the name of the authority issuing the 
certificate.)
---------------------------------------------------------------------------

    1Upon the expiration of the certificate, renewal must be 
obtained as provided by the Great Lakes Load Line Regulations and the 
certificate so endorsed.
---------------------------------------------------------------------------

                                  notes

    (1) In accordance with the Great Lakes Load Line Regulations the 
diamond and lines must be permanently marked. The ``MS'' loadline shall 
be assigned only to those particular vessels that qualify under the 
regulations.
    (2) The ``SW'' marks need only be assigned to Great Lakes vessels 
loading in salt water of the St. Lawrence River west of a straight line 
from Cap de Rosiers to West Point Anticosti Island, and west of a line 
along longitude 63 degrees west from Anticosti Island to the north shore 
of the St. Lawrence River. In such cases these limits shall be indicated 
on the certificate.
    (3) The load line assignment given by this certificate necessarily 
assumes that the nature and stowage of cargo, ballast, etc., are such as 
to secure sufficient stability for the vessel. Accordingly, it is the 
owner's responsibility to furnish the Master of the vessel with 
stability information and instructions when this is necessary to 
maintenance of sufficient stability.
    (On the reverse side of the load line certificate, or on a separate 
sheet, attached and forming part of the certificate, provision is to be 
made for annual inspection and renewal endorsements.)



PART 46--SUBDIVISION LOAD LINES FOR PASSENGER VESSELS--Table of Contents




                  Subpart 46.01--Authority and Purpose

Sec.
46.01-1  Purpose.

[[Page 87]]

46.01-5  Authority.
46.01-15  Application of regulations.
46.01-20  Penalties for violations.

              Subpart 46.05--Definitions Used in This Part

46.05-1  Passenger vessel.
46.05-10  Foreign voyage.
46.05-15  Coastwise voyages.
46.05-20  Great Lakes voyage.
46.05-25  New passenger vessel.
46.05-30  Existing passenger vessel.

                      Subpart 46.10--Administration

46.10-1  Relaxation from regulations.
46.10-5  Load line requirements for subdivision.
46.10-10  Marks to indicate subdivision load lines.
46.10-15  Survey for the establishment and renewal of subdivision load 
          line marks.
46.10-20  Application for the assignment and renewal of subdivision load 
          lines.
46.10-25  Equivalents.
46.10-30  Subdivision load line certificates.
46.10-35  Validity of subdivision load line certificates.
46.10-40  Nonsubmergence subdivision load line (Great Lakes).
46.10-45  Nonsubmergence subdivision load lines in salt water.
46.10-50  Drills and inspections.
46.10-55  Logbook entries.
46.10-60  Control.
46.10-65  Construction.
46.10-70  Plans and inspections of new and converted vessels.

 Subpart 46.15--Subdivision Load Lines for Passenger Vessels Engaged in 
               Foreign, Coastwise, and Great Lakes Voyages

46.15-1  Procedure for determination of subdivision load line.
46.15-5  Engineering requirements.
46.15-10  Subdivision load lines.

    Authority: 46 U.S.C. 3306, 5115; E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 65-50, 30 FR 16769, Dec. 30, 1965, unless otherwise 
noted.



                  Subpart 46.01--Authority and Purpose



Sec. 46.01-1   Purpose.

    (a) The purpose of the regulations in this part is to set forth 
uniform minimum requirements applicable to passenger vessels required to 
have subdivision load lines. These requirements deal with the following:
    (1) Load line requirements applicable before a passenger vessel will 
be marked with and certificated as to subdivision load lines.
    (2) Assigning, marking, and recording of subdivision load lines.
    (3) Administration of subdivision load lines.
    (4) Application of requirements to passenger vessels.



Sec. 46.01-5   Authority.

    (a) The regulations regarding subdivision and subdivision load lines 
interpret or apply Title 46, U.S. Code, sections 86, 88a, 363, 367, 369, 
482, 483, and 1333, and Title 50, U.S. Code, section 198.
    (b) The International Convention on Load Lines, 1966 and the 
applicable International Convention for Safety of Life at Sea, also 
establish minimum requirements for load lines and subdivision.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGD 80-120, 47 FR 5723, Feb. 8, 1982]



Sec. 46.01-15   Application of regulations.

    (a) The regulations in this part establish subdivision load lines 
required on passenger vessels engaged in foreign voyages, as well as on 
passenger vessels of 150 gross tons or over engaged in coastwise or 
Great Lakes voyages.
    (b) When engaged in voyages subject to this part, no passenger 
vessel required to be marked with subdivision load lines shall depart 
from or arrive at any port or place under the jurisidiction of the 
United States, nor shall such United States vessel operate on the high 
seas nor the Great Lakes, unless such vessel has been marked with 
subdivision load lines in accordance with the regulations in this part, 
has on board a valid certificate certifying to the correctness of the 
location of such subdivision load line marks, and is otherwise in 
compliance with the applicable requirements of law and regulations in 
this part.
    (c) No passenger vessel of the United States of 150 gross tons or 
over and subject to the Coastwise Load Line Act, 1935, as amended, shall 
engage in coastwise voyages or voyages on the Great Lakes unless such 
vessel has been marked with subdivision load lines in accordance with 
the regulations in this part and has on board a

[[Page 88]]

valid certificate certifying to the correctness of the location of such 
subdivision load line marks.
    (d) No foreign passenger vessel belonging to a country that has 
ratified or acceded to the applicable International Convention for 
Safety of Life at Sea shall arrive or depart from any port or place 
under the jurisdiction of the United States, and no foreign passenger 
vessel subject to the International Load Line Act of 1973 as amended (46 
U.S.C. 86-86i) or the Coastwise Load Line Act of 1935, as amended (46 
U.S.C. 88-88i), shall arrive or depart from any port or place under the 
jurisdiction of the United States, including ports on the Great Lakes, 
unless that vessel has been marked with subdivision load lines in 
accordance with the regulations in this part and has on board a valid 
certificate certifying to the correctness of the location of such 
subdivision load line marks.
    (e) Subdivision load lines shall be marked on both sides of 
passenger vessels where determined and in a manner described in subpart 
46.15 as applicable to the vessel's service. The subdivision load line 
certificates shall be in accordance with Secs. 46.10-30 and 46.10-35.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965 as amended by CGD 80-120, 47 FR 
5723, Feb. 8, 1982]



Sec. 46.01-20   Penalties for violations.

    (a) Penalties for violations of the regulations in this part by 
passenger vessels of the United States engaged in foreign voyages shall 
be in accordance with those laws which require the inspection and 
certification of the vessel. In addition, for passenger vessels subject 
to the International Load Line Act of 1973, as amended (46 U.S.C. 86-
86i), or the Coastwise Load Line Act of 1935, as amended (46 U.S.C. 88-
88i), which engage in voyages described in Sec. 42.03-5, Sec. 42.03-10, 
or Sec. 45.01-1, the penalties for violations of the regulations in this 
part shall be those set forth in the load line act applicable to the 
vessel.
    (b) For a further description of the actions which may be taken see 
Sec. 42.07-50, of this subchapter. The procedures governing the 
assessment, collection, remission and mitigation of any monetary penalty 
imposed for a violation of a law or the regulations prescribed 
thereunder in this part, as well as the appeal procedures followed, are 
in subpart 2.50 of part 2 of subchapter A (Procedures Applicable to the 
Public) of this chapter.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGD 80-120, 47 FR 5723, Feb. 8, 1982]



              Subpart 46.05--Definitions Used in This Part



Sec. 46.05-1   Passenger vessel.

    (a) For the purpose of the regulations in this part, a vessel is a 
passenger vessel if:
    (1) Engaged on an international voyage by sea, it carries or is 
authorized to carry more than 12 passengers; or,
    (2) Engaged on a coastwise voyage by sea or a voyage on the Great 
Lakes, it carries or is authorized to carry more than 16 persons in 
addition to the crew.



Sec. 46.05-10   Foreign voyage.

    (a) A foreign voyage for the purpose of marking passenger vessels 
with subdivision load lines is a voyage by sea between a port under the 
jurisdiction of the United States and a port of a foreign country, its 
colonies, territories, or protectorates, or conversely (a voyage 
exclusively on the Great Lakes excepted).



Sec. 46.05-15   Coastwise voyages.

    (a) A coastwise voyage by sea, for the purpose of marking passenger 
vessels with subdivision load lines, is a voyage in which a vessel in 
the usual course of her employment proceeds from one port or place in 
the United States to another port or place in the United States or from 
a port or place in a possession to another port or place in the same 
possession, and passes outside the line dividing inland waters from the 
high seas (a voyage exclusively on the Great Lakes excepted), as well as 
a voyage in which a vessel proceeds from a port or place in the United 
States or her possessions and passes outside the line dividing inland 
waters from the high seas and navigates on the high seas, and then 
returns to the same port or place.

[[Page 89]]



Sec. 46.05-20   Great Lakes voyage.

    A Great Lakes voyage is any voyage from a United States port or 
place on the Great Lakes to another United States port or place on the 
Great Lakes or to a Canadian port or place on the Great Lakes, or 
conversely.



Sec. 46.05-25   New passenger vessel.

    A new passenger vessel is a vessel whose keel was laid or was a 
vessel converted into a passenger vessel on or after May 26, 1965.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968]



Sec. 46.05-30   Existing passenger vessel.

    An existing passenger vessel in respect to its voyage is any 
passenger vessel that is not a new passenger vessel as defined in 
Sec. 46.05-25.



                      Subpart 46.10--Administration



Sec. 46.10-1   Relaxation from regulations.

    (a) New passenger vessels making foreign voyages by sea shall comply 
with the requirements in this part. An existing passenger vessel engaged 
in foreign voyages by sea may be permitted relaxation from the 
requirements of this part if, in the opinion of the Commandant, U.S. 
Coast Guard, such requirements are unreasonable or impracticable.
    (b) A new passenger vessel making coastwise voyages by sea or making 
Great Lakes voyages shall comply with the requirements in this part. An 
existing passenger vessel making coastwise voyages by sea or Great Lakes 
voyages may be permitted relaxation from the requirements of this part 
if, in the opinion of the Commandant, U.S. Coast Guard, such 
requirements are unreasonable or impracticable.



Sec. 46.10-5   Load line requirements for subdivision.

    (a) The load line requirements of parts 42, 44, 45 of this 
subchapter as applicable to the passenger vessel and her service, shall 
be complied with before a passenger vessel will be marked with and 
certificated as to subdivision load lines.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968]



Sec. 46.10-10   Marks to indicate subdivision load lines.

    (a) Marks to indicate the maximum mean draft to which a passenger 
vessel may be lawfully submerged shall be permanently marked on each 
side of the passenger vessel in the form, manner, and location provided 
in this part.
    (b) The Commandant, U.S. Coast Guard, will determine the position of 
the subdivision load lines by the application of the requirements 
contained in this part and parts 170 and 171 of this chapter. The 
correct marking of subdivision load lines will be certified by the 
American Bureau of Shipping or a classification society approved by the 
Commandant for that purpose.
    (c) Certificates certifying to the correctness of subdivision load 
line marks shall not be furnished until it is determined that the marks 
have been correctly placed upon the passenger vessel.
    (d) In the case of passenger vessels that are required by the 
International Convention for Safety of Life at Sea to have on board a 
safety certificate, the certification of subdivision, load line marks 
shall be made by letter to the Commandant (G-M), U.S. Coast Guard, 
Washington, DC 20593-0001.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGD 79-023, 48 FR 51007, Nov. 4, 1983; CGD 88-070, 
53 FR 34534, Sept. 7, 1988]



Sec. 46.10-15   Survey for the establishment and renewal of subdivision load line marks.

    (a) Every passenger vessel to be marked with and certificated for 
subdivision load lines must comply with the requirements as set forth in 
subchapter H (Passenger Vessels) of this chapter for ocean, coastwise, 
and Great Lakes service as applicable to the particular vessel and the 
service in which she is to be employed.
    (b) Every passenger vessel marked with a subdivision load line shall 
be subjected to the surveys specified in

[[Page 90]]

this paragraph. The details of the surveys or inspections indicated in 
paragraphs (b)(1) through (3) of this section shall be as set forth in 
the applicable sections of part 71 of subchapter H (Passenger Vessels) 
of this chapter.
    (1) A survey before the vessel is put in service.
    (2) A periodical survey once every 12 months.
    (3) Additional surveys as occasion arises.
    (4) Surveys required by part 42, part 44, or part 45 of this 
subchapter.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968]



Sec. 46.10-20   Application for the assignment and renewal of subdivision load lines.

    (a) Application for assignment and renewal of subdivision load lines 
and certification thereof shall be made in writing to the Commandant, 
U.S. Coast Guard, Washington, D.C. 20593-0001.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGD 88-070, 53 FR 34534, Sept. 7, 1988]



Sec. 46.10-25   Equivalents.

    (a) Where in the regulations in this part it is provided that a 
particular fitting, appliance, apparatus, or type thereof, shall be 
fitted or carried in a vessel engaged on foreign voyages by sea or that 
any particular arrangement shall be adopted, there may be substituted 
any other fitting or appliance or type thereof or any other arrangement 
provided that the Commandant, U.S. Coast Guard, shall have been 
satisfied by suitable trials that the fitting, appliance, or apparatus, 
or type thereof, or that the arrangement substituted is at least as 
effective as that specified in this part.
    (b) Where, in the application of the regulations in this part to 
passenger vessels engaged in coastwise voyages by sea and on Great Lakes 
voyages, it is desired to substitute other construction, arrangement, 
fitting, or appliance, or type thereof, such substitution may be made if 
approved by the Commandant, U.S. Coast Guard, provided the degree of 
safety provided by this part is obtained.



Sec. 46.10-30   Subdivision load line certificates.

    (a) Passenger vessels engaged in foreign voyages by sea shall have 
their subdivision load lines certified on the safety certificate 
required by the International Convention for Safety of Life at Sea, 
1960. Safety certificates shall be issued by the Commandant, U.S. Coast 
Guard, for a period not to exceed one year. These vessels will also be 
provided with the load line certificate required by part 42 of this 
subchapter, the minimum freeboard shown thereon to be not less than the 
minimum freeboard corresponding to the principal passenger condition. 
The fact that they are subdivision load lines is to be noted on the load 
line certificate.
    (b) Passenger vessels engaged on coastwise voyages by sea or Great 
Lakes voyages shall have the position of their subdivision load lines 
recorded on a load line certificate in the form required by part 42 or 
part 45 of this subchapter. The fact that they are subdivision load 
lines is to be noted on the load line certificate.
    (c) A note shall be added to the load line certificate below the 
signature of the assigning--authority in the following form:

    The bulkhead deck used for determining the position of the 
subdivision load lines certified above is -------------------------- 
(here described bulkhead deck).

    (d) Annual inspections of passenger vessels shall be as required by 
Secs. 42.09-40 and 46.10-15 of this subchapter and renewal of passenger 
vessels' load line certificates shall be as required by Secs. 42.09-15 
and 42.09-20.
    (e) Each new passenger vessel which receives its first load line 
certificate shall also be provided with a copy of the load line survey 
report as required by Sec. 42.09-1(c) or Sec. 45.01-30 of this 
subchapter.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968; CGFR 68-126, 34 FR 9019, June 5, 1969; CGD 80-120, 
47 FR 5723, Feb. 8, 1982; CGD 88-070, 53 FR 34534, Sept. 7, 1988]



Sec. 46.10-35   Validity of subdivision load line certificates.

    (a) Subdivision load line certificates issued to passenger vessels 
shall only

[[Page 91]]

be valid during the time for which the certificates are issued.
    (b) If, due to any cause, the conditions as required by this part 
are changed, or the regulations in this part are not carried out, the 
load line certificate may be cancelled and the load lines considered 
nonexistent: Provided, That if the conditions causing the cancellation 
of the certificate are satisfactorily corrected, the load line 
certificate shall be reinstated for the remainder of its term.
    (c) A valid subdivision load line certificate for foreign voyages by 
sea shall be valid for coastwise voyages by sea and Great Lakes voyages. 
A valid subdivision load line certificate for coastwise voyages by sea 
shall be valid for Great Lakes voyages but not for foreign voyages by 
sea. A valid subdivision load line certificate for Great Lakes voyages 
shall not be valid for foreign or coastwise voyages by sea.



Sec. 46.10-40   Nonsubmergence subdivision load line (Great Lakes).

    (a) Passenger vessels on the Great Lakes of 150 gross tons or over 
shall not submerge the subdivision load line applicable to the voyage.



Sec. 46.10-45   Nonsubmergence subdivision load lines in salt water.

    (a) Passenger vessels required to be marked with subdivision load 
lines, engaged on foreign and coastwise voyages other than the Great 
Lakes voyages, shall not submerge in salt water the subdivision load 
line applicable to the voyage. Passenger vessels engaged on ocean, 
foreign or coastwise voyages may be marked with fresh water load lines. 
A passenger vessel on foreign or coastwise voyages (except Great Lakes 
voyages) may have an allowance made for the degree of brackishness of 
the water in which the vessel is floating but not for the weight of 
fuel, water, etc., required for consumption between the point of 
departure and the open sea, and no allowance is to be made for bilge or 
ballast water that may be in the passenger vessel at the time of 
departure.



Sec. 46.10-50   Drills and inspections.

    (a) For the required drills and inspections to be conducted on 
passenger vessels, see subpart 78.17 of subchapter H (Passenger Vessels) 
of this chapter.



Sec. 46.10-55   Logbook entries.

    (a) For required logbook entries to be made on passenger vessels, 
see subpart 78.17 of subchapter H (Passenger Vessels) of this chapter.



Sec. 46.10-60   Control.

    (a) The District Director of Customs or the Coast Guard District 
Commander may detain a passenger vessel for a survey if there is reason 
to believe that such a vessel is proceeding on her journey in excess of 
the draft allowed by the regulations in this part as indicated by the 
vessel's load lines certified on the safety certificate, load line 
certificate, or otherwise. The Coast Guard District Commander may detain 
a passenger vessel if it is so loaded as to be manifestly unsafe to 
proceed to sea. Except as otherwise required by this section, 
Sec. 42.07-60 if this subchapter applies to all passenger vessels 
assigned load lines under the load line acts and the regulations of this 
subchapter.

[CGFR 68-126, 34 FR 9019, June 5, 1969]



Sec. 46.10-65   Construction.

    (a) The watertight subdivision of every passenger vessel must be as 
efficient as possible, having regard to its intended service. This 
principle is given effect by applying the requirements in part 171 of 
this chapter.
    (b) Passenger vessels engaged in foreign voyages by sea or coastwise 
voyages by sea or voyages on the Great Lakes, to be marked with 
subdivision load lines shall comply with the requirements in this part.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGD 79-023, 48 FR 
51007, Nov. 4, 1983]



Sec. 46.10-70   Plans and inspections of new and converted vessels.

    (a) Plans for a new passenger vessel or a vessel to be converted to 
a passenger vessel shall be submitted to the Commandant as required by 
subpart 71.65 of subchapter H (Passenger Vessels) of this chapter.
    (b) Inspections shall be made during the construction or conversion 
of the

[[Page 92]]

vessel as required by subpart 71.20 of subchapter H (Passenger Vessels) 
of this chapter.
    (c) Upon completion of construction or conversion of a passenger 
vessel, a stability test must be performed and stability information 
must be supplied to the operator as required by part 170 of this 
chapter.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGD 79-023, 48 FR 
51007, Nov. 4, 1983]



 Subpart 46.15--Subdivision Load Lines for Passenger Vessels Engaged in 
               Foreign, Coastwise, and Great Lakes Voyages



Sec. 46.15-1   Procedure for determination of subdivision load line.

    The procedure for determining the subdivision load line as well as 
special construction features of the vessel must be as set forth in 
subpart 72.01 and parts 170 and 171 of this chapter.

[CGD 79-023, 48 FR 51007, Nov. 4, 1983]



Sec. 46.15-5   Engineering requirements.

    (a) Bilge and ballast systems, piping, inlets and discharges, ash 
chutes, astern power, and auxiliary steering shall be in accordance with 
the provisions of subchapter F (Marine Engineering) of this chapter.



Sec. 46.15-10   Subdivision load lines.

    (a) Subdivision load lines shall be located by measuring vertically 
down from the deck line required by part 42 of this subchapter.
    (b) The length, width, and manner of marking the lines shall be as 
provided in subpart 42.13 of this subchapter.
    (c) No subdivision load line is to be placed so that the freeboard 
is reduced from that determined by the highest seasonal mark permitted 
by part 42.
    (d) When the highest subdivision load line is located on a vessel 
used as a passenger vessel in a position between the highest and lowest 
seasonal load line marks, the seasonal load line marks above the 
subdivision load line will be omitted and those below will be marked.
    (e) When the freeboard from the highest subdivision load line on a 
vessel used as a passenger vessel is greater than the freeboard from the 
lowest load line permitted by part 42 of this subchapter, the load lines 
required by part 42 of this subchapter shall be omitted and the disk 
with its horizontal line located in line with the highest subdivision 
load line.
    (f) One fresh water line shall be marked. When a subdivision and a 
normal load line are combined, the normal fresh water line only shall be 
used unless the position of the subdivision load line is such that 
confusion will result, in which case a subdivision fresh water line may 
be used, marked FC1 and the normal fresh water line omitted.
    (g) Subdivision load lines shall be aft of the vertical line. The 
vertical line shall be extended as necessary to connect the lowest and 
highest load lines marked on the vessel.
    (h) When a vessel has spaces used for cargo and passengers 
alternatively so that the position of the subdivision load line varies 
with the service, subdivision load lines for the principal passenger 
condition shall be marked and denoted by C1 and the alternative 
conditions marked and denoted by C2, C3, etc. The position of 
each load line and the conditions under which a particular load line is 
applicable shall be noted in the certificate.
    (i) The principal passenger condition for a vessel having spaces 
used for passengers and cargo alternatively is the condition where only 
those spaces appropriated exclusively to passengers are taken into 
consideration for determination of the subdivision load line.
    (j) For Great Lakes vessels, references to part 42 shall read part 
45 and a ``diamond'' shall be substituted for the ``disk''. No ``fresh 
water'' line will be marked.

[CGFR 65-50, 30 FR 16769, Dec. 30, 1965, as amended by CGFR 68-60, 33 FR 
10077, July 12, 1968]



PART 47--COMBINATION LOAD LINES--Table of Contents




                           Subpart A--General

47.100  Purpose.
47.110  Definitions used in this part.

[[Page 93]]

                        Subparts B--E [Reserved]

Subpart F--International and Great Lakes Service; Stability Limited Deck 
                              Cargo Barges

47.600  Description of service.
47.610  Conditions of assignment.
47.620  Load line marks.
47.630  Restrictions.
47.640  Form of certificate.

                          Subpart G--[Reserved]

    Authority: 46 U.S.C. 5115; 49 CFR 1.46.

    Source: CGD 86-016, 51 FR 9962, Mar. 24, 1986, unless otherwise 
noted.



                           Subpart A--General



Sec. 47.100  Purpose.

    (a) The purpose of the regulations in this part is to set forth 
simplified alternative marking schemes for those vessels operating in 
more than one service. Operating requirements for a given vessel could 
vary depending on the service, the season of the year, stability 
requirements, manning requirements and tonnage requirements. The 
conditions of assignment, restrictions applicable, form of the 
certificate and the load line marks are described.



Sec. 47.110  Definitions used in this part.

    (a) International service means:
    (1) A voyage by sea between a port under the jurisdiction of the 
United States and a port of a foreign country, its colonies, 
territories, or protectorates, or conversely (a voyage exclusively on 
the Great Lakes is excepted); or
    (2) A voyage that proceeds beyond 20 nautical miles from the 
territorial sea baseline.
    (b) Great Lakes service means a voyage from a United States port or 
place on the Great Lakes to another United States port or place on the 
Great Lakes or to a Canadian port or place on the Great Lakes, or 
conversely. In concurrence with related Canadian regulations, the waters 
of the St. Lawrence River west of a rhumb line drawn from Cap de Rosiers 
to West Point, Anticosti Island, and west of a line along 63 deg. W. 
Longitude from Anticosti Island to the north shore of the St. Lawrence 
River shall be considered as part of the Great Lakes. In addition, the 
Victoria Bridge, Montreal, Canada, is the dividing line between fresh 
water and salt water in the St. Lawrence River.



                        Subparts B--E [Reserved]



Subpart F--International and Great Lakes Service; Stability Limited Deck 
                              Cargo Barges



Sec. 47.600  Description of service.

    This subpart applies to deck cargo barges operating in International 
and Great Lakes service and meeting the conditions of assignment in 
Sec. 47.610 of this subpart.



Sec. 47.610  Conditions of assignment.

    Owners or operators of deck cargo barges which are draft limited by 
the intact stability requirements of 46 CFR 174.015 (a)(1) and (a)(2) 
may elect to be assigned load lines under this subpart in order to load 
to a draft corresponding to the intact stability requirement of 10 foot-
degrees (46 CFR 174.015(a)(2)) while engaging in Great Lakes service 
during the summer season.



Sec. 47.620  Load line marks.

    (a) A plimsoll mark (disc and line through center) applicable to 
International service must be placed at the draft corresponding to 15-
degrees of righting energy as calculated in fulfilling the requirements 
of 46 CFR 174.015(a)(1).
    (b) The seasonal ladder representing summer, winter, and winter 
North Atlantic seasons must be as shown in Figure 1 below.
    (c) An equivalent Great Lakes summer seasonal line must be placed on 
the seasonal ladder at the draft corresponding to 10 foot-degrees of 
righting energy as calculated in fulfilling the requirements of 46 CFR 
174.015(a)(2) and be marked with a (T).
    (d) The fresh water mark may be omitted by request of the owner or 
operator.



Sec. 47.630  Restrictions.

    (a) The mark (T) applies only to Great Lakes service from May 1 
through September 30.

[[Page 94]]

    (b) Notations are to be placed on the face of the load line 
certificate to the effect that:
    (1) The barge must be operated in compliance with the draft vs. 
cargo vertical center of gravity tables in the U.S. Coast Guard approved 
stability letter, and
    (2) The mark (T) is applicable only for Great Lakes service from May 
1 through September 30 as per 46 CFR 45.9



Sec. 47.640  Form of certificate.

    The form of the certificate is as specified in Sec. 42.50-5(b) of 
this subchapter with the exception that the illustrated load line marks 
are as shown in Figure 1 below.

[[Page 95]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.017





                          Subpart G--[Reserved]

[[Page 96]]



                    SUBCHAPTER F--MARINE ENGINEERING





PART 50--GENERAL PROVISIONS--Table of Contents




             Subpart 50.01--Basis and Purpose of Regulations

Sec.
50.01-5  Assignment of functions.
50.01-10  Purpose of regulations.
50.01-15  Scope of regulations.
50.01-20  OMB control numbers assigned pursuant to the Paperwork 
          Reduction Act.

                       Subpart 50.05--Application

50.05-1  General.
50.05-5  Existing boilers, pressure vessels or piping systems.
50.05-10  Alterations or repairs.
50.05-15  Vessels subject to regulations in this subchapter.
50.05-20  Steam-propelled motorboats.

       Subpart 50.10--Definition of Terms Used in This Subchapter

50.10-1  Commandant.
50.10-5  Coast Guard District Commander or District Commander.
50.10-10  Officer in Charge, Marine Inspection, (OCMI).
50.10-15  Marine inspector or inspector.
50.10-20  Headquarters.
50.10-23  Marine Safety Center.
50.10-25  Coast Guard Symbol.
50.10-30  Coast Guard number.
50.10-35  Constructed.

               Subpart 50.20--Plan Submittal and Approval

50.20-1  General.
50.20-5  Procedures for submittal of plans.
50.20-10  Number of copies of plans required.
50.20-15  Previously approved plans.
50.20-25  Calculations.
50.20-30  Alternative materials or methods of construction.
50.20-33  Correspondence regarding approved plans.
50.20-35  Marine inspector's decisions.
50.20-40  Right of appeal.

       Subpart 50.25--Acceptance of Material and Piping Components

50.25-1  General.
50.25-3  Manufacturer or mill certification.
50.25-5  Products requiring manufacturer or mill certification.
50.25-7  Testing of products required to be certified in presence of 
          marine inspector.
50.25-10  Acceptance of piping components by specific letter or approved 
          plan.

                  Subpart 50.30--Fabrication Inspection

50.30-1  Scope.
50.30-10  Class I, I-L and II-L pressure vessels.
50.30-15  Class II pressure vessels.
50.30-20  Class III pressure vessels.

    Authority: 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 
58801, 3 CFR, 1980 Comp., p. 277; 49 CFR 1.45, 1.46; Section 50.01-20 
also issued under the authority of 44 U.S.C. 3507.

    Source: CGFR 68-82, 33 FR 18808, Dec. 18, 1968, unless otherwise 
noted.



             Subpart 50.01--Basis and Purpose of Regulations



Sec. 50.01-5   Assignment of functions.

    (a) The Department of Transportation Act (Pub. L. 89-670, 80 Stat. 
931-950, 49 U.S.C. 1651-1659), transferred to and vested in the 
Secretary of Transportation ``* * * all functions, powers, and duties, 
relating to the Coast Guard of the Secretary of the Treasury and of 
other officers and offices of the Department of the Treasury'' 
(subsection 6(b)(1), 49 U.S.C. 1655(b)). This transfer is subject to 
certain conditions, modifications, and exceptions as set forth in such 
act. By a rule in 49 CFR 1.4(a) the Secretary of Transportation 
delegated to the Commandant, U.S. Coast Guard, authority to exercise 
certain functions, powers, and duties as set forth in subsections 
6(a)(4), 6(b)(1), and 6(g) of such act (49 U.S.C. 1655), subject to 
conditions, exceptions and modifications as described in 49 CFR part 1. 
By a rule in 49 CFR 1.9 the Secretary of Transportation continued in 
effect actions taken prior to April 1, 1967.
    (b) The Commandant, U.S. Coast Guard, in a notice dated March 31, 
1967, and effective April 1, 1967 (32 FR 5611), approved the 
continuation of orders, rules, regulations, policies, procedures, 
privileges, waivers, and other actions, which had been made, allowed, 
granted, or issued prior to April 1, 1967, and provided that they shall 
continue in effect according to their terms until modified, terminated, 
repealed, superseded, or set aside by appropriate authority.

[[Page 97]]



Sec. 50.01-10   Purpose of regulations.

    (a) The purpose of the regulations in this subchapter is to set 
forth minimum requirements for marine engineering details for various 
types of vessels in accordance with the intent of title 52 of the 
Revised Statutes and acts amendatory thereof or supplemental thereto as 
well as to implement various international conventions for safety of 
life at sea and other treaties, which contain requirements affecting 
marine engineering. The regulations in this subchapter have the force of 
law.
    (b) All marine engineering details, such as boilers, pressure 
vessels, main and auxiliary machinery, piping, valves, and fittings, 
shall be designed, constructed, and installed in accordance with the 
provisions of this subchapter, except when specifically modified by the 
regulations in another subchapter in this chapter for a particular type 
of vessel or where a specific installation may be required or permitted.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, CGD 95-012, 60 FR 48049, Sept. 
18, 1995]



Sec. 50.01-15   Scope of regulations.

    (a) This subchapter provides the specifications, standards and 
requirements for strength and adequacy of design, construction, 
installation, inspection, and choice of materials for machinery, 
boilers, pressure vessels, safety valves, and piping systems upon which 
safety of life is dependent.
    (b) Since this subchapter contains the marine engineering details, 
it implements the requirements for inspection and certification of 
vessels as set forth in other subchapters for specific types of vessels.



Sec. 50.01-20   OMB control numbers assigned pursuant to the Paperwork Reduction Act.

    (a) Purpose. This section collects and displays the control numbers 
assigned to information collection and recordkeeping requirements in 
this subchapter by the Office of Management and Budget (OMB) pursuant to 
the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.). The Coast 
Guard intends that this section comply with the requirements of 44 
U.S.C. 3507(f) which requires that agencies display a current control 
number assigned by the Director of the OMB for each approved agency 
information collection requirement.
    (b) Display.

------------------------------------------------------------------------
                                                            Current OMB 
  46 CFR Part or Section where Identified or Described      Control No. 
------------------------------------------------------------------------
                                                                        
Parts 50 through 64.....................................       2115-0142
------------------------------------------------------------------------

[49 FR 38120, Sept. 27, 1984, as amended by CGD 88-072, 53 FR 34297, 
Sept. 6, 1988]



                       Subpart 50.05--Application



Sec. 50.05-1   General.

    (a) The regulations in this subchapter shall apply to the marine 
engineering details of installations on vessels required to be inspected 
and certificated under other subchapters in this chapter as described in 
Sec. 50.01-1.
    (b) The regulations in this subchapter are not retroactive in 
effect, except as provided in Sec. 50.05-5 or Sec. 50.05-10, or if 
specifically so provided for at the time specific regulations are 
amended or added.
    (c) The requirements in this subchapter revised or added subsequent 
to July 1, 1969, shall be applicable to the installations contracted for 
after the effective dates of such requirements. Normally, materials, 
items of equipment, or installations in vessels which have been accepted 
and passed as satisfactory and meeting the applicable requirements in 
this subchapter then in effect and which are maintained in good and 
serviceable condition to the satisfaction of the Officer in Charge, 
Marine Inspection, may be continued in use until replacement is deemed 
necessary by such officer or as specified in the regulations.
    (d) Items of equipment, which are in use on vessels, previously 
approved by the Commandant but not complying with the latest 
specification requirements may be continued in use so long as they are 
maintained in good and serviceable condition to the satisfaction of the 
Officer in Charge, Marine Inspection, until replacement is deemed 
necessary by such officer or as specified in the regulations.
    (e) Industrial systems and components on mobile offshore drilling 
units

[[Page 98]]

must meet subpart 58.60 of this chapter.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56799, Dec. 4, 1978; CGD 77-147, 47 FR 21809, May 20, 1982]



Sec. 50.05-5   Existing boilers, pressure vessels or piping systems.

    (a) Whenever doubt exists as to the safety of an existing boiler, 
pressure vessel, or piping system, the marine inspector may require that 
it be gaged or checked to determine the extent of deterioration, and if 
necessary for safety may require the recalculation and reduction of the 
maximum allowable working pressure.
    (b) For the purpose of recalculating the maximum allowable working 
pressure of boilers, pressure vessels, or piping which have deteriorated 
in service, the applicable design formulas in effect at the time it was 
contracted for or built or the currently effective design formulas in 
this subchapter shall be used: Provided, That such recalculation based 
on currently effective design formulas in this subchapter does not 
permit a higher pressure than that originally allowed by the regulations 
in effect at the time such work was contracted for or built.
    (c) When existing vessels are reboilered, the mountings and 
attachments shall be renewed in accordance with the regulations in this 
subchapter in effect at the time such reboilering work is contracted 
for. The existing steam piping shall be examined. Those portions which 
are in good condition and comply with minimum thickness requirements in 
effect at the time such reboilering work is contracted for may be 
continued in service. The steam piping replaced shall be in accordance 
with the regulations in this subchapter in effect for new construction.
    (d) For the purpose of this section, existing equipment includes 
only items which have previously met all Coast Guard requirements for 
installation aboard a vessel certificated by the Coast Guard, including 
requirements for design, fabrication, testing, and inspection at the 
time the equipment was new.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9430, Mar. 8, 1985]



Sec. 50.05-10   Alterations or repairs.

    (a) When alteration or repair of boilers, pressure vessels, 
machinery, safety valves or piping systems becomes necessary, the work 
shall be done under the cognizance of the Officer in Charge Marine 
Inspection. It shall be done in accordance with the regulations in 
effect at the time such vessel or installation was contracted for or 
built (whichever is latest), or in accordance with the regulations in 
effect for new construction.
    (b) When alterations or repairs are made to a U.S. flag vessel in a 
port or place not in the United States, a notice containing details of 
the proposed alterations or repairs must be submitted to the appropriate 
Officer in Charge, Marine Inspection.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56799, Dec. 4, 1978]



Sec. 50.05-15  Vessels subject to regulations in this subchapter.

    (a) Passenger vessels, tank vessels, cargo and miscellaneous 
vessels, nautical schoolships, mobile offshore drilling units, and 
oceanographic vessels are subject to the regulations in this subchapter 
to the extent prescribed by various laws and regulations as described in 
Sec. 50.01-1. The applicable provisions in this subchapter shall apply 
to all such U.S. flag vessels, and to all such foreign vessels which 
carry passengers from any port in the United States except as follows:
    (1) Any vessel of a foreign nation signatory to the International 
Convention for Safety of Life at Sea, 1974, and which has on board a 
current, valid Convention certificate attesting to the sufficiency of 
the marine engineering details as prescribed by applicable regulations 
in this chapter.
    (2) Any vessel of a foreign nation having inspection laws 
approximating those of the United States together with reciprocal 
inspection arrangements with the United States, and which has on board a 
current, valid certificate of inspection issued by its government under 
such arrangements.
    (3) Any vessel operating exclusively on inland waters which are not 
navigable waters of the United States.

[[Page 99]]

    (4) Any vessel laid up and dismantled and out of commission.
    (5) With the exception of vessels of the U.S. Maritime 
Administration, any vessel with the title vested in the United States 
and which is used for public purposes.
    (b) Notwithstanding the exceptions previously noted in paragraphs 
(a) (1) and (2) of this section, foreign vessels of novel design or 
construction or whose operation involves potential unusual risks shall 
be subject to inspection to the extent necessary to safeguard life and 
property in U.S. ports, as further provided by Sec. 2.01-13 in 
subchapter A (Procedures Applicable to the Public) of this chapter.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56799, Dec. 4, 1978; CGD 80-161, 48 FR 15472, Apr. 11, l983; CGD 90-008, 
55 FR 30660, July 26, 1990; CGD 95-012, 60 FR 48049, Sept. 18, 1995]



Sec. 50.05-20   Steam-propelled motorboats.

    (a) The requirements covering design of the propelling engine, 
boiler, and the auxiliary machinery, and the inspection thereof on all 
motor boats which are more than 40 feet in length and which are 
propelled by machinery driven by steam shall be in accordance with the 
applicable provisions of this subchapter.
    (b) If the engines, boilers, and auxiliary machinery are found to be 
in safe operating condition at the initial or subsequent periodical 
inspection, the Officer in Charge, Marine Inspection, shall issue a 
letter to that effect. Such letter shall be posted on the vessel under 
glass. The letter will be valid for a specified period of time, as 
determined by the Officer in Charge, Marine Inspection. The owner, 
within 30 days prior to its expiration, shall make application to the 
nearest Officer in Charge, Marine Inspection for a renewal thereof.



       Subpart 50.10--Definition of Terms Used in This Subchapter



Sec. 50.10-1   Commandant.

    The term Commandant means the Commandant U.S. Coast Guard.



Sec. 50.10-5   Coast Guard District Commander or District Commander.

    The term Coast Guard District Commander or District Commander means 
an officer of the Coast Guard designated as such by the Commandant to 
command all Coast Guard activities within his district, which include 
the inspections, enforcement, and administration of title 52, Revised 
Statutes, and acts amendatory thereof or supplemental thereto, and rules 
and regulations thereunder.



Sec. 50.10-10   Officer in Charge, Marine Inspection, (OCMI).

    The term Officer in Charge, Marine Inspection, (OCMI) means any 
person from the civilian or military branch of the Coast Guard 
designated as such by the Commandant and who, under the superintendence 
and direction of the Coast Guard District Commander, is in charge of an 
inspection zone for the performance of duties with respect to the 
inspections, enforcement, and administration of title 52, Revised 
Statutes, and acts amendatory thereof or supplemental thereto, and rules 
and regulations thereunder.



Sec. 50.10-15   Marine inspector or inspector.

    The term marine inspector or inspector means any person from the 
civilian or military branch of the Coast Guard assigned under the 
superintendence and direction of an Officer in Charge, Marine 
Inspection, or any other person as may be designated for the performance 
of duties with respect to the inspections, enforcement and the 
administration of title 52, Revised Statutes, and acts amendatory 
thereof or supplemental thereto, and rules and regulations thereunder.



Sec. 50.10-20   Headquarters.

    The term Headquarters means the Office of the Commandant, U.S. Coast 
Guard, Washington, D.C. 20593-0001.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 88-070, 53 FR 
34534, Sept. 7, 1988]



Sec. 50.10-23  Marine Safety Center.

    The term Marine Safety Center refers to the Commanding Officer, U.S. 
Coast

[[Page 100]]

Guard, Marine Safety Center, 400 7th St., SW., Washington, DC 20590.

[CGD 77-140, 54 FR 40597, Oct. 2, 1989]



Sec. 50.10-25   Coast Guard Symbol.

    (a) The term Coast Guard Symbol means that impression stamped on the 
nameplates of boilers, pressure vessels, and safety valves by a marine 
inspector upon the satisfactory completion of the tests and inspection 
of the product. It may also be used by a marine inspector to identify 
workmanship test plates and welding samples.
    (b) The impression of the Coast Guard Symbol for stamping nameplates 
and specimens is shown in Figure 50.10-25(b).
[GRAPHIC] [TIFF OMITTED] TC01FE91.018

                 Figure 50.10-25(b)--Coast Guard Symbol.



Sec. 50.10-30   Coast Guard number.

    (a) The Coast Guard number means that number assigned to boilers and 
pressure vessels by the Officer in Charge, Marine Inspection, who makes 
the final tests and inspections.
    (b) The Coast Guard number shall be stamped on the nameplates of 
boilers and pressure vessels.
    (c) The Coast Guard number is comprised of the following:
    (1) Three capital letters which identify the office of the issuing 
Officer in Charge, Marine Inspection (see Table 50.10-30); followed by,
    (2) An OCMI serial number, by which the particular boiler or 
pressure vessel can be identified; the first two digits of which will 
identify the calendar year the number was assigned.

Table 50.10-30--Marine Inspection Office Identification Letters in Coast
             Guard Numbers for Boilers and Pressure Vessels             
------------------------------------------------------------------------
              Identification                  Marine Inspection Office  
------------------------------------------------------------------------
ALB.......................................  Albany.                     
ANC.......................................  Anchorage.                  
BAL.......................................  Baltimore.                  
BOS.......................................  Boston.                     
BUF.......................................  Buffalo.                    
CHA.......................................  Charleston.                 
CHI.......................................  Chicago.                    
CIN.......................................  Cincinnati.                 
CLE.......................................  Cleveland.                  
COR.......................................  Corpus Christi.             
DET.......................................  Detroit.                    
DUL.......................................  Duluth.                     
GAL.......................................  Galveston.                  
GUA.......................................  Guam.                       
HON.......................................  Honolulu.                   
HOU.......................................  Houston.                    
HRV.......................................  Hampton Roads, Va.          
HUN.......................................  Huntington.                 
JAC.......................................  Jacksonville.               
JUN.......................................  Juneau.                     
LOS.......................................  Los Angeles.                
LOU.......................................  Louisville.                 
MEM.......................................  Memphis.                    
MIA.......................................  Miami.                      
MIL.......................................  Milwaukee.                  
MIN.......................................  Minneapolis.                
MOB.......................................  Mobile.                     
NAS.......................................  Nashville.                  
NEW.......................................  New Orleans.                
NYC.......................................  New York.                   
PAD.......................................  Paducah.                    
PAT.......................................  Port Arthur.                
PHI.......................................  Philadelphia.               
PIT.......................................  Pittsburgh.                 
POM.......................................  Portland, Maine.            
POR.......................................  Portland, Oreg.             
PRO.......................................  Providence.                 
ROT.......................................  Rotterdam.                  
SAV.......................................  Savannah.                   
SDC.......................................  San Diego.                  
SEA.......................................  Seattle.                    
SFC.......................................  San Francisco.              
SIM.......................................  Saint Ignace.               
SJP.......................................  San Juan.                   
SLM.......................................  St. Louis.                  
STB.......................................  Sturgeon Bay.               
TAM.......................................  Tampa.                      
TOL.......................................  Toledo.                     
VAL.......................................  Valdez.                     
WNC.......................................  Wilmington, N.C.            
------------------------------------------------------------------------

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9975, June 17, 1970; CGD 74-219, 39 FR 40158, Nov. 14, 1974; CGD 78-
161, 44 FR 13492, Mar. 12, 1979]



Sec. 50.10-35  Constructed.

    The term constructed means the keel has been laid or, for vessels 
with no keel, assembly of at least 50 tons or 1% of the estimated mass 
of all structural material, whichever is less, has been completed.

[CGD 83-043, 60 FR 24772, May 10, 1995]

[[Page 101]]



               Subpart 50.20--Plan Submittal and Approval



Sec. 50.20-1   General.

    (a) The required vessel, equipment, or installation plans, as listed 
in this subchapter, are general in character, but include all plans 
which normally show the intended construction and safety features coming 
under the cognizance of the Coast Guard. In a particular case, however, 
not all of the plans enumerated may be applicable, and in such cases the 
Coast Guard will so notify the submitter.
    (b) Manufacturers of pressure vessels and other components, which 
require specific fabrication inspection in accordance with the 
requirements of this subchapter, shall submit and obtain approval of the 
applicable construction plans prior to the commencement of such 
fabrication. Manufacturers of automatically controlled boilers shall 
submit and obtain approval of the applicable control system plans prior 
to installation of the boiler. Manufacturers of boilers which must meet 
the requirements of part 52 of this subchapter shall submit the 
applicable construction plans for review prior to installation.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9431, Mar. 8, 1985]



Sec. 50.20-5  Procedures for submittal of plans.

    (a) As the relative locations of shipyards, design offices, and 
Coast Guard offices vary throughout the country, no specific routing 
will be required in the submittal of plans. In general, one of the 
procedures outlined in this section apply, but if a more expeditious 
procedure can be used, there will normally be no objection to it.
    (b) The plans may be submitted in duplicate to the Officer in 
Charge, Marine Inspection, at or nearest the place where the vessel is 
to be built. Alternatively, the plans may be submitted in triplicate to 
the Marine Safety Center.
    (c) In the case of classed vessels, upon specific request by the 
submitter, the American Bureau of Shipping will arrange to forward the 
necessary plans to the Coast Guard indicating its action thereon. In 
this case, the plans will be returned directly to the submitter as noted 
in paragraph (c) of this section.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 88-070, 53 FR 
34534, Sept. 7, 1988; CGD 77-140, 54 FR 40598, Oct. 2, 1989; CGD 95-012, 
60 FR 48049, Sept. 18, 1995; CGD 95-072, 60 FR 50462, Sept. 29, 1995]



Sec. 50.20-10   Number of copies of plans required.

    (a) Three copies of each plan are normally required so that one copy 
can be returned to the submitter. If the submitter desires additional 
copies of approved plans, a suitable number should be submitted to 
permit the required distribution.



Sec. 50.20-15  Previously approved plans.

    (a) A manufacturer wishing to fabricate equipment in accordance with 
a plan previously approved (including work accomplished under a 
different contract) shall not be required to resubmit such plans 
provided:
    (1) Certification is submitted that the proposed equipment conforms 
in every respect to the plan previously approved, and such certification 
contains the drawing number, title, date, and last revision or change 
date, and date of previous approval;
    (2) The current regulations, including adopted specifications, 
standards or codes, pertaining to the proposed equipment are the same as 
those current when the original plan was approved; and
    (3) A copy of the approved plan is available for review by the 
approving office.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40598, Oct. 2, 1989]



Sec. 50.20-25   Calculations.

    (a) Calculations shall be forwarded with plans submitted for 
approval and shall clearly substantiate compliance with the regulations 
in this subchapter. Care shall be taken to identify sources of 
equations, factors and other information upon which the calculations are 
based.
    (b) The results of the calculations, such as the maximum allowable 
working pressure (MAWP), test pressure,

[[Page 102]]

and safety device settings, shall be clearly identified.



Sec. 50.20-30   Alternative materials or methods of construction.

    (a) When new or alternative procedures, designs, or methods of 
construction are submitted for approval and for which no regulations 
have been provided, the Commandant will act regarding the approval or 
disapproval thereof.
    (b) If, in the development of industrial arts, improved materials or 
methods of construction are developed, their use in lieu of those 
specified will be given consideration upon formal application to the 
Commandant, with full information as to their characteristics, together 
with such scientific data and evidence as may be necessary to establish 
the suitability of such materials or methods of construction for the 
purpose intended.



Sec. 50.20-33   Correspondence regarding approved plans.

    (a) The Coast Guard maintains records concerning plans, 
calculations, etc., of equipment approved in accordance with the 
regulations in this subchapter for 5 years. After 5 years from the date 
of original approval of a drawing, plan or calculation and related 
correspondence, any submittal or correspondence which refers to such 
documents shall be accompanied by copies of the documents, including 
pertinent correspondence.



Sec. 50.20-35   Marine inspector's decisions.

    (a) When it becomes necessary for a marine inspector to make 
decisions on matters covered by the regulations in this subchapter or by 
requirements in referenced specifications, standards or codes, the 
inspector shall inform the owner or his representative of the 
requirement, which will be identified by source, section and paragraph 
number, on which the decisions are based. Whenever it is necessary to 
make decisions in matters not specifically covered by the regulations in 
this subchapter or by referenced requirements, the marine inspector 
shall clearly state the reasons which caused him to arrive at such 
decisions.
    (b) If the owner or his representative disagrees with a decision 
made by the marine inspector, he shall take up the matter with the local 
Officer in Charge, Marine Inspection. The owner or his representative 
may appeal the decision of the Officer in Charge, Marine Inspection, in 
accordance with Sec. 50.20-40.



Sec. 50.20-40  Right of appeal.

    Any person directly affected by a decision or action taken under 
this subchapter, by or on behalf of the Coast Guard, may appeal 
therefrom in accordance with subpart 1.03 of this chapter.

[CGD 88-033, 54 FR 50380, Dec. 6, 1989]



       Subpart 50.25--Acceptance of Material and Piping Components



Sec. 50.25-1  General.

    (a) Materials and piping components used in the construction of 
boilers, pressure vessels, pressure piping systems, and related 
components are accepted by review of manufacturer or mill certificates 
under Sec. 50.25-3 of this part, product marking in accordance with an 
adopted industry standard, or technical information indicating their 
compliance with the requirements of this subchapter.
    (b) Plate, bar stock, pipe, tube, pipe joining fittings (tees, 
elbows, reducers, etc.), bolting, castings, forgings, and flanges, are 
accepted by review of manufacturer or mill certificates under 
Secs. 50.25-3, 50.25-5, and 50.25-7 of this part.
    (c) Valves, fluid conditioner fittings, and special purpose fittings 
complying with an adopted industry standard and marked in accordance 
with the standard are accepted through review of the marking indicating 
compliance with the adopted industry standard.
    (d) Valves, fluid conditioner fittings, special purpose fittings, 
and pipe joining fittings not complying with an adopted industry 
standard are accepted for use on a case-by-case basis. Acceptance is 
granted by the Marine Safety Center or the Officer in Charge, Marine 
Inspection, having cognizance over the installation of the product. To 
obtain

[[Page 103]]

acceptance of a product, the manufacturer must submit, via the vessel 
owner or representative, the information described in Sec. 50.25-10 of 
this part to the Marine Safety Center or the cognizant Officer in 
Charge, Marine Inspection.
    (e) Components designed for hydraulic service which require shock 
testing under Sec. 58.30-15(f) of this chapter and nonmetallic flexible 
hose assemblies must be accepted by the Commandant (G-MSE). 
Manufacturers desiring acceptance of these products must submit 
information necessary to show compliance with Secs. 56.60-25(c) or 
58.30-17 of this chapter, as applicable. Acceptance of specific 
installations of acceptable nonmetallic flexible hose assemblies and 
shock tested hydraulic components is granted by the Marine Safety Center 
or the cognizant Officer in Charge, Marine Inspection, as described in 
paragraph (d) of this section.
    (f) The vessel owner or representative shall make available to the 
Officer in Charge, Marine Inspection, the manufacturer or mill 
certificates, specific letters of acceptance, or approved plans 
necessary to verify that piping components comply with the requirements 
of this subchapter.

[CGD 77-140, 54 FR 40598, Oct. 2, 1989, as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; CGD 96-041, 61 FR 50727, Sept. 27, 1996]



Sec. 50.25-3  Manufacturer or mill certification.

    (a) A manufacturer or mill producing materials used in certain 
products for installation on inspected vessels, shall issue a 
certificate or mill test report which shall report the results of 
chemical analysis and mechanical properties required by the ASTM 
specification.
    (b) This certificate shall be made available to the marine inspector 
and Officer in Charge, Marine Inspection, upon request to the 
fabricator. (For exception refer to Sec. 50.25-5(d).)

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40598, Oct. 2, 1989]



Sec. 50.25-5  Products requiring manufacturer or mill certification.

    (a) Products required to be certified by a manufacturer or by mill 
certificate shall be fabricated and tested in accordance with the 
applicable specifications. Such products will not normally be subject to 
mill inspection by the Coast Guard except as required by Sec. 50.25-7.
    (b) The Officer in Charge, Marine Inspection, having cognizance over 
the installation of the products required to be certified shall ensure 
that adequate control has been exercised to identify the product with 
its manufacturer or mill certificate.
    (c) In the event that the Officer in Charge, Marine Inspection, 
determines that handling of a product has been such that proper 
identification is not possible, he may:
    (1) Require testing in his presence based on the applicable material 
or fabrication specification; or
    (2) Reject the product on the basis that it cannot be properly 
identified.
    (d) A product conforming to an acceptable material specification 
may, at the discretion of the Officer in Charge, Marine Inspection, be 
accepted without referring to its manufacturer or mill certification, 
if:
    (1) The product is marked in accordance with the identification 
marking requirements of the specification;
    (2) The marking alone is sufficient to identify that specification; 
and
    (3) In the opinion of the Officer in Charge, Marine Inspection, the 
application of the product does not require knowledge of the exact 
chemical analysis or mechanical properties enumerated on the 
manufacturer or mill certificate.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40598, Oct. 2, 1989]



Sec. 50.25-7   Testing of products required to be certified in presence of marine inspector.

    (a) Certified products are not normally tested in the presence of a 
marine inspector. The Commandant may, however, assign a marine inspector 
to witness tests required by the applicable specifications to satisfy 
himself that the requirements are met.
    (b) Marine inspectors shall have free entry at all times to those 
parts of the plant where material subject to the regulations in this 
subchapter is being manufactured. The manufacturer shall

[[Page 104]]

provide marine inspectors all reasonable facilities to satisfy them that 
the material is being manufactured in accordance with the requirements 
of the Commandant.
    (c) Unless otherwise authorized, required tests and inspections 
described in applicable specifications shall be made at the place of 
manufacture prior to shipment. Unless otherwise specified, tests shall 
be performed at room temperature. These tests when performed in the 
presence of a marine inspector will be so conducted as not to interfere 
unnecessarily with the operation of the plant.
    (d) Marine inspectors shall assure themselves that test specimens 
are marked for positive identification with the materials which they 
represent.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40599, Oct. 2, 1989]



Sec. 50.25-10  Acceptance of piping components by specific letter or approved plan.

    (a) A manufacturer of a piping component which does not comply with 
an adopted industry standard and requires acceptance by specific letter 
or approved plan must do the following:
    (1) Submit an engineering type catalog or representative drawings of 
the component which includes the pressure and temperature ratings of the 
component and identify the service for which it is intended.
    (2) Identify materials used to fabricate the component. Materials 
must meet the requirements of subpart 56.60 of this chapter. If the 
component is not manufactured to accepted material specifications, the 
manufacturer must prove equivalency to accepted material specifications 
by comparing details of the materials' chemical composition, mechanical 
properties, method of manufacture, and complete chemical and mechanical 
test results with an accepted material specification.
    (3) Identify the industry standard, if any, to which the component 
is manufactured.
    (4) Submit a description of nondestructive testing performed on the 
component.
    (5) Submit a description of the marking applied to the component.
    (6) Submit information showing compliance with the requirements of 
part 56, subparts 56.15, 56.20, 56.25, 56.30, or 56.35 of this chapter, 
as applicable.
    (7) Submit any additional information necessary to evaluate the 
component's acceptability for its intended application.
    (b) If the component is found to comply with the requirements of 
this subchapter, the component is designated as acceptable for its 
intended installation. This acceptance is in the form of a specific 
letter relating directly to the particular component or in the form of 
an approved piping system plan in which the component is identified as 
an integral part.

[CGD 77-140, 54 FR 40599, Oct. 2, 1989]



                  Subpart 50.30--Fabrication Inspection



Sec. 50.30-1   Scope.

    (a) The manufacturer shall notify the Officer in Charge, Marine 
Inspection, of the intended fabrication of pressure vessels that will 
require Coast Guard inspection.
    (b) For exemption of certain pressure vessels from shop inspection 
see Sec. 54.01-15 of this subchapter.
    (c) For a classification delineation of boilers and pressure vessels 
refer to Tables 54.01-5(a) and 54.01-5(b) of this subchapter.

[CGFR 68-82, 33 FR 18808, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9431, Mar. 8, 1985]



Sec. 50.30-10  Class I, I-L and II-L pressure vessels.

    (a) Classes I, I-L and II-L pressure vessels shall be subject to 
shop inspection at the plant where they are being fabricated, or when 
determined necessary by the Officer in Charge, Marine Inspection.
    (b) The manufacturer shall submit Class I, I-L and II-L pressure 
vessels, as defined in Parts 54 and 56 of this subchapter for shop 
inspection at such stages of fabrication as may be requested by the 
Officer in Charge, Marine Inspection.

[CGD 95-012, 60 FR 48049, Sept. 18, 1995]

[[Page 105]]



Sec. 50.30-15   Class II pressure vessels.

    (a) Class II pressure vessels shall be subject to shop inspections 
at the plant where they are being fabricated, as or when determined 
necessary by the Officer in Charge, Marine Inspection. The inspections 
described in this section are required, unless specifically exempted by 
other regulations in this subchapter.
    (b) The first inspection of Class II welded pressure vessels shall 
be performed during the welding of the longitudinal joint. At this time 
the marine inspector shall check the material and fit-up of the work, 
and ascertain that only welders who have passed the required tests are 
employed.
    (c) A second inspection of Class II welded pressure vessels shall be 
made during the welding of the circumferential joints. At this time the 
marine inspector shall check any new material being used which may not 
have been examined at the time of the first inspection, also the fit-up 
of the vessel at this stage of fabrication, and in addition, observe the 
welding and ascertain that only welders who have passed the required 
tests are employed.



Sec. 50.30-20   Class III pressure vessels.

    (a) Class III pressure vessels shall be subject to shop inspection 
at the plant where they are being fabricated, as or when determined 
necessary by the Officer in Charge, Marine Inspection. The inspection 
described in this section is required, unless specifically exempted by 
other regulations in this subchapter.
    (b) For Class III welded pressure vessels, one inspection shall be 
made during the welding of the longitudinal joint. If there is no 
longitudinal joint, the inspection shall be made during the welding of a 
circumferential joint. At this time the marine inspector shall check the 
material and fit-up of the work and see that only welders who have 
passed the required tests are employed.



PART 51--[RESERVED]






PART 52--POWER BOILERS--Table of Contents




                   Subpart 52.01--General Requirements

Sec.
52.01-1  Incorporation by reference.
52.01-2  Adoption of section I of the ASME Code.
52.01-3  Definitions of terms used in this part.
52.01-5  Plans.
52.01-10  Automatic controls.
52.01-35  Auxiliary, donkey, fired thermal fluid heater, and heating 
          boilers.
52.01-40  Materials and workmanship.
52.01-50  Fusible plugs (modifies A-19 through A-21).
52.01-55  Increase in maximum allowable working pressure.
52.01-90  Materials (modifies PG-5 through PG-13).
52.01-95  Design (modifies PG-16 through PG-31 and PG-100).
52.01-100  Openings and compensation (modifies PG-32 through PG-39, PG-
          42 through PG-55).
52.01-105  Piping, valves and fittings (modifies PG-58 and PG-59).
52.01-110  Water-level indicators, water columns, gauge-glass 
          connections, gauge cocks, and pressure gauges (modifies PG-
          60).
52.01-115  Feedwater supply (modifies PG-61).
52.01-120  Safety valves and safety relief valves (modifies PG-67 
          through PG-73).
52.01-130  Installation.
52.01-135  Inspection and tests (modifies PG-90 through PG-100).
52.01-140  Certification by stamping (modifies PG-104 through PG-113).
52.01-145  Manufacturers' data report forms (modifies PG-112 and PG-
          113).

      Subpart 52.05--Requirements for Boilers Fabricated by Welding

52.05-1  General (modifies PW-1 through PW-54).
52.05-15  Heat treatment (modifies PW-10).
52.05-20  Radiographic and ultrasonic examination (modifies PW-11 and 
          PW-41.1).
52.05-30  Minimum requirements for attachment welds (modifies PW-16).
52.05-45  Circumferential joints in pipes, tubes and headers (modifies 
          PW-41).

[[Page 106]]

            Subpart 52.15--Requirements for Watertube Boilers

52.15-1  General (modifies PWT-1 through PWT-15).
52.15-5  Tube connections (modifies PWT-9 and PWT-11).

            Subpart 52.20--Requirements for Firetube Boilers

52.20-1  General (modifies PFT-1 through PFT-49).
52.20-17  Opening between boiler and safety valve (modifies PFT-44).
52.20-25  Setting (modifies PFT-46).

                    Subpart 52.25--Other Boiler Types

52.25-1  General.
52.25-3  Feedwater heaters (modifies PFH-1).
52.25-5  Miniature boiler (modifies PMB-1 through PMB-21).
52.25-7  Electric boilers (modifies PEB-1 through PEB-19).
52.25-10  Organic fluid vaporizer generators (modifies PVG-1 through 
          PVG-12).
52.25-15  Fired thermal fluid heaters.
52.25-20  Exhaust gas boilers.

    Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18815, Dec. 18, 1968, unless otherwise 
noted.



                   Subpart 52.01--General Requirements



Sec. 52.01-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

             American Society of Mechanical Engineers (ASME)

United Engineering Center, 345 East 47th Street, New York, NY 10017
Boiler and Pressure Vessel Code, Section I, Power Boilers, July 1989 
with 1989 addenda........52.01-2; 52.01-5; 52.01-50; 52.01-90; 52.01-95; 
           52.01-100; 52.01-105; 52.01-110; 52.01-115; 52.01-120; 52.01-
          135; 52.01-140; 52.01-145; 52.05-1; 52.05-15; 52.05-20; 52.05-
           30; 52.05-45; 52.15-1; 52.15-5; 52.20-1; 52.20-17; 52.20-25; 
                                     52.25-3; 52.25-5; 52.25-7; 52.25-10

[CGD 88-032, 56 FR 35821, July 29, 1991, as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; CGD 96-041, 61 FR 50727, Sept. 27, 1996]



Sec. 52.01-2   Adoption of section I of the ASME Code.

    (a) Main power boilers and auxiliary boilers shall be designed, 
constructed, inspected, tested, and stamped in accordance with section I 
of the ASME (American Society of Mechanical Engineers) Code, as limited, 
modified, or replaced by specific requirements in this part. The 
provisions in the appendix to section I of the ASME Code are adopted and 
shall be followed when the requirements in section I make them 
mandatory. For general information Table 52.01-1(a) lists the various 
paragraphs in section I of the ASME Code which are limited, modified, or 
replaced by regulations in this part.

   Table 52.01-1(a)--Limitations and Modifications in the Adoption of   
                       Section I of the ASME Code                       
------------------------------------------------------------------------
Paragraphs in section I, ASME Code\1\ and                               
               disposition                       Unit of this part      
------------------------------------------------------------------------
PG-1 replaced by.........................  54.01-5(a)                   
PG-5 through PG-13 modified by...........  52.01-90                     
PG-16 through PG-31 modified by..........  52.01-95                     
PG-32 through PG-39 modified by..........  52.01-100                    
PG-42 through PG-55 modified by..........  52.01-100                    
PG-58 and PG-59 modified by..............  52.01-105                    
PG-60 modified by........................  52.01-110                    
PG-61 modified by........................  52.01-115                    
                                           (56.50-30)                   
PG-67 through PG-73 modified by..........  52.01-120                    
PG-90 through PG-100 modified by.........  52.01-135                    
                                           (52.01-95)                   
PG-91 modified by........................  52.01-135(b)                 
PG-99 modified by........................  52.01-135(c)                 
PG-100 modified by.......................  52.01-95(e)                  
PG-104 through PG-113 modified by........  52.01-140(a)                 
PG-112 and PG-113 modified by............  52.01-145                    
PW-1 through PW-54 modified by...........  52.05-1                      
PW-10 modified by........................  52.05-15                     
PW-11.1 modified by......................  52.05-20                     
PW-16 modified by........................  52.05-30                     
PW-41 modified by........................  52.05-20, 52.05-45           
PWT-1 through PWT-15 modified by.........  52.15-1                      

[[Page 107]]

                                                                        
PWT-9 modified by........................  52.15-5                      
PWT-9.2 replaced by......................  52.15-5(b)                   
PWT-11 modified by.......................  52.15-5                      
PWT-11.3 replaced by.....................  52.15-5(b)                   
PFT-1 through PFT-49 modified by.........  52.20-1                      
PFT-44 modified by.......................  52.20-17                     
PFT-46. modified by......................  52.20-25                     
PFH-1 modified by........................  52.25-3                      
PMB-1 through PMB-21 modified by.........  52.25-5                      
PEB-1 through PEB-19 modified by.........  52.25-7                      
PVG-1 through PVG-12 modified by.........  52.25-10                     
A-19 through A-21 modified by............  52.01-50                     
------------------------------------------------------------------------
\1\ The references to specific provisions in the ASME Code are coded.   
  The first letter ``P'' refers to section I, while the letter ``A''    
  refers to the appendix to section I. The letter or letters following  
  ``P'' refer to a specific subsection of section I. The number         
  following the letter or letters refers to the paragraph so numbered in
  the text.                                                             

    (b) References to the ASME Code, such as paragraph PG-1, indicate:

    P=Section I, Power Boilers ASME Code.
    G=Subsection--General.
    1=Paragraph 1.

    (c) When a section or paragraph of the regulations in this part 
relates to material in section I of the ASME Code, the relationship with 
the code will be shown immediately following the heading of the section 
or at the beginning of the paragraph as follows:
    (1) (Modifies P ------.) This indicates that the material in P ----
-- is generally applicable but is being altered, amplified or augmented.
    (2) (Replaces P ------.) This indicates that P ------ does not 
apply.
    (3) (Reproduces P ------.) This indicates that P ------ is being 
identically reproduced for convenience, not for emphasis.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9975, June 17, 1970; CGD 81-79, 50 FR 9431, Mar. 8, 1985. 
Redesignated and amended by CGD 88-032, 56 FR 35821, July 29, 1991]



Sec. 52.01-3   Definitions of terms used in this part.

    (a) Types of boilers--(1) Main power boiler. A main power boiler is 
a steam boiler used for generating steam for main propulsion.
    (2) Auxiliary or donkey boiler. An auxiliary or donkey boiler is a 
steam boiler used for all purposes, including emergency propulsion, for 
which steam may be required other than main propulsion.
    (3) Watertube boiler. A watertube boiler is a steam boiler in which 
the boiler tubes contain water and steam. The heat is applied to the 
outside surface of the tubes.
    (4) Internally fired firetube boiler (scotch boiler). An internally 
fired firetube boiler is a steam boiler containing furnaces, one or more 
combustion chambers and tubes or flues, which are surrounded by water 
and through which the products of combustion pass from the furnace to 
the uptake. In such boilers no part of the shell is in contact with the 
fire or products of combustion.
    (5) Externally fired firetube or flue boiler (horizontal return 
tubular). An externally fired firetube or flue boiler is a steam boiler, 
part of the outer shell of which is exposed to fire or to the products 
of combustion, and containing flues through which such products pass 
from the furnace to the uptake.
    (6) High temperature water boiler. A high temperature water boiler 
is a boiler containing water at a temperature exceeding 250 deg. F.
    (7) Packaged boiler. A packaged boiler is a steam boiler equipped, 
and shipped complete with fuel burning equipment, mechanical draft 
equipment, feed water apparatus and all necessary controls for manual or 
automatic operation, all completely mounted on a common base and 
requiring only to be connected to fuel, water and electric supplies to 
be ready for use.
    (8) Fired steam boiler. A pressure vessel in which steam is 
generated by the application of heat resulting from the combustion of 
fuel is classed as a fired steam boiler.
    (9) Unfired steam boiler. A pressure vessel in which steam is 
generated by means other than fuel combustion is classed as an unfired 
steam boiler. (See Sec. 54.01-10 of this subchapter.)
    (10) Hybrid boiler. A hybrid boiler is a steam boiler whose design 
employs features from both watertube and firetube boilers.
    (b) Parts of boilers--(1) Shell. The shell is the structure forming 
the outer envelope of a boiler drum, or pressure vessel consisting of 
one or more plates

[[Page 108]]

properly joined (or of seamless construction) as specified in this part. 
This does not include tube sheets or heads.
    (2) Heads. The heads are the ends of a boiler or pressure vessel. 
They may be flat or dished, stayed or unstayed.
    (i) Dished heads. Dished heads are heads formed to a segment of a 
sphere or to a hemispherical or elliptical section and may be attached 
to the shell so that the pressure will be either on the concave or on 
the convex side.
    (ii) Stayed heads. Stayed heads are heads supported in whole or in 
part by stays, furnaces, flues, tubes, etc.
    (3) Water wall. A water wall is a series of tubes or elements spaced 
along or integral with a wall of a furnace to protect the wall and 
provide additional heating surface.
    (4) Header. A header is a hollow forging, pipe, or welded plate of 
cylindrical, square, or rectangular cross section, serving as a manifold 
to which tubes are connected.
    (5) Superheater. A superheater is an appliance for the purpose of 
increasing the temperature of steam.
    (6) Economizer. An economizer is a feed-water heater usually located 
in the uptake or casing of a boiler to absorb heat from the waste gases.
    (7) Domes. Domes are superstructures of shells, attached by 
riveting, bolting, or welding. They generally consist of a cylindrical 
shell with one end flanged for attachment to the main shell and the 
other end closed by a head which may be integral with, riveted, or 
welded to the shell.
    (8) Steam chimneys. Steam chimneys are superstructures of steam 
boilers which are fitted with a lining inside of which the products of 
combustion pass to the smokestack. They may be constructed in the form 
of a dome integral with the boiler or as independent steam vessels 
connected by piping to the boiler.
    (9) Furnace. A furnace is a firebox or a large flue in which the 
fuel is burned.
    (i) Corrugated furnace. A corrugated furnace is a cylindrical shell 
wherein corrugations are formed circumferentially for additional 
strength and to provide for expansion.
    (ii) Plain furnace. A plain furnace is a cylindrical shell usually 
made in sections joined by means of riveting or welding.
    (10) Combustion chamber. A combustion chamber is that part of an 
internally fired boiler in which combustible gases may be burned after 
leaving the furnace.
    (i) Separate combustion chamber. A separate combustion chamber is a 
combustion chamber which is connected to one furnace only.
    (ii) Common combustion chamber. A common combustion chamber is a 
combustion chamber connected to two or more furnaces in a bolier.
    (iii) Crown or top plate. A crown or top plate is the top of a 
combustion chamber and is usually supported by girder stays or by sling 
stays or braces.
    (iv) Curved bottom plate. A curved bottom plate is the bottom of a 
separate combustion chamber formed to an arc of a circle and usually 
designed to be self-supporting.
    (v) Combustion chamber tube sheet. A combustion chamber tube sheet 
is the plate forming the end of a combustion chamber in which the tubes 
are secured.
    (vi) Combustion chamber back sheet. A combustion chamber back sheet 
is the plate opposite the tube sheet forming the back of the combustion 
chamber. It is usually stayed to the back head of the boiler by means of 
screw staybolts, or, in the case of double-ended boilers, to the back of 
the combustion chamber of the other end of the boiler.
    (11) Flues. Flues are cylindrical shells made of seamless or welded 
tubing, or with a riveted longitudinal joint, the ends being attached by 
riveting or welding. Their purpose is to provide additional heating 
surface and to form a path for the products of combustion.
    (12) Tubes. Tubes are cylindrical shells of comparatively small 
diameter constituting the main part of the heating surface of a boiler 
or superheater.
    (i) Seamless tube. A seamless tube is a tube without any 
longitudinal joint.
    (ii) Electric-resistance-welded tube. An electric-resistance-welded 
tube is a tube the longitudinal joint of which is made by the electric-
resistance butt welding process.
    (iii) Stay tube. A stay tube is a thickwalled tube, the end of which 
is

[[Page 109]]

usually thickened by upsetting to compensate for threading. Such tubes 
are used for staying tube sheets into which they are screwed and 
expanded.
    (13) Tube sheet. A tube sheet is a portion of a boiler drum, or 
header perforated for the insertion of tubes.
    (14) Ligament. The ligament is the section of metal between the 
holes in a tube sheet.
    (i) Longitudinal ligament. A longitudinal ligament is the minimum 
section of metal between two tube holes on a line parallel with the axis 
of the drum.
    (ii) Circumferential ligament. A circumferential ligament is the 
minimum section of metal between two tube holes on a line around the 
circumference of the drum.
    (iii) Diagonal ligament. A diagonal ligament is the minimum section 
of metal between two tube holes in adjacent rows, measured diagonally 
from one row to the other.
    (c) Stays and supports. (1) Surfaces to be stayed. Surfaces to be 
stayed or reinforced include flat plates, heads, or areas thereof, such 
as segments of heads, wrapper sheets, furnace plates, side sheets, 
combustion chamber tops, etc., which are not self-supporting; and curved 
plates, constituting the whole or parts of a cylinder subject to 
external pressure, which are not entirely self-supporting.
    (2) Through stay. A through stay is a solid bar extending through 
both heads of a boiler and threaded at the ends for attachment by means 
of nuts. With this type of stay the ends are usually upset to compensate 
for the threading. (See Figure 52.01-3(a).)
    (3) Solid screw staybolt. A solid screw staybolt is a threaded bar 
screwed through the plates, the ends being riveted over or fitted with 
nuts or welded collars. (See Figure 52.01-3(b).)
    (4) Welded collar. A welded collar is a beveled ring formed around 
the end of a screw stay by means of arc- or gas-welding. It is used in 
lieu of a nut. (See Figure 52.01-3(1).)
    (5) Hollow screw staybolt. A hollow screw staybolt is a hollow 
threaded bar screwed through the plate, the ends being riveted over or 
fitted with nuts or welded collars. (See Figure 52.01-3(c).)
    (6) Flexible staybolt. A flexible staybolt is a bar made with ball-
and-socket joint on one end, the cup of the socket being screwed into 
the outside sheet and covered with a removable cap, the plain end of the 
staybolt being threaded, screwed through the inside sheet and riveted 
over. (See Figure 52.01-3(d).)
    (7) Sling stay. A sling stay is a flexible stay consisting of a 
solid bar having one or both ends forged for a pin connection to a 
crowfoot or other structural fitting secured to the stayed plate. (See 
Figure 52.01-3(e).)
    (8) Crowfoot. A crowfoot is a forged fitting with palms or lugs 
secured to the head to form a proper connection with a sling stay. (See 
Figure 52.01-3(f).)
    (9) Crowfoot stay. A crowfoot stay is a solid bar stay terminating 
in a forged fork with palms or lugs for attachment to the plate. (See 
Figure 52.01-3(g).)
    (10) Diagonal stay. A diagonal stay is a bar or formed plate forged 
with palms or lugs for staying the head of the boiler to the shell 
diagonally. (See Figure 52.01-3(h).)
    (11) Gusset stay. A gusset stay is a triangular plate used for the 
same purpose as a diagonal stay and attached to the head and the shell 
by angles, flanges, or other suitable means of attachment. (See Figure 
52.01-3(i).)
    (12) Dog stay. A dog stay is a staybolt, one end of which extends 
through a girder, dog, or bridge, and is secured by a nut, the other end 
being screwed through the plate which it is supporting and riveted over 
or fitted with a nut or welded collar. (See Figure 52.01-3(j).)
    (13) Girder. A girder is a bridge, built up of plates of structural 
shapes separated by distance pieces, a forging, or a formed plate, which 
spans an area requiring support, abutting thereon and supporting the 
girder stays or staybolts. (See Figure 52.01-3(k).)
    (14) Structural stiffeners. Structural stiffeners are rolled shapes 
or flanged plates which are used to stiffen a surface which is not 
entirely self-supporting.
    (15) Reinforcement. A reinforcement is a doubling plate, washer, 
structural shape, or other form for stiffening or strengthing a plate.

[[Page 110]]

    (d) Pressure relief devices. For boilers, pressure vessels, and 
pressure piping, a pressure relief device is designed to open to prevent 
a rise of internal fluid pressure in excess of a specified value due to 
exposure to emergency or abnormal conditions. It may also be designed to 
prevent excessive internal vacuum. It may be a pressure relief valve, a 
nonreclosing pressure relief device or a vacuum relief valve.
    (1) Pressure relief valve. A pressure relief valve is a pressure 
relief device which is designed to reclose and prevent the further flow 
of fluid after normal conditions have been restored.
    (i) Safety valve. A safety valve is a pressure relief valve actuated 
by inlet static pressure and characterized by rapid opening or pop 
action. Examples of types used on boilers include:
    (A) Spring-loaded safety valve. A spring-loaded safety valve is a 
safety valve fitted with a spring which normally holds the valve disk in 
a closed position against the seat and allows it to open or close at 
predetermined pressures. Spring-loaded safety valves are characterized 
by pop action.
    (B) Pressure loaded pilot actuated safety valve. A pressure loaded 
pilot actuated safety valve is one which is held in a closed position by 
steam pressure and controlled in operation by a pilot actuator valve.
    (C) Spring loaded pilot actuated safety valve. A spring loaded, 
pilot actuated safety valve is one in which a spring is used in the 
conventional way to hold the disk against the seat, but which has a 
piston attached to the spindle and enclosed within a cylinder, which 
when subjected to a limiting or set pressure, unbalances the spring load 
thereby opening the valve.
    (D) Spring loaded pilot valve. A spring loaded pilot valve is a 
conventional safety valve designed to actuate another spring loaded 
safety valve through a pressure transmitting line led from the body of 
the pilot valve.
    (ii) Relief valve. A relief valve is a pressure relief valve 
actuated by inlet static pressure which opens in proportion to the 
increase in pressure over the opening pressure.
    (iii) Safety relief valve. A safety relief valve is a pressure 
relief valve characterized by rapid opening or pop action, or by opening 
in proportion to the increase in pressure over the opening pressure, 
depending on application.
    (A) Conventional safety relief valve. A conventional safety relief 
valve has its spring housing vented to the discharge side of the valve. 
The performance characteristics (opening pressure, closing pressure, 
lift and relieving capacity) are directly affected by changes of the 
back pressure on the valve.
    (B) Balanced safety relief valve. A balanced safety relief valve 
incorporates means of minimizing the effect of back pressure on the 
operational characteristics (opening pressure, closing pressure, lift 
and relieving capacity).
    (C) Internal spring safety relief valve. An internal spring safety 
relief valve incorporates the spring and all or part of the operating 
mechanism within the pressure vessel.
    (iv) Pilot operated pressure relief valve. A pilot operated pressure 
relief valve is a pressure relief valve in which the major relieving 
device is combined with and is controlled by a self-actuated auxiliary 
pressure relief valve.
    (v) Power actuated relief valve. A power actuated pressure relief 
valve is a pressure relief valve in which the major relieving device is 
combined with and controlled by a device requiring an external source of 
energy.
    (vi) Temperature actuated pressure relief valve. A temperature 
actuated pressure relief valve is a pressure relief valve. A spring 
loaded, pilot actuated internal temperature.
    (2) Nonreclosing pressure relief device. A nonreclosing pressure 
relief device is a pressure relief device not designed to reclose after 
operation.
    (i) Rupture disk device. A rupture disk device is a device actuated 
by inlet static pressure and designed to function by the bursting of a 
pressure retaining disk.
    (ii) Explosion rupture disk device. An explosion rupture disk device 
is a rupture disk device designed for use at high rates of pressure 
rise.
    (iii) Breaking pin device. A breaking pin device is a device 
actuated by inlet static pressure and designed to function by the 
breakage of a load carrying section of a pin which supports a pressure 
retaining member.

[[Page 111]]

    (iv) Shear pin device. A shear pin device is a device actuated by 
inlet static pressure and designed to function by the shearing of a load 
carrying pin which supports the pressure retaining member.
    (v) Fusible plug device. A fusible plug device is a device designed 
to function by the yielding or melting of a plug of suitable melting 
temperature.
    (vi) Frangible disk device. A frangible disk device is the same as a 
rupture disk device.
    (vii) Bursting disk device. A bursting disk device is the same as a 
rupture disk device.
    (3) Vacuum relief valve. A vacuum relief valve is a valve designed 
to admit fluid to prevent an excessive internal vacuum.
    (e) Other boiler attachments. (1) Mountings. Mountings are nozzle 
connections, distance pieces, valves, or fittings attached directly to 
the boiler.
    (2) Main steam stop valve. A main steam stop valve is a valve 
usually connected directly to the boiler for the purpose of shutting off 
the steam from the main steam line.
    (3) Auxiliary steam stop valve. An auxiliary steam stop valve is a 
valve usually connected directly to the boiler for the purpose of 
shutting off the steam from the auxiliary lines (including the whistle 
lines).
    (4) Manifold. A manifold is a fitting with two or more branches 
having valves either attached by bolting or integral with the fitting.
    (5) Feed valve. A feed valve is a valve in the feed-water line which 
controls the boiler feed.
    (6) Blowoff valve. A blowoff valve is a valve connected directly to 
the boiler for the purpose of blowing out water, scum or sediment.
    (7) Dry pipe. A dry pipe is a perforated or slotted pipe placed in 
the highest part of the steam space of a boiler to prevent priming.
    (8) Water column. A water column is a fitting or tube equipped with 
a water glass attached to a boiler for the purpose of indicating the 
water level.
    (9) Test cocks. Test cocks are small cocks on a boiler for 
indicating the water level.
    (10) Salinometer cocks. Salinometer cocks are cocks attached to a 
boiler for the purpose of drawing off a sample of water for salinity 
tests.
    (11) Fusible plugs. Fusible plugs are plugs made with a bronze 
casing and a tin filling which melts at a temperature of 445 deg. to 
450 deg. F. They are intended to melt in the event of low water and thus 
warn the engineer on watch.
    (f) Boiler fabrication. (1) Repair. Repair is the restoration of any 
damaged or impaired part to an effective and safe condition.
    (2) Alteration. Alteration is a structural modification to or 
departure from an approved design or existing construction.
    (3) Expanding. Expanding is the process of enlarging the end of a 
tube to make it fit tightly in the tube sheet.
    (4) Beading. Beading is the process of turning over the protruding 
end of a tube after expanding to form a supporting collar for the tube 
sheet.
    (5) Bell-mouthing. Bell-mouthing is the process of flaring the end 
of a tube beyond where it is expanded in the tube sheet.
    (6) Telltale hole. A telltale hole is a small hole having a diameter 
not less than three-sixteenths inch drilled in the center of a solid 
stay, and extending to at least one-half inch beyond the inside surface 
of the sheet.
    (7) Access or inspection openings. Access or inspection openings are 
holes cut in the shells or heads of boilers or boiler pressure part for 
the purpose of inspection and cleaning.
    (8) Openings. Openings are holes cut in shells or heads of boilers 
or boiler pressure parts for the purpose of connecting nozzles, domes, 
steam chimneys, or mountings.
    (g) Pressure. The term pressure is an abbreviation of the more 
explicit expression ``difference in pressure intensity.'' It is measured 
in terms such as pounds per square inch (p.s.i.).
    (1) Gage (or gauge) pressure. Gage pressure is the difference 
between the pressure at the point being measured and the ambient 
pressure for the gage. It is measured in units such as pounds per square 
inch gage (p.s.i.g.).
    (2) Absolute pressure. Absolute pressure is the difference between 
the pressure at the point being measured and

[[Page 112]]

that of a perfect vacuum. It is measured in units such as pounds per 
square inch absolute (p.s.i.a.).
    (3) Internal pressure. Internal pressure refers to a situation where 
the pressure inside exceeds that outside the volume being described.
    (4) External pressure. External pressure refers to a situation where 
the pressure outside exceeds that inside the volume being described.
    (5) Maximum allowable working pressure. For a definition of maximum 
allowable working pressure, see Sec. 54.10-5 of this subchapter.

[[Page 113]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.019



            Figure 52.01-3--Acceptable Types of Boiler Stays.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9976, June 17, 1970; CGD 81-79, 50 FR 9431, Mar. 8, 1985; CGD 83-043, 
60 FR 24772, May 10, 1995]

[[Page 114]]



Sec. 52.01-5  Plans.

    (a) Manufacturers intending to fabricate boilers to be installed on 
vessels shall submit detailed plans as required by subpart 50.20 of this 
subchapter. The plans, including design calculations, must be certified 
by a registered professional engineer as meeting the design requirements 
in this part and in section I of the ASME Code.
    (b) The following information must be included:
    (1) Calculations for all pressure containment components including 
the maximum allowable working pressure and temperature, the hydrostatic 
or pneumatic test pressure, the maximum steam generating capacity and 
the intended safety valve settings.
    (2) Joint design and methods of attachment of all pressure 
containment components.
    (3) A bill of material meeting the requirements of section I of the 
ASME Code, as modified by this subpart.
    (4) A diagrammatic arrangement drawing of the assembled unit 
indicating the location of internal and external components including 
any interconnecting piping.

(Approved by the Office of Management and Budget under control number 
2115-0142)

[CGD 81-79, 50 FR 9432, Mar. 8, 1985]



Sec. 52.01-10  Automatic controls.

    (a) Each main boiler must meet the special requirements for 
automatic safety controls in Sec. 62.35-20(a)(1) of this chapter.
    (b) Each automatically controlled auxiliary boiler having a heat 
input rating of less than 12,500,000 Btu/hr. (3.66 megawatts) must meet 
the requirements of part 63 of this chapter.
    (c) Each automatically controlled auxiliary boiler with a heat input 
rating of 12,500,000 Btu/hr. (3.66 megawatts) or above, must meet the 
requirements for automatic safety controls in part 62 of this chapter.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-030, 53 FR 
17837, May 18, 1988; CGD 88-057, 55 FR 24236, June 15, 1990]



Sec. 52.01-35   Auxiliary, donkey, fired thermal fluid heater, and heating boilers.

    (a) To determine the appropriate part of the regulations where 
requirements for miscellaneous boiler types, such as donkey, fired 
thermal fluid heater, heating boiler, etc., may be found, refer to Table 
54.01-5(a) of this subchapter.
    (b) Fired vessels in which steam is generated at pressures exceeding 
103 kPa gage (15 psig) shall meet the requirements of this part.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9432, Mar. 8, 1985]



Sec. 52.01-40   Materials and workmanship.

    All materials to be used in any of the work specified in the various 
sections of this part shall be free from injurious defects and shall 
have a workmanlike finish. The construction work shall be executed in a 
workmanlike manner with proper tools or equipment and shall be free from 
defects which would impair strength or durability.



Sec. 52.01-50   Fusible plugs (modifies A-19 through A-21).

    (a) All boilers, except watertube boilers, with a maximum allowable 
working pressure in excess of 206 kPa gage (30 psig), if fired with 
solid fuel not in suspension, or if not equipped for unattended waterbed 
operation, must be fitted with fusible plugs. Fusible plugs must comply 
with only the requirements of A19 and A20 of the ASME Code and be 
stamped on the casing with the name of the manufacturer, and on the 
water end of the fusible metal ``ASME Std.''. Fusible plugs are not 
permitted where the maximum steam temperature to which they are exposed 
exceeds 218  deg.C (425  deg.F).
    (b) Vertical boilers shall be fitted with one fusible plug located 
in a tube not more than 2 inches below the lowest gage cock.
    (c) Externally fired cylindrical boilers with flues shall have one 
plug fitted to the shell immediately below the fire line not less than 4 
feet from the front end.

[[Page 115]]

    (d) Firebox, Scotch, and other types of shell boilers not 
specifically provided for, having a combustion chamber common to all 
furnaces, shall have one plug fitted at or near the center of the crown 
sheet of the combustion chamber.
    (e) Double-ended boilers, having individual combustion chambers for 
each end, in which combustion chambers are common to all the furnaces in 
one end of the boiler, shall have one plug fitted at or near the center 
of the crown sheet of each combustion chamber.
    (f) Boilers constructed with a separate combustion chamber for each 
individual furnace shall be fitted with a fusible plug in the center of 
the crown sheet of each combustion chamber.
    (g) Boilers of types not provided for in this section shall be 
fitted with at least one fusible plug of such dimensions and located in 
a part of the boiler as will best meet the purposes for which it is 
intended.
    (h) Fusible plugs shall be so fitted that the smaller end of the 
filling is in direct contact with the radiant heat of the fire, and 
shall be at least 1 inch higher on the water side than the plate or flue 
in which they are fitted, and in no case more than 1 inch below the 
lowest permissible water level.
    (i) The lowest permissible water level shall be determined as 
follows:
    (1) Vertical firetube boilers, one-half of the length of the tubes 
above the lower tube sheets.
    (2) Vertical submerged tube boilers 1 inch above the upper tube 
sheet.
    (3) Internally fired firetube boilers with combustion chambers 
integral with the boiler, 2 inches above the highest part of the 
combustion chamber.
    (4) Horizontal-return tubular and dry back Scotch boilers, 2 inches 
above the top row of tubes.
    (j) [Reserved]
    (k)(1) Fusible plugs shall be cleaned and will be examined by the 
marine inspector at each inspection for certification, and oftener if 
necessary. If in the marine inspector's opinion the condition of any 
plug is satisfactory, it may be continued in use.
    (2) When fusible plugs are renewed at other than the inspection for 
certification and no marine inspector is in attendance, the Chief 
Engineer shall submit a written report to the Officer in Charge, Marine 
Inspection, who issued the certificate of inspection informing him of 
the renewal. This letter report shall contain the following information:
    (i) Name and official number of vessel.
    (ii) Date of renewal of fusible plugs.
    (iii) Number and location of fusible plugs renewed in each boiler.
    (iv) Manufacturer and heat number of each plug.
    (v) Reason for renewal.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9432, Mar. 8, 1985]



Sec. 52.01-55   Increase in maximum allowable working pressure.

    (a) When the maximum allowable working pressure of a boiler has been 
established, an increase in the pressure settings of its safety valves 
shall not be granted unless the boiler design meets the requirements of 
this subchapter in effect at the time the boiler was contracted for or 
built; but in no case will a pressure increase be authorized for boilers 
constructed prior to the effective date of the regulations dated 
November 19, 1952, if the minimum thickness found by measurement shows 
that the boiler will have a factor of safety of less than 4\1/2\. The 
piping system, machinery, and appurtenances shall meet the present 
requirements of this subchapter for the maximum allowable working 
pressure requested. An increase in pressure shall be granted only by the 
Commandant upon presentation of data or plans proving that the requested 
increase in pressure is justified.
    (b) When an existing boiler is replaced by a new boiler designed to 
operate at pressures in excess of the pressure indicated on the 
certificate of inspection for the previous boiler, an analysis of the 
complete system shall be made, including machinery and piping, to insure 
its compatibility with the increased steam pressure. The maximum 
allowable working pressure on the certificate of inspection shall be 
based on the results of this analysis.

[[Page 116]]



Sec. 52.01-90   Materials (modifies PG-5 through PG-13).

    (a) Materials subject to stress due to pressure shall conform to 
specifications as indicated in paragraph PG-5 through PG-13 of the ASME 
Code except as noted otherwise in this section.
    (b) Material not fully identified with an ASME Code approved 
specification may be accepted as meeting Coast Guard requirements 
provided it satisfies the conditions indicated in paragraph PG-10 of the 
ASME Code.
    (c) (Modifies PG-5.5) When the maximum allowable working pressure 
(See PG-21) exceeds 15 pounds per square inch, cross pipes connecting 
the steam and water drums of water tube boilers, headers, cross boxes 
and all pressure parts of the boiler proper shall be made of a wrought 
or cast steel listed in Table PG-23.1 of the ASME Code.
    (d) (Modifies PG-8.2.2.) The use of cast iron for mountings, 
fittings, valves, or cocks attached directly to boilers operating at 
pressures exceeding 15 pounds per square inch is prohibited.
    (e) (Modifies PG-11.1.1.) The material, design, construction and 
workmanship of pumps shall be at least equivalent to the standards 
established by the American Bureau of Shipping or other recognized 
classification society. See part 58 of this subchapter.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40163, Sept. 2, 1975; CGD 81-79, 50 FR 9432, Mar. 8, 1985]



Sec. 52.01-95   Design (modifies PG-16 through PG-31 and PG-100).

    (a) Requirements. Boilers required to be designed to this part shall 
meet the requirements of PG-16 through PG-31 of the ASME Code except as 
noted otherwise in this section.
    (b) Superheater. (1) The design pressure of a superheater integral 
with the boiler shall not be less than the lowest setting of the drum 
safety valve.
    (2) Controls shall be provided to insure that the maximum 
temperature at the superheater outlets does not exceed the allowable 
temperature limit of the material used in the superheater outlet, in the 
steam piping, and in the associated machinery under all operating 
conditions including boiler overload. Controls need not be provided if 
the operating superheater characteristic is demonstrated to be such that 
the temperature limits of the material will not be exceeded. Visible and 
audible alarms indicating excessive superheat shall be provided in any 
installation in which the superheater outlet temperature exceeds 454 
deg.C (850  deg.F). The setting of the excessive superheat alarms must 
not exceed the maximum allowable temperature of the superheater outlet, 
which may be limited by the boiler design, the main steam piping design, 
or the temperature limits of other equipment subjected to the 
temperature of the steam.
    (3) Arrangement shall be made for venting and draining the 
superheater in order to permit steam circulation through the superheater 
when starting the boiler.
    (c) Economizer. The design pressure of an economizer integral with 
the boiler and connected to the boiler drum without intervening stop 
valves shall be at least equal to 110 percent of the highest setting of 
the safety valves on the drum.
    (d) Brazed boiler steam air heaters. Boiler steam air heaters 
utilizing brazed construction are permitted at temperature not exceeding 
525 deg. F. Refer to Sec. 56.30-30(b)(1) of this subchapter for 
applicable requirements.
    (e) Stresses. (Modifies PG-22). The stresses due to hydrostatic head 
shall be taken into account in determining the minimum thickness of the 
shell or head of any boiler pressure part unless noted otherwise. 
Additional stresses, imposed by effects other than internal pressure or 
static head, which increase the average stress over substantial sections 
of the shell or head by more than 10 percent of the allowable stress 
shall be taken into account. These effects include the weight of the 
vessel and its contents, method of support, impact loads, superimposed 
loads, localized stresses due to the reactions of supports, stresses due 
to temperature gradients and dynamic effects.
    (f) Cylindrical components under internal pressure. (Modifies PG-
27.) The minimum required thickness and maximum allowable working 
pressure of boiler piping, tubes, drums and headers shall be as required 
by the formula in PG-27

[[Page 117]]

of the ASME Code except that threaded boiler tubes are not permitted.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9432, Mar. 8, 1985]



Sec. 52.01-100  Openings and compensation (modifies PG-32 through PG-39, PG-42 through PG-55).

    (a) The rules for openings and compensation shall be as indicated in 
PG-32 through PG-55 of the ASME Code except as noted otherwise in this 
section.
    (b) (Modifies PG-39.) Pipe and nozzle necks shall be attached to 
vessel walls as indicated in PG-39 except that threaded connections 
shall not be used under any of the following conditions:
    (1) Pressures greater than 4137 kPa (600 psig);
    (2) Nominal diameters greater than 51mm (2 in.); or
    (3) Nominal diameters greater than 19mm (0.75 in.) and pressures 
above 1034 kPa (150 psig).
    (c) (Modifies PG-42). Butt welding flanges and fittings must be used 
when full radiography is required by Sec. 56.95-10.

[CGD 81-79, 50 FR 9432, Mar. 8, 1985]



Sec. 52.01-105  Piping, valves and fittings (modifies PG-58 and PG-59).

    (a) Boiler external piping within the jurisdiction of the ASME Code 
must be as indicated in PG-58 and PG-59 of the ASME Code except as noted 
otherwise in this section. Piping outside the jurisdiction of the ASME 
Code must meet the appropriate requirements of part 56 of this 
subchapter.
    (b) In addition to the requirements in PG-58 and PG-59 of the ASME 
Code, boiler external piping must:
    (1) Meet the design conditions and criteria in Sec. 56.07-10 of this 
subchapter, except Sec. 56.07-10(b);
    (2) Be included in the pipe stress calculations required by 
Sec. 56.31-1 of this subchapter;
    (3) Meet the nondestructive examination requirements in Sec. 56.95-
10 of this subchapter;
    (4) Have butt welding flanges and fittings when full radiography is 
required; and
    (5) Meet the requirements for threaded joints in Sec. 56.30-20 of 
this subchapter.
    (c) Steam stop valves, in sizes exceeding 152mm (6 inch) NPS, must 
be fitted with bypasses for heating the line and equalizing the pressure 
before the valve is opened.
    (d) Feed connections. (1) Feed water shall not be discharged into a 
boiler against surfaces exposed to hot gases or radiant heat of the 
fire.
    (2) Feed water nozzles of boilers designed for pressures of 2758 kPa 
(400 psi), or over, shall be fitted with sleeves or other suitable means 
employed to reduce the effects of metal temperature differentials.
    (e) Blowoff connections. (1) Firetube and drum type boilers shall be 
fitted with a surface and a bottom blowoff valve or cock attached 
directly to the boiler or to a short distance piece. The surface blowoff 
valve shall be located within the permissible range of the water level, 
or fitted with a scum pan or pipe at this level. The bottom blowoff 
valve shall be attached to the lowest part of the boiler or fitted with 
an internal pipe leading to the lowest point inside the boiler. 
Watertube boilers designed for pressures of 2413 kPa (350 psig) or over 
are not required to be fitted with a surface blowoff valve. Boilers 
equipped with a continuous blowdown valve on the steam drum are not 
required to be fitted with an additional surface blowoff connection.
    (2) Where blowoff pipes are exposed to radiant heat of the fire, 
they must be protected by fire brick or other suitable heat-resisting 
material.
    (f) Dry pipes. Internal dry pipes may be fitted to the steam drum 
outlet provided the dry pipes have a diameter equal to the steam drum 
outlet and a wall thickness at least equal to standard commercial pipe 
of the same diameter. Openings in dry pipes must be as near as 
practicable to the drum outlet and must be slotted or drilled. The width 
of the slots must not be less than 6mm (0.25 in.). The diameter of the 
holes must not be less than 10mm (0.375 in.). Where dry pipes are used, 
they must be provided with drains at each end to prevent an accumulation 
of water.

[CGD 81-79, 50 FR 9432, Mar. 8, 1985]

[[Page 118]]



Sec. 52.01-110  Water-level indicators, water columns, gauge-glass connections, gauge cocks, and pressure gauges (modifies PG-60).

    (a) Boiler water level devices. Boiler water level devices shall be 
as indicated in PG-60 of the ASME Code except as noted otherwise in this 
section.
    (b) Water level indicators (modifies PG-60.1). (1) Each boiler, 
except those of the forced circulation type with no fixed water line and 
steam line, shall have two independent means of indicating the water 
level in the boiler connected directly to the head or shell. One shall 
be a gage lighted by the emergency electrical system (See Subpart 112.15 
of Subchapter J (Electrical Engineering) of this chapter) which will 
insure illumination of the gages under all normal and emergency 
conditions. The secondary indicator may consist of a gage glass, or 
other acceptable device. Where the allowance pressure exceeds 1724 kPa 
(250 psi), the gage glasses shall be of the flat type instead of the 
common tubular type.
    (2) Gage glasses shall be in continuous operation while the boiler 
is steaming.
    (3) Double-ended firetube boilers shall be equipped as specified in 
this paragraph and paragraph (e) of this section except that the 
required water level indicators shall be installed on each end of the 
boiler.
    (4) Externally fired flue boilers, such as are used on central 
western river vessels, shall be equipped as specified in paragraphs (b) 
(1) through (3) of this section except that float gages may be 
substituted for gage glasses.
    (c) Water columns (modifies PG-60.2). The use of water columns is 
generally limited to firetube boilers. Water column installations shall 
be close hauled to minimize the effect of ship motion on water level 
indication. When water columns are provided they shall be fitted 
directly to the heads or shells of boilers or drums by 1 inch minimum 
size pipes with shutoff valves attached directly to the boiler or drums, 
or if necessary, connected thereto by a distance piece both at the top 
and bottom of the water columns. Shutoff valves used in the pipe 
connections between the boiler and water column or between the boiler 
and the shutoff valves required by PG-60.6 of the ASME Code for gage 
glasses, shall be locked or sealed open. Water column piping shall not 
be fitted inside the uptake, the smoke box, or the casing. Water columns 
shall be fitted with suitable drains. Cast iron fittings are not 
permitted.
    (d) Gage glass connections (modifies PG-60.3). Gage glasses and gage 
cocks shall be connected directly to the head or shell of a boiler as 
indicated in paragraph (b)(1) of this section. When water columns are 
authorized, connections to the columns may be made provided a close 
hauled arrangement is utilized so that the effect of ship roll on the 
water level indication is minimized.
    (e) Gage cocks (modifies PG-60.4). (1) When the steam pressure does 
not exceed 250 pounds per square inch, three test cocks attached 
directly to the head or shell of a boiler may serve as the secondary 
water level indicator.
    (2) See paragraph (d) of this section for restrictions on cock 
connections.
    (f) Pressure gages (modifies PG-60.6). Each double-ended boiler 
shall be fitted with two steam gages, one on either end on the boiler.
    (g) Salinometer cocks. In vessels operating in salt water, each 
boiler shall be equipped with a salinometer cock or valve which shall be 
fitted directly to the boiler in a convenient position. They shall not 
be attached to the water gage or water column.
    (h) High-water-level alarm. Each watertube boiler for propulsion 
must have an audible and a visible high-water-level alarm. The alarm 
indicators must be located where the boiler is controlled.

[CG FR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9433, Mar. 8, 1985; CGD 83-043, 60 FR 24772, May 10, 1995]



Sec. 52.01-115  Feedwater supply (modifies PG-61).

    Boiler feedwater supply must meet the requirements of PG-61 of the 
ASME Code and Sec. 56.50-30 of this subchapter.

[CGD 81-79, 50 FR 9433, Mar. 8, 1985]



Sec. 52.01-120  Safety valves and safety relief valves (modifies PG-67 through PG-73).

    (a)(1) Boiler safety valves and safety relief valves must be as 
indicated in

[[Page 119]]

PG-67 through PG-73 of the ASME Code except as noted otherwise in this 
section.
    (2) A safety valve must:
    (i) Be stamped in accordance with PG-110 of the ASME Code;
    (ii) Have its capacity certified by the National Board of Boiler and 
Pressure Vessel Inspectors;
    (iii) Have a drain opening tapped for not less than 6mm (\1/4\ in.) 
NPS; and
    (iv) Not have threaded inlets for valves larger than 51mm (2 in.) 
NPS.
    (3) On river steam vessels whose boilers are connected in batteries 
without means of isolating one boiler from another, each battery of 
boilers shall be treated as a single boiler and equipped with not less 
than two safety valves of equal size.
    (4) (Modifies PG-70.) The total rated relieving capacity of drum and 
superheater safety valves as certified by the valve manufacturer shall 
not be less than the maximum generating capacity of the boiler which 
shall be determined and certified by the boiler manufacturer. This 
capacity shall be in compliance with PG-70 of the ASME Code.
    (5) In the event the maximum steam generating capacity of the boiler 
is increased by any means, the relieving capacity of the safety valves 
shall be checked by an inspector, and, if determined to be necessary, 
valves of increased relieving capacity shall be installed.
    (6) (Modifies PG-67). Drum safety valves shall be set to relieve at 
a pressure not in excess of that allowed by the Certificate of 
Inspection. Where for any reason this is lower than the pressure for 
which the boiler was orginially designed and the revised safety valve 
capacity cannot be recomputed and certified by the valve manufacturer, 
one of the tests described in PG-70(3) of the ASME Code shall be 
conducted in the presence of the Inspector to insure that the relieving 
capacity is sufficient at the lower pressure.
    (7) On new installations the safety valve nominal size for 
propulsion boilers and superheaters must not be less than 38mm (1\1/2\ 
in.) nor more than 102mm (4 in.). Safety valves 38mm (1\1/2\ in.) to 
114mm (4\1/2\ in.) may be used for replacements on existing boilers. The 
safety valve size for auxiliary boilers must be between 19mm (\3/4\ in.) 
and 102mm (4 in.) NPS. The nominal size of a safety valve is the nominal 
diameter (as defined in 56.07-5(b)) of the inlet opening.
    (8) Lever or weighted safety valves now installed may be continued 
in use and may be repaired, but when renewals are necessary, lever or 
weighted safety valves shall not be used. All such replacements shall 
conform to the requirements of this section.
    (9) Gags or clamps for holding the safety valve disk on its seat 
shall be carried on board the vessel at all times.
    (10) (Modifies PG-73.2). Cast iron may be used only for caps and 
lifting bars. When used for these parts, the elongation must be at least 
5 percent in 51mm (2 inch) gage length. Nonmetallic material may be used 
only for gaskets and packing.
    (b)(1) (Modifies PG-68.) Superheater safety valves shall be as 
indicated in PG-68 of the ASME Code except as noted otherwise in this 
paragraph.
    (2) The setting of the superheater safety valve shall not exceed the 
design pressure of the superheater outlet flange or the main steam 
piping beyond the superheater. To prevent damage to the superheater, the 
drum safety valve shall be set at a pressure not less than that of the 
superheater safety valve setting plus 5 pounds minimum plus 
approximately the normal load pressure drop through the superheater and 
associated piping, including the controlled desuperheater if fitted. See 
also Sec. 52.01-95(b) (1).
    (3) Drum pilot actuated superheater safety valves are permitted 
provided the setting of the pilot valve and superheater safety valve is 
such that the superheater safety valve will open before the drum safety 
valve.
    (c)(1) (Modifies PG-71.) Safety valves shall be installed as 
indicated in PG-71 of the ASME Code except as noted otherwise in this 
paragraph.
    (2) The final setting of boiler safety valves shall be checked and 
adjusted under steam pressure and, if possible, while the boiler is on 
the line and the steam is at operating temperatures, in the presence of 
and to the satisfaction of a marine inspector who, upon acceptance, 
shall seal the valves. This

[[Page 120]]

regulation applies to both drum and superheater safety valves of all 
boilers.
    (3) The safety valve body drains required by PG-71 of the ASME Code 
shall be run as directly as possible from the body of each boiler safety 
valve, or the drain from each boiler safety valve may be led to an 
independent header common only to boiler safety valve drains. No valves 
of any type shall be installed in the leakoff from drains or drain 
headers and they shall be led to suitable locations to avoid hazard to 
personnel.
    (d)(1) (Modifies PG-72.) The operation of safety valves shall be as 
indicated in PG-72 of the ASME Code except as noted in paragraph (d)(2) 
of this section.
    (2) (Modifies PG-73). The lifting device required by PG-73.1.3 of 
the ASME Code shall be fitted with suitable relieving gear so arranged 
that the controls may be operated from the fireroom or engineroom floor.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9433, Mar. 8, 1985]



Sec. 52.01-130   Installation.

    (a) Foundations. (1) Plans showing details of proposed foundations 
and support for boilers and the proposed means of bracing boilers in the 
vessel shall be submitted for approval to the Officer in Charge, Marine 
Inspection, in the district where the installation is being made.
    (2) Provision shall be made in foundations for expansion of the 
boilers when heated.
    (3) Boilers shall be provided with chocks to prevent movement in the 
event of collision unless a bolted or riveted construction 
satisfactorily provides for this contingency.
    (b) Protection of adjacent structure. (1) Boilers shall be so placed 
that all parts are readily accessible for inspection and repair.
    (2) In vessels having a double bottom or other extensive surfaces 
directly below the boiler, the distance between such surface and a 
boiler shall in no case be less than 18 inches at the lowest part.
    (3) In certain types of vessels where the boiler foundation forms 
the ashpit, such foundations shall be efficiently ventilated, except in 
cases where the ashpit is partially filled with water at all times.
    (4) The pans of oil-burning, watertube boilers shall be arranged to 
prevent oil from leaking into the bilges and shall be lined with 
firebrick or other heat resisting material.
    (5) The distance between a boiler and a compartment containing fuel 
oil shall not be less than 24 inches at the back end of a boiler and 18 
inches elsewhere, except that for a cylindrical part of a boiler or a 
knuckle in the casing of a water-tube boiler, these distances may be 
reduced to 18 inches, provided all parts are readily accessible for 
inspection and repair.
    (6) All oil-burning boilers shall be provided with oiltight drip 
pans under the burners and elsewhere as necessary to prevent oil 
draining into the bilges.
    (c) Boiler uptakes. (1) Where dampers are installed in the uptakes 
or funnels, the arrangement shall be such that it will not be possible 
to shut off the gas passages from the operating boilers.
    (2) Each main power boiler and auxiliary boiler shall be fitted with 
a separate gas passage.



Sec. 52.01-135  Inspection and tests (modifies PG-90 through PG-100).

    (a) Requirements. Inspection and test of boilers and boiler pressure 
parts shall be as indicated in PG-90 through PG-100 of the ASME Code 
except as noted otherwise in this section.
    (b) The inspections required by PG-90 through PG-100 of the ASME 
Code shall be performed by the ``Authorized Inspector'' as defined in 
PG-91 of the ASME Code. The Authorized Inspector shall hold a valid 
commission issued by the National Board of Boiler and Pressure Vessel 
Inspectors. After installation, boilers will be inspected for compliance 
with this part by the ``Marine Inspector'' as defined in Sec. 50.10-15 
of this subchapter.
    (c) Hydrostatic test (modifies PG-99). Each new boiler shall be 
hydrostatically tested after installation to 1\1/2\ times the maximum 
allowable working pressure as indicated in PG-99 of the ASME Code. 
Before the boilers are insulated, accessible parts of the boiler shall 
be emptied, opened up and all interior surfaces shall be examined by the 
marine

[[Page 121]]

inspector to ascertain that no defects have occurred due to the 
hydrostatic test.
    (d) Operating tests. In addition to hydrostatic tests prescribed in 
paragraph (c) of this section, automatically controlled auxiliary 
boilers must be subjected to operating tests as specified in 
Secs. 61.30-20, 61.35-1, 61.35-3, 62.30-10, 63.15-9, 63.25-3, and 63.25-
5 of this chapter, as appropriate, or as directed by the Officer in 
Charge, Marine Inspection, for propulsion boilers, These tests are to be 
performed after final installation.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9976, June 17, 1970; CGD 81-79, 50 FR 9433, Mar. 8, 1985; CGD 88-057, 
55 FR 24236, June 15, 1990]



Sec. 52.01-140  Certification by stamping (modifies PG-104 through PG-113).

    (a) All boilers built in accordance with this part must be stamped 
with the appropriate ASME Code symbol as required by PG-104 through PG-
113 of the ASME Code.
    (b)(1) Upon satisfactory completion of the tests and Coast Guard 
inspections, boilers must be stamped with the following:
    (i) Manufacturer's name and serial number;
    (ii) ASME Code Symbol;
    (iii) Coast Guard symbol, which is affixed only by marine inspector 
(see Sec. 50.10-15 of this subchapter);
    (iv) Maximum allowable working pressure ------ at ------  deg.C 
( deg.F): and
    (v) Boiler rated steaming capacity in kilograms (pounds) per hour 
(rated joules (B.T.U.) per hour output for high temperature water 
boilers).
    (2) The information required in paragraph (b)(1) of this section 
must be located on:
    (i) The front head or shell near the normal waterline and within 610 
mm (24 inches) of the front of firetube boilers; and
    (ii) The drum head of water tube boilers.
    (3) Those heating boilers which are built to section I of the ASME 
Code, as permitted by Sec. 53.01-10(e) of this subchapter, do not 
require Coast Guard stamping and must receive full ASME stamping 
including the appropriate code symbol.
    (c) The data shall be legibly stamped and shall not be obliterated 
during the life of the boiler. In the event that the portion of the 
boiler upon which the data is stamped is to be insulated or otherwise 
covered, a metal nameplate as described in PG-106.6 of the ASME Code 
shall be furnished and mounted. The nameplate is to be maintained in a 
legible condition so that the data may be easily read.
    (d) Safety valves shall be stamped as indicated in PG-110 of the 
ASME Code.

[CGD 81-79, 50 FR 9433, Mar. 8, 1985]



Sec. 52.01-145  Manufacturers' data report forms (modifies PG-112 and PG-113).

    The manufacturers' data report forms required by PG-112 and PG-113 
of the ASME Code must be made available to the marine inspector for 
review. The Authorized Inspector's National Board commission number must 
be included on the manufacturers's data report forms.

[CGD 81-79, 50 FR 9434, Mar. 8, 1985]



      Subpart 52.05--Requirements for Boilers Fabricated by Welding



Sec. 52.05-1   General (modifies PW-1    through PW-54).

    (a) Boilers and component parts, including piping, that are 
fabricated by welding shall be as indicated in PW-1 through PW-54 of the 
ASME Code except as noted otherwise in this subpart.



Sec. 52.05-15   Heat treatment (modifies  PW-10).

    (a) Vessels and vessel parts shall be preheated and postweld heat 
treated in accordance with PW-38 and PW-39 of the ASME Code (reproduces 
PW-10). This includes boiler parts made of pipe material even though 
they may be nondestructively examined under Sec. 52.05-20.



Sec. 52.05-20  Radiographic and ultrasonic examination (modifies PW-11 and PW-41.1).

    Radiographic and ultrasonic examination of welded joints shall be as 
described in PW-11 of the ASME Code except that parts of boilers 
fabricated of pipe material, such as drums, shells,

[[Page 122]]

downcomers. risers, cross pipes, headers and tubes containing only 
circumferentially welded butt joints, shall be nondestructively examined 
as required by Sec. 56.95-10 of this subchapter even though they may be 
exempted by the size limitations specified in PW-11.1.2 and PW-41.1 of 
the ASME Code.

[CGD 81-79, 50 FR 9434, Mar. 8, 1985]



Sec. 52.05-30   Minimum requirements for attachment welds (modifies PW-16).

    (a) The location and minimum size of attachment welds for nozzles 
and other connections shall be as required by PW-16 of the ASME Code 
except as noted otherwise in this section.
    (b) When nozzles or couplings are attached to boilers, as shown in 
Figure PW-16 (a) and (c) of the ASME Code and are welded from one side 
only, backing strips shall be used unless it can be determined visually 
or by acceptable nondestructive test methods that complete penetration 
has been obtained.
    (c) When attachments as shown in Figure PW-16 (y) and (z) of the 
ASME Code are employed they shall be limited to 2-inch pipe size for 
pressure exceeding 150 pounds per square inch.



Sec. 52.05-45   Circumferential joints in pipes, tubes and headers (modifies PW-41).

    (a) Circumferential welded joints of pipes, tubes and headers shall 
be as required by PW-41 of the ASME Code except as noted otherwise in 
this section.
    (b) (Modifies PW-41.1) Circumferential welded joints in pipes, 
tubes, and headers of pipe material must be nondestructively examined as 
required by Sec. 56.95-10 of this subchapter and PW-41 of the ASME Code.
    (c) (Modifies PW-41.5) Butt welded connections shall be provided 
whenever radiography is required by Sec. 56.95-10 of this subchapter for 
the piping system in which the connection is to be made. When 
radiography is not required, welded socket or sleeve type joints meeting 
the requirements of PW-41.5 of the ASME Code may be provided.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9434, Mar. 8, 1985]



            Subpart 52.15--Requirements for Watertube Boilers



Sec. 52.15-1  General (modifies PWT-1  through PWT-15).

    Watertube boilers and parts thereof shall be as indicated in PWT-1 
through PWT-15 of the ASME Code except as noted otherwise in this 
subpart.

[CGD 81-79, 50 FR 9434, Mar. 8, 1985]



Sec. 52.15-5   Tube connections (modifies PWT-9 and PWT-11).

    (a) Tubes, pipe and nipples shall be attached to sheets, heads, 
headers, and fittings as indicated in PWT-11 of the ASME Code except as 
noted otherwise in this section.
    (b) (Replaces PWT-9.2 and PWT-11.3.) Threaded boiler tubes shall not 
be permitted as described by PWT-9.2 and PWT-11.3 of the ASME Code.
    (c) In welded wall construction employing stub and welded wall 
panels which are field welded, approximately 10 percent of the field 
welds shall be checked using any acceptable nondestructive test method.
    (d) Nondestructive testing of the butt welded joints shall meet the 
requirements of Sec. 56.95-10 of this subchapter.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9976, June 17, 1970; CGD 81-79, 50 FR 9434, Mar. 8, 1985]



            Subpart 52.20--Requirements for Firetube Boilers



Sec. 52.20-1   General (modifies PFT-1   through PFT-49).

    (a) Firetube boilers and parts thereof shall be as indicated in PFT-
1 through PFT-49 of the ASME Code except as noted otherwise in this 
subpart.



Sec. 52.20-17  Opening between boiler and safety valve (modifies PFT-44).

    When a discharge pipe is used, it must be installed in accordance 
with the requirements of Sec. 52.01-105.

[CGD 81-79, 50 FR 9434, Mar. 8, 1985]



Sec. 52.20-25   Setting (modifies PFT-46).

    (a) The method of supporting firetube boilers shall be as indicated 
in PFT-46 of the ASME Code except as noted otherwise in this section.

[[Page 123]]

    (b) The foundations shall meet the requirements of Sec. 52.01-130.



                    Subpart 52.25--Other Boiler Types

    Source: CGD 81-79, 50 FR 9434, Mar. 8, 1985, unless otherwise noted.



Sec. 52.25-1  General.

    Requirements for fired boilers of various sizes and uses are 
referenced in Table 54.01-5(a) of this subchapter.



Sec. 52.25-3  Feedwater heaters (modifies PFH-1).

    In addition to the requirements in PFH-1 of the ASME Code, feedwater 
heaters must meet the requirements in this part or the requirements in 
part 54.



Sec. 52.25-5  Miniature boilers (modifies PMB-1 through PMB-21).

    Miniature boilers must meet the applicable provisions in this part 
for the boiler type involved and the mandatory requirements in PMB-1 
through PMB-21 of the ASME Code.



Sec. 52.25-7  Electric boiler (modifies PEB-1 through PEB-19).

    Electric boilers required to comply with this part must meet the 
applicable provisions in this part and the mandatory requirements in 
PEB-1 through PEB-19 except PEB-3 of the ASME Code.



Sec. 52.25-10  Organic fluid vaporizer generators (modifies PVG-1 through PVG-12).

    (a) Organic fluid vaporizer generators and parts thereof shall meet 
the requirements of PVG-1 through PVG-12 of the ASME Code except as 
noted otherwise in this section.
    (b) The application and end use of organic fluid vaporizer 
generators shall be approved by the Commandant.



Sec. 52.25-15  Fired thermal fluid heaters.

    (a) Fired thermal fluid heaters shall be designed, constructed, 
inspected, tested, and stamped in accordance with the applicable 
provisions in this part.
    (b) Each fired thermal fluid heater must be fitted with a control 
which prevents the heat transfer fluid from being heated above its flash 
point.
    (c) The heat transfer fluid must be chemically compatible with any 
cargo carried in the cargo tanks serviced by the heat transfer system.
    (d) Each fired thermal fluid heater must be tested and inspected in 
accordance with the requirements of subpart 61.30 of this chapter.

[CGFR 68-82, 33 FR 18815, Dec. 18, 1968, as amended by CGD 88-057, 55 FR 
24236, June 15, 1990]



Sec. 52.25-20  Exhaust gas boilers.

    Exhaust gas boilers with a maximum allowable working pressure 
greater than 103 kPa gage (15 psig) or an operating temperature greater 
than 454  deg.C. (850  deg.F.) must be designed, constructed, inspected, 
tested and stamped in accordance with the applicable provisions in this 
part. The design temperature of parts exposed to the exhaust gas must be 
the maximum temperature that could normally be produced by the source of 
the exhaust gas. This temperature must be verified by testing or by the 
manufacturer of the engine or other equipment producing the exhaust. 
Automatic exhaust gas boiler control systems must be designed, 
constructed, tested, and inspected in accordance with Sec. 63.25-7 of 
this chapter.

[CGD 88-057, 55 FR 24236, June 15, 1990]



PART 53--HEATING BOILERS--Table of Contents




                   Subpart 53.01--General Requirements

Sec.
53.01-1  Incorporation by reference.
53.01-3  Adoption of section IV of the ASME Code.
53.01-5  Scope (modifies HG-100).
53.01-10  Service restrictions and exceptions (replaces HG-101).

          Subpart 53.05--Pressure Relieving Devices (Article 4)

53.05-1  Safety valve requirements for steam boilers (modifies HG-400 
          and HG-401).
53.05-2  Relief valve requirements for hot water boilers (modifies HG-
          400.2).
53.05-3  Materials (modifies HG-401.2).
53.05-5  Discharge capacities and valve markings.

  Subpart 53.10--Tests, Inspection, Stamping, and Reporting (Article 5)

53.10-1  General.

[[Page 124]]

53.10-3  Inspection and tests (modifies HG-500 through HG-540).
53.10-10  Certification by stamping.
53.10-15  Manufacturers' data report forms.

           Subpart 53.12--Instruments, Fittings, and Controls

53.12-1  General (modifies HG-600 through HG-640).

    Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18826, Dec. 18, 1968, unless otherwise 
noted.



                   Subpart 53.01--General Requirements



Sec. 53.01-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

             American Society of Mechanical Engineers (ASME)

United Engineering Center, 345 East 47th Street, New York, NY 10017
Boiler and Pressure Vessel Code, Section IV, Heating Boilers, July 1989 
with 1989 addenda..........53.01-5; 53.01-10; 53.05-1; 53.05-3; 53.05-5; 
                           53.10-1; 53.10-3; 53.10-10; 53.10-15; 53.12-1

[CGD 88-032, 56 FR 35821, July 29, 1991, as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; CGD 96-041, 61 FR 50727, Sept. 27, 1996]



Sec. 53.01-3   Adoption of section IV of the ASME Code.

    (a) Heating boilers shall be designed, constructed, inspected, 
tested, and stamped in accordance with section IV of the ASME (American 
Society of Mechanical Engineers) Code as limited, modified, or replaced 
by specific requirements in this part. The provisions in the appendices 
to section IV of the ASME Code are adopted and shall be followed when 
the requirements in section IV make them mandatory. For general 
information Table 53.01-1(a) lists the various paragraphs in section IV 
of the ASME Code which are limited, modified, or replaced by regulations 
in this part.

   Table 53.01-1(a)--Limitations and Modifications in the Adoption of   
                       Section IV of the ASME Code                      
------------------------------------------------------------------------
  Paragraphs in section IV, ASME Code\1\                                
             and disposition                     Unit of this part      
------------------------------------------------------------------------
HG-100 modified by.......................  53.01-5(b)                   
HG-101 replaced by.......................  53.01-10                     
HG-400 modified by.......................  53.05-1                      
HG-400.2 modified by.....................  53.05-2                      
HG-401 modified by.......................  53.05-1                      
HG-401.2 modified by.....................  53.05-3                      
HG-500 through HG-540 modified by........  53.10-3                      
HG-600 through HG-640 modified by........  53.12-1                      
------------------------------------------------------------------------
\1\The references to specific provisions in the ASME Code are coded. The
  first letter ``H'' refers to section IV. The letter following ``H''   
  refers to a part or subpart in section IV. The number following the   
  letters refers to the paragraph so numbered in the text of the part or
  subpart in section IV.                                                

    (b) References to the ASME Code, such as paragraph HG-307, indicate:

H=Section IV, Heating Boilers, ASME Code.
G=Part containing general requirements.
3=Article in part.
307=Paragraph within Article 3.

    (c) When a paragraph or a section of the regulations in this part 
relates to material in section IV of the ASME Code, the relationship 
with the code will be shown immediately following the heading of the 
section or at the beginning of the paragraph as follows:
    (1) (Modifies H------.) This indicates that the material in H------ 
is generally applicable but is being altered, amplified or augmented.
    (2) (Replaces H------.) This indicates that H------ does not apply.
    (3) (Reproduces H------.) This indicates that H------ is being 
identically reproduced for convenience, not for emphasis.

[CGFR 68-82, 33 FR 18826, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9976, June 17, 1970; CGD 81-79, 50 FR 9435, Mar. 8, 1985. 
Redesignated and amended by CGD 88-032, 56 FR 35821, July 29, 1991]

[[Page 125]]



Sec. 53.01-5   Scope (modifies HG-100).

    (a) The regulations in this part apply to steam heating boilers, hot 
water boilers (which include hot water heating boilers and hot water 
supply boilers), and to appurtenances thereto. The requirements in this 
part shall be used in conjunction with section IV of the ASME Code. 
Table 54.01-5(a) of this subchapter gives a breakdown by parts in this 
subchapter of the regulations governing various types of pressure 
vessels and boilers.
    (b) (Modifies HG-100.) The requirements of Part HG of section IV, 
Heating Boilers, of the ASME Code shall be used except as noted 
otherwise in this part.

[CGFR 68-82, 33 FR 18826, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9435, Mar. 8, 1985]



Sec. 53.01-10   Service restrictions and exceptions (replaces HG-101).

    (a) General. The service restrictions and exceptions shall be as 
indicated in this section in lieu of the requirements in HG-101 of the 
ASME Code.
    (b) Service restrictions. (1) Boilers of wrought materials shall be 
restricted to a maximum of 103 kPa gage (15 psig) for steam and a 
maximum of 689 kPa (100 psig) or 121 deg.C (250 deg.F) for hot water. If 
operating conditions exceed these limits, design and fabrications shall 
be in accordance with part 52 of this subchapter.
    (2) Boilers of cast iron materials shall be restricted to a maximum 
of 103 kPa gage (15 psig) for steam and to a maximum of 206 kPa gage (30 
psig) or 121 deg.C (250 deg.F) for hot water.
    (c) Hot water supply boilers. (1) Electrically fired hot water 
supply boilers which have a capacity not greater than 454 liters (120 
gallons), a heat input not greater than 58.6 kilowatts (200,000 B.t.u. 
per hour), and are listed as approved under Underwriters' Laboratories 
Standard 174 or 1453 are exempted from the requirements of this part 
provided they are protected by a pressure relief device. This relief 
device need not comply with Sec. 53.05-2.
    (2) Oil fired hot water supply boilers shall not be exempted from 
the requirements of this part on the basis of size or heat input.
    (d) Exhaust gas type boilers shall be restricted to a working 
pressure equal to or less than 103 kPa gage (15 psig) and an operating 
temperature equal to or less than 454 deg.C (850 deg.F). The design 
temperature of parts exposed to the exhaust gas must be the maximum 
temperature that could normally be produced by the source of exhaust 
gas. This temperature shall be verified by testing or by the 
manufacturer of the engine or other equipment producing the exhaust.
    (e) Heating boilers whose operating conditions are within the 
service restrictions of Sec. 53.01-10(b)(1) may be constructed in 
accordance with section I of the ASME Code. In addition, these heating 
boilers must:
    (1) Be stamped with the appropriate ASME Code symbol in accordance 
with PG-104 through PG-113 of the ASME Code;
    (2) Meet the service restrictions of Sec. 53.01-10(b)(2) if made of 
cast iron;
    (3) Have safety valves which meet the requirements of Sec. 52.01-120 
of this subchapter;
    (4) If a hot water supply boiler, have a temperature relief valve or 
a pressure-temperature relief valve in accordance with Sec. 53.05-2(c);
    (5) If automatically controlled, meet the applicable requirements in 
part 63 of this subchapter; and
    (6) Meet the inspection and test requirements of Sec. 53.10-3.
    (f) Controls and miscellaneous accessories. Refer to part 63 of this 
subchapter for the requirements governing controls and miscellaneous 
accessories.

[CGFR 68-82, 33 FR 18826, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9435, Mar. 8, 1985]



          Subpart 53.05--Pressure Relieving Devices (Article 4)

    Source: CGD 81-79, 50 FR 9435, Mar. 8, 1985, unless otherwise noted.



Sec. 53.05-1  Safety valve requirements for steam boilers (modifies HG-400 and HG-401).

    (a) The pressure relief valve requirements and the safety valve 
requirements for steam boilers must be as indicated in HG-400 and HG-401 
except as noted otherwise in this section.

[[Page 126]]

    (b) Each steam boiler must have at least one safety valve.



Sec. 53.05-2  Relief valve requirements for hot water boilers (modifies HG-400.2).

    (a) The relief valve requirements for hot water boilers must be as 
indicated in article 4 of section IV of the ASME Code except as noted 
otherwise in this section.
    (b) Hot water heating boilers. Each hot water heating boiler must 
have at least one safety relief valve.
    (c) Hot water supply boilers. Each hot water supply boiler must have 
at least one safety relief valve and a temperature relief valve or a 
pressure-temperature relief valve. The valve temperature setting must 
not be more than 99 deg.C (210 deg.F).



Sec. 53.05-3  Materials (modifies HG-   401.2).

    (a) Materials for valves must be in accordance with HG-401.2 of the 
ASME Code except nonmetallic materials may be used only for gaskets and 
packing.



Sec. 53.05-5  Discharge capacities and  valve markings.

    (a) The discharge capacities and valve markings must be as indicated 
in HG-402 of the ASME Code. The discharge capacities must be certified 
by the National Board of Boiler and Pressure Vessel Inspectors.



  Subpart 53.10--Tests, Inspection, Stamping, and Reporting (Article 5)



Sec. 53.10-1   General.

    (a) The tests, inspection, stamping, and reporting of heating 
boilers shall be as indicated in Article 5, Part HG of section IV of the 
ASME Code except as noted otherwise in this subpart.



Sec. 53.10-3  Inspection and tests (modifies HG-500 through HG-540).

    (a) The inspections required by HG-500 through HG-540 must be 
performed by the ``Authorized Inspector'' as defined in HG-575 of the 
ASME Code. The Authorized Inspector shall hold a valid commission issued 
by the National Board of Boiler and Pressure Vessel Inspectors. After 
installation, heating boilers must be inspected for compliance with this 
part by a marine inspector.
    (b) Automatically controlled boilers must be subjected to the 
operating tests prescribed in part 63 of this subchapter.
    (c) All heating boilers must have the operation of their pressure 
relieving devices checked after the final installation.

[CGD 81-79, 50 FR 9436, Mar. 8, 1985]



Sec. 53.10-10  Certification by stamping.

    Stamping of heating boilers shall be as indicated in HG-530 of the 
ASME Code.

[CGD 81-79, 50 FR 9436, Mar. 8, 1985]



Sec. 53.10-15  Manufacturers' data report forms.

    The manufacturers' data report forms required by HG-520 of the ASME 
Code must be made available to the marine inspector for review. The 
Authorized Inspector's National Board commission number must be included 
on the manufacturers' data report forms.

[CGD 81-79, 50 FR 9436, Mar. 8, 1985]



           Subpart 53.12--Instruments, Fittings, and Controls



Sec. 53.12-1   General (modifies HG-600 through HG-640).

    (a) The instruments, fittings and controls for heating boilers shall 
be as indicated in HG-600 through HG-640 of section IV of the ASME Code 
except as noted otherwise in this section.
    (b) For control systems for automatic auxiliary heating equipment, 
the requirements in part 63 of this subchapter govern and shall be 
followed.



PART 54--PRESSURE VESSELS--Table of Contents




                   Subpart 54.01--General Requirements

Sec.
54.01-1  Incorporation by reference
54.01-2  Adoption of division 1 of section VIII of the ASME Code.
54.01-5  Scope (modifies U-1 and U-2).
54.01-10  Steam generating pressure vessels (modifies U-1(e)).

[[Page 127]]

54.01-15  Exemptions from shop inspection and plan approval (replaces U-
          1(c) (6) through (9)).
54.01-17  Pressure vessel for human occupancy (PVHO).
54.01-18  Plan approval.
54.01-25  Miscellaneous pressure components (modifies UG-11).
54.01-30  Loadings (modifies UG-22).
54.01-35  Corrosion (modifies UG-25).
54.01-40  External pressure (modifies UG- 28).

                Subpart 54.03--Low Temperature Operation

54.03-1  Scope.
54.03-5  General.

                     Subpart 54.05--Toughness Tests

54.05-1  Scope (replaces UG-84).
54.05-3  Tests required.
54.05-5  Toughness test specimens.
54.05-6  Toughness test temperatures.
54.05-10  Certification of material toughness tests.
54.05-15  Weldment toughness tests--procedure qualifications.
54.05-16  Production toughness testing.
54.05-17  Weld toughness test acceptance criteria.
54.05-20  Impact test properties for service of 0 deg. F. and below.
54.05-25  [Reserved]
54.05-30  Allowable stress values at low temperatures.

            Subpart 54.10--Inspection, Reports, and Stamping

54.10-1  Scope (modifies UG-90 through UG-103 and UG-115 through UG-
          120).
54.10-3  Marine inspectors (replaces UG-90 and UG-91, and modifies UG-92 
          through UG-103).
54.10-5  Maximum allowable working pressure (reproduces UG-98).
54.10-10  Standard hydrostatic test (modifies UG-99).
54.10-15  Pneumatic test (modifies UG-100).
54.10-20  Marking and stamping.
54.10-25  Manufacturers' data report forms (modifies UG-120).

                 Subpart 54.15--Pressure-Relief Devices

54.15-1  General (modifies UG-125 through UG-136).
54.15-3  Definitions (modifies UA-60).
54.15-5  Protective devices (modifies UG- 125).
54.15-10  Safety and relief valves (modifies UG-126).
54.15-13  Rupture disks (modifies UG-127).
54.15-15  Relief devices for unfired steam boilers, evaporators, and 
          heat exchangers (modifies UG-126).
54.15-25  Minimum relief capacities for cargo tanks containing 
          compressed or liquefied gas.

                  Subpart 54.20--Fabrication by Welding

54.20-1  Scope (modifies UW-1 through UW-65).
54.20-2  Fabrication for hazardous materials (replaces UW-2(a)).
54.20-3  Design (modifies UW-9, UW-11(a), UW-13, and UW-16).
54.20-5  Welding qualification tests and production testing (modifies 
          UW-26, UW-28, UW-29, UW-47, and UW-48).

                  Subpart 54.23--Fabrication by Brazing

54.23-1  Scope (modifies UB-1).

 Subpart 54.25--Construction With Carbon, Alloy, and Heat Treated Steels

54.25-1  Scope.
54.25-3  Steel plates (modifies UCS-6).
54.25-5  Corrosion allowance (replaces UCS-25).
54.25-7  Requirements for postweld heat treatment (modifies UCS-56).
54.25-8  Radiography (modifies UW-11(a), UCS-57, UNF-57, UHA-33, and 
          UHT-57).
54.25-10  Low temperature operation--ferritic steels (replaces UCS-65 
          through UCS-67).
54.25-15  Low temperature operation--high alloy steels (modifies UHA-
          23(b) and UHA-51).
54.25-20  Low temperature operation--ferritic steels with properties 
          enhanced by heat treatment (modifies UHT-5(c), UHT-6, UHT-23, 
          and UHT-82).
54.25-25  Welding of quenched and tempered steels (modifies UHT-82).

                 Subpart 54.30--Mechanical Stress Relief

54.30-1  Scope.
54.30-3.  Introduction.
54.30-5  Limitations and requirements.
54.30-10  Method of performing mechanical stress relief.
54.30-15  Requirement for analysis and computation.

    Authority: 33 U.S.C. 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; 
E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18828, Dec. 18, 1968, unless otherwise 
noted.

[[Page 128]]



                   Subpart 54.01--General Requirements



Sec. 54.01-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

             American Society of Mechanical Engineers (ASME)

United Engineering Center, 345 East 47th Street, New York, NY 10017
Boiler and Pressure Vessel Code, section VIII, Division 1, Pressure 
Vessels, July 1989 with 1989 addenda.........54.01-2; 54.01-5; 54.01-15; 
        54.01-18; 54.01-25; 54.01-30; 54.01-35; 54.03-1; 54.03-5; 54.05-
             1; 54.10-1; 54.10-3; 54.10-5; 54.10-10; 54.10-15; 54.15-1; 
        54.15-5; 54.15-10; 54.15-13; 54.20-1; 54.20-3; 54.25-1; 54.25-3; 
        54.25-5; 54.25-8; 54.25-10; 54.25-15; 54.25-20; 54.25-25; 54.30-
                                                    3; 54.30-5; 54.30-10

            American Society for Testing and Materials (ASTM)

1916 Race Street, Philadelphia, PA 19103
ASTM A-20, Steel Plates for Pressure Vessels, 1980..............54.25-10
ASTM A-203, Pressure Vessel Plates, Alloy Steel, Nickel, 1980...54.05-20
ASTM A-370, Mechanical Testing of Steel Products, 1977..........54.25-20
ASTM E-23, Notched Bar Impact Testing of Metallic Materials, 1980 
                                                                 54.05-5
ASTM E-208, Conducting Drop-Weight Test to Determine Nil-Ductility 
Transition Temperature of Ferritic Steels, 1969..................54.05-5

                    Compressed Gas Association (CGA)

500 Fifth Avenue, New York, NY 10036
S-1.2, Safety Relief Device Standards--Cargo and Portable Tanks for 
Compressed Gases, 1979..........................................54.15-25
S-1.2.5.2, Flow Test of Safety Relief Valves, 1979..............54.15-10

               Manufacturers Standardization Society (MSS)

127 Park Street, NE. Vienna, VA 22180
SP-25, Standard Marketing System for Valves, Fittings, Flanges and 
Unions, 1978....................................................54.01-25

[CGD 88-032, 56 FR 35822, July 29, 1991 as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; CGD 95-027, 61 FR 26000, May 23, 1996; CGD 96-
041, 61 FR 50727, Sept. 27, 1996]



Sec. 54.01-2   Adoption of division 1 of section VIII of the ASME Code.

    (a) Pressure vessels shall be designed, constructed, and inspected 
in accordance with division 1 of section VIII of the ASME (American 
Society of Mechanical Engineers) Code, as limited, modified, or replaced 
by specific requirements in this part. The provisions in the appendices 
to division 1 of section VIII of the ASME Code are adopted and shall be 
followed when the requirements in section VIII make them mandatory. For 
general information Table 54.01-1(a) lists the various paragraphs in 
division 1 of section VIII of the ASME Code which are limited, modified, 
or replaced by regulations in this part.

   Table 54.01-1(a)--Limitations and Modifications in the Adoption of   
                  Division 1 of Section VIII, ASME Code                 
------------------------------------------------------------------------
 Paragraphs in Section VIII, ASME Code\1\                               
              and disposition                     Unit of this part     
------------------------------------------------------------------------
U-1 and U-2 modified by...................  54.01-5 through 54.01-16.   
U-1(c) replaced by........................  54.01-5.                    
U-1(d) replaced by........................  54.01-5(a) and 54.01-15.    
U-1(e) modified by........................  54.01-10.                   
U-1(h) replaced by........................  54.01-15.                   
UG-11 modified by.........................  54.01-25.                   
UG-22 modified by.........................  54.01-30.                   
UG-25 modified by.........................  54.01-35.                   
UG-28 modified by.........................  54.01-40.                   
UG-84 replaced by.........................  54.05-1.                    
UG-90 through UG-103 modified by..........  54.10-1.                    
UG-90 and UG-91 replaced by...............  54.10-3.                    
UG-92 through UG-103 modified by..........  54.10-3.                    
UG-98 reproduced by.......................  54.10-5.                    
UG-99 modified by.........................  54.10-10.                   
UG-100 modified by........................  54.10-15.                   
UG-115 through UG-120 modified by.........  54.10-1.                    
UG-116, except (k) replaced by............  54.10-20(a).                
UG-116(k) replaced by.....................  54.10-20(b).                
UG-117 replaced by........................  54.10-20(c).                
UG-118 replaced by........................  54.10-20(a).                

[[Page 129]]

                                                                        
UG-119 modified by........................  54.10-20(d).                
UG-120 modified by........................  54.10-25.                   
UG-125 through UG-134 modified by.........  54.15-1 through 54.15-15.   
UG-125 modified by........................  54.15-5.                    
UG-125 modified by........................  54.15-10, 54.15-15.         
UG-127 modified by........................  54.15-13.                   
UW-1 through UW-65 modified by............  54.20-1.                    
UW-2(a) replaced by.......................  54.01-5(b) and 54.20-2.     
UW-2(b) replaced by.......................  54.01-5(b).                 
UW-9, UW-11(a), UW-13, UW-16 modified by..  54.20-3.                    
UW-11(a) modified by......................  54.25-8.                    
UW-26, UW-27, UW-29, UW-47, UW-48 modified  54.20-5.                    
                                 by.                                    
UW-52(c)(3) replaced by...................  54.20-10.                   
UB-1 modified by..........................  54.23-1                     
UB-2 modified by..........................  52.01-95(d) and 56.30-      
                                             30(b)(1).                  
UCS-6 modified by.........................  54.25-3.                    
UCS-25 replaced by........................  54.25-5.                    
UCS-56 modified by........................  54.25-7.                    
 UCS-57, UNF-57, UHA-33, and UHT-57         54.25-8.                    
                        modified by.                                    
UCS-65 through UCS-67 replaced by.........  54.25-10.                   
UHA-23(b) and UHA-51 modified by..........  54.25-15.                   
UHT-5(c), UHT-6, UHT-23 modified by.......  54.25-20.                   
UHT-82 modified by........................  54.25-20, 54.25-25.         
UA-60 modified by.........................  54.15-3.                    
------------------------------------------------------------------------
\1\The references to specific provisions in the ASME Code are coded. The
  first letter ``U'' refers to division 1 of section VIII. The second   
  letter, such as ``G'', refers to a subsection within section VIII. The
  number refers to the paragraph within the subsection.                 

    (b) References to the ASME Code, such as paragraph UG-125, indicate:

U=Division 1 of section VIII, Pressure Vessels, ASME Code.
G=Part containing general requirements.
125=Paragraph within part.

    (c) When a paragraph or a section of the regulations in this part 
relates to material in division 1 of section VIII of the ASME Code, the 
relationship with the code will be shown immediately following the 
heading of the section or at the beginning of the paragraph as follows:
    (1) (Modifies U------.) This indicates that the material in U------ 
is generally applicable but is being altered, amplified or augmented.
    (2) (Replaces U------.) This indicates that U------ does not apply.
    (3) (Reproduces U------.) This indicates that U------ is being 
identically reproduced for convenience, not for emphasis.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9976, June 17, 1970; CGFR 72-59R, 37 FR 6188, Mar. 25, 1972; CGD 72-
206R, 38 FR 17226, June 29, 1973; CGD 73-254, 40 FR 40163, Sept. 2, 
1975; CGD 77-147, 47 FR 21809, May 20, 1982; CGD 85-061, 54 FR 50963, 
Dec. 11, 1989. Redesignated by CGD 88-032, 56 FR 35822, July 29, 1991]



Sec. 54.01-5   Scope (Modifies U-1 and U-2).

    (a) This part contains requirements for pressure vessels. Table 
54.01-5(a) gives a breakdown by parts in this subchapter of the 
regulations governing various types of pressure vessels, boilers, and 
thermal units.
    (b) Pressure vessels are divided into Classes I, I-L (low 
temperature), II, II-L (low temperature), and III. Table 54.01-5(b) 
describes these classes and sets out additional requirements for welded 
pressure vessels.
    (c) The requirements for pressure vessels by class are as follows:
    (1) Class I-L and II-L pressure vessels must meet the applicable 
requirements in this part.
    (2) Pressure vessels containing hazardous materials as defined in 
Sec. 150.115 of this chapter must meet the requirements of this part or, 
as applicable, the requirements in 49 CFR parts 171-177 or part 64 of 
this chapter.
    (3) Except as provided in paragraph (c)(4) of this section, Classes 
I, II, and III pressure vessels not containing hazardous materials must 
be designed and constructed in accordance with the requirements in 
Section VIII, division 1, of the ASME Code and must be stamped with the 
ASME ``U'' symbol. These pressure vessels must also comply with the 
requirements that are listed or prescribed in paragraphs (d) through (g) 
of this section. Compliance with other provisions in this part is not 
required.
    (4) Classes II and III pressure vessels that have a net internal 
volume of less than 0.14 cubic meters (5 cubic feet) and do not contain 
hazardous materials must be stamped with either the ASME ``U'' or ``UM'' 
symbol. Compliance with other provisions in this part is not required.
    (d) Pressure vessels described in paragraph (c)(3) of this section 
must--

[[Page 130]]

    (1) Have detailed plans that include the information required by 
Sec. 54.01-18 (approved by the Office of Management and Budget under OMB 
control number 2130-0181);
    (2) Meet Sec. 54.01.01-35, Sec. 54.20-3(c), and Sec. 54.25-3 of this 
part;
    (3) Have pressure relief devices required by subpart 54.15;
    (4) Meet the applicable requirements in Secs. 54.10-3, 54.10-20, and 
54.10-25 for inspection, reports, and stamping;
    (5) If welded, meet the post weld heat treatment and minimum joint 
and radiography requirement in Table 54.01-5(b); and
    (6) If a steam generating pressure vessel, meet Sec. 54.01-10.
    (e) The plans required by paragraph (d)(1) of this section must be 
certified by a registered professional engineer to meet the design 
requirements in paragraph (d) of this section and in section VIII, 
division 1, of the ASME Code. The certification must appear on all 
drawings and analyses. The plans must be made available to the Coast 
Guard prior to the inspection required by Sec. 54.10-3(c).
    (f) If a pressure vessel has more than one independent chamber and 
the chambers have different classifications, each chamber must, as a 
minimum, meet the requirements for its classification. If a single 
classification for the entire pressure vessel is preferred, the 
classification selected must be one that is required to meet all of the 
regulations applicable to the classification that is not selected. For 
example, if one chamber is Class I and one chamber is Class II-L, the 
only single classification that can be selected is Class I-L.
    (g) The design pressure for each interface between two chambers in a 
multichambered pressure vessel must be--
    (1) The maximum allowable working pressure (gauge) in the chamber 
with the higher pressure; or
    (2) If one chamber is a vacuum chamber, the maximum allowable 
working pressure (absolute) in the other chamber minus the least 
operating pressure (absolute) in the vacuum chamber.

 Table 54.01-5(A).--Regulation Reference for Boilers, Pressure Vessels, 
                            and Thermal Units                           
------------------------------------------------------------------------
                                                  Part of      Part of  
                                                 subchapter   subchapter
  Service and pressure temperature boundaries    regulating   regulating
                                                 mechanical   automatic 
                                                   design      control  
------------------------------------------------------------------------
Main (power) boiler: All......................           52           62
Pressure vessel: All..........................           54           NA
Fired auxiliary boiler \1\ (combustion                                  
 products or electricity):                                              
  (a) Steam:                                                            
    More than 103 kPa (15 psig)...............           52    \2\ 62 or
                                                                      63
    Equal to or less than 103 kPa (15 psig)...           53           63
  (b) Hot water heating:                                                
    More than 689 kPa (100 psig) or 121  deg.C                          
     (250  deg.F).............................           52           63
    Equal to or less than 689 kPa (100 psig)                            
     and 121  deg.C (250  deg.F)..............           53           63
  (c) Hot water supply:                                                 
    More than 689 kPa (100 psig) or 121  deg.C                          
     (250  deg.F).............................           52           63
    Equal to or less than 689 kPa (100 psig)                            
     and 121  deg.C (250  deg.F)..............           53           63
Other:                                                                  
  (a) Fired thermal fluid heaters: All........           52           63
  (b) Unfired steam boiler:                                             
    More than 206 kPa (30 psig) or 454  deg.C                           
     (850  deg.F) \3\.........................           52           NA
    Equal to or less than 206 kPa (30 psig)                             
     and 454  deg.C (850  deg.F)..............           54           NA
  (c) Evaporators and heat exchangers: More                             
   than 103 kPa (15 Sig) \4\..................           54           NA
  (d) Unfired hot water supply or heating                               
   boiler: More than 103 kPa (15 psig) \4\....           54           NA
------------------------------------------------------------------------
\1\ Including exhaust gas types.                                        
\2\ Boilers with heat input ratings >=12,500,000 Btu/hr. must have      
  controls that meet part 62. Boilers with heat input ratings           
  <12,500,000 Btu/hr. must have controls that meet part 63.             
\3\ Temperature of working fluid.                                       
\4\ Relief device is required even if designed for less than 103 kPa (15
  psig).                                                                


[[Page 131]]


                                                  Table 54.01-5(b)--Pressure Vessel Classification \8\                                                  
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                        Radiography                                                     
                                           Class limits on     Joint requirements      requirements,      Post weld heat    Shop inspect.  Plan approval
       Class          Service contents      pressure and             1,6,7          section VIII, ASME  treatment required     required       required  
                                             temperature                                 Code 3,7               5,7                                     
--------------------------------------------------------------------------------------------------------------------------------------------------------
I..................  (a) Vapor or gas..  Over 600 p.s.i. or  (1) For category A;    Full on all butt    For carbon or low   Yes \4\......  Yes \4\.     
                     (b) Liquid........   700 deg.F           (1) or (2) For         joints regardless   alloy steel, in                                
                     (c) Hazardous       Over 600 p.s.i. or   category B. All        of thickness.       accordance with                                
                      materials \2\.      400 deg.F           categories C and D     Exceptions listed   Table UCS-56,                                  
                                                              must have full         in Table UCS-57     regardless of                                  
                                                              penetration welds      of ASME Code do     thickness. For                                 
                                                              extending through      not apply.          other materials,                               
                                                              the entire thickness                       in accordance                                  
                                                              of the vessel wall                         with section                                   
                                                              or nozzle wall.                            VIII, ASME Code.                               
                                                                                                                                                        
I-L Low temperature  (a) Vapor or gas..  Over 250 p.s.i.     (1) for categories A   Full on all butt    For carbon or low   Yes..........  Yes.         
                                          and service         and B. All             joints regardless   alloy steel, in                                
                     (b) Liquid........   temperature below   categories C and D     of thickness.       accordance with                                
                                          0 deg.F             must have full         Exceptions listed   Table UCS-56,                                  
                                         Over 250 p.s.i.      penetration welds      in Table UCS-57     regardless of                                  
                     (c) Hazardous        and service         extending through      of ASME Code do     thickness. For                                 
                      materials \2\       temperature below   the entire thickness   not apply.          other materials,                               
                                          0 deg.F             of the vessel wall                         in accordance                                  
                                                              or nozzle wall. No                         with section                                   
                                                              backing rings or                           VIII, ASME Code.                               
                                                              strips left in place.                                                                     
II.................  (a) Vapor or gas..  30 through 600      (1) or (2) for         Spot, unless        In accordance with  Yes \4\......  Yes \4\.     
                     (b) Liquid........   p.s.i. or 275       category A. (1),       exempted by UW-     section, VIII of                               
                     (c) Hazardous        deg. through 700    (2), or (3) for        11(c) of ASME       ASME Code.                                     
                      materials 2,3,6     deg.F               category B.            Code.                                                              
                                         200 through 600      Categories C and D                                                                        
                                          p.s.i. or 250       in accordance with                                                                        
                                          deg. through 400    UW-16 of ASME Code.                                                                       
                                          deg.F                                                                                                         
                                                                                                                                                        
          II-L Low   (a) Vapor or gas..  0 through 250       (1) for category A;    Spot. The           Same as for I-L     Yes..........  Yes.         
       temperature.  (b) Liquid........   p.s.i. and          (1) or (2) for         exemption of UW-    except that                                    
                     (c) Hazardous        service             category B. All        II(c) of ASME       mechanical stress                              
                      materials \2\       temperature below   categories C and D     Code does not       relief may be                                  
                                          0 deg.F             must have full         apply.              substituted if                                 
                                         0 through 250        penetration welds                          allowed under                                  
                                          p.s.i. and          extending through                          subpart 54.30 of                               
                                          service             the entire thickness                       this chapter.                                  
                                          temperature below   of the vessel wall                                                                        
                                          0 deg.F             or nozzle wall.                                                                           
                                                                                                                                                        
III................  (a) Vapor or gas..  Under 30 p.s.i.     In accordance with     Spot, unless        In accordance with  Yes \4\......  Yes \4\.     
                     (b) Liquid........   and 0 deg.          Section VIII of AMSE   exempted UW-II(c)   Section VIII of                                
                     (c) Hazardous        through 275 deg.F   Code.                  of ASME Code.       ASME Code.                                     
                      materials 2,3,6    Under 200 p.s.i.                                                                                               
                                          and 0 deg.                                                                                                    
                                          through 250 deg.F                                                                                             
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Welded joint categories are defined under UW-3 of the ASME Code. Joint types are described in Table UW-12 of the ASME Code, and numbered ``(1),''   
  ``(2)'', etc.                                                                                                                                         
\2\ See Sec.  54.20-2.                                                                                                                                  
\3\ See Secs.  54.25-8(c) and 54.25-10(d).                                                                                                              
\4\ See Secs.  54.01-15 and 54.10-3 for exemptions.                                                                                                     
\5\ Specific requirements modifying Table UCS-56 of the ASME Code are found in Sec.  54.25-7.                                                           
\6\ See Sec.  54.20-3 (c) and (f)                                                                                                                       
\7\ Applies only to welded pressure vessels.                                                                                                            


(Approved by the Office of Management and Budget under OMB control number 2130-0181)                            
                                                                                                                
[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 FR 9976, June 17, 1970; CGD 77-147, 47   
 FR 21809, May 20, 1982; 55 FR 696, Jan. 8, 1990; CGD 88-057, 55 FR 24236, June 15, 1990; CGD 85-061, 55 FR     
 41917, Oct. 16, 1990; CGD 95-027, 61 FR 26000, May 23, 1996]                                                   
                                                                                                                


[[Page 132]]



Sec. 54.01-10  Steam generating pressure vessels (modifies U-1(e)).

    (a) Pressure vessels in which steam is generated are classed as 
``Unfired Steam Boilers'' except as required otherwise by paragraph (b) 
of this section. Unfired steam boilers must be fitted with an efficient 
water level indicator, a pressure gage, a blowdown valve, and an 
approved safety valve as required by Sec. 54.15-15. Unfired steam 
boilers must be constructed in accordance with this part other than when 
the pressures are more than 206 kPa (30 psig) or the temperatures of the 
working fluid are more than 454  deg.C (850  deg.F) when such boilers 
must be constructed in accordance with part 52 of this subchapter.
    (b) Vessels known as ``Evaporators'' or ``Heat Exchangers'' are not 
classified as unfired steam boilers. They shall be fitted with an 
approved safety device as required under Sec. 54.15-15 and constructed 
in accordance with this part.
    (c) An evaporator in which steam is generated shall be fitted with 
an efficient water level indicator, a pressure gage, and a blowdown 
valve.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9436, Mar. 8, 1985; CGD 95-012, 60 FR 48044, Sept. 18, 1995]



Sec. 54.01-15  Exemptions from shop inspection and plan approval (replaces U-1(c) (6) through (9)).

    (a) The following classifications are exempt from shop inspection 
and plan approval requirements of this part:
    (1) Vessels containing water at a pressure not greater than 100 
pounds per square inch gage, nor a temperature above 200 deg. F., 
including those containing air, the compression of which serves only as 
a cushion. Air charging lines may be permanently attached provided the 
air pressure does not exceed 15 pounds per square inch gage.
    (2) Hot water supply storage tanks heated by steam or any other 
indirect means when none of the following limitations is exceeded:
    (i) A heat input of 200,000 B.t.u. per hour;
    (ii) A water temperature of 200 deg. F.;
    (iii) A nominal water-containing capacity of 120 gallons; or
    (iv) A pressure of 100 pounds per square inch gage.

The exemption of any tank under this subparagraph requires that it shall 
be fitted with a safety relief valve of at least 1-inch diameter, set to 
relieve below the maximum allowable working pressure of the tank.
    (3)(i) Vessels having an internal operating pressure not exceeding 
15 pounds per square inch gage with no limitation on size. (See UG-28(e) 
of the ASME Code.)
    (ii) Cargo tanks of pressure vessel configuration are not included 
in the exemption in paragraph (a)(3)(i) of this section.
    (4) Class I, II, and III pressure vessels that meet the requirements 
of Sec. 54.01-5(c)(3) and (c)(4).
    (5) Condensers and heat exchangers, regardless of size, where the 
design is such that the liquid phase is not greater than 100 pounds per 
square inch gage and 200 deg. F. and the vapor phase is not greater than 
15 pounds per square inch gage provided system over pressure conditions 
are considered.
    (b) For fluid conditioner fittings see Sec. 56.15-1 of this 
subchapter.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970; CGFR 70-143, 35 FR 19906, Dec. 30, 1970; CGD 77-
147, 47 FR 21810, May 20, 1982]



Sec. 54.01-17  Pressure vessel for human occupancy (PVHO).

    Pressure vessels for human occupancy (PVHO's) must meet the 
requirements of subpart B (Commercial Diving Operations) of part 197 of 
this chapter.

[CGD 76-009, 43 FR 53683, Nov. 16, 1978]



Sec. 54.01-18   Plan approval.

    (a) Manufacturers intending to fabricate pressure vessels, heat 
exchangers, evaporators, and similar appurtenances, covered by the 
regulations in this part shall submit detailed plans in accordance with 
subpart 50.20 of this subchapter.
    (b) The following information shall be submitted:
    (1) Calculations for all pressure containment components including 
the maximum allowable working pressure, the hydrostatic or pneumatic 
test pressure, and the intended safety device setting.

[[Page 133]]

    (2) Joint design and methods of attachment of all pressure 
containment components.
    (3) Foundations and supports (design and attachment).
    (4) Pertinent calculations for pressure vessel foundations and/or 
supports.
    (5) A bill of material meeting the requirements of section VIII of 
the ASME Code, as modified by this part.
    (6) A diagrammatic arrangement drawing of the assembled unit 
indicating location of internal and external components.



Sec. 54.01-25   Miscellaneous pressure components (modifies UG-11).

    (a) Pressure components for pressure vessels shall be as required by 
UG-11 of the ASME Code except as noted otherwise in this section.
    (b) All pressure components conforming to an accepted ANSI (American 
National Standards Institute) Standard referred to in an adopted code, 
specification or standard or in this subchapter shall also be marked in 
accordance with MSS (Manufacturers' Standardization Society) Standard 
SP-25.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970]



Sec. 54.01-30   Loadings (modifies UG-22).

    (a) The loadings for pressure vessels shall be as required by UG-22 
of the ASME Code except as noted otherwise in this section.
    (b) In evaluating loadings for certain pressure vessel applications, 
the Commandant may require consideration of the following loads in 
addition to those listed in UG-22 of the ASME Code:
    (1) Loading imposed by vessel's attitude in roll, list, pitch and 
trim.
    (2) Dynamic forces due to ship motions.



Sec. 54.01-35   Corrosion (modifies UG- 25).

    (a) Vessels or portions of vessels subject to corrosion shall be as 
required by UG-25 of the ASME Code except as noted otherwise in this 
section.
    (b) The pressure portions of pressure vessels shall:
    (1) Normally have a corrosion allowance of one-sixth of the 
calculated thickness, or one-sixteenth inch, whichever is smaller, added 
to the calculated thickness as determined by the applicable design 
formula.
    (2) Be specifically evaluated in cases where unusually corrosive 
cargoes will be involved, for the possible increase of this corrosion 
allowance.
    (3) Have no additional thickness required when acceptable corrosion 
resistant materials are used.
    (4) Not normally need additional thickness allowance when the 
effective stress (either S or SE depending on the design formula used) 
is 80 percent or less of the allowable stress listed in section VIII of 
the ASME Code for calculating thickness.
    (c) Telltale holes shall not be permitted in pressure vessels 
containing dangerous fluids, such as acid, poison, corrosives, etc.
    (d) Exemption from these corrosion allowance requirements will be 
granted by the Commandant in those cases where:
    (1) The contents of the pressure vessel is judged to be sufficiently 
noncorrosive; and,
    (2) Where the external surface is also protected from corrosion. A 
suitable vapor barrier is adequate protection, while paint or other thin 
coatings exposed to weather or mechanical damage are not acceptable.

    Note: No applied linings except as provided in Part UCL of the ASME 
Code shall be acceptable.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6189, Mar. 25, 1972]



Sec. 54.01-40   External pressure (modifies UG-28).

    (a) The exemption from external pressure consideration provided by 
the note under UG-28(f) does not apply.
    (b) Vessels which may at times be subjected to partial vacuum due to 
nature of the contents, temperature, unloading operations, or other 
facet of employment shall either have vacuum breaker protection or be 
designed for not less than one-half atmosphere of external pressure.

[CGFR 70-143, 35 FR 19906, Dec. 30, 1970]

[[Page 134]]



                Subpart 54.03--Low Temperature Operation



Sec. 54.03-1   Scope.

    (a) The pressure vessels for low temperature operation shall be as 
required by section VIII of the ASME Code as modified by this subpart.



Sec. 54.03-5   General.

    (a) Requirements for ferritic steels, high alloy steels, and heat 
treated ferritic steels are contained in Secs. 54.25-10, 54.25-15, and 
54.25-20 respectively of this subchapter.
    (b) Requirements for toughness testing of material product forms and 
weldments (including weld procedure qualification and production 
toughness tests) are contained in subpart 54.05.
    (c) Materials suitable for a given minimum service temperature may 
be used in warmer service. Steels differing in chemical composition, 
mechanical properties, or heat treatments from those specified may be 
specially approved by the Commandant. Similarly, aluminum alloys and 
other nonferrous materials not intended to be covered by these sections 
may be specially considered by the Commandant for service at any low 
temperature.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970]



                     Subpart 54.05--Toughness Tests



Sec. 54.05-1  Scope (replaces UG-84).

    (a) The toughness tests of materials used in pressure vessels shall 
be as required by this subpart in lieu of requirements in UG-84 of the 
ASME Code.



Sec. 54.05-3  Tests required.

    (a) Where material or welding toughness tests are required by 
Secs. 54.25-10, 54.25-15, 54.25-20, and subpart 57.03 or 57.06 of this 
subchapter, the following requirements shall apply:
    (1) Additional requirements for ferritic steels with properties 
enhanced by heat treatment are in Sec. 54.25-20.
    (2) Certified reports of toughness tests by the material 
manufacturer will be acceptable evidence provided the specimens taken 
are representative of the material delivered and that the material is 
not subject to treatment during or following fabrication that will 
reduce its impact properties. If such treatment is subsequently applied 
to the material, test specimens shall be so taken and treated as to be 
representative of the material in the finished vessel.
    (b) The requirements of this subpart are also applicable to 
nonpressure vessel type low temperature tanks and associated secondary 
barriers, as defined in Sec. 38.05-4 of subchapter D (Tank Vessels) of 
this chapter.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970]



Sec. 54.05-5   Toughness test specimens.

    (a) Charpy V-notch impact tests. Where required, Charpy V-notch 
tests shall be conducted in accordance with ASTM Specification E-23, 
``Notched Bar Impact Testing of Metallic Materials'', using the Type A 
specimen shown in Figure 4 of the specification. Special attention is 
drawn to the fact that the Charpy Keyhole and U-notch specimens are not 
acceptable substitutes for the Charpy V-notch specimen and shall not be 
used to qualify materials within the scope of this subpart. Each set of 
Charpy impact tests shall consist of three specimens. For materials \1/
2\-inch thick or less, the largest possible Charpy specimens for that 
thickness shall be cut centered at the material's mid-thickness. For 
materials thicker than \1/2\-inch, full size Charpy specimens shall be 
cut centered at a location as near as practicable to a point midway 
between the material's surface and half-thickness. Except where 
otherwise specified, transversely oriented specimens must be used. When 
longitudinal specimens are used, the required energy values may not be 
less than 1.5 times the values required for transversely oriented 
specimens. In all cases the notch shall be cut normal to the material's 
surface. Test specimens shall be taken at least one ``t'' from any heat 
treated edge (where ``t'' is the material's nominal thickness).
    (b) Drop weight tests. Where required, drop weight tests shall be 
conducted for no-break performance in accordance with ASTM Specification 
E-208,

[[Page 135]]

``Conducting Drop-Weight Test to Determine Nil-Ductility Transition 
Temperature of Ferritic Steels''. For material thicknesses between \1/
2\-inch and \5/8\-inch, the ASTM E-208 specimen P-3, machined to \1/2\-
inch thickness, shall be used with a stop distance of 0.090-inch. In 
preparing weld specimens for dropweight testing, weld reinforcement 
shall be ground flush, the hard facing bead centered on and transverse 
to the weld, and the notch centered on and parallel to the weld axis.
    (c) Retest procedures. (1) When Charpy V-notch impact specimens are 
used and the average value of the three initial specimens fails to meet 
the stated requirements by an amount not exceeding 15 percent, or the 
value for more than one specimen is below the required average value of 
when the value for one specimen is below the minimum value permitted for 
a single specimen by an amount not exceeding 15 percent, three 
additional specimens from the same material may be tested and the 
results combined with those previously obtained to form a new average. 
This new average of six specimens must exceed the specified minimum 
average. In the event the Charpy retests fail, the material may still be 
qualified by exhibiting a no-break performance when tested in accordance 
with the drop weight procedure, if applicable. Two drop weight specimens 
shall be tested for each Charpy V-notch set of three initial specimens 
which failed to qualify. Failure of either or both of these drop weight 
specimens will constitute rejection of the material or weldments 
represented, except as outlined in paragraph (c)(3) of this section.
    (2) When drop weight specimens are used, retests shall be permitted 
only within the limits prescribed in ASTM Specification E-208, except as 
outlined in paragraph (c)(3) of this section.
    (3) If, for heat treated base material, the required toughness 
results are not obtained in the initial test or in the retest, the 
material may be reheat treated one time and tested again in accordance 
with the initial requirements for the material.
    (d) Alternate toughness tests. The Charpy V-notch impact values of 
Secs. 54.05-20(a) and 54.05-25(a) are representative of those which 
correlate with the nil-ductility transition temperature determined by 
the drop-weight tests for the steels specified in Sec. 54.25-10. For 
materials for which there are other data showing suitable correlation 
between Charpy V-notch and drop-weight tests, V-notch acceptance limits 
different from those tabulated herein may be specially approved by the 
Commandant, based upon the actual correlation. In the case of steels for 
which the tabulated Charpy V-notch values can be shown to be 
inapplicable or in the case of specially considered steels, or as an 
alternative to complying with the tabulated impact requirements, 
acceptance may be based upon the material exhibiting a no-break 
performance when tested in accordance with the drop-weight procedure. 
Whenever the drop-weight test is used as an alternative to the Charpy V-
notch test, two drop-weight specimens shall be tested for each set of 
three Charpy V-notch specimens otherwise required. If the drop-weight 
test cannot be performed because of material thickness limitations (less 
than one-half inch) or product shape, or is otherwise inapplicable 
(because of heat treatment, chemistry, etc.), other tests and/or test 
criteria will be specified by the Commandant to assure the adequacy of 
the material for the intended application.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40163, Sept. 2, 1975]



Sec. 54.05-6   Toughness Test Temperatures.

    Each toughness test must be conducted at temperatures not warmer 
than -20  deg.F or 10  deg.F below the minimum service temperature, 
whichever is lower, except that for service at or below -320  deg.F, the 
tests may be conducted at the service temperature in accordance with 
Sec. 54.25-10(a)(2).

[CGD 85-061, 54 FR 50964, Dec. 11, 1989]



Sec. 54.05-10   Certification of material toughness tests.

    (a) Plate material. The manufacturer of plates may certify such 
material, provided it has been given an appropriate heat-treatment, by 
reporting the

[[Page 136]]

results of tests of one set of Charpy impact specimens or of two drop 
weight specimens, as applicable, taken from each plate as rolled. Impact 
specimens shall be taken as outlined in section 4(b) of ASTM A-300. The 
long axis of the Charpy specimen must be perpendicular to the final 
direction of rolling. When the direction of maximum stress is unknown, 
the manufacturer may certify on the basis of specimens taken parallel to 
the final direction of rolling.
    (b) Pipe or tube material. (1) The manufacturer of pipe, tube, or 
welded fittings formed from pipe or tube may certify such material by 
reporting the results of tests of one set of Charpy impact specimens, 
provided the requirement for production in this paragraph (b)(1) or 
paragraph (b)(2) of this section, as well as the requirement for 
sampling in paragraph (b)(3) of this section are met. The specimens 
shall have the major axis parallel to the length of pipe or tube. In the 
case of welding fittings, the specimens may be taken from the tubing 
prior to forming provided the fittings are normalized after forming. 
Such specimens shall be normalized before testing.
    (2) One set of specimens may represent each five (5) short tons, or 
less, of the pipe, tubes, or welding fittings produced from one heat of 
steel poured from a single melting furnace charge and subsequently 
processed in the same manner, provided all are given a normalizing heat-
treatment in a continuous treating furnace in which the temperature is 
automatically controlled and checked by recording pyrometer.
    (3) One set of specimens may represent each five (5) short tons, or 
less, of the pipe, tubes, or welding fittings that have been given a 
normalizing heat-treatment as a single charge in a batch-treating 
furnace equipped with recording pyrometer provided all have been 
produced from a single melting furnace heat and are subsequently 
processed in the same manner. If more than one melting furnace heat is 
present in the batch heat-treating furnace, means of identification 
shall be provided and one set of specimens shall be taken from each 
heat.
    (4) One set of impact specimens shall be taken from one pipe or tube 
picked at random from each heat or furnace batch or portion thereof to 
be certified.
    (c) Forgings and forged or rolled fittings. (1) The manufacturer of 
forgings for any purpose may certify them by reporting the results of 
tests of one set of Charpy impact specimens or two drop-weight 
specimens, as applicable, taken from each 5 short tons of product from 
each melting heat provided the requirements in this paragraph for 
production and sampling are met.
    (2) One or more test blocks shall be cut from billets or blooms 
selected at random from each heat of material. Each test block shall be 
forge-reduced in thickness to the thickness of the finished forgings to 
be certified, within the limitations set below. After forging to the 
reduced thickness, the test block shall be heat-treated in the same 
manner as the finished forgings represented, which heat-treatment of 
test blocks may be carried out in the furnace with the forgings, or 
separately. If carried out separately, both heat-treatments shall be 
done in automatically controlled furnaces equipped with calibrated 
recording pyrometers, the certified records of which shall be made 
available to the inspector.
    (3) One set of Charpy impact specimens or two drop-weight specimens, 
as applicable, shall be cut from each such test block and these 
specimens shall represent all forgings (up to 5 short tons) that are 
from the same heat of material and given the same heat-treatment as the 
test block, and the thickness of which does not differ from that of the 
test block by more than plus or minus 50 percent of 1\1/2\ inches, 
whichever is less, except that forged flanges and tube sheets thicker 
than 5\1/2\ inches may be qualified from a 4-inch test block.
    (4) As many test blocks shall be made as are required under the 
foregoing rule in paragraph (c)(3) of this section to cover the weight 
of product and range of thickness found in the forgings represented. The 
major axis of the test specimens shall be parallel to the length of the 
test block.
    (d) Bars and shapes, rolled or forged. (1) The manufacturer of 
forged or rolled bars and shapes may certify such by reporting the 
results of one set of Charpy impact specimens, or two drop-

[[Page 137]]

weight specimens, as applicable, produced from each 5 short tons from a 
single melting furnace heat, processed in a similar manner and heat-
treated as a single furnace batch, if heat-treated. The impact specimens 
shall be cut from the heaviest section, clear of fillets, of the shape 
being tested with the axis of the specimens parallel to the axis of the 
bar or shape.
    (e) Castings. (1) The manufacturer of castings may certify them by 
reporting the results of one set of Charpy impact specimens or two drop-
weight specimens, as applicable, taken from each 5 short tons of product 
from each melting furnace heat. These specimens shall be taken either 
directly from a production casting or from test coupons cast attached 
thereto provided the additional requirements in this paragraph are met.
    (2) One set of Charpy impact or two drop-weight specimens may 
represent all castings (up to 5 short tons) that are from the same heat 
of material and that have a thickness that does not differ from the 
thickness of the section from which the specimens were taken by more 
than plus or minus 25 percent, or 1\1/2\ inches, whichever is less. A 
wider range of thicknesses from one heat may be covered by taking 
additional sets of specimens from thicker or thinner material as may be 
required.
    (3) The test specimens shall be heat-treated in the same manner as 
the castings represented, which heat-treatment of specimens may be 
carried out in the furnace with the castings represented, or separately, 
but if carried out separately both heat-treatments shall be done in 
automatically controlled furnaces equipped with calibrated recording 
pyrometers, the certified records of which shall be made available to 
the marine inspector.
    (f) Small parts. The manufacturer of small parts, either cast or 
forged, may certify a lot of not more than 20 duplicate parts or 5 short 
tons, whichever is less, by reporting the results of one set of Charpy 
impact specimens, or two drop-weight specimens, as applicable, taken 
from one such part selected at random, provided the same kind of 
material and the same process of production were used for all of the 
lot. When the part is too small to provide the specimens of at least 
minimum size, no impact test need be made. For such parts too small to 
impact test, toughness qualifications shall be determined by the 
Commandant based on material, chemical, and mechanical properties.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CFR 73-254, 40 FR 
40164, Sept. 2, 1975]



Sec. 54.05-15   Weldment toughness tests--procedure qualification.

    (a) Plate for which Charpy V-notch impact testing is required in the 
parent material and for which V-notch minima are specified shall 
similarly have welding procedures qualified for toughness by Charpy V-
notch testing. For these tests, the test plates shall be oriented with 
their final rolling direction parallel to the weld axis (i.e., so that 
transverse impact specimens result), and with the V-notch normal to the 
plate surface. The sample weld joint preparation shall be the same as 
that used in production. The number of test specimens and the location 
of their notches shall be as shown in Figure 54.05-15(a) and as 
described in paragraphs (a) (1) through (5) of this section.
    (1) Three specimens with the notch centered in the weld metal.
    (2) Three specimens with the notch centered on the fusion line 
between parent plate and weld. (The fusion line may be identified by 
etching the specimen with a mild reagent.)
    (3) Three specimens with the notch centered in the heat affected 
zone, 1 mm from the fusion line.
    (4) Same as paragraph (a)(3) of this section, but 3 mm from the 
fusion line.
    (5) Same as paragraph (a)(3) of this section, but 5 mm from the 
fusion line.

[[Page 138]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.020


      Figure 54.05-15(a)--Charpy V-notch specimen removal details.
    (b) Plate materials for which Charpy V-notch minimums are not 
specified, or for which a Charpy V-notch correlation with NDT is not 
known, and which are themselves tested for toughness by the drop-weight 
procedure, shall have welding procedures similarly qualified by the 
drop-weight test. For such qualifications, two drop-weight specimens are 
to be tested, with the notch positioned directly above and parallel to 
the centerline of the weld.
    (c) Piping welding toughness tests shall be qualified, by making 
Charpy V-notch impact tests as prescribed in paragraph (a) of this 
section.
    (d) Materials which are specially approved based on toughness 
criteria or

[[Page 139]]

tests, other than those discussed in paragraphs (a) and (b) of this 
section, shall have welding procedures tested and qualified for 
toughness as deemed appropriate and necessary by the Commandant.
    (e) In the case of stainless steels, weld procedure toughness tests 
may be limited to weld metal only if this is all that is required by 
Sec. 54.25-15.



Sec. 54.05-16   Production toughness testing.

    (a) For vessels of welded construction, production toughness test 
plates shall be prepared for each 50 feet of longitudinal and 
circumferential butt weld in each Class I-L vessel, or for each 150 feet 
in each Class II-L vessel, except for material other than stainless 
steel that is exempted from impact test requirements by this subchapter. 
In the case of stainless steels, weld production toughness tests may be 
limited to weld metal only if this is all that is required be 
Sec. 54.25-15. The test-plate thickness shall be the same as that of the 
vessel wall at the location of the production weld being sampled. The 
test plates shall be prepared, wherever possible, as run-off tabs 
attached at the ends of weld butts or seams. The rolling direction of 
the run-off tabs should be oriented parallel to the rolling direction of 
the adjacent production material. The test-plate material shall be taken 
from one of the heats of material used in the vessel, and both the 
electrodes and welding procedures shall be the same as used in the 
fabrication of the vessel. From each test plate, one set of three Charpy 
impact bars or two drop-weight specimens, as applicable according to the 
test used in procedure qualification, shall be taken transverse to the 
weld axis. For Charpy V-notch specimens, the notch shall be normal to 
the material surface and its location alternated (approximately) on 
successive tests between the weld metal and heat affected zone. Thus, 
approximately half of all weld production impact tests will be of weld 
metal and half of heat affected zone material. For the weld metal tests, 
the V-notch is to be centered between the fusion lines. For the heat 
affected zone tests, the notch is to be centered so as to sample, as 
nearly as practicable, the most critical location for toughness observed 
in the weld procedure qualification tests. Where the drop weight 
specimen is used in production weld testing, it shall be prepared in the 
same manner as specified for procedure qualification testing, 
Sec. 54.05-15(b).
    (b) For vessels not exceeding 5 cubic feet in volume, one set of 
impact specimens, or two drop-weight specimens, as applicable according 
to the test used in procedure qualification, may represent all vessels 
from the same heat of material not in excess of 100 vessels, or one 
heat-treatment furnace batch. In addition, when such vessels are welded, 
one weld test plate made from one of the heats of material used, and two 
sets of impact specimens or two drop-weight specimens, as applicable, 
cut therefrom, may represent the weld metal in the smallest of: One lot 
of 100 vessels or less; or each heat-treatment furnace batch; or each 50 
feet of welding for Class I-L vessels; or each 150 feet of welding for 
Class II-L vessels.
    (c) For several vessels or parts of vessels being welded in 
succession, the plate thickness of which does not vary by more than one-
fourth inch, and which are made of the same grade of material, a test 
plate shall be furnished for each 50 feet of welding for Class I-L 
vessels or 150 feet of welding for Class II-L vessels. For each 50- or 
150-foot increment of weld, as applicable, the test plates shall be 
prepared at the time of fabrication of the first vessel involving that 
increment.
    (d) The test plates and any other test material from which toughness 
test specimens are cut shall be given the same heat-treatment as the 
production material they represent. Test specimens representing other 
material than the weld toughness test plates shall preferably be cut 
from a part of the vessel material but may be cut from like material 
that has been heat-treated within the temperature range specified by the 
producer in treating the actual vessel material.
    (e) For nonpressure vessel type tanks and associated secondary 
barriers, as defined in Sec. 38.05-4, subchapter D (Tank Vessels) of 
this chapter, production toughness test plates shall be prepared in 
accordance with paragraphs (a) and (d) of this section. One set of 
toughness

[[Page 140]]

test plates shall be prepared for each 165 feet (50 meters) of 
production butt type welds.



Sec. 54.05-17   Weld toughness test acceptance criteria.

    (a) For Charpy V-notch impact tests the energy absorbed in both the 
weld metal and heat affected zone impact tests in weld qualification and 
production shall be:
    (1) For weld metal specimens, not less than the transverse values 
required for the parent material.
    (2) For heat affected zone specimens, when the specimens are 
transversely oriented, not less than the transverse values required for 
the parent material.
    (3) For heat affected zone specimens, when the specimens are 
longitudinally oriented, not less than 1.5 times the transverse values 
required for the parent material.
    (b) For drop-weight tests both specimens from each required set 
shall exhibit a no-break performance.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40164, Sept. 2, 1975]



Sec. 54.05-20   Impact test properties for service of 0 deg. F and below.

    (a) Test energy. The impact energies of each set of transverse 
Charpy specimens may not be less than the values shown in Table 54.05-
20(a). Only one specimen in a set may be below the required average and 
the value of that specimen must be above the minimum impact value 
permitted on one specimen only. See Sec. 54.05-5(c) for retest 
requirements.

          Table 54.05-20(a)--Charpy v-notch impact requirements         
------------------------------------------------------------------------
                                      Minimum impact                    
                                      value required     Miminum impact 
                                      for average of    value permitted 
         Size of specimen             each set of 3     on one specimen 
                                     specimens foot-     only of a set, 
                                        pounds\1\         foot-pounds   
------------------------------------------------------------------------
10  x  10 mm......................               20.0               13.5
10  x  7.5 mm.....................               16.5               11.0
10  x  5 mm.......................               13.5                9.0
10  x  2.5 mm.....................               10.0               6.5 
------------------------------------------------------------------------
\1\Straight line interpolation for intermediate values is permitted.    

    (b) Transversely oriented Charpy V-notch impact specimens of ASTM A-
203 nickel steels must exhibit energies not less than the values shown 
in Sec. 54.05-20 (a). Requirements for 9 percent nickel steels are 
contained in Sec. 54.25-20. Other nickel alloy steels, when specially 
approved by the Commandant, must exhibit a no-break performance when 
tested in accordance with the drop weight procedure. If, for such 
materials, there are data indicating suitable correlation with drop-
weight tests, Charpy V-notch tests may be specially considered by the 
Commandant in lieu of drop-weight tests. If the drop-weight test cannot 
be performed because of material thickness limitations (less than one-
half inch), or product shape, or is otherwise inapplicable (because of 
heat treatment, chemistry etc.) other tests or test criteria will be 
specified by the Commandant.
    (c) Where sufficient data are available to warrant such waiver, the 
Commandant may waive the requirements for toughness testing austenitic 
stainless steel materials. Where required, austenitic stainless steels 
are to be tested using the drop-weight procedure and must exhibit a no-
break performance. Where data are available indicating suitable 
correlation of Charpy V-notch results with drop-weight NDT or no-break 
performance, Charpy V-notch tests may be specially considered by the 
Commandant in lieu of dropweight tests. If the dropweight test cannot be 
performed because of material thickness limitations (less than one-half 
inch), or product shape, or is otherwise inapplicable (because of heat 
treatment, chemistry, etc.) other tests and/or test criteria will be 
specified by the Commandant.

[CGD 73-254, 40 FR 40164, Sept. 2, 1975]
Sec. 54.05-25  [Reserved]



Sec. 54.05-30   Allowable stress values at low temperatures.

    (a) The Coast Guard will give consideration to the enhanced yield 
and tensile strength properties of ferrous and nonferrous materials at 
low temperature for the purpose of establishing allowable stress values 
for service temperature below 0 deg. F.
    (b) The use of such allowable stress values must be specially 
approved by the Coast Guard for each application.

[[Page 141]]

Further information may be obtained by writing to the Coast Guard (G-
MSE).
    (c) Submittals must include information and calculations specified 
by the Coast Guard (G-MSE) to demonstrate that the allowable stress for 
the material cannot be exceeded under any possible combination of vessel 
loads and metal temperature.

[CGD 73-133R, 39 FR 9179, Mar. 8, 1974, as amended by CGD 82-063b, 48 FR 
4781, Feb. 3, 1983; CGD 95-072, 60 FR 50462, Sept. 29, 1995; CGD 96-041, 
61 FR 50727, 50728, Sept. 27, 1996]



            Subpart 54.10--Inspection, Reports, and Stamping



Sec. 54.10-1   Scope (modifies UG-90 through UG-103 and UG-115 through UG-120).

    (a) The inspection, tests, stamping, and reports for pressure 
vessels shall be as required by paragraphs UG-90 through UG-103 and UG-
115 through UG-120 of the ASME Code except as noted otherwise in this 
subpart.



Sec. 54.10-3   Marine inspectors (replaces UG-90 and UG-91, and modifies UG-92 through UG-103).

    (a) Only marine inspectors shall apply the Coast Guard Symbol. They 
will not apply any other code symbol to pressure vessels.
    (b) All pressure vessels not exempted under provisions of 
Sec. 54.01-15 shall be inspected by a marine inspector referring to 
procedures outlined in UG-92 through UG-103 of the ASME Code and 
Secs. 50.30-10, 50.30-15, and 50.30-20 of this subchapter. The marine 
inspector will then stamp the vessel with the Coast Guard Symbol.
    (c) Pressure vessels described in Sec. 54.01-5(c)(3), except 
pressure vessels in systems regulated under Sec. 58.60 of this chapter, 
must be visually examined by a marine inspector prior to installation. 
The marine inspector also reviews the associated plans and 
manufacturers' data reports. If, upon inspection, the pressure vessel 
complies with the applicable requirements in Sec. 54.01-5, the marine 
inspector stamps the pressure vessel with the Coast Guard Symbol.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 77-147, 47 FR 
21810, May 20, 1982]



Sec. 54.10-5   Maximum allowable working pressure (reproduces UG-98).

    (a) The maximum allowable working pressure for a vessel is the 
maximum pressure permissable at the top of the vessel in its normal 
operating position at the operating temperature specified for that 
pressure. It is the least of the values found for maximum allowable 
working pressure for any of the essential parts of the vessel by the 
principles given in paragraph (b) of this section and adjusted for any 
difference in static head that may exist between the part considered and 
the top of the vessel. (See UA-60 (a) of the ASME Code.)
    (b) The maximum allowable working pressure for a vessel part is the 
maximum internal or external pressure, including the static head 
thereon, as determined by the rules and formulas in this Division (ASME 
Code), together with the effect of any combination of loadings listed in 
UG-22 of the ASME Code (see Sec. 54.01-30) which are likely to occur, 
for the designated coincident operating temperature, excluding any metal 
thickness specified as corrosion allowance. (See UG-25 of the ASME 
Code.)
    (c) Maximum allowable working pressure may be determined for more 
than one designated operating temperature, using for each temperature 
the applicable allowable stress value.

    Note: Table 54.10-5 gives pictorially the interrelation among the 
various pressure levels pertinent to this part of the regulations. It 
includes reference to section VIII of the ASME Code for definitions and 
explanations.

[[Page 142]]



       Table 54.10-5--Pictorial Inter -Relation Among Various Pressure Levels With References to Specific       
                                                 Requirements\1\                                                
----------------------------------------------------------------------------------------------------------------
                                                                                       Pressures upon which     
   Pressure differential, psi\2\        Test pressures\3\     Relief device pressure    relief device flow      
                                                                     settings            capacity is based      
----------------------------------------------------------------------------------------------------------------
                                     Burst proof test (UG-    ......................  ......................    
                                      101(m) of ASME Code).                                                     
                                     Yield proof test (UG-    ......................  ......................    
                                      101(j) of ASME Code).                                                     
                                     Standard hydrostatic     ......................  ......................    
                                      test (UG-99 of ASME                                                       
                                      Code).                                                                    
                                     .......................  ......................  Fire exposure, 120%       
                                                                                       MAWP..                   
                                     Pneumatic test (UG-100   ......................  ......................    
                                      of ASME Code).                                                            
                                     .......................  Rupture disk burst      ......................    
                                                               (Sec.  54.15-13).                                
                                     .......................  ......................  Normal, 110% MAWP.....    
----------------------------------------------------------------------------------------------------------------
                                     Maximum allowable        Maximum allowable       Maximum allowable         
                                      working pressure         working pressure        working pressure         
                                      (MAWP), UG-98 and UA-    (MAWP), UG-98 and UA-   (MAWP), UG-98 and UA-    
                                      60(a) of ASME Code.      60(a) of ASME Code.     60(a) of ASME Code..     
----------------------------------------------------------------------------------------------------------------
                                     Design pressure, UG-21,  Design pressure, UG-21  Design pressure, UG-21    
                                      and UA-60(b) of ASME     and UA-60(b) of ASME    and UA-60(b) of ASME     
                                      Code.                    Code.                   Code..                   
                                     .......................  Safety or relief value  ......................    
                                                               setting (UG-133 of                               
                                                               ASME Code).                                      
                                     Operating pressure (UA-  Operating pressure (UA- Operating pressure (UA-   
                                      60(f) of ASME Code).     60(f) of ASME Code).    60(f) of ASME Code). .   
----------------------------------------------------------------------------------------------------------------
\1\For basic pressure definitions see Sec.  52.01-3(g) of this subchapter.                                      
\2\For pressure differentials above 3,000 pounds per square inch (p.s.i.), special requirements may apply.      
\3\For the basis for calculating test pressures, see UA-60(e) of the ASME Code.                                 



Sec. 54.10-10   Standard hydrostatic test (modifies UG-99).

    (a) All pressure vessels shall satisfactorily pass the hydrostatic 
test prescribed by this section, except those pressure vessels noted 
under Sec. 54.10-15(a).
    (b) The hydrostatic test pressure shall be at least one and one-half 
times the maximum allowable working pressure stamped on the pressure 
vessel, multiplied by the ratio of the stress value ``S'' at the test 
temperature to the stress value ``S'' at the design temperature for the 
materials of which the pressure vessel is constructed. The values for 
``S'' shall be taken from Tables UCS 23, UNF 23, UHA 23, or UHT 23 of 
the ASME Code. The value of ``S'' at test temperature shall be that 
taken for the material of the tabulated value of temperature closest to 
the test temperature. The value of ``S'' at design temperature shall be 
as interpolated from the appropriate table. No ratio less than one shall 
be used. The stress resulting from the hydrostatic test shall not exceed 
90 percent of the yield stress of the material at the test temperature. 
External loadings which will exist in supporting structure during the 
hydrostatic test should be considered. The design shall consider the 
combined stress during hydrostatic testing due to pressure and the 
support reactions. This stress shall not exceed 90 percent of the yield 
stress of the material at the test temperature. In addition the adequacy 
of the supporting structure during hydrostatic testing should be 
considered in the design.
    (c) The hydrostatic test pressure shall be applied for a sufficient 
period of time to permit a thorough examination of all joints and 
connections. The test shall not be conducted until the vessel and liquid 
are at approximately the same temperature.
    (d) Defects detected during the hydrostatic test or subsequent 
examination shall be completely removed and then inspected. Provided the 
marine inspector gives his approval, they may then be repaired.
    (e) Vessels requiring stress relieving shall be stress relieved 
after any welding repairs have been made. (See UW-40 of the ASME Code.)
    (f) After repairs have been made the vessel shall again be tested in 
the regular way, and if it passes the test, the marine inspector may 
accept it. If it

[[Page 143]]

does not pass the test, the marine inspector can order supplementary 
repairs, or, if in his judgment the vessel is not suitable for service, 
he may permanently reject it.



Sec. 54.10-15   Pneumatic test (modifies UG-100).

    (a) Pneumatic testing of welded pressure vessels shall be permitted 
only for those units which are so designed and/or supported that they 
cannot be safely filled with water, or for those units which cannot be 
dried and are to be used in a service where traces of the testing medium 
cannot be tolerated.
    (b) Proposals to pneumatically test shall be submitted to the 
cognizant Officer in Charge, Marine Inspection, for approval.
    (c) Except for enameled vessels, for which the pneumatic test 
pressure shall be at least equal to, but need not exceed, the maximum 
allowable working pressure to be marked on the vessel, the pneumatic 
test pressure shall be at least equal to 1.25 times the maximum 
allowable working pressure to be stamped on the vessel multiplied by the 
lowest ratio (for the materials of which the vessel is constructed) of 
the stress value ``S'' for the test temperature of the vessel to the 
stress value ``S'' for the design temperature (see UG-21 of the ASME 
Code). In no case shall the pneumatic test pressure exceed 1.25 times 
the basis for calculated test pressure as defined in UA-60(e) of the 
ASME Code.
    (d) The pneumatic test of pressure vessels shall be accomplished as 
follows:
    (1) The pressure on the vessel shall be gradually increased to not 
more than half the test pressure.
    (2) The pressure will then be increased at steps of approximately 
one-tenth the test pressure until the test pressure has been reached.
    (3) The pressure will then be reduced to the maximum allowable 
working pressure of the vessel to permit examination.
    (e) Pressure vessels pneumatically tested shall also be leak tested. 
The test shall be capable of detecting leakage consistent with the 
design requirements of the pressure vessel. Details of the leak test 
shall be submitted to the Commandant for approval.
    (f) After satisfactory completion of the pneumatic pressure test, 
the vessel may be stamped in accordance with Sec. 54.10-20. A marine 
inspector shall observe the pressure vessel in a loaded condition at the 
first opportunity following the pneumatic test. The tank supports and 
saddles, connecting piping, and insulation if provided shall be examined 
to determine if they are satisfactory and that no leaks are evident.
    (g) The pneumatic test is inherently more hazardous than a 
hydrostatic test, and suitable precautions shall be taken to protect 
personnel and adjacent property.



Sec. 54.10-20   Marking and stamping.

    (a) Pressure vessels (replaces UG-116, except paragraph (k), and UG-
118). Pressure vessels that are required by Sec. 54.10-3 to be stamped 
with the Coast Guard Symbol must also be stamped with the following 
information:
    (1) Manufacturer's name and serial number.
    (2) Coast Guard number, see Sec. 50.10-30 of this subchapter.
    (3) Coast Guard Symbol, which is affixed only by the marine 
inspector.
    (4) Maximum allowable working pressure ---- kPa (---- psig) at ---- 
deg. C (---- deg. F).
    (5) Class.
    (6) Minimum service temperature allowed, if below -18 deg. C (0 deg. 
F)
    (7) Water capacity in liters (U.S. gallons), if a cargo carrying 
pressure vessel.
    (b) Multichambered pressure vessels (replaces UG-116(k)). In cases 
where more than one pressure vessel is involved in an integral 
construction, as with a heat exchanger, the manufacturer may elect to 
class the component pressure vessels differently. In such cases he shall 
stamp the combined structures as required in paragraph (a) of this 
section with information for each pressure vessel. Where an item for 
stamping is identical for both vessels, as with name and address of 
manufacturer, it need not be duplicated. However, where differences 
exist, each value and the vessel to which it applies shall be clearly 
indicated.

[[Page 144]]

    (c) Stamping data (replaces UG-117). Except as noted in paragraph 
(d) of this section, the data shall be stamped directly on the pressure 
vessel. The data shall be legibly stamped and shall not be obliterated 
during the service life of the pressure vessel. In the event that the 
portion of the pressure vessel upon which the data is stamped is to be 
insulated or otherwise covered, the data shall be reproduced on a metal 
nameplate. This plate shall be securely attached to the pressure vessel. 
The nameplate shall be maintained in a legible condition such that it 
may be easily read.
    (1) Those parts of pressure vessels requiring Coast Guard shop 
inspection under this part which are furnished by other than the shop of 
the manufacturer responsible for the completed vessel shall be stamped 
with the Coast Guard Symbol, the Marine Inspection Office identification 
letters (see Sec. 50.10-30 of this subchapter) and the word ``Part'', 
the manufacturer's name and serial number, and the design pressure.
    (d) Thin walled vessels (modifies UG-119). In lieu of direct 
stamping on the pressure vessel, the information required by paragraph 
(a) of this section shall be stamped on a nameplate permanently attached 
to the pressure vessel when the pressure vessel is constructed of--
    (1) Steel plate less than one-fourth inch thick; or
    (2) Nonferrous plate less than one-half inch thick.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970; CGD 72-206R, 38 FR 17226, June 29, 1973; CGD 77-
147, 47 FR 21810, May 20, 1982]



Sec. 54.10-25   Manufacturers' data report forms (modifies UG-120).

    (a) The Manufacturers' data report form, as provided by the Coast 
Guard, shall be completed in duplicate and certified by the manufacturer 
for each pressure vessel required to be shop inspected under these 
regulations. The original of this form shall be delivered to the Coast 
Guard inspector.
    (b) Data forms for those parts of a pressure vessel requiring 
inspection, which are furnished by other than the shop of the 
manufacturer responsible for the completed unit, shall be executed in 
triplicate by the manufacturer of the parts. The original and one copy 
shall be delivered to the Coast Guard inspector who shall forward one 
copy of the report to the Officer in Charge, Marine Inspection, having 
cognizance over the final assembly. These partial data reports, together 
with the final inspection and tests, shall be the final Coast Guard 
inspector's authority to apply the Coast Guard symbol and number. A 
final data report shall be executed by the manufacturer or assembler who 
completes the final assembly and tests.
    (c) If a pressure vessel is required to be inspected in accordance 
with Sec. 54.10-3(c), the manufacturer's data reports required by UG-120 
must be made available to the Coast Guard inspector for review prior to 
inspection of the pressure vessel.

(Approved by the Office of Management and Budget under control number 
2130-0181)

[CGFR 69-127, 35 FR 9977, June 17, 1970 as amended by CGD 77-147, 47 FR 
21810, May 20, 1982]



                 Subpart 54.15--Pressure-Relief Devices



Sec. 54.15-1  General (modifies UG-125 through UG-136).

    (a) All pressure vessels built in accordance with applicable 
requirements in Division 1 of section VIII of the ASME Code must be 
provided with protective devices as indicated in UG-125 through UG-136 
except as noted otherwise in this subpart.
    (b) The markings shall be in accordance with this chapter for 
devices covered by Sec. 54.15-10.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 88-032, 56 FR 
35822, July 29, 1991]



Sec. 54.15-3   Definitions (modifies UA-60).

    (a) Definitions applicable to this subpart are in Sec. 52.01-3 of 
this subchapter.



Sec. 54.15-5   Protective devices (modifies UG-125).

    (a) All pressure vessels must be provided with protective devices. 
The protective devices must be in accordance with the requirements of 
UG-125 through UG-136 of the ASME Code except as modified in this 
subpart.

[[Page 145]]

    (b) An unfired steam boiler evaporator or heat exchanger (see 
Sec. 54.01-10) shall be equipped with protective devices as required by 
Sec. 54.15-15.
    (c) All pressure vessels other than unfired steam boilers shall be 
protected by pressure-relieving devices that will prevent the pressure 
from rising more than 10 percent above the maximum allowable working 
pressure, except when the excess pressure is caused by exposure to fire 
or other unexpected source of heat.
    (d) Where an additional hazard can be created by exposure of a 
pressure vessel to fire or other unexpected sources of external heat 
(for example, vessels used to store liquefied flammable gases), 
supplemental pressure-relieving devices shall be installed to protect 
against excessive pressure. Such supplemental pressure-relieving devices 
shall be capable of preventing the pressure from rising more than 20 
percent above the maximum allowable working pressure of the vessel. The 
minimum required relief capacities for compressed gas pressure vessels 
are given under Sec. 54.15-25. A single pressure-relieving device may be 
used to satisfy the requirements of this paragraph and paragraph (c) of 
this section, provided it meets the requirements of both paragraphs.
    (e) Pressure-relieving devices should be selected on the basis of 
their intended service. They shall be constructed, located, and 
installed so that they are readily accessible for inspection and repair 
and so arranged that they cannot be readily rendered inoperative.
    (f) Where pressure-indicating gages are used, they shall be chosen 
to be compatible with the pressure to be indicated. The size of the 
visual display, the fineness of graduations, and the orientation of the 
display will be considered. In no case shall the upper range of the gage 
be less than 1.2 times nor more than 2 times the pressure at which the 
relieving device is set to function.
    (g) The Commandant may authorize or require the use of a rupture 
disk in lieu of a relief or safety valve under certain conditions of 
pressure vessel use and design. See Sec. 54.15-13.
    (h) Vessels that are to operate completely filled with liquid shall 
be equipped with liquid relief valves unless otherwise protected against 
overpressure.
    (i) The protective devices required under paragraph (a) of this 
section shall be installed directly on a pressure vessel except when the 
source of pressure is external to the vessel, and is under such positive 
control that the pressure in the vessel cannot exceed the maximum 
allowable working pressure at the operating temperature except as 
permitted in paragraphs (c) and (d) of this section.
    (j) Pressure-relieving devices shall be constructed of materials 
suitable for the pressure, temperature, and other conditions of the 
service intended.
    (k) The opening through all pipes and fittings between a pressure 
vessel and its pressure-relieving device shall have at least the area of 
the pressure-relieving device inlet, and in all cases shall have 
sufficient area so as not to unduly restrict the flow to the pressure-
relieving device. The opening in the vessel shall be designed to provide 
direct and unobstructed flow between the vessel and its pressure-
relieving device.
    (l) Safety devices need not be provided by the pressure vessel 
manufacturer. However, overpressure protection shall be provided prior 
to placing the vessel in service.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended bu CGD 88-032, 56 FR 
35822, July 29, 1991; CGD 95-012, 60 FR 48049, Sept. 18, 1995]



Sec. 54.15-10   Safety and relief valves (modifies UG-126).

    (a) All safety and relief valves for use on pressure vessels or 
piping systems shall be designed to meet the protection and service 
requirements for which they are intended and shall be set to relieve at 
a pressure which does not exceed the ``maximum allowable working 
pressure'' of the pressure vessel or piping system. Relief valves are 
not required to have huddling chambers for other than steam service. In 
addition, safety valves used on vessels in which steam is generated 
shall meet Sec. 52.01-120 of this subchapter except Sec. 52.01-
120(a)(9). For steam service below 206 kPa (30 psig), bodies of safety

[[Page 146]]

valves may be made of cast iron. Safety relief valves used in liquefied 
compressed gas service shall meet subpart 162.017 or 162.018 in 
subchapter Q (Specifications) of this chapter as appropriate.
    (b) Pilot-valve control or other indirect operation of safety valves 
is not permitted unless the design is such that the main unloading valve 
will open automatically at not over the set pressure and will discharge 
its full rated capacity if some essential part of the pilot or auxiliary 
device should fail. All other safety and relief valves shall be of the 
direct spring loaded type.
    (c) Safety and relief valves for steam or air service shall be 
provided with a substantial lifting device so that the disk can be 
lifted from its seat when the pressure in the vessel is 75 percent of 
that at which the valve is set to blow.
    (d) Safety and relief valves for service other than steam and air 
need not be provided with a lifting device although a lifting device is 
desirable if the vapors are such that their release will not create a 
hazard.
    (e) If the design of a safety or relief valve is such that liquid 
can collect on the discharge side of the disk, the valve shall be 
equipped with a drain at the lowest point where liquid can collect (for 
installation, see UG-134 of section VIII of the ASME Code).
    (f) Cast iron may be employed in the construction of relief valves 
for pressures not exceeding 125 pounds per square inch and temperatures 
not exceeding 450 deg. F. Seats or disks of cast iron are prohibited.
    (g) The spring in a relief valve in service for pressures up to and 
including 250 pounds per square inch shall not be reset for any pressure 
more than 10 percent above or 10 percent below that for which the relief 
valve is marked. For higher pressures, the spring shall not be reset for 
any pressure more than 5 percent above or 5 percent below that for which 
the relief valve is marked.
    (h) The rated relieving capacity of safety and relief valves for use 
on pressure vessels shall be based on actual flow test data and the 
capacity shall be certified by the manufacturer in accordance with one 
of the following:
    (1) 120 percent of the valve set pressure for valves rated in 
accordance with Compressed Gas Association Standard S-1.2.5.2.
    (2) 110 percent of the valve set pressure for valves rated in 
accordance with UG-131 of section VIII of the ASME Code.
    (3) 103 percent of the valve set pressure for steam in accordance 
with PG-69 of the ASME Code.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 81-79, 50 FR 
9436, Mar. 8, 1985]



Sec. 54.15-13   Rupture disks (modifies UG-127).

    (a) Paragraph UG-127 of the ASME Code provides for the use of 
rupture disks in series with spring loaded safety or relief valves.
    (b) For certain pressure vessels containing substances which may 
render a relief or safety valve inoperative, or where the installation 
of a valve is considered impractical, the Commandant may authorize or 
require the use of a rupture disk in parallel with or in lieu of a 
spring loaded safety or relief valve. These rupture disks shall:
    (1) Comply with the general provisions of Sec. 54.15-5 except as 
noted otherwise in this section;
    (2) Have a capacity for discharge such that the volume of release is 
sufficient to prevent the internal pressure from exceeding 120 percent 
of the ``maximum allowable working pressure'' with the pressure vessel 
exposed to fire conditions (see Sec. 54.15-25); and,
    (3) Operate at a pressure level which does not produce fatigue 
failure of the disk. The normal maximum operating pressure multiplied by 
1.3 shall not exceed the nominal disk burst pressure. (Notice that this 
restriction for protection of the rupture disk will usually require 
operation below the ``maximum allowable working pressure'' of the 
pressure vessel and therefore should be considered in design.)
    (c) All disks shall be oriented so that if rupture occurs, the disk 
fragments and pressure vessel discharge will be directed away from 
operating personnel and vital machinery.

[[Page 147]]



Sec. 54.15-15   Relief devices for unfired steam boilers, evaporators, and heat exchangers (modifies UG-126).

    (a) An approved safety valve set to relieve at a pressure not 
exceeding the ``maximum allowable working pressure'' of the shell shall 
be fitted to all unfired steam boilers and evaporators except for 
evaporators of the atmospheric type designed for vapor discharge direct 
to a distiller with no shutoff valve in the discharge line. The 
distiller connected to atmospheric evaporators shall be fitted with a 
vent to prevent a buildup in pressure. In no case shall the vent be less 
than 1\1/2\ inches in diameter. Evaporators operating between 
atmospheric pressure and 15 p.s.i.g., may use a rupture disc as an 
alternative to the safety valve.
    (b) Safety valves for use on pressure vessels in which steam or 
pressure is generated shall comply with the requirements of Sec. 54.15-
10. Rupture discs used in lieu of these safety valves, as provided for 
in paragraph (a) of this section, shall comply with the requirements of 
Sec. 54.15-13.
    (c) The relieving capacity of evaporator safety valves required by 
paragraph (a) of this section shall be at least equal to the capacity of 
the orifice fitted in the steam supply to the evaporator. The orifice 
capacity shall be determined in accordance with the formula in paragraph 
(c)(1) or (2) of this section as appropriate:
    (1) Where the set pressure of the evaporator shell safety valve is 
58 percent or less than the setting of the safety valve in the steam 
supply:

                                W=51.45AP

    (2) Where the set pressure of the evaporator shell safety valve 
exceeds 58 percent of the setting of the safety valve on the steam 
supply:

                   W=105.3AP1(P-P1)

where:
W=The required orifice capacity, in pounds per hour.
A=Cross-sectional area of rounded entrance orifice, in square inches. 
The orifice shall be installed near the steam inlet or the coils or 
tubes and where no orifice is employed the area used in the formula 
shall be that of the inlet connection or manifold.
P=Set pressure of steam supply safety valve, in pounds per square inch, 
absolute.
P1=Set pressure of evaporator shell safety valve, in pounds per 
square inch, absolute.

    (d) The relieving capacity of safety valves on unfired steam boilers 
shall not be less than the maximum generating capacity of the unfired 
steam boiler as certified by the manufacturer.
    (e) On new installations and where the orifice size of an existing 
unfired steam boiler or evaporator is increased, an accumulation test 
shall be made by closing all steam outlet connections except the safety 
valves for a period of five minutes. When conducting the accumulation 
test, the water shall be at the normal operating level and the steam 
pressure shall be at the normal operating pressure, and while under this 
test the pressure shall not rise more than 6 percent above the safety 
valve setting.
    (f) A heat exchanger with liquid in the shell and the heating medium 
in the tubes or coils, shall be fitted with a liquid relief valve 
meeting the requirement of Sec. 54.15-5.
    (g)(1) A heat exchanger with steam in the shell and liquid in the 
tubes or coils at a pressure exceeding that in the shell, shall have a 
liquid relief valve fitted to protect the shell against excess pressure.
    (2) The discharge capacity of such relief valves shall be calculated 
on the basis of the discharge from one tube using the difference in 
pressures between that in the shell and that in the tubes and shall be 
not less than that determined by the following formula:

                 Q=29.81KD2P1-P2

where:

Q=Required relief valve discharge capacity, in gallons per minute, based 
on relief valve set pressure.
P1=Pressure in the tube or coils, in pounds per square inch.
P2=Set pressure of the shell relief valve, in pounds per square 
inch.
D=Internal diameter of the largest tube or coil, in inches.
K=Coefficient of discharge=0.62.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 72-206R, 38 
FR 17226, June 29, 1973]

[[Page 148]]



Sec. 54.15-25  Minimum relief capacities for cargo tanks containing compressed or liquefied gas.

    (a) Each tank shall be fitted with one or more safety relief valves 
designed, constructed, and flow tested in accordance with subpart 
162.017 or 162.018 in subchapter Q (Specifications) of this chapter. 
Valves conforming to specification subpart 162.017 shall be limited to 
use on tanks whose maximum allowable working pressure is not in excess 
of 10 pounds per square inch. With specific approval of the Commandant, 
such valves may be connected to the vessel in lieu of being directly 
fitted to the tanks.
    (b) The discharge pressure and the maximum overpressure permitted 
shall be in accordance with Sec. 54.15-5.
    (c) The rate of discharge for heat input of fire must meet the 
following formula:

    Q=FGA0.82

Where:
    Q=minimum required rate of discharge in cubic meters (cubic feet) 
per minute of air at standard conditions 0 deg. C and 1.03 kp/cm2 
(60 deg. F and 14.7 psia).
    F=fire exposure factor for the following tank types:
    F=1.0 for tanks without insulation located on the open deck.
    F=0.5 for tanks on the open deck having insulation that has approved 
fire proofing, thermal conductance, and stability under fire exposure.
    F=0.5 for uninsulated independent tasks installed in holds.
    F=0/2 for insulated independent tanks in holds or for uninsulated 
independent tanks in insulated holds.
    F=0.1 for insulated independent tanks in inerted holds or for 
uninsulated independent tanks in inerted, insulated holds.
    F=0.1 for membrane and semi-membrane tanks.
    G=gas factor of:
    [GRAPHIC] [TIFF OMITTED] TC01FE91.021
    
Where:
    L=latent heat of the material being vaporized at the relieving 
conditions, in Kcal/kg (Btu per pound).
    C=constant based on relation of specific heats (k), Table 
Sec. 54.15-25(c) (if k is not known, C=.606(315)).
    Z=compressibility factor of the gas at the relieving conditions (if 
not known, Z=1.0).
    T=temperature in degrees K=(273 + degrees C) (R=(460 + degrees F)) 
at the relieving conditions (120% of the pressure at which the pressure 
relief valve is set).
    M=molecular weight of the product.
    A=external surface area of the tank in m2 (sq. ft.) for the 
following tank types:
For a tank of a body of revolution shape:
    A=external surface area.
For a tank other than a body of revolution shape:
    A=external surface area less the projected bottom surface area.
For a grouping of pressure vessel tanks having insulation on the 
          vessel's structure:
    A=external surface area of the hold without the projected bottom 
area.
For a grouping of pressure tanks having insulation on the tank:
    A=external surface area of the pressure tanks excluding insulation, 
and without the projected bottom area.1
---------------------------------------------------------------------------

    1 Figure 54.15-25(c) shows a method of determining the side external 
surface area of a grouping of vertical pressure tanks.

---------------------------------------------------------------------------

[[Page 149]]

  
[GRAPHIC] [TIFF OMITTED] TC01FE91.022


                      Table 54.15-25(c)--Constant C                     
------------------------------------------------------------------------
                       k                             C                  
------------------------------------------------------------------------
1.00..........................................         .606        (315)
1.02..........................................         .611        (318)
1.04..........................................         .615        (320)
1.06..........................................         .620        (322)
1.08..........................................         .624        (324)
1.10..........................................         .628        (327)
1.12..........................................         .633        (329)
1.14..........................................         .637        (331)
1.16..........................................         .641        (333)
1.18..........................................         .645        (335)
1.20..........................................         .649        (337)
1.22..........................................         .652        (339)
1.24..........................................         .658        (341)
1.26..........................................         .660        (343)
1.28..........................................         .664        (345)
1.30..........................................         .667        (347)
1.32..........................................         .671        (349)
1.34..........................................         .674        (351)
1.36..........................................         .677        (352)
1.38..........................................         .681        (354)
1.40..........................................         .685        (356)
1.42..........................................         .688        (358)
1.44..........................................         .691        (359)
1.46..........................................         .695        (361)
1.48..........................................         .698        (363)
1.50..........................................         .701        (364)
1.52..........................................         .704        (366)
1.54..........................................         .707        (368)
1.56..........................................         .710        (369)
1.58..........................................         .713        (371)
1.60..........................................         .716        (372)
1.62..........................................         .719        (374)
1.64..........................................         .722        (376)
1.66..........................................         .725        (377)
1.68..........................................         .728        (379)
1.70..........................................         .731        (380)
1.72..........................................         .734        (382)
1.74..........................................         .736        (383)
1.76..........................................         .739        (384)
1.78..........................................         .742        (386)
1.80..........................................         .745        (387)
1.82..........................................         .747        (388)
1.84..........................................         .750        (390)
1.86..........................................         .752        (391)
1.88..........................................         .755        (392)
1.90..........................................         .758        (394)
1.92..........................................         .760        (395)
1.94..........................................         .763        (397)
1.96..........................................         .765        (398)
1.98..........................................         .767        (399)
2.00..........................................         .770        (400)
2.02..........................................         .772        (401)
2.20..........................................         .792        (412)
------------------------------------------------------------------------

    (c-1) For an independent tank that has a portion of the tank 
protruding above the open deck, the fire exposure factor must be 
calculated for the surface area above the deck and the surface area 
below the deck, and this calculation must be specially approved by the 
Commandant (G-MSE).
    (d) In determining the total safety valve relieving capacity, the 
arrangement and location of the valves on the tank will be evaluated. 
The valves shall be placed so that a number of valves sufficient to 
provide the required relieving capacity shall always be in communication 
with the cargo vapor phase. The possible motions which the tank may see 
in its intended service and attendant changes in cargo liquid level will 
be considered. Shut off

[[Page 150]]

valves shall not be installed between the vessel and the safety relief 
valves. Manifolds for mounting multiple relief valves may be fitted with 
acceptable interlocking shut off valves so arranged that the required 
capacity of discharge will be ``lined up'' at all times.
    (e)(1) Each safety relief valve shall be tested in the presence of a 
marine inspector before being placed in service except as noted 
otherwise in paragraph (e)(2) of this section. The test shall 
satisfactorily show that the valve will start to discharge at the 
required minimum pressure.
    (2) Each safety relief valve fitted with a breaking pin and rupture 
disk need not be tested in the presence of a marine inspector before 
being placed in service. In lieu thereof, a certificate shall be 
furnished with the valve attested to by the manufacturer that the test 
requirements of paragraph (e)(1) of this section have been met.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 74-289, 44 FR 
26007, May 3, 1979; CGD 82-063b, 48 FR 4781, Feb. 3, 1983; CGD 95-072, 
60 FR 50462, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



                  Subpart 54.20--Fabrication by Welding



Sec. 54.20-1   Scope (modifies UW-1 through UW-65).

    (a) Pressure vessels and vessel parts that are fabricated by welding 
shall be as required by paragraphs UW-1 through UW-65 of section VIII of 
the ASME Code except as noted otherwise in this subchapter.



Sec. 54.20-2  Fabrication for hazardous materials (replaces (UW-2(a))).

    (a) Pressure vessels containing hazardous materials as defined in 
Sec. 150.115 of this chapter must be of the class and construction 
required by subchapter D, I, O, or, when not specified, of a class 
determined by the Commandant.
    (b) Class III pressure vessels must not be used for the storage or 
stowage of hazardous materials unless there is specific authorization in 
subchapters D, I, or O.

[CGD 77-147, 47 FR 21810, May 20, 1982]



Sec. 54.20-3   Design (modifies UW-9, UW-11(a), UW-13, and UW-16).

    (a) Fabrication by welding shall be in accordance with the 
provisions of this part and with part 57 of this subchapter.
    (b) Welding subject to UW-11(a) of the ASME Code shall be modified 
as described in Sec. 54.25-8 for radiographic examination.
    (c) A butt welded joint with one plate edge offset, as shown in 
Figure UW-13.1(k) of the ASME Code, may only be used for circumferential 
joints of Class II and Class III pressure vessels.
    (d) Attachment welds for nozzles and other connections shall be in 
accordance with UW-16 of the ASME Code. When nozzles or connections are 
made to pressure vessels, as shown in Figure UW-16.1 (a) and (c) of the 
ASME Code, and are welded from one side only, backing strips shall be 
used unless it can be determined visually that a full penetration weld 
has been achieved.
    (e) When fabricating by welding the minimum joint requirements shall 
be as specified under the column headed ``minimum joint requirements'' 
in Table 54.01-5(b) for various classes of pressure vessels.
    (f) Joints in Class II or III pressure vessel cargo tanks must meet 
the following:
    (1) Category A and B joints must be type (1) or (2).
    (2) Category C and D joints must have full penetration welds 
extending through the entire thickness of the vessel wall or nozzle 
wall.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 77-147, 47 FR 
21810, May 20, 1982; CGD 85-061, 54 FR 50964, Dec. 11, 1989]



Sec. 54.20-5   Welding qualification tests and production testing (modifies UW-26, UW-28, UW-29, UW-47, and UW-48).

    (a) Performance and procedure qualification. No production welding 
shall be done until welding procedures and welders have been qualified 
in accordance with part 57 of this subchapter.
    (b) Tests. Production tests are required in accordance with 
Sec. 57.06-1 of this subchapter.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970]

[[Page 151]]



                  Subpart 54.23--Fabrication by Brazing



Sec. 54.23-1   Scope (modifies UB-1).

    (a) Fabrication by brazing shall be in accordance with the 
provisions of this part and with part 57 of this subchapter.

[CGFR 69-127, 35 FR 9977, June 17, 1970]



 Subpart 54.25--Construction With Carbon, Alloy, and Heat Treated Steels



Sec. 54.25-1   Scope.

    (a) The carbon, alloy, and heat treated steels used in construction 
of pressure vessels and parts shall be as indicated in section VIII of 
the ASME Code except as noted otherwise in this subpart.



Sec. 54.25-3   Steel plates (modifies UCS-6).

    (a) The steels listed in UCS-6(b) and UCS-6(c) of the ASME Code will 
be allowed only in Class III pressure vessels (see Table 54.01-5(b)).



Sec. 54.25-5   Corrosion allowance (replaces UCS-25).

    (a) The corrosion allowance shall be as required in Sec. 54.01-35 in 
lieu of requirements in UCS-25 of the ASME Code.



Sec. 54.25-7   Requirement for postweld heat treatment (modifies UCS-56).

    (a) Postweld heat treatment is required for all carbon and low alloy 
steel Class I, I-L, and II-L vessels regardless of thickness. (Refer to 
Table 54.01-5(b) for applicable requirements.)
    (b) Cargo tanks which are fabricated of carbon or low alloy steel as 
Class II pressure vessels, designed for pressures exceeding 100 pounds 
per square inch gage and used in the storage or transportation of 
liquefied compressed gases shall be postweld heat treated regardless of 
thickness.

[CGFR 69-127, 35 FR 9977, June 17, 1970]



Sec. 54.25-8   Radiography (modifies UW-11(a), UCS-57, UNF-57, UHA-33, and UHT-57).

    (a) Full radiography is required for all Class I and Class I-L 
vessels regardless of thickness. (Refer to Table 54.01-5(b) for 
applicable requirements.)
    (b) Class II-L vessels shall be spot radiographed. The exemption 
provided in UW-11(c) of the ASME Code does not apply. (Refer to Table 
54.01-5(b) for applicable requirements.)
    (c) Each butt welded joint in a Class II or III pressure vessel 
cargo tank must be spot radiographed, in accordance with UW-52, 
regardless of diameter or thickness, and each weld intersection or 
crossing must be radiographed for a distance of at least 10 thicknesses 
from the intersection.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 85-061, 54 FR 
50964, Dec. 11, 1989]



Sec. 54.25-10   Low Temperature Operation--Ferritic Steels (replaces UCS-65 through UCS-67).

    (a) Scope. (1) This section contains requirements for pressure 
vessels and nonpressure vessel type tanks and associated secondary 
barrier, as defined in Sec. 38.05-4 and Sec. 154.7 of this chapter, and 
their parts constructed of carbon and alloy steels which are stressed at 
operating or hydrostatic test temperatures below 0 deg. F.
    (2) The service temperature is the minimum temperature of a product 
at which it may be contained, loaded and/or transported. However, the 
service temperature shall in no case be taken higher than given by the 
following formula:

                  ts=tw-0.25(tw-tB)

where:
ts=Service temperature.
tw=Boiling temperature of gas at normal working pressure of 
container but not higher than +32 deg. F.
tB=Boiling temperature of gas at atmospheric pressure.

Only temperatures due to refrigerated service usually need to be 
considered in determining the service temperature, except pressure 
vessel type cargo tanks operating at ambient temperatures must meet 
paragraph (d) of this section. ``Refrigerated service'', as used in this 
paragraph, means a service in which the temperature is controlled by the 
process and not by atmospheric conditions.
    (b) Specifications. Materials used in the construction of vessels to 
operate

[[Page 152]]

below 0 deg. F. (but not below the designated minimum service 
temperature) shall conform to a specification given in Table UCS-23 in 
the ASME Code and the following additional requirements:

    Note: For high alloy steels refer to Sec. 54.25-15. For heat treated 
steels refer to Sec. 54.25-20.

    (1)(i) For minimum service temperatures not lower than -67 deg. F., 
ferritic steels shall be made with fine grain practice and shall have an 
austenitic grain size of 5 or finer, and shall be normalized. 
Consideration will be given to other heat treatments. Refer to 
Sec. 57.03-1(d) of this subchapter. Plate for pressure vessel 
applications shall conform to the requirements of ASTM A-20. It may be 
produced by the open hearth, basic oxygen or electric furnace process 
and shall conform to the requirements of Table 54.25-10(b)(1). (Other 
alloying elements may only be present in trace amounts.)
    (ii) Mechanical properties shall be within the following limits:

Ultimate strength........................  --58,000\1\-85,000\1\ p.s.i. 
Yield strength...........................  --Minimum 35,000 p.s.i.      
                                           --Maximum 80 percent of      
                                            ultimate.                   
Elongation minimum.......................  --20 percent in 8 inches, or 
                                           --24 percent in 2 inches, or 
                                           --22 percent in 5.65         
                                            A, where ``A'' is  
                                            the test specimen cross     
                                            sectional area.             
                                                                        


                          Table 54.25-10(b)(1)                          
------------------------------------------------------------------------
                                                              Manganese 
     Minimum service\1\ temperature  deg.F       Max. C\1\     range\1\ 
                                                  percent      percent  
------------------------------------------------------------------------
-30...........................................         0.20    0.70-1.35
-50...........................................          .16    1.15-1.50
-67...........................................          .12   1.30-1.60 
------------------------------------------------------------------------
\1\At service temperatures intermediate between those specified,        
  intermediate amounts of carbon and manganese will be allowed (in      
  proportion to the actual service temperature variation from that      
  listed), provided all other chemical and mechanical properties        
  specified for steels in this temperature range are satisfied.         


                                                                        
                                                                 Range  
                                                                percent 
                                                                        
Si..........................................................   0.10-0.50
                                                                        
                                                                 Maximum
                                                                        
S...........................................................       0.035
P...........................................................       0.035
Ni..........................................................        0.80
Cr..........................................................        0.25
Mo..........................................................        0.08
Cu..........................................................       0.035
Nb..........................................................        0.05
V...........................................................        0.08
                                                                        

    (2) For minimum service temperature below -67 deg. F., but not below 
the designated minimum service temperature, ferritic steels shall be 
normalized, low carbon, fully killed, fine grain, nickel alloy type, 
conforming to any one of the specifications in Table 54.25-10(b)(2). 
Consideration will be given to other heat treatments. Refer to 
Sec. 57.03-1(d) of this subchapter for quenched and tempered steels. The 
ultimate and yield strengths shall be as shown in the applicable 
specification and shall be suitable to the design stress levels adopted. 
The service temperature shall not be colder than the minimum specified 
in Table 54.25-10(b)(2) for each steel.

                          Table 54.25-10(b)(2)                          
------------------------------------------------------------------------
                  Steel                     Minimum service temperature 
------------------------------------------------------------------------
A-203, 2\1/4\ percent, Ni, normalized....  -80 deg. F. for Grade A.     
                                           -75 deg. F. for Grade B.     
A-203, 3\1/2\ percent, Ni, normalized....  -130 deg. F. for Grade D.    
                                           -110 deg. F. for Grade E.    
5 percent Ni, normalized.................  Dependent on chemical and    
                                            physical properties.        
------------------------------------------------------------------------

    (3) The materials permitted under paragraphs (b) (1) and (2) of this 
section shall be tested for toughness in accordance with and shall 
satisfy the applicable requirements of subpart 54.05.
    (4) Welded pressure vessels or nonpressure vessel type tanks and 
associated secondary barriers, as defined in Sec. 38.05-4 of subchapter 
D (Tank Vessels) of this chapter shall meet the toughness requirements 
of subparts 57.03 and 57.06 of this subchapter with regard to weld 
procedure qualifications and production testing.
    (5) The material manufacturer's identification marking required by 
the material specification shall not be die-stamped on plate material 
less than one-fourth inch in thickness.
    (c) Design. Pressure vessels must meet the requirements for Class I-
L and II-L construction. (See Table 54.01-5(b) for applicable 
requirements). Except as permitted by Sec. 54.05-30, the allowable 
stress values used in the design of low temperature pressure vessels may 
not exceed those given in Table UCS-23 of the ASME Code for temperatures 
of 0 deg. F. to 650 deg. F. For materials not listed in this Table 
allowable stress values are determined in accordance with Appendix P of 
Section VIII of the ASME Code.

[[Page 153]]

    (d) Weldments and all materials used in pressure vessel type cargo 
tanks operating at ambient temperatures and constructed of materials 
listed in Table UCS-23 must pass Charpy impact tests in accordance with 
UG-84 at a temperature of -20  deg.F or colder, except as provided by 
paragraphs (d)(1), (d)(2), and (d)(3) of this section.
    (1) Charpy impact tests are not required for any of the following 
ASTM materials if the thickness for each is \5/8\ inch or less, unless 
otherwise indicated:
    (i) A-182, normalized and tempered.
    (ii) A-302, Grades C and D.
    (iii) A-336, Grades F21 and F22 that are normalized and tempered.
    (iv) A-387, Grades 21 and 22 that are normalized and tempered.
    (v) A-442, Grade 55 with a nominal thickness of 1'' or less.
    (vi) A-516, Grades 55 and 60.
    (vii) A-533, Grades B and C.
    (viii) All other plates, structural shapes and bars, and other 
product forms, except for bolting, if produced to a fine grain practice 
and normalized.
    (2) Charpy impact tests are not required for any of the following 
ASTM materials if the thickness for each is 1\1/4\ inch or less:
    (i) A-203.
    (ii) A-442, produced to a fine grain practice and normalized.
    (iii) A-508, Class 1.
    (iv) A-516, normalized.
    (v) A-524.
    (vi) A-537.
    (vii) A-612, normalized.
    (viii) A-662, normalized.
    (ix) A-724, normalized.
    (3) Charpy impact tests are not required for any of the following 
bolt materials:
    (i) A-193, Grades B5, B7, B7M, and B16.
    (ii) A-307, Grade B
    (iii) A-325, Type 1.
    (iv) A-449.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9977, June 17, 1970; CGD 73-133R, 39 FR 9178, Mar. 8, 1974; CGD 74-
289, 44 FR 26007, May 3, 1979; CGD 77-069, 52 FR 31626, Aug. 21, 1987; 
CGD 85-061, 54 FR 50964, Dec. 11, 1989]



Sec. 54.25-15   Low temperature operation--high alloy steels (modifies UHA-23(b) and UHA-51).

    (a) Toughness tests for the materials listed in UHA-51(a) of the 
ASME Code for service temperatures below -425 deg. F., UHA-51(b)(1) 
through (5) for service temperatures below 0 deg. F., and UHA-51(c) for 
all service temperatures, shall be performed in accordance with the 
requirements of subpart 54.05. These requirements are also applicable to 
nonpressure vessel type, low temperature tanks and associated secondary 
barriers, as defined in Sec. 38.05-4 in subchapter D (Tank Vessels) of 
this chapter. Such tests are required regardless of the vessel's design 
stress. Service temperature is defined in Sec. 54.25-10(a)(2).
    (b) Materials for pressure vessels with service temperatures below 
-320 deg. F. shall be of the stabilized or low carbon (less than 0.10 
percent) austenitic stainless steel type, produced according to the 
applicable specifications of Table UHA-23 of the ASME Code. These 
materials and their weldments shall be tested for toughness according to 
the requirements of subpart 54.05 except that the Charpy V-notch testing 
acceptance criteria will be in accordance with UHT-6(a)(4) and (5) of 
the ASME Code.''
    (c) Except as permitted by Sec. 54.05-30, the allowable stress 
values used in the design of low temperature pressure vessels may not 
exceed those given in Table UHA-23 of the ASME Code for temperatures of 
-20 deg. F. to 100 deg. F.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 73-133R, 39 
FR 9178, Mar. 8, 1974; CGD 73-254, 40 FR 40164, Sept. 2, 1975]



Sec. 54.25-20   Low temperature operation--ferritic steels with properties enhanced by heat treatment (modifies UHT-5(c), UHT-6, UHT-23, and UHT-82).

    (a) For service temperatures below 0 deg. F. but not below the 
designated minimum service temperature, steel conforming to the 
specifications of Table 54.25-20(a) may be used in the fabrication of 
pressure vessels and nonpressure vessel tanks and associated secondary 
barriers, as defined in Sec. 38.05-4 of subchapter D (Tank Vessels) of 
this chapter. The ultimate and yield

[[Page 154]]

strengths shall be as shown in the applicable specification and shall be 
suitable for the design stress levels adopted. The service temperature 
shall not be colder than -320 deg. F. Service temperature is defined in 
Sec. 54.25-10(a) (2).

                            Table 54.25-20(a)                           
------------------------------------------------------------------------
                                                               Minimum  
                                                               service  
                           Steel                            temperature,
                                                                deg.F.  
------------------------------------------------------------------------
A-333, 9 percent Ni, grade 8..............................         -320 
A-334, 9 percent Ni, grade 8..............................         -320 
A-353, 9 percent Ni, double normalized and tempered.......         -320 
A-522, 9 percent Ni, NNT, Q and T, forging................         -320 
A-553, 9 percent Ni, quenched and tempered................         -320 
------------------------------------------------------------------------

    (b) The materials permitted under paragraph (a) of this section 
shall be tested for toughness in accordance with the requirements of 
UHT-6 of the ASME Code except that tests shall be conducted at the 
temperature specified in Sec. 54.05-6 in lieu of that in UHT-5(c) of the 
ASME Code. Lateral expansion in a broken Charpy V-notch specimen is 
illustrated in Figure 54.25-20(b) and shall be measured in accordance 
with the procedure outlined in ASTM A-370.
[GRAPHIC] [TIFF OMITTED] TC01FE91.023


[[Page 155]]


    (c) The qualification of welding procedures and welders and weld 
production testing for the steels of Table 54.25-20(a) shall conform to 
the requirements of part 57 of this subchapter and subpart 54.05 except 
that the Charpy V-notch testing acceptance criteria shall be in 
accordance with UHT-6(a) (4) and (5) of the ASME Code.
    (d) The values of absorbed energy in foot-pounds and of fracture 
appearance in percentage shear, which are recorded for information when 
complying with paragraphs (b) and (c) of this section shall also be 
reported to the marine inspector or the Commandant, as applicable.
    (e) Except as permitted by Sec. 54.05-30, the allowable stress 
values may not exceed those given in Table UHT-23 of the ASME Code for 
temperatures of 150 deg. F. and below.

[CGFR 68-82, 33 FR 18828, Dec. 18, 1968, as amended by CGD 73-133R, 39 
FR 9179, Mar. 8, 1974]



Sec. 54.25-25   Welding of quenched and tempered steels (modified UHT-82).

    (a) The welding requirements in UHT-82 of the ASME Code shall be 
modified to require that the qualification of welding procedures and 
welders and weld production testing shall conform to the requirements of 
part 57 of this subchapter. The requirements are Sec. 57.03-1(d) of this 
subchapter are applicable to welded pressure vessels and nonpressure 
vessel type tanks of quenched and tempered steels other than 9 percent 
nickel.



                 Subpart 54.30--Mechanical Stress Relief



Sec. 54.30-1   Scope.

    (a) Certain pressure vessels may be mechanically stress relieved in 
accordance with the requirements in this subpart.



Sec. 54.30-3   Introduction.

    (a) Large conventional pressure vessels used to transport liquefied 
petroleum and natural gases, at ``low temperatures'' may often be 
difficult to thermally stress relieve. Where no other problem, such as 
corrosion exists, mechanical stress relief will be permitted for Class 
II-L pressure vessels.
    (b) Mechanical stress relief serves to cause small flaws, 
particularly in the weld zone, to yield plastically at the flaw tip 
resulting in a local relief of stress and a blunting of the crack tip. 
To achieve the maximum benefit from mechanical stress relief, it is 
necessary that the stresses so imposed be more severe than those 
expected in normal service life. At the same time, it is necessary that 
the stresses which are imposed are not so high as to result in 
appreciable deformation or general yielding.
    (c) The weld joint efficiencies as listed in Table UW-12 of the ASME 
Code shall apply except that a minimum of spot radiography will be 
required. UW-12(c) of the ASME Code which permits omitting all 
radiography does not apply. Spot examination shall follow UW-52 of the 
ASME Code and in addition these vessels will be required to have 
radiographic examination of intersecting circumferential and 
longitudinal joints for a distance of at least 20 times the plate 
thickness from the junction. See Sec. 54.20-10 on spot radiography.
    (d) Severe cold forming will not be permitted unless thermal stress 
relief is used. For example, parts of the vessels which are individually 
cold formed, such as heads, must be thermally stress relieved, where the 
extreme fiber strain measured at the surface exceeds 5 percent as 
determined by:

            Percent strain=(65t/Rf)[1-(Rf/Ro)]

where:
t=Plate thickness.
Rf=Final radius.
Ro=Original radius (equals infinity for flat plate).



Sec. 54.30-5   Limitations and requirements.

    (a) Class II-L pressure vessels which require stress relief (see 
Table 54.01-5(b)) may be mechanically stress relieved provided:
    (1) The steels from which they are fabricated do not specifically 
require thermal stress relief in UCS-56 of the ASME Code and have a 
ratio of yield to ultimate tensile strength not greater

[[Page 156]]

than 0.8. For example: A-537 steels could be mechanically stress 
relieved.
    (2) Pressure difference across the shell is not greater than 100 
pounds per square inch, thickness of shell is not greater than 1 inch, 
and the design temperature is not greater than 115 deg. F.
    (3) It will carry liquids of specific gravity no greater than 1.05.
    (4) Design details are sufficient to eliminate stress concentrators: 
Mechanical stress relief is not acceptable in designs involving the 
following types of welded connections shown in UW-16.1 of the ASME Code:
    (i) Types l, m, n, and p because of nonintegral reinforcement. Type 
o will be acceptable provided the plate, nozzle, and reinforcement 
assembly are furnace stress relieved and the reinforcement is at least 6 
inches or 10t, whichever is larger, from the plate head.
    (ii) Types d, e, and f because expansion and contraction stresses 
are concentrated at the junction points.
    (5) That no slip-on flanges in sizes greater than 2 inches are used.
    (6) The categories A and B joints are type one as described in Table 
UW-12 of the ASME Code and all categories C and D joints are full 
penetration welds. See UW-3 of the ASME Code for definition of 
categories.
    (b) When a pressure vessel is to be mechanically stress relieved in 
accordance with Sec. 54.30-10(a)(1), its maximum allowable working 
pressure will be 40 percent of the value which would otherwise be 
determined. However, an increase of this 40 percent factor may be 
permitted if the stress relief is carried out at a pressure higher than 
that required by Sec. 54.30-10(a)(1) and an experimental strain analysis 
is carried out during stress relief. This evaluation should provide 
information as to the strains at the saddles, welded seams and nozzles 
as well as the body of the vessel. The hydrostatic pressure applied 
during stress relief should be such that, except in the case of welds, 
the stresses in the vessel shall closely approach but not exceed 90 
percent of the yield stress of the material at the test temperature. The 
proposed experimental program should be submitted to the Commandant for 
approval prior to its use. Photo-elastic coating, strain gaging, or a 
brittle coating technique is suggested for the experimental analysis.



Sec. 54.30-10   Method of performing mechanical stress relief.

    (a) The mechanical stress relief shall be carried out in accordance 
with the following stipulations using water as the pressurizing medium:
    (1) At a hydrostatic pressure (measured at the tank top) of 1\1/2\ 
times the design pressure. (See UA-60(e) of the ASME Code.)
    (2) At a temperature of 70 deg. F. or the service temperature plus 
50 deg. F., whichever is higher. Where the ambient temperature is below 
70 deg. F., and use of water at that temperature is not practical, the 
minimum temperature for mechanical stress relief may be below 70 deg. F. 
but shall not be less than 50 deg. F. above service temperature.
    (3) The stress relief shall be at the required temperature and 
pressure and held for a period not less than 2 hours per inch of metal 
thickness, but in no case less than 2 hours.
    (b) It is considered preferable that mechanical stress relief be 
accomplished with the tanks in place on their saddles or supporting 
structure in the barge or ship in which they will be utilized. In any 
case, it is considered mandatory that the tank be supported only by its 
regular saddles or supporting structure, without any auxiliary or 
temporary supports.



Sec. 54.30-15   Requirement for analysis and computation.

    (a) A stress analysis shall be performed to determine if the tank 
may be exposed to excessive loadings during the mechanical stress relief 
process. This analysis should include consideration of the local 
stresses in way of saddles or other supporting structure and additional 
bending stresses due to the weight of the pressurizing liquid 
particularly in areas of high stress concentration. While it is 
necessary that the general stress level during the process be in excess 
of the normal working level, the calculated maximum stress during test 
shall not exceed 90 percent of the yield strength of the material at 
test temperature. The

[[Page 157]]

supporting structure shall be analyzed to verify its adequacy.
    (b) In all cases where the tanks are mechanically stress relieved in 
place in the ship or barge and the tanks are designed to carry cargoes 
with a specific gravity less than 1.05, the ship or barge shall be shown 
to have adequate stability and buoyancy, as well as strength to carry 
the excess weight of the tank during the stress relief procedure.



PART 56--PIPING SYSTEMS AND APPURTENANCES--Table of Contents




                         Subpart 56.01--General

Sec.
56.01-1  Scope (replaces 100.1).
56.01-2  Incorporation by reference.
56.01-3  Power boiler external piping (Replaces 100.1.1, 100.1.2, 111.6, 
          122.1, 132 and 133).
56.01-5  Adoption of ANSI (American National Standards Institute) Code 
          B31.1 for pressure and power piping, and other standards.
56.01-10  Plan approval.

                  Subpart 56.04--Piping Classification

56.04-1  Scope.
56.04-2  Piping classification according to service.
56.04-10  Other systems.

                          Subpart 56.07--Design

56.07-5  Definitions (modifies 100.2).
56.07-10  Design conditions and criteria (modifies 101--104.7).

                        Subpart 56.10--Components

56.10-1  Selection and limitations of piping components (replaces 105 
          through 108).
56.10-5  Pipe.

                         Subpart 56.15--Fittings

56.15-1  Pipe joining fittings.
56.15-5  Fluid-conditioner fittings.
56.15-10  Special purpose fittings.

                          Subpart 56.20--Valves

56.20-1  General.
56.20-5  Marking (reproduces 107.2).
56.20-7  Ends.
56.20-9  Valve construction.
56.20-15  Valves employing resilient material.
56.20-20  Valve bypasses.

   Subpart 56.25--Pipe Flanges, Blanks, Flange Facings, Gaskets, and 
                                 Bolting

56.25-5  Flanges.
56.25-7  Blanks.
56.25-10  Flange facings.
56.25-15  Gaskets (reproduces 108.4).
56.25-20  Bolting.

        Subpart 56.30--Selection and Limitations of Piping Joints

56.30-1  Scope (replaces 110 through 118).
56.30-3  Piping joints (reproduces 110).
56.30-5  Welded joints.
56.30-10  Flanged joints (modifies 104.5.1 (a)).
56.30-15  Expanded or rolled joints.
56.30-20  Threaded joints.
56.30-25  Flared, flareless, and compression fittings.
56.30-27  Caulked joints.
56.30-30  Brazed joints.
56.30-35  Gasketed mechanical couplings.
56.30-40  Flexible pipe couplings of the compression or slip-on type.

           Subpart 56.35--Expansion, Flexibility and Supports

56.35-1  Pipe stress calculations (replaces 119.7).
56.35-10  Nonmetallic expansion joints (replaces 119.5.1).
56.35-15  Metallic expansion joints (replaces 119.5.1).

    Subpart 56.50--Design Requirements Pertaining to Specific Systems

56.50-1  General (replaces 122.6 through 122.10).
56.50-10  Special gaging requirements.
56.50-15  Steam and exhaust piping.
56.50-20  Pressure relief piping.
56.50-25  Safety and relief valve escape piping.
56.50-30  Boiler feed piping.
56.50-35  Condensate pumps.
56.50-40  Blowoff piping (replaces 102.2.5 (d)).
56.50-45  Circulating pumps.
56.50-50  Bilge and ballast piping.
56.50-55  Bilge pumps.
56.50-57  Bilge piping and pumps, alternative requirements.
56.50-60  Systems containing oil.
56.50-65  Burner fuel-oil service systems.
56.50-70  Gasoline fuel systems.
56.50-75  Diesel fuel systems.
56.50-80  Lubricating-oil systems.
56.50-85  Tank-vent piping.
56.50-90  Sounding devices.
56.50-95  Overboard discharges and shell connections.
56.50-96  Keel cooler installations.
56.50-97  Instrument, control and sampling piping (modifies 122.3).
56.50-105  Low-temperature piping.

[[Page 158]]

56.50-110  Diving support systems.

                        Subpart 56.60--Materials

56.60-1  Acceptable materials and specifications (replaces 123 and Table 
          126.1 in ANSI-B31.1).
56.60-2  Limitations on materials.
56.60-3  Ferrous materials.
56.60-5  Steel (High temperature applications).
56.60-10  Cast iron and malleable iron.
56.60-15  Ductile iron.
56.60-20  Nonferrous materials.
56.60-25  Nonmetallic materials.

            Subpart 56.65--Fabrication, Assembly and Erection

56.65-1  General (replaces 127 through 135.4).

                         Subpart 56.70--Welding

56.70-1  General.
56.70-3  Limitations.
56.70-5  Material.
56.70-10  Preparation (modifies 127.3).
56.70-15  Procedure.
56.70-20  Qualification, general.

                         Subpart 56.75--Brazing

56.75-5  Filler metal.
56.75-10  Joint clearance (reproduces 128.2.2).
56.75-15  Heating (reproduces 128.2.3).
56.75-20  Brazing qualification.
56.75-25  Detail requirements.
56.75-30  Pipe joining details.

                   Subpart 56.80--Bending and Forming

56.80-5  Bending.
56.80-10  Forming (reproduces 129.2).
56.80-15  Heat treatment of bends and formed components.

                 Subpart 56.85--Heat Treatment of Welds

56.85-5  Heating and cooling method (reproduces 131.1).
56.85-10  Preheating.
56.85-15  Postheat treatment.

                         Subpart 56.90--Assembly

56.90-1  General.
56.90-5  Bolting procedure.
56.90-10  Threaded piping (reproduces 135.4).

                        Subpart 56.95--Inspection

56.95-1  General (replaces 136).
56.95-5  Rights of access of marine inspectors.
56.95-10  Type and extent of examination required.

                      Subpart 56.97--Pressure Tests

56.97-1  General (replaces 137).
56.97-5  Pressure testing of nonstandard piping system components.
56.97-25  Preparation for testing (Reproduces 137.3).
56.97-30  Hydrostatic tests (Reproduces 137.4).
56.97-35  Pneumatic tests (Replaces 137.5).
56.97-38  Initial service leak test (Reproduces 137.7).
56.97-40  Installation tests.

    Authority: 33 U.S.C. 1321(j), 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 
3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 
FR 54757, 3 CFR, 1991 Comp., p. 351; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18843, Dec. 18, 1968, unless otherwise 
noted.



                         Subpart 56.01--General

    Note: See Sec. 50.15-10 for general adoption of standards of the 
ANSI (American National Standards Institute). The printing of portions 
of the ``American National Standard Code for Pressure Piping, Power 
Piping,'' ANSI-B31.1, is with the permission of the publisher, The 
American Society of Mechanical Engineers, United Engineering Center, 345 
East 47th Street, New York, N.Y. 10017. The adoption of this standard 
ANSI-B31.1 for pressure piping and power piping is subject to specific 
limitations or modifications as described in this part. Those 
requirements in ANSI-B31.1 which are not referred to in this part are 
adopted without change. Table 56.01-5(a) sets forth a general reference 
to various paragraphs in ANSI-B31.1 which are limited, modified, or 
replaced by regulations in this part.



Sec. 56.01-1   Scope (replaces 100.1).

    (a) This part contains requirements for the various ships' and 
barges' piping systems and appurtenances.
    (b) The respective piping systems installed on ships and barges 
shall have the necessary pumps, valves, regulation valves, safety 
valves, relief valves, flanges, fittings, pressure gages, liquid level 
indicators, thermometers, etc., for safe and efficient operation of the 
vessel.
    (c) Piping for industrial systems on mobile offshore drilling units 
need not fully comply with the requirements of

[[Page 159]]

this part but must meet Subpart 58.60 of this subchapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56799, Dec. 4, 1978]



Sec. 56.01-2  Incorporation by reference.

    (a) Certain standards and specifications are incorporated by 
reference into this part with the approval of the Director of the 
Federal Register in accordance with 5 U.S.C. 552(a). To enforce any 
edition other than the one listed in paragraph (b) of this section, 
notice of the change must be published in the Federal Register and the 
material made available to the public. All approved material is on file 
at the Office of the Federal Register, 800 North Capitol Street, NW., 
suite 700, Washington, DC, and is available from the sources indicated 
in paragraph (b).
    (b) The standards and specifications approved for incorporation by 
reference in this part, and the sections affected are:

American National Standards Institute                                   
 (ANSI); 11 West 42nd Street, New York,                                 
 NY 10036:                                                              
    ANSI B1.1-82 Unified Inch Screw      56.60-1; 56.25-20              
     Threads (UN and UNR Thread Form).                                  
    ANSI B1.20.1-83 Pipe Threads,        56.60-1                        
     General Purpose (Inch).                                            
    ANSI B1.20.3-76 (reaffirmed 1982)    56.60-1                        
     Dryseal Pipe Threads (Inch).                                       
    ANSI B16.1-75 Cast Iron Flanges and  56.60-1; 56.60-10              
     Flanged Fittings, Class 25, 125,                                   
     250 and 800.                                                       
    ANSI B16.3-85 Malleable Iron         56.60-1                        
     Threaded Fittings, Classes 150 and                                 
     300.                                                               
    ANSI B16.4-85 Cast Iron Threaded     56.60-1                        
     Fittings, Classes 125 and 250.                                     
    ANSI B16.5-81 Pipe Flanges and       56.25-20;                      
     Flanged Fittings.                   56.30-10; 56.60-1              
    ANSI B16.9-86 Factory-Made Wrought   56.60-1                        
     Steel Buttwelding Fittings.                                        
    ANSI B16.10-86 Face-to-Face and End- 56.60-1                        
     to-End Dimensions of Ferrous                                       
     Valves.                                                            
    ANSI B16.11-80 Forged Steel          56.30-5; 56.60-1               
     Fittings, Socket-Welding and                                       
     Threaded.                                                          
    ANSI B16.14-83 Ferrous Pipe Plugs,   56.60-1                        
     Bushings, and Locknuts with Pipe                                   
     Threads.                                                           
    ANSI B16.15-85 Cast Bronze Threaded  56.60-1                        
     Fittings, Classes 125 and 250.                                     
    ANSI B16.18-84 Cast Copper Alloy     56.60-1                        
     Solder Joint Pressure Fittings.                                    
    ANSI B16.20-73 Ring-Joint Gaskets    56.15-1; 56.15-5;              
     and Grooves for Steel Pipe          56.15-10; 56.25-5;             
     Flantion VIII, Division 1,          56.30-10; 56.30-30;            
     Pressure Vessels, 1986 with         56.60-15; 56.60-1;             
     addenda.                            56.95-10                       
        Section IX, Welding and Brazing  56.70-5; 56.70-20;             
         Qualifications, 1986 with       56.75-20; 56.0-1               
         addenda.                                                       
    ANSI B16.24-79 Bronze Pipe Flanges   56.60-1                        
     and Flanged Fittings, Class 150                                    
     and 300.                                                           
    ANSI B16.25-86 Buttwelding Ends....  56.60-1; 56.30-5;              
                                         56.70-10                       
    ANSI B16.28-86 Wrought Steel         56.60-1                        
     Buttwelding Short Radius Elbows                                    
     and Returns.                                                       
    ANSI B16.29-86 Wrought Copper and    56.60-1                        
     Wrought Copper Alloy Solder Joint                                  
     Drainage Fittings--DWV.                                            
    ANSI B16.34-88 Valves-Flanged,       56.20-1; 56.60-1               
     Threaded and Welding End.                                          
    ANSI B16.42-87 Ductile Iron Pipe     56.60-1                        
     Flanges and Flanged Fittings,                                      
     Classes 150 and 300.                                               
    ANSI B18.2.1-81 Square and Hex       56.25-20; 56.60-1              
     Bolts and Screws, Inch Series.                                     
    ANSI B18.2.2-87 Square and Hex Nuts  56.25-20; 56.60-1              

[[Page 160]]

                                                                        
    ANSI B31.1-86 Power Piping.........  56.01-5                        
    ANSI B36.10M-85 Welded and Seamless  56.07-5; 56.30-20;             
     Wrought Steel Pipe.                 56.60-1                        
    ANSI B36.19M-85 Stainless Steel      56.07-5; 56.60-1               
     Pipe.                                                              
American Society of Mechanical                                          
 Engineers (ASME): United Engineering                                   
 Center, 345 East 47th Street, New                                      
 York, NY 10017:                                                        
    Boiler and Pressure Vessel Code:                                    
        Section I, Power Boilers, 1986   56.15-5; 56.15-10;             
         with addenda.                   56.60-1; 56.60-1;              
                                         56.70-15; 56.95-10             
                                         56.15-1                        
        Section VIII, Division 1,        56.15-1; 56.15-5;              
         Pressure Vessels, 1986 with     56.15-10; 56.25-5;             
         addenda.                        56.30-10; 56.30-30;            
                                         56.60-15; 56.60-1;             
                                         56.95-10                       
        Section IX, Welding and Brazing  56.70-5; 56.70-20;             
         Qualifications, 1986 with       56.75-20; 56.85-10             
         addenda.                                                       
American Society for Testing and                                        
 Materials (ASTM), 1916 Race Street,                                    
 Philadelphia, PA 19103:                                                
    ASTM A 36-84a Structural Steel.....  56.30-10                       
    ASTM A 47-84 Malleable Iron          56.60-1                        
     Castings.                                                          
    ASTM A 53-84a Pipe, Steel, Black     56.10-5                        
     and Hot-Dipped, Zinc-Coated,        56.60-1                        
     Welded and Seamless.                                               
    ASTM A 106-84a Seamless Carbon       56.60-1                        
     Steel Pipe for High-Temperature                                    
     Service.                                                           
    ASTM A 126-84 Gray Iron Castings     56.60-1                        
     for Valves, Flanges, and Pipe                                      
     Fittings.                                                          
    ASTM A 134-80 Pipe, Steel, Electric- 56.60-1                        
     Fusion (ARC)-Welded (Sizes NPS 16                                  
     and over.).                                                        
    ASTM A 135-84 Electric-Resistance-   56.60-1                        
     Welded Steel Pipe.                                                 
    ASTM A 139-84 Electric-Fusion (Arc)- 56.60-1                        
     Welded Steel Pipe (Sizes 4 in. and                                 
     over).                                                             
    ASTM A 178-84a Electric-Resistance-  56.60-1                        
     Welded Carbon Steel Boiler Tubes.                                  
    ASTM A 179-84 Seamless Cold-Drawn    56.60-1                        
     Low-Carbon Steel Heat-Exchanger                                    
     and Condenser Tubes.                                               
    ASTM A 182-84c Forged or Rolled      56.50-105                      
     Alloy-Steel Pipe Flanges, Forged                                   
     Fittings, and Valves and Parts for                                 
     High-Temperature Service.                                          
    ASTM A 192-84a Seamless Carbon       56.60-1                        
     Steel Boiler Tubes for High-                                       
     Pressure Service.                                                  
    ASTM A 194-84a Carbon and Alloy      56.50-105                      
     Steel Nuts for Bolts for High-                                     
     Pressure and High-Temperature                                      
     Service.                                                           
    ASTM A 197-79 Cupola Malleable Iron  56.60-1                        
    ASTM A 199-84 Seamless Cold-Drawn    56.60-1                        
     Intermediate Alloy-Steel Heat-                                     
     Exchanger and Condenser Tubes.                                     
    ASTM A 210-84a Seamless Medium-      56.60-1                        
     Carbon Steel Boiler and                                            
     Superheater Tubes.                                                 
    ASTM A 213-84b Seamless Ferritic     56.60-1                        
     and Austenitic Alloy-Steel Boiler,                                 
     Superheater, and Heat-Exchanger                                    
     Tubes.                                                             
    ASTM A 214-84a Electric-Resistance-  56.60-1                        
     Welded Carbon Steel Heat-Exchanger                                 
     and Condenser Tubes.                                               
    ASTM A 226-84a Electric-Resistance-  56.60-1                        
     Welded Carbon Steel Boiler and                                     
     Superheater Tubes for High-                                        
     Pressure Service.                                                  

[[Page 161]]

                                                                        
    ASTM A 234-84a Piping Fittings of    56.60-1                        
     Wrought Carbon Steel and Alloy                                     
     Steel for Moderate and Elevated                                    
     Temperatures.                                                      
    ASTM A 249-84b Welded Austenitic     56.60-1                        
     Steel Boiler, Superheater, Heat-                                   
     Exchanger, and Condenser Tubes.                                    
    ASTM A 268-84a Seamless and Welded   56.60-1                        
     Ferritic Stainless Steel Tubing                                    
     for General Service.                                               
    ASTM A 276-84a Stainless and Heat-   56.60-2                        
     Resisting Steel Bars and Shapes.                                   
    ASTM A 307-84 Carbon Steel           56.25-20                       
     Externally Threaded Standard                                       
     Fasteners.                                                         
    ASTM A 312-84c Seamless and Welded   56.50-105; 56.60-1             
     Austenitic Stainless Steel Pipe.                                   
    ASTM A 320-84a Alloy-Steel Bolting   56.50-105                      
     Materials for Low-Temperature                                      
     Service.                                                           
    ASTM A 333-84b Seamless and Welded   56.50-105; 56.60-1             
     Steel Pipe for Low-Temperature                                     
     Service.                                                           
    ASTM A 334-84b Seamless and Welded   56.50-105; 56.60-1             
     Carbon and Alloy-Steel Tubes for                                   
     Low Temperature Service.                                           
    ASTM A 335-84a Seamless Ferritic     56.60-1                        
     Alloy Steel Pipe for High-                                         
     Temperature Service.                                               
    ASTM A 350-84a Forgings, Carbon and  56.50-105                      
     Low-Alloy Steel, Requiring Notch                                   
     Toughness Testing for Piping                                       
     Components.                                                        
    ASTM A 351-84a Steel Castings,       56.50-105                      
     Austenitic, for High-Temperature                                   
     Service.                                                           
    ASTM A 352-84a Steel Castings,       56.50-105                      
     Ferritic and Martensitic, for                                      
     Pressure-Containing Parts Suitable                                 
     for Low-Temperature Service.                                       
    ASTM A 358-84b Electric-Fusion-      56.60-1                        
     Welded Austenitic Chromium-Nickel                                  
     Alloy Steel Pipe for High-                                         
     Temperature Service.                                               
    ASTM A 369-84 Carbon and Ferric      56.60-1                        
     Alloy Steel Forged and Bored Pipe                                  
     for High Temperature Service.                                      
    ASTM A 376-84 Seamless Austenitic    56.07-10; 56.60-1;             
     Steel Pipe for High-Temperature     56.60-2                        
     Central-Station Service.                                           
    ASTM A 395-80 Ferritic Ductile Iron  56.60-1; 56.50-60;             
     Pressure-Retaining Castings for     56.60-15                       
     Use at Elevated Temperatures.                                      
    ASTM A 403-84a Wrought Austenitic    56.60-1                        
     Stainless Steel Piping Fittings.                                   
    ASTM A 420-84 Piping Fittings of     56.50-105; 56.60-1             
     Wrought Carbon Steel and Alloy                                     
     Steel for Low-Temperature Service.                                 
    ASTM A 430-84a Austenitic Steel,     56.60-1                        
     Forged and Bored Pipe for High-                                    
     Temperature Service.                                               
    ASTM A 520-72 Supplementary          56.60-1                        
     Requirements for Seamless and                                      
     Electrical-Resistance-Welded                                       
     Carbon Steel Tubular Products for                                  
     High-Temperature Service                                           
     Conforming to ISO Recommendations                                  
     for Boiler Construction.                                           

[[Page 162]]

                                                                        
    ASTM A 522-81 Forged or Rolled 8     56.50-105                      
     and 9% Nickel Alloy Steel Flanges,                                 
     Fittings, Valves, and Parts for                                    
     Low-Temperature Service.                                           
    ASTM A 575-81 Steel Bars, Carbon,    56.60-2                        
     Merchant Quality, M-Grades.                                        
    ASTM A 576-81 Steel Bars, Carbon,    56.60-2                        
     Hot-Wrought, Special Quality.                                      
    ASTM B 16-85 Free-Cutting Brass      56.60-2                        
     Rod, Bar, and Screw Machines.                                      
    ASTM B 21-83b Naval Brass Rod, Bar,  56.60-2                        
     and Shapes.                                                        
    ASTM B 26-84 Aluminum-Alloy Sand     56.60-2                        
     Castings.                                                          
    ASTM B 42-84 Seamless Copper Pipe,   56.60-1                        
     Standard Sizes.                                                    
    ASTM B 43-84 Seamless Red Brass      56.60-1                        
     Pipe, Standard Sizes.                                              
    ASTM B 68-83 Seamless Copper Tube,   56.60-1                        
     Bright Annealed.                                                   
    ASTM B 75-84 Seamless Copper Tube..  56.60-1                        
    ASTM B 85-84 Aluminum-Alloy Die      56.60-2                        
     Castings.                                                          
    ASTM B 88-83a Seamless Copper Water  56.60-1                        
     Tube.                                                              
    ASTM B 96-84a Copper Silicon Alloy   56.60-2                        
     Plate and Sheet, Strip, and Rolled                                 
     Bar for General Purposes and                                       
     Pressure Vessels.                                                  
    ASTM B 111-85 Copper and Copper-     56.60-1                        
     Alloy Seamless Condenser Tubes and                                 
     Ferrule Stock.                                                     
    ASTM B 124-84 Copper and Copper-     56.60-2                        
     Alloy Forging Rod, Bar, and Shapes.                                
    ASTM B 154-82 Mercurous Nitrate      56.60-2                        
     Test for Copper and Copper Alloys.                                 
    ASTM B 161-81 Nickel Seamless Pipe   56.60-1                        
     and Tube.                                                          
    ASTM B 165-81 Nickel-Copper Alloy    56.60-1                        
     (UNS N04400) Seamless Pipe and                                     
     Tube.                                                              
    ASTM B 167-80 Nickel-Chromium-Iron   56.60-1                        
     Alloy (UNS N06600-N06690) Seamless                                 
     Pipe and Tube.                                                     
    ASTM B 171-85a Copper-Alloy          56.60-2                        
     Condenser Tube Plates.                                             
    ASTM B 210-82a Aluminum-Alloy Drawn  56.60-1                        
     Seamless Tubes.                                                    
    ASTM B 234-85 Aluminum-Alloy Drawn   56.60-1                        
     Seamless Tubes for Condensers and                                  
     Heat Exchangers.                                                   
    ASTM B 241-83a Aluminum-Alloy        56.60-1                        
     Seamless Pipe and Seamless                                         
     Extruded Tube.                                                     
    ASTM B 280-83 Seamless Copper Tube   56.60-1                        
     for Air Conditioning and                                           
     Refrigeration Field Service.                                       
    ASTM B 283-83b Copper and Copper-    56.60-2                        
     Alloy Die Forgings (Hot-Pressed).                                  
    ASTM B 315-85 Seamless Copper-Alloy  56.60-1                        
     Pipe and Tube.                                                     
    ASTM B 361-81 Factory-Made Wrought   56.60-1                        
     Aluminum and Aluminum-Alloy                                        
     Welding Fittings.                                                  
    ASTM D 635-81 Rate of Burning and/   56.60-25                       
     or Extent and Time of Burning of                                   
     Self-Supporting Plastics in a                                      
     Horizontal Position.                                               
    ASTM D 1785-83 Poly(Vinyl            56.60-25                       
     Chloride)(PVC) Plastic Pipe,                                       
     Schedules 40, 80, and 120.                                         
    ASTM D 2241-84 Poly(Vinyl Chloride)  56.60-25                       
     (PVC) Pressure-Rated Pipe (SDR-                                    
     Series).                                                           
    ASTM D 2464-76 Threaded Poly(Vinyl   56.60-25                       
     Chloride) (PVC) Plastic Pipe                                       
     Fittings, Schedule 80.                                             

[[Page 163]]

                                                                        
    ASTM D 2466-78 Poly(Vinyl Chloride)  56.60-25                       
     (PVC) Plastic Pipe Fittings,                                       
     Schedule 40.                                                       
    ASTM D 2467-76a Socket-Type          56.60-25                       
     Poly(Vinyl Chloride)(PVC) Plastic                                  
     Pipe Fittings, Schedule 80.                                        
    ASTM D 2665-82 Poly(Vinyl Chloride)  56.60-25                       
     (PVC) Plastic Drain, Waste, and                                    
     Vent Pipe and Fittings.                                            
    ASTM D 2863-77 Measuring the         56.60-25                       
     Minimum Oxygen Concentration to                                    
     Support Candle-Like Combustion of                                  
     Plastics (Oxygen Index).                                           
    ASTM E 23-82 Notched Bar Impact      56.50-105                      
     Testing of Metallic Materials.                                     
    ASTM F 682-82a Wrought Carbon Steel  56.60-1                        
     Sleeve-Type Pipe Couplings.                                        
    ASTM F 1006-86 Entrainment           56.60-1                        
     Separators for Use in Marine                                       
     Piping Applications.                                               
    ASTM F 1007-86 Pipe-Line Expansion   56.60-1                        
     Joints of the Packed Slip Type for                                 
     Marine Application.                                                
    ASTM F 1020-86 Line-Blind Valves     56.60-1                        
     for Marine Applications.                                           
    ASTM F 1120-87 Circular Metallic     56.60-1                        
     Bellows Type Expansion Joints for                                  
     Use in Marine Piping.                                              
    ASTM F 1123-87 Non-Metallic          56.60-1                        
     Expansion Joints for Use in Marine                                 
     Piping Applications.                                               
    ASTM F 1139-88 Steam Traps and       56.60-1                        
     Drains.                                                            
    ASTM F 1172-88 Fuel Oil Meters of    56.60-1                        
     the Volumetric Positive                                            
     Displacement Type.                                                 
    ASTM F 1173-88 Epoxy Resin           56.60-1; 56.60-25              
     Fiberglass Pipe and Fittings to be                                 
     Used for Marine Applications.                                      
    ASTM F 1199-88 Cast and Welded Pipe  56.60-1                        
     Line Strainers.                                                    
    ASTM F 1200-88 Fabricated (Welded)   56.60-1                        
     Pipe Line Strainers.                                               
    ASTM F 1201-88 Fluid Conditioner     56.60-1                        
     Fittings in Piping Applications                                    
     Above0F.                                                           
    ASTM F 1387-93 Standard              56.30-25                       
     Specification for Performance of                                   
     Mechanically Attached Fittings,                                    
     including supplementary                                            
     requirements and annex.                                            
    ASTM F 1476-93 Standard              56-30-35                       
     Specification for Performance of                                   
     Gasketed Mechanical Couplings for                                  
     Use in Piping Applications,                                        
     including annex.                                                   
    ASTM F 1548-94 Standard              56.30-35                       
     specification for Performance of                                   
     Fittings for Use with Gasketed                                     
     Mechanical Couplings for Use in                                    
     Piping Applications.                                               
Expansion Joint Manufacturers                                           
 Association Inc. (EJMA) 25 North                                       
 Broadway, Tarrytown, NY 10591:                                         
    Standards of the Expansion Joint     56.60-1                        
     Manufacturers Association, 1980.                                   
Fluid Controls Institute Inc. (FCI) 31                                  
 South Street, Suite 303, Morristown,                                   
 NJ 07960:                                                              
    FCI 69-1 Pressure Rating Standard    56.60-1                        
     for Steam Traps.                                                   

[[Page 164]]

                                                                        
Manufacturers Standardization Society                                   
 of the Valve and Fittings Industry,                                    
 Inc. (MSS) 127 Park Street NE, Vienna,                                 
 VA 22180:                                                              
    SP-6-85 Standard Finishes for        56.25-10; 56.60-1              
     Contact Faces of Pipe Flanges and                                  
     Connecting-End Flanges of Valves                                   
     and Fittings.                                                      
    SP-9-87 Spot Facing for Bronze,      56.60-1                        
     Iron and Steel Flanges.                                            
    SP-25-88 Standard Marking System     56.15-1; 56.20-5;              
     for Valves, Fittings, Flanges and   56.60-1                        
     Unions.                                                            
    SP-44-85 Steel Pipe Line Flanges...  56.60-1                        
    SP-45-87 Bypass and Drain            56.20-20; 56.60-1              
     Connection Standard.                                               
    SP-51-86 Class 150LW Corrosion       56.60-1                        
     Resistant Cast Flanges and Flanged                                 
     Fittings.                                                          
    SP-53-85 Quality Standard for Steel  56.60-1                        
     Castings and Forgings for Valves,                                  
     Flanges and Fittings and Other                                     
     Piping Components--Magnetic                                        
     Particle Examination Method.                                       
    SP-55-85 Quality Standard for Steel  56.60-1                        
     Castings for Valves, Flanges and                                   
     Fittings and Other Piping                                          
     Components--Visual Method.                                         
    SP-58-83 Pipe Hangers and Supports-- 56.60-1                        
     Materials, Design and Manufacture.                                 
    SP-61-85 Pressure Testing of Steel   56.60-1                        
     Valves.                                                            
    SP-67-83 Butterfly Valves..........  56.60-1                        
    SP-69-83 Pipe Hangers and Supports-- 56.60-1                        
     Selection and Application.                                         
    SP-72-87 Ball Valves with Flanged    56.60-1                        
     or Butt-Welding Ends for General                                   
     Service.                                                           
    SP-73-86 Brazing Joints for Wrought  56.60-1                        
     and Cast Copper Alloy Solder Joint                                 
     Pressure Fittings.                                                 
    SP-83-87 Steel Pipe Unions, Socket-  56.60-1                        
     Welding and Threaded.                                              
Society of Automotive Engineers (SAE),                                  
 400 Commonwealth Drive, Warrendale, Pa                                 
 15096:                                                                 
    J1475-84 Hydraulic Hose Fittings     56.60-25                       
     for Marine Applications.                                           
    J1942-89 Hose and Hose Assemblies    56.60-25                       
     for Marine Applications.                                           
                                                                        


[CGD 77-140, 54 FR 40599, Oct. 2, 1989; 55 FR 39968, Oct. 1, 1990, as 
amended by CGD 88-032, 56 FR 35822, July 29, 1991; CGD 95-012, 60 FR 
48049, Sept. 18, 1995; CGD 95-027, 61 FR 26000, May 23, 1996; CGD 96-
041, 61 FR 50728, Sept. 27, 1996]



Sec. 56.01-3  Power boiler external piping (Replaces 100.1.1, 100.1.2, 111.6, 122.1, 132 and 133).

    (a) Power boiler external piping and components must meet the 
requirements of this part and Secs. 52.01-105, 52.01-110, 52.01-115, and 
52.01-120 of this chapter.
    (b) Specific requirements for power boiler external piping and 
appurtenances, as defined in Secs. 100.1.1 and 100.1.2, appearing in the 
various paragraphs of ANSI B31.1, are not adopted unless specifically 
indicated elsewhere in this part.

[CGD 77-140, 54 FR 40602, Oct. 2, 1989; 55 FR 39968, Oct. 1, 1990]



Sec. 56.01-5   Adoption of ANSI (American National Standards Institute) Code B31.1 for pressure and power piping, and other standards.

    (a) Piping systems for ships and barges shall be designed, 
constructed, and inspected in accordance with B31.1, the ``Code for 
Pressure Piping, Power Piping,'' of the ANSI (American National 
Standards Institute), as limited, modified, or replaced by specific 
requirements in this part. The provisions in the appendices to ANSI-
B31.1 are adopted and shall be followed when the

[[Page 165]]

requirements in ANSI-B31.1 or the regulations in this part make them 
mandatory. For general information Table 56.01-5(a) lists the various 
paragraphs, etc., in ANSI-B31.1 which are limited, modified, replaced, 
or reproduced by regulations in this part.

Table 56.01-5(a)--Limitations and Modifications in the Adoption of ANSI-
                B31.1 Code for Pressure and Power Piping                
------------------------------------------------------------------------
  Section or paragraph in ANSI-B31.1, and                               
                disposition                       Unit in this part     
------------------------------------------------------------------------
100.1 replaced by.........................  56.01-1.                    
100.2 modified by.........................  56.07-5.                    
101 through 104.7 modified by.............  56.07-10.                   
101.2 modified by.........................  56.07-10(a), (b).           
101.5 replaced by.........................  56.07-10(c).                
102.2 modified by.........................  56.07-10(d).                
102.2.5(d) replaced by....................  56.50-40.                   
102.3 and 104.1.2 modified by.............  56.07-10(e).                
104.3 modified by.........................  56.07-10(f).                
104.4 modified by.........................  56.07-10(e).                
104.5.1 modified by.......................  56.30-10.                   
105 through 108 replaced by...............  56.10-1 through 56.25-20.   
110 through 118 replaced by...............  56.30-1 through 56.30-35.   
119.5.1 replaced by.......................  56.35-10, 56.35-15, 56.35-  
                                             35.                        
119.7 replaced by.........................  56.35-1.                    
122.3 modified by.........................  56.50-97.                   
122.6 through 122.10 replaced by..........  56.50-1 through 56.50-80.   
123 replaced by...........................  56.60-1.                    
Table 126.1 is replaced by................  56.30-5(c)(3), 56.60-1.     
127 through 135.4 replaced by.............  56.65-1, 56.70-1 through    
                                             56.90-10.                  
136 replaced by...........................  56.95-1 through 56.95-10.   
137 replaced by...........................  56.97-1 through 56.97-40.   
------------------------------------------------------------------------

    (b) When a section or paragraph of the regulations in this part 
relates to material in ANSI-B31.1 Code (American National Standard Code 
for Pressure Piping, Power Piping), the relationship with this code will 
be shown immediately following the heading of the section or at the 
beginning of the paragraph as follows:
    (1) (Modifies ------.) This indicates that the material in the ANSI-
B31.1 so numbered for identification is generally applicable but is 
being altered, amplified or augmented.
    (2) (Replaces ------.) This indicates that the material in the ANSI-
B31.1 so numbered for identification does not apply.
    (3) (Reproduces ------.) This indicates that the material in the 
ANSI-B31.1 so numbered for identification is being identically 
reproduced for convenience, not for emphasis.
    (c) As stated in Sec. 50.15-10 of this chapter, the standards of the 
ANSI (American National Standards Institute) specifically referred to in 
this part shall be the governing requirements for the subject matters 
covered unless specifically limited, modified or replaced by other 
regulations in this subchapter. See Sec. 56.60-1(b) for the other 
adopted commercial standards applicable to piping systems which also 
form a part of this subchapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 73-
254, 40 FR 40164, Sept. 2, 1975; CGD 77-140, 54 FR 40602, Oct. 2, 1989]



Sec. 56.01-10  Plan approval.

    (a) Plans and specifications for new construction and major 
alterations showing the respective piping systems shall be submitted, as 
required by subpart 50.20 of this subchapter.
    (b) Piping materials and appliances, such as pipe, tubing, fittings, 
flanges, and valves, except safety valves and safety relief valves 
covered in part 162 of subchapter Q (Specifications) of this chapter, 
are not required to be specifically approved by the Commandant, but 
shall comply with the applicable requirements for materials, 
construction, markings, and testing. These materials and appliances 
shall be certified as described in part 50 of this subchapter. Drawings 
listing material specifications and showing details of welded joints for 
pressure-containing appurtenances of welded construction shall be 
submitted in accordance with paragraph (a) of this section.
    (c)(1) Prior to installation aboard ship, diagrams of the following 
systems shall be submitted for approval:
    (i) Steam and exhaust piping.
    (ii) Boiler feed and blowoff piping.
    (iii) Safety valve escape piping.
    (iv) Fuel oil service, transfer and filling piping. (Service 
includes boiler fuel and internal combustion engine fuel piping.)
    (v) Fire extinguishing systems including fire main and sprinkler 
piping, inert gas and foam.
    (vi) Bilge and ballast piping.
    (vii) Tank cleaning piping.

[[Page 166]]

    (viii) Condenser circulating water piping.
    (ix) Vent, sound and overflow piping.
    (x) Sanitary drains, soil drains, deck drains, and overboard 
discharge piping.
    (xi) Internal combustion engine exhaust piping. (Refer to part 58 of 
this subchapter for requirements.)
    (xii) Cargo piping.
    (xiii) Hot water heating systems if the temperature is greater than 
121 deg.C(250 deg.F).
    (xiv) Compressed air piping.
    (xv) Fluid power and control systems (hydraulic, pneumatic). (Refer 
to subpart 58.30 of this subchapter for specific requirements.)
    (xvi) Lubricating oil piping.
    (xvii) Refrigeration and air conditioning piping. (Refer to part 58 
of this subchapter for specific requirements.)
    (2) Arrangement drawings of the following systems shall also be 
submitted prior to installation:
    (i) All Classes I, I-L, and II-L systems.
    (ii) All Class II firemain, foam, sprinkler, bilge and ballast, vent 
sounding and overflow systems.
    (iii) Other Class II systems only if specifically requested or 
required by regulations in this subchapter.
    (d)(1) The drawings or diagrams shall include a list of material, 
furnishing pipe diameters, wall thicknesses, design pressure, fluid 
temperature, applicable ASTM material or ANSI component specification, 
type, size, design standard, and rating of valves, flanges, and 
fittings.
    (2) Pump rated capacity and pump shutoff head shall appear on piping 
diagrams. Pump characteristic curves shall be submitted for all pumps in 
the firemain and foam systems. These curves need not be submitted if the 
following information is shown on the drawing:
    (i) Rated capacity and head at rated capacity.
    (ii) Shutoff head.
    (iii) Head at 150 percent rated capacity.
    (3) Standard drawings of the following fabrication details shall be 
submitted:
    (i) Welding details for piping connections.
    (ii) Welding details for nonstandard fittings (when appropriate).
    (d-1) Plans of piping for industrial systems on mobile offshore 
drilling units must be submitted under subpart 58.60 of this subchapter.
    (e) Where piping passes through watertight bulkheads and/or fire 
boundaries, plans of typical details of piping penetrations shall be 
submitted.
    (f) Arrangement drawings specified in paragraph (c)(2) of this 
section are not required if--
    (1) The location of each component for which there is a location 
requirement (i.e., shell penetration, fire station, foam monitor, etc.) 
is indicated on the piping diagram;
    (2) The diagram includes, or is accompanied by and makes reference 
to, a material schedule which describes components in sufficient detail 
to substantiate their compliance with the regulations of this 
subchapter;
    (3) A thermal stress analysis is not required; and
    (4) A dynamic analysis is neither required nor elected in lieu of 
allowable stress reduction.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 73-
251, 43 FR 56799, Dec. 4, 1978, CGD 77-140, 54 FR 40602, Oct. 2, 1989; 
CGD 95-012, 60 FR 48049, Sept. 18, 1995]



                  Subpart 56.04--Piping Classification



Sec. 56.04-1   Scope.

    Piping shall be classified as shown in Table 56.04-1.

                  Table 56.04-1--Piping Classifications                 
------------------------------------------------------------------------
                                                              Section in
               Service                         Class           this part
------------------------------------------------------------------------
Normal..............................  I, II.................  56.04-2   
Low temperature.....................  I-L, II-L.............  56.50-105 
------------------------------------------------------------------------

[CGD 72-206R, 38 FR 17229, June 29, 1973, as amended by CGD 77-140, 54 
FR 40602, Oct. 2, 1989; CGD 95-012, 60 FR 48049, Sept. 18, 1995]



Sec. 56.04-2   Piping classification according to service.

    The designation of classes according to service is found in Table 
56.04-2.

[[Page 167]]



                                  Table 56.04-2--Pressure Piping Classification                                 
----------------------------------------------------------------------------------------------------------------
                                                           Pressure                                             
             Service                   Class\1\           (p.s.i.g.)                            Temp. ( deg.F)  
----------------------------------------------------------------------------------------------------------------
Class B and C poisons\2\........  I.................  any...............  and...............  0 and above.      
                                  I-L...............  any...............  and...............  below 0.          
                                  II................  (\3\).............  (\3\).............  (\3\)             
                                  II-L..............  (\3\).............  (\3\).............  (\3\)             
Gases and vapors\2\.............  I.................  above 150.........  or................  above 650.        
                                  I-L...............  above 150.........  and...............  below 0.          
                                  II................  150 and below.....  and...............  0 to 650.         
                                  II-L..............  150 and below.....  and...............  below 0.          
Liquefied flammable gases\2\....  I.................  above 150.........  and...............  0 and above.\1\   
                                  I-L...............  above 150.........  and...............  below 0.          
                                  II................  150 and below.....  and...............  0 and above.      
                                  II-L..............  150 and below.....  and...............  below 0.          
Molten sulphur..................  I.................  above 225.........  or................  above 330.        
                                  II................  225 and below.....  and...............  330 and below.    
Cargo liquids Grades A through    I.................  above 225.........  or................  above 150.        
                          D\2\.                                                                                 
                                  I-L...............  above 225.........  and...............  below 0.          
                                  II................  225 and below.....  and...............  0 to 150.         
                                  II-L..............  225 and below.....  and...............  below 0.          
Cargo liquids Grade E...........  I.................  above 225.........  or................  above 400.        
                                  I-L...............  above 225.........  and...............  below 0.          
                                  II................  225 and below.....  and...............  0 to 400.         
                                  II-L..............  225 and below.....  and...............  below 0.          
Water...........................  I.................  above 225.........  or................  above 350.        
                                  II................  225 and below.....  and...............  350 and below.    
Fuels (Bunker, diesel, gasoline,  I.................  above 150.........  or................  above 150.        
                         etc.).                                                                                 
                                  II................  150 and below.....  and...............  150 and below.    
Lubricating oil.................  I.................  above 225.........  or................  above 400.        
                                  II................  225 and below.....  and...............  400 and below.    
Asphalt.........................  I.................  above 225.........  or................  above 400.        
                                  II................  225 and below.....  and...............  400 and below.    
                                                                                                                
Heat transfer oil...............  I.................  above 225.........  or................  above 400.        
                                  II................  225 and below.....  and...............  400 and below.    
Hydraulic fluid.................  I.................  above 225.........  or................  above 400.        
                                  II................  225 and below.....  and...............  400 and below.    
----------------------------------------------------------------------------------------------------------------


Flammable or combustible dangerous   Refer to specific requirements of  
                        cargoes..     part 40 of this chapter.          
Other dangerous cargoes............  Refer to specific requirements of  
                                      part 98 of this chapter.          
------------------------------------------------------------------------
                                                                        
                                                                        
\1\Where doubt exists as to proper classification, refer to the         
  Commandant for resolution.                                            
\2\For definitions, see 46 CFR parts 30, 151, and 154. Note that the    
  category ``B and C'' poisons is not used in the rules applying to self-
  propelled vessels (46 CFR part 153).                                  
\3\Not permitted except inside cargo tanks approved for Class B and C   
  poisons.                                                              

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40164, Sept. 2, 1975; CGD 73-96, 42 FR 49024, Sept. 26, 1977]



Sec. 56.04-10  Other systems.

    Piping systems and appurtenances not requiring plan approval may be 
accepted by the marine inspector if:
    (a) The system is suitable for the service intended,
    (b) There are guards, shields, insulation and similar devices where 
needed for protection of personnel,

[[Page 168]]

    (c) Failure of the systems would not hazard the vessel, personnel or 
vital systems, and
    (d) The system is not manifestly unsafe.

[CGD 77-140, 54 FR 40602, Oct. 2, 1989]



                          Subpart 56.07--Design



Sec. 56.07-5   Definitions (modifies 100.2).

    (a) Piping. The definitions contained in 100.2 of ANSI-B31.1 apply, 
as well as the following:
    (1) The word piping within the meaning of the regulations in this 
subchapter refers to fabricated pipes or tubes with flanges and fittings 
attached, for use in the conveyance of vapors, gases or liquids, 
regardless of whether the diameter is measured on the inside or the 
outside.
    (b) Nominal diameter. The term nominal diameter or diameter as used 
in this part, means the commercial diameter of the piping, i.e., pipe 
size.
    (c) Schedule. The word Schedule when used in this part refers to 
specific values as given in American National Standards B36.10 and 
B36.19.
    (d) Fittings and appurtenances. The word fitting and the phrase 
fittings and appurtenances within the meaning of the regulations in this 
subchapter refer to pressure containing piping system components other 
than valves and pipe. This includes piping system components whose 
function is to join branches of the system (such as tees, wyes, elbows, 
unions, bushings, etc.) which are referred to as pipe joining fittings, 
as well as components which operate on the fluid contained in the system 
(such as traps, drains, strainers, separators, filters, meters, etc.), 
which are referred to as ``fluid conditioner'' fittings. Thermometer 
wells and other similar fittings which form part of the pressure barrier 
of any system are included under this heading. Expansion joints, slip 
joints, rotary joints, quick disconnect couplings, etc., are referred to 
as special purpose fittings, and may be subject to such special design 
and testing requirements as prescribed by the Commandant. Refer to 
subpart 56.15 for design requirements for fittings.
    (e) Nonstandard fittings. ``Nonstandard fitting'' means a component 
of a piping system which is not fabricated under an adopted industry 
standard.
    (f) Vital system. A vital system is one which is essential to the 
safety of the vessel, its passengers and crew.
    (g) Plate flange. The term plate flange, as used in this subchapter, 
means a flange made from plate material, and may have a raised face and/
or a raised hub.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40602, Oct. 2, 1989]



Sec. 56.07-10  Design conditions and criteria (modifies 101-104.7).

    (a) Maximum allowable working pressure (modifies 101.2). (1) The 
maximum allowable working pressure of a piping system shall not be 
greater than the internal design pressure defined in 104.1.2 of ANSI-
B31.1.
    (2) Where the maximum allowable working pressure of a system 
component, such as a valve or a fitting, is less than that computed for 
the pipe or tubing, the system pressure shall be limited to the lowest 
of the component maximum allowable working pressures.
    (b) Relief valves (modifies 101.2). (1) Every system which may be 
exposed to pressures higher than the system's maximum allowable working 
pressure shall be safeguarded by appropriate relief devices. (See 
Sec. 52.01-3 of this subchapter for definitions.) Relief valves are 
required at pump discharges except for centrifugal pumps so designed and 
applied that a pressure in excess of the maximum allowable working 
pressure for the system cannot be developed.
    (2) The relief valve setting shall not exceed the maximum allowable 
working pressure of the system. Its relieving capacity shall be 
sufficient to prevent the pressure from rising more than 20 percent 
above the system maximum allowable working pressure. The rated relieving 
capacity of safety and relief valves used in the protection of piping 
systems only shall be based on actual flow test data and the capacity 
shall be certified by the manufacturer at 120 percent of the set 
pressure of the valve.

[[Page 169]]

    (3) Relief valves shall be certified as required in part 50 of this 
subchapter for valves, and shall also meet the requirements of 
Sec. 54.15-10 of this subchapter.
    (c) Ship motion dynamic effects (replaces 101.5.3). (1) In Class I, 
I-L, and II-L systems, the full allowable stress permitted by these 
regulations may be used only if:
    (i) The effects of ship motion and flexure, including collision, 
weight, yaw, sway, roll, pitch, heave and vibration, are taken into 
account by either calculations or model testing acceptable to the Coast 
Guard; and
    (ii) Additional nondestructive testing that provides complete 
volumetric examination of the material (e.g., Supplemental Requirement 
S6.1 to ASTM A376 for ultrasonics or other forms of nondestructive 
examination acceptable to the Coast Guard) is performed.
    (2) Otherwise, 80% or less of the allowable stress permitted must be 
used in Class I, I-L and II-L systems. This reduction in allowable 
stress is not intended to take into account impact loading inside the 
piping system, such as water or steam hammer and hydraulic shock.
    (3) For Class II systems the full allowable stress may be used 
without the requirements of paragraphs (c)(1)(i) and (c)(1)(ii) of this 
section.
    (d) Pressure temperature ratings (modifies 102.2). The material in 
102.2 of ANSI-B31.1 is applicable with the following exceptions:
    (1) The details of components not having specific ratings as 
described in 102.2.2 of ANSI B31.1 must be furnished to the Marine 
Safety Center for approval.
    (2) Boiler blowoff piping must be designed in accordance with 
Sec. 56.50-40 of this part.
    (e) Pressure design (modifies 102.3, 104.1.2, and 104.4). Materials 
for use in piping systems must be selected as described in Sec. 56.60-
1(a) of this part. Tabulated allowable stress values for these materials 
shall be taken as indicated in 102.3.1 of ANSI-B31.1, Table 56.60-1(a) 
and 56.60-2(a). Allowable stress values as found in the ASME Code which 
are restricted in application by footnote or which are italicized shall 
not be used. Where multiple stresses are listed for a material, the 
lowest value of the listing shall be used unless otherwise approved by 
the Commandant. In all cases the temperature is understood to be the 
actual temperature of the component. Where it is desired to use a 
material not listed, permission must be obtained from the Commandant. 
For Class I, I-L, II-L and nuclear piping systems the values of stress 
(Sc, Sh, SE) as used in equations appearing in 102.3.2, 
104.1.2, and 104.4 of ANSI-B31.1 are to be limited to 80 percent of the 
tabulated values if the dynamic effects are not considered and 
additional material inspection is not accomplished as per paragraph (c) 
of this section. Requirements for testing found in Sec. 56.97-40(a)(2) 
and (4) may affect design and should be considered. Special design 
limitations may be found for specific systems. Refer to subpart 56.50 
for specific requirements.
    (f) Intersections (modifies 104.3). The material of ANSI-B31.1 in 
104.3 is applicable with the following additions:
    (1) Reinforcement calculations where applicable shall be submitted.
    (2) Wherever possible the longitudinal joint of a welded pipe should 
not be pierced.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; 37 FR 16803, Aug. 19, 1972; CGD 73-254, 40 FR 
40164, Sept. 2, 1975; CGD 77-140, 54 FR 40602, Oct. 2, 1989; CGD 95-012, 
60 FR 48050, Sept. 18, 1995]



                        Subpart 56.10--Components



Sec. 56.10-1   Selection and limitations of piping components (replaces 105 through 108).

    (a) Pipe, tubing, pipe joining fittings, and piping system 
components, shall meet material and standard requirements of subpart 
56.60 and shall meet the certification requirements of part 50 of this 
subchapter.
    (b) The requirements in this subpart and subparts 56.15 through 
56.25 shall be followed in lieu of those in 105 through 108 in ANSI-
B31.1; however, certain requirements are marked ``reproduced.''

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970]

[[Page 170]]



Sec. 56.10-5   Pipe.

    (a) General. Pipe and tubing shall be selected as described in Table 
56.60-1(a).
    (b) Ferrous pipe. ASTM Specification A53 furnace welded pipe shall 
not be used for combustible or flammable liquids within machinery 
spaces. (See Secs. 30.10-15 and 30.10-22 of this chapter.)
    (c) Nonferrous pipe. (See also Sec. 56.60-20.) (1) Copper and brass 
pipe for water and steam service may be used for design pressures up to 
250 pounds per square inch and for design temperatures to 406 deg. F.
    (2) Copper and brass pipe for air may be used in accordance with the 
allowable stresses found from Table 56.60-1(a).
    (2-a) Copper-nickel alloys may be used for water and steam service 
within the design stress and temperature limitations indicated in ANSI-
B31.1.
    (3) Copper tubing may be used for dead-end instrument service up to 
1,000 pounds per square inch.
    (4) Copper, brass, or aluminum pipe or tube shall not be used for 
flammable fluids except where specifically permitted by this part.
    (5) Aluminum alloy pipe or tube may be used within the limitation 
stated in 123.2.7 of ANSI-B31.1 and paragraph (4) of this section (c)5.
    (d) Nonmetallic pipe. (1) Polyvinyl chloride pipe may be used for 
water, nonflammable chemicals and air service, provided the pressure is 
limited to 150 pounds per square inch gage and the temperature to 
140 deg. F. Other types of plastic pipe may be used in the above 
services provided that it is demonstrated that the pipe is suitable for 
the service conditions and is being used within the manufacturer's 
recommendations for pressure and temperature.
    (2) Refer to Sec. 56.60-25(a) for further details on limitations in 
the uses of nonmetallic pipe.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 77-
140, 54 FR 40602, Oct. 2, 1989]



                         Subpart 56.15--Fittings

    Source: CGD 77-140, 54 FR 40602, Oct. 2, 1989, unless otherwise 
noted.



Sec. 56.15-1  Pipe joining fittings.

    (a) Pipe joining fittings certified in accordance with subpart 50.25 
of this subchapter are acceptable for use in piping systems.
    (b) Threaded, flanged, socket-welding, buttwelding, and socket-
brazing pipe joining fittings, made in accordance with the applicable 
standards in Tables 56.60-1(a) and 56.60-1(b) of this part and of 
materials complying with subpart 56.60 of this part, may be used in 
piping systems within the material, size, pressure, and temperature 
limitations of those standards and within any further limitations 
specified in this subchapter. Fittings must be designed for the maximum 
pressure to which they may be subjected, but in no case less than 50 
pounds per square inch gage.
    (c) Pipe joining fittings not accepted for use in piping systems in 
accordance with paragraph (b) of this section must meet the following:
    (1) All pressure-containing materials must be accepted in accordance 
with Sec. 56.60-1 of this part.
    (2) Fittings must be designed so that the maximum allowable working 
pressure does not exceed one-fourth of the burst pressure or produce a 
primary stress greater than one-fourth of the ultimate tensile strength 
of the material for Class II systems and for all Class I, I-L, and II-L 
systems receiving ship motion dynamic analysis and nondestructive 
examination. For Class I, I-L, or II-L systems not receiving ship motion 
dynamic analysis and nondestructive examination under Sec. 56.07-10(c) 
of this part, the maximum allowable working pressure must not exceed 
one-fifth of the burst pressure or produce a primary stress greater than 
one-fifth of the ultimate tensile strength of the material. The maximum 
allowable working pressure may be determined by--
    (i) Calculations comparable to those of ANSI B31.1 or Section VIII 
of the ASME Code;
    (ii) Subjecting a representative model to a proof test or 
experimental stress analysis described in paragraph A-22 of Section I of 
the ASME Code; or
    (iii) Other means specifically accepted by the Marine Safety Center.

[[Page 171]]

    (3) Fittings must be tested in accordance with Sec. 56.97-5 of this 
part.
    (4) If welded, fittings must be welded in accordance with subpart 
56.70 of this part and part 57 of this chapter or by other processes 
specifically approved by the Marine Safety Center. In addition, for 
fittings to be accepted for use in piping systems in accordance with 
this paragraph, the following requirements must be met:
    (i) For fittings sized three inches and below--
    (A) The longitudinal joints must be fabricated by either gas or arc 
welding;
    (B) One fitting of each size from each lot of 100 or fraction 
thereof must be flattened cold until the opposite walls meet without the 
weld developing any cracks;
    (C) One fitting of each size from each lot of 100 or fraction 
thereof must be hydrostatically tested to the pressure required for a 
seamless drawn pipe of the same size and thickness produced from 
equivalent strength material, as determined by the applicable pipe 
material specification; and
    (D) If a fitting fails to meet the test in paragraph (c)(4)(i)(B) or 
(c)(4)(i)(C) of this section, no fitting in the lot from which the test 
fitting was chosen is acceptable.
    (ii) For fittings sized above three inches--
    (A) The longitudinal joints must be fabricated by arc welding;
    (B) For pressures exceeding 150 pounds per square inch, each fitting 
must be radiographically examined as specified in Section VIII of the 
ASME Code;
    (C) For pressures not exceeding 150 pounds per square inch, the 
first fitting from each size in each lot of 20 or fraction thereof must 
be examined by radiography to ensure that the welds are of acceptable 
quality;
    (D) One fitting of each size from each lot of 100 or fraction 
thereof must be hydrostatically tested to the pressure required for a 
seamless drawn pipe of the same size and thickness produced from 
equivalent strength material, as determined by the applicable pipe 
material specification; and
    (E) If a fitting fails to meet the test in paragraph (c)(4)(ii)(C) 
or (c)(4)(ii)(D) of this section, no fitting in the lot from which the 
test fitting was chosen is acceptable.
    (d) Single welded butt joints without the use of backing strips may 
be employed in the fabrication of pipe joining fittings of welded 
construction provided radiographic examination indicates that complete 
penetration is obtained.
    (e) Each pipe joining fitting must be marked in accordance with MSS 
Standard SP-25.



Sec. 56.15-5  Fluid-conditioner fittings.

    (a) Fluid conditioner fittings certified in accordance with subpart 
50.25 of this subchapter are acceptable for use in piping systems.
    (b) Fluid conditioner fittings, not containing hazardous materials 
as defined in Sec. 150.115 of this chapter, which are made in accordance 
with the applicable standards listed in Table 56.60-1(b) of this part 
and of materials complying with subpart 56.60 of this part, may be used 
within the material, size, pressure, and temperature limitations of 
those standards and within any further limitations specified in this 
subchapter.
    (c) The following requirements apply to nonstandard fluid 
conditioner fittings which do not contain hazardous materials as defined 
in Sec. 150.115 of this chapter:
    (1) The following nonstandard fluid conditioner fittings must meet 
the applicable requirements in Sec. 54.01-5 (c)(3), (c)(4), and (d) of 
this chapter or the remaining provisions in part 54 of this chapter, 
except that Coast Guard shop inspection is not required:
    (i) Nonstandard fluid conditioner fittings that have a net internal 
volume greater than 0.04 cubic meters (1.5 cubic feet) and that are 
rated for temperatures and pressures exceeding those specified as 
minimums for Class I piping systems.
    (ii) Nonstandard fluid-conditioner fittings that have an internal 
diameter exceeding 15 centimeters (6 inches) and that are rated for 
temperatures and pressures exceeding those specified as minimums for 
Class I piping systems.
    (2) All other nonstandard fluid conditioner fittings must meet the 
following:

[[Page 172]]

    (i) All pressure-containing materials must be accepted in accordance 
with Sec. 56.60-1 of this part.
    (ii) Nonstandard fluid conditioner fittings must be designed so that 
the maximum allowable working pressure does not exceed one-fourth of the 
burst pressure or produce a primary stress greater than one-fourth of 
the ultimate tensile strength of the material for Class II systems and 
for all Class I, I-L, and II-L systems receiving ship motion dynamic 
analysis and nondestructive examination. For Class I, I-L, or II-L 
systems not receiving ship motion dynamic analysis and nondestructive 
examination under Sec. 56.07-10(c) of this part, the maximum allowable 
working pressure must not exceed one-fifth of the burst pressure or 
produce a primary stress greater than one-fifth of the ultimate tensile 
strength of the material. The maximum allowable working pressure may be 
determined by--
    (A) Calculations comparable to those of ANSI B31.1 or Section VIII 
of the ASME Code;
    (B) Subjecting a representative model to a proof test or 
experimental stress analysis described in paragraph A-22 of Section I of 
the ASME Code; or
    (C) Other means specifically accepted by the Marine Safety Center.
    (iii) Nonstandard fluid conditioner fittings must be tested in 
accordance with Sec. 56.97-5 of this part.
    (iv) If welded, nonstandard fluid conditioner fittings must be 
welded in accordance with subpart 56.70 of this part and part 57 of this 
chapter or by other processes specifically approved by the Marine Safety 
Center.
    (d) All fluid conditioner fittings that contain hazardous materials 
as defined in Sec. 150.115 of this chapter must meet the applicable 
requirements of part 54 of this chapter, except subpart 54.10.
    (e) Heat exchangers having headers and tubes and brazed boiler steam 
air heaters are not considered fluid conditioner fittings and must meet 
the requirements in part 54 of this chapter regardless of size. For 
brazed boiler steam air heaters, see also Sec. 56.30-30(b)(1) of this 
part.

CGD 77-140, 54 FR 40602, Oct. 2, 1989, as amended by CGD 83-043, 60 FR 
24772, May 10, 1995]



Sec. 56.15-10  Special purpose fittings.

    (a) Special purpose fittings certified in accordance with subpart 
50.25 of this subchapter are acceptable for use in piping systems.
    (b) Special purpose fittings made in accordance with the applicable 
standards listed in Table 56.60-1(b) of this part and of materials 
complying with subpart 56.60 of this part, may be used within the 
material, size, pressure, and temperature limitations of those standards 
and within any further limitations specified in this subchapter.
    (c) Nonstandard special purpose fittings must meet the requirements 
of Secs. 56.30-25, 56.30-40, 56.35-10, 56.35-15, or 56.35-35 of this 
part, as applicable.



                          Subpart 56.20--Valves



Sec. 56.20-1  General.

    (a) Valves certified in accordance with subpart 50.25 of this 
subchapter are acceptable for use in piping systems.
    (b) Non-welded valves complying with the standards listed in 
Sec. 56.60-1 of this part may be used within the specified pressure and 
temperature ratings of those standards, provided the limitations of 
Sec. 56.07-10(c) of this part are applied. Materials must comply with 
subpart 56.60 of this part. Welded valves complying with the standards 
and specifications listed in Sec. 56.60-1 of this part may be used in 
Class II systems only unless they meet paragraph (c) of this section.
    (c) All other valves must meet the following:
    (1) All pressure-containing materials must be accepted in accordance 
with Sec. 56.60-1 of this part.
    (2) Valves must be designed so that the maximum allowable working 
pressure does not exceed one-fourth of the burst pressure or produce a 
primary stress greater than one-fourth of the ultimate tensile strength 
of the material for Class II systems and for all Class I, I-L, and II-L 
systems receiving ship motion dynamic analysis and nondestructive 
examination. For Class I, I-L, or II-L systems not receiving ship motion 
dynamic analysis and nondestructive examination under Sec. 56.07-

[[Page 173]]

10(c) of this part, the maximum allowable working pressure must not 
exceed one-fifth of the burst pressure or produce a primary stress 
greater than one-fifth of the ultimate tensile strength of the material. 
The maximum allowable working pressure may be determined by--
    (i) Calculations comparable to those of ANSI B31.1 or Section VIII 
of the ASME Code, if the valve shape permits this;
    (ii) Subjecting a representative model to a proof test or 
experimental stress analysis described in paragraph A-22 of Section I of 
the ASME Code; or
    (iii) Other means specifically accepted by the Marine Safety Center.
    (3) Valves must be tested in accordance with Sec. 56.97-5 of this 
part.
    (4) If welded, valves must be welded in accordance with subpart 
56.70 of this part and part 57 of this chapter or by other processes 
specifically approved by the Marine Safety Center.
    (d) Where liquid trapped in any closed valve can be heated and an 
uncontrollable rise in pressure can result, means must be provided in 
the design, installation, and operation of the valve to ensure that the 
pressure in the valve does not exceed that allowed by this part for the 
attained temperature. (For example, if a flexible wedge gate valve with 
the stem installed horizontally is closed, liquid from testing, 
cleaning, or condensation can be trapped in the bonnet section of the 
closed valve.) Any resulting penetration of the pressure wall of the 
valve must meet the requirements of this part and those for threaded and 
welded auxiliary connections in ANSI B16.34.

[CGD 77-140, 54 FR 40604, Oct. 2, 1989; 55 FR 39968, Oct. 1, 1990]



Sec. 56.20-5   Marking (reproduces 107.2).

    (a) Each valve shall bear the manufacturer's name or trademark and 
reference symbol to indicate the service conditions for which the 
manufacturer guarantees the valve. The marking shall be in accordance 
with MSS-SP-25.



Sec. 56.20-7   Ends.

    (a) Valves may be used with flanged, threaded, butt welding, socket 
welding or other ends in accordance with applicable standards as 
specified in subpart 56.60.



Sec. 56.20-9  Valve construction.

    (a) All valves must close with a right-hand (clockwise) motion of 
the handwheel or operating lever when facing the end of the valve stem. 
Gate, globe and angle valves must generally be of the rising-stem type, 
preferably with the stem threads external to the valve body. Where 
operating conditions will not permit such installations, the use of 
nonrising-stem valves will be permitted. Nonrising-stem valves, lever 
operated valves, and any other valve where, due to design, the position 
of the disc or closure mechanism is not obvious shall be fitted with 
indicators to show whether the valve is opened or closed. Such 
indicators are not required for valves located in tanks or similar 
inaccessible spaces where indication is provided at the remote valve 
operator. Operating levers of the quarter-turn (rotary) valves must be 
parallel to the fluid flow in the open position and perpendicular to the 
fluid flow in the closed position.
    (b) Valves of Class I piping systems (for restrictions in other 
classes refer to sections on low temperature service), having diameters 
exceeding 2 inches must have bolted, pressure seal, or breech lock 
bonnets and flanged or welding ends, except that socket type welding 
ends shall not be used where prohibited by Sec. 56.30-5(c) of this part, 
Sec. 56.30-10(b)(4) of this part for the same pressure class, or 
elsewhere in this part. For diameters not exceeding 2 inches, screwed 
union bonnet or bolted bonnet, or bonnetless valves of a type which will 
positively prevent the stem from screwing out of the body may be 
employed. Outside screw and yoke design must be used for valves 3 inches 
and larger for pressures above 600 pounds per square inch gage. Cast 
iron valves with screwed-in or screwed-over bonnets are prohibited. 
Union bonnet type cast iron valves must have the bonnet ring made of 
steel, bronze, or malleable iron.
    (c) Valves must be designed for the maximum pressure to which they 
may be subjected, but in no case shall the design pressure be less than 
50 pounds per square inch gage. The use of wafer

[[Page 174]]

type resilient seated valves is not permitted for shell connections 
unless they are so arranged that the piping immediately inboard of the 
valve can be removed without affecting the watertight integrity of the 
shell connection. Refer also to Sec. 56.20-15(b)(2)(ii) of this part. 
Large fabricated ballast manifold connecting lines exceeding 8 inches 
nominal pipe size must be designed for a pressure of not less than 25 
pounds per square inch gage.
    (d) Disks or disk faces, seats, stems and other wearing parts of 
valves shall be made of material possessing corrosion and heat-resisting 
qualities suitable for the service conditions to which they may be 
subjected.
    (e) Plug cocks shall be constructed with satisfactory and positive 
means of preventing the plug from becoming loosened or removed from the 
body when the plug is operated. Cocks having plug locking arrangements 
depending on cotter pins are prohibited.
    (f) Cocks shall be marked in a straight line with the body to 
indicate whether they are open or closed.
    (g) Materials forming a portion of the pressure barrier shall comply 
with the applicable provisions of this part.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40604, Oct. 2, 1989; CGD 95-012, 60 FR 48050, Sept. 18, 1995]



Sec. 56.20-15   Valves employing resilient material.

    (a) A valve in which the closure is accomplished by resilient 
nonmetallic material instead of a metal to metal seat shall comply with 
the design, material and construction specified for valves in this part.
    (b) Valves employing resilient material shall be divided into three 
categories: Category A, Category B, and positive shut-off.
    (1) Category A valves. (i) Category A valves are those valves 
employing resilient material that would continue to provide effective 
closure of the line and would not allow appreciable leakage from the 
valve if the resilient material were damaged or destroyed.
    (ii) Category A valves may be used in any piping system except as 
positive shutoff valves required by Sec. 56.50-60(d) for systems subject 
to internal head pressure from tanks containing flammable, combustible, 
or hazardous materials, or as otherwise exempted in the regulations in 
this subchapter.
    (2) Category B valves. (i) Category B valves are those valves 
employing resilient material that would not provide effective closure of 
the line or would permit appreciable leakage from the valve if the 
resilient material were damaged or destroyed.
    (ii) Category B valves may be used in any piping system, except: In 
any location in a fixed fire extinguishing system or bilge system; as 
the positive closure for any opening in the shell of a vessel; in a 
position in which the valve serves as the positive shutoff valve 
required by Sec. 56.50-60(d) of this part for systems subject to 
internal head pressure from tanks containing flammable, combustible, or 
hazardous materials; or as otherwise prohibited under this subchapter.
    (c) Valves employing resilient material will be determined to be 
qualified as Category A, Category B, or positive shut-off as follows:
    (1) Category A--The closed valve must pass less than the greater of 
five percent or 15%/    (NPS) of its fully open flow rate through the 
line after complete removal of all resilient seating material or 
equivalent and testing at full rated pressure. (Note.--``NPS'' is 
nominal pipe size.)
    (2) Positive shutoff--The closed valve must pass less than 10 m1/
hour (0.34 fluid oz/hour) of liquid or 3 liters/hour (0.11 standard 
cubic feet/hour) of gas per inch nominal size through the line after 
removal of all resilient seating material or equivalent and testing at 
full rated pressure. Packing material must be fire resistant. This valve 
type will be considered suitable for internal head pressure from tanks 
(positive shutoff) as well as a Category A valve.
    (3) If a valve designer elects to use either calculations or actual 
fire testing in lieu of material removal and pressure testing, the 
proposed calculation method or test plan must be accepted by the 
Commandant (G-MSE).
    (4) Category B--Valves containing resilient seating or packing 
material, nonmetallic composition discs, or similar components and which 
have not

[[Page 175]]

passed one of the above tests are considered Category B valves.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40604, Oct. 2, 1989; CGD 95-072, 60 FR 50462, Sept. 29, 1995; CGD 96-
041, 61 FR 50728, Sept. 27, 1996]



Sec. 56.20-20   Valve bypasses.

    (a) Sizes of bypasses shall be in accordance with MSS-SP-45.
    (b) Pipe for bypasses should be at least Schedule 80 seamless, and 
of a material of the same nominal chemical composition and physical 
properties as that used for the main line. Lesser thickness may be 
approved depending on the installation and service conditions.
    (c) Bypasses may be integral or attached.



   Subpart 56.25--Pipe Flanges, Blanks, Flange Facings, Gaskets, and 
                                 Bolting



Sec. 56.25-5  Flanges.

    Flanges must conform to the design requirements of the applicable 
standards of Table 56.60-1(b) of this part of Appendix 2 of section VIII 
of the ASME Code. Plate flanges must meet the requirements of 
Sec. 56.30-10(b)(5) of this part and the material requirements of 
Sec. 56.60-1(a) of this part. Flanges may be integral or may be attached 
to pipe by threading, welding, brazing, or other means within the 
applicable standards specified in Table 56.60-1(b) of this part and the 
requirements of this subpart. For flange facing gasket combinations 
other than those specified above, calculations must be submitted 
indicating that the gaskets will not result in a higher bolt loading or 
flange moment than for the acceptable configurations.

[CGD 77-140, 54 FR 40605, Oct. 2, 1989]



Sec. 56.25-7   Blanks.

    (a) Blanks shall conform to the design requirements of 104.5.3 of 
ANSI-B31.1.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970]



Sec. 56.25-10   Flange facings.

    (a) Flange facings shall be in accordance with the applicable 
standards listed in Table 56.60-1(b) and MSS-SP-6.
    (b) When bolting class 150 standard steel flanges to flat face cast 
iron flanges, the steel flange must be furnished with a flat face, and 
bolting must be in accordance with Sec. 56.25-20 of this part. Class 300 
raised face steel flanges may be bolted to class 250 raised face cast 
iron flanges with bolting in accordance with Sec. 56.25-20(b) of this 
part.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40605, Oct. 2, 1989]



Sec. 56.25-15   Gaskets (reproduces 108.4).

    (a) Gaskets shall be made of materials which are not injuriously 
affected by the fluid or by temperature.
    (b) Only metallic and suitable asbestos-free nonmetallic gaskets may 
be used on flat or raised face flanges if the expected normal operating 
pressure exceeds 720 pounds per square inch or the operating temperature 
exceeds 750  deg.F.
    (c) The use of metal and nonmetallic gaskets is not limited as to 
pressure provided the gasket materials are suitable for the maximum 
fluid temperatures.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 86-035, 54 FR 
36316, Sept. 1, 1989]



Sec. 56.25-20  Bolting.

    (a) General. (1) Bolts, studs, nuts, and washers must comply with 
applicable standards and specifications listed in Sec. 56.60-1 of this 
part. Unless otherwise specified, bolting must be in accordance with 
ANSI B16.5.
    (2) Bolts and studs must extend completely through the nuts.
    (3) See Sec. 58.30-15(c) of this chapter for exceptions on bolting 
used in fluid power and control systems.
    (b) Carbon steel bolts or bolt studs may be used if expected normal 
operating pressure does not exceed 300 pounds per square inch gage and 
the expected normal operating temperature does not exceed 400  deg.F. 
Carbon steel bolts must have heavy hexagon heads in accordance with ANSI 
B18.2.1 and must have heavy semifinished hexagonal nuts in

[[Page 176]]

accordance with ANSI B18.2.2, unless the bolts are tightly fitted to the 
holes and flange stress calculations taking the bolt bending stresses 
into account are submitted. When class 250 cast iron flanges are used or 
when class 125 cast iron flanges are used with ring gaskets, the bolting 
material must be carbon steel conforming to ASTM Specification A307, 
Grade B.
    (c) Alloy steel stud bolts must be threaded full length or, if 
desired, may have reduced shanks of a diameter not less than that at the 
root of the threads. They must have heavy semifinished hexagonal nuts in 
accordance with ANSI B18.2.2.
    (d) All alloy bolts or bolt studs and accompanying nuts are 
recommended to be threaded in accordance with ANSI B1.1, Class 2A 
external threads, and Class 2B internal threads (8-thread series 8UN for 
1 inch and larger).
    (e) (Reproduces 108.5.6.) Washers, when used under nuts, shall be of 
forged or rolled steel.

[CGFR 68-82, 33 FR 18843, Dec.18, 1968, as amended by CGD 77-140, 54 FR 
40605, Oct. 2, 1989]



        Subpart 56.30--Selection and Limitations of Piping Joints



Sec. 56.30-1   Scope (replaces 110 through 118).

    (a) The selection and limitation of piping joints shall be as 
required by this subpart in lieu of requirements in 110 through 118 of 
ANSI-B31.1; however certain requirements are marked ``reproduced'' in 
this subpart.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970]



Sec. 56.30-3   Piping joints (reproduces 110).

    The type of piping joint used shall be suitable for the design 
conditions and shall be selected with consideration of joint tightness, 
mechanical strength and the nature of the fluid handled.



Sec. 56.30-5  Welded joints.

    (a) General. Welded joints may be used for materials for which 
welding procedures, welders, and welding machine operators have been 
qualified in accordance with part 57 of this subchapter.
    (b) Butt welds--general. Butt welds may be made with or without 
backing or insert rings within the limitations established in 
Sec. 56.70-15. When the use of backing rings will result in undesirable 
conditions such as severe stress concentrations, corrosion or erosion, 
then:
    (1) The backing rings shall be removed and the inside of the joint 
ground smooth, or
    (2) The joint shall be welded without backing rings, or
    (3) Consumable insert rings must be used. Commonly used types of 
butt welding end preparations are shown in ANSI B16.25.
    (4) Restrictions as to the use of backing rings appear for the low 
temperature piping systems and should be checked when designing for 
these systems.
    (c) Socket welds (modifies 127.3.3A). (1) Socket welds must conform 
to ANSI B16.11, applicable standards listed in Table 56.60-1(b) of this 
part, and Figure 127.4.4C in ANSI B31.1 as modified by Sec. 56.30-
10(b)(4) of this part. A gap of approximately one-sixteenth inch between 
the end of the pipe and the bottom of the socket must be provided before 
welding. This may best be provided by bottoming the pipe and backing off 
slightly before tacking.
    (2) Socket welds must not be used where severe erosion or crevice 
corrosion is expected to occur. Restrictions on the use of socket welds 
appear in Sec. 56.70-15(d)(3) of this part for Class I service and in 
Sec. 56.50-105 of this part for low temperature service. These sections 
should be checked when designing for these systems. See Sec. 56.70-
15(d)(4) of this part for Class II service.
    (3) (Reproduces 111.3.4.) Drains and bypasses may be attached to a 
valve of fitting by socket welding provided the socket depth, bore 
diameter, and shoulder thickness conform to ANSI B16.11.
    (d) Fillet welds. Fillet welds may vary from convex to concave. The 
size of a fillet weld is determined as shown in Figure 127.4.4A of ANSI 
B31.1. Fillet weld details for socket-welding components must meet 
Sec. 56.30-5(c) of this part. Fillet weld details for flanges must meet 
Sec. 56.30-10 of this part. See

[[Page 177]]

also Sec. 56.70-15(d)(3) and (d)(4) of this part for applications of 
fillet welds.
    (e) Seal welds. Seal welds may be used but shall not be considered 
as contributing any strength to the joint.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40605, Oct. 2, 1989; CGD 95-
012, 60 FR 48050, Sept. 18, 1995]



Sec. 56.30-10  Flanged joints (modifies 104.5.1(a)).

    (a) Flanged or butt-welded joints are required for Classes I and I-L 
piping for nominal diameters exceeding 2 inches, except as otherwise 
specified in this subchapter.
    (b) Flanges may be attached by any method shown in Figure 56.30-
10(b) or by any additional means that may be approved by the Marine 
Safety Center. Pressure temperature ratings of the appropriate ANSI 
standard must not be exceeded.
    (1) Figure 56.30-10(b), Method 1. Flanges with screw threads may be 
used in accordance with Table 56.30-20(c) of this part.
    (2) Figure 56.30-10(b), Method 2. ANSI B16.5 class 150 and class 300 
low-hubbed flanges with screw threads, plus the addition of a strength 
fillet weld of the size as shown, may be used in Class I systems not 
exceeding 750  deg.F or 4 NPS, in Class II systems without diameter 
limitations, and in Class II-L systems not exceeding 1 NPS. If 100 
percent radiography is required by Sec. 56.95-10 of this part for the 
class, diameter, wall thickness, and material of pipe being joined, the 
use of the threaded flanges is not permitted and buttwelding flanges 
must be provided. For Class II piping systems, the size of the strength 
fillet may be limited to a maximum of 0.525 inch instead of 1.4T.
    (3) Figure 56.30-10(b), Method 3. ANSI B16.5 slip-on flanges may be 
used in Class I, Class II, or Class II-L systems not to exceed the 
service pressure-temperature ratings for the class 300 and lower class 
flanges, within the temperature limitations of the material selected for 
use, and not to exceed 4 NPS in Class I and Class II-L systems. If 100 
percent radiography is required by Sec. 56.95-10 of this part for the 
class, diameter, wall thickness, and material of the pipe being joined, 
the use of slip-on flanges is not permitted and a butt welding flange 
must be provided. The configuration in Figure 127.4.4B(b) of ANSI B31.1. 
utilizing a face and backweld may be preferable in those applications 
where it is desirable to eliminate void spaces. For Class II piping 
systems, the size of the strength fillet may be limited to a maximum of 
0.525 inch instead of 1.4T and the distance from the face of the flange 
to the end of the pipe may be a maximum of three-eighths inch. 
Restrictions on the use of slip-on flanges appear in Sec. 56.50-105 of 
this part for low temperature piping systems.
    (4) Figure 56.30-10(b), Method 4. ANSI B16.5 socket welding flanges 
may be used in Class I or II-L systems not exceeding 3 NPS for class 600 
and lower class flanges and 2\1/2\ NPS for class 900 and class 1500 
flanges within the service pressure-temperature ratings of the standard. 
Whenever full radiography is required by Sec. 56.95-10 for the class, 
diameter, and wall thickness of the pipe being joined, the use of socket 
welding flanges in not permitted and a butt weld type connection must be 
provided. For Class II piping, socket welding flanges may be used 
without diameter limitation, and the size of the fillet weld may be 
limited to a maximum of 0.525 inch instead of 1.4T. Restrictions on the 
use of socket welds appear in Sec. 56.50-105 for low temperature piping 
systems.
    (5) Figure 56.30-10(b), Method 5. Flanges fabricated from steel 
plate meeting the requirements of part 54 of this chapter may be used 
for Class II piping for pressures not exceeding 150 pounds per square 
inch and temperatures not exceeding 450  deg.F. Plate material listed in 
UCS-6(b) Section VIII of the ASME Code may not be used in this 
application, except that material meeting ASTM Specification A36 may be 
used. The fabricated flanges must conform at least to the American 
National Standard class 150 flange dimensions. The size of the strength 
fillet weld may be limited to a maximum of 0.525 inches instead of 1.4T 
and the distance from the face of the flange to the end of the pipe may 
be a maximum of three-eighths inch.

[[Page 178]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.024


               Figure 56.30-10(b)--Methods of attachment.
     Note: T is nominal pipe wall thickness used. Refer to text in 
 Sec. 56.30-10(b) for modifications on Class II piping systems. Fillet 
 weld leg size need not exceed the thickness of the applicable ANSI hub.
    (6) Figure 56.30-10(b), Method 6. Steel plate flanges meeting the 
material and construction requirements listed in subparagraph (5) of 
this paragraph may be used for Class II piping for pressures not 
exceeding 150 pounds per square inch or temperatures not exceeding 
650 deg. F. The flange shall be attached to the pipe as shown by Figure 
56.30-10(b). Method 6. The pressure shall not exceed the American 
National Standard Service pressure temperature rating. The size of the 
strength fillet weld may be limited to a maximum of 0.525 inch

[[Page 179]]

instead of 1.4T and the distance from the face of the flange to the end 
of the pipe may be a maximum of three-eighths inch.
    (7) Figure 56.30-10(b), Method 7. Lap joint flanges (Van Stone) may 
be used for Class I and Class II piping. The Van Stone equipment shall 
be operated by competent personnel. The ends of the pipe shall be heated 
from 1,650 deg. to 1,900 deg. F. dependent on the size of the pipe prior 
to the flanging operation. The foregoing temperatures shall be carefully 
adhered to in order to prevent excess scaling of the pipe. The extra 
thickness of metal built up in the end of the pipe during the forming 
operation shall be machined to restore the pipe to its original 
diameter. The machined surface shall be free from surface defects and 
the back of the Van Stone lap shall be machined to a fine tool finish to 
furnish a line contact with the mating surface on the flange for the 
full circumference as close as possible to the fillet of the flange. The 
number of heats to be used in forming a flange shall be determined by 
the size of the pipe and not more than two pushups per heat are 
permitted. The width of the lap flange shall be at least three times the 
thickness of the pipe wall and the end of the pipe shall be properly 
stress relieved after the flanging operation is completed. Manufacturers 
desiring to produce this type of joint shall demonstrate to a marine 
inspector that they have the proper equipment and personnel to produce 
an acceptable joint.
    (8) Figure 56.30-10(b), Method 8. Welding neck flanges may be used 
on any piping provided the flanges are butt-welded to the pipe. The 
joint shall be welded as indicated by Figure 56.30-10(b), Method 8, and 
a backing ring employed which will permit complete penetration of the 
weld metal. If a backing ring is not used, refer to Sec. 56.30-5(b) for 
requirements.
    (9) Figure 56.30-10(b), Method 9. Welding neck flanges may also be 
attached to pipe by a double-welded butt joint as shown by Figure 56.30-
10(b), Method 9.
    (10) Figure 56.30-10(b), Method 10. Flanges may be attached by 
shrinking the flange on to the end of the pipe and flaring the end of 
the pipe to an angle of not less than 20 deg.. A fillet weld of the size 
shown by Figure 56.30-10(b), Method 10, shall be used to attach the hub 
to the pipe. This type of flange is limited to a maximum pressure of 300 
pounds per square inch at temperatures not exceeding 500 deg. F.
    (11) Figure 56.30-10(b), Method 11. The flange of the type described 
and illustrated by Figure 56.30-10(b), Method 10, except with the fillet 
weld omitted, may be used for Class II piping for pressures not 
exceeding 150 pounds per square inch and temperatures not exceeding 
450 deg. F.
    (12) Figure 56.30-10(b), Method 12. High-hub bronze flanges may be 
used for temperatures not exceeding 425 deg. F. The hub of the flange 
shall be bored to a depth not less than that required for a threaded 
connection of the same diameter leaving a shoulder for the pipe to butt 
against. A preinserted ring of silver brazing alloy having a melting 
point not less than 1,000 deg. F. and of sufficient quantity to fill the 
annular clearance between the flange and the pipe shall be inserted in 
the groove. The pipe shall then be inserted in the flange and sufficient 
heat applied externally to melt the brazing alloy until it completely 
fills the clearance between the hub and the flange of the pipe. A 
suitable flux shall be applied to the surfaces to be joined to produce a 
satisfactory joint.
    (13) Figure 56.30-10(b), Method 13. The type of flange as described 
for Figure 56.30-10(b), Method 12, may be employed and in lieu of an 
annular groove being machined in the hub of the flange for the 
preinserted ring of silver brazing alloy, a bevel may be machined on the 
end of the hub and the silver brazing alloy introduced from the end of 
the hub to attach the pipe to the flange.
    (14) Figure 56.30-10(b), Method 14. Flanges may be attached to 
nonferrous pipe by inserting the pipe in the flange and flanging the end 
of the pipe into the recess machined in the face of the flange to 
receive it. The width of the flange shall be not less than three times 
the pipe wall thickness. In addition, the pipe shall be securely brazed 
to the wall of the flange.
    (15) Figure 56.30-10(b), Method 15. The flange of the type described 
and illustrated by Figure 56.30-10(b), Method 14,

[[Page 180]]

except with the brazing omitted, may be used for Class II piping and 
where the temperature does not exceed 250 deg. F.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40605, Oct. 2, 1989]



Sec. 56.30-15   Expanded or rolled joints.

    (a) Expanded or rolled joints may be used where experience or test 
has demonstrated that the joint is suitable for the design conditions 
and where adequate provisions are made to prevent separation of the 
joint. Specific application for use must be made to the Commandant.



Sec. 56.30-20  Threaded joints.

    (a) Threaded joints may be used within the limitations specified in 
subpart 56.15 of this chapter and within other limitations specified in 
this section.
    (b) (Reproduces 114.1.) All threads on piping components must be 
taper pipe threads in accordance with the applicable standard listed in 
Table 56.60-1(b). Threads other than taper pipe threads may be used for 
piping components where tightness of the joint depends on a seal weld or 
a seating surface other than the threads, and where experience or test 
has demonstrated that such threads are suitable.
    (c) Threaded joints may not be used where severe erosion, crevice 
corrosion, shock, or vibration is expected to occur; or at temperatures 
over 925  deg.F. Size limitations are given in Table 56.30-20(c) of this 
section.

                Table 56.30-20(c)--Threaded Joints\1\\2\                
------------------------------------------------------------------------
       Maximum nominal size, inches          Maximum pressure, p.s.i.g. 
------------------------------------------------------------------------
Above 2''.................................  (Not permitted in Class I   
                                             piping service.)           
Above 1'' up to 2''.......................  600.                        
Above \3/4\'' up to 1''...................  1,200.                      
\3/4\'' and below.........................  1,500.                      
------------------------------------------------------------------------
\1\Further restrictions on the use of threaded joints appear in the low 
  temperature piping section.                                           
\2\Threaded joints in hydraulic systems are permitted above the         
  pressures indicated for the nominal sizes shown when commercially     
  available components such as pumps, valves and strainers may only be  
  obtained with threaded connections.                                   

    (d) Pipe with a wall thickness less than that of standard weight of 
ANSI B36.10 steel pipe must not be threaded regardless of service. For 
additional threading limitations for pipe used in steam service over 250 
pounds per square inch or water service over 100 pounds per square inch 
and 200  deg.F, see part 104.1.2(c)(1) of ANSI B31.1. Restrictions as to 
the use of threaded joints appear for low temperature piping and should 
be checked when designing for these systems.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40164, Sept. 2, 1975; CGD 77-
140, 54 FR 40606, Oct. 2, 1989]



Sec. 56.30-25  Flared, flareless, and compression fittings.

    (a) This section applies to pipe fittings that are mechanically 
connected to pipe by such means as ferrules, flared ends, swaging, 
elastic strain preload, crimping, bite-type devices, and shape memory 
alloys. Fittings to which this section applies must be designed, 
constructed, tested, and marked in accordance with ASTM F 1387-93. 
Previously approved fittings may be retained as long as they are 
maintained in good condition to the satisfaction of the Officer in 
Charge, Marine Inspection.
    (b) Flared, flareless and compression fittings may be used within 
the service limitations of size, pressure, temperature, and vibration 
recommended by the manufacturer and as specified in this section.
    (c) Flared, flareless, and compression type tubing fittings may be 
used for tube sizes not exceeding 50 millimeters (2 inches) outside 
diameter within the limitations of applicable standards and 
specifications listed in this section and Sec. 56.60-1 of this part.
    (d) Flareless fittings must be of a design in which the gripping 
member or sleeve must grip or bite into the outer surface of the tube 
with sufficient strength to hold the tube against pressure, but without 
appreciably distorting the inside tube diameter or reducing the wall 
thickness. The gripping member must also form a pressure seal against 
the fitting body.
    (e) For fluid services, other than hydraulic systems, using a 
combustible fluid as defined in Sec. 30.10-15 of this chapter and for 
fluid services using a flammable fluid as defined in Sec. 30.10-22 of 
this chapter, flared fittings must be used; except that flareless 
fittings of

[[Page 181]]

the nonbite type may be used when the tubing system is of steel, nickel 
copper or copper nickel alloy. When using copper or copper zinc alloy, 
flared fittings are required. (See also Sec. 56.50-70 for gasoline fuel 
systems, Sec. 56.60-75 for diesel fuel systems, and Sec. 58.25-20 for 
hydraulic systems for steering gear.)

[CGD 95-027, 61 FR 26000, May 23, 1996; 61 FR 35138, July 5, 1996]



Sec. 56.30-27  Caulked joints.

    Caulked joints may not be used in marine installations.

[CGD 77-140, 54 FR 40606, Oct. 2, 1989]



Sec. 56.30-30   Brazed joints.

    (a) General (refer also to subpart 56.75). Brazed socket-type joints 
shall be made with suitable brazing alloys. The minimum socket depth 
shall be sufficient for the intended service. Brazing alloy shall either 
be end-fed into the socket or shall be provided in the form of a 
preinserted ring in a groove in the socket. The brazing alloy shall be 
sufficient to fill completely the annular clearance between the socket 
and the pipe or tube.
    (b) Limitations. (1) Brazed socket-type joints shall not be used on 
systems containing flammable or combustible fluids in areas where fire 
hazards are involved or where the service temperature exceeds 425 deg. 
F. When specifically approved by the Commandant, brazed construction may 
be used for service temperatures up to 525 deg. F. in boiler steam air 
heaters provided the requirements of UB-12 of section VIII of the ASME 
Code are satisfied at the highest temperature desired.
    (2) Brazed joints depending solely upon a fillet, rather than 
primarily upon brazing material between the pipe and socket are not 
acceptable.



Sec. 56.30-35  Gasketed mechanical couplings.

    (a) This section applied to pipe fittings that form a seal by 
compressing a resilient gasket onto the pipe joint primarily by threaded 
fasteners and where joint creep is only restricted by such means as 
machined grooves, centering pins, or welded clips. Fittings to which 
this section applies must be designed, constructed, tested, and marked 
in accordance with ASTM F 1476-93 and ASTM F 1548-94. Previously 
approved fittings may be retained as long as they are maintained in good 
condition to the satisfaction of the Officer in Charge, Marine 
Inspection.
    (b) Gasketed mechanical couplings may be used within the service 
limitations of pressure, temperature and vibration recommended by the 
manufacturer, except that gasketed mechanical couplings must not be used 
in--
    (1) Any location where leakage, undetected flooding or impingement 
of liquid on vital equipment may disable the vessel; or
    (2) In tanks where the liquid conveyed in the piping system is not 
chemically compatible with the liquid in the tank.
    (c) Gasketed mechanical couplings must not be used as expansion 
joints. Positive restraints must be included, where necessary, to 
prevent the coupling from creeping on the pipe and uncovering the joint. 
Bite-type devices do not provide positive protection against creep and 
are generally not accepted for this purpose. Machined grooves, centering 
pins, and welded clips are considered positive means of protection 
against creep.

[CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 56.30-40  Flexible pipe couplings of the compression or slip-on type.

    (a) Flexible pipe couplings of the compression or slip-on type must 
not be used as expansion joints. To ensure that the maximum axial 
displacement (approximately \3/8\'' maximum) of each coupling is not 
exceeded, positive restraints must be included in each installation.
    (b) Positive means must also be provided to prevent the coupling 
from ``creeping'' on the pipe and uncovering the joint. Bite type 
devices do not provide positive protection against creeping and are not 
generally accepted for this purpose unless other means are also 
incorporated. Machined grooves or centering pins are considered positive 
means, and other positive means will be considered.
    (c) Couplings which employ a solid sleeve with welded attachments on 
both pipes will require the removal of

[[Page 182]]

one set of attachments before dismantling. Rewelding of the attachments 
may require gas freeing of the line.
    (d) The installation shall be such as to preclude appreciable 
difference in the vibration magnitudes of the pipes joined by the 
couplings. The couplings shall not be used as a vibration damper. The 
vibration magnitude and frequency should not exceed that recommended by 
the coupling manufacturer.
    (e) Flexible couplings made in accordance with the applicable 
standards listed in Table 56.60-1(b) of this part and of materials 
complying with subpart 56.60 of this part may be used within the 
material, size, pressure, and temperature limitations of those standards 
and within any further limitations specified in this subchapter. 
Flexible couplings fabricated by welding must also comply with part 57 
of this chapter.
    (f) Flexible couplings must not be used in cargo holds or in any 
other space where leakage, undetected flooding, or impingement of liquid 
on vital equipment may disable the ship, or in tanks where the liquid 
conveyed in the piping system is not compatible with the liquid in the 
tank. Where flexible couplings are not allowed by this subpart, joints 
may be threaded, flanged and bolted, or welded.
    (g) Damaged or deteriorated gaskets shall not be reinstalled.
    (h) Each coupling shall be tested in accordance with Sec. 56.97-5.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40606, Oct. 2, 1989]



           Subpart 56.35--Expansion, Flexibility and Supports



Sec. 56.35-1  Pipe stress calculations (replaces 119.7).

    (a) A summary of the results of pipe stress calculations for the 
main and auxiliary steam piping where the design temperatures exceed 800 
 deg.F shall be submitted for approval. Calculations shall be made in 
accordance with one of the recognized methods of stress analysis 
acceptable to the Marine Safety Center to determine the magnitude and 
direction of the forces and movements at all terminal connections, 
anchor and junction points, as well as the resultant bending stress, 
longitudinal pressure stress, torsional stress, and combined expansion 
stress at all such points. The location of the maximum combined stress 
shall be indicated in each run of pipe between anchor points.
    (b) Special consideration will be given to the use of the full 
tabulated value of S in computing Sh and Sc where all material 
used in the system is subjected to additional nondestructive testing as 
specified by the Marine Safety Center, and where the calculations 
prescribed in 119.6.4 and 102.3.2 of ANSI-B31.1 and Sec. 56.07-10 are 
performed. The nondestructive testing procedures and method of stress 
analysis shall be approved by the Marine Safety Center prior to the 
submission of computations and drawings for approval.

[CGD 77-140, 54 FR 40607, Oct. 2, 1989]



Sec. 56.35-10  Nonmetallic expansion joints (replaces 119.5.1).

    (a) Nonmetallic expansion joints certified in accordance with 
subpart 50.25 of this subchapter are acceptable for use in piping 
systems.
    (b) Nonmetallic expansion joints must conform to the standards 
listed in Table 56.60-1(b) of this part. Nonmetallic expansion joints 
may be used within their specified pressure and temperature rating in 
vital and nonvital machinery sea connections inboard of the skin valve. 
These joints must not be used to correct for improper piping workmanship 
or misalignment. Joint movements must not exceed the limits set by the 
joint manufacturer.

[CGD 77-140, 54 FR 40607, Oct. 2, 1989]



Sec. 56.35-15  Metallic expansion joints (replaces 119.5.1).

    (a) Metallic expansion joints certified in accordance with subpart 
50.25 of this subchapter are acceptable for use in piping systems.
    (b) Metallic expansion joints must conform to the standards listed 
in Table 56.60-1(b) of this part and may be used within their specified 
pressure and temperature rating.

[CGD 77-140, 54 FR 40607, Oct. 2, 1989]

[[Page 183]]



    Subpart 56.50--Design Requirements Pertaining to Specific Systems



Sec. 56.50-1  General (Replaces 122.6 through 122.10).

    The piping requirements in this subpart shall apply in lieu of 
requirements in 122.6 through 122.10 of ANSI-B31.1. Installation 
requirements applicable to all systems:
    (a) Where pipes and scuppers are carried through watertight or 
oiltight bulkheads, decks or tank tops, or are carried through fire 
control bulkheads and decks, the integrity of the structure shall be 
maintained. Lead or other heat sensitive materials shall not be used in 
piping systems which make such bulkhead or deck penetrations where the 
deterioration of such systems in the event of fire would impair the 
integrity of the bulkheads or decks. (For plastic pipe installations, 
see Sec. 56.60-25(a).) Where plate insert pads are used, bolted 
connections shall have threads tapped into the plate to a depth of not 
less than the diameter of the bolt. If welded, the pipe or flange shall 
be welded to both sides of the plating. Openings in structure through 
which pipes pass shall be reinforced where necessary. Flanges shall not 
be bolted to bulkheads so that the plate forms a part of the joint. 
Metallic materials having a melting point of 1,700 deg. F. or less are 
considered heat sensitive and if used must be suitably insulated.
    (b)(1) Pipes piercing the collision bulkhead shall be fitted with 
screwdown valves operable from above the bulkhead deck and the valve 
shall be fitted inside the forepeak tank adjacent to the collision 
bulkhead. The pipe penetrating the collision bulkhead shall be welded to 
the bulkhead on both sides. On new installations or replacement in 
vessels of 150 gross tons and over, the valve body shall be of steel or 
ductile cast iron.
    (2) Passenger vessels shall not have the collision bulkhead pierced 
below the margin line by more than one pipe conveying liquids in the 
forepeak tank except that if the forepeak tank is divided to hold two 
different kinds of liquids, the collision bulkhead may be pierced below 
the margin line by two pipes, provided there is no practical alternative 
to the fitting of the second pipe and further provided the safety of the 
vessel is maintained.
    (c) Valves and cocks not forming part of a piping system are not 
permitted in watertight subdivision bulkheads, however, sluice valves or 
gates in oiltight bulkheads of tankships may be used if approved by the 
Marine Safety Center.
    (d) Piping shall not be run over or in the vicinity of switchboards 
or other electrical equipment if avoidable. When such leads are 
necessary, welded joints only shall be used and provision shall be made 
to prevent leakage from damaging the equipment.
    (e) Stuffing boxes shall not be used on deep tank bulkheads, double 
bottoms or in any position where they cannot be easily examined. This 
requirement does not apply to ore carriers operating on the Great Lakes 
or cargo lines of oil tankers.
    (f) Piping systems shall be installed so that under no condition 
will the operation of safety or relief valves be impaired.
    (g)(1) Power actuated valves in systems other than as specified in 
Sec. 56.50-60 of this part may be used if approved for the system by the 
Marine Safety Center. All power actuated valves required in an emergency 
to operate the vessel's machinery, to maintain its stability, and to 
operate the bilge and firemain systems must have a manual means of 
operation.
    (2)(i) Remote valve controls that are not readily identifiable as to 
service must be fitted with nameplates.
    (ii) Remote valve controls must be accessible under service 
conditions.
    (iii) Remote valve controls, except reach rods, must be fitted with 
indicators that show whether the valves they control are open or closed. 
Valve position indicating systems must be independent of valve control 
systems.
    (iv) Valve reach rods must be adequately protected.
    (v) Solid reach rods must be used in tanks containing liquids, 
except that tank barges having plug cocks inside cargo tanks may have 
reach rods of extra-heavy pipe with the annular space between the 
lubricant tube and the pipe wall sealed with a nonsoluble to prevent 
penetration of the cargo.

[[Page 184]]

    (3) Air operated remote control valves must be provided with self-
indicating lines at the control boards which indicate the desired valve 
positions, i.e., open or closed.
    (h) Suitable drains shall be provided at low points of piping 
systems.
    (i) Valves and cocks shall be located so as to be easily accessible 
and valves or cocks attached to the shell of the vessel or to sea chests 
located below the floorplating shall be operable from above the 
floorplates.
    (j) When welded fabrication is employed, a sufficient number of 
detachable joints shall be provided to facilitate overhauling and 
maintenance of machinery and appurtenances. The joints shall be located 
so that adequate space is provided for welding, and the location of the 
welds shall be indicated on the plans.
    (k) Piping, including valves, pipe fittings and flanges, conveying 
vapors, gases or liquids whose temperature exceeds 150 deg. F., shall be 
suitably insulated where necessary to preclude injury to personnel.
    (l) Where pipes are run through dry cargo spaces they must be 
protected from mechanical injury by a suitable enclosure or other means.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40607, Oct. 2, 1989]



Sec. 56.50-10   Special gaging requirements.

    (a) Where pressure reducing valves are employed (see 102.2.5(b) of 
ANSI-B31.1) a pressure gage shall be provided on the low pressure side 
of the reducing station.
    (b) Fuel oil service, fire, cargo and fuel oil transfer and boiler 
feed pumps must be provided with a pressure gage on the discharge side 
of the pump. Additional information pertaining to fire pumps is in 
Sec. 34.10-5 of subchapter D (Tank Vessels), Sec. 76.10-5 of subchapter 
H (Passenger Vessels), Sec. 95.10-5 of subchapter I (Cargo and 
Miscellaneous Vessels), and Sec. 108.417 of subchapter IA (Mobile 
Offshore Drilling Units) of this chapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-251, 43 FR 56799, Dec. 4, 1978]



Sec. 56.50-15   Steam and exhaust piping.

    (a) The design pressures of the steam piping connected to the boiler 
drum or to the superheater inlet header shall not be less than the 
lowest pressure setting of any drum safety valve. The value of allowable 
stress for the material shall not exceed that corresponding to the 
saturated steam temperature at drum pressure and shall be selected as 
described in Sec. 56.07-10(e).
    (b) Main superheater outlet piping systems, desuperheated piping 
systems, and other auxiliary superheated piping systems led directly 
from the boiler superheater shall be designed for a pressure not less 
than the pressure at which the superheater safety valve is set. In the 
case of a superheated safety valve which is drum pilot actuated, the 
design pressure of such piping systems shall not be less than the 
pressure setting of the actuator valve on the drum. Where it can be 
shown that the limitations set forth in 102.2.4 of ANSI-B31.1 will not 
be exceeded, the design pressure of such piping systems may be reduced 
but shall not be less than the pressure setting of the actuator valve on 
the drum less the pressure drop through the superheater, including 
associated piping and a control desuperheater if fitted, at the normal 
rated operating condition. In both cases, the value of allowable stress 
shall be selected using a temperature not less than that of the steam at 
the superheater outlet at the normal rated operating conditions in 
accordance with Sec. 56.07-10(e). Valves and fittings shall be selected 
for the above temperature and pressure from the accepted standards in 
Table 56.60-1(b), using the pressure-temperature rating in the standard.
    (c) Steam stop valves in sizes exceeding 6 inches shall be fitted 
with bypasses for heating the line and equalizing the pressure before 
the valve is opened.
    (d) In multiple boiler installations each boiler's main, auxiliary 
and desuperheated steam lines shall be fitted with two valves, one a 
stop valve and one a stop check valve.
    (e) Main and auxiliary steam stop valves must be readily accessible, 
operable by one person and arranged to seat against boiler pressure.

[[Page 185]]

    (f) Where vessels are equipped with more than one boiler, the 
auxiliary steam piping shall be so arranged that steam for the whistle, 
steering gear, and electric-lighting plant may be supplied from any 
power boiler.
    (g) Steam and exhaust pipes shall not be led through coal bunkers or 
dry cargo spaces unless approved by the Commandant.
    (h)(1) Steam piping, with the exception of the steam heating system, 
must not be led through passageways, accommodation spaces, or public 
spaces unless the arrangement is specifically approved by the Marine 
Safety Center.
    (2) Steam pressure in steam heating systems must not exceed 150 
pounds per square inch gage, except that steam pressure for 
accommodation and public space heating must not exceed 45 pounds per 
square inch gage.
    (3) Steam lines and registers in non-accommodation and non-public 
spaces must be suitably lcoated and/or shielded to minimize hazards to 
any personnel within the space. Where hazards in a space cannot be 
sufficiently minimized, the pressure in the steam line to that space 
must be reduced to a maximum of 45 pounds per square inch gage.
    (4) High temperature hot water for heating systems may not exceed 
375  deg.F.
    (i) Where positive shutoff valves are fitted in the exhaust lines of 
machinery, and the exhaust side, including engine steam cylinders and 
chests, turbine casings, exhaust piping and shutoff valves, is not 
designed for the full inlet pressure, the exhaust side must be protected 
from over pressure by one of the following means:
    (1) A full flow relief valve in the exhaust side so set and of 
sufficient capacity to prevent the exhaust side from being accidentally 
or otherwise subjected to a pressure in excess of its maximum allowable 
pressure.
    (2) A sentinel relief valve or other warning device fitted on the 
exhaust side together with a back pressure trip device which will close 
the inlet valve prior to the exhaust side pressure exceeding the maximum 
allowable pressure. A device that will throttle the inlet valve, so that 
the exhaust side does not exceed the maximum allowable pressure, may be 
substituted for the back pressure trip.
    (j) Shore steam connections shall be fitted with a relief valve set 
at a pressure not exceeding the design pressure of the piping.
    (k) Means must be provided for draining every steam pipe in which 
dangerous water hammer might otherwise occur.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 73-
254, 40 FR 40165, Sept. 2, 1975; CGD 77-140, 54 FR 40607, Oct. 2, 1989; 
CGD 83-043, 60 FR 24772, May 10, 1995]



Sec. 56.50-20   Pressure relief piping.

    (a) General. There must be no intervening stop valves between the 
vessel or piping system being protected and its protective device or 
devices, except as specifically provided for in other regulations or as 
specifically authorized by the Marine Safety Center.
    (b) Discharge lines (reproduces 122.6.2(d)). Discharge lines from 
pressure-relieving safety devices shall be designed to facilitate 
drainage.
    (c) Stop valves. Stop valves between the safety or relief valve and 
the point of discharge are not permitted, except as specifically 
provided for in other regulations or as specifically approved by the 
Marine Safety Center.
    (d) Reference. See also Sec. 56.07-10(a) and (b) for specific 
requirements.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 77-140, 54 FR 40607, Oct. 2, 1989]



Sec. 56.50-25   Safety and relief valve escape piping.

    (a) Escape piping from unfired steam generator, boiler, and 
superheater safety valves shall have an area of not less than that of 
the combined areas of the outlets of all valves discharging thereto and 
shall be led as near vertically as practicable to the atmosphere.
    (b) Expansion joints or flexible pipe connections shall be fitted in 
escape piping. The piping shall be adequately supported and installed so 
that no stress is transmitted to the safety valve body.
    (c) Safety or relief valve discharges, when permitted to terminate 
in the machinery space, shall be led below the floorplates or to a 
remote position to

[[Page 186]]

minimize the hazardous effect of the escaping steam.
    (d) The effect of the escape piping on the operation of the relief 
device shall be considered. The back pressure in the escape piping from 
the main propulsion steam generator should not exceed 10 percent of the 
relief device setting unless a compensated relief device is used. Back 
pressure must be calculated with all relief valves which discharge to a 
common escape pipe relieving simultaneously at full capacity.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40608, Oct. 2, 1989; CGD 95-012, 60 FR 48050, Sept. 18, 1995]



Sec. 56.50-30   Boiler feed piping.

    (a) General requirements. (1) Steam vessels, and motor vessels 
fitted with steam driven electrical generators shall have at least two 
separate means of supplying feed water for the boilers. All feed pumps 
shall be fitted with the necessary connections for this purpose. The 
arrangement of feed pumps shall be in accordance with paragraph (d) or 
(e) of this section.
    (2) Feed pump supply to power boilers may utilize the group feed 
system or the unit feed system.
    (3) Feed discharge piping from the pump up to, but not including the 
required stop and stop-check valves, shall be designed for either the 
feed pump relief valve setting or the shutoff head of the pump if a 
relief valve is not fitted. (Refer to Sec. 56.07-10(b) for specific 
requirements.) Feed piping from the boiler, to and including the 
required stop and stop-check valves (see paragraph (b) of this section), 
shall have a design pressure which exceeds the maximum allowable working 
pressure of the boiler by either 25 percent or 225 pounds per square 
inch whichever is less. The value of allowable stress for design 
purposes shall be selected as described in Sec. 56.07-10(e) at a 
temperature not below that for saturated steam at the maximum allowable 
working pressure of the boiler.
    (4) Feed pumps for water tube boilers shall have fresh water 
connections only. Care shall be taken to prevent the accidental 
contamination of feed water from salt water or oil systems.
    (b) Feed valves. (1) Stop and stop-check valves shall be fitted in 
the main feed line and shall be attached as close as possible to drum 
feed inlet nozzles or to the economized feed inlet nozzles on boilers 
fitted with integral economizers.
    (2) Where the installation will not permit the feed stop valve to be 
attached directly to the drum inlet nozzle on boilers not fitted with 
economizers, a distance piece may be installed between the stop valve 
and the inlet nozzle.
    (3) Feed stop or stop-check valves may be located near the operating 
platform on boilers fitted with economizers provided the piping between 
the valves and the economizer, exclusive of the feed valves and the 
economizer inlet nozzles, is installed with a minimum of intervening 
flanged connections.
    (4) Auxiliary feed lines shall be fitted with stop valves and stop-
check valves. Boilers not having auxiliary feed water nozzles, or where 
independent auxiliary feed lines are not installed, shall have the 
auxiliary feed line to the drum or economizer connected to the main feed 
line as close as possible to the main feed stop valves; and the valves 
in the auxiliary feed line shall be fitted as close as possible to the 
junction point.
    (5) Boilers fitted with economizers shall have a check valve fitted 
in the economizer discharge and located as close as possible to the drum 
fed inlet nozzle. When economizer bypasses are fitted, a stop-check 
valve shall be installed in lieu of the aforementioned check valve.
    (6) A sentinel valve shall be fitted to an economizer when a valved 
bypass is installed.
    (c) Feed water regulators, heaters, and grease extractors. (1) Where 
feed water regulators, tubular feed water heaters, and grease extractors 
are installed, an alternate means of operation with these devices 
bypassed shall be provided.
    (2) Feed water regulators designed with a built-in bypass for 
emergency use need not be fitted with an external bypass when installed 
in a feed system provided with an auxiliary feed line. All feed water 
regulators installed in a unit feed system shall be fitted with an 
external bypass. Feed water regulators bypasses shall be so arranged 
that the

[[Page 187]]

regular feed valves are in operation while the bypass is in use.
    (3) A feed water regulator may be interposed between the stop and 
stop-check valves in the feed lines.
    (d) Group feed system. Group feed systems shall be provided with 
pumps and piping as follows:
    (1) Oceangoing and Great Lakes steam vessels, having a feed pump 
attached to the main propelling unit, shall be provided with at least 
one independently driven feed pump. Each of these pumps shall be used 
exclusively for feed purposes and shall be capable of supplying the 
operating boilers at their normal capacity. In addition, a second 
independently driven pump, capable of supplying such boilers at 75 
percent of their normal capacity, shall be provided for emergency use. 
This second pump may be used for other purposes.
    (2) If two independently driven pumps are provided, each capable of 
supplying the boilers at their normal required operating capacity, and 
neither of which is used for other purposes, the third or emergency feed 
pump is not required. Where more than two independently driven feed 
pumps are provided, their aggregate capacity shall not be less than 200 
percent of that demanded by the boilers at their required normal 
operating capacity.
    (3) River or harbor steam vessels shall have at least two means for 
feeding the boilers; one of which shall be an independently driven pump, 
the other may be an attached pump, an additional independently driven 
pump, or an injector.
    (e) Unit feed system. Unit feed systems shall be provided with pumps 
and piping as follows:
    (1) The unit feed system may be used on vessels having two or more 
boilers. When the unit feed system is employed each boiler shall have 
its own independently driven main feed pump capable of supplying the 
boiler at its normal operating capacity. In addition these shall be an 
auxiliary independently driven feed pump of the same capacity which can 
be operated in place of and in conjunction with the main feed pump. In 
vessels with three or more boilers, not more than two boilers may be 
served by any one auxiliary pump. The auxiliary pump may be so 
interconnected that any pump can feed any boiler.
    (2) In the unit feed system, a separate feed line shall be provided 
for each boiler from its pumps. A separate auxiliary feed line is not 
required. The discharge from each pump and the feed supply to each 
boiler shall be automatically controlled by the level of the water in 
that boiler. In addition to the automatic control, manual control shall 
be provided.
    (f) Feedwater. The feedwater shall be introduced into a boiler as 
required by Sec. 52.01-105(b) of this subchapter.



Sec. 56.50-35   Condensate pumps.

    Two means shall be provided for discharging the condensate from the 
main condenser, one of which shall be mechanically independent of the 
main propelling machinery. If one of the independent feed pumps is 
fitted with a direct suction from the condenser and a discharge to the 
feed tank, it may be accepted as an independent condensate pump. On 
vessels operating on lakes (including Great Lakes), bays, sounds, or 
rivers, where provision is made to operate noncondensing, only one 
condensate unit will be required.



Sec. 56.50-40   Blowoff piping (replaces 102.2.5(d)).

    (a)(1) The requirements for blowoff piping in this section shall be 
followed in lieu of the requirements in 102.2.5(d) in ANSI-B31.1.
    (2) Where blowoff valves are connected to a common discharge from 
two or more boilers, a nonreturn valve shall be provided in the line 
from each boiler to prevent accidental blowback in the event the boiler 
blowoff valve is left open.
    (b) Blowoff piping external to the boiler shall be designed for not 
less than 125 percent of the maximum allowable working pressure of the 
boiler, or the maximum allowable working pressure of the boiler plus 225 
pounds per square inch, whichever is less. When the required blowoff 
piping design pressure exceeds 100 pounds per square inch gage, the wall 
thickness of the piping shall not be less than Schedule 80. The value of 
allowable stress for

[[Page 188]]

design purposes shall be selected as described in Sec. 56.07-10(e) at a 
temperature not below that of saturated steam at the maximum allowable 
working pressure of the boiler.
    (c) Boiler blowoff piping which discharges above the lightest 
loadline of a vessel shall be arranged so that the discharge is 
deflected downward.
    (d) Valves such as the globe type so designed as to form pockets in 
which sediment may collect shall not be used for blowoff service.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975]



Sec. 56.50-45   Circulating pumps.

    (a) A main circulating pump and emergency means for circulating 
water through the main condenser shall be provided. The emergency means 
may consist of a connection from an independent power pump fitted 
between the main circulating pump and the condenser.
    (b) Independent sea suctions shall be provided for the main 
circulating and the emergency circulating pumps.
    (c) A cross connection between the circulating pumps in the case of 
multiple units will be acceptable in lieu of an independent power pump 
connection.
    (d) On vessels operating on lakes (including Great Lakes), bays, 
sounds, or rivers, where provision is made to operate noncondensing, 
only one circulating unit will be required.



Sec. 56.50-50  Bilge and ballast piping.

    (a)(1) All vessels except unmanned barges shall be provided with a 
satisfactory bilge pumping plant capable of pumping from and draining 
any watertight compartment except for ballast, oil and water tanks which 
have acceptable means for filling and emptying independent of the bilge 
system. The bilge pumping system shall be capable of operation under all 
practicable conditions after a casualty whether the ship is upright or 
listed. For this purpose wing suctions will generally be necessary 
except in narrow compartments at the ends of the vessel where one 
suction may be sufficient. In compartments of unusual form, additional 
suctions may be required.
    (2) Arrangements shall be made whereby water in the compartments 
will drain to the suction pipes. Efficient means shall be provided for 
draining water from all tank tops, other watertight flats and insulated 
holds. Peak tanks, chain lockers and decks over peak tanks may be 
drained by eductors, ejectors, or hand pumps. Where piping is led 
through the forepeak, see Sec. 56.50-1(b).
    (3) Where drainage from particular compartments is considered 
undesirable, the provisions for such drainage may be omitted, provided 
it can be shown by calculations that the safety of the vessel will not 
be impaired.
    (4) Where the vessel is to carry Class 3 flammable liquids with a 
flashpoint below 23 deg.C (74 deg.F), Class 6, Division 6.1, poisonous 
liquids, or Class 8 corrosive liquids with a flashpoint below 23 deg.C 
(74 deg.F) as defined in 49 CFR part 173, in enclosed cargo spaces, the 
bilge-pumping system must be designed to ensure against inadvertent 
pumping of such liquids through machinery-space piping or pumps.
    (5) For each vessel constructed on or after June 9, 1995, and on an 
international voyage, arrangements must be made to drain the enclosed 
cargo spaces on either the bulkhead deck of a passenger vessel or the 
freeboard deck of a cargo vessel.
    (i) If the deck edge, at the bulkhead deck of a passenger vessel or 
the freeboard deck of a cargo vessel, is immersed when the vessel heels 
5 deg. or less, the drainage of the enclosed cargo spaces must discharge 
to a space, or spaces, of adequate capacity, each of which has a high-
water-level alarm and a means to discharge overboard. The number, size 
and arrangement of the drains must prevent unreasonable accumulation of 
water. The pumping arrangements must take into account the requirements 
for any fixed manual or automatic sprinkling system. In enclosed cargo 
spaces fitted with carbon-dioxide extinguishing systems, the drains must 
have traps or other means to prevent escape of the smothering gas. The 
enclosed cargo spaces must not drain to machinery spaces or other spaces 
where sources of ignition may be present if water may be contaminated 
with Class 3 flammable liquids;

[[Page 189]]

Class 6, Division 6.1, poisonous liquids; or Class 8 corrosive liquids 
with a flashpoint below 23 deg.C (74 deg.F).
    (ii) If the deck edge, at the bulkhead deck of a passenger vessel or 
the freeboard deck of a cargo vessel, is immersed only when the vessel 
heels more than 5 deg., the drainage of the enclosed cargo spaces may be 
by means of a sufficient number of scuppers discharging overboard. The 
installation of scuppers must comply with Sec. 42.15-60 of this chapter.
    (b) Passenger vessels shall have provision made to prevent the 
compartment served by any bilge suction piping from being flooded in the 
event the pipe is severed or otherwise damaged by collision or grounding 
in any other compartment. Where the piping is located within one-fifth 
of the beam of the side of the vessel (measured at right angles to the 
centerline at the level of the deepest subdivision loadline or deepest 
loadline where a subdivision loadline is not assigned) or is in a 
ductkeel, a nonreturn valve shall be fitted to the end of the pipe in 
the compartment which it serves.
    (c)(1) Each bilge suction must lead from a manifold except as 
otherwise approved by the Commanding Officer, Marine Safety Center. As 
far as practicable, each manifold must be in, or be capable of remote 
operation from, the same space as the bilge pump that normally takes 
suction on that manifold. In either case, the manifold must be capable 
of being locally controlled from above the floorplates and must be 
easily accessible at all times. As far as practicable, each overboard-
discharge valve for a bilge system must comply with the requirements 
governing location and accessibility for suction manifolds. Except as 
otherwise permitted by paragraph (c)(4) of this section for a vessel 
employing a common-rail bilge system, each bilge-manifold valve 
controlling a bilge suction from any compartment must be of the stop-
check type.
    (2) Each passenger vessel on an international voyage must have 
manifolds, where installed, and valves in the bilge-pumping system 
arranged so that, in case of flooding, one of the bilge pumps can take 
suction from any compartment and, further, so that damage to a pump or 
its piping connecting to the bilge main outboard of a line drawn at one-
fifth of the beam of the vessel will not render the bilge system 
inoperative.
    (3) If a bilge system common to all pumps is installed on passenger 
vessels engaged on international voyages, the necessary valves for 
controlling the bilge suctions shall be operable from above the bulkhead 
deck. If, in addition to the main bilge pumping system, an emergency 
bilge pumping system is installed, it shall be independent of the main 
system and so arranged that a pump is capable of operating on any 
compartment under flooding conditions. In such cases, only the valves 
necessary for the operation of the emergency bilge system need be 
capable of being operated from above the bulkhead deck.
    (4) A common-rail bilge system may be installed as an acceptable 
alternative to the system required by paragraph (c)(1) of this section, 
provided it satisfies all of the following criteria:
    (i) The common-rail main runs inboard at least one-fifth of the beam 
of the vessel.
    (ii) A stop-check valve or both a stop valve and a check valve are 
provided in each branch line and located inboard at least one-fifth of 
the beam of the vessel.
    (iii) The stop valve or the stop-check valve is power-driven, is 
capable of remote operation from the space where the pump is, and, 
regardless of the status of the power system, is capable of manual 
operation to both open and close the valve.
    (iv) The stop valve or the stop-check valve is accessible for both 
manual operation and repair under all operating conditions, and the 
space used for access contains no expansion joint or flexible coupling 
that, upon failure, would cause flooding and prevent access to the 
valve.
    (v) A port and a starboard suction serve each space protected 
unless, under the worst conditions of list and trim and with liquid 
remaining after pumping, the vessel's stability remains acceptable, in 
accordance with subchapter S of this chapter.
    (vi) For each vessel designed for the carriage of combinations of 
both liquid

[[Page 190]]

and dry bulk cargoes (O/B/O), no bilge pump or piping is located in a 
machinery space other than in a pump room for cargo, and no liquid and 
other cargoes are carried simultaneously.
    (vii) For each cargo vessel in Great Lakes service, each common-rail 
piping for the bilge and ballast system serving cargo spaces, if 
installed and if connected to a dedicated common-rail bilge system, must 
lead separately from a valved manifold located at the pump.
    (d) The internal diameter of bilge suction pipes including strainers 
shall be determined by formulas (1) and (2), except that the nearest 
commercial size not more than one-fourth inch under the required 
diameter may be used. Bilge suction pipes shall be suitably faired to 
pump inlets.
    (1) For suctions to each main bilge pump:

    [GRAPHIC] [TIFF OMITTED] TC01FE91.025
    
    (2) For branch suctions to cargo and machinery spaces:
    [GRAPHIC] [TIFF OMITTED] TC01FE91.026
    
where:

L=Length of vessel on loadwater line, in feet.
B=Breadth of vessel, in feet. (5)
D=Molded depth (in feet) to the bulkhead deck.(6)
c=Length of compartment, in feet.
d=Required internal diameter of suction pipe, in inches.

    Note 1--For tank vessels, ``L'' may be reduced by the combined 
length of the cargo oil tanks.
    Note 2--For bulk carriers with full depth wing tanks served by a 
ballast system where the beam of the vessel is not representative of the 
breadth of the compartment, ``B'' may be appropriately modified to the 
breadth of the compartment.
    Note 3--In the calculation for a vessel with more than one hull, 
such as a catamaran, the breadth of the unit is the breadth of one hull.
    Note 4--In the calculation for a mobile offshore drilling unit, 
``L'' is reducible by the combined length of spaces that can be pumped 
by another piping system meeting Secs. 56.50-50 and 56.50-55, where 
``L'' is the length of the unit at the waterline.
    Note 5--For mobile offshore drilling units employing unusual hull 
forms, ``B'' may be modified to the average breadth rather than the 
maximum breadth.
    Note 6--For each passenger vessel constructed on or after June 9, 
1995, and being on an international voyage, D must be measured to the 
next deck above the bulkhead deck if an enclosed cargo space on the 
bulkhead deck that is internally drained in accordance with paragraph 
(a)(4) of this section extends the entire length of the vessel. Where 
the enclosed cargo space extends a lesser length, D must be taken as the 
sum of the molded depth (in feet) to the bulkhead deck plus lh/L where l 
and h are the aggregate length and height (in feet) of the enclosed 
cargo space.

    (3) For vessels of 150 gross tons and over, no main suction piping 
shall be less than 2\1/2\ inches internal diameter. Branch piping need 
not be more than 4 inches and shall not be less than 2 inches in 
diameter except for drainage of small pockets or spaces in which case 
1\1/2\-inch diameter may be used. For vessels less than 150 gross tons 
no bilge suction shall be less than 1\1/2\ inches internal diameter and 
no branch piping shall be less than 1 inch nominal pipe size.
    (4) For vessels of 65 feet in length or less and not engaged on an 
international voyage, the bilge pipe sizes computed by Formulas (1) and 
(2) of this paragraph are not mandatory, but in no case shall the size 
be less than 1 inch nominal pipe size.
    (5) The number, location, and size of bilge suctions in the boiler 
and machinery compartments shall be determined when the piping plans are 
submitted for approval and shall be based upon the size of the 
compartments and the drainage arrangements.
    (e) Independent bilge suction. One of the independent bilge pumps 
must have a suction of a diameter not less than that given by Formula 
(2) in paragraph (d) of this section that is led directly from the 
engine room bilge entirely independent of the bilge main, and on 
passenger vessels each independent bilge pump located in the machinery 
spaces must have such direct suctions from these spaces, except that not 
more than two pumps are required to have direct suctions from any one 
space. A suction that is led directly from a suitably located pump 
manifold may be considered to be independent of

[[Page 191]]

the bilge main. Where two direct suctions are required in any one 
compartment on passenger vessels, one suction must be located on each 
side of the compartment. If watertight bulkheads separate the engine and 
boiler rooms, a direct suction or suctions must be fitted to each 
compartment unless the pumps available for bilge service are distributed 
throughout these compartments, in which case at least one pump in each 
such compartment must be fitted with direct suction in its compartment. 
In a vessel with more than one hull, there must be one bilge pump that 
has an independent bilge suction in each hull. In a column stabilized 
mobile offshore drilling unit, the independent bilge suction must be 
from the pumproom bilge.
    (f) Emergency bilge suctions. In addition to the independent bilge 
suction(s) required by paragraph (e) of this section, an emergency bilge 
suction must be provided in the machinery space for all self-propelled 
vessels as described in the following subparagraphs. Emergency suctions 
must be provided from pumps other than those required by Sec. 56.50-
55(a) of this part. Such suctions must have nonreturn valves, and must 
meet the following criteria as appropriate:
    (1) On passenger vessels propelled by steam and operating on an 
international voyage or on ocean, coastwise, or Great Lakes routes, the 
main circulating pump is to be fitted with a direct bilge suction for 
the machinery space. The diameter of such suctions shall not be less 
than two-thirds the diameter of the main sea injection. When it can be 
shown to the satisfaction of the Commandant that the main circulating 
pump is not suitable for emergency bilge service, a direct emergency 
bilge suction is to be led from the largest available independent power 
driven pump to the drainage level of the machinery space. The suction is 
to be of the same diameter as the main inlet of the pump used and the 
capacity of the pump shall exceed that of a required main bilge pump.
    (2) On passenger vessels propelled by internal combustion engines 
and operating on an international voyage or on ocean, coastwise, or 
Great Lakes routes, the largest available pump in the engine room is to 
be fitted with the direct bilge suction in the machinery space except 
that a required bilge pump may not be used. The area of the suction pipe 
is to be equal to the full suction inlet of the pump. The discharge 
capacity of the pump selected shall exceed the capacity of the required 
main bilge pump.
    (3) Vessels over 180 feet in length which are not passenger vessels 
and which operate on international voyages or in ocean, coastwise, or 
Great Lakes service, must be provided with a direct emergency bilge 
suction from any pump in the machinery space, except that a required 
bilge pump may not be used. The discharge capacity of the pump selected 
must exceed the capacity of the required main bilge pump and the area of 
the suction inlet is to be equal to the full suction inlet of the pump.
    (4) Vessels under 180 feet in length need not provide an emergency 
bilge suction, except that passenger vessels shall comply with the 
requirements of paragraphs (f) (1) and (2) of this section.
    (5) Each vessel with more than one hull must have an emergency bilge 
suction in each hull.
    (6) Each column stabilized mobile offshore drilling unit must have--
    (i) An emergency bilge suction in each hull; and
    (ii) A remote control for the emergency pump and associated valves 
that can be operated from the ballast control room.
    (g) Each individual bilge suction shall be fitted with a suitable 
bilge strainer having an open area of not less than three times at of 
the suction pipe. In addition a mud box or basket strainer shall be 
fitted in an accessible position between the bilge suction manifold and 
the pump.
    (h) Pipes for draining cargo holds or machinery spaces must be 
separate from pipes which are used for filling or emptying tanks where 
water or oil is carried. Bilge and ballast piping systems must be so 
arranged as to prevent oil or water from the sea or ballast spaces from 
passing into cargo holds or machinery spaces, or from passing from one 
compartment to another, whether from the sea, water ballast, or

[[Page 192]]

oil tanks, by the appropriate installation of stop and non-return 
valves. The bilge and ballast mains must be fitted with separate control 
valves at the pumps. Except as allowed by paragraph (c)(4)(vii) of this 
section, piping for draining a cargo hold or machinery space must be 
separate from piping used for filling or emptying any tank where water 
or oil is carried. Piping for bilge and ballast must be arranged so as 
to prevent, by the appropriate installation of stop and non-return 
valves, oil or water from the sea or ballast spaces from passing into a 
cargo hold or machinery space, or from passing from one compartment to 
another, regardless of the source. The bilge and ballast mains must be 
fitted with separate control valves at the pumps.
    (i) Ballast piping shall not be installed to any hull compartment of 
a wood vessel. Where the carriage of liquid ballast in such vessels is 
necessary, suitable ballast tanks, structurally independent of the hull, 
shall be provided.
    (j) When dry cargo is to be carried in deep tanks, arrangement shall 
be made for disconnecting or blanking-off the oil and ballast lines, and 
the bilge suctions shall be disconnected or blanked-off when oil or 
ballast is carried. Blind flanges or reversible pipe fittings may be 
employed for this purpose.
    (k) Where bilge and ballast piping is led through tanks, except 
ballast piping in ballast tanks, means must be provided to minimize the 
risk of flooding of other spaces due to pipe failure within the tanks. 
In this regard, such piping may be in an oiltight or watertight pipe 
tunnel, or the piping may be of Schedule 80 pipe wall thickness, fitted 
with expansion bends, and all joints within the tanks are welded. 
Alternative designs may be installed as approved by the Marine Safety 
Center. Where a pipe tunnel is installed, the watertight integrity of 
the bulkheads must be maintained. No valve or fitting may be located 
within the tunnel if the pipe tunnel is not of sufficient size to afford 
easy access. These requirements need not be met provided the contents of 
the tank and piping system are chemically compatible and strength and 
stability calculations are submitted showing that crossflooding 
resulting from a pipe, the tank, and the spaces through which the piping 
passes will not seriously affect the safety of the ship, including the 
launching of lifeboats due to the ship's listing. Bilge lines led 
through tanks without a pipe tunnel must be fitted with nonreturn valves 
at the bilge suctions.
    (l) When bilge pumps are utilized for other services, the piping 
shall be so arranged that under any condition at least one pump will be 
available for drainage of the vessel through an overboard discharge, 
while the other pump(s) are being used for a different service.
    (m) All bilge pipes used in or under fuel storage tanks or in the 
boiler or machinery space, including spaces in which oil settling tanks 
or oil pumping units are located, shall be of steel or other acceptable 
material.
    (n) Oil pollution prevention requirements for bilge and ballast 
systems are contained in subpart B of part 155, Title 33, Code of 
Federal Regulations.

     Note: For the purposes of this section, a pumproom is a machinery 
space on a column stabilized mobile offshore drilling unit.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 73-58R, 39 FR 18767, May 30, 1974; 79-165a, 
45 FR 64188, Sept. 29, 1980; CGD 77-140, 54 FR 40608, Oct. 2, 1989; 55 
FR 39968, Oct. 1, 1990; CGD 83-043, 60 FR 24772, May 10, 1995]]



Sec. 56.50-55  Bilge pumps.

    (a) Self-propelled vessels. (1) Each self-propelled vessel must be 
provided with a power-driven pump or pumps connected to the bilge main 
as required by Table 56.50-55(a).

[[Page 193]]



                    Table 56.50-55(a).--Power Bilge Pumps Required for Self-Propelled Vessels                   
----------------------------------------------------------------------------------------------------------------
                                        Passenger vessels \1\           Dry-cargo vessels      Tank      Mobile 
                                -------------------------------------          \2\           vessels    offshore
                                                                     ---------------------------------  drilling
                                                  Ocean,                Ocean,                           units  
     Vessel length, in feet      International    coast-   All other    coast-                        ----------
                                  voyages \3\    wise and    waters    wise and     All        All              
                                                  Great                 Great      waters     waters      All   
                                                  Lakes                 Lakes                            waters 
----------------------------------------------------------------------------------------------------------------
180' or more...................        \4\ 3        \4\ 3          2          2          2          2          2
Below 180' and exceeding 65'...        \4\ 3        \5\ 2      \5\ 2      \5\ 2      \5\ 2          2          2
65' or less....................            3            1          1          1          1          1  .........
----------------------------------------------------------------------------------------------------------------
\1\ Small passenger vessels under 100 gross tons refer to Subpart 182.25 of Subchapter T (Small Passenger       
  Vessel) of this chapter.                                                                                      
\2\ Dry-bulk carriers having ballast pumps connected to the tanks outside the engineroom and to the cargo hold  
  may substitute the appropriate requirements for tank vessels.                                                 
\3\ Not applicable to passenger vessels which do not proceed more than 20 mile from the nearest land, or which  
  are employed in the carriage of large numbers of unberthed passengers in special trades.                      
\4\ When the criterion numeral exceeds 30, an additional independent power-driven pump is required. (See Part   
  171 of this chapter for determination of criterion numeral.)                                                  
\5\ Vessels operating on lakes (including Great Lakes), bays, sounds, or rivers where steam is always available,
  or where a suitable water supply is available from a power-driven pump of adequate pressure and capacity, may 
  substitute siphons or eductors for one of the required power-driven pumps, provided a siphon or eductor is    
  permanently installed in each hold or compartment.                                                            

    (b) Nonself-propelled vessels. (1) Ocean going sailing vessels and 
barges shall be provided with pumps connected to the bilge main as 
required in Table 56.50-55(b)(1).

                    Table 56.50-55(b)(1)--Bilge Pumps Required for Nonself-Propelled Vessels                    
----------------------------------------------------------------------------------------------------------------
           Type of vessel                   Waters navigated             Power pumps (\1\)          Hand pumps  
----------------------------------------------------------------------------------------------------------------
Sailing.............................  Ocean and coastwise.........  Two........................  (\2\)          
Manned barges.......................  ......do....................  Two........................  (\2\)          
Manned barges.......................  Other than ocean and          (\3\)......................  (\3\)          
                                       coastwise.                                                               
Unmanned barges.....................  All waters..................  (\3\)......................  (\3\)          
Mobile offshore drilling units......  All waters..................  Two........................  None.          
----------------------------------------------------------------------------------------------------------------
\1\ Where power is always available, independent power bilge pumps shall be installed as required and shall be  
  connected to the bilge main.                                                                                  
\2\ Efficient hand pumps connected to the bilge main may be substituted for the power pumps. Where there is no  
  common bilge main, one hand pump will be required for each compartment.                                       
\3\ Suitable hand or power pumps or siphons, portable or fixed, carried either on board the barge or on the     
  towing vessel shall be provided.                                                                              

    (2) The pumps and source of power for operation on oceangoing 
sailing vessels and barges shall be located above the bulkhead deck or 
at the highest convenient level which is always accessible.
    (3) Each hull of a vessel with more than one hull, such as a 
catamaran, must meet Table 56.50-55(b).
    (c) Capacity of independent power bilge pump. Each power bilge pump 
must have the capacity to develop a suction velocity of not less than 
400 feet per minute through the size of bilge main piping required by 
Sec. 56.50-50(d)(1) of this part under ordinary conditions; except that, 
for vessels of less than 65 feet in length not engaged on international 
voyages, the pump must have a minimum capacity of 25 gallons per minute 
and need not meet the velocity requirement of this paragraph.
    (d) Priming. Suitable means shall be provided for priming 
centrifugal pumps which are not of the self-priming type.
    (e) Location. (1) For self-propelled vessels, if the engines and 
boilers are in two or more watertight compartments, the bilge pumps must 
be distributed throughout these compartments. On other self-propelled 
vessels and mobile offshore drilling units, the bilge pumps must be in 
separate compartments to the extent practicable. When the location of 
bilge pumps in separate watertight compartments is not practicable, 
alternative arrangements may be submitted for consideration by the 
Marine Safety Center.
    (2) For nonself-propelled vessels requiring two bilge pumps, these 
pumps,

[[Page 194]]

insofar as practicable, shall be located in separate watertight 
machinery spaces. When the location of bilge pumps in separate 
watertight compartments is not possible, the Commandant will consider 
alternate arrangements of the bilge pumps.
    (3) The emergency bilge pumps shall not be installed in a passenger 
ship forward of the collision bulkhead.
    (4) Each hull of a vessel with more than one hull must have at least 
two means for pumping the bilges in each hull. No multi-hulled vessel 
may operate unless one of these means is available to pump each bilge.
    (f) Other pumps. Sanitary, ballast, and general service pumps having 
the required capacity may be accepted as independent power bilge pumps 
if fitted with the necessary connections to the bilge pumping system.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 79-023, 48 FR 
51007, Nov. 4, 1983; CGD 77-140, 54 FR 40608, Oct. 2, 1989; 55 FR 39968, 
Oct. 1, 1990; CGD 83-043, 60 FR 24773, May 10, 1995]



Sec. 56.50-57  Bilge piping and pumps, alternative requirements.

    (a) If a passenger vessel complies with Secs. 171.075 and 171.082 of 
this chapter, its bilge pumping and piping systems must meet 
Secs. 56.50-50 and 56.50-55, except as follows:
    (1) Each bilge pumping system must comply with--
    (i) Regulation 19(b) of the Annex to IMCO Resolution A.265 (VIII) in 
place of Secs. 56.50-55(a)(1), 56.50-55(a)(3), and 56.50-55(f);
    (ii) Regulation 19(d) of the Annex to IMCO Resolution A.265 (VIII) 
in place of Sec. 56.50-55(a)(2).
    (2) Each bilge main must comply with Regulation 19(i) of the Annex 
to IMCO Resolution A.265 (VIII) in place of Sec. 56.50-50(d) except--
    (i) The nearest commercial pipe size may be used if it is not more 
than one-fourth inch under the required diameter; and
    (ii) Each branch pipe must comply with Sec. 56.50-50(d)(2).
    (b) The standards referred to in this section, which are contained 
in the Inter-governmental Maritime Consultative Organization (IMCO) 
Resolution A.265 (VIII), dated December 10, 1973, are incorporated by 
reference. This document is available from the National Technical 
Information Service, Springfield, Virginia, 22151, under the title 
``Regulations on Subdivision and Stability of Passenger Ships as 
Equivalent to part B of chapter II of the International Convention for 
the Safety of Life at Sea, 1960'' (Volume IV of the U.S. Coast Guard's 
``Commandant's International Technical Series'', USCG CITS-74-1-1.)

[CGD 76-053, 47 FR 37553, Aug. 26, 1982, as amended by CGD 79-023, 48 FR 
51007, Nov. 4, 1983]



Sec. 56.50-60  Systems containing oil.

    (a)(1) Oil-piping systems for the transfer or discharge of cargo or 
fuel oil must be separate from other piping systems as far as 
practicable, and positive means shall be provided to prevent 
interconnection in service.
    (2) Fuel oil and cargo oil systems may be combined if the cargo oil 
systems contain only Grade E oils and have no connection to cargo 
systems containing grades of oil with lower flash points or hazardous 
substances.
    (3) Pumps used to transfer oil must have no discharge connections to 
fire mains, boiler feed systems, or condensers unless approved positive 
means are provided to prevent oil from being accidentally discharged 
into any of the aforementioned systems.
    (b) When oil needs to be heated to lower its viscosity, heating 
coils must be properly installed in each tank.
    (1) Each drain from a heating coil as well as each drain from an oil 
heater must run to an open inspection tank or other suitable oil 
detector before returning to the feed system.
    (2) As far as practicable, no part of the fuel-oil system containing 
heated oil under pressure exceeding 180 KPa (26 psi) may be placed in a 
concealed position so that defects and leakage cannot be readily 
observed. Each machinery space containing a part of the system must be 
adequately illuminated.
    (c) Filling pipes may be led directly from the deck into the tanks 
or to a manifold in an accessible location permanently marked to 
indicate the tanks to which they are connected. A shutoff valve must be 
fitted at each filling end.

[[Page 195]]

Oil piping must not be led through accommodation spaces, except that low 
pressure fill piping not normally used at sea may pass through 
accommodation spaces if it is of steel construction, all welded, and not 
concealed.
    (d) Piping subject to internal head pressure from oil in the tank 
must be fitted with positive shutoff valves located at the tank.
    (1) Valves installed on the outside of the oil tanks must be made of 
steel, ductile cast iron ASTM A395, or a ductile nonferrous alloy having 
a melting point above 1,700  deg.F and must be arranged with a means of 
manual control locally at the valve and remotely from a readily 
accessible and safe location outside of the compartment in which the 
valves are located.
    (i) In the special case of a deep tank in any shaft tunnel, piping 
tunnel, or similar space, one or more valves must be fitted on the tank, 
but control in the event of fire may be effected by means of an 
additional valve on the piping outside the tunnel or similar space. Any 
such additional valve installed inside a machinery space must be capable 
of being operated from outside this space.
    (ii) [Reserved]
    (2) If valves are installed on the inside of the tank, they may be 
made of cast iron and arranged for remote control only. Additional 
valves for local control must be located in the space where the system 
exits from the tank or adjacent tanks. Valves for local control outside 
the tanks must be made of steel, ductile cast iron ASTM A395, or a 
ductile nonferrous alloy having a melting point above 1,700  deg.F.
    (3) Power operated valves installed to comply with the requirements 
of this section must meet the following requirements:
    (i) Valve actuators must be capable of closing the valves under all 
conditions, except during physical interruption of the power system 
(e.g., cable breakage or tube rupture). Fluid power actuated valves, 
other than those opened against spring pressure, must be provided with 
an energy storage system which is protected, as far as practicable, from 
fire and collision. The storage system must be used for no other purpose 
and must have sufficient capacity to cycle all connected valves from the 
initial valve position to the opposite position and return. The cross 
connection of this system to an alternate power supply will be given 
special consideration by the Marine Safety Center.
    (ii) The valve shall have a local power actuator to both open and 
close the valve unless local manual opening operation will not prevent 
remote closing of the valve.
    (iii) The positioning of the valve by either the local or remote 
actuators shall not void the ability of the other actuator to close the 
valve.
    (iv) The valve shall be provided with a means of emergency manual 
operation to both open and close the valve regardless of the status of 
the power operating system. Such manual operation may interfere with the 
power operation, and if so, shall be protected from causal use by means 
of covers, locking devices, or other suitable means. Instructions and 
warnings regarding the emergency system shall be conspicuously posted at 
the valve.
    (4) Remote operation for shutoff valves on small independent oil 
tanks will be specially considered in each case where the size of tanks 
and their location may warrant the omission of remote operating rods.
    (e) Fuel oil tanks overhanging boilers are prohibited.
    (f) Valves for drawing fuel or draining water from fuel are not 
permitted in fuel oil systems except that a single valve may be 
permitted in the case of diesel driven machinery if suitably located 
within the machinery space away from any potential source of ignition. 
Such a valve shall be fitted with a cap or a plug to prevent leakage.
    (g) Test cocks must not be fitted to fuel oil or cargo oil tanks.
    (h) Oil piping must not run through feed or potable water tanks. 
Feed or potable water piping must not pass through oil tanks.
    (i) Where flooding equalizing cross-connections between fuel or 
cargo tanks are required for stability considerations, the arrangement 
must be approved by the Marine Safety Center.
    (j) Piping conveying oil must be run well away from hot surfaces 
wherever

[[Page 196]]

possible. Where such leads are unavoidable, only welded joints are to be 
used, or alternatively, suitable shields are to be fitted in the way of 
flanged or mechanical pipe joints when welded joints are not 
practicable. Piping that conveys fuel oil or lubricating oil to 
equipment and is in the proximity of equipment or lines having an open 
flame or having parts operating above 500  deg.F must be of seamless 
steel. (See Sec. 56.50-65 of this part.)
    (k) Oil piping drains, strainers and other equipment subject to 
normal oil leakage must be fitted with drip pans or other means to 
prevent oil draining into the bilge.
    (l) Where oil piping passes through a non-oil tank without stop 
valves complying with paragraph (d) of this section installed at all 
tank penetrations, the piping must comply with Sec. 56.50-50(k).
    (m) Each arrangement for the storage, distribution, and use of oil 
in a pressure-lubrication system must--
    (1) As well as comply with Sec. 56.50-80, be such as to ensure the 
safety of the vessel and all persons aboard; and
    (2) In a machinery space, meet the applicable requirements of 
Secs. 56.50-60 (b)(2) and (d), 56.50-85(a)(11), 56.50-90 (c) and (d), 
and 58.01-55(f) of this subchapter. No arrangement need comply with 
Sec. 58.50-90 (c)(1) and (c)(3) of this subchapter if the sounding pipe 
is fitted with an effective means of closure, such as a threaded cap or 
plug or other means acceptable to the Officer in Charge, Marine 
Inspection. The use of flexible piping or hose is permitted in 
accordance with the applicable requirements of Secs. 56.35-10, 56.35-15, 
and 56.60-25(c).
    (n) Each arrangement for the storage, distribution, and use of any 
other flammable oil employed under pressure in a power transmission-
system, control and activating system, or heating system must be such as 
to ensure the safety of the vessel and all persons aboard by--
    (1) Complying with Subpart 58.30 of this subchapter; and,
    (2) Where means of ignition are present, meeting the applicable 
requirements of Secs. 56.50-85(a)(11), 56.50-90 (c) and (d), and 58.01-
55(f) of this subchapter. Each pipe and its valves and fittings must be 
of steel or other approved material, except that the use of flexible 
piping or hose is permitted in accordance with the applicable 
requirements of Secs. 56.35-10, 56.35-15, and 56.60-25(c).

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CGD 77-
140, 54 FR 40609, Oct. 2, 1989; 55 FR 39968, Oct. 1, 1990; CGD 83-043, 
60 FR 24774, May 10, 1995]



Sec. 56.50-65  Burner fuel-oil service systems.

    (a) All discharge piping from the fuel oil service pumps to burners 
must be seamless steel with a thickness of at least Schedule 80. If 
required by Sec. 56.07-10(e) of this part or paragraph 104.1.2 of ANSI 
B31.1, the thickness must be greater than Schedule 80. Short lengths of 
steel, or annealed copper nickel, nickel copper, or copper pipe and 
tubing may be used between the fuel oil burner front header manifold and 
the atomizer head to provide flexibility. All material used must meet 
the requirements of subpart 56.60 of this part. The use of non-metallic 
materials is prohibited. The thickness of the short lengths must not be 
less than the larger of 0.9 mm (0.35 inch) or that required by 
Sec. 56.07-10(e) of this part. Flexible metallic tubing for this 
application may be used when approved by the Marine Safety Center. 
Tubing fittings must be of the flared type except that flareless 
fittings of the nonbite type may be used when the tubing is steel, 
nickel copper or copper nickel.
    (b)(1) All vessels having oil fired boilers must have at least two 
fuel service pumps, each of sufficient capacity to supply all the 
boilers at full power, and arranged so that one may be overhauled while 
the other is in service. At least two fuel oil heaters of approximately 
equal capacity must be installed and so arranged that any heater may be 
overhauled while the other(s) is (are) in service. Suction and discharge 
strainers must be of the duplex or other type capable of being cleaned 
without interrupting the oil supply.
    (2) All auxiliary boilers, except those furnishing steam for vital 
equipment and fire extinguishing purposes other than duplicate 
installations, may be

[[Page 197]]

equipped with a single fuel oil service pump and a single fuel oil 
heater. Such pumps need not be fitted with discharge strainers.
    (3) Strainers must be located so as to preclude the possibility of 
spraying oil on the burner or boiler casing, or be provided with spray 
shields. Coamings, drip pans, etc., must be fitted under fuel oil 
service pumps, heaters, etc., where necessary to prevent oil drainage to 
the bilge.
    (4) Boilers burning fuel oils of low viscosity need not be equipped 
with fuel oil heaters, provided acceptable evidence is furnished to 
indicate that satisfactory combustion will be obtained without the use 
of heaters.
    (c) Piping between service pumps and burners shall be located so as 
to be readily observable, and all bolted flange joints shall be provided 
with a wrap around deflector to deflect spray in case of a leak. The 
relief valve located at the pump and the relief valves fitted to the 
fuel oil heaters shall discharge back into the settling tank or the 
suction side of the pump. The return line from the burners shall be so 
arranged that the suction piping cannot be subjected to discharge 
pressure.
    (d) If threaded-bonnet valves are employed, they shall be of the 
union-bonnet type capable of being packed under pressure.
    (e) Unions shall not be used for pipe diameters of 1 inch and above.
    (f) Boiler header valves of the quick closing type shall be 
installed in the fuel supply lines as close to the boiler front header 
as practicable. The location is to be accessible to the operator or 
remotely controlled.
    (g) Bushings and street ells are not permitted in fuel oil discharge 
piping.
    (h) Each fuel-oil service pump must be equipped with controls as 
required by Sec. 58.01-25 of this subchapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 77-140, 54 FR 40609, Oct. 2, 1989; CGD 83-
043, 60 FR 24774, May 10, 1995]



Sec. 56.50-70   Gasoline fuel systems.

    (a) Material. (1) Fuel supply piping to the engines shall be of 
seamless drawn annealed copper pipe or tubing, nickel copper, or copper 
nickel pipe or tubing meeting the requirements of subpart 56.60.
    (2) Tubing wall thicknesses shall not be less than the larger of 
that shown in Table 56.50-70(a), or as required by Sec. 56.07-10(e) and 
104.1.2 of ANSI-B31.1.
    (3) Tubing fittings shall be of nonferrous drawn or forged metal and 
of the flared type except that the flareless fittings of the nonbite 
type may be used when the tubing system is of nickel copper or copper 
nickel. Tubing shall be cut square and flared by suitable tools. Tube 
ends shall be annealed before flaring. Pipe fittings shall be of 
nonferrous material. Pipe thread joints shall be made tight with a 
suitable compound.
    (4) Valves for fuel lines shall be of nonferrous material of the 
union bonnet type with ground seats except that cocks may be used if 
they are the solid bottom type with tapered plugs and union bonnets.

                Table 56.50-70(a)--Tubing Wall Thickness                
------------------------------------------------------------------------
                                                          Thickness     
       Outside diameter of tubing in inches        ---------------------
                                                      B.W.G.      Inch  
------------------------------------------------------------------------
\1/8\, \3/16\, \1/4\..............................        21      0.032
\5/16\, \3/8\.....................................        20       .035
\7/16\, \1/2\.....................................        19       .042
------------------------------------------------------------------------

    (b) Installation. (1) All fuel pipes, pipe connections, and 
accessories shall be readily accessible. The piping shall run in sight 
wherever practicable, protected against mechanical injury, and 
effectively secured against excessive movement and vibration by the use 
of soft nonferrous metal liners or straps without sharp edges. Where 
passing through steel decks or bulkheads, fuel lines shall be protected 
by close fitting ferrules or stuffing boxes. Refer to Sec. 56.30-25 for 
tubing joint installations.
    (2) A short length of suitable metallic or nonmetallic flexible 
tubing or hose, or a loop of annealed copper tubing shall be installed 
in the fuel supply line at or near the engine to prevent damage by 
vibration. If nonmetallic flexible hose is used it shall meet the 
requirements of Sec. 56.60-25(c) for fuel service. Flexible hose 
connections should maintain metallic contact between the sections of the 
fuel supply lines; however, if such contact is not maintained, the fuel 
tank shall be grounded.

[[Page 198]]

    (3) Valves in fuel lines shall be installed to close against the 
flow.
    (c) Shutoff valves. Shutoff valves of a suitable type shall be 
installed in the fuel supply lines, one as close to each tank as 
practicable, and one as close to each carburetor as practicable. Where 
fuel tanks are installed below the weather deck, arrangements shall be 
provided for operating all shutoff valves at the tanks from outside the 
compartments in which they are located, preferably from an accessible 
position on the weather deck. The operating gear for the shutoff valves 
at the tanks shall be accessible at all times and shall be suitably 
marked.
    (d) Strainers. A suitable twin strainer shall be fitted in the fuel 
supply line in the engine compartment. Strainers shall be of the type 
opening on top for cleaning screens. A drip pan shall be fitted under 
the strainer.
    (e) Outlets and drains. Outlets in fuel lines for drawing gasoline 
for any purpose are prohibited. Valved openings in the bottom of fuel 
tanks are prohibited; however, openings fitted with threaded plug or cap 
can be used for cleaning purposes.
    (f) Fuel suction connections. All fuel suction and return lines 
shall enter the top of the fuel tanks and connections shall be fitted 
into spuds. Such lines shall extend nearly to the bottom of the tank.
    (g) Filling and sounding pipes. Filling and sounding pipes shall be 
so arranged that vapors or possible overflow when filling cannot escape 
to the inside of the vessel but will discharge overboard. Such pipes 
shall terminate on the weather deck clear of any coamings and shall be 
fitted with suitable shutoff valves or deck plugs. Filling and sounding 
pipes shall extend to within one-half of their diameter from the bottom 
of the tank or from the surface of the striking plate in case of a 
sounding pipe. A flame screen of noncorrodible wire mesh shall be fitted 
in the throat of the filling pipe. Sounding pipes shall be kept closed 
at all times except during sounding.
    (h) Vent pipes. Each tank shall be fitted with a vent, the cross-
sectional area of which shall not be less than that of the filling pipe. 
The vent pipes shall terminate at least 2 feet above the weather deck 
and not less than 3 feet from any opening into living quarters or other 
below deck space. The ends of vent pipes shall terminate with U-bends 
and shall be fitted with flame screens or flame arresters. The flame 
screens shall consist of a single screen of corrosion resistant wire of 
at least 30 by 30 mesh.
    (i) Gasoline tanks. For requirements pertaining to independent 
gasoline fuel tanks see subpart 58.50 of this subchapter.
    (j) Fuel pumps. Each fuel pump must be equipped with controls as 
required by Sec. 58.01-25 of this subchapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 83-
043, 60 FR 24774, May 10, 1995]



Sec. 56.50-75  Diesel fuel systems.

    (a) Vessels greater than 100 gross tons. (1) The diesel fuel system 
shall comply with Secs. 56.50-60, 56.50-85, and 56.50-90. The fuel 
supply piping to engines shall be of seamless steel, annealed seamless 
copper or brass pipe or tubing, or of nickel copper or copper nickel 
alloy meeting the requirements of subpart 56.60 for materials and 
Sec. 56.50-70(a)(2) for thickness. Fuel oil service or unit pumps shall 
be equipped with controls to comply with Sec. 58.01-25 of this 
subchapter.
    (2) The installation shall comply with Sec. 56.50-70(b).
    (3) Tubing connections and fittings shall be drawn or forged metal 
of the flared type except that flareless fittings of the nonbite type 
may be used when the tubing system is steel, nickel-copper, or copper-
nickel. When making flared tube connections the tubing shall be cut 
square and flared by suitable tools. Tube ends shall be annealed before 
flaring.
    (b) Vessels of 100 gross tons and less and tank barges. (1) 
Materials. Fuel supply piping shall be of copper, nickel copper or 
copper nickel having a minimum wall thickness of 0.035 inch except that 
piping of other materials such as seamless steel pipe or tubing which 
provides equivalent safety may be used.
    (2) Tubing connections and fittings. Tubing connections shall comply 
with the provisions of Sec. 56.50-75(a)(3).

[[Page 199]]

    (3) Installation. The installation of diesel fuel piping shall 
comply with the requirements of Sec. 56.50-70(b).
    (4) Shutoff valves. Shutoff valves shall be installed in the fuel 
supply lines, one as close to each tank as practicable, and one as close 
to each fuel pump as practicable. Valves shall be accessible at all 
times.
    (5) Outlets and drains. Valves for removing water or impurities from 
fuel oil systems will be permitted in the machinery space provided such 
valves are fitted with caps or plugs to prevent leakage.
    (6) Filling pipe. Tank filling pipes on motorboats and motor vessels 
of less than 100 gross tons and tank barges shall terminate on an open 
deck and shall be fitted with suitable shutoff valves, deck plugs, or 
caps.
    (7) Vent pipes. Each tank shall be fitted with a vent pipe complying 
with Sec. 56.50-85.
    (8) Independent diesel fuel tanks. See subpart 58.50 of this 
subchapter for specific requirements.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40610, Oct. 2, 1989]



Sec. 56.50-80   Lubricating-oil systems.

    (a) The lubricating oil system shall be designed to function 
satisfactorily when the vessel has a permanent 15 deg. list and a 
permanent 5 deg. trim.
    (b) When pressure or gravity-forced lubrication is employed for the 
steam driven main propelling machinery, an independent auxiliary 
lubricating pump shall be provided.
    (c) Oil coolers on steam driven machinery shall be provided with two 
separate means of circulating water through the coolers.
    (d) For internal combustion engine installations, the requirements 
of paragraphs (b) and (c) of this section shall be met, but they do not 
apply to vessels in river and harbor service, nor to any vessel below 
300 gross tons. Where the size and design of an engine is such that 
lubrication before starting is not necessary and an attached pump is 
normally used, the independent auxiliary pump is not required if a 
duplicate of the attached pump is carried as spare. In meeting the 
requirements of paragraph (c) of this section in the case of internal 
combustion engines, two separate means are to be provided for 
circulating coolant on those engines on which oil coolers are fitted. 
One of those means must be independently driven and may consist of a 
connection from a pump of adequate size normally used for other purposes 
utilizing the required coolant. Where the design of an engine will not 
readily accommodate an independent pump connection, the independent 
auxiliary pump will not be required if a duplicate of the attached pump 
is carried as a spare. Oil filters shall be provided on all internal 
combustion engine installations. On main propulsion engines which are 
fitted with full-flow type filters, the arrangement shall be such that 
the filters may be cleaned without interrupting the oil supply except 
that such an arrangement is not required on vessels having more than a 
single main propulsion engine.
    (e) The lubricating oil piping shall be independent of other piping 
systems and shall be provided with necessary coolers, heaters, filters, 
etc., for proper operation. Oil heaters shall be fitted with bypasses.
    (f) Diesel engine lubrication systems shall be so arranged that 
vapors from the sump tank may not be discharged back into the engine 
crank case of engines of the dry sump type.
    (g) Steam turbine driven propulsion and auxiliary generating 
machinery depending on forced lubrication shall be arranged to shut down 
automatically upon failure of the lubricating system.
    (h) Sight-flow glasses may be used in lubricating-oil systems 
provided it has been demonstrated, to the satisfaction of the Commanding 
Officer, Marine Safety Center, that they can withstand exposure to a 
flame at a temperature of 927 deg.C (1700 deg.F) for one hour, without 
failure or appreciable leakage.
    (i) Steam driven propulsion machinery must be provided with an 
emergency supply of lubricating oil that must operate automatically upon 
failure of the lubricating oil system. The emergency oil supply must be 
adequate

[[Page 200]]

to provide lubrication until the equipment comes to rest during 
automatic shutdown.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 81-030, 53 FR 17837, May 18, 1988; CGD 83-
043, 60 FR 24774, May 10, 1995]



Sec. 56.50-85  Tank-vent piping.

    (a) This section applies to vents for all independent, fixed, non-
pressure tanks or containers or for spaces in which liquids, such as 
fuel, ship's stores, cargo, or ballast, are carried.
    (1) The structural arrangement in double bottom and other tanks 
shall be such as to permit the free passage of air and gases from all 
parts of the tanks to vent pipes.
    (2) Tanks having a comparatively small surface, such as fuel oil 
settling tanks, need be fitted with only one vent pipe, but tanks having 
a comparatively large surface shall be fitted with at least two vent 
pipes. The vents shall be located so as to provide venting of the tanks 
under any service condition.
    (3) Vent pipes for fuel oil tanks shall, wherever possible, have a 
slope of no less than 30 deg.. Header lines, where both ends are 
adequately drained to a tank, are excluded from this requirement.
    (4) Tank vents must extend above the weather deck, except vents from 
fresh water tanks, bilge oily-water holding tanks, bilge slop tanks, and 
tanks containing Grade E combustible liquids, such as lubricating oil, 
may terminate in the machinery space, provided--
    (i) The vents are arranged to prevent overflow on machinery, 
electrical equipment, and hot surfaces;
    (ii) Tanks containing combustible liquids are not heated; and
    (iii) The vents terminate above the deep load waterline if the tanks 
have boundaries in common with the hull.
    (5) Vents from oil tanks must terminate not less than three feet 
from any opening into living quarters.
    (6) Vents extending above the freeboard deck or superstructure deck 
from fuel oil and other tanks must be at least Schedule 40 in wall 
thickness. Except for barges in inland service and for Great Lakes 
vessels, the height from the deck to any point where water may gain 
access through the vent to below deck must be at least 30 inches (760mm) 
on the freeboard deck and 17\1/2\ inches (450mm) on the superstructure 
deck. On Great Lakes vessels, the height from the deck to any point 
where water may gain access through the vent to below deck must be at 
least 30 inches (760mm) on the freeboard deck, 24 inches (610mm) on the 
raised quarterdeck, and 12 inches (305mm) on other superstructure decks. 
Where the height of vents on Great Lakes vessels may interfere with the 
working of the vessel, a lower height may be approved by the Marine 
Safety Center provided the vent cap is properly protected from 
mechanical damage. For barges in inland service, the vents must extend 
at least six inches above the deck. A lesser amount may be approved by 
the Marine Safety Center if evidence is provided that a particular vent 
has proven satisfactory in service.
    (7) Satisfactory means, permanently attached, shall be provided for 
closing the openings of all vents, except that barges in inland service 
may be exempted. Acceptable means of closure are:
    (i) A ball check valve where the ball float, normally in the open 
position, will float up and close under the action of a submerging wave. 
The valve shall be designed so that the effective clear discharge area 
through the valve with the float in the open position is not less than 
the inlet area of the vent pipe to which the valve is connected.
    (ii) A hinged closure normally open on the outlet of the return 
bend, which must close automatically by the force of a submerging wave; 
or
    (iii) Another suitable device acceptable to the Commanding Officer, 
Marine Safety Center.
    (8) Vent outlets from all tanks which may emit flammable or 
combustible vapors, such as bilge slop tanks and contaminated drain 
tanks, must be fitted with a single screen of corrosion-resistant wire 
of at least 30 by 30 mesh, or two screens of at least 20 by 20 mesh 
spaced not less than one-half inch (13mm) nor more than 1\1/2\ inches 
(38mm) apart. The clear area through the mesh must not be less than the 
internal unobstructed area of the required pipe.

[[Page 201]]

    (9) Where vents are provided with flame screens, the closure device 
shall be situated so as not to damage these screens.
    (10) The diameter of each vent pipe must not be less than 1\1/2\ 
inches nominal pipe size for fresh water tanks, 2 inches nominal pipe 
size for water ballast tanks, and 2\1/2\ inches nominal pipe size for 
fuel oil tanks, except that small independent tanks need not have a vent 
more than 25% greater in cross-sectional area than the fill line.
    (11)(i) If a tank may be filled by a pressure head exceeding that 
for which the tank is designed, the aggregate cross-sectional area of 
the vents in each tank must be not less than the cross-sectional area of 
the filling line unless the tank is protected by overflows, in which 
case the aggregate cross-sectional area of the overflows must be not 
less than the cross-sectional area of the filling line.
    (ii) Provision must be made to guard against liquids rising in the 
venting system to a height that would exceed the design head of a cargo 
tank or fuel-oil tank. It may be made by high-level alarms or overflow-
control systems or other, equivalent means, together with gauging 
devices and procedures for filling cargo tanks.
    (12) Where deep tanks are intended for the occasional carriage of 
dry or liquid cargo, a ``spectacle'' or ring and blank flange may be 
fitted in the overflow pipe so arranged as not to interfere with venting 
when the tanks contain oil.
    (13) Vents from fresh water or water ballast tanks shall not be 
connected to a common header with vents from oil or oily ballast tanks.
    (b) Tank vents must remain within the watertight subdivision 
boundaries in which the tanks they vent are located. Where the 
structural configuration of a vessel makes meeting this requirement 
impracticable, the Marine Safety Center may permit a tank vent to 
penetrate a watertight subdivision bulkhead. All tank vents which 
penetrate watertight subdivision bulkheads must terminate above the 
weather deck.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40610, Oct. 2, 1989; CGD 83-043, 60 FR 24774, May 10, 1995; CGD 95-012, 
60 FR 48050, Sept. 18, 1995]



Sec. 56.50-90   Sounding devices.

    (a) Each tank must be provided with a suitable means of determining 
liquid level. Except for a main cargo tank on a tank vessel, each 
integral hull tank and compartment, unless at all times accessible while 
the vessel is operating, must be fitted with a sounding pipe.
    (b) Where sounding pipes terminate below the freeboard deck on cargo 
vessels, they shall be fitted with gate valves. On passenger vessels, 
where sounding pipes terminate below the bulkhead deck, they shall be 
fitted with self-closing gate valves.
    (c) Except as allowed by this paragraph, on each vessel constructed 
on or after June 9, 1995, no sounding pipe used in a fuel-oil tank may 
terminate in any space where the risk of ignition of spillage from the 
pipe might arise. None may terminate in a space for passengers or crew. 
When practicable, none may terminate in a machinery space. When the 
Commanding Officer, Marine Safety Center, determines it impracticable to 
avoid terminating a pipe in a machinery space, a sounding pipe may 
terminate in a machinery space if all the following requirements are 
met:
    (1) In addition to the sounding pipe, the fuel-oil tank has an oil-
level gauge complying with paragraph (d) of this section.
    (2) The pipe terminates in a place remote from ignition hazards 
unless precautions are taken such as fitting an effective screen 
(shield) to prevent the fuel oil, in case of spillage through the end of 
the pipe, from coming into contact with a source of ignition.
    (3) The end of the pipe is fitted with a self-closing blanking 
device and a small-diameter, self-closing control cock located below the 
blanking device for the purpose of ascertaining before the blanking 
device is opened that no fuel oil is present. Provision must be made to 
ensure that no spillage of fuel

[[Page 202]]

oil through the control cock involves an ignition hazard.
    (d) On each vessel constructed on or after June 9, 1995, other oil-
level gauges may be used instead of sounding pipes if all the following 
requirements are met:
    (1) In a passenger vessel, no such gauge may require penetration 
below the top of the tank, and neither the failure of a gauge nor an 
overfilling of the tank may permit release of fuel into the space.
    (2) In a cargo vessel, neither the failure of such a gauge nor an 
overfilling of the tank may permit release of fuel into the space. The 
use of cylindrical gauge-glasses is prohibited. The use of oil-level 
gauges with flat glasses and self-closing valves between the gauges and 
fuel tanks is acceptable.
    (e) The upper ends of sounding pipes terminating at the weather deck 
shall be closed by a screw cap or plug. Great Lakes dry cargo carriers 
may have the sounding pipes which service ballast water tanks terminate 
at least 4 inches above the deck if closure is provided by a tight 
fitting hinged cover making metal-to-metal contact with the hinge on the 
forward side. Positive means to secure these caps in the closed position 
shall be provided. No perforations or openings will be permitted 
throughout the length of a sounding pipe where fitted to oil tanks. 
Provision shall be made to prevent damage to the vessels' plating by the 
striking of the sounding rod.
    (f) On mobile offshore drilling units where installation of sounding 
pipes may not be practicable for some tanks, alternate means of 
determining liquid level may be used if approved by the Commandant.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56800, Dec. 4, 1978; CGD 83-043, 60 FR 24774, May 10, 1995]



Sec. 56.50-95  Overboard discharges and shell connections.

    (a)(1) All inlets and discharges led through the vessel's side shall 
be fitted with efficient and accessible means, located as close to the 
hull penetrations as is practicable, for preventing the accidental 
admission of water into the vessel either through such pipes or in the 
event of fracture of such pipes.
    (2) The number of scuppers, sanitary discharges, tank overflows, and 
other similar openings in the vessel's side shall be reduced to a 
minimum, either by making each discharge serve for as many as possible 
of the sanitary and other pipes, or in any other satisfactory manner.
    (3) In general, when the bulkhead deck is above the freeboard deck, 
the requirements of this section apply relative to the bulkhead deck. 
For vessels not assigned load lines, such as certain inland vessels and 
barges, the weather deck shall be taken as the freeboard deck.
    (b)(1) Scuppers and discharge pipes originating at any level and 
pentrating the shell either more than 17\1/2\ inches (450mm) below the 
freeboard deck or less than 23\1/2\ inches (600mm) above the summer load 
waterline must be provided with an automatic nonreturn valve at the 
shell. This valve, unless required by paragraph (b)(2) of this section, 
may be omitted if the piping is not less than Schedule 80 in wall 
thickness for nominal pipe sizes through 8 inches, Schedule 60 for 
nominal pipe sizes above 8 inches and below 16 inches, and Schedule 40 
for nominal pipe sizes 16 inches and above.
    (2) Discharges led through the shell originating either from spaces 
below the freeboard deck or from within enclosed superstructures and 
equivalent deckhouses on the freeboard deck as defined in Sec. 42.13-
15(i) of subchapter E (Load Lines) of this chapter, shall be fitted with 
efficient and accessible means for preventing water from passing 
inboard. Normally each separate discharge shall have one automatic 
nonreturn valve with a positive means of closing it from a position 
above the freeboard deck. Where, however, the vertical upward distance 
from the summer load line to the inboard end of the discharge pipe 
through which flooding can take place exceed 0.01L, the discharge may 
have two automatic nonreturn valves without positive means of closing, 
provided that the inboard valve is always accessible for examination 
under service conditions. Where that vertical distance exceeds 0.02L a 
single automatic nonreturn valve without positive means of closing is 
acceptable. In an installation where the two

[[Page 203]]

automatic nonreturn valves are used, the inboard valve must be above the 
tropical load line. The means for operating the positive action valve 
shall be readily accessible and provided with an indicator showing 
whether the valve is open or closed. A suitable arrangement shall be 
made to insure the valve is not closed by unauthorized persons, and a 
notice shall be posted in a conspicuous place at the operating station 
to the effect that the valve shall not be closed except as required in 
an emergency.
    (3) Where scuppers and drains are installed in superstructures or 
deckhouses not enclosed as defined in Sec. 42.13-15(j) of subchapter E 
(Load Lines) of this chapter, they shall be led overboard. Refer to 
paragraph (b)(1) of this section for any nonreturn valve requirement.
    (4) Sanitary pump discharges leading directly overboard or via a 
holding tank must meet the standards prescribed by this paragraph. The 
location of the sanitary system openings within the vessel determines 
whether the requirements of paragraph (b)(2) or (3) of this section are 
applicable.
    (c) Overflow pipes which discharge through the vessel's side must be 
located as far above the deepest load line as practicable and fitted 
with valves as required by paragraph (b) of this section. Two automatic 
nonreturn valves must be used unless it is impracticable to locate the 
inboard valve in an accessible position, in which case a nonreturn valve 
with a positive means of closure from a position above the freeboard 
deck will be acceptable. Overflows which extend at least 30 inches above 
the freeboard deck before discharging overboard may be fitted with a 
single automatic nonreturn valve at the vessel's side. Overflow pipes 
which serve as tank vents must not be fitted with positive means of 
closure without the specific approval of the Marine Safety Center. 
Overflow pipes may be vented to the weather.
    (d)(1) Sea inlets and discharges, such as used in closed systems 
required for the operation of main and auxiliary machinery, as in pump 
connections or scoop injection heat exchanger connections, need not meet 
the requirements of paragraphs (b) (1) and (2) of this section but 
instead shall be fitted with a shutoff valve located as near the shell 
plating as practicable, and may be locally controlled if the valve is 
located in a manned machinery space. These controls shall be readily 
accessible above the floor plates and shall be provided with indication 
showing whether the valve is opened or closed. Manned machinery spaces 
include the main machinery space and are either attended by the crew or 
are automated in accordance with part 62 of this subchapter to be 
comparable to an attended space.
    (2) In unmanned machinery spaces, all machinery inlets and 
discharges as described in paragraph (d)(1) of this section shall be 
remotely operable from a position above the freeboard deck unless 
otherwise approved and shall meet the access and marking requirements of 
paragraph (b)(2) of this section.
    (e)(1) Pipes terminating at the shell plating shall be fitted with 
bends or elbows between the outboard openings and the first rigid 
connection inboard. In no case shall such pipes be fitted in a direct 
line between the shell opening and the first inboard connection.
    (2) Seachests and other hull fittings shall be of substantial 
construction and as short as possible. They shall be located as to 
minimize the possibility of being blocked or obstructed.
    (3) The thickness of inlet and discharge connections outboard of the 
shutoff valves, and exclusive of seachests, must be not less than that 
of Schedule 80 for nominal pipe sizes through 8 inches, Schedule 60 for 
nominal pipe sizes above 8 inches and below 16 inches, and Schedule 40 
for nominal pipe sizes 16 inches and above.
    (f) Valves required by this section and piping system components 
outboard of such required valves on new vessel installations or 
replacements in vessels of 150 gross tons and over shall be of a steel, 
bronze, or ductile cast iron specification listed in Table 56.60-1(a). 
Lead or other heat sensitive materials having a melting point of 
1,700 deg. F. or less shall not be used in such service, or in any other 
application where the deterioration of the piping system in the event of 
fire would give rise to danger of flooding. Brittle materials such as 
cast iron shall not be used in

[[Page 204]]

such service. Where nonmetallic materials are used in a piping system, 
and shell closures are required by this section, a positive closure 
metallic valve is required (see also Sec. 56.60-25).
    (g) The inboard openings of ash and rubbish-chute discharges shall 
be fitted with efficient covers. If the inboard opening is located below 
the freeboard deck, the cover shall be watertight, and in addition, an 
automatic nonreturn valve shall be fitted in the chute in any easily 
accessible position above the deepest load line. Means shall be provided 
for securing both the cover and the valve when the chute is not in use. 
When ash-ejectors or similar expelling devices located in the boilerroom 
have the inboard openings below the deepest load line, they shall be 
fitted with efficient means for preventing the accidental admission of 
water. The thickness of pipe for ash ejector discharge shall be not less 
than Schedule 80.
    (h) Where deck drains, soil lines, and sanitary drains discharge 
through the shell in way of cargo tanks on tank vessels, the valves 
required by this section shall be located outside the cargo tanks. These 
valves shall meet the material requirements of paragraph (f) of this 
section. The piping led through such tanks shall be fitted with 
expansion bends where required, and shall be of steel pipe having a wall 
thickness of not less than five-eighths inch, except that the use of 
suitable corrosion-resistant material of lesser thickness will be given 
special consideration by the Commandant. All pipe joints within the 
tanks shall be welded. Soil lines and sanitary drains which pass through 
cargo tanks shall be provided with nonreturn valves with positive means 
of closing or other suitable means for preventing the entrance of gases 
into living quarters.
    (i) Except as provided for in Sec. 58.20-20(c) of this chapter, sea 
valves must not be held open with locks. Where it is necessary to hold a 
discharge or intake closed with a lock, either a locking valve may be 
located inboard of the sea valve, or the design must be such that there 
is sufficient freedom of motion to fully close the locked sea valve 
after an event, such as fire damage to the seat, causes significant 
leakage through the valve. Valves which must be opened in and emergency, 
such as bilge discharges or fire pump suctions must not be locked 
closed, whether they are sea valves or not.

[CGFR 68-82, 33 FR 18843; Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGFR 72-59R, 37 FR 6189, Mar. 25, 1972; CGD 81-
030, 53 FR 17837, May 18, 1988; CGD 77-140, 54 FR 40610, Oct. 2, 1989]



Sec. 56.50-96  Keel cooler installations.

    (a) Keel cooler installations shall meet the requirements of 
Sec. 56.50-95(d)(1) and (2), and (e)(3), and (f) except that shutoff or 
isolation valves will not be required for the inlet and discharge 
connections if:
    (1) The installation is forward of the collision bulkhead; or,
    (2) The installation is integral with the ship's hull such that the 
cooler tubes are welded directly to the hull of the vessel with the hull 
forming part of the tube and satisfies all of the following:
    (i) The cooler structure is fabricated from material of the same 
thickness and quality as the hull plating to which it is attached except 
that in the case of half round pipe lesser thickness may be used if 
specifically approved by the Commandant. In any case the structure, with 
the exception of the hull proper, need not exceed three-eighths inch in 
thickness.
    (ii) The flexible connections and all openings internal to the 
vessel, such as expansion tank vents and fills, in the installation are 
above the deepest load line and all piping components are Schedule 80 or 
thicker below the deepest load line.
    (iii) Full penetration welds are employed in the fabrication of the 
structure and its attachment to the hull.
    (iv) The forward end of the structure must be faired to the hull 
such that the horizontal length of the fairing is no less than four 
times the height of the structure, or be in a protected location such as 
inside a bow thruster trunk.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6189, Mar. 25, 1972; CGD 77-140, 54 FR 40611, Oct. 2, 1989]

[[Page 205]]



Sec. 56.50-97   Instrument, control and sampling piping (modifies 122.3).

    (a) Instrument, control and sampling piping must comply with 
paragraph 122.3 of ANSI-B31.1 except that:
    (1) Soldered type fittings may not be used.
    (2) The outside diameter of takeoff connections may not be less than 
0.840 inches for service conditions up to 900 psi or 800 deg. F., and 
1.050 inches for conditions that exceed either of these limits.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975]



Sec. 56.50-105   Low-temperature piping.

    (a) Class I-L. Piping systems designated to operate at temperatures 
below 0 deg. F. and pressures above 150 pounds per square inch gage 
shall be of Class I-L. Exceptions to this rule may be found in the 
individual requirements for specific commodities in subchapters D, I, 
and O of this chapter. The following requirements for Class I-L piping 
systems shall be satisfied:
    (1) Materials. All materials used in low temperature piping systems 
shall be selected from among those specifications listed in Table 56.50-
105 and shall satisfy all of the requirements of the specifications, 
except that:
    (i) The minimum service temperature as defined in Sec. 54.25-
10(a)(2) of this subchapter shall not be colder than that shown in Table 
56.50-105; and
    (ii) The material shall be tested for low temperature toughness 
using the Charpy V-notch specimen of ASTM E-23, ``Notched Bar Impact 
Testing of Metallic Materials'', Type A, Figure 4. The toughness testing 
requirements of subpart 54.05 of this subchapter shall be satisfied for 
each particular product form. Charpy V-notch tests shall be conducted at 
temperatures not warmer than 10 deg. F. below the minimum service 
temperature of the design, except that for service temperatures of --
320 deg. F. and below, the impact test may be conducted at the service 
temperature. The minimum average energy shall not be less than that 
shown in Table 56.50-105. In the case of steels conforming to the 
specifications of Table 54.25-20(a) of this subchapter the minimum 
lateral expansion shall not be less than that required in Sec. 54.25-20 
of this subchapter. The minimum energy permitted for a single specimen 
and the minimum subsize energies shall be those obtained by multiplying 
the average energy shown in Table 56.50-105 by the applicable fraction 
shown in Table 56.50-105(a).

      Table 56.50-105(a)--Charpy V-Notch Energy Multiplying Factors     
------------------------------------------------------------------------
                                                Factor for    Factor for
                                                  minimum      minimum  
       Charpy V-notch specimen size\1\            energy,       energy  
                                               average of 3     single  
                                               specimens\1\  specimen\1\
------------------------------------------------------------------------
10 x 10 mm...................................             1          2/3
10 x 7.5 mm..................................           5/6          5/9
10 x 5.0 mm..................................           2/3          4/9
10 x 2.5 mm..................................           1/2         1/3 
------------------------------------------------------------------------
\1\ Straight line interpolation for intermediate values is permitted.   

    (iii) Steels equivalent to those listed in Table 56.50-105 of this 
part, but not produced according to a particular ASTM specification, may 
be used only with the prior consent of the Marine Safety Center. Steels 
differing in chemical composition, mechanical properties or heat 
treatments from those specified may be specially approved by the Marine 
Safety Center. Similarly, aluminum alloys and other nonferrous materials 
not covered in Table 56.50-105 of this part may be specifically approved 
by the Marine Safety Center for service at any low temperature. There 
are restrictions on the use of certain materials in this part and in 
subchapter O of this chapter.
    (2) Piping weldments. Piping weldments shall be fabricated to 
satisfy the requirements of Sec. 57.03-1(b) of this subchapter in 
addition to subpart 56.70. Toughness testing of production weldments for 
low temperature piping systems and assemblies is not required.
    (3) Postweld heat treatment. All piping weldments shall be postweld 
heat treated for stress relief in accordance with the procedures of 
subpart 56.85. The only exceptions to this requirement are for materials 
which do not require postweld heat treatment as shown in Table 56.85-10. 
Relief from postweld heat treatment shall not be dependent upon pipe 
thickness or weld joint type.
    (4) Nonacceptable joints. Single welded butt joints with backing 
ring left in place, socket welds, slip-on flanges, pipe joining sleeves, 
and threaded

[[Page 206]]

joints shall not be used, except in small diameter instrument lines.
    (5) Other requirements. All other requirements of this part for 
Class I piping apply to Class I-L piping. Pressure testing must comply 
with subpart 56.97 of this part, and nondestructive testing of 
circumferentially welded joints must comply with Sec. 56.95-10. Seamless 
tubular products must be used except that, when the service pressure 
does not exceed 1724 KPa (250 psi), the Commanding Officer, Marine 
Safety Center, may give special consideration to appropriate grades of 
piping and tubing that are welded without the addition of filler metal 
in the root pass. Each production procedure and quality-control program 
for welded products must be acceptable to the Officer in Charge, Marine 
Inspection.
    (b) Class II-L. Piping systems designed to operate at temperatures 
below 0 deg. F. and pressures not higher than 150 pounds per square inch 
gage shall be of Class II-L. Exceptions to this rule may be found in the 
individual requirements for specific commodities in subchapter D (Tank 
Vessels) and I (Cargo and Miscellaneous Vessels) of this chapter. The 
following requirements for Class II-L piping systems shall be satisfied:
    (1) Materials must be the same as those required by paragraph (a)(1) 
of this section except that pipe and tubing of appropriate grades welded 
without the addition of a filler metal may be used. The Commandant may 
give special consideration to tubular products welded with the addition 
of filler metal.
    (2) Piping weldments shall be fabricated to satisfy the requirements 
of Sec. 57.03-1(b) of this subchapter in addition to subpart 56.70. 
Toughness testing of production weldments for low temperature piping 
systems and assemblies is not required.
    (3) All piping weldments shall be postweld heat treated for stress 
relief in accordance with the procedures of subpart 56.85. The only 
exceptions to this requirement are for materials which do not require 
postweld heat treatment as shown in Table 56.85-10 and for socket weld 
joints and slip-on flange weld attachments where the weld thickness does 
not exceed that exempted by this table. Otherwise, relief from post-weld 
heat treatment shall not be dependent upon pipe thickness or weld joint 
type.
    (4) Socket welds in nominal sizes above 3 inches, slip-on flanges in 
nominal sizes above 4 inches, and threaded joints in sizes above 1 inch 
shall not be used.
    (5) Pressure testing must comply with Subpart 56.97, and 
nondestructive testing of welded joints must comply with Sec. 56.95-10.
    (6) All other requirements contained in this part for Class II 
piping shall be applicable to Class II-L systems, except that 
Sec. 56.70-15(b)(3)(iv) shall not apply.

                      Table 56.50-105--Acceptable Materials and Toughness Test Criteria\2\                      
----------------------------------------------------------------------------------------------------------------
                                         ASTM                               Minimum service   Minimum avg Charpy
          Product form             specification\3\        Grade\4\           temperature       V notch energy  
----------------------------------------------------------------------------------------------------------------
Pipe...........................                       1.................  -30 deg. F........  20 ft. lb.        
                                                      3.................  -150 deg. F.......  25 ft. lb.        
Tube (carbon and low             A-333 and            4 (A-333 only)....  -100 deg. F.......  25 ft. lb.        
  alloy steels).                 A-334..............  6.................  -30 deg. F........  20 ft. lb.        
                                                      7.................  -100 deg. F.......  25 ft. lb.        
                                                      8.................  -320 deg. F.......  Refer to Sec.     
                                                                                               54.25-20 of this 
                                                                                               subchapter.      
    Pipe (Austenitic stainless   A-312..............  All Grades........  No limit..........  Austenitic        
                        steel).                                                                stainless steel  
                                                                                               piping need be   
                                                                                               impact tested    
                                                                                               only when        
                                                                                               toughness tests  
                                                                                               are specified in 
                                                                                               subpart 54.25 of 
                                                                                               this subchapter  
                                                                                               for plating of   
                                                                                               the same alloy   
                                                                                               designation. When
                                                                                               such toughness   
                                                                                               tests are        
                                                                                               required, the    
                                                                                               minimum average  
                                                                                               energy is 25 ft. 
                                                                                               lb.              

[[Page 207]]

                                                                                                                
Wrought welding fittings                              WPL1..............  -30 deg. F........  20 ft. lb.        
  (carbon and low alloy          A-420..............  WPL3..............  -150 deg. F.......  25 ft. lb.        
  steels).                                            WPL4..............  -100 deg. F.......  25 ft. lb.        
Forged or rolled flanges,                             LF1...............  -30 deg. F........  20 ft. lb.        
  forged fittings, valves        A-350\1\...........  LF2...............  -30 deg. F........  20 ft. lb.        
  and pressure parts                                  LF3...............  -150 deg. F.......  25 ft. lb.        
  (carbon and low alloy                               LF4...............  -100 deg. F.......  25 ft. lb.        
  steels).                                                                                                      
     Forged or rolled flanges,   A-182..............  Austenitic grades   No limit..........  These products    
    forged fittings, valves and                        only (304, 304H,                        need be impact   
     pressure parts (high alloy                        304L, 310, 316,                         tested only when 
                       steels).                        316H, 316L, 321,                        toughness tests  
                                                       321H, 347, 347H,                        are specified in 
                                                       348, 348H).                             subpart 54.25 of 
                                                                                               this subchapter  
                                                                                               for plating of   
                                                                                               the same alloy   
                                                                                               designation. When
                                                                                               such toughness   
                                                                                               tests are        
                                                                                               required, the    
                                                                                               minimum average  
                                                                                               energy is 25 ft. 
                                                                                               lb.              
Forged flanges, fittings,        A-522..............  9% Ni.............  -320 deg. F.......  Refer to Sec.     
                                                                                               54.25-20 of      
  and valves (9% nickel).                                                                       this subchapter.
Castings for valves and                               LCB...............  -30 deg. F........  20 ft. lb.        
  pressure parts (carbon         A-352\1\...........  LC1...............  -50 deg. F........  20 ft. lb.        
  and low alloy steels).                              LC2...............  -100 deg. F.......  25 ft. lb.        
                                                      LC3...............  -150 deg. F.......  25 ft. lb.        
       Castings for valves and   A-351..............  Austenitic grades   No limit, except -  No toughness      
     pressure parts (high alloy                        CF3, CF3A, CF8,     325 deg. F for      testing required 
                        steel).                        CF8A, CF3M, CF8M,   grades CF8C and     except for       
                                                       CF8C, CK20 only.    CK20.               service          
                                                                                               temperatures     
                                                                                               colder than -425 
                                                                                               deg. F for grades
                                                                                               CF3, CF3A, CF8,  
                                                                                               CF8A, CF3M, and  
                                                                                               CF8M. 25 ft. lb. 
                                                                                                average must be 
                                                                                                attained in     
                                                                                               these tests.     
Bolting........................  A-320..............  L7, L9, L10, L43..  -150 deg. F.......  20 ft. lb.        
                                                      B8D, B8T, B8F, B8M  -325 deg. F.......  No test required. 
                                                      2B8, B8C..........  No limit..........  No test required, 
                                                                                               except for       
                                                                                               service          
                                                                                               temperatures     
                                                                                               colder than -425 
                                                                                               deg. F. In such  
                                                                                               case the minimum 
                                                                                               average energy is
                                                                                               25 ft. lb.       
                                                      4.................  -150 deg. F.......  20 ft. lb.        
Nuts, bolting..................  A-194..............  8T, 8F............  -325 deg. F.......  No test required. 
                                                      8, 8C.............  No limit..........  Same requirement  
                                                                                               as comparable    
                                                                                               grades (B8, B8C) 
                                                                                               of bolting listed
                                                                                               above.           
\1\Quench and temper heat treatment may be permitted when specifically authorized by the Commandant. In those   
  cases the minimum average Charpy V-notch energy shall be specially designated by the Commandant.              
\2\Other material specifications for product forms acceptable under part 54 for use at low temperatures may also
  be used for piping systems provided the applicable toughness requirements of this Table are also met.         
\3\ Any repair method must be acceptable to the Commandant (G-MTH), and welding repairs as well as fabrication  
  welding must be in accordance with part 57 of this chapter.                                                   
\4\ The acceptability of several alloys for low temperature service is not intended to suggest acceptable       
  resistance to marine corrosion. The selection of alloys for any particular shipboard location must take       
  corrosion resistance into account and be approved by the Marine Safety Center.                                

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6189, 6190, Mar. 25, 1972; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CG 
79-108, 43 FR 46545, Oct. 10, 1978; CGD 74-289, 44 FR 26008, May 3, 
1979; CGD 77-140, 54 FR 40611, Oct. 2, 1989; CGD 83-043, 60 FR 24775, 
May 10, 1995]

[[Page 208]]



Sec. 56.50-110  Diving support systems.

    (a) In addition to the requirements of this part, piping for diving 
installations which is permanently installed on the vessel must meet the 
requirements of subpart B (Commercial Diving Operations) of part 197 of 
this chapter.
    (b) Piping for diving installations which is not permanently 
installed on the vessel need not meet the requirements of this part, but 
must meet the requirements of subpart B of part 197 of this chapter.
    (c) Piping internal to a pressure vessel for human occupancy (PVHO) 
need not meet the requirements of this part, but must meet the 
requirements of subpart B of part 197 of this chapter.

[CGD 76-009, 43 FR 53683, Nov. 16, 1978]



                        Subpart 56.60--Materials



Sec. 56.60-1   Acceptable materials and specifications (replaces 123 and Table 126.1 in ANSI-B31.1).

    (a)(1) The material requirements in this subpart shall be followed 
in lieu of those in 123 in ANSI-B31.1.
    (2) Materials used in piping systems must be selected from the 
specifications which appear in Table 56.60-1(a) of this section or Table 
56.60-2(a) of this part, or they may be selected from the material 
specifications of section I, III, or VIII of the ASME Code if not 
prohibited by a regulation of this subchapter dealing with the 
particular section of the ASME Code. Table 56.60-1(a) of this section 
contains only pipe, tubing, and fitting specifications. Determination of 
acceptability of plate, forgings, bolting, nuts, and castings may be 
made by reference to the ASME Code as previously described. 
Additionally, accepted materials for use as piping system components 
appear in Table 56.60-2(a) of this part. Materials conforming to 
specifications not described in this subparagraph must receive the 
specific approval of the Marine Safety Center before being used. 
Materials listed in Table 126.1 of ANSI B31.1 are not accepted unless 
specifically permitted by this paragraph.
    (b) Components made in accordance with the commercial standards 
listed in Table 56.60-1(b) of this section and made of materials 
complying with paragraph (a) this section may be used in piping systems 
within the limitations of the standards and within any further 
limitations specified in this subchapter.

 Table 56.60-1(a)--Adopted Specifications and Standards (Replaces Table 
                                 126.1).                                
   Note: Table 56.60-1(a) identifies the acceptable pipe, tubing, and   
fitting specifications intended for piping system use and replaces Table
  126.1 in ANSI B31.1. Piping system applications will be considered if 
    certification of mechanical properties is furnished. Without this   
  certification, use is limited to applications inside heat exchangers  
    that insure containment of the material inside a pressure shell.    
------------------------------------------------------------------------
                                                                        
------------------------------------------------------------------------
Pipe, seamless:                                                         
  A106 Carbon steel............  ANSI-B31.1............  ...............
  A335 Ferritic alloys.........  ANSI-B31.1............  ...............
  A376 Austenitic alloys.......  ANSI-B31.1............  (\1\).         
Pipe, seamless and welded:                                              
  A53 Types S, F, and E steel    ANSI-B31.1............  (\2\,\3\,\4\). 
   pipe.                                                                
  A312 Austenitic steel (welded  ANSI-B31.1............  (\1\,\4\).     
   with no filler metal).                                               
  A333 Low temperature steel     Sec. VIII, ASME Code..  (\5\).         
   pipe.                                                                
Pipe, welded:                                                           
  A134 Fusion welded steel       See footnote 7........  (\7\).         
   plate pipe.                                                          
  A135 ERW pipe................  ANSI-B31.1............  (\3\).         
  A139 Grade B only, fusion      ANSI-B31.1............  (\8\).         
   welded steel pipe.                                                   
  A358 Electric fusion welded    ANSI-B31.1............  (\1\,\4\,\9\). 
   pipe, high temperature,                                              
   austenitic.                                                          
Pipe, forged and bored:                                                 
  A369 Ferritic alloy..........  ANSI-B31.1............  ...............
  A430 Austenitic alloy........  ANSI-B31.1............  (\1\).         
Pipe, centrifugally cast:......  (None applicable).....  (\1\\9\)       
Tube, seamless:                                                         
  A179 Carbon steel heat         UCS23, Sec. VIII, ASME  (\11\).        
   exchanger and condenser        Code.                                 
   tubes.                                                               
  A192 Carbon steel boiler       PG23.1, Sec. I, ASME    (\10\).        
   tubes.                         Code.                                 
  A199 Alloy steel condenser     UCS23, Sec. VIII, ASME  ...............
   tubes.                         Code.                                 
  A210 Medium carbon boiler      PG23.1, Sec. I, ASME    ...............
   tubes.                         Code.                                 
  A213 Ferritic and austenitic   PG23.1, Sec. I, ASME    (\1\).         
   boiler tubes.                  Code.                                 

[[Page 209]]

                                                                        
Tube, seamless and welded:                                              
  A268 Seamless and ERW          PG23.1, Sec. I, ASME    (\4\).         
   ferritic stainless tubing.     Code.                                 
  A334 Seamless and welded (no   UCS23, Sec. VIII, ASME  (\4\,\5\).     
   added filler metal) carbon     Code.                                 
   and low alloy tubing for low                                         
   temperature.                                                         
Tube, welded:                                                           
  A178 (Grades A and C only)     PG23.1, Sec. I, ASME    (\10\ Grade A) 
   ERW boiler tubes.              Code.                   (\4\).        
  A214 ERW heat exchanger and    UCS27, Sec. VIII, ASME  ...............
   condenser tubes.               Code.                                 
  A226 ERW boiler and            PG23.1, Sec. I, ASME    (\4\,\10\).    
   superheater tubes.             Code.                                 
  A249 Welded austenitic boiler  PG23.1, Sec. I, ASME    (\1\,\4\).     
   and heat exchanger tubes (no   Code.                                 
   added filler metal).                                                 
Wrought fittings (factory                                               
 made):                                                                 
  A234 Carbon and ferritic       Conforms to applicable  (\12\).        
   alloys.                        American National                     
                                  Standards (ANSI-B16.9                 
                                  and ANSI-B16.11).                     
  A403 Austenitic alloys.......  ......do..............  (\12\).        
  A420 Low temperature carbon    ......do..............  (\12\).        
   and steel alloy.                                                     
Castings,\13\ iron:                                                     
  A47 Malleable iron...........  Conform to applicable   (\14\).        
                                  American National                     
                                  Standards or refer to                 
                                  UCI-23 or UCD-23,                     
                                  Sec. VIII, ASME Code.                 
  A126 Gray iron...............  ......do..............  (\14\).        
  A197 Malleable iron..........  ......do..............  (\14\).        
  A395 Ductile iron............  UCD-23, Sec. VIII,      (\14\).        
                                  ASME Code.                            
  A536 Ductile iron............  See footnote 20.......  (\20\).        
                                                                        
------------------------------------------------------------------------
                                                                        
                        Nonferrous Materials \15\                       
                                                                        
------------------------------------------------------------------------
Pipe, seamless:                                                         
  B42 Copper...................  UNF23, Sec. VIII, ASME  (\16\).        
                                  Code.                                 
  B43 Red brass................  ......do..............  ...............
  B241 Aluminum alloy..........  ......do..............  ...............
Pipe and tube, seamless:                                                
  B161 Nickel..................  ......do..............  ...............
  B165 Nickel-copper...........  ......do..............  ...............
  B167 Ni-Cr-Fe................  ......do..............  ...............
  B315 Copper-silicon..........  ......do..............  ...............
Tube, seamless:                                                         
  B68 Copper...................  See footnote 17.......  (\16\,\17\,\18\
                                                          ).            
  B75 Copper...................  UNF23, Sec. VIII, ASME  (\16\).        
                                  Code.                                 
  B88 Copper...................  See footnote 17.......  (\16\,\17\).   
  B111 Copper and copper alloy.  UNF23, Sec. VIII, ASME  ...............
                                  Code.                                 
  B210 Aluminum alloy, drawn...  ......do..............  ...............
  B234 Aluminum alloy, drawn...  ......do..............  ...............
  B280 Copper tube for           See footnote 17.......  (\16\,\17\).   
   refrigeration service.                                               
Welding fittings:                                                       
  B361 Wrought aluminum welding  Shall meet ANSI         ...............
   fittings.                      Standards.                            
------------------------------------------------------------------------


----------------------------------------------------------------------------------------------------------------
                                                            Longitudinal                                        
           ASTM specification              Minimum tensile      joint       P No.    Allowable stresses (p.s.i.)
                                                             efficiency                                         
----------------------------------------------------------------------------------------------------------------
A134:                                                                                                           
  Grade 285A............................            45,000         0.80           1          11,250 x 0,8=9,000.
  Grade 285B............................            50,000         0.80           1         12,500 x 0,8=10,000.
  Grade 285C............................            55,000         0.80           1        13,750 x 0,8=11,000. 
----------------------------------------------------------------------------------------------------------------
Note: When using 104.1.2 in ANSI-B31.1 to compute wall thickness, the stress shown here shall be applied as     
  though taken from the stress tables. An additional factor of 0.8 may be required by Sec.  56.07-10(c) and (e).
                                                                                                                
\1\For austenitic materials where two sets of stresses appear, use the lower values.                            
\2\Type F (Furnace welded, using open hearth, basic oxygen, or electric furnace only) limited to Class II       
  applications with a maximum service temperature of 450 deg. F. Type E (ERW grade) limited to maximum service  
  temperature of 650 deg. F, or less.                                                                           
\3\Electric resistance welded pipe or tubing of this specification may be used to a maximum design pressure of  
  350 pounds per square inch gage.                                                                              
\4\Refer to limitations on use of welded grades given in Sec.  56.60-2(b).                                      
\5\Use generally considered for Classes I-L and II-L applications. For Class I-L service only, the seamless     
  grade is permitted. For other service refer to footnote 4 and to Sec.  56.50-105.                             

[[Page 210]]

                                                                                                                
\6\Furnace lap or furnace butt grades only. Limited to Class II applications only where the maximum service     
  temperature is 450 deg. F, or less.                                                                           
\7\Limited to Grades 285A, 285B, and 285C only (straight and spiral seam). Limited to Class II applications only
  where maximum service temperature is 300 deg. F or less for straight seam, and 200 deg. F or less for spiral  
  seam.                                                                                                         
\8\Limited to Class II applications where the maximum service temperature is 300 deg. F or less for straight    
  seam and 200 deg. F or less for spiral seam.                                                                  
\9\For Class I applications only the Class I Grade of the specification may be used.                            
\10\When used in piping systems, a certificate shall be furnished by the manufacturer certifying that the       
  mechanical properties at room temperature specified in ASTM A520 have been met. Without this certification,   
  use is limited to applications within heat exchangers.                                                        
\11\When used in piping systems, a certificate shall be furnished by the manufacturer certifying that the       
  mechanical properties for A192 in ASTM A520 have been met. Without this certification, use is limited to      
  applications within heat exchangers.                                                                          
\12\Hydrostatic testing of these fittings is not required but all fittings shall be capable of withstanding     
  without failure, leakage, or impairment of serviceability, a hydrostatic test of 1\1/2\ times the designated  
  rating pressure.                                                                                              
\13\Other acceptable iron castings are in UCI-23 and UCD-23 of section VIII of the ASME Code. (See also Secs.   
  56.60-10 and 56.60-15.) Acceptable castings of materials other than cast iron may be found in section I or    
  VIII of the ASME Code.                                                                                        
\14\Acceptable when complying with American National Standards. Ductile iron is acceptable for temperatures not 
  exceeding 650 deg. F. For pressure temperature limitations refer to UCD-3 of section VIII of the ASME Code.   
  Other grades of cast iron are acceptable for temperatures not exceeding 450 deg. F. For pressure temperature  
  limitations refer to UCI-3 of section VIII of the ASME Code.                                                  
\15\For limitations in use refer to Secs.  56.10-5(c) and 56.60-20.                                             
\16\ Copper pipe must not be used for hot oil systems except for short flexible connections at burners. Copper  
  pipe must be annealed before installation in Class I piping systems. See also Secs.  56.10-5(c) and 56.60-20. 
\17\The stress values shall be taken from UNF23 of section VIII of the ASME Code for B75 annealed and light     
  drawn temper as appropriate.                                                                                  
\18\B68 shall be acceptable if provided with a mill hydrostatic or eddy current test.                           
\19\ Centrifugally cast pipe must be specifically approved by the Marine Safety Center.                         
\20\ Limited to pipe fittings and valves. See Sec.  56.60-15(d) for additional information.                     


    Table 56.60-1(b)--Adopted Standards Applicable to Piping Systems    
                         (Replaces Table 126.1)                         
                                                                        
                                                                        
 ANSI Standards (American National Standards Institute), 1430 Broadway, 
                           New York, NY 10018.                          
------------------------------------------------------------------------
B1.1..................................  Unified Screw Threads.          
B1.20.1...............................  Pipe Threads, General Purpose.  
B1.20.3...............................  Dryseal Pipe Threads.           
B2.1..................................  Pipe Threads.                   
B2.2..................................  [Reserved]                      
B16.1.................................  C.I. Flanges and Fittings--     
                                         Classes 125 and 250 Only.      
B16.3.................................  M.I. Threaded Fittings--Classes 
                                         150 and 300.                   
B16.4.................................  C.I. Threaded Fittings--Classes 
                                         125 and 250.                   
B16.5.................................  Steel Pipe Flanges and Flanged  
                                         Fittings.\3\                   
B16.9.................................  Steel Buttwelding Fittings.\3\  
B16.10................................  Dimensions of Ferrous Valves.   
B16.11................................  Steel S.W. and Threaded         
                                         Fittings.                      
B16.14................................  Ferrous-Threaded Plugs, Bushings
                                         and Locknuts.\4\               
B16.15................................  Cast Bronze Threaded Fittings-- 
                                         Classes 125 & 250.\4\          
B16.18................................  Cast Copper Alloy Solder        
                                         Joints.\4\                     
B16.20................................  Ring Joint Gaskets--Steel       
                                         Flanges.                       
B16.21................................  Non-metallic Gaskets for        
                                         Flanges.                       
B16.22................................  Wrought Copper and Copper Alloy 
                                         Solder Joint Fittings.\4\      
B16.23................................  Cast Copper Alloy Solder-Joint  
                                         Drainage Fittings.\4\          
B16.24................................  Bronze Pipe Flanges and Flanged 
                                         Fittings--Class 150 and 300.\3\
B16.25................................  Butt Welding Ends--Pipe, Valves,
                                         Flanges, & Fittings.           
B16.28................................  Wrought Steel Buttwelding Short 
                                         Radius Elbows and Returns.\4\  
B16.29................................  Wrought Copper and Wrought-     
                                         Copper Alloy Solder Joint      
                                         Drainage Fittings.\4\          
B16.34................................  Valves--Flanged, Threaded and   
                                         Welding end.\3\                
B16.42................................  Ductile Iron Pipe Flanges and   
                                         Fittings.\3\                   
B18.2.................................  [Reserved]                      
B18.2.1...............................  Square and Hex Bolts and Screws,
                                         Inch series.                   
B18.2.2...............................  Square and Hex Nuts.            
------------------------------------------------------------------------
 ASTM Standards (American Society for Testing and Materials), 1916 Race 
                      St., Philadelphia, PA 19103.                      
------------------------------------------------------------------------
F682..................................  Wrought Carbon Steel Sleeve-Type
                                         Couplings.                     
F1006.................................  Entrainment Separators for Use  
                                         in Marine Piping               
                                         Applications.\4\               
F1007.................................  Pipe Line Expansion Joints of   
                                         the Packed Slip Type for Marine
                                         Applications.                  
F1020.................................  Line Blind Valves for Marine    
                                         Applications.\4\               
F1120.................................  Circular Metallic Bellows Type  
                                         Expansion Joints.              
F1123.................................  Non-Metallic Expansion Joints.  
F1139.................................  Steam Traps and Drains.         
F1172.................................  Fuel Oil Meters of the          
                                         Volumetric Positive            
                                         Displacement Type.             
F1173.................................  Epoxy Resin Fiberglass Pipe and 
                                         Fittings to be Used for Marine 
                                         Applications.                  
F1199.................................  Cast and Welded Pipe Line       
                                         Strainers.                     
F1200.................................  Fabricated (Welded) Pipe Line   
                                         Strainers.                     
F1201.................................  Fluid Conditioner Fittings in   
                                         Piping Applications Above 0    
                                         deg.F.                         
------------------------------------------------------------------------
  EJMA Standards (Expansion Joint Manufacturers Association, Inc.), 25  
                   North Broadway, Tarrytown, NY 10591                  
------------------------------------------------------------------------
    Standards of the Expansion Joint Manufacturers Association, Inc.    
------------------------------------------------------------------------
 FCI Standards (Fluid Controls Institute, Inc.), 31 South Street, Suite 
                       303, Morristown, NJ 07960.                       
------------------------------------------------------------------------
FCI 69-1..............................  Pressure Rating Standard for    
                                         Steam Traps.\4\                
------------------------------------------------------------------------
 MSS Standards (Manufacturers' Standardization Society of the Valve and 
        Fittings Industry), 127 Park Street NE, Vienna, VA 22180.       
------------------------------------------------------------------------
B36.10................................  Wrought-Steel & Iron Pipe.      
B36.19................................  Stainless Steel Pipe.           
------------------------------------------------------------------------
 MSS Standards (Manufacturers' Standardization Society of the Valve and 
  Fittings Industry), 1815 North Fort Myer Drive, Arlington, Va. 22209. 
------------------------------------------------------------------------
SP-6..................................  Finishes-On Flanges, Valves &   
                                         Fittings.                      
SP-9..................................  Spot-Facing.                    
SP-25.................................  Standard Marking System for     
                                         Valves, Fittings, Flanges and  
                                         Unions.                        
SP-37.................................  [Reserved]                      
SP-42.................................  [Reserved]                      
SP-44.................................  Steel Pipe Line Flanges.\4\     
SP-45.................................  Bypass and Drain Connection.    
SP-51.................................  Class 150LW Corrosion Resistant 
                                         Cast Flanges and Flanged       
                                         Fittings.\4\                   
SP-53.................................  Magnetic Particle Inspection--  
                                         Steel Castings.                
SP-55.................................  Visual Inspection--Steel        
                                         Castings.                      

[[Page 211]]

                                                                        
SP-58.................................  Pipe Hangers & Supports.        
SP-61.................................  Hydrostatic Testing Steel       
                                         Valves.                        
SP-66.................................  [Reserved]                      
SP-67.................................  Butterfly Valves.\2\ \4\        
SP-69.................................  Pipe Hangers and Supports--     
                                         Selection and Application.     
SP-72.................................  Ball Valves with Flanged or Butt-
                                         Welding Ends for General       
                                         Service.\4\                    
SP-73.................................  Silver Brazing Joints for       
                                         Wrought and Cast Solder Joint  
                                         Fittings.                      
SP-83.................................  Carbon Steel Pipe Unions Socket-
                                         Welding and Threaded.          
------------------------------------------------------------------------
\1\ [Reserved]                                                          
\2\ In addition, for bronze valves, adequacy of body shell thickness    
  shall be satisfactory to the Marine Safety Center. Refer to Sec.      
  56.60-10 of this part for cast iron valves.                           
\3\ Mill or manufacturer's certification is not required, except where a
  needed portion of the required marking is deleted due to size or is   
  absent due to age of existing stocks.                                 
\4\ Because this standard offers the option of several materials, some  
  of which are not generally acceptable to the Coast Guard, compliance  
  with the standard does not necessarily indicate compliance with these 
  regulations. The marking on the component or the manufacturer or mill 
  certificate must indicate the material specification and/or grade as  
  necessary to fully identify the materials used. The material used must
  comply with the requirements in this subchapter relating to the       
  particular application.                                               

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGFR 72-59R, 37 FR 6190, Mar. 25, 1972; CGD 72-
206R, 38 FR 17229, June 29, 1973; CGD 73-248, 39 FR 30839, Aug. 26, 
1974; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CGD 77-140, 54 FR 40611, 
Oct. 2, 1989; 55 FR 39968, 39969, Oct. 1, 1990; CGD 95-027, 61 FR 26001, 
May 23, 1996]



Sec. 56.60-2  Limitations on materials.

    (a) Stresses. The maximum stress in the materials listed in Table 
56.60-1(a) must be 80 percent of the value contained in the designated 
source of allowable stress values, unless the dynamic effect is 
accounted for in the design in accordance with the requirement contained 
in Sec. 56.07-10(c) of this chapter. Further limitations on allowable 
stress values are contained in Sec. 56.07-10 (c) and (e). Italicized 
values of stress in referenced specifications shall not be used.
    (b) Welded pipe and tubing. The following restrictions apply to the 
use of welded pipe and tubing specifications when utilized in piping 
systems, and not when utilized in heat exchanger, boiler, pressure 
vessel, or similar components:
    (1) Longitudinal joint. Wherever possible, the longitudinal joint of 
a welded pipe shall not be pierced with holes for branch connections or 
other purposes.
    (2) Class II. Use unlimited except as restricted by maximum 
temperature or pressure specified in Table 56.60-1(a) or by the 
requirements contained in Sec. 56.10-5(b) of this chapter.
    (3) Class I. (i) For those specifications in which a filler metal is 
used, the following applies to the material as furnished prior to any 
fabrication:
    (A) For use in service above 800 deg. F. full welding procedure 
qualifications by the Coast Guard are required. See part 57 of this 
subchapter.
    (B) Ultrasonic examination as required by item S-6 in ASTM A-376 
shall be certified as having been met in all applications except where 
100 percent radiography is a requirement of the particular material 
specification.
    (ii) For those specifications in which no filler metal is used in 
the welding process, the following applies:
    (A) Ultrasonic examination as required by item S-6 in ASTM A-376 
shall be certified as having been met for service above 800 deg. F.


  Table 56.60-2(a)--Adopted Specifications Not Listed in the ASME Code  
------------------------------------------------------------------------
                                       Source of                        
       ASTM specifications         allowable stress          Notes      
------------------------------------------------------------------------
                           Ferrous Materials1                           
------------------------------------------------------------------------
Bar stock:                                                              
  A276 (Grades                    See footnote 4....  (4).              
    304-A, 304L-A, 310-A, 316-A,                                        
   316L-A, 321-A, 347-A, and 348-                                       
   A).                                                                  
  A575  and  A576                                                       
    (Grades 1010-1030)..........  See footnote 2....  (2,  3).          
------------------------------------------------------------------------
                          Nonferrous Materials                          
------------------------------------------------------------------------
Bar stock:                                                              
  B16 (soft and half hard         See footnote 5....  (5,7).            
   tempers).                                                            
  B21 (alloys A, B, and C)......  See footnote 8....  (8).              
  B124:                                                                 
    Alloy 377...................  See footnotes 5     (5,9).            
                                   and 9.                               
    Alloy 464...................  See footnote 8....  (8, 10).          
    Alloy 655...................  See footnote 11...  (11).             
    Alloy 642...................  See footnote 12...  (7,12).           
    Alloy 630...................  See footnote 13...  (7,13).           
    Alloy 485...................  See footnote 8....  (8,10).           
Forgings:                                                               
  B283 (forging brass)..........  See footnotes 5     (5,9).            
                                   and 9.                               
Castings:                                                               
  B26...........................  See footnotes 5,    (5, 14, 15).      
                                   14, and 15.                          
  B85...........................  See footnotes 5,    (5, 14, 15).      
                                   14, and 15.                          
------------------------------------------------------------------------
\1\ For limitations in use refer to Sec.  56.60-5.                      
\2\ Allowable stresses shall be the same as those listed in UCS23 of    
  section VIII of the ASME Code for SA-675 material of equivalent       
  tensile strength.                                                     

[[Page 212]]

                                                                        
\3\ Physical testing shall be performed as for material manufactured to 
  ASME Specification SA-675, except that the bend test shall not be     
  required.                                                             
\4\ Allowable stresses shall be the same as those listed in UCS23 of    
  section VIII of the ASME Code for the corresponding SA-182 material.  
\5\ Limited to air and hydraulic service with a maximum design          
  temperature of 150  deg.F. The material must not be used for salt     
  water service or other fluids that may cause dezincification or stress
  corrosion cracking.                                                   
\6\ [Reserved]                                                          
\7\ A mercurous nitrate test, in accordance with ASTM B154, shall be    
  performed on a representative model of each finished product design.  
\8\ Allowable stresses shall be the same as those listed in UNF23 of    
  section VIII of the ASME Code for SB-171, naval brass.                
\9\ A mercurous nitrate test, in accordance with ASTM B154, shall be    
  performed on a representative model for each finished product design. 
  Tension tests shall be performed to determine tensile strength, yield 
  strength, and elongation. Minimum values shall be those listed in     
  table 3 of ASTM B283.                                                 
\10\ Physical testing, including mercurous nitrate test, shall be       
  performed as for material manufactured to ASTM B21.                   
\11\ Physical testing shall be performed as for material manufactured to
  ASTM B96. Allowable stresses shall be the same as those listed in     
  UNF23 of section VIII of the ASME Code for SB-96 and shall be limited 
  to a maximum allowable temperature of 212 deg. F.                     
\12\ Physical testing shall be performed as for material manufactured to
  ASTM B171, alloy D. Allowable stresses shall be the same as those     
  listed in UNF23 of section VIII of the ASME Code for SB-171, aluminum 
  bronze D.                                                             
\13\ Physical testing shall be performed as for material manufactured to
  ASTM B171, alloy E. Allowable stresses shall be the same as those     
  listed in UNF23 of section VIII of the ASME Code for SB-171, aluminum 
  bronze, alloy E.                                                      
\14\ Tension tests shall be performed to determine tensile strength,    
  yield strength, and elongation. Minimum values shall be those listed  
  in table X-2 of ASTM B85.                                             
\15\ Those alloys with a maximum copper content of 0.6 percent or less  
  shall be acceptable under this specification. Cast aluminum shall not 
  be welded or brazed.                                                  
                                                                        
Note: This Table 56.60-2(a) is a listing of adopted bar stock and       
  nonferrous forging and casting specifications not listed in the ASME  
  Code. Particular attention should be given to the supplementary       
  testing requirements and service limitations contained in the         
  footnotes.                                                            

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 72-104R, 37 FR 14233, July 18, 1972; CGD 73-
248, 39 FR 30839, Aug. 26, 1974; CGD 73-254, 40 FR 40165, Sept. 2, 1975; 
CGD 77-140, 54 FR 40612, Oct. 2, 1989; CGD 95-012, 60 FR 48050, Sept. 
18, 1995; CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 56.60-3   Ferrous materials.

    (a) Ferrous pipe used for salt water service must be protected 
against corrosion by hotdip galvanizing or by the use of extra heavy 
schedule material.
    (b) (Reproduces 123.2.3(c)). Carbon or alloy steel having a carbon 
content of more than 0.35 percent may not be used in welded construction 
or be shaped by oxygen cutting process or other thermal cutting process.

[CGD 73-254, 40 FR 40165, Sept. 2, 1975]



Sec. 56.60-5   Steel (High temperature applications).

    (a) (Reproduces 123.2.3(a).) Upon prolonged exposure to temperatures 
above 775 deg. F., the carbide phase of plain carbon steel, plain nickel 
alloy steel, carbon-manganese alloy steel, manganese-vanadium alloy 
steel, and carbon-silicon steel may be converted to graphite.
    (b) (Reproduces 123.2.3(b).) Upon prolonged exposure to temperatures 
above 875 deg. F., the carbide phase of alloy steels, such as carbon-
molybdenum, manganese-molybdenum-vanadium, manganese-chromium-vanadium 
and chromium-vanadium, may be converted to graphite.
    (c) [Reserved]
    (d) The design temperature of a piping system employing one or more 
of the materials listed in paragraphs (a), (b), and (c) of this section 
shall not exceed the lowest graphitization temperature specified for 
materials used.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 72-104R, 37 FR 14233, July 18, 1972; CGD 73-
248, 39 FR 30839, Aug. 26, 1974; CGD 73-254, 40 FR 40165, Sept. 2, 1975]



Sec. 56.60-10  Cast iron and malleable iron.

    (a) The low ductility of cast iron and malleable iron should be 
recognized and the use of these metals where shock loading may occur 
should be avoided. Cast iron and malleable iron components shall not be 
used at temperatures above 450  deg.F. Cast iron and malleable iron 
fittings conforming to the specifications of Table 56.60-1(a) of this 
part may be used at pressures not exceeding the limits of the applicable 
standards of Table 56.60-1(b) of this part at temperatures not exceeding 
450  deg.F. Valves of either of these materials may be used if they 
conform to the standards for class 125 and class 250 flanges and flanged 
fittings in ANSI B16.1 and if their service does not exceed the rating 
as marked on the valve.
    (b) Cast iron and malleable iron shall not be used for valves or 
fittings in lines carrying flammable or combustible fluids1 which 
are directly connected to, or in the proximity of, equipment or other 
lines having open flame, or any parts operating at temperatures above 
500 deg. F. Cast iron shall

[[Page 213]]

not be used for hull fittings, or in systems conducting lethal products.
---------------------------------------------------------------------------

    1For definitions of flammable or combustible fluids, see 
Secs. 30.10-15 and 30.10-22 of subchapter D (Tank Vessels) of this 
chapter.
---------------------------------------------------------------------------

    (c) Malleable iron and cast iron valves and fittings, designed and 
marked for Class 300 refrigeration service, may be used for such service 
provided the pressure limitation of 300 pounds per square inch is not 
exceeded. Malleable iron flanges of this class may also be used in sizes 
4 inches and smaller (oval and square design).

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CGD 77-
140, 54 FR 40612, Oct. 2, 1989; CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 56.60-15  Ductile iron.

    (a) Ductile cast iron components made of material conforming to ASTM 
A395 may be used within the service restrictions and pressure-
temperature limitations of UCD-3 of section VIII of the ASME Code.
    (b) Ductile iron castings conforming to ASTM A 395 may be used in 
hydraulic systems at pressures in excess of 7500 kilopascals (1000 
pounds per square inch) gage, provided the following:
    (1) The castings receive a ferritizing anneal when the as-cast 
thickness does not exceed one inch;
    (2) Large castings for components, such as hydraulic cylinders, are 
examined as specified for a casting quality factor of 90 percent in 
accordance with UG-24 of section VIII of the ASME Code; and
    (3) The castings are not welded, brazed, plugged, or otherwise 
repaired.
    (c) After machining, ductile iron castings must be hydrostatically 
tested to twice their maximum allowable working pressure and must show 
no leaks.
    (d) Ductile iron castings exhibiting less than 12 percent elongation 
in 50 millimeters (2 inches) when subjected to a tensile test must meet 
the requirements for cast iron in this part.

[CGD 77-140, 54 FR 40612, Oct. 2, 1989, as amended by CGD 95-027, 61 FR 
26001, May 23, 1996]



Sec. 56.60-20  Nonferrous materials.

    Nonferrous materials listed in this subpart may be used in piping 
systems under the following conditions (see also Sec. 56.10-5(c)):
    (a) The low melting points of many nonferrous metals and alloys, 
such as aluminum and aluminum alloys, must be recognized. These types of 
heat sensitive materials must not be used to conduct flammable, 
combustible, or dangerous fluids, or for vital systems unless approved 
by the Marine Safety Center.

    Note: For definitions of flammable or combustible fluids, see 
Secs. 30.10-15 and 30.10-22 or parts 151-154 of this chapter. Dangerous 
fluids are those covered by regulations in part 98 of this chapter.

    (b) The possibility of galvanic corrosion due to the relative 
solution potentials of copper and aluminum and their alloys should be 
considered when used in conjunction with each other or with steel or 
with other metals and their alloys when an electrolyte is present.
    (c) A suitable thread compound must be used in making up threaded 
joints in aluminum pipe to prevent seizing which might cause leakage and 
perhaps prevent disassembly. Pipe in the annealed temper should not be 
threaded.
    (d) The corrosion resistance of copper bearing aluminum alloys in a 
marine atmosphere is poor and alloys with copper contents exceeding 0.6 
percent should not be used. Refer to Table 56.60-2(a) of this part for 
further guidance.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40612, Oct. 2, 1989; CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 56.60-25  Nonmetallic materials.

    (a) Plastic pipe-nonvital service. Plastic pipe may be used for 
nonvital fresh and salt water service, including drains for waste and 
sewage services not involving treatment chemicals incompatible with the 
pipe, or flammable vapors from degenerating waste or other sources, 
subject to the following limitations:
    (1) Penetrations of required water-tight decks and bulkheads by any 
plastic pipe systems are prohibited, except when:
    (i) Each such penetration is accomplished using an acceptable 
metallic spool piece, welded or otherwise attached to the bulkhead or 
deck by an accepted method; and

[[Page 214]]

    (ii) An acceptable metallic shutoff valve is installed adjacent to 
the spool piece. This valve shall be operable from above the bulkhead 
deck. If two valves are installed, one on either side of the bulkhead, 
the valves need not be operable from above the bulkhead deck provided 
immediate access to both is possible. Where both plastic and metallic 
pipes are used in a bulkhead penetrating system and where the two 
materials exist entirely on opposite sides of the bulkhead, the required 
shutoff valve shall be installed at the bulkhead in the metallic part of 
the system, and may be locally operated provided immediate access is 
possible.
    (2) Penetrations of Classes ``A'' and ``B'' fire control bulkheads 
and decks by plastic pipe are prohibited without special precautions 
being taken to insure that the fire integrity of the divisions are not 
compromised. Methods of penetration shall be detailed on plan 
submission.
    (3) No use of plastic piping within a concealed space in an 
accommodation or service area is permitted unless--
    (i) Each trunk or duct containing such piping is completely 
surrounded by ``A'' class divisions; or
    (ii) An approved smoke-detection system is fitted in the concealed 
space, and each penetration of a bulkhead or deck, and each installation 
of a draft stop, is made in accordance with paragraph (a)(2) of this 
section to maintain the integrity of fire divisions.
    (4) Classes ``A'' and ``B'' divisions are defined in subpart 32.57 
of subchapter D (Tank Vessels), subpart 72.05 of subchapter H (Passenger 
Vessels), and subpart 92.07 of subchapter I (Cargo and Miscellaneous 
Vessels) of this chapter. Concealed spaces are areas behind ceilings or 
linings or between double bulkheads.
    (5) Plastic pipe may not be used outboard of the required metallic 
valve in any piping system penetrating the vessel's shell. (See 
Sec. 56.50-95(f).) Where this shell valve and the plastic pipe are in 
the same unmanned space, the valve shall be operable from above the 
freeboard deck.
    (6) The maximum pressure and temperature of the system shall not 
exceed 150 pounds per square inch and 140 deg. F., respectively; or as 
may be specifically authorized by the Commandant.
    (7) Materials used in the fabrication of plastic pipe shall be 
unplasticized rigid polyvinylchloride (PVC) conforming to the following 
requirements:
    (i) The material specifications covering materials fabricated of 
rigid polyvinylchloride (PVC), shall comply with the following standard 
specifications issued by the American Society of Testing Materials, 
subject to the limitations noted in this subpart:

    (A) Pipe (PVC).
ASTM D1785 (Schedule 40, 80, 120).
ASTM D2241 (Standard Dimension Ratio).
ASTM D2665.

    (B) Fittings (PVC).
ASTM D2464 (Schedule 80 threaded).
ASTM D2466 (Schedule 40 socket).
ASTM D2467 (Schedule 80 socket).
ASTM D2665.

    (ii) PVC pipe that is to be used for potable water shall bear the 
seal of approval or NSF mark of the National Sanitation Foundation 
Testing Laboratory, Incorporated, School of Public Health, University of 
Michigan, Ann Arbor, Mich. 48103.
    (8) In using PCV pipe, a schedule or Standard Dimension Ratio must 
be chosen so that the maximum value of hoop stress in service will not 
be more than 20 percent of the specified minimum burst stress as listed 
in the applicable specification. Pipe and fittings meeting ASTM D2665 
are limited to drain, waste, and associated vent services.
    (9) Pipe joints shall be of the slip sleeve, socket, or screwed 
type. Screwed joints may be used only on D1785 pipe having at least 
Schedule 80 wall thickness, or Class T, D2241 pipe.
    (10) Materials, such as glass reinforced resins not meeting ASTM 
F1173 or other plastics, may be authorized by the Commandant (G-MSE) if 
full mechanical and physical properties and chemical description are 
furnished. Flammability of the material must be determined by the 
standard test methods ASTM D635 and ASTM D2863. The average extent of 
burning must be less than 0.394 inches (10mm), the average time of 
burning must be less than 50

[[Page 215]]

seconds, and the limiting oxygen index must be greater than 21.
    (11) Plastic piping intended for an accommodation area, a service 
area, or a control station must comply with the standard for the spread 
of flame or smoke established by Commandant (G-MSE).
    (b) Plastic pipe-vital service. Plastic pipe may be used for vital 
fresh and salt water service, subject to the limitations for nonvital 
service in paragraph (a) of this section, and the following:
    (1) Vital machinery served by plastic piping must be duplicated by 
equivalent machinery served entirely by conventional metallic piping 
unless allowed otherwise by this section. When such machinery is in 
separate watertight compartments, or is located or insulated so that 
damage to both by a single localized fire is unlikely, both may be 
fitted with plastic piping. (The Marine Inspector will make the final 
determination as to the adequacy of the separation between duplicate 
machinery installed in the same watertight compartment.) In no case may 
failure of plastic piping on one set of machinery affect the operation 
of the other machinery. Alternatively, a single set of machinery may be 
installed with parallel, but independent, piping systems, one of plastic 
and the other of metallic materials. Where metallic piping is required 
to duplicate or parallel plastic piping, failure of the plastic piping 
must not interfere with the proper operation of the metallic piping or 
of the machinery it serves.
    (c) Nonmetallic flexible hose. (1) Nonmetallic flexibile hose must 
be in accordance with SAE J-1942 and may be installed only in vital and 
nonvital fresh and salt water systems, nonvital pneumatic systems, lube 
oil and fuel systems, and fluid power systems.
    (2) Nonmetallic flexible hose may be used in vital fresh and salt 
water systems at a maximum service pressure of 150 psi. Nonmetallic 
flexible hose may be used in lengths not exceeding 30 inches where 
flexibility is required subject to the limitations of paragraphs (a) (1) 
through (6) of this section. Nonmetallic flexible hose may be used for 
plastic pipe in duplicate installations in accordance with paragraph (b) 
of this section.
    (3) Nonmetallic flexible hose may be used for plastic pipe in 
nonvital fresh and salt water systems and nonvital pneumatic systems 
subject to the limitations of paragraphs (a) (1) through (6) of this 
section. Unreinforced hoses are limited to a maximum service pressure of 
50 psi, reinforced hoses are limited to a maximum service pressure of 
150 psi.
    (4) Nonmetallic flexible hose may be used in lube oil, fuel oil and 
fluid power systems only where flexibility is required and in lengths 
not exceeding 30 inches.
    (5) Nonmetallic flexible hose must be complete with factory-
assembled end fittings requiring no further adjustment of the fittings 
on the hose, except that field attachable type fittings may be used. 
Hose end fittings must comply with SAE J-1475. Field attachable fittings 
must be installed following the manufacturer's recommended practice. If 
special equipment is required, such as crimping machines, it must be of 
the type and design specified by the manufacturer. A hydrostatic test of 
each hose assembly must be conducted in accordance with Sec. 56.97-5 of 
this part.
    (d) Plastic valves, fittings, and flanges may be used in systems 
employing plastic pipe. Such valves, fittings, and flanges shall be 
designed, fabricated, tested, and installed so as to satisfy the intent 
of the requirements for plastic pipe contained in this section.
    (e) If it is desired to use nonmetallic materials other than those 
specified in this section, a request furnishing the chemical and 
physical properties of the material shall be submitted to the Commandant 
for consideration.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 72-104R, 37 FR 14234, July 18, 1972; CGD 73-
254, 40 FR 40165, Sept. 2, 1975; CGD 77-140, 54 FR 40613, Oct. 2, 1989; 
CGD 88-032, 56 FR 35822, July 29, 1991; CGD 83-043, 60 FR 24775, May 10, 
1995; CGD 95-072, 60 FR 50462, Sept. 29, 1995; CGD 96-041, 61 FR 50728, 
Sept. 27, 1996]

[[Page 216]]



            Subpart 56.65--Fabrication, Assembly and Erection



Sec. 56.65-1   General (replaces 127 through 135.4).

    (a) The requirements for fabrication, assembly and erection in 
subparts 56.70 through 56.90 shall apply in lieu of 127 through 135.4 of 
ANSI-B31.1. Those paragraphs reproduced are so noted.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970]



                         Subpart 56.70--Welding



Sec. 56.70-1  General.

    (a) The following generally applies to all types of welding, such as 
stud welding, casting repair welding and all processes of fabrication 
welding. Where the detailed requirements are not appropriate to a 
particular process, alternatives must be approved by the Marine Safety 
Center.

[CGD 77-140, 54 FR 40614, Oct. 2, 1989]



Sec. 56.70-3   Limitations.

    Backing rings. Backing strips used at longitudinal welded joints 
must be removed.

[CGD 73-254, 40 FR 40165, Sept. 2, 1975]



Sec. 56.70-5   Material.

    (a) Filler metal. All filler metal, including consummable insert 
material, must comply with the requirements of section IX, ASME Boiler 
and Pressure Vessel Code and Sec. 57.02-4 of this subchapter.
    (b) Backing rings. When metallic backing rings are used they shall 
be made from material of weldable quality compatible with the base 
metal, whether subsequently removed or not. When nonmetallic backing 
rings are used they shall be of material which does not deleteriously 
affect either base or weld metal, and shall be removed after welding is 
completed. Backing rings may be of the consumable insert type, removable 
ceramic type, of solid or split band type. A ferrous backing ring which 
becomes a permanent part of the weld shall not exceed 0.05 percent 
sulphur. If two abutting surfaces are to be welded to a third member 
used as a backing ring and one or two of the three members are ferritic 
and the other member or members are austenitic, the satisfactory use of 
such materials shall be determined by procedure qualifications.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40165, Sept. 2, 1975]



Sec. 56.70-10  Preparation (modifies 127.3).

    (a) Butt welds (reproduces 127.3.1)--(1) End preparation. (i) Oxygen 
or arc cutting is acceptable only if the cut is reasonably smooth and 
true, and all slag is cleaned from the flame cut surfaces. Discoloration 
which may remain on the flame cut surface is not considered to be 
detrimental oxidation.
    (ii) Butt-welding end preparation dimensions contained in ANSI-
B16.25 or any other end preparation which meets the procedure 
qualification requirements are acceptable.
    (iii) If piping component ends are bored, such boring shall not 
result in the finished wall thickness after welding being less than the 
minimum design thickness. Where necessary, weld metal of the appropriate 
analysis may be deposited on the inside or outside of the piping 
component to provide sufficient material for machining to insure 
satisfactory fitting of rings.
    (iv) If the piping component ends are upset they may be bored to 
allow for a completely recessed backing ring, provided the remaining net 
thickness of the finished ends is not less than the minimum design 
thickness.
    (2) Cleaning. Surfaces for welding shall be clean and shall be free 
from paint, oil, rust, scale, or other material which is detrimental to 
welding.
    (3) Alignment. The inside diameters of piping components to be 
joined must be aligned as accurately as practicable within existing 
commercial tolerances on diameters, wall thicknesses, and out of 
roundness. Alignment must be preserved during welding. Where ends are to 
be joined and the internal misalignment exceeds \1/16\-inch, it is 
preferred that the component with the wall extending internally be 
internally trimmed (see Fig. 127.3.1) so that adjoining internal 
surfaces are approximately flush. However, this trimming must not reduce 
a piping component

[[Page 217]]

wall thickness below the minimum design thickness and the change in the 
contour may not exceed 30 deg..
    (4) Spacing. The root opening of the joint shall be as given in the 
procedure specification.
    (b) Fillet welds (modifies 127.3.2). In making fillet welds, the 
weld metal must be deposited in such a way as to obtain adequate 
penetration into the base metal at the root of the weld. Piping 
components which are to be joined utilizing fillet welds must be 
prepared in accordance with applicable provisions and requirements of 
this section. For typical details, see Figures 127.4.4A and 127.4.4C of 
ANSI B31.1 and Figure 56.30-10(b) of this part. See Sec. 56.30-5(d) of 
this part for additional requirements.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CGD 77-
140, 54 FR 40614, Oct. 2, 1989]



Sec. 56.70-15  Procedure.

    (a) General. (1) Qualification of the welding procedures to be used, 
and of the performance of welders and operators, is required, and shall 
comply with the requirements of part 57 of this subchapter.
    (2) No welding shall be done if there is direct impingement of rain, 
snow, sleet, or high wind on the piping component weldment.
    (3) Sections of pipe shall be welded insofar as possible in the 
fabricating shop. Prior to welding Class I piping or low temperature 
piping, the fabricator shall request a marine inspector to visit his 
plant to examine his fabricating equipment and to witness the 
qualification tests required by part 57 of this subchapter. One test 
specimen shall be prepared for each process and welding position to be 
employed in the fabrication.
    (b) Girth butt welds. (1) (Reproduces 127.4.2(a)). Girth butt welds 
must be complete penetration welds and may be made with a single vee, 
double vee, or other suitable type of groove, with or without backing 
rings or consummable inserts.''
    (2) Girth butt welds in Class I, I-L, and II-L piping systems shall 
be double welded butt joints or equivalent single welded butt joints for 
pipe diameters exceeding three-fourth inch nominal pipe size. The use of 
a single welded butt joint employing a backing ring (note restrictions 
in paragraph (b)(3)(iv) of this section) on the inside of the pipe is an 
acceptable equivalent for Class I and Class II-L applications, but not 
permitted for Class I-L applications. Single welded butt joints 
employing either an inert gas for first pass backup or a consumable 
insert ring may be considered the equivalent of a double welded butt 
joint for all classes of piping and is preferable for Class I-L and II-L 
systems where double butt welds cannot be used. Appropriate welding 
procedure qualification tests shall be conducted as specified in part 57 
of this subchapter. A first pass inert gas backup is intended to mean 
that the inside of the pipe is purged with inert gas and that the root 
is welded with the inert gas metal arc (mig) or inert gas tungsten arc 
(tig) processes. Classes I, I-L, and II-L piping are required to have 
the inside of the pipe machined for good fit up if the misalignment 
exceeds that specified in Sec. 56.70-10(a)(3). In the case of Class II 
piping the machining of the inside of the pipe may be omitted. For 
single welded joints, where possible, the inside of the joint shall be 
examined visually to assure full penetration. Radiographic examination 
of at least 20 percent of single welded joints to check for penetration 
is required for all Class I and Class I-L systems regardless of size 
following the requirements of Sec. 56.95-10. Ultrasonic testing may be 
utilized in lieu of radiographic examination if the procedures are 
approved.
    (3) For Class II piping, the type of joints shall be similar to 
Class I piping, with the following exceptions:
    (i) Single-welded butt joints may be employed without the use of 
backing rings in all sizes provided that the weld is chipped or ground 
flush on the root side of the weld.
    (ii) For services such as vents, overflows, and gravity drains, the 
backing ring may be eliminated and the root of the weld need not be 
ground.
    (iii) Square-groove welds without edge preparation may be employed 
for butt joints in vents, overflows, and gravity drains where the pipe 
wall

[[Page 218]]

thickness does not exceed three-sixteenth inch.
    (iv) The crimped or forged backing ring with continuous projection 
around the outside of the ring is acceptable only for Class II piping. 
The projection must be completely fused.
    (4) Tack welds which become part of the finished weld, shall be made 
by a qualified welder. Tack welds made by an unqualified welder shall be 
removed. Tack welds which are not removed shall be made with an 
electrode which is the same as or equivalent to the electrode to be used 
for the first pass. Their stopping and starting ends must be properly 
prepared by grinding or other suitable means so that they may be 
satisfactorily incorporated into the final weld. Tack welds which have 
cracked shall be removed.
    (5) (Reproduces 127.2(c)). When components of different outside 
diameters are welded together, the weld joint must be filled to the 
outside surface of the component having the larger diameter. There must 
be a gradual transition, not exceeding a slope of 1:3, in the weld 
between the two surfaces. To avoid unnecessary weld deposit, the outside 
surface of the component having the larger diameter must be tapered at 
an angle not to exceed thirty degrees with the axis of the pipe. (See 
Fig. 127.4.2.)
    (6) (Modifies 127.4.2(d)). As-welded surfaces are permitted, 
however, the surface of welds must be sufficiently free from coarse 
ripple, grooves, overlaps, abrupt ridges and valleys to meet the 
following:
    (i) The surface condition of the finished welds must be suitable for 
the proper interpretation of radiographic and other nondestructive 
examinations when nondestructive examinations are required by 
Sec. 56.95-10. In those cases where there is a question regarding the 
surface condition on the interpretation of a radiographic film, the film 
must be compared to the actual weld surface for interpretation and 
determination of acceptability.
    (ii) Reinforcements are permitted in accordance with Table 56.70-15.
    (iii) Undercuts must not exceed \1/32\-inch and must not encroach on 
the minimum required section thickness.
    (iv) If the surface of the weld requires grinding to meet the above 
criteria, care must be taken to avoid reducing the weld or base material 
below the minimum required thickness.
    (7) The type and extent of examination required for girth butt welds 
is specified in Sec. 56.95-10.
    (8) Sections of welds that are shown by radiography or other 
examination to have any of the following type of imperfections shall be 
judged unacceptable and shall be repaired as provided in paragraph (f) 
of this section:
    (i) Any type of crack or zone of incomplete fusion or penetration.
    (ii) Any slag inclusion or porosity greater in extent than those 
specified as acceptable set forth in PW-51 of section I of the ASME 
Code.
    (iii) Undercuts in the external surfaces of butt welds which are 
more than \1/32\-inch deep.
    (iv) Concavity on the root side of full penetration girth butt welds 
where the resulting weld thickness is less than the minimum pipe wall 
thickness required by this subchapter. Weld reinforcement up to a 
maximum of \1/32\-inch thickness may be considered as pipe wall 
thickness in such cases.
    (c) Longitudinal butt welds. Longitudinal butt welds in piping 
components not made in accordance with the standards and specifications 
listed in 56.60-1 (a) and (b) must meet the requirements of paragraph 
104.7 of ANSI-B31.1 and may be examined nondestructively by an 
acceptable method. Imperfections shall not exceed the limits established 
for girth butt welds except that no undercutting shall be permitted in 
longitudinal butt welds. See also Sec. 56.60-2(b).
    (d) Fillet welds. (1) Fillet welds may vary from convex to concave. 
The size of a fillet weld is determined as shown in Figure 127.4.4A in 
ANSI B31.1. Fillet weld details for socket-welding components must meet 
Sec. 56.30-5(c) of this part. Fillet weld details for flanges must meet 
Sec. 56.30-10(c) of this part. Fillet weld details for flanges must meet 
Sec. 56.30-10 of this part.
    (2) The limitations on cracks and undercutting set forth in 
paragraph (b)(8) of this section for girth welds are also applicable to 
fillet welds.

[[Page 219]]

    (3) Class I piping not exceeding 3 inches nominal pipe size and not 
subject to full radiography by Sec. 56.95-10 of this part may be joined 
by sleeves fitted over pipe ends or by socket type joints. Where full 
radiography is required, only butt type joints may be used. The inside 
diameter of the sleeve must not exceed the outside diameter of the pipe 
or tube by more than 0.080 inch. Fit between socket and pipe must 
conform to applicable standards for socket weld fittings. Depth of 
insertion of pipe or tube within the socket or sleeve must not be less 
than three-eighths inch. The fillet weld must be deposited in a minimum 
of two passes, unless specifically approved otherwise in a special 
procedure qualification. Requirements for joints employing socket weld 
and slip-on flanges are in Sec. 56.30-10 of this part.
    (4) Sleeve and socket type joints may be used in Class II piping 
systems without restriction as to size of pipe or tubing joined. 
Applicable standards must be followed on fit. The fillet welds must be 
deposited in a minimum of two passes, unless specifically approved 
otherwise in a special procedure qualification. Requirements for joints 
employing socket weld and slip-on flanges are in Sec. 56.30-10 of this 
part.
    (e) Seal welds (reproduces 127.4.5). (1) Where seal welding of 
threaded joints is performed, threads shall be entirely covered by the 
seal weld. Seal welding shall be done by qualified welders.
    (2) The limitation on cracks and undercutting set forth in 
Sec. 56.70-15(b)(8) for girth welds are also applicable to seal welds.
    (f) Weld defect repairs (reproduces 127.4.11). (1) All defects in 
welds requiring repair must be removed by a flame or arc-gouging, 
grinding, chipping, or machining. Repair welds must be made in 
accordance with the same procedures used for original welds, or by 
another welding process if it is a part of a qualified procedure, 
recognizing that the cavity to be repaired may differ in contour and 
dimensions from the original joint. The types, extent, and method of 
examination and limits of imperfections of repair welds shall be the 
same as for the original weld.
    (2) Preheating may be required for flame-gouging or arc-gouging 
certain alloy materials of the air hardening type in order to prevent 
surface checking or cracking adjacent to the flame or arc-gouged 
surface.
    (g) Welded branch connections (reproduces 127.4.8). (1) Figure 
127.4.8A, Figure 127.4.8B, and Figure 127.4.8C of ANSI-B31.1 show 
typical details of branch connections with and without added 
reinforcement. However, no attempt has been made to show all acceptable 
types of construction and the fact that a certain type of construction 
is illustrated does not indicate that it is recommended over other types 
not illustrated. See also Figure 56.70-15(g) for additional pipe 
connections.
    (2) Figure 127.4.8D of ANSI-B31.1 shows basic types of weld 
attachments used in the fabrication of branch connections. The location 
and minimum size of these attachment welds shall conform to the 
requirements of this paragraph. Weld sizes shall be calculated in 
accordance with 104.3.1 of ANSI-B31.1, but shall not be less than the 
sizes shown in Figure 127.4.8D and F of ANSI-B31.1.
    (3) The notations and symbols used in this paragraph and in Figure 
127.4.8D and F of ANSI-B31.1 are as follows:

[[Page 220]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.027


    Figure 56.70-15(g).--Acceptable types of welded pipe connections.
tn=nominal thickness of branch wall less corrosion allowance, 
inches.
tc=the smaller of \1/4\ inch or 0.7tn.
te=nominal thickness of reinforcing element (ring or saddle), 
inches (te=0 if there is no added reinforcement).
tmin=the smaller of tn or te.
tw=dimension of partial penetration weld, inches.

    (4) Branch connections (including specially made integrally 
reinforced branch connection fittings) which abut the outside surface of 
the run wall, or which are inserted through an opening cut in the run 
wall, shall have opening and branch contour to provide a good fit and 
shall be attached by means of full penetration groove welds except as 
otherwise permitted in paragraph (g)(7) of this section. The full 
penetration groove welds shall be finished with cover fillet welds 
having a minimum throat dimension not less than tc. The limitation 
as to imperfection of these groove welds shall be as set forth in 
127.4.2(e) of ANSI-B31.1 for girth welds.
    (5) In branch connections having reinforcement pads or saddles, the 
reinforcement shall be attached by welds at the outer edge and at the 
branch periphery as follows:
    (i) If the weld joining the added reinforcement to the branch is a 
full penetration groove weld, it shall be finished with a cover fillet 
weld having a minimum throat dimension not less than tc the weld at 
the outer edge, joining the added reinforcement to the run, shall be a 
fillet weld with a minimum throat dimension of 0.5 te.
    (ii) If the weld joining the added reinforcement to the branch is a 
fillet weld, the throat dimension shall not be less than 0.7 tmin. 
The weld at the outer edge joining the outer reinforcement to the run 
shall also be a fillet weld with a minimum throat dimension of 0.5 
te.
    (6) When rings or saddles are used, a vent hole shall be provided 
(at the side and not at the crotch) in the ring or saddle to reveal 
leakage in the weld between branch and main run and to provide venting 
during welding and heat treating operations. Rings or saddles may be 
made in more than one piece if the joints between the pieces have 
strength equivalent to ring or saddle parent metal and if each piece is 
provided with a vent hole. A good fit shall be provided between 
reinforcing rings or saddles and the parts to which they are attached.
    (7) Branch connections 2 in. NPS and smaller that do not require 
reinforcement may be constructed as shown in Fig. 127.4.8F of ANSI-
B31.1. This construction is limited to use in Class I and II piping 
systems at a maximum design temperature of 750 deg. F. or a maximum 
pressure of 1025 psi.
    (h) Heat treatment. Heat treatment for welds shall be in accordance 
with subpart 56.85.

[[Page 221]]



    Table 56.70-15 Reinforcement of Girth and Longitudinal Butt Welds   
------------------------------------------------------------------------
                                      Maximum thickness (in inches) of  
                                    reinforcement for design temperature
                                  --------------------------------------
  Thickness (in inches) of base                                0  deg.F 
              metal                  Below 0                  and above 
                                     deg.F or   350 deg. to    but less 
                                    above 750    750  deg.F    than 350 
                                      deg.F                     deg.F   
------------------------------------------------------------------------
Up to \1/8\, inclusive...........       \1/16\       \3/32\       \3/16\
Over \1/8\ to \3/16\, inclusive..       \1/16\        \1/8\       \3/16\
Over \3/16\ to \1/2\, inclusive..       \1/16\       \5/32\       \3/16\
Over \1/2\ to 1, inclusive.......       \3/32\       \3/16\       \3/16\
Over 1 to 2, inclusive...........        \1/8\        \1/4\        \1/4\
Over 2...........................       \5/32\          (1)          (1)
------------------------------------------------------------------------
\1\ The greater of \1/4\ in. or \1/8\ times the width of the weld in    
  inches.                                                               
                                                                        
Notes: 1. For double welded butt joints, this limitation on             
  reinforcement given above applies separately to both inside and       
  outside surfaces of the joint.                                        
2. For single welded butt joints, the reinforcement limits given above  
  apply to the outside surface of the joint only.                       
3. The thickness of weld reinforcement is based on the thickness of the 
  thinner of the materials being joined.                                
4. The weld reinforcement thicknesses must be determined for the higher 
  of the abutting surfaces involved.                                    
5. For boiler external piping use the column titled ``Below 0 deg. F. or
  above 750 deg. F.'' for weld reinforcement thicknesses.               

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9978, June 17, 1970; CGD 73-254, 40 FR 40165, Sept. 2, 1975; CGD 77-
140, 54 FR 40614, Oct. 2, 1989; 55 FR 39969, Oct. 1, 1990; CGD 95-012, 
60 FR 48050, Sept. 18, 1995]



Sec. 56.70-20   Qualification, general.

    (a) Qualification of the welding procedures to be used, and of the 
performance of welders and welding operators, is required, and shall 
comply with the requirements of the ASME Boiler and Pressure Vessel Code 
(section IX) except as modified by part 57 of this subchapter.
    (b) Each butt-welded joint of Class I of Class I-L piping shall be 
marked with the welder's identification symbol. Dies shall not be used 
to mark the pipe where the pressure exceeds 600 pounds per square inch 
or the temperature exceeds 750 deg. F. or in Class I-L systems.



                         Subpart 56.75--Brazing



Sec. 56.75-5  Filler metal.

    (a) The filler metal used in brazing must be a nonferrous metal or 
alloy having a melting point above 1,000  deg.F. and below that of the 
metal being joined. The filler metal must meet and flow freely within 
the desired temperature range and, in conjunction with a suitable flux 
or controlled atmosphere, must wet and adhere to the surfaces to be 
joined. Prior to using a particular brazing material in a piping system, 
the requirements of Sec. 56.60-20 of this part should be considered.
    (b) The brazing material used shall have a shearing strength of at 
least 10,000 pounds per square inch. The maximum allowable working 
pressure for brazing piping shall be determined by this part.
    (c) (Reproduces 128.1.2.) Fluxes that are fluid and chemically 
active at the brazing temperature shall be used when necessary to 
prevent oxidation of the filler metal and the surfaces to be joined and 
to promote free flowing of the filler metal.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40615, Oct. 2, 1989]



Sec. 56.75-10   Joint clearance (reproduces 128.2.2).

    (a) The clearance between surfaces to be joined shall be no larger 
than is necessary to insure complete capillary distribution of the 
filler metal; between 0.002-inch minimum and 0.006-inch maximum.



Sec. 56.75-15   Heating (reproduces 128.2.3).

    (a) The joint shall be brought to brazing temperature in as short a 
time as possible to minimize oxidation.



Sec. 56.75-20   Brazing qualification.

    (a) The qualification of the performance of brazers and brazing 
operators, shall be in accordance with the requirements of part C, 
section IX of the

[[Page 222]]

ASME Code and part 57 of this subchapter.
    (b) Manufacturers shall perform those tests required by paragraph 
(a) of this section prior to performing production brazing.



Sec. 56.75-25   Detail requirements.

    (a) Pipe may be fabricated by brazing when the temperature to which 
such connections may be subjected does not exceed 425 deg. F. (For 
exception refer to Sec. 56.30-30(b)(1).)
    (b) (Reproduces 128.2.1.) The surfaces to be brazed shall be clean 
and free from grease, oxides, paint, scale, and dirt of any kind. Any 
suitable chemical or mechanical cleaning method may be used to provide a 
clean wettable surface for brazing.
    (c) After the parts to be joined have been thoroughly cleaned the 
edges to be brazed shall be given an even coating of flux prior to 
heating the joint as a protection against oxidation.



Sec. 56.75-30   Pipe joining details.

    (a) Silver brazing. (1) Circumferential pipe joints may be either of 
the socket or butt type. When butt joints are employed the edges to be 
joined shall be cut or machined square and the edges shall be held 
closely together to insure a satisfactory joint.
    (b) Copper-alloy brazing. (1) Copper-alloy brazing may be employed 
to join pipe, valves, and fittings. Circumferential joints may be either 
of the butt or socket type. Where butt joints are employed, the included 
angle shall be not less than 90 deg. where the wall thickness is three-
sixteenths of an inch or greater. The annular clearance of socket joints 
shall be held to small clearances which experience indicates is 
satisfactory for the brazing alloy to be employed, method of heating, 
and material to be joined. The annular clearance shall be shown on 
drawings submitted for approval of socket joints.
    (2) Copper pipe fabricated with longitudinal joints for pressures 
not exceeding that permitted by the regulations in this subchapter may 
have butt, lapped, or scarfed joints. If of the latter type, the kerf of 
the material shall be not less than 60 deg..
    (c) Brazing, general. (1) Heat shall be applied evenly and uniformly 
to all parts of the joint in order to prevent local overheating.
    (2) The members to be joined shall be held firmly in place until the 
brazing alloy has set so as to prevent any strain on the joint until the 
brazing alloy has thoroughly solidified. The brazing shall be done by 
placing the flux and brazing material on one side of the joint and 
applying heat until the brazing material flows entirely through the lap 
and shows uniformly along the seam on the other side of the joint. 
Sufficient flux shall be used to cause the brazing material to appear 
promptly after reaching the brazing temperature.



                   Subpart 56.80--Bending and Forming



Sec. 56.80-5   Bending.

    Pipe may be bent by any hot or cold method and to any radius which 
will result in a bend surface free of cracks, as determined by a method 
of inspection specified in the design, and substantially free of 
buckles. Such bends shall meet the design requirements of 102.4.5 and 
104.2.1 of ANSI-B31.1. This shall not prohibit the use of bends designed 
as creased or corrugated. If doubt exists as to the wall thickness being 
adequate, Class I piping having diameters exceeding 4 inches shall be 
nondestructively examined by the use of ultrasonics or other acceptable 
method. Alternatively, the pipe may be drilled, gaged, and fitted with a 
screwed plug extending outside the pipe covering. The nondestructive 
method shall be employed where the design temperature exceeds 750 deg. 
F. Prior to the use of nondestructive method of examination by the above 
procedure, it shall be demonstrated by the user, in the presence of a 
marine inspector on specimens similar to those to be examined, that 
consistent results, having an accuracy of plus or minus 3 percent, can 
be obtained.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970]



Sec. 56.80-10   Forming (reproduces 129.2).

    (a) Piping components may be formed (swaging, lapping, or upsetting

[[Page 223]]

of pipe ends, extrusion of necks, etc.) by any suitable hot or cold 
working method, providing such processes result in formed surfaces which 
are uniform and free of cracks or other defects, as determined by 
methods of inspection specified in the design.



Sec. 56.80-15   Heat treatment of bends and formed components.

    (a) (Reproduces 129.3.1.) Carbon steel piping which has been heated 
to at least 1,650 deg. F. for bending or other forming operations shall 
require no subsequent heat treatment.
    (b) Ferritic alloy steel piping which has been heated for bending or 
other forming operations shall receive a stress relieving treatment, a 
full anneal, or a normalize and temper treatment, as specified by the 
design specification before welding.
    (c) (Reproduces 129.3.3.) Cold bending and forming of carbon steel 
having a wall thickness of three-fourths of an inch and heavier, and all 
ferritic alloy pipe in nominal pipe sizes of 4 inches and larger, or \1/
2\-inch wall thickness or heavier, shall require a stress relieving 
treatment.
    (d) (Reproduces 129.3.4.) Cold bending of carbon and ferritic alloy 
steel pipe in sizes and wall thicknesses less than specified in 129.3.3 
of ANSI-B31.1 may be used without a postheat treatment.
    (e) (Reproduces 129.3.5.) For other materials the heat treatment of 
bends and formed components shall be such as to insure pipe properties 
that are consistent with the original pipe specification.
    (f) All scale shall be removed from heat treated pipe prior to 
installation.
    (g) (Reproduces 129.3.6.) Austenitic stainless steel pipe that has 
been heated for bending or other forming may be used in the ``as-bent'' 
condition unless the design specification requires post bending heat 
treatment.

[CGFR 68-62, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970; CGD 73-254, 40 FR 40166, Sept. 2, 1975]



                 Subpart 56.85--Heat Treatment of Welds



Sec. 56.85-5   Heating and cooling method (reproduces 131.1).

    (a) Heat treatment may be accomplished by a suitable heating method 
which will provide the desired heating and cooling rates, the required 
metal temperature, metal temperature uniformity, and temperature 
control.



Sec. 56.85-10   Preheating.

    (a) The minimum preheat temperatures listed in Table 56.85-10 for P-
number materials groupings are mandatory minimum pre-heat temperatures. 
Preheat is required for Class I, I-L, I-N, II-N and II-L piping when the 
ambient temperature is below 50 deg. F.
    (b) (Modifies 131.2.2.) When welding dissimilar materials the 
minimum preheat temperature may not be lower than the highest 
temperature listed in Table 56.85-10 for any of the materials to be 
welded or the temperature established in the qualified welding 
procedure.
    (c) (Reproduces 131.2.3.) The preheat temperature shall be checked 
by use of temperature-indicating crayons, thermocouples, pyrometers, or 
other suitable methods to assure that the required preheat temperature 
is obtained prior to and uniformly maintained during the welding 
operation.

                                                 Table 56.85-10--Preheat and Postheat Treatment of Welds                                                
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                    Preheat required                                  Post heat treatment requirement (1)(2)            
                               -------------------------------------------------------------------------------------------------------------------------
                                                                                                                                        Time cycle      
                                                                                                                                 -----------------------
       ASME Sec IX Nos.                                 Minimum        Minimum wall and                                                         Minimum 
                                   Minimum wall       temperature            other          Temperature (7)(8)(9)(10)(11)(12)(     Hour per      time   
                                  (3)(4) (inch)     (5)(6)( deg.F.)    (3)(4)(17)(inch)                deg.F.)(inch)                inch of     within  
                                                                                                                                     wall        range  
                                                                                                                                    (3)(4)      (hour)  
--------------------------------------------------------------------------------------------------------------------------------------------------------
P-1(16).......................  All..............  50 (for .30 C.     Over \3/4\ in.....  1,100 to 1,200 (minimum) (maximum)....           1           1
                                                    maximum or less)                                                                                    
                                                    (13).                                                                                               

[[Page 224]]

                                                                                                                                                        
P-1(16).......................  All..............  175 (for over .30  ......do..........  ......do..............................           1           1
                                                    C.) (13) and                                                                                        
                                                    wall thickness                                                                                      
                                                    over 1 in.                                                                                          
P-3(15).......................  All walls........  175..............  Over \1/2\ in.....  1,200 to 1,350 (minimum) (maximum)....           1           1
P-4(15).......................  Up to \3/4\ in     300..............  Over \1/2\ in or    1,330 to 1,400 (minimum) (maximum)....           1           1
                                 inclusive.                            over 4 in nom.                                                                   
                                                                       size or.                                                                         
                                Over \3/4\ in....  400..............  Over .15 C.                                                                       
                                                                       maximum.                                                                         
P-5(15) (less than 5 cr.).....  Up to \3/4\ in     300..............  Over \1/2\ in or    1,300 to 1,425 (minimum) (maximum)....           1           1
                                 inclusive.                            over 4 in. nom.                                                                  
                                                                       size or.                                                                         
                                Over \3/4\ in....  400..............  Over 0.15 C.                                                                      
                                                                       maximum.                                                                         
P-5(15) (5 cr. and higher)....  Up to \3/4\        300..............  All walls.........  ......do..............................           1           2
                                 inclusive.                                                                                                             
                                Over \3/4\ in....  400..............  Over 0.15 C.                                                                      
                                                                       maximum.                                                                         
P-6...........................  All walls........  300 (14).........  All walls.........  1,400 to 1,500 (minimum) (maximum)....           1           2
P-8...........................  ......do.........  None required....  ......do..........  None required.........................                        
--------------------------------------------------------------------------------------------------------------------------------------------------------

    For P-7, P-9A, P-9B, P-10C and other materials not listed the 
Preheat and Postheat Treatment is to be in accordance with the qualified 
procedure.
    Notes Applicable To Table 56.85-10:
    (1) Not applicable to dissimilar metal welds.
    (2) When postheat treatment by annealing or normalizing is used, the 
postheat treatment temperatures must be in accordance with the qualified 
welding procedure.
    (3) Wall thickness of a butt weld is defined as the thicker of the 
two abutting ends after end preparation including I.D. machining.
    (4) The thickness of socket, fillet, and seal welds is defined as 
the throat thicknesses for pressure and nonpressure retaining welds.
    (5) Preheat temperatures must be checked by use of temperature 
indicating crayons, thermocouple pyrometers, or other suitable method.
    (6) For inert gas tungsten arc root pass welding lower preheat in 
accordance with the qualified procedure may be used.
    (7) The maximum postheat treatment temperature listed for each P 
number is a recommended maximum temperature.
    (8) Postheat treatment temperatures must be checked by use of 
thermocouple pyrometers or other suitable means.
    (9) Heating rate for furnace, gas, electric resistance, and other 
surface heating methods must not exceed: (i) 600 deg. F per hour for 
thicknesses 2 inches and under.
    (ii) 600 deg. F per hour divided by \1/2\ the thickness in inches 
for thickness over 2 inches.
    (10) Heating route for induction heating must not exceed:
    (i) 600 deg. F per hour for thickness less than 1\1/2\ inches (60 
and 400 cycles).
    (ii) 500 deg. F per hour when using 60 cycles and 400 deg. F per 
hour when using 400 cycles for thicknesses 1\1/2\ inches and over.
    (11) When local heating is used, the weld must be allowed to cool 
slowly from the postheat treatment temperature. A suggested method of 
retarding cooling is to wrap the weld with asbestos and allow to cool in 
still air. When furnace cooling is used, the pipe sections must be 
cooled in the furnace to 1000 deg. F and may then be cooled further in 
still air.
    (12) Local postheat treatment of butt welded joints must be 
performed on a circumferential band of the pipe. The minimum width of 
this band, centered on the weld, must be the width of the weld plus 2 
inches.
    Local postheat treatment of welded branch connections must be 
performed by heating a circumferential band of the pipe to which the 
branch is welded. The width of the heated band must extend at least 1 
inch beyond the weld joining the branch.
    (13) 0.30 C. max applies to specified ladle analysis.
    (14) 600 deg.F maximum interpass temperature.
    (15) Welding on P-3, P-4, and P-5 with 3 Cr max. may be interrupted 
only if--

[[Page 225]]

    (i) At least \3/8\ inch thickness of weld is deposited or 25 percent 
of welding groove is filled, whichever is greater;
    (ii) The weld is allowed to cool slowly to room temperature; and
    (iii) The required preheat is resumed before welding is continued.
    (16) When attaching welding carbon steel non-pressure parts to steel 
pressure parts and the throat thickness of the fillet or partial or full 
penetration weld is \1/2\ in. or less, postheat treatment of the fillet 
weld is not required for Class I and II piping if preheat to a minimum 
temperature of 175 deg. F is applied when the thickness of the pressure 
part exceeds \3/4\ in.
    (17) For Class I-L and II-L piping systems, relief from postweld 
heat treatment may not be dependent upon wall thickness. See also 
Secs. 56.50-105(a)(3) and 56.50-105(b)(3) of this chapter.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 72-104R, 37 FR 14234, July 18, 1972; CGD 72-
206R, 38 FR 17229, June 29, 1973; CGD 73-254, 40 FR 40166, Sept. 2, 
1975; CGD 77-140, 54 FR 40615, Oct. 2, 1989]



Sec. 56.85-15   Postheat treatment.

    (a) Where pressure retaining components having different thicknesses 
are welded together as is often the case when making branch connections, 
the preheat and postheat treatment requirements of Table 56.85-10 apply 
to the thicker of the components being joined. Postweld heat treatment 
is required for Classes I, I-L, II-L, and systems. It is not required 
for Class II piping. Refer to Sec. 56.50-105(a)(3) for exceptions in 
Classes I-L and II-L systems and to paragraph (b) of this section for 
Class I systems.
    (b) All buttwelded joints in Class I piping shall be postweld heated 
as required by Table 56.85-10. The following exceptions are permitted:
    (1) High pressure salt water piping systems used in tank cleaning 
operations; and,
    (2) Gas supply piping of carbon or carbon molybdenum steel used in 
gas turbines.
    (c) All complicated connections including manifolds shall be stress-
relieved in a furnace as a whole as required by Table 56.85-10 before 
being taken aboard ship for installation.
    (d) (Reproduces 131.3.2.) The postheat treatment method selected for 
parts of an assembly shall not adversely affect other components. 
Heating a fabricated assembly as a complete unit is usually desirable; 
however, the size or shape of the unit or the adverse effect of a 
desired heat treatment on one or more components where dissimilar 
materials are involved, may dictate alternative procedures such as 
heating a section of the assembly before the attachment of others, or 
local circumferential band heating of welded joints in accordance with 
Sec. 56.85-15(j)(3) and note (12) of Table 56.85-10.
    (e) (Reproduces 131.3.3.) Postheat treatment of welded joints 
between dissimilar metals having different postheat requirements shall 
be that established in the qualified welding procedure.
    (f)-(h) [Reserved]
    (i) (Reproduces 131.3.4.) For those materials listed under P-No. 1, 
when the wall thickness of the thicker of the two abutting ends, after 
end preparation, is less than three-fourths inch, the weld need not be 
postheat treated. In all cases, where the nominal wall thickness is \3/
4\ in. or less, postheat treatment is not required.
    (j) (1)-(2) [Reserved]
    (3) In local postheat treatment the entire band must be brought up 
to uniform specified temperature over the complete circumference of the 
pipe section, with a gradual diminishing of the temperature outward from 
the edges of the band.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 72-206R, 38 
FR 17229, June 29, 1973; CGD 73-254, 40 FR 40167, Sept. 2, 1975]



                         Subpart 56.90--Assembly



Sec. 56.90-1   General.

    (a) The assembly of the various piping components, whether done in a 
shop or as field erection, shall be done so that the completely erected 
piping conforms with the requirements of the regulations in this 
subchapter and with the specified requirements of the engineering 
design.



Sec. 56.90-5   Bolting procedure.

    (a) All flanged joints shall be fitted up so that the gasket contact 
faces bear uniformly on the gasket and then

[[Page 226]]

shall be made up with relatively uniform bolt stress. Bolt loading and 
gasket compression need only be verified by touch and visual 
observation.
    (b) (Reproduces 135.2.2.) In bolting gasketed flanged joints, the 
gasket shall be properly compressed in accordance with the design 
principles applicable to the type of gasket used.
    (c) Steel to cast iron flanged joints shall be assembled with care 
to prevent damage to the cast iron flange in accordance with Sec. 56.25-
10.
    (d) (Reproduces 135.2.4.) All bolts shall be engaged so that there 
is visible evidence of complete threading through the nut or threaded 
attachment.



Sec. 56.90-10   Threaded piping (reproduces 135.4).

    (a) Any compound or lubricant used in threaded joints shall be 
suitable for the service conditions and shall not react unfavorably with 
either the service fluid or the piping materials.
    (b) Threaded joints which are to be seal welded shall be made up 
without any thread compound.
    (c) Backing off to permit alignment of pipe threaded joints shall 
not be permitted.



                        Subpart 56.95--Inspection



Sec. 56.95-1   General (replaces 136).

    (a) The provisions in this subpart shall apply to inspection in lieu 
of 136 of ANSI-B31.1.
    (b) Prior to initial operation, a piping installation shall be 
inspected to the extent necessary to assure compliance with the 
engineering design, and with the material, fabrication, assembly and 
test requirements of ANSI-B31.1, as modified by this subchapter. This 
inspection is the responsibility of the owner and may be performed by 
employees of the owner or of an engineering organization employed by the 
owner, together with the marine inspector.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9979, June 17, 1970]



Sec. 56.95-5   Rights of access of marine inspectors.

    Marine inspectors shall have rights of access to any place where 
work concerned with the piping is being performed. This includes 
manufacture, fabrication, assembly, erection, and testing of the piping 
or system components. Marine inspectors shall have access to review all 
certifications or records pertaining to the inspection requirements of 
Sec. 56.95-1, including certified qualifications for welders, welding 
operators, and welding procedures.



Sec. 56.95-10  Type and extent of examination required.

    (a) General. The types and extent of nondestructive examinations 
required for piping must be in accordance with this section and Table 
136.4 of ANSI-B31.1. In addition, a visual examination shall be made.
    (1) 100 percent radiography \1\ is required for all Class I, I-L and 
II-L piping equal to or greater than 4 inches nominal diameter or 0.375 
inches nominal wall thickness.
    (2) Nondestructive examination is required for all Class II piping 
equal to or greater than 18 inches nominal diameter regardless or wall 
thickness. Any test method acceptable to the Officer in Charge, Marine 
Inspection may be used.
    (3) Appropriate nondestructive examinations of other piping systems 
are required only when deemed necessary by the Officer in Charge, Marine 
Inspection. In such cases a method of testing satisfactory to the 
Officer in Charge, Marine Inspection must be selected from those 
described in this section.
    (b) Visual examination. Visual examination consists of observation 
by the marine inspector of whatever portions of a component or weld are 
exposed to such observation, either before, during, or after 
manufacture, fabrication, assembly or test. All welds, pipe and piping 
components shall be capable of complying with the limitations on 
imperfections specified in the product specification under which the 
pipe or component was purchased, or with the limitations on 
imperfections specified in Sec. 56.70-15(b) (7) and (8), and (c), as 
applicable.

[[Page 227]]

    (c) Nondestructive types of examinations--(1) 100 Percent 
radiography. Where 100 percent radiography1 is required for welds 
in piping, each weld in the piping shall be completely radiographed. If 
a butt weld is examined by radiography, for either random or 100 percent 
radiography, the method used shall be as follows:
---------------------------------------------------------------------------

    1Where for some reason, such as joint configuration, 
radiography is not applicable, another approved examination may be 
utilized.
---------------------------------------------------------------------------

    (i) X-ray or gamma ray method of radiography may be used. The 
selection of the method shall be dependent upon its adaptability to the 
work being radiographed. The procedure to be followed shall be as 
indicated in PW-51 of section I of the ASME Code.
    (ii) If a piping component or a weld other than a butt weld is 
radiographed, the method used shall be in accordance with UW-51 of 
section VIII of the ASME Code.
    (2) Random radiography. Where random radiography \1\ is required, 
one or more welds may be completely or partially radiographed. Random 
radiography is considered to be a desirable means of spot checking 
welder performance, particularly in field welding where conditions such 
as position, ambient temperatures, and cleanliness are not as readily 
controlled as in shop welding. It is to be employed whenever an Officer 
in Charge, Marine Inspection questions a pipe weld not otherwise 
required to be tested. The standards of acceptance are the same as for 
100 percent radiography.
    (3) Ultrasonic. Where 100 percent ultrasonic testing is specified, 
the entire surface of the weld being inspected shall be covered using 
extreme care and careful methods to be sure that a true representation 
of the actual conditions is obtained. The procedures to be used shall be 
submitted to the Commandant for approval.
    (4) Liquid penetrant. Where liquid penetrant examination is 
required, the entire surface of the weld being examined shall be 
covered. The examination shall be performed in accordance with appendix 
VIII to section VIII of the ASME Code. The following standards of 
acceptance shall be met:
    (i) All linear discontinuities and aligned penetrant indications 
revealed by the test shall be removed. Aligned penetrant indications are 
those in which the average of the center-to-center distances between any 
one indication and the two adjacent indications in any straight line is 
less than three-sixteenths inch. All other discontinuities revealed on 
the surface need not be removed unless the discontinuities are also 
revealed by radiography, in which case the pertinent radiographic 
specification shall apply.
    (5) Magnetic particle. Where magnetic particle testing is required, 
the entire surface of the weld being examined shall be covered. The 
testing shall be performed in accordance with appendix VI to section 
VIII of the ASME Code. The following standards of acceptance are 
required for welds. All linear discontinuities and aligned indications 
revealed by the test shall be removed. Aligned indications are those in 
which the average of the center-to-center distances between any one 
indication and the two adjacent indications in any straight line is less 
than three-sixteenths inch. All other revealed discontinuities need not 
be removed unless the discontinuities are also revealed by radiography, 
in which case the requirements of paragraph (c)(1) of this section shall 
be met.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 72-206R, 38 
FR 17229, June 29, 1973; CGD 78-108, 43 FR 46546, Oct. 10, 1978; CGD 77-
140, 54 FR 40615, Oct. 2, 1989]



                      Subpart 56.97--Pressure Tests



Sec. 56.97-1   General (replaces 137).

    (a) Scope. The requirements in this subpart apply to pressure tests 
of piping in lieu of 137 of ANSI-B31.1. Those paragraphs reproduced are 
so noted.
    (b) Leak tightness. It is mandatory that the design, fabrication and 
erection of piping constructed under the regulations in this subchapter 
demonstrate leak tightness. Except where otherwise permitted in this 
subpart, this requirement must be met by a hydrostatic leak test prior 
to initial operations. Where a hydrostatic test is not practicable, a 
pneumatic test (Sec. 56.97-35) or initial service leak test (Sec. 56.97-

[[Page 228]]

38) may be substituted if approved by the Commandant.
    (1) At no time during the hydrostatic test may any part of the 
piping system be subjected to a stress greater than 90 percent of its 
yield strength (0.2 percent offset) at test temperature.
    (2) Pneumatic tests may be used in lieu of the required hydrostatic 
test (except as permitted in paragraph (b)(3) of this section), only 
when--
    (i) Piping subassemblies or systems are so designed or supported 
that they cannot be safely filled with water;1 or
---------------------------------------------------------------------------

    1These tests may be made with the item being tested partially 
filled with water, if desired.
---------------------------------------------------------------------------

    (ii) Piping subassemblies or systems are to be used in services 
where traces of the testing medium cannot be tolerated and, whenever 
possible, the piping subassemblies or system have been previously 
hydrostatically tested to the pressure required in Sec. 56.97-30(e).
    (3) A pneumatic test at a pressure not to exceed 25 psig may be 
applied before a hydrostatic or a pneumatic test as a means of locating 
major leaks. The preliminary pneumatic test must be carried out in 
accordance with the requirements of Sec. 56.97-35.

    Note: Compressed gas is hazardous when used as a testing medium. It 
is, therefore, recommended that special precautions for protection of 
personnel be taken whenever gas under pressure is used as the test 
medium.

    (4) The hydrostatic test of the piping system, when conducted in 
accordance with the requirements of this part, is acceptable as the test 
for piping subassemblies and may also be used in lieu of any such test 
required by the material specification for material used in the piping 
subassembly or system provided the minimum test pressure required for 
the piping system is met, except where the installation would prevent 
performing any nondestructive examination required by the material 
specification to be performed subsequent to the hydrostatic or pneumatic 
test.

[CGD 73-254, 40 FR 40167, Sept. 2, 1975]



Sec. 56.97-5  Pressure testing of nonstandard piping system components.

    (a) All nonstandard piping system components such as welded valves 
and fittings, nonstandard fittings, manifolds, seacocks, and other 
appurtenances must be hydrostatically tested to twice the rated pressure 
stamped thereon, except that no component should be tested at a pressure 
causing stresses in excess of 90 percent of its yield strength.
    (b) Items for which an accepted standard appears in Table 56.60-1(b) 
need not be tested as described in paragraph (a) of this section, but 
need only meet the test required in the applicable standard.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGD 77-140, 54 FR 
40615, Oct. 2, 1989]



Sec. 56.97-25   Preparation for testing (Reproduces 137.3).

    (a) Exposure of joints. All joints including welds must be left 
uninsulated and exposed for examination during the test.
    (b) Addition of temporary supports. Piping systems designed for 
vapor or gas may be provided with additional temporary supports, if 
necessary, to support the weight of the test liquid.
    (c) Restraint or isolation of expansion joints. Expansion joints 
must be provided with temporary restraint, if required for the 
additional pressure load under test, or they must be isolated from the 
test.
    (d) Isolation of equipment not subjected to pressure test. Equipment 
that is not to be subjected to the pressure test must be either 
disconnected from the piping subassembly or system or isolated by a 
blank flange or similar means. Valves may be used if the valve with its 
closure is suitable for the proposed test pressure.
    (e) Treatment of flanged joints containing blinds. Flanged joints at 
which blinds are inserted to blank off other equipment during the test 
need not be tested.
    (f) Precautions against test medium expansion. If a pressure test is 
to be maintained for a period of time and the test medium in the system 
is subject to thermal expansion, precautions must

[[Page 229]]

be taken to avoid excessive pressure. A small relief valve set to 1\1/3\ 
times the test pressure is recommended during the pressure test.

[CGD 73-254, 40 FR 40167, Sept. 2, 1975]



Sec. 56.97-30   Hydrostatic tests (Reproduces 137.4).

    (a) Provision of air vents at high points. Vents must be provided at 
all high points of the piping subassembly or system in the position in 
which the test is to be conducted to purge air pockets while the 
component or system is filling.
    (b) Test medium and test temperature. (1) Water will be used for a 
hydrostatic leak test unless another medium is approved by the 
Commandant.
    (2) The temperature of the test medium will be that of the available 
source unless otherwise approved by the Commandant upon review of the 
metallurgical aspects of the piping materials with respect to its 
brittle fracture properties.
    (c) Check of test equipment before applying pressure. The test 
equipment must be examined before pressure is applied to ensure that it 
is tight and that all low-pressure filling lines and other items that 
should not be subjected to the test pressure have been disconnected or 
isolated by valves or other suitable means.
    (d) Examination for leakage after application of pressure. Following 
the application of the hydrostatic test pressure for a minimum of 10 
minutes (see Sec. 56.97-30(g)), examination for leakage must be made of 
all joints, connections and of all regions of high stress, such as 
regions around openings and thickness-transition sections.
    (e) Minimum required hydrostatic test pressure. Except as otherwise 
permitted in Sec. 56.97-30(f) or Sec. 56.97-40, piping systems must be 
subjected to a hydrostatic test pressure that at every point in the 
system is not less than 1.5 times the maximum allowable working 
pressure.
    (f) Maximum permissible hydrostatic test pressure. (1) When a system 
is tested hydrostatically, the test pressure must not exceed the maximum 
test pressure of any component such as vessels, pumps, or valves in the 
system.
    (2) At no time during the hydrostatic test may any part of the 
piping system be subjected to a stress greater than 90 percent of its 
yield strength (0.2 percent offset) at test temperature.
    (g) Hydrostatic test pressure holding time. The hydrostatic test 
pressure must be maintained for a minimum total time of 10 minutes and 
for such additional time as may be necessary to conduct the examination 
for leakage required by Sec. 56.97-30(d).

[CGD 73-254, 40 FR 40167, Sept. 2, 1975]



Sec. 56.97-35   Pneumatic tests (Replaces 137.5).

    (a) General Requirements. When a pneumatic test is performed, it 
must be conducted in accordance with the requirements of this section.
    (b) Test medium and test temperature. (1) The gas used as the test 
medium must not be flammable.
    (2) The temperature of the test medium will be that of the available 
source unless otherwise approved by the Commandant upon review of the 
metallurgical aspects of the piping materials with respect to its 
brittle fracture properties.
    (c) Check of test equipment before applying pressure. The test 
equipment must be examined before pressure is applied to ensure that it 
is tight and that all items that should not be subjected to the test 
pressure have been disconnected or isolated by valves or other suitable 
means.
    (d) Procedure for applying pressure. The pressure in the system must 
gradually be increased to not more than one-half of the test pressure, 
after which the pressure is increased in steps of approximately one-
tenth of the test pressure until the required test pressure has been 
reached.
    (e) Examination for leakage after application of pressure. Following 
the application of pressure for the time specified in Sec. 56.97-35(h), 
examination for leakage in accordance with 56.97-30(d) must be 
conducted.
    (f) Minimum required pneumatic test pressure. Except as provided in 
Sec. 56.97-35(g) or Sec. 56.97-40, the pneumatic test pressure may not 
be less than 1.20 nor more than 1.25 times the maximum allowable working 
pressure of the piping subassembly system.

[[Page 230]]

    (g) Maximum permissible pneumatic test pressure. When a system is 
tested pneumatically, the test pressure may not exceed the maximum test 
pressure of any component such as vessels, pumps or valves in the 
system.
    (h) Pneumatic test pressure holding time. The pneumatic test 
pressure must be maintained for a minimum total time of 10 minutes and 
for such additional time as may be necessary to conduct the examination 
for leakage required in Sec. 56.97-30(d).

[CGD 73-254, 40 FR 40168, Sept. 2, 1975]



Sec. 56.97-38   Initial service leak test (Reproduces 137.7).

    (a) An initial service leak test and inspection is acceptable when 
other types of test are not practical or when leak tightness is 
conveniently demonstrable due to the nature of the service. One example 
is turbine extraction piping where shut-off valves are not available for 
isolating a line and where temporary closures are impractical. Others 
may be systems for service water, low pressure condensate, plant and 
instrument air, etc., where checking out of pumps and compressors afford 
ample opportunity for leak tightness inspection prior to fullscale 
operation.
    (b) The piping system must be gradually brought up to design 
pressure. After inspection of the piping system has proven that the 
installation is complete and all joints are leak-tight, the piping has 
met the requirements of Sec. 56.97-1.

[CGD 73-254, 40 FR 40168, Sept. 2, 1975]



Sec. 56.97-40   Installation tests.

    (a) The following piping systems shall be hydrostatically leak 
tested in the presence of a marine inspector at a pressure of 1\1/2\ 
times the maximum allowable working pressure of the system:
    (1) Class I steam, feedwater, and blowoff piping. Where piping is 
attached to boilers by welding without practical means of blanking off 
for testing, the piping shall be subjected to the same hydrostatic 
pressure to which the boiler is tested. The maximum allowable working 
pressures of boiler feedwater and blowoff piping shall be the design 
pressures specified in Secs. 56.50-30(a)(3) and 56.50-40(b), 
respectively.
    (2) Fuel oil discharge piping between the pumps and the burners, but 
not less than 500 pounds per square inch.
    (3) High-pressure piping for tank cleaning operations.
    (4) Flammable or corrosive liquids and compressed gas cargo piping, 
but not less than 150 pounds per square inch.
    (5) Any Class I, I-L, II-L piping.
    (6) Cargo oil piping.
    (7) Firemains, but not less than 150 pounds per square inch.
    (8) Fuel oil transfer and filling piping.
    (9) Class I compressed air piping.
    (b) Installation testing requirements for refrigeration, fluid 
power, and liquefied petroleum gas cooking and heating systems may be 
found in part 58 of this subchapter.
    (c) Class II piping systems shall be tested under working conditions 
as specified in the section on initial service leak test, Sec. 56.97-38.

[CGFR 68-82, 33 FR 18843, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 72-206R, 38 FR 17229, June 29, 1973 CGD 73-
254, 40 FR 40168, Sept. 2, 1975]



PART 57--WELDING AND BRAZING--Table of Contents




                          Subpart 57.01--Scope

Sec.
57.01-1  Qualifications and production tests.

                   Subpart 57.02--General Requirements

57.02-1  Incorporation by reference.
57.02-2  Adoption of section IX of the ASME Code.
57.02-3  Performance qualifications issued by other agencies.
57.02-4  Fabricator's responsibility.
57.02-5  Filler metals.

                 Subpart 57.03--Procedure Qualifications

57.03-1  General requirements.

              Subpart 57.04--Procedure Qualification Range

57.04-1  Test specimen requirements and definition of ranges (modifies 
          QW 202, QW 210, QW 451, and QB 202).

                Subpart 57.05--Performance Qualifications

57.05-1  General.

[[Page 231]]

57.05-2  Transfer of performance qualifications.
57.05-3  Limited space qualifications.
57.05-4  Welder qualification by procedure tests.
57.05-5  Low temperature application.

                     Subpart 57.06--Production Tests

57.06-1  Production test plate requirements.
57.06-2  Production test plate interval of testing.
57.06-3  Method of performing production testing.
57.06-4  Production testing specimen requirements.
57.06-5  Production toughness testing.

    Authority: 46 U.S.C. 3306, 3703, E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18872, Dec. 18, 1968, unless otherwise 
noted.



                          Subpart 57.01--Scope



Sec. 57.01-1   Qualifications and production tests.

    (a) (Replaces QW 101 and QB 101.) The regulations in this part shall 
apply to the qualification of welding procedures, welders, and brazers, 
and to production tests for all types of manual and machine arc and gas 
welding and brazing processes.
    (b) (Modifies QW 305 and QB 305.) Operators of fully automatic 
welding and brazing machines are specifically exempt from performance 
qualification tests.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGD 74-102, 40 FR 
27460, June 30, 1975]



                   Subpart 57.02--General Requirements



Sec. 57.02-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

             American Society of Mechanical Engineers (ASME)

United Engineering Center, 345 East 47th Street, New York, NY 10017
Boiler and Pressure Vessel Code, section IX, Welding and Brazing 
Qualifications, July 1989 with 1989 addenda. 57.01-1; 57.02-2; 57.02-3; 
57.02-4; 57.03-1; 57.04-1; 57.05-1; 57.06-1; 57.06-3; 57.06-4

[CGD 88-032, 56 FR 35823, July 29, 1991, as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; 60 FR 54106, Oct. 19, 1995; CGD 96-041, 61 FR 
50728, Sept. 27, 1996]



Sec. 57.02-2   Adoption of section IX of the ASME Code.

    (a) The qualifications for all types of welders and brazers, the 
qualification of welding procedures, and the production tests for all 
types of manual and machine arc and gas welding and brazing processes 
shall be in accordance with section IX of the ASME (American Society of 
Mechanical Engineers) Code, as limited, modified, or replaced by 
specific requirements in this part. For general information Table 57.02-
1(a) lists the various paragraphs in section IX of the ASME Code which 
are limited, modified, or replaced by regulations in this part.

   Table 57.02-1(a)--Limitations and Modifications to the Adoption of   
                       section IX of the ASME Code                      
------------------------------------------------------------------------
  Paragraphs in section IX ASME code, and                               
                Disposition                       Unit of this part     
------------------------------------------------------------------------
QW-101 replaced by........................  57.01-1(a).                 
QW-103 replaced by........................  57.02-3(a).                 
QW-201 modified by........................  57.03-1(a).                 
QW-202 modified by........................  57.04-1                     
QW-202.1 modified by......................  57.03-1(b).                 
QW-210 modified by........................  57.04-1.                    
QW-211 modified by........................  57.02-4.                    
QW-253 modified by........................  57.03-1(g).                 
QW-254 modified by........................  57.03-1(g).                 
QW-255 modified by........................  57.03-1(g).                 
QW-305 modified by........................  57.01-1(b).                 
QW-451 modified by........................  57.03-1(b) and 57.04-1.     
QB-101 replaced by........................  57.01-1(a).                 

[[Page 232]]

                                                                        
QB-103 replaced by........................  57.02-3(a).                 
QB-201 modified by........................  57.03-1(a).                 
QB-202 modified by........................  57.04-1.                    
QB-305 modified by........................  57.01-1(b).                 
------------------------------------------------------------------------

    (1) As stated in Sec. 50.15-5 of this subchapter, section IX of the 
ASME Code is adopted and shall be the governing requirements for the 
qualification of all types of welders and brazers, the qualification of 
all types of welding procedures, and the production tests for all types 
of manual and machine arc and gas welding and brazing processes used in 
fabricating power boilers, heating boilers, pressure vessels and piping 
unless specifically limited, modified or replaced by other regulations 
in this part.
    (b) References to the ASME Code, like paragraph QW-131.1 indicate:

Q=Section IX, Welding and Brazing Qualifications, ASME Code.
W=Part containing requirements for welding procedure, welder, and 
          welding operator qualifications.
131=Major division within the part.
131.1=Specific subparagraph within the part.

    (c) When a paragraph or a section of the regulations in this part 
relates to material in section IX of the ASME Code, the relationship 
with the code will be shown immediately following the heading of the 
section or at the beginning of the paragraph as follows:
    (1) (Modifies Q------.) This indicates that the material in Q------ 
is generally applicable but is being altered, amplified or augmented.
    (2) (Replaces Q------.) This indicates that Q------ does not apply.
    (3) (Reproduces Q------.) This indicates that Q------ is being 
identically reproduced for convenience, not for emphasis.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 74-102, 40 FR 27460, June 30, 1975. 
Redesignated by CGD 88-032, 56 FR 35823, July 29, 1991; CGD 95-012, 60 
FR 48050, Sept. 18, 1995]



Sec. 57.02-3   Performance qualifications issued by other agencies.

    (a) Within the limits of the qualification tests passed, the Officer 
in Charge, Marine Inspection, may accept welders who have been qualified 
by other agencies of the Federal Government; by the American Bureau of 
Shipping; or by the fabricator concerned, provided the fabricator's 
tests have been certified by an authorized Code inspector as defined in 
paragraphs PG-91, N-612, HG-515.2, or UG-91 of the ASME Code.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968. Redesignated by CGD 88-032, 56 
FR 35832, July 29, 1991]



Sec. 57.02-4   Fabricator's responsibility.

    (a) (Replaces QW 103 and QB 103). Each manufacturer or contractor is 
responsible for the welding and brazing done by his organization and 
shall conduct tests required in this part to qualify the welding and 
brazing procedures used and the performance of welders and brazers who 
apply these procedures. The manufacturer shall bear the expense of 
conducting the tests. Each manufacturer shall maintain a record of the 
test results obtained in welding and brazing procedure and welder and 
brazer performance qualifications. These required records, together with 
identification data, shall be maintained by the manufacturer or 
contractor on the recommended forms illustrated in QW 480 and QB 480 of 
section IX, ASME Code, or on any other form acceptable to the Officer in 
Charge, Marine Inspection. Upon request, duplicate forms shall be 
furnished by the manufacturer or contractor to the marine inspector.
    (b) Except as otherwise provided for in Sec. 57.02-2, the fabricator 
shall notify the Officer in Charge, Marine Inspection, prior to 
conducting performance or procedure qualification tests, and arrange a 
suitable time and place for conducting the tests, so that a marine 
inspector may be present.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGD 74-102, 40 FR 
27460, June 30, 1975. Redesignated by CGD 88-032, 56 FR 35823, July 29, 
1991]

[[Page 233]]



Sec. 57.02-5   Filler metals.

    (a) Except as provided for in paragraph (b) of this section, when 
filler metal is used in a welded fabrication that is required to meet 
the requirements of this part the filler metal must be one that has been 
approved by the American Bureau of Shipping.
    (b) In instances where a fabricator desires to use a filler metal 
which has not been approved by the American Bureau of Shipping the 
approval of the filler metal can be made by the Officer in Charge, 
Marine Inspection on the basis of the fabricator passing the weld 
procedure qualification tests as outlined in this part. This alternate 
means of approval applies to wire-gas and wire-flux combinations as well 
as to stick electrodes. Filler metal approvals given in this manner will 
extend only to the specific fabricator to whom they are granted.

[CGD 74-102, 40 FR 27460, June 30, 1975. Redesignated by CGD 88-032, 56 
FR 35823, July 29, 1991]



                 Subpart 57.03--Procedure Qualifications



Sec. 57.03-1   General requirements.

    (a) (Modifies QW 201 and QB 201). In order to obtain Coast Guard 
approval of a weld procedure to be used on welded fabrication that is 
required to meet the requirements of this part each manufacturer or 
contractor must do the following:
    (1) Each manufacturer or contractor must submit to the cognizant 
Officer in Charge, Marine Inspection, for approval, a welding or brazing 
procedure specification for the particular welding or brazing process to 
be used. The welding or brazing procedure specification must include a 
sketch showing joint preparation. Suggested forms showing the 
information which is required in the welding or brazing procedure 
specification are in QW 480 and QB 480 of section IX of the ASME Code.
    (2) Each manufacturer or contractor must submit to the cognizant 
Officer in Charge, Marine Inspection, for approval, the results of the 
physical tests required by section IX of the ASME Code.
    (b) (Modifies QW 202.1 and QW 451). To obtain approval of the 
welding procedure, fabricators desiring to use any welding process for 
applications involving temperatures below -18 deg. C (approx. 0 deg. F) 
must conduct a procedure qualification test in accordance with the 
requirements of paragraph (a) of this section and the following 
additional requirements:
    (1) The test piece must be large enough so that sufficient material 
is available for the tests prescribed in QW 451 of the ASME Code, plus 
toughness tests and a macro-etch specimen.
    (2) To obtain approval the fabricator must conduct toughness tests 
and qualify in accordance with Sec. 54.05 of the subchapter. Results of 
toughness tests must be submitted for approval to the cognizant Officer 
in Charge, Marine Inspection.
    (3) The macro-etch specimen must be submitted with the test results 
required by paragraph (a) of this section. Macro-etch specimens must not 
be obtained by flame or arc cutting from the test piece. Weld 
reinforcement must remain in place unless the production welds are to be 
machined or ground. Backing rings must also be left in place unless they 
are to be removed in production.
    (4) Low temperature procedure qualification thickness ranges are as 
indicated in Table 57.03-1(b).

     Table 57.03-1(b).--Low temperature weld procedure qualification    
                            thickness ranges                            
------------------------------------------------------------------------
                                                     Range of thickness 
                                                        of materials    
                                                      qualified by test 
 Thickness, ``t'' of test plate or pipe as welded       plate or pipe   
                     (inches)                             (inches)      
                                                   ---------------------
                                                     Minimum    Maximum 
------------------------------------------------------------------------
\1/16\ to \3/8\, inclusive........................     \1/16\      \3/8\
Over \3/8\ but less than \3/4\....................     *\3/8\      \3/4\
\3/4\ to 3, inclusive.............................      \3/4\        **t
------------------------------------------------------------------------
*For thicknesses less than \5/8\ inch, the thickness of the test plate  
  or pipe is the minimum thickness qualified.                           
**Where ``t'' is the thickest material over \3/4\ inch to be used in    
  production.                                                           

    (5) The limits for heat input production, as measured in Joules/
inch, must be at or below the maximum heat input applied to the 
procedure test plate. The word ``maximum'' must not be interpreted as 
either nominal or average.
    (c) [Reserved]
    (d) For quenched and tempered steels, the Commandant may prescribe

[[Page 234]]

special testing to assure that the welding procedure produces weldments 
which are not prone to low energy fracture through the heat affected 
zone.
    (e) Welding procedures that utilize type E 6012, E 6013, E 6014, E 
6024, E 7014, or E 7024 electrode will be approved only for the specific 
type, size, and brand electrode used. If a different type, size, or 
brand of electrode is used, a new procedure qualification test must be 
conducted.
    (f) Welding or brazing procedure approvals cannot be transferred 
from one plant to another plant of the same company or from one company 
to another.
    (g) (Modifies QW 253, QW 254, and QW 255). Item QW 402.4 is an 
essential variable for all procedure specifications.

[CGD 74-102, 40 FR 27461, June 30, 1975]



              Subpart 57.04--Procedure Qualification Range



Sec. 57.04-1   Test specimen requirements and definition of ranges (modifies QW 202, QW 210, QW 451, and QB 202).

    The type and number of specimens that must be tested to qualify an 
automatic, semiautomatic, or manual procedure specification shall be in 
accordance with QW 202, QW 210, or QB 202 of the ASME Code as 
applicable, except as supplemented by Secs. 57.03-1(b) and 57.03-1(d).

[CGD 74-102, 40 FR 27461, June 30, 1975]



                Subpart 57.05--Performance Qualifications



Sec. 57.05-1   General.

    (a) This subpart supplements the various paragraphs in section IX of 
the Code dealing with Performance Qualifications (see Sec. 57.02-2).

[CGFR 69-127, 35 FR 9980, June 17, 1970]



Sec. 57.05-2   Transfer of performance qualifications.

    (a) The performance qualification records of a welder may be 
transferred from one plant to another of the same company or from one 
company to another company provided the following requirements are met:
    (1) The transfer is authorized by the cognizant Officer in Charge, 
Marine Inspection;
    (2) A copy of the qualification test records of each welder together 
with employment records and identification data are transferred by the 
plant or company which qualified the welder to the new plant or company; 
and,
    (3) The new plant or company accepts the welder as qualified.



Sec. 57.05-3   Limited space qualifications.

    When a welder is to be qualified for welding or torch brazing of 
piping on board ship in a limited or restricted space, the space 
restrictions shown in connection with Figure 57.05-3(a) or (b) shall be 
used when welding and brazing the test joint.

[[Page 235]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.028


     Figure 57.05-3(a)--Limited space restriction for pipe welding 
                       performance qualification.

[[Page 236]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.029


     Figure 57.05-3(b)--Limited space restriction for pipe brazing 
                       performance qualification.

[CGFR 68-82, 33 FR 118872, Dec. 18, 1968, as amended by CGD 74-102, 40 
FR 27461, June 30, 1975]



Sec. 57.05-4  Welder qualification by procedure tests.

    Qualification tests of welders may be omitted for welders who weld 
satisfactory procedure qualification test assemblies as required by 
subpart 57.03.



Sec. 57.05-5   Low temperature application.

    For low temperature application, each welder shall demonstrate his 
ability to weld satisfactorily in accordance with procedures qualified 
in accordance with Sec. 57.03-1(b). Manual welding shall be qualified in 
the position prescribed by the procedure.



                     Subpart 57.06--Production Tests



Sec. 57.06-1   Production test plate requirements.

    (a) Production test plates shall be provided for Class I, Class I-L, 
Class II, and Class II-L pressure vessels are specified in this section.
    (b) Main power boilers shall meet the test plate requirements for 
Class I pressure vessels.
    (c) Test plates are not required for heating boilers or Class III 
pressure vessels. Test plates are not required for main power boilers or 
pressure vessels constructed of P-1 material as listed in QW 422 of the 
ASME Code whose welded joints are fully radiographed as required by Part 
52 or 54 of this subchapter as applicable except when toughness tests 
are required in accordance with Sec. 57.06-5. When toughness tests are 
required all prescribed production tests shall be performed.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 72-206R, 38 FR 17229, June 29, 1973; CGD 74-
102, 40 FR 27461, June 30, 1975; CGD 95-012, 60 FR 48050, Sept. 18, 
1995]

[[Page 237]]



Sec. 57.06-2   Production test plate interval of testing.

    (a) At least one set of production test plates shall be welded for 
each Class I or Class I-L pressure vessel except as follows:
    (1) When the extent of welding on a single vessel exceeds 50 lineal 
feet of either or both longitudinal and circumferential joints, at least 
one set of test plates shall be welded for each 50 feet of joint.
    (2) When the extent of welding on vessels welded in succession 
exceeds 50 lineal feet of either or both longitudinal and 
circumferential joints, at least one set of test plates shall be welded 
for each 50 feet of aggregate joint of the same material where the plate 
thicknesses fall within a range of one-fourth inch. For each 50-foot 
increment of weld, test plates shall be prepared at the time of 
fabrication of the first vessel involving that increment.
    (b) Production test plates for Class II-L pressure vessels shall be 
prepared as for Classes I and I-L vessels except that the provisions of 
paragraphs (a)(1) and (2) of this section are applicable to each 150 
lineal feet of welded joint in lieu of each 50 lineal feet.
    (c) In the case of Class II pressure vessels no more than one set of 
production test plates need be prepared for each 300 lineal feet of 
either or both longitudinal and circumferential joints. In the case of 
single vessel fabrication a set of test plates is required for each 300 
lineal feet of weld or fraction thereof. In the case of multiple vessel 
fabrication where each increment of 300 lineal feet of weld involves 
more than one pressure vessel, the set of test plates shall be prepared 
at the time of fabrication of the first vessel involving that increment.



Sec. 57.06-3   Method of performing production testing.

    (a) Except as otherwise specified in this section a test plate shall 
be attached to the shell plate on one end of the longitudinal joint of 
each vessel as shown in Figure 57.06-3, so that the edges of the test 
plate to be welded are a continuation of and duplication of the 
corresponding edges of the longitudinal joint. For attached test plates, 
the weld metal shall be deposited in the test plate welding groove 
continuously with the weld metal deposited in the groove of the 
longitudinal joint. As an alternate method, the marine inspector may 
permit the use of separate test plates, provided the same welding 
process, procedure, and technique employed in the fabrication of the 
longitudinal joint are used in welding the test plates.
    (b) All test plates, whether attached to the shell or separate in 
accordance with paragraphs (a) and (d) of this section, shall be 
prepared from material of the same specification, thickness, and heat 
treatment and, for Class I-L and Class II-L vessels, the same heat as 
that of the vessel for which they are required. However, except when 
required to be from a specific heat, test plates may be prepared from 
material of a different product form, such as plate in lieu of a 
forging, provided the chemical composition is within the vessel material 
specification limits and the melting practice is the same.
    (c) Test plates are not required for welded nozzle attachments.
    (d) In the case of vessels having no longitudinal welded joints, at 
least one set of test plates shall be welded for each vessel, using the 
circumferential joint process, procedure and technique, except that the 
provisions of Sec. 57.06-2(a) shall also apply for Classes I and I-L 
vessels, and that the provisions of Sec. 57.06-2 (a) and (c) shall also 
apply for Classes II and II-L vessels.

[[Page 238]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.030



 Figure 57.06-3.--(PW-53.2) Method of forming longitudinal test plates.

    (e) Test plates shall be made by the same welder producing the 
longitudinal and circumferential joints. If more than one welder is 
employed in the welding of the pressure vessel(s), the test plates shall 
be made by the welder designated by the marine inspector. The test 
plates shall be of the same thickness as the material being welded and 
shall be of sufficient size to provide two specimens of each type 
required, except that in the case of pressure vessels having no 
longitudinal seams, the test plate need be only of sufficient length to 
provide one set of test specimens, and if a retest is necessary, an 
additional set of test plates may be welded separately.



Sec. 57.06-4   Production testing specimen requirements.

    (a) For test plates three-fourths inch or less in thickness one 
reduced section tensile specimen and two free-bend specimens shall be 
tested. For plates exceeding three-fourths inch in thickness one reduced 
section tensile specimen, one free-bend specimen and one guided side 
bend specimen shall be tested. In addition boiler drums of thickness 
five-eighths inch or greater shall have a tension test specimen of the 
weld metal as required by paragraph (f)(2) of this section. Toughness 
tests are required for Classes I-L and II-L pressure vessels as 
specified in Sec. 57.06-5.
    (b) The test plates shall be so supported that the warping due to 
welding shall not throw the finished test plate out of line by an angle 
of over 5 deg..
    (c) Where the welding has warped the test plates, the plates shall 
be straightened before being stress-relieved. The test plates shall be 
subjected to the same stress-relieving operation as required by this 
subchapter for the pressure vessel itself. At no time shall the test 
plates be heated to a temperature higher than that used for stress-
relieving the vessel.
    (d) The bend specimens shall be taken from opposite sides of the 
reduced-section tensile specimen in their respective test plates as 
shown in Figures 57.06-4(d)(1) and 57.06-4(d)(2).

[[Page 239]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.031


    \1\ When charpy V notch impact specimens are required, the test 
plates shall be no smaller than 2 feet on a side.

   Figure 57.06-4(d)(1).--Workmanship test plates for material three-
                   fourths inch or less in thickness.

[[Page 240]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.032


   Figure 57.06-4(d)(2).--Workmanship test plates for material three-
                   fourths inch or less in thickness.
    (e) In submitting the samples for test the manufacturer shall state 
the minimum and maximum tensile range of the base metal.
    (f) The external appearances of the welds and the amount of weld 
reinforcement shall conform to the requirements for fabrication, and the 
maximum reinforcement for the test plates shall not exceed the maximum 
permitted for construction.
    (1) The tension-test specimen of the joint shall be transverse to 
the welded joint and shall be of the full thickness of the plate after 
the weld reinforcement has been machined flush. The form and dimensions 
shall be as shown in Figure 57.06-4(f)(1)(i). When the capacity of the 
available testing machine does not permit testing a specimen of the full 
thickness of the welded plate, the specimen may be cut with a thin saw 
into as many portions of the thickness as necessary, as shown in Figure 
57.06-4(f)(1)(ii) each of which shall meet the requirements. The tensile 
strength of the joint specimen when it breaks in the weld shall not be 
less than the minimum of the specified tensile range of the plate used. 
If the specimen breaks in the plate at not less than 95 percent of the 
minimum specified tensile range

[[Page 241]]

of the plate and the weld shows no sign of weakness, the test is 
considered acceptable.
    (2) Boiler drums fabricated of plate of thicknesses of five-eighths 
inch or greater shall have a tension-test specimen of the weld metal 
machined to form as shown in Figure 57.06-4(f)(2) taken entirely from 
the deposited metal. The all-weld tension test specimen shall have a 
tensile strength of not less than the minimum of the range of the plate 
which is welded and shall have a minimum elongation in 2 inches of not 
less than 20 percent.
[GRAPHIC] [TIFF OMITTED] TC01FE91.033

 Figure 57.06-4(f)(1)(i).--(PW-53.1) Reduced-section test specimen for 
                      tension test of welded joint.

[[Page 242]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.034


    Figure 57.06-4(f)(1)(ii).--(PW-53.3) Cross section of bend-test 
                    specimens from very thick plate.
[GRAPHIC] [TIFF OMITTED] TC01FE91.035

 Figure 57.06-4(f)(2).--(PW-53.3) All weld metal tension-test specimen.
    (g) The freebend specimens shall be of the form and dimensions shown 
in Figure 57.06-4(g). For plates of three-fourths inch or less in 
thickness one of the specimens shall be bent with the face of the weld 
in tension. Each freebend specimen shall be bent cold under freebending 
conditions until the

[[Page 243]]

elongation measured within or across approximately the entire weld on 
the outer surface of the bend is at least 30 percent, except that for 
Class II and Class II-L pressure vessels, the minimum elongation shall 
be 20 percent. When the capacity of the available testing machine will 
not permit testing a full thickness specimen, the specimen may be cut 
with a thin saw into as many portions of the thickness as necessary as 
shown in Figure 57.06-4(f)(1)(ii), provided each such piece retains the 
proportion of 1\1/2\ to 1, width to thickness, each of which shall meet 
the requirements. Cracks at the corners of the specimens or small 
defects in the convex surface, the greatest dimensions of which do not 
exceed one-sixteenth inch need not be considered as failures.
[GRAPHIC] [TIFF OMITTED] TC01FE91.036

Figure 57.06-4(g).--(PW-53.8) Specimen for free-bend test.______________
    (h) The guided-bend specimen shall be bent with the side of the weld 
in tension, its width shall be equal to the full thickness of the plate 
and its thickness, after machining, shall be 0.350 inch to 0.380 inch to 
permit bending in a jig having the contour of the standard jig as shown 
in Figure QW 466.1, QW 466.2, or QW 466.3 of the ASME Code. The specimen 
shall withstand being bent cold to the full capacity of the jig without 
developing any crack exceeding one-eighth inch in any direction. Where 
the plate thickness exceeds two inches, the specimen shall be cut in two 
so that each portion does not exceed 2 inches in width. Each such 
portion shall be tested and shall meet the requirements.
    (i) One retest shall be made for each of the original specimens 
which fails to meet the requirements. Should the retests fail to meet 
the requirements, the welds which they represent shall be chipped out, 
rewelded and new test plates provided.

[CGFR 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGFR 69-127R, 35 
FR 9980, June 17, 1970; CGD 74-102, 40 FR 27461, June 30, 1975; CGD 80-
004, 45 FR 10796, Feb. 19, 1980; CGD 95-012, 60 FR 48050, Sept. 18, 
1995]

[[Page 244]]



Sec. 57.06-5   Production toughness testing.

    (a) In addition to the test specimens required by Sec. 57.06-4(a), 
production toughness test plates shall be prepared for Classes I-L and 
II-L pressure vessels in accordance with subpart 54.05 of this 
subchapter.
    (b) For nonpressure vessel type cargo tanks and associated secondary 
barriers as defined in Sec. 38.05-4 of subchapter D (Tank Vessels) of 
this chapter, production toughness test plates shall be prepared in 
accordance with subpart 54.05 of this subchapter.

[CGD 68-82, 33 FR 18872, Dec. 18, 1968, as amended by CGD 72-206R, 38 FR 
17229, June 29, 1973; CGD 95-012, 60 FR 48050, Sept. 18, 1995]



PART 58--MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents




                   Subpart 58.01--General Requirements

Sec.
58.01-1  Scope.
58.01-5  Applicable standards.
58.01-10  Fuel oil.
58.01-20  Machinery guards.
58.01-25  Means of stopping machinery.
58.01-30  Trial-trip observance.
58.01-35  Main propulsion auxiliary machinery.
58.01-40  Machinery, angles of inclination.
58.01-45  Machinery space, ventilation.
58.01-50  Machinery space, noise.
58.01-55  Tanks for flammable and combustible oil.

                Subpart 58.03--Incorporation of Standards

58.03-1  Incorporation by reference.

                Subpart 58.05--Main Propulsion Machinery

58.05-1  Material, design and construction.
58.05-5  Astern power.
58.05-10  Automatic shut-off.

         Subpart 58.10--Internal Combustion Engine Installations

58.10-5  Gasoline engine installations.
58.10-10  Diesel engine installations.
58.10-15  Gas turbine installations.

    Subpart 58.16--Liquefied Petroleum Gases for Cooking and Heating

58.16-1  Scope.
58.16-5  Definition.
58.16-7  Use of liquefied petroleum gas.
58.16-10  Approvals.
58.16-15  Valves and safety relief devices.
58.16-16  Reducing regulators.
58.16-17  Piping and fittings.
58.16-18  Installation.
58.16-19  Tests.
58.16-20  Ventilation of compartments containing gas-consuming 
          appliances.
58.16-25  Odorization.
58.16-30  Operating instructions.
58.16-35  Markings.

                 Subpart 58.20--Refrigeration Machinery

58.20-1  Scope.
58.20-5  Design.
58.20-10  Pressure relieving devices.
58.20-15  Installation of refrigerating machinery.
58.20-20  Refrigeration piping.
58.20-25  Tests.

                      Subpart 58.25--Steering Gear

58.25-1  Applicability.
58.25-5  General.
58.25-10  Main and auxiliary steering gear.
58.25-15  Voice communications.
58.25-20  Piping for steering gear.
58.25-25  Indicating and alarm systems.
58.25-30  Automatic restart.
58.25-35  Helm arrangements.
58.25-40  Arrangement of the steering-gear compartment.
58.25-45  Buffers.
58.25-50  Rudder stops.
58.25-55  Overcurrent protection for steering-gear systems.
58.25-60  Non-duplicated hydraulic rudder actuators.
58.25-65  Feeder circuits.
58.25-70  Steering-gear control systems.
58.25-75  Materials.
58.25-80  Automatic pilots and ancillary steering gear.
58.25-85  Special requirements for tank vessels.

             Subpart 58.30--Fluid Power and Control Systems

58.30-1  Scope.
58.30-5  Design requirements.
58.30-10  Hydraulic fluid.
58.30-15  Pipe, tubing, valves, fittings, pumps, and motors.
58.30-20  Fluid power hose and fittings.
58.30-25  Accumulators.
58.30-30  Fluid power cylinders.
58.30-35  Testing.
58.30-40  Plans.
58.30-50  Requirements for miscellaneous fluid power and control 
          systems.

                  Subpart 58.50--Independent Fuel Tanks

58.50-1  General requirements.
58.50-5  Gasoline fuel tanks.

[[Page 245]]

58.50-10  Diesel fuel tanks.
58.50-15  Alternate material for construction of independent fuel tanks.

  Subpart 58.60--Industrial systems and Components on Mobile Offshore 
                          Drilling Units (MODU)

58.60-1  Applicability.
58.60-2  Alternative and substitutions.
58.60-3  Pressure vessel.
58.60-5  Industrial systems: locations.
58.60-7  Industrial systems: piping.
58.60-9  Industrial systems: design.
58.60-11  Analyses, plans, diagrams and specification: submission.
58.60-13  Inspection.

    Authority: 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 
58801, 3 CFR, 1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18878, Dec. 18, 1968, unless otherwise 
noted.



                   Subpart 58.01--General Requirements



Sec. 58.01-1   Scope.

    The regulations in this part contain requirements for the design and 
construction of main and auxiliary machinery installed on vessels.



Sec. 58.01-5   Applicable standards.

     The applicable standards established by the American Bureau of 
Shipping or other recognized classification society, may be used as the 
standard for the design, construction, and testing of main and auxiliary 
machinery except as modified in this subchapter.



Sec. 58.01-10  Fuel oil.

    (a) The following limits apply to the use of oil as fuel:
    (1) Except as otherwise permitted by this section, no fuel oil with 
a flashpoint of less than 60 deg.C (140 deg.F) may be used.
    (2) Except as otherwise permitted by Sec. 58.50-1(b), fuel oil with 
a flashpoint of not less than 43 deg.C (110 deg.F) may be used in 
emergency generators.
    (3) Subject to such additional precautions as the Commanding 
Officer, Marine Safety Center, considers necessary, and provided that 
the ambient temperature of the space in which such fuel oil is stored or 
used does not rise to within 10 deg.C (50 deg.F) below the flashpoint of 
the fuel oil, fuel oil having a flashpoint of less than 60 deg.C 
(140 deg.F) but not less than 43 deg.C (110 deg.F) may be used in 
general.
    (4) In a cargo vessel, fuel having a lower flashpoint than otherwise 
specified in this section--for example, crude oil--may be used provided 
that such fuel is not stored in any machinery space and that the 
Commanding Officer, Marine Safety Center, approves the complete 
installation.
    (b) The flashpoint of oil must be determined by the Pensky-Martens 
Closed Tester, ASTM-D93-80.

[CGD 83-043, 60 FR 24775, May 10, 1995]



Sec. 58.01-20   Machinery guards.

    Gears, couplings, flywheels and all machinery capable of injuring 
personnel shall be provided with adequate covers or guards.



Sec. 58.01-25  Means of stopping machinery.

    Machinery driving forced-draft and induced-draft fans, fuel-oil 
transfer pumps, fuel-oil unit and service pumps, and similar fuel-oil 
pumps must be fitted with remote controls from a readily accessible 
position outside the space concerned so that the fans or pumps may be 
stopped in case of fire in the compartment in which they are located. 
The controls must be suitably protected against accidental operation and 
against tampering and must be suitably marked.

[CGD 83-043, 60 FR 24775, May 10, 1995]



Sec. 58.01-30   Trial-trip observance.

    The operation of main and auxiliary engines, boilers, steering gear, 
and auxiliaries shall be observed on the trial trip of each new vessel 
and all deficiencies which affect the safety of the vessel shall be 
corrected to the satisfaction of the Officer in Charge, Marine 
Inspection.



Sec. 58.01-35  Main propulsion auxiliary machinery.

    Auxiliary machinery vital to the main propulsion system must be 
provided in duplicate unless the system served is provided in 
independent duplicate, or otherwise provides continued or restored 
propulsion capability in

[[Page 246]]

the event of a failure or malfunction of any single auxiliary component.

    Note: Partial reduction of normal propulsion capability as a result 
of malfunction or failure is acceptable if the reduced capability is not 
below that necessary for the vessel to run ahead at 7 knots or half 
speed, whichever is less, and is adequate to maintain control of the 
ship.

[CGD 81-030, 53 FR 17837, May 18, 1988]



Sec. 58.01-40  Machinery, angles of inclination.

    (a) Propulsion machinery and all auxiliary machinery essential to 
the propulsion and safety of the vessel must be designed to operate when 
the vessel is upright, when the vessel is inclined under static 
conditions at any angle of list up to and including 15 deg., and when 
the vessel is inclined under dynamic conditions (rolling) at any angle 
of list up to and including 22.5 deg. and, simultaneously, at any angle 
of trim (pitching) up to and including 7.5 deg. by bow or stern.
    (b) Deviations from these angles of inclination may be permitted by 
the Commanding Officer, Marine Safety Center, considering the type, 
size, and service of the vessel.

[CGD 83-043, 60 FR 24775, May 10, 1995]



Sec. 58.01-45  Machinery space, ventilation.

    Each machinery space must be ventilated to ensure that, when 
machinery or boilers are operating at full power in all weather 
including heavy weather, an adequate supply of air is maintained for the 
operation of the machinery and for the safety, efficiency, and comfort 
of the crew.

[CGD 83-043, 60 FR 24775, May 10, 1995]



Sec. 58.01-50  Machinery space, noise.

    (a) Each machinery space must be designed to minimize the exposure 
of personnel to noise in accordance with IMO Assembly Resolution 
A.468(XII), Code on Noise Levels on Board Ships, 1981. No person may 
encounter a 24-hour effective noise level greater than 82 dB(A) when 
noise is measured using a sound-level meter and an A-weighting filter.
    (b) Except as allowed by paragraph (c) of this section, no machinery 
space may exceed the following noise levels:

(1) Machinery control room--75 dB(A)
(2) Manned machinery space--90 dB(A)
(3) Unmanned machinery space--110 dB(A)
(4) Periodically unattended machinery space--110 dB(A)
(5) Workshop--85 dB(A)
(6) Any other work space around machinery--90 dB(A)

    (c) If adding a source of noise would cause a machinery space to 
exceed the noise level permitted by paragraph (b) of this section, the 
new source must be suitably insulated or isolated so that the space does 
not exceed that noise level. If the space is manned, a refuge from noise 
must be provided within the space.
    (d) Ear protection must be provided for any person entering any 
space with a noise level greater than 85 dB(A).
    (e) Each entrance to a machinery space with a noise level greater 
than 85 dB(A) must have a warning sign stating that each person entering 
the space must wear ear protection.

[CGD 83-043, 60 FR 24776, May 10, 1995]



Sec. 58.01-55  Tanks for flammable and combustible oil.

    (a) For the purposes of this section, a machinery space of category 
A is a space that contains any of the following:
    (1) Internal-combustion machinery used for main propulsion.
    (2) Internal-combustion machinery used for other than main 
propulsion, whose power output is equal to or greater than 500 HP (375 
kw).
    (3) Any oil-fired boiler.
    (4) Any equipment used to prepare fuel oil for delivery to an oil-
fired boiler, or equipment used to prepare heated oil for delivery to an 
internal-combustion engine, including any oil-pressure pumps, filters, 
and heaters dealing with oil pressures above 26 psi.
    (b) As far as practicable, each fuel-oil tank must be part of the 
vessel's structure and be located outside a machinery space of category 
A.
    (c) If a fuel-oil tank, other than a double-bottom tank, must be 
located

[[Page 247]]

adjacent to or within a machinery space of category A--
    (1) At least one of its vertical sides must be contiguous to the 
boundary of the machinery space;
    (2) The tank must have a common boundary with the double-bottom 
tanks; and
    (3) The area of the tank boundary common with the machinery spaces 
must be kept as small as practicable.
    (d) If a fuel-oil tank must be located within a machinery space of 
category A, it must not contain fuel oil with a flashpoint of less than 
60 deg.C (140 deg.F).
    (e) In general, no freestanding fuel-oil tank is permitted in any 
machinery space of Category A on a passenger vessel. A freestanding 
fuel-oil tank is permitted in other spaces only if authorized by the 
Commanding Officer, Marine Safety Center. If so authorized, each 
freestanding fuel-oil tank must--
    (i) Comply with Subpart 58.50 of this subchapter; and
    (ii) Be placed in an oil-tight spill tray with a drain pipe leading 
to a spill-oil tank.
    (f) No fuel-oil tank may be located where spillage or leakage from 
it can constitute a hazard by falling on heated surfaces. The design 
must also prevent any oil that may escape under pressure from any pump, 
filter, or heater from coming into contact with heated surfaces.

[CGD 83-043, 60 FR 24776, May 10, 1995]



                Subpart 58.03--Incorporation of Standards



Sec. 58.03-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

                 American Boat and Yacht Council (ABYC)

3069 Solomons Island Road, Edgewater, MD 21037
P-1-73, Safe Installation of Exhaust Systems for Propulsion and 
Auxiliary Machinery, 1973........................................58.10-5

                    American Bureau of Shipping (ABS)

Two World Trade Center, 106th Floor, New York, NY 10048
Rules for Building and Classing Steel Vessels, 1989....58.01-5; 58.05-1; 
                                              58.10-15; 58.20-5; 58.25-5

              American National Standards Institute (ANSI)

11 West 42nd Street, New York, NY 10036
ANSI B31.3, Chemical Plant and Petroleum Refinery Piping, 1987...58.60-7
ANSI B31.5, Refrigeration Piping, 1987.................58.20-5; 58.20-20
ANSI B93.5, Recommended practice for the use of Fire Resistant Fluids 
for Fluid Power Systems, 1979...................................58.30-10

                   American Petroleum Institute (API)

1201 L Street NW., Washington, DC 20037.
API RP 14C, Analysis, Design, Installation and Testing of Basic Surface 
Safety Systems for Offshore Production Platforms, 1986...........58.60-9
API RP 53, Recommended Practice for Blowout Prevention Equipment Systems 
for Drilling Wells, 1984.........................................58.60-7

             American Society of Mechanical Engineers (ASME)

United Engineering Center, 345 East 47th Street, New York, NY 10017.
Boiler and Pressure Vessel Code,
Section I, Power Boilers, July 1989 with 1989 addenda...........58.30-15
Section VIII, Division 1, Pressure Vessels, July 1989 with 1989 addenda 
                                                                58.30-15

            American Society for Testing and Materials (ASTM)

1916 Race Street, Philadelphia, PA 19103
ASTM A-193-90, Standard Specification for Alloy-Steel and Stainless 
Steel Bolting Materials for High-Temperature Service, 1990......58.30-15
ASTM B-122-85, Standard Specification for Copper-Nickel-Tin Alloy, 
Copper-Nickel-Zinc Alloy (Nickel Silver) and Copper-Nickel Alloy Plate, 
Sheet, Strip and Rolled Bar, 1985................................58.50-5

[[Page 248]]

ASTM B-127-80a, Standard Specification for Nickel-Copper Alloy (UNS No. 
4400) Plate, Sheet and Strip, 1980.....................58.50-5; 58.50-10
ASTM B-152-84, Standard Specification for Copper Sheet, Strip, Plate and 
Rolled Bar, 1984.................................................58.50-5
ASTM B-209-81, Standard Specification for Aluminum and Aluminum-Alloy 
Sheet and Plate, 1981..................................58.50-5; 58.50-10
ASTM D-92-78, Test Method for Flash and Fire Points by Cleveland Open 
Cup, 1978.......................................................58.30-10
ASTM D-93-80, Test Method for Flash Point by Pensky-Martens Closed 
Tester, 1980................................58.01-10; 58.01-15; 58.30-10
ASTM D-323-79, Test Method for Vapor Pressure of Petroleum Products 
(Reid Method), 1979..............................................58.16-5

                International Maritime Organization (IMO)

4 Albert Embankment, London SE1 7SR, England
A.467(XII), Guidelines for Acceptance of Non-Duplicated Rudder Actuators 
for Tankers, Chemical Tankers and Gas Carriers of 10,000 Tons Gross 
Tonnage and Above But Less Than 100,000 Tonnes Deadweight, 1981--58.25-
60
A.468(XII), Code on Noise Levels on Board Ships, 1981--58.01-50

                   Military Specifications (MIL-SPEC)

Naval Publication and Forms Center, Code 1052, 5801 Tabor Avenue, 
          Philadelphia, PA 19120
MIL-S-901, Requirements for High Impact Shock Tests of Shipboard 
Machinery Equipment and Systems, 1963...........................58.30-17

               National Fire Protection Association (NFPA)

1 Batterymarch Park, Quincy, MA 02269
NFPA 302, Fire Protection Standard for Pleasure and Commercial Craft, 
1989..........................................................58.10-5...
                  Society of Automotive Engineers (SAE)
400 Commonwealth Drive, Warrendale, PA 15096
SAE J-1928, Devices Providing Backfire Flame Control for Gasoline 
Engines in Marine Applications, 1989..........................58.10-5...
                  Underwriters Laboratories, Inc. (UL)
12 Laboratory Drive, Research Triangle Park, NC 27709
UL 1111, Marine Carburetor Flame Arresters, 1988.................58.10-5

[CGD 88-032, 56 FR 35823, July 29, 1991, as amended by CGD 83-043, 60 FR 
24776, May 10, 1995; CGD 95-012, 60 FR 48050, Sept. 18, 1995; CGD 95-
072, 60 FR 50462, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 
1996]



                Subpart 58.05--Main Propulsion Machinery



Sec. 58.05-1   Material, design and construction.

    (a) The material, design, construction, workmanship, and arrangement 
of main propulsion machinery and of each auxiliary, directly connected 
to the engine and supplied as such, must be at least equivalent to the 
standards established by the American Bureau of Shipping or other 
recognized classification society, except as otherwise provided by this 
subchapter.
    (b) When main and auxiliary machinery is to be installed without 
classification society review, the builder shall submit in quadruplicate 
to the cognizant Officer in Charge, Marine Inspection, such drawings and 
particulars of the installation as are required by the American Bureau 
of Shipping rules for similar installations on classed vessels.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 83-043, 60 FR 
24776, May 10, 1995]



Sec. 58.05-5   Astern power.

    (a) All vessels shall have sufficient power for going astern to 
secure proper control of the ship in all normal circumstances.



Sec. 58.05-10  Automatic shut-off.

    Main propulsion machinery must be provided with automatic shut-off 
controls in accordance with part 62 of this subchapter. These controls 
must shut down main propulsion machinery in case of a failure, such as 
failure of the lubricating-oil supply, that could lead rapidly to 
complete breakdown, serious damage, or explosion.

[CGD 83-043, 60 FR 24776, May 10, 1995]

[[Page 249]]



         Subpart 58.10--Internal Combustion Engine Installations



Sec. 58.10-5   Gasoline engine installations.

    (a) Engine design. All installations shall be of marine type engines 
suitable for the intended service, designed and constructed in 
conformance with the requirements of this subchapter.
    (b) Carburetors. (1) Drip collectors shall be fitted under all 
carburetors, except the down-draft type, to prevent fuel leakage from 
reaching the bilges and so arranged as to permit ready removal of such 
fuel leakage. Drip collectors shall be covered with flame screens.

    Note: It is recommended that drip collectors be drained by a device 
for automatic return of all drip to engine air intakes.

    (2) All gasoline engines must be equipped with an acceptable means 
of backfire flame control. Installations of backfire flame arresters 
bearing basic Approval Nos. 162.015 or 162.041 or engine air and fuel 
induction systems bearing basic Approval Nos. 162.015 or 162.042 may be 
continued in use as long as they are serviceable and in good condition. 
New installations or replacements must meet the applicable requirements 
of this section.
    (3) The following are acceptable means of backfire flame control for 
gasoline engines:
    (i) A backfire flame arrester complying with SAE J-1928 or UL 1111 
and marked accordingly. The flame arrester must be suitably secured to 
the air intake with a flametight connection.
    (ii) An engine air and fuel induction system which provides adequate 
protection from propagation of backfire flame to the atmosphere 
equivalent to that provided by an acceptable backfire flame arrester. A 
gasoline engine utilizing an air and fuel induction system, and operated 
without an approved backfire flame arrester, must either include a reed 
valve assembly or be installed in accordance with SAE J-1928.
    (iii) An arrangement of the carburetor or engine air induction 
system that will disperse any flames caused by engine backfire. The 
flames must be dispersed to the atmosphere outside the vessel in such a 
manner that the flames will not endanger the vessel, persons, on board, 
or nearby vessels and structures. Flame dispersion may be achieved by 
attachments to the carburetor or location of the engine air induction 
system. All attachments must be of metallic construction with flametight 
connections and firmly secured to withstand vibration, shock, and engine 
backfire. Such installations do not require formal approval and labeling 
but must comply with this subpart.
    (c) Exhaust manifold. The exhaust manifold shall either be water-
jacketed and cooled by discharge from a pump which operates whenever the 
engine is running, or woodwork within nine inches shall be protected by 
\1/4\-inch asbestos board covered with not less than No. 22 USSG (U.S. 
standard gage) galvanized sheet iron or nonferrous metal. A dead air 
space of \1/4\-inch shall be left between the protecting asbestos and 
the wood, and a clearance of not less than two inches maintained between 
the manifold and the surface of such protection.
    (d) Exhaust pipe. (1) Exhaust pipe installations shall conform to 
the requirements of the American Boat and Yacht Council Standard P-1 
``Safe Installation for Exhaust Systems'' and National Fire Protection 
Association Standard NFPA 302, part 1, section 23 and the following 
additional requirements:
    (i) All exhaust installations with pressures in excess of 15 pounds 
per square inch gage or employing runs passing through living or working 
spaces shall meet the material requirements of part 56 of this 
subchapter.
    (ii) Horizontal dry exhaust pipes are permitted only if they do not 
pass through living or berthing spaces, they terminate above the deepest 
load waterline and are so arranged as to prevent entry of cold water 
from rough or boarding seas, and they are constructed of corrosion 
resisting material ``at the hull penetration.''

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 88-032, 56 FR 
35824, July 29, 1991]

[[Page 250]]



Sec. 58.10-10   Diesel engine installations.

    (a) The requirements of Sec. 58.10-5 (a), (c), and (d) shall apply 
to diesel engine installations.
    (b) On installations of engines of the semidiesel or hotbulb type, 
woodwork within 3 feet of starting torches shall be protected by at 
least \1/4\-inch asbestos board covered with sheet metal and a dead 
airspace of at least \1/4\-inch between the asbestos board and the wood.
    (c) A diesel engine air intake on a mobile offshore drilling unit 
must not be in a classified location.1
    (d) A diesel engine exhaust on a mobile offshore drilling unit must 
not discharge into a classified location.1
---------------------------------------------------------------------------

    1Sections 108.171 to 108.175 of this chapter define classified 
locations for mobile offshore drilling units.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56801, Dec. 4, 1978]



Sec. 58.10-15   Gas turbine installations.

    (a) Standards. The design, construction, workmanship and tests of 
gas turbines and their associated machinery shall be at least equivalent 
to the standards of the American Bureau of Shipping or other recognized 
classification society.
    (b) Materials. The materials used for gas turbine installations 
shall have properties suitable for the intended service. When materials 
not conforming to standard ASTM specifications are employed, data 
concerning their properties, including high temperature strength data, 
where applicable, shall be furnished.
    (c) Exhausts. (1) Where piping is used for gas turbine exhaust 
lines, Class II is required as a minimum. (See subpart 56.04 of this 
subchapter.) Where the exhaust pressure exceeds 150 pounds per square 
inch, such as in closed cycle systems, Class I shall be used. Where 
ducting other than pipe is employed, the drawings and design data shall 
be submitted to substantiate suitability and safety for the intended 
service.
    (2) Where considered necessary, gas turbines and associated exhaust 
systems shall be suitably insulated or cooled, by means of lagging, 
water spray, or a combination thereof.
    (3) Gas turbine exhausts shall not be interconnected with boiler 
uptakes except for gas turbines used for emergency power and lighting or 
for emergency propulsion. Dampers or other suitable means shall be 
installed to prevent backflow of boiler exhaust gases through the 
turbine. Interconnected exhausts must be specifically approved by the 
Commandant.
    (4) A gas turbine exhaust on a mobile offshore drilling unit must 
not discharge in a classified location.1
    (d) Air inlets. Air inlets must be designed as follows:
    (1) Each air inlet must have means to protect the safety of life and 
to prevent the entrance of harmful foreign material, including water, 
into the system.
    (2) A gas turbine air inlet must not be in a classified 
location.1
---------------------------------------------------------------------------

    1 Sections 108.171 to 108.175 of this Chapter define classified 
locations for mobile offshore drilling units.
---------------------------------------------------------------------------

    (e) Cooling and ventilation. Means shall be provided for circulating 
air, either natural or forced, through the engine compartment for 
cooling and ventilation.
    (f) Automatic shutdown. (1) The control system shall be designed for 
automatic shutdown of the engine with actuation of audible and visible 
alarms at shutdown. The visible malfunction indicator shall indicate 
what condition caused the shutdown and remain visible until reset. 
Automatic shutdown shall occur under the following conditions:
    (i) Overspeed.
    (ii) Low lubricating oil pressure. Consideration will be given 
providing alarm only (without shutdown) in those cases where suitable 
antifriction bearings are fitted.
    (2) Audible or visible alarms shall also be provided for:
    (i) Excessive gas temperature, measured at the turbine inlet, gas 
generator, interstage turbine or turbine exhaust.
    (ii) Excessive lubricating oil temperature.
    (iii) Excessive speed.
    (iv) Reduced lubricating oil pressure.
    (3) A remote, manually operated shutdown device shall be provided. 
Such device may be totally mechanical

[[Page 251]]

or may be electrical with a manually actuated switch.
    (g) Drawings and design data. Drawings and design data of the 
following components shall be submitted to substantiate their 
suitability and safety for the service intended:
    (1) Combustion chamber.
    (2) Regenerator or recuperator.
    (3) Casing or piping conveying the gas from the combustion device to 
the gas turbine.
    (h) Fuel systems. Gas turbine fuel systems shall meet the 
requirements of part 56 of this subchapter.
    (i) Fire extinguishing systems. A special local fire extinguishing 
system may be required for gas turbine installations if considered 
necessary by the Commandant. Such a system would be in addition to any 
other required in the compartment in which the gas turbine is located.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6190, Mar. 25, 1972; CGD 73-251, 43 FR 56801, Dec. 4, 1978; CGD 83-
043, 60 FR 24776, May 10, 1995]



    Subpart 58.16--Liquefied Petroleum Gases for Cooking and Heating



Sec. 58.16-1   Scope.

    (a) This subpart prescribes standards for the use of liquefied 
petroleum gas for heating and cooking on inspected vessels, except 
ferries.
    (b) It is the intent of the regulations in this subpart to permit 
liquefied petroleum gas systems of the vapor withdrawal type only. 
Cylinders designed to admit liquid gas into any other part of the system 
are prohibited.
    (c) Except as provided by Sec. 58.16-7(b), all component parts of 
the system, except cylinders, appliances, and low pressure tubing, shall 
be designed to withstand a pressure of 500 pounds per square inch 
without failure.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 83-013, 54 FR 
6402, Feb. 10, 1989]



Sec. 58.16-5   Definition.

    (a) For the purpose of this subpart the term ``liquefied petroleum 
gas'' means any liquefied flammable gas which is composed predominantly 
of hydrocarbons or mixtures of hydrocarbons, such as propane, propylene, 
butane, butylene, or butadiene, and which has a Reid (ASTM-D323. Method 
of test for Vapor Pressure of Petroleum Products (Reid Method)) vapor 
pressure exceeding 40 pounds per square inch absolute at 100 deg. F.



Sec. 58.16-7  Use of liquefied petroleum gas.

    (a) Cooking equipment using liquefied petroleum gas on vessels of 
100 gross tons or more that carry passengers for hire must meet the 
requirements of this subpart.
    (b) Cooking equipment using liquefied petroleum gas on vessels of 
less than 100 gross tons that carry passengers for hire must meet the 
requirements of 46 CFR 25.45-2 or 184.05, as applicable.
    (c) Systems using liquefied petroleum gas for cooking or heating on 
any other vessels subject to inspection by the Coast Guard must meet the 
requirements of this subpart.

[CGD 83-013, 54 FR 6402, Feb. 10, 1989]



Sec. 58.16-10   Approvals.

    (a) Gas appliances. (1) All gas-consuming appliances used for 
cooking and heating shall be of a type approved by the Commandant, and 
shall be tested, listed and labeled by an acceptable laboratory, such 
as:
    (i) The American Gas Association Testing Laboratories.
    (ii) The Marine Department, Underwriters' Laboratories, Inc. 
(formerly Yacht Safety Bureau).
    (2) Continuous-burning pilot flames are prohibited for use on gas 
appliances when installed below the weather deck.
    (3) Printed instructions for proper installation, operation, and 
maintenance of each gas-consuming appliance shall be furnished by the 
manufacturer.
    (b) Cylinders. (1) Cylinders in which liquefied petroleum gas is 
stored and handled shall be constructed, tested, marked, maintained, and 
retested in accordance with the regulations of the Department of 
Transportation.
    (2) All liquefied petroleum gas cylinders in service shall bear a 
test date marking indicating that they have been retested in accordance 
with the

[[Page 252]]

regulations of the Department of Transportation.
    (3) Regardless of the date of the previous test, a cylinder shall be 
rejected for further service when it leaks; when it is weakened 
appreciably by corrosion, denting, bulging or other evidence of rough 
usage; when it has lost more than 5 percent of its tare weight; or when 
it has been involved in a fire.
    (c) Safety relief devices. All safety relief devices where required, 
shall be approved as to type, size, pressure setting, and location, by 
the Bureau of Explosives in conformance with the regulations of the 
Department of Transportation.
    (d) Valves, regulators, and vaporizers. All component parts of the 
system, other than cylinders and low pressure distribution tubing 
between regulators and appliances, shall be tested and approved by and 
bear the label of the Underwriters Laboratories, Inc., or other 
recognized testing laboratory.
    (e) Plan approval. Drawings in triplicate, showing the location and 
installation of all piping, gas-consuming appliances, cylinders, and 
other component parts of the system shall be submitted for approval.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980 June 17, 1970]



Sec. 58.16-15   Valves and safety relief devices.

    (a) Each cylinder shall have a manually operated screw-down shutoff 
valve fitted with a handwheel installed directly at the cylinder outlet.
    (b) All cylinders shall be protected by one or more safety relief 
devices complying with the requirements of Sec. 58.16-10(a). The safety 
relief device shall be a shutoff valve with an integral spring-loaded 
safety relief valve and supplementary fusible plug, the latter designed 
to yield when the cylinder has been emptied of liquid gas by the relief 
valve under conditions of exposure to excessive heat.
    (c) Cylinder valves and safety relief devices shall have direct 
communication with the vapor space of the cylinder.
    (d) In addition to the cylinder valve, a multiple cylinder system 
shall be provided with a two-way positive shutoff manifold valve of the 
manually operated type. The manifold valve shall be so arranged that the 
replacement of empty cylinders can be made without shutting down the 
flow of gas in the system.
    (e) A master packless shutoff valve controlling all burners 
simultaneously shall be installed at the manifold of all gas-consuming 
appliances.



Sec. 58.16-16   Reducing regulators.

    (a) All systems shall be provided with a regulating device so 
adjusted as to release gas to the distribution tubing at a pressure not 
in excess of 18 inches water column, or approximately 10.5 ounces per 
square inch.
    (b) The low pressure side of all regulators shall be protected 
against excessive pressure by means of a suitable relief valve which 
shall be integral with the regulator. The relief valve shall be set to 
start to discharge at a pressure not less than two times and not more 
than three times the delivery pressure.
    (c) All reducing regulators shall be fitted with a pressure gage 
located on the high pressure side of the regulator.



Sec. 58.16-17   Piping and fittings.

    (a) The piping between the cylinders and the appliances shall be 
seamless annealed copper tubing or such other seamless tubing as may be 
approved by the Commandant.
    (b) All high pressure tubing between the cylinders and the 
regulators shall have a minimum wall thickness of 0.049 inch. All low-
pressure tubing between the regulator and appliances shall have a 
minimum wall thickness of 0.032 inch.
    (c) Tubing connecting fittings shall be of the flare type; or 
connections may be soldered or brazed with material having a melting 
point in excess of 1,000 deg. F.



Sec. 58.16-18   Installation.

    (a) Cylinders, regulating and safety equipment. (1) Cylinders, 
regulating and safety equipment shall be installed in a substantially 
constructed and firmly fixed metal enclosure located on or above the 
weather deck. The cylinder enclosure shall have access from the weather 
deck only. The enclosure shall

[[Page 253]]

be provided with top and bottom ventilation consisting of a fresh air 
inlet pipe and an exhaust pipe both entering through the top of the 
cylinder housing. The enclosure shall be constructed so that when the 
access opening is closed, no gas can escape except through the 
ventilation system.
    (2) Cylinders, regulating and safety devices shall be securely 
fastened and supported within the metal enclosure. The cylinders and 
high pressure equipment shall be so mounted as to be readily accessible 
and capable of easy removal for refilling and inspection. The stowage of 
high pressure equipment in the housing shall be such that the cylinder 
valves can be readily operated and the pressure gage dial be easily 
visible. Where possible cylinders shall be mounted in an upright 
position.
    (3) Stowage of unconnected spare cylinders, filled or empty, shall 
comply with the requirements for cylinders.
    (4) All valves, manifolds and regulators shall be securely mounted 
in locations readily accessible for inspection, maintenance and testing, 
and shall be adequately protected.
    (5) Discharge of the safety relief valves shall be vented away from 
the cylinder, and insofar as practicable, upward into the open 
atmosphere, but in all cases so as to prevent impingement of the 
escaping gas onto a cylinder.
    (b) Piping. (1) All piping shall be installed so as to provide 
minimum interior runs and adequate flexibility. The piping at the 
cylinder outlets shall be fitted with flexible metallic connections to 
minimize the effect of cylinder movement on the outlet piping.
    (2) Distribution lines shall be protected from physical damage and 
be readily accessible for inspection. Lines shall be substantially 
secured against vibration by means of soft nonferrous metal clips 
without sharp edges in contact with the tubing. When passing through 
decks or bulkheads, the lines shall be protected by ferrules of 
nonabrasive material. The distribution lines shall be continuous length 
of tubes from the regulator to the shutoff valve at the appliance 
manifold.
    (c) Gas-consuming appliances. All gas-consuming appliances shall be 
permanently and securely fastened in place.
    (d) Electrical. No electrical connections shall be made within the 
cylinder housing.



Sec. 58.16-19   Tests.

    (a) Installation. (1) After installation, the distribution tubing 
shall be tested prior to its connection to the regulator and appliance 
by an air pressure of not less than 5 pounds per square inch.
    (2) After satisfactory completion of the tests prescribed in 
paragraph (a)(1) of this section, the distribution tubing shall be 
connected to the regulator and appliance and the entire system subjected 
to a leak test as required by Sec. 58.16-30(j).
    (b) Periodic. Leak tests as required by Sec. 58.16-30(j) shall be 
conducted at least once each month and at each regular annual or 
biennial inspection. The tests required at monthly intervals shall be 
conducted by a licensed officer of the vessel or qualified personnel 
acceptable to the Officer in Charge, Marine Inspection. The owner, 
master, or person in charge of the vessel shall keep records of such 
tests showing the dates when performed and the name(s) of the person(s) 
and/or company conducting the tests. Such records shall be made 
available to the marine inspector upon request and shall be kept for the 
period of validity of the vessel's current certificate of inspection. 
Where practicable, these records should be kept in or with the vessel's 
logbook.



Sec. 58.16-20   Ventilation of compartments containing gas-consuming appliances.

    (a) Compartments containing gas-consuming appliances which are 
located above the weather deck shall be fitted with at least two natural 
ventilator ducts led from the atmosphere with one extending to the floor 
level and the other extending to the overhead of the compartment. 
Powered ventilation may be used provided the motor is outside the 
compartment.
    (b) Compartments in which gas-consuming appliances are located 
entirely below the weather deck shall be provided with powered 
ventilation of sufficient capacity to effect a change of air at least 
once every 6 minutes. The motor for the powered ventilation shall be 
located outside the compartment.

[[Page 254]]



Sec. 58.16-25   Odorization.

    (a) All liquefied petroleum gases shall be effectively odorized by 
an agent of such character as to indicate positively by a distinctive 
odor, the presence of gas down to concentration in air of not over one-
fifth the lower limit of combustibility.



Sec. 58.16-30   Operating instructions.

    (a) Before opening a cylinder valve, the outlet of the cylinder 
shall be connected tightly to system; and in the case where only a 
single cylinder is used in the system, all appliance valves and pilots 
shall be shut off before the cylinder valve is opened.
    (b) Before opening cylinder valve after connecting it to system, the 
cylinder shall be securely fastened in place.
    (c) When cylinders are not in use their outlet valves shall be kept 
closed.
    (d) Cylinders when exhausted shall have their outlet valves closed.
    (e) Nothing shall be stored in the metal enclosure except liquefied 
petroleum gas cylinders and permanently fastened parts of the system.
    (f) Valve protecting caps, if provided, shall be firmly fixed in 
place on all cylinders not attached to the system. Caps for cylinders in 
use may remain in the cylinder enclosure if rigidly fastened thereto.
    (g) The opening to the cylinder enclosure shall be closed at all 
times except when access is required to change cylinders or maintain 
equipment.
    (h) Close master valve whenever gas-consuming appliance is not in 
use.
    (i) No smoking is permitted in the vicinity of the cylinder 
enclosure when access to enclosure is open.
    (j) Test system for leakage in accordance with the following 
procedure: With appliance valve closed, the master shutoff valve on the 
appliance open, and with one cylinder valve open, note pressure in the 
gage. Close cylinder valve. The pressure should remain constant for at 
least 10 minutes. If the pressure drops, locate leakage by application 
of liquid detergent or soapy water solution at all connections. Never 
use flame to check for leaks. Repeat test for each cylinder in a 
multicylinder system.
    (k) Report any presence of gas odor to:
........................................................................



Sec. 58.16-35   Markings.

    (a) The outside of the cylinder enclosure housing liquefied 
petroleum gas cylinders, valves and regulators shall be marked as 
follows:

          Liquefied Petroleum Gas
          Keep Open Fires Away.
          Operating Instructions
      Inside and In_____________________________________________________

    (b) A durable and permanently legible instruction sign covering safe 
operation and maintenance of the gas-consuming appliance shall be 
installed adjacent to the appliance.
    (c) ``Operating Instructions'' as listed in Sec. 58.16-30 shall be 
framed under glass, or other equivalent, clear, transparent material, in 
plainly visible locations on the outside of the metal enclosure and near 
the most frequently used gas-consuming appliance, so they may be easily 
read.



                 Subpart 58.20--Refrigeration Machinery



Sec. 58.20-1   Scope.

    (a) The regulations in this subpart apply to fixed refrigeration 
systems for air conditioning, refrigerated spaces, cargo spaces, and 
reliquefaction of low temperature cargo installed on vessels.
    (b) The regulations in this subpart shall not apply to small self-
contained units.



Sec. 58.20-5   Design.

    (a) Refrigeration machinery may be accepted for installation 
provided the design, material, and fabrication comply with the 
applicable requirements of the American Bureau of Shipping or other 
recognized classification society. The minimum pressures for design of 
all components shall be those listed for piping in Table 501.2.4 of 
ANSI-B31.5 (Refrigeration Piping). In no case shall pressure components 
be designed for a pressure less than that for which the safety devices 
of the system are set. Pressure vessels will be designed in accordance 
with part 54 of this subchapter.

[[Page 255]]

    (b) For refrigeration systems other than those for reliquefaction of 
cargo, only those refrigerants under Sec. 147.90 of this chapter are 
allowed.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 84-044, 53 FR 7748, Mar. 10, 1988]



Sec. 58.20-10   Pressure relieving devices.

    (a) Each pressure vessel containing refrigerants, which may be 
isolated, shall be protected by a relief valve set to relieve at a 
pressure not exceeding the maximum allowable working pressure of the 
vessel. When a pressure vessel forms an integral part of a system having 
a relief valve, such vessel need not have an individual relief valve.
    (b) Relief valves fitted on the high pressure side may discharge to 
the low pressure side before relieving to atmosphere. When relieving to 
atmosphere, a relief valve shall be fitted in the atmospheric discharge 
connection from the receivers and condensers. The relief valve from the 
receivers may relieve to the condenser which in turn may relieve either 
to the low side or to atmosphere. It shall be set to relieve at a 
pressure not greater than the maximum allowable working pressure. A 
rupture disk may be fitted in series with the relief valve, provided the 
bursting pressure of the rupture disk is not in excess of the relief 
valve set pressure. Where a rupture disk is fitted on the downstream 
side of the relief valve, the relief valve shall be of the type not 
affected by back pressure.



Sec. 58.20-15   Installation of refrigerating machinery.

    (a) Where refrigerating machines are installed in which anhydrous 
ammonia is used as a refrigerant, such machines shall be located in a 
well-ventilated, isolated compartment, preferably on the deck, but in no 
case shall it be permissible to install such machines in the engineroom 
space unless the arrangement is such as to eliminate any hazard from gas 
escaping to the engineroom. Absorption machines using a solution of aqua 
ammonia and machines using carbon dioxide are exempt from this 
requirement, provided the maximum charges that might be released in the 
event of breakage do not exceed 300 pounds.
    (b) Machinery compartments containing equipment for ammonia shall be 
fitted with a sprinkler system providing an effective water spray and 
having a remote control device located outside the compartment.
    (c) All refrigeration compressor spaces shall be effectively 
ventilated and drained and shall be separated from the insulated spaces 
by a waterweight bulkhead, unless otherwise approved.



Sec. 58.20-20   Refrigeration piping.

    (a) All piping materials shall be suitable for handling the primary 
refrigerant, brine, or fluid used, and shall be of such chemical and 
physical properties as to remain ductile at the lowest operating 
temperature.
    (b) Piping systems shall be designed in accordance with ANSI-B31.5. 
Piping used for cargo reliquefaction systems shall also comply with the 
applicable requirements found in low temperature piping, Sec. 56.50-105 
of this subchapter.
    (c) A relief valve shall be fitted on or near the compressor on the 
gas discharge side between the compressor and the first stop valve with 
the discharge therefrom led to the suction side. A check valve shall be 
fitted in the atmospheric discharge line if it is led through the side 
of the vessel below the freeboard deck, or a shutoff valve may be 
employed if it is locked in the open position.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970]



Sec. 58.20-25   Tests.

    (a) All pressure vessels, compressors, piping, and direct expansion 
cooling coils shall be leak tested after installation to their design 
pressures, hydrostatically or pneumatically.
    (b) No pneumatic tests in refrigeration systems aboard ships shall 
be made at pressures exceeding the design pressure of the part of the 
system being tested. Pneumatic tests may be made with the refrigerant in 
the system or if the refrigerant has been removed, oil-pumped dry 
nitrogen or bone dry carbon dioxide with a detectable amount of the 
refrigerant added, should be used as a testing medium. (Carbon dioxide 
should not be used to

[[Page 256]]

leak test an ammonia system.) In no case should air, oxygen, any 
flammable gas or any flammable mixture of gases be used for testing.



                      Subpart 58.25--Steering Gear

    Source: CGD 83-043, 60 FR 24776, May 10, 1995, unless otherwise 
noted



Sec. 58.25-1  Applicability.

    (a) Except as specified otherwise, this subpart applies to--
    (1) Each vessel or installation of steering gear contracted for on 
or after June 9, 1995; and
    (2) Each vessel on an international voyage with an installation of 
steering gear contracted for on or after September 1, 1984.
    (b) Each vessel not on an international voyage with an installation 
of steering gear contracted for before June 9, 1995, and each vessel on 
an international voyage with such an installation contracted for before 
September 1, 1984, may meet either the requirements of this subpart or 
those in effect on the date of the installation.



Sec. 58.25-5  General.

    (a) Definitions.
    Ancillary steering equipment means steering equipment, other than 
the required control systems and power actuating systems, that either is 
not required, such as automatic pilot or non-followup control from the 
pilothouse, or is necessary to perform a specific required function, 
such as the automatic detection and isolation of a defective section of 
a tanker's hydraulic steering gear.
    Auxiliary steering gear means the equipment, other than any part of 
the main steering gear, necessary to steer the vessel in case of failure 
of the main steering gear, not including a tiller, quadrant, or other 
component serving the same purpose. Control system means the equipment 
by which orders for rudder movement are transmitted from the pilothouse 
to the steering-gear power units. A control system for steering gear 
includes, but is not limited to, one or more--
    (1) Transmitters;
    (2) Receivers;
    (3) Feedback devices;
    (4) Hydraulic servo-control pumps, with associated motors and motor 
controllers;
    (5) Differential units, hunting gear, and similar devices;
    (6) All gearing, piping, shafting, cables, circuitry, and ancillary 
devices for controlling the output of power units; and
    (7) Means of bringing steering-gear power units into operation.
    Fast-acting valve, as used in this subpart, means a ball, plug, 
spool, or similar valve with a handle connected for quick manual 
operation.
    Followup control means closed-loop (feedback) control that relates 
the position of the helm to a specific rudder angle by transmitting the 
helm-angle order to the power actuating system and, by means of 
feedback, automatically stopping the rudder when the angle selected by 
the helm is reached.
    Main steering gear means the machinery, including power actuating 
systems, and the means of applying torque to the rudder stock, such as a 
tiller or quadrant, necessary for moving the rudder to steer the vessel 
in normal service.
    Maximum ahead service speed means the greatest speed that a vessel 
is designed to maintain in service at sea at the deepest loadline draft.
    Maximum astern speed means the speed that it is estimated the vessel 
can attain at the maximum designed power astern at the deepest loadline 
draft.
    Power actuating system means the hydraulic equipment for applying 
torque to the rudder stock. It includes, but is not limited to--
    (1) Rudder actuators;
    (2) Steering-gear power units; and
    (3) Pipes, valves, fittings, linkages, and cables for transmitting 
power from the power unit or units to the rudder actuator or actuators.
    Speedily regained, as used in this subpart, refers to the time it 
takes one qualified crewmember, after arriving in the steering-gear 
compartment, and without the use of tools, to respond to a failure of 
the steering gear and take the necessary corrective action.
    Steering capability means steering equivalent to that required of 
auxiliary steering gear by Sec. 58.25-10(c)(2).

[[Page 257]]

    Steering gear means the machinery, including power actuating 
systems, control systems, and ancillary equipment, necessary for moving 
the rudder to steer the vessel.
    Steering-gear power unit means:
    (1) In the case of electric steering gear, an electric motor and its 
associated electrical equipment, including motor controller, disconnect 
switch, and feeder circuit.
    (2) In the case of an electro-hydraulic steering gear, an electric 
motor, connected pump, and associated electrical equipment such as the 
motor controller, disconnect switch, and feeder circuit.
    (3) In the case of hydraulic steering gear, the pump and its prime 
mover.
    Tank vessel, as used in this subpart, means a self-propelled vessel, 
including a chemical tanker or a gas carrier, defined either as a tanker 
by 46 U.S.C. 2101(38) or as a tank vessel by 46 U.S.C. 2101(39).
    (b) Unless it otherwise complies with this subpart, each self-
propelled vessel must be provided with a main steering gear and an 
auxiliary steering gear. These gear must be arranged so that--
    (1) The failure of one will not render the other inoperative; and
    (2) Transfer from the main to the auxiliary can be effected quickly.
    (c) Each substantial replacement of steering-gear components or 
reconfiguration of steering-gear arrangements on an existing vessel must 
comply with the requirements of this subpart for new installations to 
the satisfaction of the cognizant Officer in Charge, Marine Inspection.
    (d) Each non-pressure-containing steering-gear component and each 
rudder stock must be of sound and reliable construction, meet the 
minimum material requirements of Sec. 58.25-75, and be designed to 
standards at least equal to those established by the American Bureau of 
Shipping or other recognized classification society.
    (e) The suitability of any essential steering-gear component not 
duplicated must be specifically approved by the Commanding Officer, 
Marine Safety Center. Where a steering-gear component is shared by--
    (1) A control system (e.g., a control-system transfer switch located 
in the steering-gear compartment);
    (2) The main and auxiliary steering gear (e.g., an isolation valve); 
or
    (3) A power actuating system and its control system (e.g., a 
directional control valve)--the requirements for both systems apply, to 
provide the safest and most reliable arrangement.
    (f) Steering gear must be separate and independent of all other 
shipboard systems, except--
    (1) Electrical switchboards from which they are powered;
    (2) Automatic pilots and similar navigational equipment; and
    (3) Propulsion machinery for an integrated system of propulsion and 
steering.
    (g) Except on a vessel with an integrated system of propulsion and 
steering, no thruster may count as part of a vessel's required steering 
capability.
    (h) Except for a tank vessel subject to Sec. 58.25-85(e), each 
oceangoing vessel required to have power-operated steering gear must be 
provided with arrangements for steadying the rudder both in an emergency 
and during a shift from one steering gear to another. On hydraulic 
steering gear, a suitable arrangement of stop valves in the main piping 
is an acceptable means of steadying the rudder.
    (i) General arrangement plans for the main and auxiliary steering 
gear and their piping must be submitted for approval in accordance with 
subpart 50.20 of this subchapter.



Sec. 58.25-10  Main and auxiliary steering gear.

    (a) Power-operated main and auxiliary steering gear must be separate 
systems that are independent throughout their length. Other systems and 
arrangements of steering gear will be acceptable if the Commanding 
Officer, Marine Safety Center, determines that they comply with, or 
exceed the requirements of, this subpart.
    (b) The main steering gear and rudder stock must be--
    (1) Of adequate strength for and capable of steering the vessel at 
maximum ahead service speed, which must be demonstrated to the 
satisfaction of the

[[Page 258]]

cognizant Officer in Charge, Marine Inspection;
    (2) Capable of moving the rudder from 35 deg. on either side to 
35 deg. on the other with the vessel at its deepest loadline draft and 
running at maximum ahead service speed, and from 35 deg. on either side 
to 30 deg. on the other in not more than 28 seconds under the same 
conditions;
    (3) Operated by power when necessary to comply with paragraph (b)(2) 
of this section or when the diameter of the rudder stock is over 12 
centimeters (4.7 inches) in way of the tiller, excluding strengthening 
for navigation in ice; and
    (4) Designed so that they will not be damaged when operating at 
maximum astern speed; however, this requirement need not be proved by 
trials at maximum astern speed and maximum rudder angle.
    (c) The auxiliary steering gear must be--
    (1) Of adequate strength for and capable of steering the vessel at 
navigable speed and of being brought speedily into action in an 
emergency;
    (2) Capable of moving the rudder from 15 deg. on either side to 
15 deg. on the other in not more than 60 seconds with the vessel at its 
deepest loadline draft and running at one-half maximum ahead service 
speed or 7 knots, whichever is greater; and
    (3) Operated by power when necessary to comply with paragraph (c)(2) 
of this section or when the diameter of the rudder stock is over 23 
centimeters (9 inches) in way of the tiller, excluding strengthening for 
navigation in ice.
    (d) No auxiliary means of steering is required on a double-ended 
ferryboat with independent main steering gear fitted at each end of the 
vessel.
    (e) When the main steering gear includes two or more identical power 
units, no auxiliary steering gear need be fitted, if--
    (1) In a passenger vessel, the main steering gear is capable of 
moving the rudder as required by paragraph (b)(2) of this section while 
any one of the power units is not operating;
    (2) In a cargo vessel, the main steering gear is capable of moving 
the rudder as required by paragraph (b)(2) of this section while all the 
power units are operating;
    (3) In a vessel with an installation completed on or after September 
1, 1984, and on an international voyage, and in any other vessel with an 
installation completed after June 9, 1995, the main steering gear is 
arranged so that, after a single failure in its piping system (if 
hydraulic), or in one of the power units, the defect can be isolated so 
that steering capability can be maintained or speedily regained in less 
than ten minutes; or
    (4) In a vessel with an installation completed before September 1, 
1986, and on an international voyage, with steering gear not complying 
with paragraph (e)(3) of this section, the installed steering gear has a 
proved record of reliability and is in good repair.

    Note.--The place where isolation valves join the piping system, as 
by a flange, constitutes a single-failure point. The valve itself need 
not constitute a single-failure point if it has a double seal to prevent 
substantial loss of fluid under pressure. Means to purge air that enters 
the system as a result of the piping failure must be provided, if 
necessary, so that steering capability can be maintained or speedily 
regained in less than ten minutes.

    (f) In each vessel of 70,000 gross tons or over, the main steering 
gear must have two or more identical power units complying with 
paragraph (e) of this section.



Sec. 58.25-15  Voice communications.

    Each vessel must be provided with a sound-powered telephone system, 
complying with subpart 113.30 of this chapter, to communicate between 
the pilothouse and the steering-gear compartment, unless an alternative 
means of communication between them has been approved by the Commanding 
Officer, Marine Safety Center.



Sec. 58.25-20  Piping for steering gear.

    (a) Pressure piping must comply with subpart 58.30 of this part.
    (b) Relief valves must be fitted in any part of a hydraulic system 
that can be isolated and in which pressure can be generated from the 
power units or from external forces such as wave action. The valves must 
be of adequate size,

[[Page 259]]

and must be set to limit the maximum pressure to which the system may be 
exposed, in accordance with Sec. 56.07-10(b) of this subchapter.
    (c) Each hydraulic system must be provided with--
    (1) Arrangements to maintain the cleanliness of the hydraulic fluid, 
appropriate to the type and design of the hydraulic system; and
    (2) For a vessel on an ocean, coastwise, or Great Lakes voyage, a 
fixed storage tank having sufficient capacity to recharge at least one 
power actuating system including the reservoir. The storage tank must be 
permanently connected by piping so that the hydraulic system can be 
readily recharged from within the steering-gear compartment and must be 
fitted with a device to indicate liquid level that complies with 
Sec. 56.50-90 of this subchapter.
    (d) Neither a split flange nor a flareless fitting of the grip or 
bite type, addressed by Sec. 56.30-25 of this subchapter, may be used in 
hydraulic piping for steering gear.



Sec. 58.25-25  Indicating and alarm systems.

    (a) Indication of the rudder angle must be provided both at the main 
steering station in the pilothouse and in the steering-gear compartment. 
The rudder-angle indicator must be independent of control systems for 
steering gear.
    (b) Each electric-type rudder-angle indicator must comply with 
Sec. 113.40-10 of this chapter and, in accordance with Sec. 112.15-5(h) 
of this chapter, draw its power from the source of emergency power.
    (c) On each vessel of 1,600 gross tons or over, a steering-failure 
alarm must be provided in the pilothouse in accordance with 
Secs. 113.43-3 and 113.43-5 of this chapter.
    (d) An audible and a visible alarm must activate in the pilothouse 
upon--
    (1) Failure of the electric power to the control system of any 
steering gear;
    (2) Failure of that power to the power unit of any steering gear; or
    (3) Occurrence of a low oil level in any oil reservoir of a 
hydraulic, power-operated steering-gear system.
    (e) An audible and a visible alarm must activate in the machinery 
space upon--
    (1) Failure of any phase of a three-phase power supply;
    (2) Overload of any motor described by Sec. 58.25-55(c); or
    (3) Occurrence of a low oil level in any oil reservoir of a 
hydraulic, power-operated steering-gear system.

    Note.--See Sec. 62.50-30(f) of this subchapter regarding extension 
of alarms to the navigating bridge on vessels with periodically 
unattended machinery spaces.

    (f) Each power motor for the main and auxiliary steering gear must 
have a ``motor running'' indicator light in the pilothouse, and in the 
machinery space, that activates when the motor is energized.



Sec. 58.25-30  Automatic restart.

    Each control system for main and auxiliary steering gear and each 
power actuating system must restart automatically when electrical power 
is restored after it has failed.



Sec. 58.25-35  Helm arrangements.

    (a) The arrangement of each steering station, other than in the 
steering-gear compartment, must be such that the helmsman is abaft the 
wheel. The rim of the wheel must be plainly marked with arrows and 
lettering for right and left rudder, or a suitable notice indicating 
these directions must be posted directly in the helmsman's line of 
sight.
    (b) Each steering wheel must turn clockwise for ``right rudder'' and 
counterclockwise for ``left rudder.'' When the vessel is running ahead, 
after clockwise movement of the wheel the vessel's heading must change 
to the right.
    (c) If a lever-type control is provided, it must be installed and 
marked so that its movement clearly indicates both the direction of the 
rudder's movement and, if followup control is also provided, the amount 
of the rudder's movement.
    (d) Markings in the pilothouse must not interfere with the 
helmsman's vision, but must be clearly visible at night.


[[Page 260]]


    Note.--See Sec. 113.40-10 of this chapter for the arrangement of 
rudder-angle indicators at steering stations.



Sec. 58.25-40  Arrangement of the steering-gear compartment.

    (a) The steering-gear compartment must--
    (1) Be readily accessible and, as far as practicable, separated from 
any machinery space;
    (2) Ensure working access to machinery and controls in the 
compartment; and
    (3) Include handrails and either gratings or other non-slip surfaces 
to ensure a safe working environment if hydraulic fluid leaks.

    Note.--Where practicable, all steering gear should be located in the 
steering-gear compartment.

    (b) [Reserved]



Sec. 58.25-45  Buffers.

    For each vessel on an ocean, coastwise, or Great Lakes voyage, 
steering gear other than hydraulic must be designed with suitable 
buffering arrangements to relieve the gear from shocks to the rudder.



Sec. 58.25-50  Rudder stops.

    (a) Power-operated steering gear must have arrangements for cutting 
off power to the gear before the rudder reaches the stops. These 
arrangements must be synchronized with the rudder stock or with the gear 
itself rather than be within the control system for the steering gear, 
and must work by limit switches that interrupt output of the control 
system or by other means acceptable to the Commanding Officer, Marine 
Safety Center.
    (b) Strong and effective structural rudder stops must be fitted; 
except that, where adequate positive stops are provided within the 
steering gear, such structural stops need not be fitted.



Sec. 58.25-55  Overcurrent protection for steering-gear systems.

    (a) Each feeder circuit for steering must be protected by a circuit 
breaker on the switchboard that supplies it and must have an 
instantaneous trip set at a current of at least--
    (1) 300% and not more than 375% of the rated full-load current of 
one steering-gear motor for a direct-current motor; or
    (2) 175% and not more than 200% of the locked-rotor current of one 
steering-gear motor for an alternating-current motor.
    (b) No feeder circuit for steering may have any overcurrent 
protection, except that required by paragraph (a) of this section.
    (c) Neither a main or an auxiliary steering-gear motor, nor a motor 
for a steering-gear control system, may be protected by an overload 
protective device. The motor must have a device that activates an 
audible and a visible alarm at the main machinery-control station if 
there is an overload that would cause overheating of the motor.
    (d) No control circuit of a motor controller, steering-gear control 
system, or indicating or alarm system may have overcurrent protection 
except short-circuit protection that is instantaneous and rated at 400% 
to 500% of--
    (1) The current-carrying capacity of the conductor; or
    (2) The normal load of the system.
    (e) The short-circuit protective device for each steering-gear 
control system must be in the steering-gear compartment and in the 
control circuit immediately following the disconnect switch for the 
system.
    (f) When, in a vessel of less than 1,600 gross tons, an auxiliary 
steering gear, which Sec. 58.25-10(c)(3) requires to be operated by 
power, is not operated by electric power or is operated by an electric 
motor primarily intended for other service, the main steering gear may 
be fed by one circuit from the main switchboard. When such an electric 
motor is arranged to operate an auxiliary steering gear, neither 
Sec. 58.25-25(e) nor paragraphs (a) through (c) of this section need be 
complied with if both the overcurrent protection and compliance with 
Secs. 58.25-25(d), 58.25-30, and 58.25-70 (j) and (k) satisfy the 
Commanding Officer, Marine Safety Center.



Sec. 58.25-60  Non-duplicated hydraulic rudder actuators.

    Non-duplicated hydraulic rudder actuators may be installed in the 
steering-gear control systems on each vessel of less than 100,000 
deadweight tons.

[[Page 261]]

These actuators must meet IMO Assembly Resolution A.467(XII), Guidelines 
for Acceptance of Non-Duplicated Rudder Actuators for Tankers, Chemical 
Tankers, and Gas Carriers of 10,000 Tons Gross Tonnage and Above But 
Less Than 100,000 Tonnes Deadweight, 1981, and be acceptable to the 
Commanding Officer, Marine Safety Center. Also, the piping for the main 
gear must comply with Sec. 58.25-10(e)(3).



Sec. 58.25-65  Feeder circuits.

    (a) Each vessel with one or more electric-driven steering-gear power 
units must have at least two feeder circuits, which must be separated as 
widely as practicable. One or more of these circuits must be supplied 
from the vessel's service switchboard. On a vessel where the rudder 
stock is over 23 centimeters (9 inches) in diameter in way of the 
tiller, excluding strengthening for navigation in ice, and where a final 
source of emergency power is required by Sec. 112.05-5(a) of this 
chapter, one or more of these circuits must be supplied from the 
emergency switchboard, or from an alternative source of power that--
    (1) Is available automatically within 45 seconds of loss of power 
from the vessel's service switchboard;
    (2) Comes from an independent source of power in the steering-gear 
compartment;
    (3) Is used for no other purpose; and
    (4) Has a capacity for one half-hour of continuous operation, to 
move the rudder from 15 deg. on either side to 15 deg. on the other in 
not more than 60 seconds with the vessel at its deepest loadline draft 
and running at one-half maximum ahead service speed or 7 knots, 
whichever is greater.
    (b) Each vessel that has a steering gear with multiple electric-
driven power units must be arranged so that each power unit is supplied 
by a separate feeder.
    (c) Each feeder circuit must have a disconnect switch in the 
steering-gear compartment.
    (d) Each feeder circuit must have a current-carrying capacity of--
    (1) 125% of the rated full-load current rating of the electric 
steering-gear motor or power unit; and
    (2) 100% of the normal current of one steering-gear control system 
including all associated motors.



Sec. 58.25-70  Steering-gear control systems.

    (a) Each power-driven steering-gear system must be provided with at 
least one steering-gear control system.
    (b) The main steering gear must be operable from the pilothouse by 
mechanical, hydraulic, electrical, or other means acceptable to the 
Commanding Officer, Marine Safety Center. This gear and its components 
must give full followup control of the rudder. Supplementary steering-
gear control not giving full followup may also be provided from the 
pilothouse.
    (c) Each steering-gear control system must have in the pilothouse a 
switch arranged so that one operation of the switch's lever 
automatically supplies power to a complete system and its associated 
power unit or units. This switch must be--
    (1) Operated by one lever;
    (2) Arranged so that not more than one control system and its 
associated power unit or units can be energized from the pilothouse at 
any one time;
    (3) Arranged so that the lever passes through ``off'' during 
transfer of control from one control system to another; and
    (4) Arranged so that the switches for each control system are in 
separate enclosures or are separated by fire-resistant barriers.
    (d) Each steering-gear control system must receive its power from--
    (1) The feeder circuit supplying power to its steering-gear power 
unit or units in the steering-gear compartment; or
    (2) A direct connection to the busbars supplying the circuit for its 
steering-gear power unit or units from a point on the switchboard 
adjacent to that supply.
    (e) Each steering-gear control system must have a switch that--
    (1) Is in the steering-gear compartment; and
    (2) Disconnects the system from its power source and from the 
steering gear that the system serves.
    (f) Each motor controller for a steering gear must be in the 
steering-gear compartment.

[[Page 262]]

    (g) A means of starting and stopping each motor for a steering gear 
must be in the steering-gear compartment.
    (h) When the main steering gear is arranged in accordance with 
Sec. 58.25-10(e), two separate and independent systems for full followup 
control must be provided in the pilothouse; except that--
    (1) The steering wheel or lever need not be duplicated; and
    (2) If the system consists of a hydraulic telemotor, no second 
separate and independent system need be provided other than on each tank 
vessel subject to Sec. 58.25-85.
    (i) When only the main steering gear is power-driven, two separate 
and independent systems for full followup control must be provided in 
the pilothouse; except that the steering wheel or lever need not be 
duplicated.
    (j) When the auxiliary steering gear is power-driven, a control 
system for the auxiliary steering gear must be provided in the 
pilothouse that is separate and independent from the control system for 
the main steering gear; except that the steering wheel or lever need not 
be duplicated.
    (k) On a vessel of 500 gross tons or above, each main steering gear 
and auxiliary steering gear must be arranged so that its power unit or 
units are operable by controls from the steering-gear compartment. These 
controls must not be rendered inoperable by failure of the controls in 
the pilothouse.



Sec. 58.25-75  Materials.

    (a) Materials used for the mechanical or hydraulic transmission of 
power to the rudder stock must have an elongation of at least 15% in 5 
centimeters (2 inches); otherwise, components used for this purpose must 
be shock-tested in accordance with subpart 58.30 of this part.
    (b) No materials with low melting-points, including such materials 
as aluminum and nonmetallic seals, may be used in control systems for 
steering gear or in power actuating systems unless--
    (1) The materials are within a compartment having little or no risk 
of fire;
    (2) Because of redundancy in the system, damage by fire to any 
component would not prevent immediate restoration of steering 
capability; or
    (3) The materials are within a steering-gear power actuating system.



Sec. 58.25-80  Automatic pilots and ancillary steering gear.

    (a) Automatic pilots and ancillary steering gear, and steering-gear 
control systems, must be arranged to allow immediate resumption of 
manual operation of the steering-gear control system required in the 
pilothouse. A switch must be provided, at the primary steering position 
in the pilothouse, to completely disconnect the automatic equipment from 
the steering-gear controls.
    (b) Automatic pilots and ancillary steering gear must be arranged so 
that no single failure affects proper operation and independence of the 
main or auxiliary steering gear, required controls, rudder-angle 
indicators, or steering-failure alarm.



Sec. 58.25-85  Special requirements for tank vessels.

    (a) Each tank vessel must meet the applicable requirements of 
Secs. 58.25-1 through 58.25-80.
    (b) On each tank vessel of 10,000 gross tons or over, the main 
steering gear must comprise two or more identical power units that 
comply with Sec. 58.25-10(e)(2).
    (c) Each tank vessel of 10,000 gross tons or over constructed on or 
after September 1, 1984, must comply with the following:
    (1) The main steering gear must be arranged so that, in case of loss 
of steering capability due to a single failure in any part of the power 
actuating system of the main steering gear, excluding seizure of a 
rudder actuator or failure of the tiller, quadrant, or components 
serving the same purpose, steering capability can be regained not more 
than 45 seconds after the loss of one power actuating system.
    (2) The main steering gear must include either--
    (i) Two separate and independent power actuating systems, complying 
with Sec. 58.25-10(b)(2); or

[[Page 263]]

    (ii) At least two identical hydraulic-power actuating systems, 
which, acting simultaneously in normal operation, must comply with 
Sec. 58.25-10(b)(2). (When they must so comply, these systems must be 
connected. Loss of hydraulic fluid from one system must be capable of 
being detected, and the defective system automatically isolated, so the 
other system or systems remain fully operational.)
    (3) Steering gear other than hydraulic must meet equivalent 
standards to the satisfaction of the Commanding Officer, Marine Safety 
Center.
    (d) On each tank vessel of 10,000 gross tons or over, but less than 
100,000 deadweight tons, the main steering gear need not comply with 
paragraph (c) of this section if the rudder actuator or actuators 
installed are non-duplicated hydraulic and if--
    (1) The actuators comply with Sec. 58.25-60; and
    (2) In case of loss of steering capability due to a single failure 
either of any part of the piping systems or in one of the power units, 
steering capability can be regained in not more than 45 seconds.
    (e) On each tank vessel of less than 70,000 deadweight tons, 
constructed before, and with a steering-gear installation before, 
September 1, 1986, and on an international voyage, the steering gear not 
complying with paragraph (c) (1), (2), or (3) of this section, as 
applicable, may continue in service if the steering gear has a proved 
record of reliability and is in good repair.
    (f) Each tank vessel of 10,000 gross tons or over, constructed 
before, and with a steering-gear installation before, September 1, 1984, 
must--
    (1) Meet the applicable requirements in Secs. 58.25-15, 58.25-20(c), 
58.25-25 (a), (d), and (e), and 58.25-70 (e), (h), (i), and (j);
    (2) Ensure working access to machinery and controls in the steering-
gear compartment (which must include handrails and either gratings or 
other non-slip surfaces to ensure a safe working environment in case 
hydraulic fluid leaks);
    (3) Have two separate and independent steering-gear control systems, 
each of which can be operated from the pilothouse; except that it need 
not have separate steering wheels or steering levers;
    (4) Arrange each system required by paragraph (f)(3) of this section 
so that, if the one in operation fails, the other can be operated from 
the pilothouse immediately; and
    (5) Supply each system required by paragraph (f)(3) of this section, 
if electric, with power by a circuit that is--
    (i) Used for no other purpose; and either--
    (ii) Connected in the steering-gear compartment to the circuit 
supplying power to the power unit or units operated by that system; or
    (iii) Connected directly to the busbars supplying the circuit for 
its steering-gear power unit or units at a point on the switchboard 
adjacent to that supply.
    (g) Each tank vessel of 40,000 gross tons or over, constructed 
before, and with a steering-gear installation before, September 1, 1984, 
and on an international voyage, must have the steering gear arranged so 
that, in case of a single failure of the piping or of one of the power 
units, either steering capability equivalent to that required of the 
auxiliary steering gear by Sec. 58.25-10(c)(2) can be maintained or the 
rudder's movement can be limited so that steering capability can be 
speedily regained in less than 10 minutes. This arrangement must be 
achieved by--
    (1) An independent means of restraining the rudder;
    (2) Fast-acting valves that may be manually operated to isolate the 
actuator or actuators from the external hydraulic piping, together with 
a means of directly refilling the actuators by a fixed, independent, 
power-operated pump and piping; or
    (3) An arrangement such that, if hydraulic-power actuating systems 
are connected, loss of hydraulic fluid from one system must be detected 
and the defective system isolated either automatically or from within 
the pilothouse so that the other system remains fully operational.

    Note.--The term ``piping or * * * one of the power units'' in 
paragraph (g) of this section refers to the pressure-containing 
components in hydraulic or electro-hydraulic steering gear. It does not 
include rudder actuators or hydraulic-control servo piping and

[[Page 264]]

pumps used to stroke the pump or valves of the power unit, unless their 
failure would result in failure of the unit or of the piping to the 
actuator.



             Subpart 58.30--Fluid Power and Control Systems



Sec. 58.30-1   Scope.

    (a) This subpart contains requirements for fluid power transmission 
and control systems and appurtenances. Except as otherwise provided for 
in this section, these requirements are applicable to the following 
fluid power and control systems:
    (1) Steering apparatus, main and auxiliary, including bow thruster 
systems.
    (2) Cargo hatch operating systems unless fitted with an alternate 
mechanical means of operation and approved by the Commandant as 
hydraulically or pneumatically fail-safe. A system is considered to be 
fail-safe if a component failure will result in a slow and controlled 
release of the loading so as not to endanger personnel.
    (3) Watertight door operating system.
    (4) Automatic propulsion boiler system.
    (5) Starting systems for internal combustion engines used for main 
propulsion, main or auxiliary power, as the prime mover for any required 
emergency apparatus, or as the source of propulsion power in ship 
maneuvering thruster systems.
    (6) Centralized control system of main propulsion and auxiliary 
machinery.
    (7) Lifeboat handling equipment.
    (8) Controllable pitch propeller system.
    (9) Installations used to remotely control components of piping 
systems listed in Sec. 56.01-10(c)(1) of this subchapter.
    (10) All systems containing a pneumatic or hydropneumatic 
accumulator. In the case of hydropneumatic accumulators where it can be 
shown to the satisfaction of the Commandant that due to friction losses, 
constriction, or other design features, the hazard of explosive rupture 
does not exist downstream of a certain point in the hydraulic system, 
the requirements of this subpart will apply only to the accumulator and 
the system upstream of this point.
    (11) Materials and/or personnel handling equipment systems, i.e. 
cranes, hydraulic elevators, etc., not approved by the Commandant as 
fail-safe as defined in paragraph (a)(2) of this section.
    (12) Any fluid power or control system installed in the cargo area 
of pump rooms on a tank vessel, or in spaces in which cargo is handled 
on a liquefied flammable gas carrier.
    (13) All pneumatic power and control systems having a maximum 
allowable working pressure in excess of 150 pounds per square inch.
    (14) Any other hydraulic or pneumatic system on board that, in the 
judgment of the Commandant, constitutes a hazard to the seaworthiness of 
the ship or the safety of personnel either in normal operation or in 
case of failure.
    (b) Other fluid power and control systems do not have to comply with 
the detailed requirements of this subpart but must meet the requirements 
of Sec. 58.30-50.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40168, Sept. 2, 1975]



Sec. 58.30-5   Design requirements.

    (a) The requirements of part 56 are also applicable to piping and 
fittings in fluid power and control systems listed in Sec. 58.30-1 of 
this part, except as modified herein. The designer should consider the 
additional pressure due to hydraulic shock and should also consider the 
rate of pressure rise caused by hydraulic shock.
    (b) The system shall be so designed that proper functioning of any 
unit shall not be affected by the back pressure in the system. The 
design shall be such that malfunctioning of any unit in the system will 
not render any other connected or emergency system inoperative because 
of back pressure.
    (c) Pneumatic systems with a maximum allowable working pressure in 
excess of 150 pounds per square inch shall be designed with a surge tank 
or other acceptable means of pulsation dampening.

[[Page 265]]

    (d) Each pneumatic system must minimize the entry of oil into the 
system and must drain the system of liquids.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 73-254, 40 FR 40168, Sept. 2, 1975; CGD 83-
043, 60 FR 24781, May 10, 1995; CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 58.30-10   Hydraulic fluid.

    (a) The requirements of this section are applicable to all fluid 
power transmission and control systems installed on vessels subject to 
inspection.
    (b) The fluid used in hydraulic power transmission systems shall 
have a flashpoint of not less than 200 deg. F. for pressures below 150 
pounds per square inch and 315 deg. F. for pressures 150 pounds per 
square inch and above, as determined by ASTM D92-57, Cleveland ``Open 
Cup'' test method.
    (c) The chemical and physical properties of the hydraulic fluid 
shall be suitable for use with any materials in the system or components 
thereof.
    (d) The hydraulic fluid shall be suitable for operation of the 
hydraulic system through the entire temperature range to which it may be 
subjected in service.
    (e) The recommendations of the system component manufacturers and 
ANSI-B93.5 (Recommended Practice for the Use of Fire Resistant Fluids 
for Fluid Power Systems) shall be considered in the selection and use of 
hydraulic fluid.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970]



Sec. 58.30-15   Pipe, tubing, valves, fittings, pumps, and motors.

    (a) The requirements of this section are applicable to those 
hydraulic and pneumatic systems listed in Sec. 58.30-1.
    (b) Materials used in the manufacture of tubing, pipes, valves, 
flanges, and fittings shall be selected from those specifications which 
appear in Table 56.60-1(a) or Table 56.60-2(a) of this subchapter; or 
they may be selected from the material specifications of sections I, 
III, and VIII of the ASME Code if not prohibited by the section of this 
subchapter dealing with the particular section of the ASME Code. 
Materials designated by other specifications shall be evaluated on the 
basis of physical and chemical properties. To assure these properties, 
the specifications shall specify and require such physical and chemical 
testing as considered necessary by the Commandant. All tubing and pipe 
materials shall be suitable for handling the hydraulic fluid used and 
shall be of such chemical and physical properties as to remain ductile 
at the lowest operating temperature.
    (c) Bolting shall meet the requirements of Sec. 56.25-20 of this 
subchapter except that regular hexagon bolts conforming to SAE J429, 
grades 2 through 8, or ASTM A-193 may be used in sizes not exceeding 11/
2 inches.
    (d) The maximum allowable working pressure and minimum thickness 
shall be calculated as required by Sec. 56.07-10(e) of this subchapter 
when the outside diameter to wall thickness ratio is greater than 6. 
Where the ratio is less than 6, the wall thickness may be established on 
the basis of an applicable thick-wall cylinder equation acceptable to 
the Commandant using the allowable stress values specified in 
Sec. 56.07-10(e) of this subchapter.
    (e) All flared, flareless and compression type joints shall be in 
accordance with Sec. 56.30-25 of this subchapter.
    (f) Fluid power motors and pumps installed on vessels subject to 
inspection shall be certified by the manufacturer as suitable for the 
intended use. Such suitability shall be demonstrated by operational 
tests conducted aboard the vessel which shall be witnessed by a marine 
inspector.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40168, Sept. 2, 1975; CGD 95-027, 61 FR 26001, May 23, 1996]



Sec. 58.30-20   Fluid power hose and fittings.

    (a) The requirements of this section are applicable to those 
hydraulic and pneumatic systems listed in Sec. 58.30-1.
    (b) Hose and fittings shall meet the requirements of subpart 56.60 
of this subchapter.
    (c) Hose assemblies may be installed between two points of relative 
motion but shall not be subjected to torsional deflection (twisting) 
under any conditions of operation and shall be limited,

[[Page 266]]

in general, to reasonable lengths required for flexibility. Special 
consideration may be given to the use of longer lengths of flexible hose 
where required for proper operation of machinery and components in the 
hydraulic system.
    (d) Sharp bends in hoses shall be avoided.



Sec. 58.30-25   Accumulators.

    (a) An accumulator is an unfired pressure vessel in which energy is 
stored under high pressure in the form of a gas or a gas and hydraulic 
fluid. Accumulators must meet the applicable requirements in Sec. 54.01-
5 (c)(3), (c)(4), and (d) of this chapter or the remaining requirements 
in part 54.
    (b) If the accumulator is of the gas and fluid type, suitable 
separators shall be provided between the two media, if their mixture 
would be dangerous, or would result in contamination of the hydraulic 
fluid and loss of gas through absorption.
    (c) Each accumulator which may be isolated, shall be protected on 
the gas and fluid sides by relief valves set to relieve at pressures not 
exceeding the maximum allowable working pressures. When an accumulator 
forms an integral part of systems having relief valves, the accumulator 
need not have individual relief valves.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968 as amended by CGD 77-147, 47 FR 
21811, May 20, 1982]



Sec. 58.30-30   Fluid power cylinders.

    (a) The requirements of this section are applicable to those 
hydraulic and pneumatic systems listed in Sec. 58.30-1 and to all 
pneumatic power transmission systems.
    (b) Fluid power cylinders consisting of a container and a movable 
piston rod extending through the containment vessel, not storing energy 
but converting a pressure to work, are not considered to be pressure 
vessels and need not be constructed under the provisions of part 54 of 
this subchapter.
    (c) Cylinders shall be designed for a bursting pressure of not less 
than 4 times the maximum allowable working pressure. Drawings and 
calculations or a certified burst test report shall be submitted to show 
compliance with this requirement.
    (d) Piston rods, except steering gear rams, shall either be of 
corrosion resistant material or shall be of steel protected by a plating 
system acceptable to the Commandant.
    (e) Materials selection shall be in accordance with the requirements 
of Sec. 58.30-15(b).



Sec. 58.30-35   Testing.

    (a) All fluid power and control systems and components thereof shall 
be tested as required by this section.
    (b) Accumulators constructed as pressure vessels under the 
provisions of part 54 of this subchapter shall be tested and retested as 
required by parts 54 and 61 of this subchapter.
    (c) Fluid power and control systems and piping assemblies shall be 
given an installation test as follows:
    (1) Fluid power and control systems and piping assemblies and 
associated equipment components, including hydraulic steering gear, in 
lieu of being tested at the time of installation, may be shop tested by 
the manufacturer to 1\1/2\ times the maximum allowable pressure of the 
system. The required test pressure shall be maintained for a sufficient 
amount of time to check all components for strength and porosity and to 
permit an inspection to be made of all connections.
    (2) Fluid power and control systems and associated hydraulic 
equipment components which have been tested in conformance with 
paragraph (c)(1) of this section and so certified by the manufacturer, 
may be tested after installation as a complete assembly by stalling the 
driven unit in a safe and satisfactory manner and by blowing the relief 
valves. Otherwise, these systems shall be hydrostatically tested in the 
presence of a marine inspector at a pressure of 1\1/2\ times the maximum 
allowable pressure.
    (3) Fluid power and control systems incorporating hydropneumatic 
accumulators containing rupture discs may be tested at the maximum 
allowable working pressure of the system in lieu of 1\1/2\ times this 
value as prescribed in paragraphs (c)(1) and (2) of this section 
provided the accumulators have been previously tested in accordance with

[[Page 267]]

paragraph (b) of this section and welded or brazed piping joints are not 
employed in the system. If welded or brazed joints are employed, the 
system shall be tested in accordance with the requirements of paragraphs 
(c)(1) and (2) of this section except that the accumulators may be 
isolated from the remainder of the system.
    (d) Fluid power and control systems shall be purged with an inert 
gas or with the working fluid and all trapped air bled from the system 
prior to any shipboard testing. In no case shall air, oxygen, any 
flammable gas, or any flammable mixture of gases be used for testing 
fluid power systems.
    (e) Fluid control systems, such as boiler combustion controls, 
containing components with internal parts, such as bellows or other 
sensing elements, which would be damaged by the test pressure prescribed 
in paragraphs (c) (1) and (2) of this section may be tested at the 
maximum allowable working pressure of the system. In addition, all fluid 
control systems may be tested using the system working fluid.



Sec. 58.30-40   Plans.

    (a) Diagrammatic plans and lists of materials must be submitted for 
each of the fluid power and control systems listed in Sec. 58.30-1(a) 
that is installed on the vessel. Plan submission must be in accordance 
with subpart 50.20 of this subchapter and must include the following:
    (1) The purpose of the system.
    (2) Its location on the vessel.
    (3) The maximum allowable working pressure.
    (4) The fluid used in the system.
    (5) The velocity of the fluid flow in the system.
    (6) Details of the system components in accordance with Sec. 56.01-
10(d) of this subchapter.

[CGD 73-254, 40 FR 40168, Sept. 2, 1975]



Sec. 58.30-50   Requirements for miscellaneous fluid power and control systems.

    (a) All fluid power and control systems installed on a vessel, 
except those listed in Sec. 58.30-1(a), must meet the following 
requirements:
    (1) Diagrams of the system providing the information required by 
Sec. 58.30-40(a)(1) through (4) must be submitted. These are not 
approved but are needed for records and for evaluation of the system in 
accordance with Sec. 58.30-1(a)(14).
    (2) The hydraulic fluid used in the system must comply with 
Sec. 58.30-10.
    (3) The installed system must be tested in accordance with 
Sec. 58.30-35(c)(2).
    (4) All pneumatic cylinders must comply with Sec. 58.30-30.
    (5) Additional plans may be required for ``fail-safe'' equipment and 
for cargo hatch systems with alternate means of operation.

[CGD 73-254, 40 FR 40168, Sept. 2, 1975]



                  Subpart 58.50--Independent Fuel Tanks



Sec. 58.50-1   General requirements.

    (a) The regulations in this subpart contain requirements for 
independent fuel tanks.
    (b) Passenger vessels exceeding 100 gross tons constructed prior to 
July 1, 1935, may carry gasoline as fuel not exceeding 40 gallons to 
supply the emergency electrical system. Passenger vessels exceeding 100 
gross tons constructed on or after July 1, 1935, and all emergency 
systems converted on or after July 1, 1935, shall use fuel which has a 
flashpoint exceeding 110 deg. F. (PMCC) for internal combustion engine 
units. Such vessels shall carry a sufficient quantity of fuel to supply 
the emergency electrical system. Refer to Sec. 112.05-5 of Subchapter J 
(Electrical Engineering), of this chapter.
    (c) An outage of 2 percent shall be provided on all fuel tanks 
containing petroleum products.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGD 73-254, 40 FR 
40169, Sept. 2, 1975]



Sec. 58.50-5   Gasoline fuel tanks.

    (a) Construction. (1) Shape. Tanks may be of either cylindrical or 
rectangular form, except that tanks for emergency electrical systems 
shall be of cylindrical form.
    (2) Materials and construction. The material used and the minimum 
thickness allowed shall be as indicated in Table 58.50-5(a) except that 
consideration will be given to other materials

[[Page 268]]

which provide equivalent safety as indicated in Sec. 58.50-15.
    (3) Prohibited types. Tanks with flanged-up top edges that may trap 
and hold moisture shall not be used.
    (4) Openings. Openings for fill, vent and fuel pipes, and openings 
for fuel level gages where used, shall be on the topmost surface of 
tanks. Tanks shall have no openings in bottoms, sides, or ends, except 
that an opening fitted with threaded plug or cap may be used for tank 
cleaning purposes.

                                                Table 58.50-5(a)                                                
----------------------------------------------------------------------------------------------------------------
                                                           Thickness in inches and gage numbers\1\ vs. tank     
                                                                           capacities for--                     
                                       A.S.T.M.      -----------------------------------------------------------
            Material                 specification                         More than 80- and                    
                                   (latest edition)      1-through 80-    not more than 150-    Over 150-gallon 
                                                         gallon tanks        gallon tanks          tanks\2\     
----------------------------------------------------------------------------------------------------------------
Aluminum\5\.....................  B 209, Alloy        0.250 (USSG 3)....  0.250 (USSG 3)....  0.250 (USSG 3).   
                                   5086\6\.                                                                     
Nickle-copper...................  B127, Hot rolled    0.037 (USSG 20)\3\  0.050 (USSG 18)...  0.107 (USSG 12).  
                                   sheet or plate.                                                              
Copper-nickel...................  B122, Alloy No. 5.  0.045 (AWG 17)....  0.057 (AWG 15)....  0.128 (AWG 8).    
Copper..........................  B152, Type ETP....  0.057(AWG 15).....  0.080 (AWG 12)....  0.182 (AWG 5).    
Copper-silicon..................  B97, Alloys A, B,   0.050 (AWG 16)....  0.064 (AWG 14)....  0.144 (AWG 7).    
                                   and C.                                                                       
Steel or iron\4\................  ..................  0.0747 (MfgStd 14)  0.1046 (MfgStd 12)  0.179 (MfgStd 7). 
----------------------------------------------------------------------------------------------------------------
\1\Gages used are U.S. standard ``USSG'' for nickel-copper; ``AWG'' for copper, copper-nickel and copper-silicon
  ``MFR's STD'' for steel.                                                                                      
\2\Tanks over 400 gallons shall be designed with a factor of safety of four on the ultimate strength of the     
  material used with a design head of not less than 4 feet of liquid above the top of the tank.                 
\3\Nickel-copper not less than 0.031 inch (USSG 22) may be used for tanks up to 30-gallon capacity.             
\4\Fuel tanks constructed of iron or steel, which is less than 3/16-inch thick shall be galvanized inside and   
  outside by the hot dip process.                                                                               
\5\Anodic to most common metals. Avoid dissimilar metal contact with tank body.                                 
\6\And other alloys acceptable to the Commandant.                                                               

    (5) Joints. All metallic tank joints shall be welded or brazed.
    (6) Fittings. Nozzles, flanges, or other fittings for pipe 
connections shall be welded or brazed to the tank. The tank openings in 
way of pipe connections shall be properly reinforced where necessary. 
Where fuel level gages are used, the flange to which gage fittings are 
attached shall be welded or brazed to the tank. No tubular gage glasses 
or trycocks shall be fitted to the tanks.
    (7) Baffle plates. All tanks exceeding 30 inches in any horizontal 
dimension shall be fitted with vertical baffle plates where necessary 
for strength or for control of excessive surge. In general, baffle 
plates installed at intervals not exceeding 30 inches will be considered 
as meeting this requirement.
    (8) Baffle plate details. Baffle plates, where required, shall be of 
the same material and not less than the minimum thickness required in 
the tank walls and shall be connected to the tank walls by welding or 
brazing. Limber holes at the bottom and air holes at the top of all 
baffles shall be provided.
    (b) Installation. (1) Gasoline fuel tanks used for propulsion shall 
be located in water-tight compartments separate from, but adjacent to 
the engineroom or machinery space. Fuel tanks for auxiliaries shall be 
located on or above the weather deck outside of the engine housing or 
compartment and as close to the engine as practicable. All tanks shall 
be so installed as to provide a free circulation of air around the 
tanks.
    (2) Cylindrical tanks with longitudinal seams shall be arranged 
horizontally where practicable so that such seams are located as near 
the top as possible.
    (3) Fuel tanks shall be so installed as to permit examination, 
testing, or removal for cleaning.
    (4) Fuel tanks shall be adequately supported and braced to prevent 
movement. Portable fuel tanks are not permitted.
    (5) All fuel tanks shall be electrically bonded to the common 
ground.
    (c) Testing. (1) Prior to installation, tanks vented to atmosphere 
shall be tested to, and must withstand, a pressure of 5 pounds per 
square inch or 1\1/2\ times the maximum head to which they may be 
subjected in service, whichever is greater. A standpipe of 11\1/2\ feet 
in height attached to the tank may be filled with water to accomplish

[[Page 269]]

the 5 pounds per square inch test. Permanent deformation of the tank 
will not be cause for rejection unless accompanied by leakage.
    (2) After installation of the fuel tank on a vessel the complete 
installation shall be tested in the presence of a marine inspector to a 
head not less than that to which the tank may be subjected in service. 
Fuel may be used as a testing medium.
    (3) All tanks not vented to atmosphere shall be constructed and 
tested in accordance with part 54 of this subchapter.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 72-59R, 37 
FR 6190, Mar. 25, 1972]



Sec. 58.50-10   Diesel fuel tanks.

    (a) Construction. (1) Tanks may be of either cylindrical or 
rectangular form.
    (2) The materials used and the minimum thickness allowed in the 
construction of independent fuel tanks shall be as indicated in Table 
58.50-10(a), except that consideration will be given to other materials 
which provide equivalent safety as indicated in Sec. 58.50-15.
    (3) Tanks with flanged-up top edges, that may trap and hold 
moisture, shall not be used.

                                                Table 58.50-10(a)                                               
----------------------------------------------------------------------------------------------------------------
                                                           Thickness in inches and gage numbers\1\ vs. tank     
                                                                           capacities for--                     
                                       A.S.T.M.      -----------------------------------------------------------
            Material                 specification                         More than 80- and                    
                                   (latest edition)     1- through 80-    not more than 150-    Over 150-gallon 
                                                         gallon tanks        gallon tanks          tanks\2\     
----------------------------------------------------------------------------------------------------------------
Aluminum\5\.....................  B209, Alloy         0.250 (USSG 3)....  0.250 (USSG 3)....  0.250 (USSG 3).   
                                   5086\6\.                                                                     
Nickel-copper...................  B127, Hot rolled    0.037 (USSG 20)\3\  0.050 (USSG 18)...  0.107 (USSG 12).  
                                   sheet or plate.                                                              
Steel or iron\4\................  ..................  0.0747 (MfgStd 14)  0.1046 (MfgStd 12)  0.179 (MfgStd 7). 
----------------------------------------------------------------------------------------------------------------
\1\Gages used are U.S. standard ``USSG'' for nickel-copper and ``MfgStd'' for steel or iron.                    
\2\Tanks over 400 gallons shall be designed with a factor of safety of four on the ultimate strength of the     
  material used with design head of not less than 4 feet of liquid above the top of the tank.                   
\3\Nickel-copper not less than 0.031 inch (USSG 22) may be used for tanks up to 30-gallon capacity.             
\4\For diesel tanks the steel or iron shall not be galvanized on the interior.                                  
\5\Anodic to most common metals. Avoid dissimilar metal contact with tank body.                                 
\6\And other alloys acceptable to the Commandant.                                                               

    (4) Openings for fill and vent pipes must be on the topmost surface 
of a tank. There must be no openings in the bottom, sides, or ends of a 
tank except as follows:
    (i) The opening for the fuel supply piping is not restricted to the 
top of the tank.
    (ii) An opening fitted with threaded plug or cap may be used on the 
bottom of the tank for tank cleaning purposes.
    (iii) Liquid level gages must penetrate at a point that is more than 
2 inches from the bottom of the tank.
    (5) All tank joints shall be welded.
    (6) Nozzles, flanges, or other fittings for pipe connections shall 
be welded or brazed to the tank. The tank opening in way of pipe 
connections shall be properly reinforced where necessary. Where liquid 
level indicating devices are attached to the tank, they shall be of heat 
resistant materials adequately protected from mechanical damage and 
provided at the tank connections with devices which will automatically 
close in the event of rupture of the gage or gage lines.
    (7) All tanks exceeding 30 inches in any horizontal dimension shall 
be fitted with vertical baffle plates where necessary for strength or 
for control of excessive surge. In general, baffle plates installed at 
intervals not exceeding 30 inches will be considered as meeting this 
requirement.
    (8) Baffle plates, where required, shall be of the same material and 
not less than the minimum thickness required in the tank walls and shall 
be connected to the tank walls by welding or brazing. Limber holes at 
the bottom and air holes at the top of all baffle plates shall be 
provided.
    (9) Iron or steel tanks shall not be galvanized on the interior. 
Galvanizing paint or other suitable coating shall be used to protect the 
outside of iron and steel tanks.

[[Page 270]]

    (b) Installation. (1) Tanks containing fuel for emergency lighting 
units shall be located on an open deck or in an adequately ventilated 
metal compartment. No tank shall be located in a compartment where the 
temperature may exceed 150 deg. F.
    (2) When cylindrical tanks are installed, longitudinal seams shall 
be located as near the top of the tank as possible. Fuel tanks shall be 
located in, or as close as practicable, to the machinery space which is 
served.
    (3) Fuel tanks shall be so installed as to permit examination, 
testing, or removal for cleaning.
    (4) Fuel tanks shall be adequately supported and braced to prevent 
movement. Portable tanks are not permitted.
    (5) All fuel tanks shall be electrically bonded to the common 
ground.
    (c) Tests. (1) Prior to installation, tanks vented to the atmosphere 
shall be tested to and must withstand a pressure of 5 pounds per square 
inch or 1\1/2\ times the maximum head to which they may be subjected in 
service, whichever is greater. A standpipe of 11\1/2\ feet in height 
attached to the tank may be filled with water to accomplish the 5 pounds 
per square inch test. Permanent deformation of the tank will not be 
cause for rejection unless accompanied by leakage.
    (2) After installation of the fuel tank on a vessel the complete 
installation shall be tested in the presence of a marine inspector to a 
head not less than that to which the tank may be subjected in service. 
Fuel may be used as a testing medium.
    (3) All tanks not vented to atmosphere shall be constructed and 
tested in accordance with part 54 of this subchapter.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGFR 72-59R, 37 FR 6190, Mar. 25, 1972]



Sec. 58.50-15   Alternate material for construction of independent fuel tanks.

    (a) Materials other than those specifically listed in Table 58.50-
5(a) and in Table 58.50-10(a) may be used for fuel tank construction 
only if the tank as constructed meets the testing requirements of Marine 
Department, Underwriters' Laboratories, Inc. (formerly Yacht Safety 
Bureau) STD E-3, paragraph E3-3. Testing may be accomplished by any 
acceptable laboratory, such as the Marine Department, Underwriters' 
Laboratories, Inc. (formerly Yacht Safety Bureau), or may be done by the 
fabricator if witnessed by a marine inspector.

[CGFR 68-82, 33 FR 18878, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970]



  Subpart 58.60--Industrial Systems and Components on Mobile Offshore 
                          Drilling Units (MODU)

    Source: CGD 73-251, 43 FR 56801, Dec. 4, 1978, unless otherwise 
noted.



Sec. 58.60-1  Applicability.

    This subpart applies to the following industrial systems on board a 
mobile offshore drilling unit (MODU):
    (a) Cementing systems.
    (b) Circulation systems, including--
    (1) Pipes and pumps for mud;
    (2) Shale shakers;
    (3) Desanders; and
    (4) Degassers.
    (c) Blow out preventor control systems.
    (d) Riser and guideline tensioning systems.
    (e) Motion compensation systems.
    (f) Bulk material storage and handling systems.
    (g) Other pressurized systems designed for the MODU's industrial 
operations.



Sec. 58.60-2  Alternatives and substitutions.

    (a) The Coast Guard may accept substitutes for fittings, material, 
apparatus, equipment, arrangements, calculations, and tests required in 
this subpart if the substitute provides an equivalent level of safety.
    (b) In any case where it is shown to the satisfaction of the 
Commandant that the use of any particular equipment, apparatus, 
arrangment, or test is unreasonable or impracticable, the Commandant may 
permit the use of alternate equipment, apparatus, arrangement, or test 
to such an extent and upon such condition as will insure, to

[[Page 271]]

his satisfaction, a degree of safety consistent with the minimum 
standards set forth in this subpart.



Sec. 58.60-3  Pressure vessel.

    A pressure vessel that is a component in an industrial system under 
this subpart must meet the applicable requirements in Sec. 54.01-5 of 
this chapter.

[CGD 73-251, 43 FR 58601, Dec. 4, 1978, as amended by CGD 77-147, 47 FR 
21811, May 20, 1982]



Sec. 58.60-5  Industrial systems: locations.

    An industrial system under this subpart must not be in a space that 
is--
    (a) Concealed; or
    (b) Inaccessible to industrial personnel.



Sec. 58.60-7  Industrial systems: piping.

    The piping for industrial systems under this subpart must meet ANSI 
B31.3, except that blow out preventor control systems must also meet API 
RP 53.

[CGD 88-032, 56 FR 35824, July 29, 1991]



Sec. 58.60-9  Industrial systems: design.

    Each system under this subpart must be designed and analyzed in 
accordance with the principles of API RP 14C.

[CGD 88-032, 56 FR 35824, July 29, 1991]



Sec. 58.60-11  Analyses, plans, diagrams and specifications: submission.

    (a) Each industrial system must be analyzed by a registered 
professional engineer to certify that the system has been designed in 
accordance with applicable standards.
    (b) The certification must--
    (1) Appear on all diagrams and analyses; and
    (2) Be submitted under Sec. 50.20-5 of this chapter.
    (c) Standards or specifications for non-pressurized, mechanical or 
structural systems, and components such as derricks, drawworks, and 
rotary tables which comply with standards or specifications not 
referenced in this subchapter must be referenced on the plans or in the 
specifications of the unit.



Sec. 58.60-13  Inspection.

    An industrial system is accepted by the Coast Guard if the inspector 
finds--
    (a) The system meets this subpart;
    (b) There are guards, shields, insulation or similar devices for 
protection of personnel; and
    (c) The system is not manifestly unsafe.



PART 59--REPAIRS TO BOILERS, PRESSURE VESSELS AND APPURTENANCES--Table of Contents




                   Subpart 59.01--General Requirements

Sec.
59.01-1  Scope.
59.01-2  Incorporation by reference.
59.01-3  Adoption of the ASME Code.
59.01-5  Repairs, replacements, or alterations.

   Subpart 59.10--Welding Repairs to Boilers and Pressure Vessels in 
                                 Service

59.10-1  Scope.
59.10-5  Cracks.
59.10-10  Corroded surfaces.
59.10-15  Rivets and staybolts.
59.10-20  Patches in shells and tube sheets.
59.10-25  Stayed areas.
59.10-30  Seal welding.
59.10-35  Wrapper plates and back heads.

               Subpart 59.15--Miscellaneous Boiler Repairs

59.15-1  Furnace repairs.
59.15-5  Stayed furnaces and combustion chambers.
59.15-10  Bagged or blistered shell plates.

               Subpart 59.20--Welding Repairs to Castings

59.20-1  Carbon-steel or alloy-steel castings.

    Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 227; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18887, Dec. 18, 1968, unless otherwise 
noted.



                   Subpart 59.01--General Requirements



Sec. 59.01-1   Scope.

    The regulations in this part apply to the repairs of all boilers, 
appurtenances and pressure vessels subject to inspection by the Coast 
Guard.

[[Page 272]]



Sec. 59.01-2  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than that specified 
in paragraph (b) of this section, the Coast Guard must publish notice of 
change in the Federal Register and make the material available to the 
public. All approved material is on file at the Office of the Federal 
Register, 800 North Capitol Street, NW., suite 700, Washington, DC, and 
at the U.S. Coast Guard, Office of Design and Engineering Standards (G-
MSE), 2100 Second Street SW., Washington, DC 20593-0001 and is available 
from the sources indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are:

             American Society of Mechanical Engineers (ASME)

   United Engineering Center, 345 East 47th Street, New York, NY 10017

Boiler and Pressure Vessel (B&PV) Code Section I, Power                 
 Boilers, July 1989 with 1989 addenda.......................     59.10-5
Boiler and Pressure Vessel Code Section VII, Recommended                
 Guidelines for the Care of Power Boilers, July 1989 with               
 1989 addenda...............................................     59.01-5
Boiler and Pressure Vessel Code Section VIII, Division 1,               
 Pressure Vessels July 1989 with 1989 addenda...............    59.10-5;
                                                                59.10-10
Boiler and Pressure Vessel Code Section IX, Welding and                 
 Brazing Qualifications, July 1989 with 1989 addenda........     59.10-5
                                                                        


[CGD 88-032, 56 FR 35824, July 29, 1991, as amended by CGD 95-072, 60 FR 
50462, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



Sec. 59.01-3   Adoption of the ASME Code.

    (a) General. The portions of the ASME (American Society of 
Mechanical Engineers) Code listed in this part for various subjects are 
adopted and shall be the governing requirements except as limited, 
modified, or replaced by specific requirements in this subchapter.

(Sec. 552, 80 Stat. 383, as amended; 5 U.S.C. 552)



Sec. 59.01-5   Repairs, replacements, or alterations.

    (a) No repairs, replacements, or alterations, except emergency 
repairs, shall be made to boilers, pressure vessels, their mountings or 
internal fittings, safety valves, piping systems, or pressure appliances 
without prior approval by the Officer in Charge, Marine Inspection.
    (b) Emergency repairs, replacements, or alterations shall be 
reported as soon as practicable to the Officer in Charge, Marine 
Inspection, at or nearest the first port where the vessel may call after 
such repairs are made.
    (c) Plan approval shall be obtained from the Officer in Charge, 
Marine Inspection, for all alterations to systems in service as listed 
in Sec. 56.01-10(c) of this subchapter and those items listed in 
paragraph (a) of this section.
    (d) Repairs, replacements, or alterations to machinery or items not 
covered by other sections of this part shall be made in a manner 
consistent with the part of this subchapter containing the construction 
standards for the item in question.
    (e) Where applicable, manufacturers' instruction books, manuals, 
etc., and the Mechanical Injury Section, paragraphs C4.401 through 
C4.427 of section VII of the ASME Code, shall be used for guidance.



   Subpart 59.10--Welding Repairs to Boilers and Pressure Vessels in 
                                 Service



Sec. 59.10-1   Scope.

    (a) Repairs to boilers or pressure vessels in service may be 
performed by welding provided the welding meets the applicable 
requirements of part 57 of this subchapter.
    (b) No repairs by welding shall be made except temporary emergency 
repairs without prior approval of the Officer in Charge, Marine 
Inspection. Emergency repairs shall be replaced with permanent repairs 
meeting the requirements of this subchapter when the

[[Page 273]]

vessel returns to a port in which an Officer in Charge, Marine 
Inspection, is located except in the case of minor repairs which in the 
opinion of the Officer in Charge, Marine Inspection, do not materially 
affect the safety of the boiler or pressure vessel.
    (c) Repair welding of power boilers, not meeting the requirements of 
subpart 52.05 of this subchapter, is prohibited unless the stress is 
carried by such other type(s) of construction complying with the 
requirements of this subchapter, and where the adequacy of the boiler 
design is not solely dependent upon the strength of the welds.
    (d) Only welded repairs as specified in this subchapter are 
permitted on boilers and pressure vessels. The welding repairs allowed 
by this subpart apply only to boilers and pressure vessels fabricated of 
carbon steel. Welding repairs to boilers and pressure vessels fabricated 
of alloy steel will be given special consideration by the Commandant. 
Such other method of repairs by means of welding not covered in this 
subchapter shall be referred to the Commandant and may be authorized by 
him, if in his opinion, it meets the intent of this subchapter.



Sec. 59.10-5   Cracks.

    (a) Cracks extending from the calking edge of plates to the rivet 
holes of circumferential joints may be welded provided the cracks are 
veed out so that complete penetration of the weld metal is secured.
    (b) Circumferential cracks from rivet hole to rivet hole in girth 
joints may be welded provided there are not more than three consecutive 
cracked ligaments nor more than a total of six cracked ligaments in any 
one girth joint.
    (c) Cracks in staybolted plates may be welded provided they are 
located entirely within staybolted areas and the total length of any 
crack or series of consecutive cracks does not exceed two staybolt 
pitches.
    (d) Cracks in plain, circular or Adamson ring or similar type 
furnaces may be welded provided any one crack does not exceed 12 inches 
in length and after completion the weld is stress-relieved. Cracks in 
corrugated furnaces may be repaired by welding provided any one crack 
does not exceed 20 inches in length.
    (e) Fire cracks may be welded at riveted door openings extending 
from the edge of the plate, but not more than 2 inches beyond the 
centerline of the rivet holes.
    (f) Cracks may be welded between tube holes in the shell of water 
tube boiler drums, provided there are not more than two cracks in any 
one row in any direction, nor more than a total of four cracks in a 
drum, and further provided the welding meets the requirements of this 
subchapter for Class I welded pressure vessels and is approved by the 
Commandant.
    (g) Cracks that occur in superheater manifolds, water wallheaders, 
water drums, sectional headers, and other appurtenances including steam 
manifolds of water tube boilers may be repaired in accordance with 
paragraph (h) of this section if the repair is approved.
    (h) All cracks permitted to be repaired under this subpart shall be 
excavated to sound metal by grinding, flame or arc gouging or chipping 
out the defective metal to form a clean welding groove. The first two 
methods of excavation are preferable. Either a V groove or U groove 
wherein complete penetration of the weld metal is secured may be used. 
After excavation is completed and prior to welding, the excavated area 
shall be examined by magnetic particle, dye penetrant, or other 
acceptable test method. When the reverse side of the weld is accessible 
the root of the weld shall be chipped or ground out to insure a clean 
surface of the originally deposited metal and the resultant groove 
welded to obtain a sound weld having complete penetration. When the weld 
cannot be back chipped because the reverse side is inaccessible, a 
backing strip or other approved means of assuring full penetration shall 
be employed.
    (i) During welding of cracks a preheat shall be maintained by 
controlled temperatures. The degree of preheat shall be determined by 
the rules listed in accordance with the materials P-number groupings of 
PW-38, section I, Appendix R, section VIII and Table Q. 11.1, section IX 
of the ASME Code. For thicknesses exceeding three-fourths

[[Page 274]]

inch, suitable U grooves should be employed. A welding sequence shall be 
used so as to equalize welding stresses.
    (j) Postweld heat treatment of repaired cracks shall be performed in 
accordance with the rules specified in PW-39, section I and UW-40, 
section VIII of the ASME Code for boilers and pressure vessels 
respectively.
    (k) Welded repairs of cracks shall be nondestructively tested in 
accordance with the rules specified in PW-40, section I, and UW-51, 
section VIII of the ASME Code for boilers and pressure vessels 
respectively.
    (l) After cracks originating in tube or rivet holes are repaired by 
welding, the holes shall be properly reamed and the weld reinforcing 
ground flush with the plate in way of rivet heads.
    (m) Flat tube sheets in fire-tube boilers which have corroded or 
where cracks exist in the ligaments may be repaired by welding.
    (n) Welding repairs to drums of power boilers, except as otherwise 
permitted in this subpart, are prohibited.



Sec. 59.10-10   Corroded surfaces.

    (a) Corroded surfaces in the calking edges of circumferential seams 
may be built up by welding to the original thickness under the following 
conditions:
    (1) The thickness of the original metal to be built up between the 
rivet holes and the calking edge shall not be less than one-fourth of 
the diameter of the rivet hole, and the portion of the calking edge to 
be thus reinforced shall not exceed 30 inches in length in a 
circumferential direction.
    (2) In all repairs to circumferential seams by welding, the rivets 
shall be removed over the portions to be welded for a distance of at 
least 6 inches beyond the repaired portion.
    (3) After repairs are made the rivet holes shall be reamed before 
the rivets are redriven.
    (b) It is not permissible to build up or reinforce a grooved or 
corroded area of unstayed internal surfaces by means of welding, except 
that widely scattered pit holes may be built up by welding.
    (c) Where external corrosion has reduced the thickness of flat 
plates around hand holes to an extent of not more than 40 percent of the 
original thickness and for a distance not exceeding 2 inches from the 
edge of the hole, the plate may be built up by welding.
    (d) Where stayed sheets have corroded to a depth not exceeding 40 
percent of their original thickness, they may be reinforced or built up 
by welding. Where the staybolts are fitted with riveted heads, the 
staybolts in the reinforced area shall be renewed in accordance with the 
provisions of Sec. 52.20-15 of this subchapter, but where the staybolts 
are fitted with nuts, the nuts may be removed and after reinforcing has 
been applied, collars may be welded around the staybolts in lieu of the 
nuts. Such reinforced areas shall not exceed 400 square inches nor more 
than 30 inches in one direction. Two such areas in any one plate may be 
reinforced: Provided, that the distance between the reinforced surfaces 
is not less than 30 inches.
    (e) When the corroded portion of a staybolted surface exceeds 400 
square inches, it is permissible to make repairs by cutting out the 
defective portion and replacing it with a new plate, the edges of the 
new plate to be welded in position. In such cases, new staybolts shall 
be fitted in accordance with the requirements of Sec. 52.20-15 of this 
subchapter and where welding is performed through a line of staybolts, 
welded collars as required by Figure 52.01-3 of this subchapter shall be 
used to attach the staybolts.
    (f) Eroded seams of welded pressure vessels may be repaired by 
rewelding the wasted portion. The wasted section of the seam shall be 
excavated sufficiently by grinding, flame or arc gouging or chipping to 
ensure proper weld penetration. Rewelded seams shall be nondestructively 
tested in accordance with section VIII, ASME Code.



Sec. 59.10-15   Rivets and staybolts.

    (a) It is not permitted to reinforce or build up by welding the 
heads of rivets or staybolts that have deteriorated. Such rivets or 
staybolts shall be replaced. The seal welding of rivet heads to secure 
tightness is prohibited.
    (b) Where leaks develop around staybolts which are otherwise in good 
condition, the nuts may be replaced with a beveled collar formed around

[[Page 275]]

the end of the stay by means of welding. In such cases, the depth of 
collar measured on the stay and the width measured on the plate, shall 
be equal to one-half the diameter of the staybolt.



Sec. 59.10-20   Patches in shells and tube sheets.

    (a) Unreinforced openings in the shells or drums of boilers or 
pressure vessels, the diameter of which does not exceed the maximum 
diameter of an unreinforced opening in accordance with Sec. 52.01-100 of 
this subchapter may be closed by the use of a patch or plate inside the 
drum or shell and sealed against leakage by welding. Such plates shall 
have a diameter of at least 2 inches larger than the diameter of the 
hole and shall have a thickness equal to the thickness of the plate to 
which it is attached. It is not permissible to insert such patches in 
the shell or head flush with the surrounding plate unless the 
requirements of this subchapter for Class I welded pressure vessels are 
met.
    (b) Portions of tube sheets which have deteriorated may be renewed 
by replacing the wasted portion with a new section. The ligaments 
between the tube holes may be joined by means of welding and staytubes. 
Other acceptable means of lowering the stress on the repaired section 
may be used if in the judgment of the Officer in Charge, Marine 
Inspection, it is necessary.



Sec. 59.10-25   Stayed areas.

    Welding repairs are permitted in staybolted areas or areas 
adequately stayed by other means so that should failure of the welds 
occur the stress will be carried by the stays. The welds shall be 
located entirely within staybolted areas and shall not pass through the 
outer row of stays.



Sec. 59.10-30   Seal welding.

    Where leaks occur in riveted joints or connections, they shall be 
carefully investigated to determine the cause. Such leaks may be made 
tight by seal welding the edge, if, in the opinion of the Officer in 
Charge, Marine Inspection, this will make a satisfactory repair.



Sec. 59.10-35   Wrapper plates and back heads.

    Wrapper plates and back heads may be renewed in whole or repaired as 
follows:
    (a) Wrapper plates or backs heads shall be cut between two rows of 
staybolts or on a line of staybolts where the thickness is approximately 
the same as the original construction. If welding is employed on a line 
of staybolts, the staybolts shall be fitted with a welded collar as 
required by Figure 52.01-3 of this subchapter.
    (b) The edges of wrapper plates riveted to tube sheets and back 
heads shall be removed by cutting out the rivets.
    (c) The edges of existing plates and new plates shall be beveled by 
chipping, flame cutting or grinding so as to form a suitable groove 
whereby complete penetration of the weld metal will be obtained. The 
edge preparation and preheat shall comply with the requirements of 
Sec. 59.10-5(h).
    (d) The edges of the new plate shall be buttwelded and the plate 
shall be riveted to the flanges of the tube sheet and back heads and the 
staybolts renewed.
    (e) Sections of wrapper plates of combustion chambers outside of 
stayed areas may be repaired by welding provided the welded joints are 
stress-relieved by means of controlled heat and the joints are 
nondestructively tested.



               Subpart 59.15--Miscellaneous Boiler Repairs



Sec. 59.15-1   Furnace repairs.

    (a) Where corrugated or plain furnances or flues are distorted by 
1\1/2\ inches or more, they shall be repaired by either of the following 
methods:
    (1) The furnace shall be forced back to a true circular shape, and 
the Officer in Charge, Marine Inspection, may require strongbacks or 
other acceptable means of support to hold the furnace from future 
collapse, if in his opinion such support is necessary; or,
    (2) The furnace shall be adequately stayed as found necessary in the 
judgment of the Officer in Charge, Marine Inspection.

[[Page 276]]

    (b) Distortion means the difference between any single measured 
diameter of the furnace and the diameter of a true circle at the same 
location. The diameter of the true circle may be taken as the original 
furnace diameter or may be determined by a means acceptable to the 
Officer in Charge, Marine Inspection.
    (c) Where the distortion does not exceed 1\1/2\ inches it will not 
be necessary to force the furnace back to a true circle if the allowable 
pressure is reduced in the ratio of 1\1/2\ percent for each one-tenth of 
an inch of distortion. However, if the maximum distortion does not 
exceed 1 inch and the length of the distorted area is not more than 
three corrugations, or, if the maximum distortion does not exceed three-
fourths inch for a length greater than three corrugations of distorted 
area, the repairs or reduction in pressure will not be required unless 
considered necessary by the marine inspector.
    (d) When it becomes necessary to rivet a patch to a furnace or other 
part of the heating surface, the riveted patch shall be placed on the 
waterside of the plate in order not to form a pocket in which sediment 
may collect.
    (e) Furnace crowns which have become distorted, not in excess of the 
limitations provided in paragraph (c) of this section, may be repaired 
by pumping back the distorted section to as nearly a true circle as 
possible and reinforcing the same by means of a ring, arc- or gas-welded 
to the distorted corrugation as shown in Figure 59.15-1, the welding to 
be done by welders and welding processors qualified in accordance with 
part 57 of this subchapter using acceptable welding electrodes in 
accordance with Sec. 57.02-4 of this subchapter.
[GRAPHIC] [TIFF OMITTED] TC01FE91.037

Figure 59.15-1.--Approved method of reinforcing furnaces by means of arc 
or gas welding._________________________________________________________



Sec. 59.15-5   Stayed furnaces and combustion chambers.

    (a) Where the plate forming the walls of stayed furnaces or 
combustion chambers become bulged between staybolts, repairs may be made 
by inserting an additional staybolt in the center of such space 
supported by the four staybolts.
    (b) Where it is desired to rivet a patch to the wall of a stayed 
furnace or combustion chamber, the defective portion of the plate shall 
be cut away until solid material is reached, the patch shall be riveted 
on the waterside, and the staybolts renewed, and extended through the 
new plate.



Sec. 59.15-10   Bagged or blistered shell plates.

    (a) When the shell plates of cylindrical boilers which are exposed 
to the

[[Page 277]]

radiant heat of the fire become bagged or blistered, it shall be the 
duty of the chief engineer in charge of the vessel to notify the Officer 
in Charge, Marine Inspection, for examination before raising steam on 
the boiler.
    (b) Where the shell plate is bagged due to overheating, the Officer 
in Charge, Marine Inspection, may, if in his judgment it is practicable, 
permit the same to be driven back to its original position.
    (c) Where the shell plate has blistered, bagged, or bulged to such 
an extent that there is an appreciable thinning of the plate, the 
Officer in Charge, Marine Inspection, shall require the defective 
portion to be cut away and the shell repaired by fitting a patch of 
steel plate conforming to the requirements of Sec. 52.01-90 of this 
subchapter in place of the defective portion. Care shall be taken that 
the riveting schedule of the patch is so arranged as to give the plate 
sufficient strength to withstand the stress placed on it in service.



               Subpart 59.20--Welding Repairs to Castings



Sec. 59.20-1   Carbon-steel or alloy-steel castings.

    Defects in carbon-steel or alloy-steel castings may be repaired by 
welding. The repairs shall be performed in accordance with the material 
specification to which the casting was originally supplied.



PART 60 [RESERVED]






PART 61--PERIODIC TESTS AND INSPECTIONS--Table of Contents




                         Subpart 61.01--General

Sec.
61.01-1  Scope.

                Subpart 61.03--Incorporation of Standards

61.03-1  Incorporation by reference.

             Subpart 61.05--Tests and Inspections of Boilers

61.05-1  Scope.
61.05-5  Preparation of boilers for inspection and test.
61.05-10  Boilers in service.
61.05-15  Boiler mountings and attachments.
61.05-20  Boiler safety valves.

        Subpart 61.10--Tests and Inspections of Pressure Vessels

61.10-1  Scope.
61.10-5  Pressure vessels in service.

             Subpart 61.15--Periodic Tests of Piping Systems

61.15-1  Scope.
61.15-5  Steam piping.
61.15-10  Liquefied petroleum gas piping for heating and cooking.
61.15-12  Nonmetallic expansion joints.
61.15-15  Other piping.

        Subpart 61.20--Periodic Tests of Machinery and Equipment

61.20-1  Steering gear.
61.20-3  Main and auxiliary machinery and associated equipment, 
          including fluid control systems.
61.20-5  Drydock examination.
61.20-15  Tailshaft examination.
61.20-17  Examination intervals.
61.20-18  Examination requirements.
61.20-21  Extension of examination interval.
61.20-23  Tailshaft clearance; bearing weardown.

   Subpart 61.30--Tests and Inspections of Fired Thermal Fluid Heaters

61.30-1  Scope.
61.30-5  Preparation of thermal fluid heater for inspection and test.
61.30-10  Hydrostatic test.
61.30-15  Visual inspection.
61.30-20  Automatic control and safety tests.

 Subpart 61.35--Design Verification and Periodic Testing for Automatic 
                            Auxiliary Boilers

61.35-1  General.
61.35-3  Required tests and checks.

Subpart 61.40--Design Verification and Periodic Testing of Vital System 
                               Automation

61.40-1  General.
61.40-3  Design verification testing.
61.40-6  Periodic safety tests.
61.40-10  Test procedure details.

    Authority: 43 U.S.C. 1333; 46 U.S.C. 2103, 3306, 3703; E.O. 12234, 
45 FR 58801, 3 CFR, 1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGFR 68-82, 33 FR 18890, Dec. 18, 1968, unless otherwise 
noted.

[[Page 278]]



                         Subpart 61.01--General



Sec. 61.01-1   Scope.

    (a) Periodic tests and inspection shall be made of the main and 
auxiliary machinery, boilers, and other equipment as prescribed in this 
part.
    (b) The inspections and tests shall insure that the equipment and 
associated structure are in satisfactory operating conditions and fit 
for the service for which they are intended.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 95-012, 60 FR 
48050, Sept. 18, 1995]



                Subpart 61.03--Incorporation of Standards



Sec. 61.03-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register under 5 U.S.C. 
552(a) and 1 CFR part 51. To enforce any edition other than that 
specified in paragraph (b) of this section, the Coast Guard must publish 
a notice of change in the Federal Register and the material must be 
available to the public. All approved material available for inspection 
at the Office of the Federal Register, 800 North Capital Street NW., 
suite 700, Washington, DC and at the U.S. Coast Guard, Office of Design 
and Engineering Standards (G-MSE), 2100 Second Street SW., Washington, 
DC and is available from the sources indicated in paragraph (b) of this 
section.
    (b) The material approved for incorporation by reference in this 
part and the sections affected are as follows:

American Society for Testing and Materials (ASTM) 1916 Race Street, 
          Philadelphia, PA 19103
ASTM D 665-92, Standard Test Method for Rust-Preventing Characteristics 
          of Inhibited Mineral Oil in the Presence of Water, 1992--
          61.20-17

[CGD 95-027, 61 FR 26001, May 23, 1996, as amended by CGD 96-041, 61 FR 
50728, Sept. 27, 1996]



             Subpart 61.05--Tests and Inspections of Boilers



Sec. 61.05-1  Scope.

    The term boiler as used in this subpart includes power boilers 
subject to part 52 and heating boilers subject to part 53 of this 
subchapter.

[CGD 80-064, 49 FR 32193, Aug. 13, 1984]



Sec. 61.05-5   Preparation of boilers for inspection and test.

    (a) For internal inspection, manhole and handhold plates, and 
washout plugs shall be removed as required by the marine inspector and 
the furnace and combustion chambers shall be thoroughly cooled and 
cleaned. Portable obstructions shall be removed as necessary for proper 
access.
    (b) In preparing the boilers for the hydrostatic test, they shall be 
filled with water at not less than 70 deg. F. and not more than 160 deg. 
F. for watertube boilers, and not more than 100 deg. F. for firetube 
boilers. The safety valves shall be secured by means of gags or clamps.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 95-027, 61 FR 
26001, May 23, 1996]



Sec. 61.05-10  Boilers in service.

    (a) Each boiler, including superheater, reheater, economizer, 
auxiliary boiler, low-pressure heating boiler, and unfired steam boiler, 
must be available for examination by the marine inspector at intervals 
specified by Table 61.05-10, and more often if necessary, to determine 
that the complete unit is in a safe and satisfactory condition. When a 
hydrostatic test is required, the marine inspector may examine all 
accessible parts of the boiler while it is under pressure.
    (b) The owner, master, or person in charge of the vessel shall give 
ample notice to the cognizant Officer in Charge, Marine Inspection, so 
that a marine inspector may witness the tests and make the required 
inspections.
    (c) Firetube boilers which cannot be entered or which cannot be 
satisfactorily examined internally, all boilers

[[Page 279]]

of lap seam construction and all boilers to which extensive repairs have 
been made or the strength of which the marine inspector has any reason 
to question, shall be subjected to a hydrostatic test of 1\1/2\ times 
the maximum allowable working pressure. All other boilers shall be 
subjected to a hydrostatic test of 1\1/4\ times the maximum allowable 
working pressure.
    (d) In applying hydrostatic pressure to boilers, arrangements shall 
be made to prevent main and auxiliary stop valves from being 
simultaneously subjected to the hydrostatic pressure on one side and 
steam pressure on the other side.
    (e) If the marine inspector has reason to believe that the boiler 
has deteriorated to any appreciable extent under the bottom where it 
rests on saddles or foundations, he shall cause the boiler to be lifted 
to such position that it can be thoroughly examined, provided the 
examination cannot be made otherwise.
    (f) The marine inspector may require any boiler to be drilled or 
gaged to determine actual thickness any time its safety is in doubt. At 
the first inspection for certification after a firetube or flue boiler 
has been installed for 10 years, it shall be gaged to determine the 
extent of deterioration. Thickness will be measured at or near the 
waterline, at the bottom and at such other places deemed necessary by 
the marine inspector. Examination may be by drilling or a nondestructive 
means acceptable to the marine inspector. Prior to the use of a 
nondestructive method of examination, the user shall demonstrate to the 
marine inspector that results having an accuracy within plus or minus 5 
percent are consistently obtainable when using specimens similar to 
those to be examined on the boiler.
    (g) If the thickness is found to be less than the original thickness 
upon which the maximum allowable working pressure was based, it shall be 
recalculated. The thickness of the thinnest measured portion shall be 
used in this calculation. Either the design formulas given in this 
subchapter or the ones in effect when the boiler was contracted for or 
built may normally be used in this recalculation. In no case will an 
increase in the pressure allowed be made.

                             Table 61.05-10.--Inspection Intervals for Boilers 1 2 3                            
----------------------------------------------------------------------------------------------------------------
                                                             Firetube                      Any                  
                                                            boiler  150     boiler      boiler for  boiler < 150
                                                                psi                     propulsion       psi    
----------------------------------------------------------------------------------------------------------------
Hydro Test:                                                                                                     
    Passenger Vessel.....................................           2.5           2.5            1           2.5
    Other Vessel.........................................           2.5           5              1           5  
Fireside Inspection......................................           1             2.5            1           2.5
Waterside Inspection.....................................           1             2.5            1           2.5
Boiler Safety-Valve Test.................................           1           COI              1           1  
Valves Inspection........................................           5             5              5           5  
Studs and Bolts Inspection...............................          10            10             10          10  
Mountings Inspection.....................................          10            10             10          10  
Steam Gauge Test.........................................         COI           COI            COI         COI  
Fusible Plug Inspection..................................           2.5  ............          COI           2.5 
----------------------------------------------------------------------------------------------------------------
\1\ All intervals are in years; where COI is used, the intervals coincide with the applicable vessel's          
  inspection for certification.                                                                                 
\2\ Where the 2.5-year interval is indicated: two tests or inspections must occur within any five-year period,  
  and no more than three years may elapse between any test or inspection and its immediate predecessor.         
\3\ Intervals for hybrid boilers are the same as for firetube boilers.                                          


[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 80-064, 49 FR 
32193, Aug. 13, 1984; CGD 83-043, 60 FR 24781, May 10, 1995]



Sec. 61.05-15   Boiler mountings and attachments.

    (a) Each valve shall be opened and examined by the marine inspector 
at the interval specified in Table 61.05-10.
    (b) Each stud or bolt for each boiler mounting that paragraph (c) of 
this section requires to be removed may be examined by the marine 
inspector.
    (c)(1) Each boiler mounting may be removed from the boiler and be 
examined by the marine inspector at the interval specified by Table 
61.05-10 when any of the following conditions exist:

[[Page 280]]

    (2) Where boiler mountings or valves are attached to boiler nozzles 
and a satisfactory internal examination of these mountings or valves and 
their attaching studs, bolts, or other means of attachment, can be 
performed by opening up the valves, such mountings or valves need not be 
removed from the boiler unless in the opinion of the Officer in Charge, 
Marine Inspection, such action is necessary.
    (d) The Officer in Charge, Marine Inspection, may require the 
examinations prescribed in this section to be made at more frequent 
intervals, if in his opinion such action is necessary to be assured of 
the safety of the boiler and its attachments.
    (e) Water columns, gage glasses, and gage cocks shall be examined to 
determine that they are in satisfactory working order.
    (f) Each steam gauge for a boiler or a main steam line may be 
examined and checked for accuracy by the marine inspector at the 
interval specified by Table 61.05-10.
    (g) Each fusible plug may be examined by the marine inspector at the 
interval specified by Table 61.05-10.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 83-043, 60 FR 24782, May 10, 1995]



Sec. 61.05-20  Boiler safety valves.

    Each safety valve for a drum, superheater, or reheater of a boiler 
shall be tested and resealed in the presence of the marine inspector at 
the interval specified by Table 61.05-10.

[CGD 83-043, 60 FR 24782, May 10, 1995]



        Subpart 61.10--Tests and Inspections of Pressure Vessels



Sec. 61.10-1  Scope.

    All pressure vessels aboard ships, mobile offshore drilling units, 
and barges are subject to periodic inspection.

[CGD 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 73-251, 43 FR 
56801, Dec. 4, 1978; CGD 95-012, 60 FR 48050, Sept. 18, 1995]



Sec. 61.10-5  Pressure vessels in service.

    (a) Basic requirement. Each pressure vessel must be examined or 
tested twice within any five-year period, except that no more than three 
years may elapse between any test or examination and its immediate 
predecessor. The extent of the test or examination should be that 
necessary to determine that the pressure vessel's condition is 
satisfactory and that the pressure vessel is fit for the service 
intended.
    (b) Internal and external tests and inspections. Each pressure 
vessel stamped with the Coast Guard symbol, and each pressure vessel in 
a system regulated under subpart 58.60 of this subchapter that is fitted 
with a manhole or other inspection opening so it can be satisfactorily 
examined internally, must be opened twice within any five-year period, 
except that no more than three years may elapse between any examination 
and its immediate predecessor. Each pressure vessel must be thoroughly 
examined internally and externally. No pressure vessel need be 
hydrostatically tested except when any defect in a pressure vessel is 
found that, in the marine inspector's opinion, may affect the safety of 
the pressure vessel; in this case, the pressure vessel should be 
hydrostatically tested at a pressure of 1\1/2\ times the maximum 
allowable working pressure.
    (c) Special purpose vessels. Tubular heat exchangers, hydraulic 
accumulators, and those pressure vessels used in refrigeration service 
shall be examined under operating conditions at the regular inspection 
for certification.
    (d) Hydrostatic tests under pressure. Each pressure vessel, other 
than one exempted by this section, must be subjected to a hydrostatic 
test at a pressure of 1\1/4\ times the maximum allowable working 
pressure twice within any five-year period, except that no more than 
three years may elapse between any test and its immediate predecessor.
    (e) Exemptions from hydrostatic tests. The following pressure 
vessels will not normally be subjected to a hydrostatic test:
    (1) Tubular heat exchangers.
    (2) Pressure vessels used in refrigeration service.
    (3) Hydraulic accumulators.
    (4) Pressure vessels which have been satisfactorily examined 
internally by a marine inspector and in which no defects have been found 
which impair the safety of the pressure vessel.

[[Page 281]]

    (5) Pressure vessels which were initially pneumatically tested in 
accordance with part 54 of this subchapter.
    (6) Pressure vessels not stamped with the Coast Guard Symbol.
    (f) Compressed gas or hazardous liquid pressure vessel tests. Cargo 
tanks of pressure vessel configuration containing liquefied, compressed 
gases or hazardous liquids must be inspected and tested as required by 
the applicable regulations published in subchapter D or subchapter I of 
this chapter.
    (g) Bulk storage tanks. Each bulk storage tank containing 
refrigerated liquefied CO2 for use aboard a vessel as a fire-
extinguishing agent shall be subjected to a hydrostatic test of 1\1/2\ 
times the maximum allowable working pressure in the tenth year of the 
installation and at ten-year intervals thereafter. After the test, the 
tank should be drained and an internal examination made. Parts of the 
jacket and lagging on the underside of the tank designated by the marine 
inspector must be removed at the time of the test so the marine 
inspector may determine the external condition of the tank.
    (h) Pneumatic tests. (1) Pressure vessels that were pneumatically 
tested before being stamped with the Coast Guard Symbol must be 
thoroughly examined internally and externally biennially at the regular 
inspection for certification accept in those instances where the 
inspection interval is prescribed otherwise, by the specific regulations 
applicable to the product carried, in subchapter D. (Tank Vessels), 
subchapter I (Cargo and Miscellaneous Vessels), or subchapter I-A 
(Mobile Offshore Drilling Units) of this chapter. For those tanks whose 
design precludes a thorough intenal or external examination, the 
thickness must be determined by a nondestructive method acceptable to 
the Officer in Charge, Marine Inspection.
    (i) Safety valves on pressure vessels. The setting of safety valves 
or relief valves on all pressure vessels except cargo tanks, shall be 
checked by the marine inspector at each regular inspection for 
certification. Cargo tank safety or relief valves shall be checked at 
the interval required in subchapter D (Tank Vessels) or I (Cargo and 
Miscellaneous Vessels) of this chapter, as appropriate.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGFR 69-127, 35 
FR 9980, June 17, 1970; CGD 73-251, 43 FR 56801, Dec. 4, 1978; CGD 77-
147, 47 FR 21811, May 20, 1982; CGD 86-033, 53 FR 36024, Sept. 16, 1988; 
CGD 83-043, 60 FR 24782, May 10, 1995]



             Subpart 61.15--Periodic Tests of Piping Systems



Sec. 61.15-1   Scope.

    In conducting hydrostatic tests on piping, the required test 
pressure shall be maintained for a sufficient length of time to permit 
an inspection to be made of all joints and connections. The setting of 
the relief valve or safety valve will be considered as establishing the 
maximum allowable working pressure of the system.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 95-012, 60 FR 
48050, Sept. 18, 1995]



Sec. 61.15-5   Steam piping.

    (a) Main steam piping shall be subjected to a hydrostatic test equal 
to 1\1/4\ times the maximum allowable working pressure at the same 
periods prescribed for boilers in Sec. 61.05-10. The hydrostatic test 
shall be applied from the boiler drum to the throttle valve. If the 
covering of the piping is not removed, the test pressure shall be 
maintained on the piping for a period of ten minutes. If any evidence of 
moisture or leakage is detected, the covering shall be removed and the 
piping thoroughly examined.
    (b) All steam piping subject to pressure from the main boiler should 
be subjected to a hydrostatic test at a pressure of 1\1/4\ times the 
maximum allowable working pressure of the boiler after every five years 
of service except as otherwise provided for in paragraph (a) of this 
section. Unless the covering of the piping is removed, the test pressure 
must be maintained on the piping for ten minutes. If any evidence of 
moisture or leakage is detected, the covering should be removed and the 
piping thoroughly examined. No piping with a nominal size of 3 inches or 
less need be hydrostatically tested.
    (c) The setting of safety and relief valves installed in piping 
systems shall

[[Page 282]]

be checked by the marine inspector at each inspection for certification.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 73-248, 39 FR 
30839, Aug. 26, 1974; CGD 83-043, 60 FR 24782, May 10, 1995]



Sec. 61.15-10   Liquefied petroleum gas piping for heating and cooking.

    (a) Leak tests as described in paragraph (b) of this section shall 
be conducted at least once each month and at each inspection for 
certification. The tests required at monthly intervals shall be 
conducted by a licensed officer of the vessel or qualified personnel 
acceptable to the Officer in Charge, Marine Inspection. The owner, 
master, or person in charge of the vessel shall keep records of such 
tests showing the dates when performed and the name(s) of the person(s) 
and/or company conducting the tests. Such records shall be made 
available to the marine inspector upon request and shall be kept for the 
period of validity of the vessel's current certificate of inspection. 
Where practicable, these records should be kept in or with the vessel's 
logbook.
    (b) Test system for leakage in accordance with the following 
procedure: With appliance valve closed, the master shutoff valve on the 
appliance open, and with one cylinder valve open, not pressure in gage. 
Close cylinder valve. The pressure should remain constant for at least 
10 minutes. If the pressure drops, locate leakage by application of 
liquid detergent or soapy water solution at all connections. Never use 
flame to check for leaks. Repeat test for each cylinder in a 
multicylinder system.



Sec. 61.15-12  Nonmetallic expansion joints.

    (a) Nonmetallic expansion joints must be examined externally at each 
inspection for certification for signs of excessive wear, fatigue, 
deterioration, physical damage, misalignment, improper flange-to-flange 
spacing, and leakage. A complete internal examination must be conducted 
when an external examination reveals excessive wear or other signs of 
deterioration or damage.
    (b) A nonmetallic expansion joint must be replaced ten years after 
its date of manufacture if it is located in a system which penetrates 
the vessel's side and both the penetration and the nonmetallic expansion 
joint are located below the deepest load waterline. The Officer in 
Charge, Marine Inspection may grant an extension of the ten year 
replacement to coincide with the vessel's next drydocking.

[CGD 77-140, 54 FR 40615, Oct. 2, 1989]



Sec. 61.15-15   Other piping.

    (a) All other piping systems shall be examined under working 
conditions as required by the marine inspector.



        Subpart 61.20--Periodic Tests of Machinery and Equipment



Sec. 61.20-1   Steering gear.

    (a) Steering gear shall be tested and inspected by the marine 
inspector at each inspection for certification and oftener if necessary.
    (b) All devices employed in the change-over from automatic to manual 
operation shall be examined and tested.



Sec. 61.20-3   Main and auxiliary machinery and associated equipment, including fluid control systems.

    (a) At each inspection for certification the marine inspector shall 
conduct such tests and inspections of the main propulsion and auxiliary 
machinery and of its associated equipment, including the fluid control 
systems, as he feels necessary to check safe operation.
    (b) Remote control for the means of stopping machinery driving 
forced and induced draft fans, fuel oil transfer pumps, fuel oil unit 
pumps, and fans in the ventilation systems serving machinery and cargo 
spaces shall be tested at each regular inspection for certification.



Sec. 61.20-5   Drydock examination.

    (a) When any vessel is drydocked, examination shall be made of the 
propeller, stern bushing, sea connection, and fastenings if deemed 
necessary by the marine inspector.
    (b) Sea chests, sea valves, sea strainers, and valves for the 
emergency bilge suction shall be opened up for examination at the time 
of drydocking if

[[Page 283]]

deemed necessary by a marine inspector.

[CGFR 68-82, 33 FR 18890, Dec. 18, 1968, as amended by CGD 84-024, 53 FR 
32231, Aug. 24, 1988]



Sec. 61.20-15  Tailshaft examination.

    The rules in Secs. 61.20-15 through 61.20-23 apply only to vessels 
in ocean and coastwise service. Each examination, inspection and test 
prescribed by these sections must be conducted in the presence of a 
marine inspector.

[CGD 78-153, 45 FR 52388, Aug. 7, 1980]



Sec. 61.20-17  Examination intervals.

    (a) A lubricant that demonstrates the corrosion inhibiting 
properties of oil when tested in accordance with ASTM D 665-92 is 
considered to be equivalent to oil for the purposes of the tailshaft 
examination interval.
    (b) Except as provided in paragraphs (c) through (f) of this 
section, each tailshaft on a vessel must be examined twice within any 5 
year period. No more than 3 years may elapse between any 2 tailshaft 
examinations.
    (c) Tailshafts on vessels fitted with multiple shafts must be 
examined once every 5 years.
    (d) Tailshafts with inaccessible portions fabricated of materials 
resistant to corrosion by sea water, or fitted with a continuous liner 
or a sealing gland which prevents sea water from contacting the shaft, 
must be examined once every 5 years if they are constructed or fitted 
with a taper, keyway, and propeller designed in accordance with the 
American Bureau of Shipping standards to reduce stress concentrations or 
are fitted with a flanged propeller. Accessible portions of tailshafts 
must be examined visually during each drydock examination.
    (e) Tailshafts with oil lubricated bearings, including bearings 
lubricated with a substance considered to be equivalent to oil under the 
provisions of paragraph (a) of this section need not be drawn for 
examination--
    (1) If tailshaft bearing clearance readings are taken whenever the 
vessel undergoes a drydock examination or underwater survey;
    (2) If the inboard seal assemblies are examined whenever the vessel 
undergoes a drydock examination or underwater survey;
    (3) If an analysis of the tailshaft bearing lubricant is performed 
semiannually in accordance with the lubrication system manufacturer's 
recommendations to determine bearing material content or the presence of 
other contaminants; and
    (4) If--
    (i) For tailshafts with a taper, the propeller is removed and the 
taper and the keyway (if fitted) are nondestructively tested at 
intervals not to exceed 5 years; or
    (ii) For tailshafts with a propeller fitted to the shaft by means of 
a coupling flange, the propeller coupling bolts and flange radius are 
nondestructively tested whenever they are removed or made accessible in 
connection with overhaul or repairs.
    (f) Tailshafts on mobile offshore drilling units are not subject to 
examination intervals under paragraphs (b) through (d) of this section 
if they are--
    (1) Examined during each regularly scheduled drydocking; or
    (2) Regularly examined in a manner acceptable to the Commandant (G-
MOC).

[CGD 95-027, 61 FR 26001, May 23, 1996, as amended by CGD 96-041, 61 FR 
50728, Sept. 27, 1996; 61 FR 52497, Oct. 7, 1996]



Sec. 61.20-18  Examination requirements.

    (a) Each tailshaft must be drawn and visually inspected at each 
examination.
    (b) On tailshafts with a taper, keyway, (if fitted) and propeller 
designed in accordance with American Bureau of Shipping standards to 
reduce stress concentrations, the forward \1/3\ of the shaft's taper 
section must be nondestructively tested in addition to a visual 
inspection of the entire shaft.
    (c) On tailshafts with a propeller fitted to the shaft by means of a 
coupling flange, the flange, the fillet at the propeller end, and each 
coupling bolt must be nondestructively tested in addition to a visual 
inspection of the entire shaft.

[CGD 84-024, 52 FR 39652, Oct. 23, 1987, as amended by CGD 84-024, 53 FR 
32231, Aug. 24, 1988]

[[Page 284]]



Sec. 61.20-21  Extension of examination interval.

    The Commandant (G-MOC) may authorize extensions of the interval 
between tailshaft examinations.

[CGD 84-024, 52 FR 39652, Oct. 23, 1987, as amended by CGD 95-072, 60 FR 
50463, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



Sec. 61.20-23  Tailshaft clearance; bearing weardown.

    (a) Water lubricated bearings, other than rubber, must be rebushed 
as follows:
    (1) Where the propelling machinery is located amidship, the after 
stern tube bearing must be rebushed when it is worn down to 6.4 mm (0.25 
in) clearance for shafts of 229 mm (9 in) or less in diameter, 7.95 mm 
(0.3125 in) clearance for shafts exceeding 229 mm (9 in) but not 
exceeding 305 mm (12 in) in diameter, and 9.53 mm (0.375 in) clearance 
for shafts exceeding 305 mm (12 in) in diameter.
    (2) Where the propelling machinery is located aft, the after stern 
tube bearing must be rebushed when weardown is 1.6 mm (.0625 in) less 
than the applicable clearance for propelling machinery located amidship.
    (b) Water lubricated rubber bearings must be rebushed when any water 
groove is half the original depth.
    (c) Oil lubricated bearings must be rebushed when deemed necessary 
by the Officer in Charge, Marine Inspection. The manufacturer's 
recommendation shall be considered in making this determination.

[CGD 78-153, 45 FR 52388, Aug. 7, 1980]



   Subpart 61.30--Tests and Inspections of Fired Thermal Fluid Heaters

    Source: CGD 80-064, 49 FR 32193, Aug. 13, 1984, unless otherwise 
noted.



Sec. 61.30-1  Scope.

    The term thermal fluid heater as used in this part includes any 
fired automatic auxiliary heating unit which uses a natural or synthetic 
fluid in the liquid phase as the heat exchange medium and whose 
operating temperature and pressure do not exceed 204 deg.C (400 deg.F) 
and 225 psig, respectively. Thermal fluid heaters having operating 
temperatures and pressures higher than 204 deg.C (400 deg.F) and 225 
psig, respectively, are inspected under subpart 61.05--Tests and 
Inspections of Boilers.



Sec. 61.30-5  Preparation of thermal fluid heater for inspection and test.

    For visual inspection, access plates and manholes shall be removed 
as required by the marine inspector and the heater and combustion 
chambers shall be thoroughly cooled and cleaned.

[CGD 80-064, 49 FR 32193, Aug. 13, 1984, as amended by CGD 95-027, 61 FR 
26002, May 23, 1996]



Sec. 61.30-10  Hydrostatic test.

    All new installations of thermal fluid heaters must be given a 
hydrostatic test of 1\1/2\ times the maximum allowable working pressure. 
The test must be conducted in the presence of a marine inspector. No 
subsequent hydrostatic tests are required unless, in the opinion of the 
Officer in Charge Marine Inspection, the condition of the heater 
warrants such a test. Where hydrostatic tests are required, an 
inspection is made of all accessible parts under pressure. The thermal 
fluid may be used as the hydrostatic test medium.



Sec. 61.30-15  Visual inspection.

    Thermal fluid heaters are examined by a marine inspector at the 
inspection for certification and when directed by the Officer in Charge 
Marine Inspection, to determine that the complete unit is in a safe and 
satisfactory condition. The visual examination includes, but is not 
limited to, the combustion chamber, heat exchanger, refractory, exhaust 
stack, and associated pumps and piping.



Sec. 61.30-20  Automatic control and safety tests.

    Operational tests and checks of all safety and limit controls, 
combustion controls, programming controls, and safety relief valves must 
be conducted by the owner, chief engineer, or person in charge at the 
inspection for certification, and when directed by the Officer in 
Charge, Marine Inspection, to determine that the control components and 
safety devices are functioning

[[Page 285]]

properly and are in satisfactory operating condition. These tests and 
checks must be conducted in the presence of a marine inspector and must 
include the following: proper prepurge, burner ignition sequence checks, 
operation of the combustion controls, limit controls, fluid flow 
controls, fluid level controls, high temperature control, proper 
postpurge control, and verification of the flame safeguard.

[CGD 88-057, 55 FR 24237, June 15, 1990]

    Note: Sections 63.05-90 and 63.10-90 of this chapter may be 
referenced concerning operating tests.



 Subpart 61.35--Design Verification and Periodic Testing for Automatic 
                            Auxiliary Boilers

    Source: CGD 88-057, 55 FR 24237, June 15, 1990, unless otherwise 
noted.



Sec. 61.35-1  General.

    (a) All automatic auxiliary boilers except fired thermal fluid 
heaters must be tested and inspected in accordance with this subpart and 
subpart 61.05 of this part.
    (b) Fired thermal fluid heaters must be tested and inspected in 
accordance with subpart 61.30 of this part.
    (c) All controls, safety devices, and other control system equipment 
must be tested and inspected to verify their proper design, 
construction, installation, and operation.
    (d) All tests must be performed after installation of the automatic 
auxiliary boiler and its control system(s) aboard the vessel.
    (e) As far as practicable, test techniques must not simulate 
monitored system conditions by misadjustment, artificial signals, 
improper wiring, tampering, or revision of the system tested. The use of 
a synthesized signal or condition applied to a sensor is acceptable if 
the required test equipment is maintained in good working order and is 
periodically calibrated. Proper operation and proper calibration of test 
equipment must be demonstrated to the Officer in Charge, Marine 
Inspection.



Sec. 61.35-3  Required tests and checks.

    (a) Tests and checks must include the following:
    (1) Safety (Programming) controls. Safety controls must control and 
cycle the unit in the proper manner and sequence. Proper prepurge, 
ignition, postpurge, and modulation must be verified. All time intervals 
must be verified.
    (2) Flame safeguard. The flame safeguard system must be tested by 
causing flame and ignition failures. Operation of the audible alarm and 
visible indicator must be verified. The shutdown times must be verified.
    (3) Fuel supply controls. Satisfactory shutdown operation of the two 
fuel control solenoid valves must be verified. No visible leakage from 
the valves into the burner(s) must be verified.
    (4) Fuel oil pressure limit control. A safety shutdown must be 
initiated by lowering the fuel oil pressure below the value required for 
safe combustion. System shutdown and the need for manual reset prior to 
automatic startup must be verified.
    (5) Fuel oil temperature limit control. (Units designed to burn 
heavy fuel oil.) A safety shutdown must be initiated by lowering the 
fuel oil temperature below the designed temperature. System shutdown and 
the need for manual reset prior to automatic startup must be verified.
    (6) Combustion controls. Smooth and stable operation of the 
combustion controls must be verified.
    (7) Draft limit control. The draft loss interlock switch must be 
tested to ensure proper operation. The draft limit control must cause 
burner shutdown and prevent startup when an inadequate air volume is 
supplied to the burner(s).
    (8) Limit controls. Shutdown caused by the limit controls must be 
verified.
    (9) Water level controls. Water level controls must be tested by 
slowly lowering the water level in the boiler. Each operating water 
level control must be individually tested. The upper low water cutoff 
and the lower low water cutoff must each be tested. The audible alarm 
and visible indicator associated with the lower low water cutoff must be 
tested. The manual reset device must be tested after the lower low water 
cutoff has been activated.
    (10) Feed water flow controls. The feed water flow limit device 
(found on

[[Page 286]]

steam boilers and water heaters without water level controls) must be 
tested by interrupting the feed water supply. Manual reset must be 
required prior to restarting the boiler.
    (11) Low voltage test. The fuel supply to the burners must 
automatically shut off when the supply voltage is lowered.
    (12) Switches. All switches must be tested to verify satisfactory 
operation.



Subpart 61.40--Design Verification and Periodic Testing of Vital System 
                               Automation

Source: CGD 81-030, 53 FR 17837, May 18, 1988, unless otherwise noted.



Sec. 61.40-1  General.

    (a) All automatically or remotely controlled or monitored vital 
systems addressed by part 62 of this subchapter must be subjected to 
tests and inspections to evaluate the operation and reliability of 
controls, alarms, safety features, and interlocks. Test procedures must 
be submitted to the Coast Guard for approval.
    (b) Persons designated by the owner of the vessel shall conduct all 
tests and the Design Verification and Periodic Safety tests shall be 
witnessed by the Coast Guard.
    (c) Design Verification and Periodic Safety test procedure documents 
approved by the Coast Guard must be retained aboard the vessel.



Sec. 61.40-3  Design verification testing.

    (a) Tests must verify that automated vital systems are designed, 
constructed, and operate in accordance with all applicable requirements 
of part 62 of this subchapter. The tests must be based upon the failure 
analysis, if required by Sec. 62.20-3(b) of this subchapter, functional 
performance requirements, and the Periodic Safety tests of Sec. 61.40-6.
    (b) Tests must be performed immediately after the installation of 
the automated equipment or before the issuance of the initial 
Certificate of Inspection.



Sec. 61.40-6  Periodic safety tests.

    (a) Periodic Safety tests must demonstrate the proper operation of 
the primary and alternate controls, alarms, power sources, transfer 
override arrangements, interlocks, and safety controls. Systems 
addressed must include fire detection and extinguishing, flooding 
safety, propulsion, maneuvering, electric power generation and 
distribution, and emergency internal communications.
    (b) Tests must be conducted at periodic intervals specified by the 
Coast Guard to confirm that vital systems and safety features continue 
to operate in a safe, reliable manner.

    Note: Normally, these tests are conducted annually.



Sec. 61.40-10  Test procedure details.

    (a) Test procedure documents must be in a step-by-step or checkoff 
list format. Each test instruction must specify equipment status, 
apparatus necessary to perform the tests, safety precautions, safety 
control and alarm setpoints, the procedure to be followed, and the 
expected test result.
    (b) Test techniques must not simulate monitored system conditions by 
mis-adjustment, artificial signals, improper wiring, tampering, or 
revision of the system unless the test would damage equipment or 
endanger personnel. In the latter case, the use of a synthesized signal 
or condition applied to the sensor is acceptable if test equipment is 
maintained in good working order and is periodically calibrated to the 
satisfaction of the Officer in Charge, Marine Inspection. Other test 
techniques must be approved by the Commandant (G-MSE).

[CGD 80-064, 49 FR 32193, Aug. 13, 1984, as amended by CGD 95-072, 60 FR 
50463, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



PART 62--VITAL SYSTEM AUTOMATION--Table of Contents




                    Subpart 62.01-General Provisions

Sec.
62.01-1  Purpose.
62.01-3  Scope.
62.01-5  Applicability.

[[Page 287]]

                 Subpart 62.05-Reference specifications

62.05-1  Incorporation by reference.

                        Subpart 62.10-Terms used

62.10-1  Definitions.

                        Subpart 62.15-Equivalents

62.15-1  Conditions under which equivalent may be used.

                      Subpart 62.20-Plan submittal

62.20-1  Plans for approval.
62.20-3  Plans for information.
62.20-5  Self-certification.

   Subpart 62.25-General Requirements for All Automated Vital Systems

62.25-1  General.
62.25-5  All control systems.
62.25-10  Manual alternate control systems.
62.25-15  Safety control systems.
62.25-20  Instrumentation, alarms, and centralized stations.
62.25-25  Programable systems and devices.
62.25-30  Environmental design standards.

   Subpart 62.30-Reliability and Safety Criteria, All Automated Vital 
                                 Systems

62.30-1  Failsafe.
62.30-5  Independence.
62.30-10  Testing.

Subpart 62.35-Requirements for Specific Types of Automated Vital Systems

62.35-1  General.
62.35-5  Remote propulsion control systems.
62.35-10  Flooding safety.
62.35-15  Fire safety.
62.35-20  Oil-fired main boilers.
62.35-35  Internal combustion engine starting systems.
62.35-40  Fuel systems.
62.35-50  Tabulated monitoring and safety control requirements for 
          specific systems.

          Subpart 62.50-Automated Self-propelled Vessel Manning

62.50-1  General.
62.50-20  Additional requirements for minimally attended machinery 
          plants.
62.50-30  Additional requirements for periodically unattended machinery 
          plants.

    Authority: 46 U.S.C. 3306, 3703, 8105; E.O. 12234, 45 FR 58801, 3 
CFR, 1980 Comp., p. 277; 49 CFR 1.46.

    Source: CGD 81-030, 53 FR 17838, May 18, 1988, unless otherwise 
noted.



                    Subpart 62.01--General Provisions



Sec. 62.01-1  Purpose.

    The purpose of this part is to make sure that the safety of a vessel 
with automated vital systems, in maneuvering and all other sailing 
conditions, is equal to that of the vessel with the vital systems under 
direct manual operator supervision.



Sec. 62.01-3  Scope.

    (a) This part contains the minimum requirements for vessel automated 
vital systems. Specifically, this part contains--
    (1) In subpart 62.25, the general requirements for all vital system 
automation;
    (2) In subpart 62.30, the criteria used to evaluate the designed 
reliability and safety of all automated vital systems;
    (3) In subpart 62.35, the minimum additional equipment, 
configuration, and functional requirements necessary when certain vital 
systems are automated; and
    (4) In subpart 62.50, the minimum additional requirements when 
automated systems are provided to replace specific personnel or to 
reduce overall crew requirements.



Sec. 62.01-5  Applicability.

    (a) Vessels. This part applies to self-propelled vessels of 500 
gross tons and over that are certificated under subchapters D, I, or U 
and to self-propelled vessels of 100 gross tons and over that are 
certificated under subchapter H.
    (b) Systems and Equipment. Except as noted in Sec. 62.05-5(c), this 
part applies to automation of vital systems or equipment that--
    (1) Is automatically controlled or monitored;
    (2) Is remotely controlled or monitored; or
    (3) Utilizes automation for the purpose of replacing specific 
personnel or to reduce overall crew requirements.
    (c) Exceptions. This part does not apply to the following systems 
and equipment unless they are specifically addressed or unless their 
failure would degrade the safety and reliability of the systems required 
by this part:

[[Page 288]]

    (1) Automatic auxiliary heating equipment (see part 63 of this 
subchapter).
    (2) Steering systems (see subparts 58.25 and 111.93 of this 
chapter).
    (3) Non-vital and industrial systems.
    (4) The communication and alarm systems in part 113 of this chapter.
    (d) Central control rooms. The requirements of subpart 62.50 only 
apply to vessels automated to replace specific personnel or to reduce 
overall crew requirements, except where the main propulsion or ship 
service electrical generating plants are automatically or remotely 
controlled from a control room. In this case, Sec. 62.50-20(a)(3) 
(except the provision in paragraph 62.50-20(a)(3)(ii) relating to 
electrical power distribution), (b)(3), (c), (e)(1), (e)(2), (e)(4), and 
(f)(2) apply, regardless of manning.



                 Subpart 62.05--Reference Specifications



Sec. 62.05-1  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register. To enforce 
any edition other than the one listed in paragraph (b) of this section, 
notice of the change must be published in the Federal Register and the 
material made available to the public. All approved material is on file 
at the Office of the Federal Register, Washington, DC 20408 and at the 
Marine Safety and Environmental Protection (G-MSE), U.S. Coast Guard 
Headquarters Building, 2100 Second Street SW., Washington, DC 20593-
0001.
    (b) The material approved for incorporation by reference in this 
part is:
    (1) Rules for Building and Classing Steel Vessels, 1986, issued by 
the American Bureau of Shipping. This document is available from: 
American Bureau of Shipping, Two World Trade Center, 106th Floor, New 
York, NY 10048. Sections affected by this incorporation by reference 
are: 62.25-1(c), 62.25-5(a), 62.25-30(a)(1), (a)(2), (a)(3), (a)(5), 
62.35-5(d), 62.35-35(a), 62.35-40(c), 62.35-50, 62.50-30(c), and 62.50-
30(k).

[CGD 81-030, 53 FR 17838, May 18, 1988, as amended by CGD 95-072, 60 FR 
50463, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



                        Subpart 62.10--Terms Used



Sec. 62.10-1  Definitions.

    (a) For the purpose of this part:
    Alarm means an audible and visual indication of a hazardous or 
potentially hazardous condition that requires attention.
    Automated means the use of automatic or remote control, 
instrumentation, or alarms.
    Automatic control means self-regulating in attaining or carrying out 
an operator-specified equipment response or sequence.
    Boiler low-low water level is the minimum safe level in the boiler, 
in no case lower than that visible in the gage glass (see Sec. 52.01-110 
of this chapter, Water Level Indicators).
    Engineering Control Center (ECC) means the centralized engineering 
control, monitoring, and communications location.
    Failsafe means that upon failure or malfunction of a component, 
subsystem, or system, the output automatically reverts to a pre-
determined design state of least critical consequence. Typical failsafe 
states are listed in Table 62.10-1(a).

                Table 62.10-1(a)--Typical Failsafe States               
------------------------------------------------------------------------
            System or component               Preferred failsafe state  
------------------------------------------------------------------------
Cooling water valve.......................  As is or open.              
Alarm system..............................  Annunciate.                 
Safety system.............................  Shut down, limited, or as is
                                             & alarm.                   
Burner valve..............................  Closed.                     
Propulsion speed control..................  As is.                      
Feedwater valve...........................  As is or open.              
Controllable pitch propeller..............  As is.                      
Propulsion safety trip....................  As is & alarm.              
Fuel tank valve...........................  See Sec.  56.50-60(d).      
------------------------------------------------------------------------

    Flooding safety refers to flooding detection, watertight integrity, 
and dewatering systems.
    Independent refers to equipment arranged to perform its required 
function regardless of the state of operation, or failure, of other 
equipment.
    Limit control means a function of an automatic control system to 
restrict operation to a specified operating range or sequence without 
stopping the machinery.
    Local control means operator control from a location where the 
equipment

[[Page 289]]

and its output can be directly manipulated and observed, e.g., at the 
switchboard, motor controller, propulsion engine, or other equipment.
    Manual control means operation by direct or power-assisted operator 
intervention.
    Monitor means the use of direct observation, instrumentation, 
alarms, or a combination of these to determine equipment operation.
    Remote control means non-local automatic or manual control.
    Safety trip control system means a manually or automatically 
operated system that rapidly shuts down another system or subsystem.
    System means a grouping or arrangement of elements that interact to 
perform a specific function and typically includes the following, as 
applicable:
    A fuel or power source.
    Power conversion elements.
    Control elements.
    Power transmission elements.
    Instrumentation.
    Safety control elements.
    Conditioning elements.
    Vital system or equipment is essential to the safety of the vessel, 
its passengers and crew. This typically includes, but is not limited to, 
the following:
    Fire detection, alarm, and extinguishing systems.
    Flooding safety systems.
    Ship service and emergency electrical generators, switchgear, and 
motor control circuits serving vital electrical loads.
    The emergency equipment and systems listed in Sec. 112.15 of this 
chapter.
    Propulsion systems, including those provided to meet Sec. 58.01-35.
    Steering systems.



                       Subpart 62.15--Equivalents



Sec. 62.15-1  Conditions under which equivalents may be used.

    (a) The Coast Guard accepts a substitute or alternate for the 
requirements of this part if it provides an equivalent level of safety 
and reliability. Demonstration of functional equivalence must include 
comparison of a qualitative failure analysis based on the requirements 
of this part with a comparable analysis of the proposed substitute or 
alternate.



                      Subpart 62.20--Plan Submittal



Sec. 62.20-1  Plans for approval.

    (a) The following plans must be submitted to the Coast Guard for 
approval in accordance with Sec. 50.20-5 and Sec. 50.20-10 of this 
chapter:
    (1) A general arrangement plan of control and monitoring equipment, 
control locations, and the systems served.
    (2) Control and monitoring console, panel, and enclosure layouts.
    (3) Schematic or logic diagrams including functional relationships, 
a written description of operation, and sequences of events for all 
modes of operation.
    (4) A description of control or monitoring system connections to 
non-vital systems.
    (5) A description of programable features.
    (6) A description of built-in test features and diagnostics.
    (7) Design Verification and Periodic Safety test procedures 
described in subpart 61.40 of this chapter.
    (8) Control system normal and emergency operating instructions.



Sec. 62.20-3  Plans for information.

    (a) One copy of the following plans must be submitted to the Officer 
in Charge, Marine Inspection, for use in the evaluation of automated 
systems provided to replace specific personnel or to reduce overall crew 
requirements:
    (1) Proposed manning, crew organization and utilization, including 
routine maintenance, all operational evolutions, and emergencies.
    (2) A planned maintenance program for all vital systems.
    (b) One copy of a qualitative failure analysis must be submitted in 
accordance with Sec. 50.20-5 of this chapter for the following:
    (1) Propulsion controls.
    (2) Microprocessor-based system hardware.
    (3) Safety controls.
    (4) Automated electric power management.

[[Page 290]]

    (5) Automation required to be independent that is not physically 
separate.
    (6) Any other automation that, in the judgement of the Commandant, 
potentially constitutes a safety hazard to the vessel or personnel in 
case of failure.

    Note: The qualitative failure analysis is intended to assist in 
evaluating the safety and reliability of the design. It should be 
conducted to a level of detail necessary to demonstrate compliance with 
applicable requirements and should follow standard qualitative analysis 
procedures. Assumptions, operating conditions considered, failures 
considered, cause and effect relationships, how failures are detected by 
the crew, alternatives available to the crew, and possible design 
verification tests necessary should be included. Questions regarding 
failure analysis should be referred to the Marine Safety Center at an 
early stage of design.



Sec. 62.20-5  Self-certification.

    (a) The designer or manufacturer of an automated system shall 
certify to the Coast Guard, in writing, that the automation is designed 
to meet the environmental design standards of Sec. 62.25-30. Plan 
review, shipboard testing, or independent testing to these standards is 
not required.

    Note: Self-certification should normally accompany plan submittal.



   Subpart 62.25--General Requirements for All Automated Vital Systems



Sec. 62.25-1  General.

    (a) Vital systems that are automatically or remotely controlled must 
be provided with--
    (1) An effective primary control system;
    (2) A manual alternate control system;
    (3) A safety control system, if required by Sec. 62.25-15;
    (4) Instrumentation to monitor system parameters necessary for the 
safe and effective operation of the system; and
    (5) An alarm system if instrumentation is not continuously monitored 
or is inappropriate for detection of a failure or unsafe condition.
    (b) Automation systems or subsystems that control or monitor more 
than one safety control, interlock, or operating sequence must perform 
all assigned tasks continuously, i.e., the detection of unsafe 
conditions must not prevent control or monitoring of other conditions.
    (c) Vital control and alarm system consoles and similar enclosures 
that rely upon forced cooling for proper system operation must meet 
section 41.23.2 of the American Bureau of Shipping's ``Rules for 
Building and Classing Steel Vessels.''



Sec. 62.25-5  All control systems.

    (a) Controls for engines and turbines equipped with jacking or 
turning gear must meet section 41.21.4 of the American Bureau of 
Shipping's ``Rules for Building and Classing Steel Vessels.''
    (b) Automatic control systems must be stable over the entire range 
of normal operation.
    (c) Inadvertent grounding of an electrical or electronic safety 
control system must not cause safety control operation or safety control 
bypassing.



Sec. 62.25-10  Manual alternate control systems.

    (a) Manual alternate control systems must--
    (1) Be operable in an emergency and after a remote or automatic 
primary control system failure;
    (2) Be suitable for manual control for prolonged periods;
    (3) Be readily accessible and operable; and
    (4) Include means to override automatic controls and interlocks, as 
applicable.
    (b) Permanent communications must be provided between primary remote 
control locations and manual alternate control locations if operator 
attendance is necessary to maintain safe alternate control.

    Note: Typically, this includes main boiler fronts and local 
propulsion control.



Sec. 62.25-15  Safety control systems.

    (a) Minimum safety trip controls required for specific types of 
automated vital systems are listed in Table 62.35-50.


[[Page 291]]


    Note: Safety control systems include automatic and manual safety 
trip controls and automatic safety limit controls.

    (b) Safety trip controls must not operate as a result of failure of 
the normal electrical power source unless it is determined to be the 
failsafe state.
    (c) Automatic operation of a safety control must be alarmed in the 
machinery spaces and at the cognizant remote control location.
    (d) Local manual safety trip controls must be provided for all main 
boilers, turbines, and internal combustion engines.
    (e) Automatic safety trip control systems must--
    (1) Be provided where there is an immediate danger that a failure 
will result in serious damage, complete breakdown, fire, or explosion;
    (2) Require manual reset prior to renewed operation of the 
equipment; and
    (3) Not be provided if safety limit controls provide a safe 
alternative and trip would result in loss of propulsion.



Sec. 62.25-20  Instrumentation, alarms, and centralized stations.

    (a) General. Minimum instrumentation and alarms required for 
specific types of automated vital systems are listed in Table 62.35-50.
    (b) Instrumentation Location. (1) Manual control locations, 
including remote manual control and manual alternate control, must be 
provided with the instrumentation necessary for safe operation from that 
location.

    Note: Typically, instrumentation includes means to monitor the 
output of the monitored system.

    (2) Systems with remote instrumentation must have provisions for the 
installation of instrumentation at the monitored system equipment.
    (3) The status of automatically or remotely controlled vital 
auxiliaries, power sources, switches, and valves must be visually 
indicated in the machinery spaces or the cognizant remote control 
location, as applicable.

    Note: Status indicators include run, standby, off, open, closed, 
tripped, and on, as applicable. Status indicators at remote control 
locations other than the ECC, if provided, may be summarized. Equipment 
normally provided with status indicators are addressed in Table 62.35-50 
and subparts 58.01, 56.50, and 112.45.

    (4) Sequential interlocks provided in control systems to ensure safe 
operation, such as boiler programing control or reversing of propulsion 
diesels, must have summary indicators in the machinery spaces and at the 
cognizant control location to show if the interlocks are satisfied.
    (5) Instrumentation listed in Table 62.35-50 must be of the 
continuous display type or the demand display type. Displays must be in 
the ECC or in the machinery spaces if an ECC is not provided.
    (c) Instrumentation details. Demand instrumentation displays must be 
clearly readable and immediately available to the operator.
    (d) Alarms. (1) All alarms must clearly distinguish among--
    (i) Normal, alarm, and acknowledged alarm conditions; and
    (ii) Fire, general alarm, CO2/halon, vital machinery, flooding, 
engineers' assistance-needed, and non-vital alarms.
    (2) Required alarms in high ambient noise areas must be supplemented 
by visual means, such as rotating beacons, that are visible throughout 
these areas. Red beacons must only be used for general or fire alarm 
purposes.
    (3) Automatic transfer to required backup or redundant systems or 
power sources must be alarmed in the machinery spaces.
    (4) Flooding safety, fire, loss of power, and engineers' assistance-
needed alarms extended from the machinery spaces to a remote location 
must not have a duty crewmember selector.

    Note: Other alarms may be provided with such a selector, provided 
there is no off position.

    (5) Automation alarms must be separate and independent of the 
following:
    (i) The fire detection and alarm systems.
    (ii) The general alarm.
    (iii) CO2/halon release alarms.
    (6) Failure of an automatic control, remote control, or alarm system 
must be immediately alarmed in the machinery spaces and at the ECC, if 
provided.
    (e) Alarm details. (1) All alarms must--

[[Page 292]]

    (i) Have a manual acknowledgement device (No other means to reduce 
or eliminate the annunciated signal may be provided except dimmers 
described in paragraph (g)(2) of this section);
    (ii) Be continuously powered;
    (iii) Be provided with a means to test audible and visual 
annunciators;
    (iv) Provide for normal equipment starting and operating transients 
and vessel motions, as applicable, without actuating the alarm;
    (v) Be able to simultaneously indicate more than one alarm 
condition, as applicable;
    (vi) Visually annunciate until the alarm is manually acknowledged 
and the alarm condition is cleared;
    (vii) Audibly annunciate until manually acknowledged;
    (viii) Not prevent annunciation of subsequent alarms because of 
previous alarm acknowledgement; and
    (ix) Automatically reset to the normal operating condition only 
after the alarm has been manually acknowledged and the alarm condition 
is cleared.
    (2) Visual alarms must initially indicate the equipment or system 
malfunction without operator intervention.
    (3) Power failure alarms must monitor on the load side of the last 
supply protective device.
    (f) Summarized and grouped alarms. Visual alarms at a control 
location that are summarized or grouped by function, system, or item of 
equipment must--
    (1) Be sufficiently specific to allow any necessary action to be 
taken; and
    (2) Have a display at the equipment or an appropriate control 
location to identify the specific alarm condition or location.
    (g) Central control locations. (1) Central control locations must--
    (i) Be arranged to allow the operator to safely and efficiently 
communicate, control, and monitor the vital systems under normal and 
emergency conditions, with a minimum of operator confusion and 
distraction;
    (ii) Be on a single deck level; and
    (iii) Co-locate control devices and instrumentation to allow visual 
assessment of system response to control input.
    (2) Visual alarms and instruments on the navigating bridge must not 
interfere with the crew's vision. Dimmers must not eliminate visual 
indications.
    (3) Alarms and instrumentation at the main navigating bridge control 
location must be limited to those that require the attention or action 
of the officer on watch, are required by this chapter, or that would 
result in increased safety.



Sec. 62.25-25  Programable systems and devices.

    (a) Programable control or alarm system logic must not be altered 
after Design Verification testing without the approval of the cognizant 
Officer in Charge, Marine Inspection (OCMI). (See subpart 61.40 of this 
subchapter, Design Verification Tests). Safety control or automatic 
alarm systems must be provided with means, acceptable to the cognizant 
OCMI, to make sure setpoints remain within the safe operating range of 
the equipment.
    (b) Operating programs for microprocessor-based or computer-based 
vital control, alarm, and monitoring systems must be stored in non-
volatile memory and automatically operate on supply power resumption.
    (c) If a microprocessor-based or computer-based system serves both 
vital and non-vital systems, hardware and software priorities must favor 
the vital systems.
    (d) At least one copy of all required manuals, records, and 
instructions for automatic or remote control or monitoring systems 
required to be aboard the vessel must not be stored in electronic or 
magnetic memory.

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988]



Sec. 62.25-30  Environmental design standards.

    (a) All automation must be suitable for the marine environment and 
must be designed and constructed to operate indefinitely under the 
following conditions:
    (1) Ship motion and vibration described in section 41.37 of the 
American Bureau of Shipping's ``Rules for Building and Classing Steel 
Vessels.''


[[Page 293]]


    Note: Inclination requirements for fire and flooding safety systems 
are described in Sec. 112.05-5(c) of this chapter.

    (2) Ambient air temperatures described in section 41.29.1 and 
41.29.2 of the American Bureau of Shipping's ``Rules for Building and 
Classing Steel Vessels.''
    (3) Electrical voltage and frequency tolerances described in section 
41.29.3 of the American Bureau of Shipping's ``Rules for Building and 
Classing Steel Vessels.''
    (4) Relative humidity of 0 to 95% at  45  deg.C.
    (5) Hydraulic and pneumatic pressure variations described in section 
41.39.3e of the American Bureau of Shipping's ``Rules for Building and 
Classing Steel Vessels.''

    Note: Considerations should include normal dynamic conditions that 
might exceed these values, such as switching, valve closure, power 
supply transfer, starting, and shutdown.

    (b) Low voltage electronics must be designed with due consideration 
for static discharge, electromagnetic interference, voltage transients, 
fungal growth, and contact corrosion.



  Subpart 62.30--Reliability and Safety Criteria, All Automated Vital 
                                 Systems



Sec. 62.30-1  Failsafe.

    (a) The failsafe state must be evaluated for each subsystem, system, 
or vessel to determine the least critical consequence.
    (b) All automatic control, remote control, safety control, and alarm 
systems must be failsafe.



Sec. 62.30-5  Independence.

    (a) Single non-concurrent failures in control, alarm, or 
instrumentation systems, and their logical consequences, must not 
prevent sustained or restored operation of any vital system or systems.
    (b)(1) Except as provided in paragraphs (b)(2) and (b)(3) of this 
section, primary control, alternate control, safety control, and alarm 
and instrumentation systems for any vital system must be independent of 
each other.
    (2) Independent sensors are not required except that sensors for 
primary speed, pitch, or direction of rotation control in closed loop 
propulsion control systems must be independent and physically separate 
from required safety control, alarm, or instrumentation sensors.
    (3) The safety trip control of Sec. 62.35--5(b)(2) must be 
independent and physically separate from all other systems.
    (c) Two independent sources of power must be provided for all 
primary control, safety control, instrumentation and alarm systems. 
Failure of the normal source of power must actuate an alarm in the 
machinery spaces. One source must be from the emergency power source 
(see part 112 of this chapter, Emergency Lighting and Power Systems) 
unless one of the sources is--
    (1) Derived from the power supply of the system being controlled or 
monitored;
    (2) A power take-off of that system; of
    (3) An independent power source equivalent to the emergency power 
source.



Sec. 62.30-10  Testing.

    (a) Automated vital systems must be tested in accordance with 
subpart 61.40 of this chapter.
    (b) On-line built-in test equipment must not lock out or override 
safety trip control systems. This equipment must indicate when it is 
active.



   Subpart 62.35--Requirements for Specific Types of Automated Vital 
                                 Systems



Sec. 62.35-1  General.

    (a) Minimum instrumentation, alarms, and safety controls required 
for specific types of automated vital systems are listed in Table 62.35-
50.
    (b) Automatic propulsion systems, automated electric power 
management systems, and all associated subsystems and equipment must be 
capable of meeting load demands from standby to full system rated load, 
under steady state and maneuvering conditions, without need for manual 
adjustment or manipulation.

[[Page 294]]



Sec. 62.35-5  Remote propulsion control systems.

    (a) Manual propulsion control. All vessels having remote propulsion 
control from the navigating bridge, an ECC or maneuvering platform, or 
elsewhere must have a manual alternate propulsion control located at the 
equipment.

    Note: Separate local control locations may be provided for each 
independent propeller.

    (b) Centralized propulsion control equipment. Navigating bridge, 
ECC, maneuvering platform, and manual alternate control locations must 
include--
    (1) Control of the speed and direction of thrust for each 
independent propeller controlled;
    (2) A guarded manually actuated safety trip control (which stops the 
propelling machinery) for each independent propeller controlled;
    (3) Shaft speed and thrust direction indicators for each independent 
propeller controlled;
    (4) The means to pass propulsion orders required by Sec. 113.30-5 
and Sec. 113.35-3 of this chapter; and
    (5) The means required by paragraph (d) of this section to achieve 
control location transfer and independence.
    (c) Main navigating bridge propulsion control. (1) Navigating bridge 
remote propulsion control must be performed by a single control device 
for each independent propeller. Control must include automatic 
performance of all associated services, and must not permit rate of 
movement of the control device to overload the propulsion machinery.
    (2) On vessels propelled by steam turbines, the navigation bridge 
primary control system must include safety limit controls for high and 
low boiler water levels and low steam pressure. Actuation of these 
limits must be alarmed on the navigating bridge and at the maneuvering 
platform or ECC.
    (3) On vessels propelled by internal combustion engines, an alarm 
must annunciate on the navigating bridge and at the maneuvering platform 
or ECC, if provided, to indicate starting capability less then 50% of 
that required by Sec. 62.35-35(a). If the primary remote control system 
provides automatic starting, the number of automatic consecutive 
attempts that fail to produce a start must be limited to reserve 50% of 
the required starting capability.
    (d) Control location transfer. Control location transfer must meet 
sections 41.19.3 and 41.19.4 of the American Bureau of Shipping's 
``Rules for Building and Classing Steel Vessels.'' Manual alternate 
propulsion control locations must be capable of overriding and operating 
independent of all remote and automatic control locations.
    (e) Control system details. (1) Each operator control device must 
have a detent at the zero thrust position.
    (2) Propulsion machinery automatic safety trip control operation 
must only occur when continued operation could result in serious damage, 
complete breakdown, or explosion of the equipment. Other than the 
overrides mentioned in Sec. 62.25-10(a)(4) and temporary overrides 
located at the main navigating bridge control location, overrides of 
these safety trip controls are prohibited. Operation of permitted 
overrides must be alarmed at the navigating bridge and at the 
maneuvering platform or ECC, as applicable, and must be guarded against 
inadvertent operation.
    (3) Remote propulsion control systems must be failsafe by 
maintaining the preset (as is) speed and direction of thrust until local 
manual or alternate manual control is in operation, or the manual safety 
trip control operates. Failure must activate alarms on the navigating 
bridge and in the machinery spaces.

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988]



Sec. 62.35-10  Flooding safety.

    (a) Automatic bilge pumps must--
    (1) Be provided with bilge high level alarms that annunciate in the 
machinery spaces and at a manned control location and are independent of 
the pump controls;
    (2) Be monitored to detect excessive operation in a specified time 
period; and
    (3) Meet all applicable pollution control requirements.
    (b) Remote controls for flooding safety equipment must remain 
functional under flooding conditions to the extent required for the 
associated equipment

[[Page 295]]

by Sec. 56.50-50 and Sec. 56.50-95 of this chapter.
    (c) Remote bilge level sensors, where provided, must be located to 
detect flooding at an early stage and to provide redundant coverage.



Sec. 62.35-15  Fire safety.

    (a) All required fire pump remote control locations must include the 
controls necessary to charge the firemain and--
    (1) A firemain pressure indicator; or
    (2) A firemain low pressure alarm.



Sec. 62.35-20  Oil-fired main boilers.

    (a) General. (1) All main boilers, regardless of intended mode of 
operation, must be provided with the automatic safety trip control 
system(s) of paragraphs (h)(1), (h)(2)(i), (h)(2) (ii), and (i) of this 
section to prevent unsafe conditions after light off.
    (2) Manual alternate control of boilers must be located at the 
boiler front.
    (3) A fully automatic main boiler must include--
    (i) Automatic combustion control;
    (ii) Programing control;
    (iii) Automatic feedwater control;
    (iv) Safety controls; and
    (v) An alarm system.
    (4) Following system line-up and starting of auxiliaries, fully 
automatic main boilers must only require the operator to initiate the 
following sequences:
    (i) Boiler pre-purge.
    (ii) Trial for ignition of burners subsequent to successful initial 
burner light-off.
    (iii) Normal shutdown.
    (iv) Manual safety trip control operation.
    (v) Adjustment of primary control setpoints.
    (5) All requirements for programing control subsystems and safety 
control systems must be met when a boiler--
    (i) Automatically sequences burners;
    (ii) Is operated from a location remote from the boiler front; or
    (iii) Is fully automatic.
    (6) Where light oil pilots are used, the programing control and 
burner safety trip controls must be provided for the light oil system. 
Trial for ignition must not exceed 15 seconds and the main burner trial 
for ignition must not proceed until the pilot flame is proven.

    Note: Light oil is defined inSec. 63.05-75(a) of this chapter.

    (b) Feedwater control. Automatic feedwater control subsystems must 
sense, at a minimum, boiler water level and steam flow.
    (c) Combustion control. Automatic combustion control subsystems must 
provide--
    (1) An air/fuel ratio which ensures complete combustion and stable 
flame with the fuel in use, under light off, steady state, and transient 
conditions; and
    (2) Stable boiler steam pressure and outlet temperatures under 
steady state and transient load conditions; and
    (3) A low fire interlock to prevent high firing rates and 
superheater damage during boiler warm up.
    (d) Programing control. The programing control must provide a 
programed sequence of interlocks for the safe ignition and normal 
shutdown of the boiler burners. The programing control must prevent 
ignition if unsafe conditions exist and must include the following 
minimum sequence of events and interlocks:
    (1) Prepurge. Boilers must undergo a continuous purge of the 
combustion chamber and convecting spaces to make sure of a minimum of 5 
changes of air. The purge must not be less than 15 seconds in duration, 
and must occur immediately prior to the trial for ignition of the 
initial burner of a boiler. All registers and dampers must be open and 
an air flow of at least 25 percent of the full load volumetric air flow 
must be proven before the purge period commences. The prepurge must be 
complete before trial for ignition of the initial burner.

    Note: A pre-purge is not required immediately after a complete post-
purge.

    (2) Trial for ignition and ignition. (i) Only one burner per boiler 
is to be in trial for ignition at any time.
    (ii) Total boiler air flow during light off must be sufficient to 
prevent pocketing and explosive accumulations of combustible gases.

[[Page 296]]

    (iii) The burner igniter must be in position and proven energized 
before admission of fuel to the boiler. The igniter must remain 
energized until the burner flame is established and stable, or until the 
trial for ignition period ends.
    (iv) The trial for ignition period must be as short as practical for 
the specific installation, but must not exceed 15 seconds.
    (v) Failure of the burner to ignite during a trial for ignition must 
automatically actuate the burner safety trip controls.
    (3) Post-purge. (i) Immediately after normal shutdown of the boiler, 
an automatic purge of the boiler equal to the volume and duration of the 
prepurge must occur.
    (ii) Following boiler safety trip control operation, the air flow to 
the boiler must not automatically increase. Post purge in such cases 
must be under manual control.
    (e) Burner fuel oil valves. Each burner must be provided with a 
valve that is--
    (1) Automatically closed by the burner or boiler safety trip control 
system; and
    (2) Operated by the programming control or combustion control 
subsystems, as applicable.
    (f) Master fuel oil valves. Each boiler must be provided with a 
master fuel oil valve to stop fuel to the boiler automatically upon 
actuation by the boiler safety trip control system.
    (g) Valve closure time. The valves described in paragraphs (e) and 
(f) of this section must close within 4 seconds of automatic detection 
of unsafe trip conditions.
    (h) Burner safety trip control system. (1) Each burner must be 
provided with at least one flame detector.
    (2) The burner valve must automatically close when--
    (i) Loss of burner flame occurs;
    (ii) Actuated by the boiler safety trip control system;
    (iii) The burner is not properly seated or in place; or
    (iv) Trial for ignition fails, if a programing control is provided.
    (i) Boiler safety trip control system. (1) Each boiler must be 
provided with a safety trip control system that automatically closes the 
master and all burner fuel oil valves upon--
    (i) Boiler low-low water level;
    (ii) Inadequate boiler air flow to support complete combustion;
    (iii) Loss of boiler control power;
    (iv) Manual safety trip operation; or
    (v) Loss of flame at all burners.
    (2) The low-low water level safety trip control must account for 
normal vessel motions and operating transients.



Sec. 62.35-35  Internal combustion engine starting systems.

    (a) The starting system for propulsion engines and ship service 
generator prime movers required to automatically start must meet 
sections 34.23.3, 34.37.2, and 34.39 of the American Bureau of 
Shipping's ``Rules for Building and Classing Steel Vessels,'' except the 
sections referenced therein.



Sec. 62.35-40  Fuel systems.

    (a) Level alarms. Where high or low fuel tank level alarms are 
required, they must be located to allow the operator adequate time to 
prevent an unsafe condition.
    (b) Coal fuels. (1) Controls and instrumentation for coal systems 
require special consideration by the Commandant (G-MSE).
    (2) Interlocks must be provided to ensure a safe transfer of 
machinery operation from one fuel to another.
    (c) Automatic fuel heating. Automatic fuel heating arrangements must 
meet section 41.78.1 of the American Bureau of Shipping's ``Rules for 
Building and Classing Steel Vessels.''
    (d) Overflow prevention. Fuel oil day tanks, settlers, and similar 
fuel oil service tanks that are filled automatically or by remote 
control must be provided with a high level alarm that annunciates in the 
machinery spaces and either an automatic safety trip control or an 
overflow arrangement.

[CGD 81-030, 53 FR 17838, May 18, 1988, as amended by CGD 95-072, 60 FR 
50463, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



Sec. 62.35-50  Tabulated monitoring and safety control requirements for specific systems.

    (a) The minimum instrumentation, alarms, and safety controls 
required

[[Page 297]]

for specific types of systems are listed in Table 62.35-50.

     Table 62.35-50--Minimum System Monitoring and Safety Control Requirements for Specific Systems (Note 1)    
----------------------------------------------------------------------------------------------------------------
            System                   Service       Instrumentation        Alarm        Safety control     Notes 
----------------------------------------------------------------------------------------------------------------
Main (Propulsion) boiler......  (\1\)...........  (\1\)...........  (\1\)...........  ................       (2)
                                Supply casing     ................  Fire............  ................          
                                 and uptakes.                                                                   
                                Burner flame....  Status..........  Failure.........  Burner auto trip       (3)
                                Burner seating..  ................  Failure.........  ......ditto.....       (3)
                                Trial for         Status..........  Failure.........  ......ditto.....          
                                 ignition.                                                                      
                                Control power...  Available         Failure (low)...  ......ditto.....       (3)
                                                   (pressure).                                                  
                                ................  ................  ................  Manual trip.....       (3)
                                Burner valve....  Open/closed.....  ................  ................          
                                Low fire          Status..........  ................  ................          
                                 interlock.                                                                     
                                Program control   Status..........  ................  ................          
                                 interlock.                                                                     
      Main (Propulsion steam)   (\2\)...........  (\2\)...........  (\2\)...........  ................    (4, 5)
                      turbine.                                                                                  
                                ................  ................  ................  Manual trip.....          
Main propulsion, diesel.......  (\1\)...........  (\1\)...........  (\1\)...........  ................    (4, 5)
                                ................  ................  ................  Manual trip.....          
      Main propulsion, remote   ................  ................  Failure.........  ......ditto.....          
                      control.                                                                                  
                                Auto safety trip  ................  Activated.......  ................          
                                 override.                                                                      
                                Starting power..  Pressure          Low.............  Limit...........       (2)
                                                   (voltage).                                                   
                                Location in       Status..........  Override........  ................       (6)
                                 control.                                                                       
                                Shaft speed/      (\3\)...........  (\3\)...........  (\3\)...........          
                                 direction/pitch.                                                               
                                Clutch fluid....  Pressure........  Low.............  ................          
Main propulsion, electric.....  (\4\)...........  (\4\)...........  (\4\)...........  (\4\)...........       (7)
Main propulsion, shafting.....  Stern tube oil    ................  Low.............  ................          
                                 tank level.                                                                    
                                Line shaft        Temperature.....  High............  ................          
                                 bearing.                                                                       
                                ................  Forced            Low.............  ................          
                                                   lubrication                                                  
                                                   Pressure.                                                    
Main propulsion, controllable   Hydraulic oil...  Pressure........  High, Low.......  ................          
              pitch propeller.                                                                                  
                                ................  Temperature.....  High............  ................          
Generators....................  Ship service....  (\1\)...........  (\1\)...........  ................          
                                ................  Starting          Low.............  ................          
                                                   pressure/                                                    
                                                   voltage.                                                     
                                ................  ................  Tripped.........  ................          
                                Emergency.......  (\5\)...........  (\5\)...........  (\5\)...........          
                                Turbogenerator..  (1, 6\\)........  (1, 6\\)........  (\6\)...........          
                                ................  ................  ................  Manual trip.....          
                                Diesel..........  (1, 7\\)........  (1, 7\\)........  (\7\)...........       (5)
                                ................  ................  ................  Manual trip.....          
Auxiliary boiler..............  ................  Run.............  Trip............  ................      (12)
Gas turbine...................  (\8\)...........  (\8\)...........  (\8\)...........  (\8\)...........       (5)
Engines and turbines..........  Jacking/turning   Engaged.........  ................  ................       (8)
                                 gear.                                                                          
Fuel oil......................  (\9\)...........  (\9\)...........  (\9\)...........  ................          
                                Remote/auto fill  ................  High............  Auto trip or              
                                 level.                                                overflow                 
                                                                                       arrangement.             
                                Hi. press.        ................  High............  ................          
                                 leakage level.                                                                 
Bilge.........................  Pump remote       Run.............  ................  ................          
                                 control.                                                                       

[[Page 298]]

                                                                                                                
                                Pump auto         Run.............  Excessive         ................          
                                 control.                            operations.                                
                                Level...........  ................  High/location...  ................          
    Machinery space CL.3 W.T.   ................  Open/closed.....  ................  ................          
                        doors.                                                                                  
Fire detection................  Machinery spaces  ................  Space on fire...  ................       (9)
Fire main.....................  ................  Pressure........  Low.............  ................          
Personnel.....................  Deadman.........  ................  Fail to           ................      (10)
                                                                     acknowledge.                               
   General, control and alarm   Power supply....  Available         Failure (low)...  ................          
                      systems.                     (pressure).                                                  
                                System function.  ................  Failure.........  ................      (11)
                                Console air       ................  Failure.........  ................          
                                 conditioning.                                                                  
                                Built in test     Active..........  ................  ................          
                                 equipment.                                                                     
                                Sequential        Activated.......  ................  ................          
                                 interlock.                                                                     
                                Safety control..  ................  Activated.......  Auto trip/limit.      (11)
 Redundant auxiliary, system,   ................  Status..........  Auto transfer...  ................          
                 power supply.                                                                                  
----------------------------------------------------------------------------------------------------------------
\1\See ABS Table 41.1.                                                                                          
\2\See ABS Table 41.1, except Shaft Rollover.                                                                   
\3\See Sec.  113.37 of this chapter.                                                                            
\4\See subparts 111.33 and 111.35 of this chapter.                                                              
\5\See subparts 112.45 and 112.50 of this chapter.                                                              
\6\See Sec.  111.12-1(c) of this chapter.                                                                       
\7\See Sec.  111.12-1 (b), (c) of this chapter.                                                                 
\8\See Sec.  58.10-15(g) of this chapter.                                                                       
\9\See ABS Table 41.1, ``Additional Services.''                                                                 

                        Notes on Table 62.35-50:

    1. The monitoring and controls listed in this table are applicable 
if the system listed is provided or required. References to ABS Table 
41.1 apply to the ``Operation,'' ``Display,'' ``Alarm,'' and ``Notes'' 1 
through 12, except the reference to ACCU in Note 11.
    2. Safety limit controls must be provided in navigating bridge 
primary propulsion control systems. See Sec. 62.35-5(c).
    3. Safety trip controls and alarms must be provided for all main 
boilers, regardless of mode of operation. See Sec. 62.35-20(a).
    4. Loss of forced lubrication safety trip controls must be provided, 
as applicable.
    5. Override of overspeed and loss of forced lubrication pressure 
safety trip controls must not be provided. See Sec. 62.35-5(e)(2).
    6. Transfer interlocks must be provided.
    7. Semiconductor controlled rectifiers must have current limit 
controls.
    8. Interlocks must be provided. See Sec. 62.25-5(a).
    9. See subparts 113.10, 161.002, and fire protection requirements of 
the applicable subchapters. The use of thermal detectors alone is 
subject to special consideration by the Commandant (G-MTH). Flame 
detectors may only be used in conjunction with smoke or heat detectors.
    10. See Sec. 62.50-20(b)(1).
    11. Alarms and controls must be failsafe. See Sec. 62.30-1.
    12. Vital auxiliary boilers only. Also see part 63.

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988]



         Subpart 62.50--Automated Self-propelled Vessel Manning



Sec. 62.50-1  General.

    (a) Where automated systems are provided to replace specific 
personnel in the control and observation of the engineering plant and 
spaces, or reduce overall crew requirements, the arrangements must make 
sure that under all sailing conditions, including maneuvering, the 
safety of the vessel is equal to that of the same vessel with the entire 
plant under fully attended direct manual supervision.
    (b) Coast Guard acceptance of automated systems to replace specific 
personnel or to reduce overall crew requirements is predicated upon--

[[Page 299]]

    (1) The capabilities of the automated systems;
    (2) The combination of the personnel, equipment, and systems 
necessary to ensure the safety of the vessel, personnel, and environment 
in all sailing conditions, including maneuvering;
    (3) The ability of the crew to perform all operational evolutions, 
including emergencies such as fire or control or monitoring system 
failure;
    (4) A planned maintenance program including routine maintenance, 
inspection, and testing to ensure the continued safe operation of the 
vessel; and
    (5) The automated system's demonstrated reliability during an 
initial trial period, and its continuing reliability.

    Note: The cognizant Officer in Charge, Marine Inspection, (OCMI) 
also determines the need for more or less equipment depending on the 
vessel characteristics, route, or trade.

    (c) Equipment provided to replace specific personnel or to reduce 
overall crew requirements that proves unsafe or unreliable in the 
judgment of the cognizant Officer in Charge, Marine Inspection, must be 
immediately replaced or repaired or vessel manning will be modified to 
compensate for the equipment inadequacy.



Sec. 62.50-20  Additional requirements for minimally attended machinery plants.

    Note: Minimally attended machinery plants include vessel machinery 
plants and spaces that are automated, but not to a degree where the 
plant could be left unattended. Emphasis is placed on the centralized 
remote control and monitoring of the machinery plant and machinery 
spaces.

    (a) General. (1) Navigating bridge propulsion control must be 
provided.
    (2) An ECC must be provided and must include the automatic and 
remote control and monitoring systems necessary to limit the operator's 
activity to monitoring the plant, initiating programed control system 
sequences, and taking appropriate action in an emergency.
    (3) The ECC must include control and monitoring of all vital 
engineering systems, including--
    (i) The propulsion plant and its auxiliaries;
    (ii) Electrical power generation and distribution;
    (iii) Machinery space fire detection, alarm, and extinguishing 
systems; and
    (iv) Machinery space flooding safety systems, except the valves 
described in paragraph (e)(4) of this section.
    (4) ECC control of vital systems must include the ability to place 
required standby systems, auxiliaries, and power sources in operation, 
unless automatic transfer is provided, and to shut down such equipment 
when necessary.

    Note: ECC remote control need not include means for a single 
operator to bring the plant to standby from a cold plant or dead ship 
condition or controls for non-vital systems or equipment.

    (b) Alarms and instrumentation. (1) A personnel alarm must be 
provided and must annunciate on the bridge if not routinely acknowledged 
at the ECC or in the machinery spaces.
    (2) Continuous or demand instrumentation displays must be provided 
at the ECC to meet the system and equipment monitoring requirements of 
this part if the ECC is to be continuously attended. If the 
watchstander's normal activities include maintenance, a roving watch, or 
similar activities in the machinery spaces but not at the ECC, both 
alarms and instrumentation must be provided.
    (3) All required audible alarms must annunciate throughout the ECC 
and machinery spaces.
    (c) Fire detection and alarms. An approved automatic fire detection 
and alarm system must be provided to monitor all machinery spaces. The 
system must activate all alarms at the ECC, the navigating bridge, and 
throughout the machinery spaces and engineers' accommodations. The ECC 
and bridge alarms must visually indicate which machinery space is on 
fire, as applicable.

    Note: For purposes of this part, the specific location of fires that 
are not in machinery spaces need not be indicated.

    (d) Fire pumps. (1) The ECC must include control of the main 
machinery space fire pumps.
    (2) Remote control of a required fire pump must be provided from the 
navigating bridge. Where one or more fire

[[Page 300]]

pumps is required to be independent of the main machinery space, at 
least one such pump must be controlled from the navigating bridge.
    (e) Flooding safety. (1) Machinery space bilges, bilge wells, shaft 
alley bilges, and other minimally attended locations where liquids might 
accumulate must be monitored from the ECC to detect flooding angles from 
vertical of up to 15 deg. heel and 5 deg. trim.
    (2) The ECC must include the controls necessary to bring at least 
one independent bilge pump and independent bilge suction required by 
Sec. 56.50-50(e) of this chapter into operation to counter flooding.
    (3) Where watertight doors in subdivision bulkheads are required in 
the machinery spaces, they must be Class 3 watertight doors and must be 
controllable from the ECC and the required navigating bridge control 
location.
    (4) Controls must be provided to operate the sea inlet and discharge 
valves required by Sec. 56.50-95(d) of this chapter and the emergency 
bilge suction required by Sec. 56.50-50(f). These controls must be 
arranged to allow time for operation in the event of flooding with the 
vessel in the fully loaded condition. Time considerations must include 
detection, crew response, and control operation time.
    (f) Communications. (1) A means must be provided at the ECC to 
selectively summon any engineering department member from the 
engineering accommodations to the ECC.
    (2) The voice communications system required by Sec. 113.30-5(a) of 
this chapter must also include the engineering officers' accommodations.
    (g) Electrical systems. (1) The ECC must include the controls and 
instrumentation necessary to place the ship service and propulsion 
generators in service in 30 seconds.
    (2) The main distribution and propulsion switchboards and generator 
controls must either be located at the ECC, if the ECC is within the 
bounaries of the main machinery space, or the controls and 
instrumentation required by part 111 of this chapter must be duplicated 
at the ECC. Controls at the switchboard must be able to override those 
at the ECC, if separate. Also see Sec. 111.12-11(g) and Sec. 111.30-
1(a)(4) regarding switchboard location.
    (h) Maintenance program. (1) The vessel must have a planned 
maintenance program to ensure continued safe operation of all vital 
systems. Program content and detail is optional, but must include 
maintenance and repair manuals for work to be accomplished by 
maintenance personnel and checkoff lists for routine inspection and 
maintenance procedures.
    (2) The planned maintenance program must be functioning prior to the 
completion of the evaluation period for reduced manning required by 
Sec. 62.50-1(b)(5).
    (3) Maintenance and repair manuals must include details as to what, 
when, and how to troubleshoot, repair and test the installed equipment 
and what parts are necessary to accomplish the procedures. Schematic and 
logic diagrams required by Sec. 62.20-1 of this part must be included in 
this documentation. Manuals must clearly delineate information that is 
not applicable to the installed equipment.

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988; 53 FR 
24270, June 28, 1988]



Sec. 62.50-30  Additional requirements for periodically unattended machinery plants.

    Note: Periodically unattended machinery plants include machinery 
plants and spaces that are automated to the degree that they are self-
regulating and self-monitoring and could safely be left periodically 
unattended. Emphasis is placed on providing systems that act 
automatically until the crew can take action in the event of a failure 
or emergency. Requirements are in addition to those of a minimally 
attended machinery plant.

    (a) General. The requirements of this section must be met in 
addition to those of Sec. 62.50-20 of this part.
    (b) Automatic transfer. Redundant vital auxiliaries and power 
sources must automatically transfer to the backup units upon failure of 
operating units.
    (c) Fuel systems. The fuel service and treatment system(s) must meet 
section 41.77.1 of the American Bureau of Shipping's ``Rules for 
Building and Classing Steel Vessels.''

[[Page 301]]

    (d) Starting systems. Automatic or remote starting system receivers, 
accumulators, and batteries must be automatically and continuously 
charged.
    (e) Assistance-needed alarm. The engineer's assistance-needed alarm 
(see subpart 113.27 of this chapter) must annunciate if--
    (1) An alarm at the ECC is not acknowledged in the period of time 
necessary for an engineer to respond at the ECC from the machinery 
spaces or engineers' accommodations; or
    (2) An ECC alarm system normal power supply fails.
    (f) Remote alarms. ECC alarms for vital systems that require the 
immediate attention of the bridge watch officer for the safe navigation 
of the vessel must be extended to the bridge. All ECC alarms required by 
this part must be extended to the engineers' accommodations. Other than 
fire or flooding alarms, this may be accomplished by summarized visual 
alarm displays.
    (g) ECC alarms. All requirements of this part for system or 
equipment monitoring must be met by providing both displays and alarms 
at the ECC.
    (h) Fire control station. A control station for fire protection of 
the machinery spaces must be provided outside the machinery spaces. At 
least one access to this station must be independent of category A 
machinery spaces, and any boundary shared with these spaces must have an 
A-60 fire classification as defined in Sec. 72.05 of this chapter. 
Except where such an arrangement is not possible, control and monitoring 
cables and piping for the station must not adjoin or penetrate the 
boundaries of a category A machinery space, uptakes, or casings. The 
fire control station must include--
    (1) Annunciation of which machinery space is on fire;
    (2) Control of a fire pump required by this chapter to be 
independent of the main machinery spaces;
    (3) Controls for machinery space fixed gas fire extinguishing 
systems;
    (4) Control of oil piping positive shutoff valves located in the 
machinery spaces and required by Sec. 56.50-60(d);
    (5) Controls for machinery space fire door holding and release 
systems, skylights and similar openings;
    (6) The remote stopping systems for the machinery listed in 
Sec. 111.103 of this chapter; and
    (7) Voice communications with the bridge.
    (i) Oil leakage. Leakages from high pressure fuel oil pipes must be 
collected and high levels must be alarmed at the ECC.
    (j) Maintenance program. The maintenance program of Sec. 62.50-20(h) 
must include a checkoff list to make sure that routine daily maintenance 
has been performed, fire and flooding hazards have been minimized, and 
plant status is suitable for unattended operation. Completion of this 
checkoff list must be logged before leaving the plant unattended.
    (k) Continuity of electrical power. The electrical plant must meet 
sections 41.75.1 and 41.75.3 of the American Bureau of Shipping's 
``Rules for Building and Classing Steel Vessels'' and must--
    (1) Not use the emergency generator for this purpose;
    (2) Restore power in not more than 30 seconds; and
    (3) Account for loads permitted by Sec. 111.70-3(f) of this chapter 
to automatically restart.

[CGD 81-030, 53 FR 17838, May 18, 1988; 53 FR 19090, May 26, 1988]



PART 63--AUTOMATIC AUXILIARY BOILERS--Table of Contents




                    Subpart 63.01--General Provisions

Sec.
63.01-1  Purpose.
63.01-3  Scope and applicability.

                 Subpart 63.05--Reference Specifications

63.05-1  Incorporation by reference.

                 Subpart 63.10--Miscellaneous Submittals

63.10-1  Test procedures and certification report.

                   Subpart 63.15--General Requirements

63.15-1  General.
63.15-3  Fuel system.
63.15-5  Strainers.
63.15-7  Alarms.
63.15-9  Inspections and tests.

[[Page 302]]

          Subpart 63.20--Additional Control System Requirements

63.20-1  Specific control system requirements.

 Subpart 63.25--Requirements for Specific Types of Automatic Auxiliary 
                                 Boilers

63.25-1  Small automatic auxiliary boilers.
63.25-3  Electric hot water supply boilers.
63.25-5  Fired thermal fluid heaters.
63.25-7  Exhaust gas boilers.
63.25-9  Incinerators.

    Authority: 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 
1980 Comp., p. 277; 49 CFR 1.46.

Source: CGD 88-057, 55 FR 24238, June 15, 1990, unless otherwise noted.



                    Subpart 63.01--General Provisions



Sec. 63.01-1  Purpose.

    This part specifies the minimum requirements for safety for each 
automatic auxiliary boiler, including its design, construction, testing, 
and operation.



Sec. 63.01-3  Scope and applicability.

    (a) This part contains the requirements for automatic auxiliary 
boilers, including their controls, control system components, electrical 
devices, safety devices, and accessories. Types of automatic auxiliary 
boilers which are covered include large and small automatic auxiliary 
boilers, automatic heating boilers, automatic waste heat boilers, donkey 
boilers, miniature boilers, electric boilers, fired thermal fluid 
heaters, automatic incinerators, and electric hot water supply boilers. 
Automatic auxiliary boilers are classified by their service, control 
systems, pressure and temperature boundaries, heat input ratings, and 
firing mediums as follows:
    (1) Automatic auxiliary boilers listed in Table 54.01-5(A) of this 
chapter which reference this part for regulation of their automatic 
controls.
    (2) Automatic control systems for automatic auxiliary boilers having 
a heat input rating of less than 12,500,000 Btu/hr. (3.66 megawatts)(20 
gph).
    (3) Electric hot water supply boilers (heaters) containing electric 
heating elements rated at 600 volts or less.
    (4) Exhaust gas boilers, and their controls and accessories used to 
heat water and/or generate steam.
    (5) Incinerators (and their control systems) used for the generation 
of steam and/or oxidation of ordinary waste materials and garbage. This 
part also includes incinerators which serve as automatic auxiliary 
boilers.
    (6) Fired thermal fluid heaters and their controls.
    (b) Exceptions. Automatic boilers having heat input ratings of 
12,500,000 Btu/hr. (3.66 megawatts) (20 gph) and above must meet the 
requirements of part 52 of this chapter. Their control systems must meet 
the requirements of part 62 of this chapter. Electric cooking equipment 
must comply with Sec. 111.77-3 of this chapter. Electric oil immersion 
heaters must comply with part 111, subpart 111.85 of this chapter. 
Electric air heating equipment must comply with part 111, subpart 111.87 
of this chapter.



                 Subpart 63.05--Reference Specifications



Sec. 63.05-1  Incorporation by reference.

    (a) Certain materials are incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than the one listed 
in paragraph (b) of this section, notice of change must be published in 
the Federal Register and the material made available to the public. All 
approved material is on file at the Office of the Federal Register, 800 
North Capitol Street, NW., suite 700, Washington, DC and at the U.S. 
Coast Guard, Office of Design and Engineering Standards (G-MSE), 2100 
Second Street SW., Washington, DC 20593-0001, and is available from the 
sources listed in paragraph (b) of this section.
    (b) The material approved for incorportation by reference in this 
part and the sections affected are:

[[Page 303]]



American Society of Mechanical Engineers                                
  345 East 47th Street, New York, NY 10017                              
    ANSI/ASME CSD-1-1982 with Addenda CSD-la-1984, Controls             
     and Safety Devices for Automatically Fired Boilers,                
     November 15, 1984........................................  63.10-1;
                                                                63.15-1;
                                                                   63.20
Underwriters' Laboratories, Inc. (UL)                                   
  333 Pfingsten Road, Northbrook, Illinois 60062                        
    ANSI/UL-174, Standard for Household Electric Storage Tank           
     Water Heaters, Seventh Edition, April 18, 1983 (Revisions          
     through March 1988)......................................   63.25-3
    ANSI/UL-296, Standard for Oil Burners, Seventh Edition,             
     August 22, 1980 (Revisions through August 1985)..........   63.15-5
    ANSI/UL-343, Standard for Pumps for Oil Burning                     
     Appliances, Sixth Edition, July 17, 1986.................   63.15-5
    ANSI/UL-1453, Standard for Electric Booster and Commercial          
     Storage Tank Water Heaters, Third Edition, February 5,             
     1988.....................................................   63.25-3
American Gas Association                                                
  1515 Wilson Boulevard, Arlington, Virginia 22209                      
    ANSI/AGA Z21.22-86 Relief Valves and Automatic Shutoff              
     Devices for Hot Water Supply Systems, March 28, 1986.....   63.25-3
                                                                        


[CGD 88-057, 55 FR 24238, June 15, 1990, as amended by CGD 95-072, 60 FR 
50463, Sept. 29, 1995; CGD 96-041, 61 FR 50728, Sept. 27, 1996]



                 Subpart 63.10--Miscellaneous Submittals



Sec. 63.10-1  Test procedures and certification report.

    Two (2) copies of the following items must be submitted to the 
Commanding Officer, U.S. Coast Guard Marine Safety Center, 400 Seventh 
Street SW., Washington, DC 20590-0001.
    (a) Detailed instructions for operationally testing each automatic 
auxiliary boiler, its controls, and safety devices.
    (b) A certification report for each automatic auxiliary boiler 
which:
    (1) Meets paragraph CG-510 of ANSI/ASME CSD-1a; and
    (2) Certifies that each automatic auxiliary boiler, its controls, 
and safety devices comply with the additional requirements of this part.



                   Subpart 63.15--General Requirements



Sec. 63.15-1  General.

    (a) Each automatic auxiliary boiler must be designed and constructed 
for its intended service according to the requirements of the parts 
referenced in Sec. 54.01-5, Table 54.01-5(A) of this chapter.
    (b) Controls and safety devices for automatic auxiliary boilers must 
meet the applicable requirements of ANSI/ASME CSD-1/CSD-1a, except 
Paragraph CG-310.
    (c) All devices and components of an automatic auxiliary boiler must 
satisfactorily operate within the marine environment. The boiler must 
satisfactorily operate with a momentary roll of 30 deg., a list of 
15 deg., and a permanent trim of 5 deg. with it installed in a position 
as specified by the manufacturer.
    (d) An electrical control used to shut down the automatic auxiliary 
boiler must be installed in accordance with Sec. 58.01-25 of this 
chapter. This device must stop the fuel supply to the fuel burning 
equipment.
    (e) Mercury tube actuated controls are prohibited from being 
installed and used on automatic auxiliary boilers.



Sec. 63.15-3  Fuel system.

    (a) Firing of an automatic auxiliary boiler by natural gas is 
prohibited unless specifically approved by the Marine Safety Center.
    (b) Heated heavy fuel oil may be used provided the heaters are 
equipped with a high temperature limiting device that shuts off the 
heating source at a temperature below the flashpoint of the oil and is 
manually reset. When a thermostatically-controlled electric oil heater 
and a level device is used, it must meet the requirements of part 111, 
subpart 111.85 of this chapter.

    Note: An auxiliary boiler may be safely ignited from the cold 
condition using unheated diesel or light fuel oil and subsequently 
shifted to heated heavy fuel.


[[Page 304]]


    (c) The fuel oil service pump and its piping system must be designed 
in accordance with Sec. 56.50-65 of this chapter. All materials must 
meet the requirements of part 56, subpart 56.60 of this chapter. The use 
of cast iron or malleable iron is prohibited.
    (d) The fuel oil service system (including the pump) must meet the 
pressure classification and design criteria found in Sec. 56.04-2, Table 
56.04-2 of this chapter.
    (e) When properly selected for the intended service, fuel pumps 
meeting the performance and test requirements of ANSI/UL 343 meet the 
requirements of this section.



Sec. 63.15-5  Strainers.

    (a) Strainers must be installed in the fuel supply line. Each 
strainer must be self-cleaning, fitted with a bypass, or be capable of 
being cleaned without interrupting the fuel oil supply.
    (b) The strainer must not allow a quantity of air to be trapped 
inside which would affect the rate of fuel flow to the burner or reduce 
the effective area of the straining element.
    (c) The strainer must meet the requirements for strainers found in 
ANSI/UL 296 and the requirements for fluid conditioner fittings found in 
Sec. 56.15-5 of this chapter.



Sec. 63.15-7  Alarms.

    (a) An audible alarm must automatically sound when a flame safety 
system shutdown occurs. A visible indicator must indicate that the 
shutdown was caused by the flame safety system.
    (b) Means must be provided to silence the audible alarm. The visible 
indicators must require manual reset.
    (c) For steam boilers, operation of the lower low water cutoff must 
automatically sound an audible alarm. A visual indicator must indicate 
that the shutdown was caused by low water.
    (d) For a periodically unattended machinery space, the auxiliary 
boiler trip alarm required by 46 CFR 62.35-50, Table 62.35-50 satisfies 
the requirements for the audible alarms specified in this section.



Sec. 63.15-9  Inspections and tests.

    All automatic auxiliary boilers must be inspected and tested in 
accordance with the requirements of part 61 of this chapter.



          Subpart 63.20--Additional Control System Requirements



Sec. 63.20-1  Specific control system requirements.

    In addition to the requirements found in ANSI/ASME CSD-1/CSD-1a, the 
following requirements apply for specific control systems:
    (a) Primary safety control system. Following emergency safety trip 
control operation, the air flow to the boiler must not automatically 
increase. For this condition, postpurge must be accomplished manually.
    (b) Combustion control system. A low fire interlock must ensure low 
fire start when variable firing rates are used.
    (c) Water level controls and low water cutoff controls. Water level 
controls must be constructed and located to minimize the effects of 
vessel roll and pitch. Float chamber low water cutoff controls using 
stuffing boxes to transmit the motion of the float from the chamber to 
the external switches are prohibited. No outlet connection other than 
pressure controls, water columns, drains, and steam gages may be 
installed on the float chamber or on the pipes connecting the float 
chamber to the boiler. The water inlet valve must not feed water into 
the boiler through the float chamber. The boiler feed piping must comply 
with the applicable requirements of Sec. 56.50-30 of this chapter.



 Subpart 63.25--Requirements for Specific Types of Automatic Auxiliary 
                                 Boilers



Sec. 63.25-1  Small automatic auxiliary boilers.

    Small automatic auxiliary boilers, defined as having a heat input 
rating of 400,000 Btu/hr. and less (117 kilowatts and less) (3 gph and 
less), must meet the following additional requirements.
    (a) Small automatic auxiliary boilers must be equipped with a visual 
indicator which indicates when the low water cutoff has activated.

[[Page 305]]

    (b) A prepurge period of a sufficient duration to ensure at least 
four changes of air in the combustion chamber and stack, but not less 
than 15 seconds must be provided. Ignition must occur only before or 
simultaneously with the opening of the fuel oil valve.



Sec. 63.25-3  Electric hot water supply boilers.

    (a) Electric hot water supply boilers which have a capacity not 
greater than 454 liters (120 U.S. gallons), a heat input rate not 
greater than 200,000 Btu/hr. (58.6 kilowatts), meet the requirements of 
ANSI/UL 174 or ANSI/UL 1453, and are protected by the relief device(s) 
required in Sec. 53.05-2 of this chapter do not have to meet any other 
requirements of this section except the periodic testing required by 
paragraph (j) of this section. Electric hot water supply boilers which 
meet the requirements of UL 174 may have temperature-pressure relief 
valves that meet the requirements of ANSI/AGA Z21.22 in lieu of subpart 
53.05 of this chapter.
    (b) Each hot water supply boiler must be constructed in accordance 
with the applicable requirements of part 52 or part 53 of this chapter.
    (c) Branch circuit conductors for hot water supply boilers which 
have a capacity not greater than 454 liters (120 U.S. gallons) must have 
a current carrying capacity of not less than 125 percent of the current 
rating of the appliance. Branch circuit conductors for hot water supply 
boilers with capacities of more than 454 liters (120 U.S. gallons) must 
have a current carrying capacity of not less than 100 percent of the 
current rating of the appliance. Wiring materials and methods must 
comply with part 111, subpart 111.60 of this chapter. A hot water supply 
boiler having a current rating of more than 48 amperes and employing 
resistance type heating elements must have the heating elements on 
subdivided circuits. Each subdivided load, except for an electric hot 
water supply boiler employing a resistance type immersion electric 
heating element, must not exceed 48 amperes, and it must be protected at 
not more than 60 amperes. An electric hot water supply boiler employing 
a resistance type immersion electric heating element may be subdivided 
into circuits not exceeding 120 amperes and protected at not more than 
150 amperes. Overcurrent protection devices must comply with part 111, 
subpart 111.50 of this chapter.
    (d) Heating elements must be insulated electrically from the water 
being heated, guarded against mechanical injury and contact with outside 
objects, and securely supported. Consideration must be given to sagging, 
opening, and other adverse conditions of the elements resulting from 
continuous heating, and flexion of supports and wiring due to alternate 
heating and cooling. Wrap-around elements must be secured in a manner 
which prevents loosening.
    (e) Iron and steel parts must be protected against corrosion by 
enameling, galvanizing, or plating. Iron and steel storage tanks having 
a wall thickness less than 6.4mm (\1/4\-inch) must have the inside 
surface protected against corrosion.
    (f) Each heating element must have a temperature regulating device. 
The device must limit the water from obtaining a temperature greater 
than 90  deg.C. (194 deg.F.). If the control has a marked off position, 
the control must disconnect the heating element from all ungrounded 
conductors, and it must not respond to temperature when placed in the 
off position.
    (g) An independent temperature limiting device must prevent the 
water in the upper 25 percent of the tank from attaining a temperature 
higher than 99  deg.C. (210  deg.F.). This device must require manual 
resetting, be trip free from the operating means, open all ungrounded 
power supply conductors to the heater, and be readily accessible.
    (h) Electric hot water supply boilers must have pressure and 
temperature relieving valves. The valve temperature setting must not be 
more than 99  deg.C. (210 deg. F.). The pressure relief setting must not 
be higher than the marked working pressure of the boiler. The pressure 
and temperature relief valves must meet part 53, subpart 53.05 of this 
chapter. The pressure and temperature relief valves may be combined into 
a pressure-temperature relief valve.
    (i) Electric hot water supply boilers must be marked in a visible 
location with the manufacturer's name, model or other identification 
number, water

[[Page 306]]

capacity, and the electrical ratings of each heating element. When two 
or more heating elements are installed, the maximum wattage or current 
consumption must be indicated. The cold water inlet and the hot water 
outlet must each be clearly distinguished or marked for identification 
purposes.
    (j) All electric hot water supply boilers must have their pressure 
relief devices tested as required by part 52 or part 53 of this chapter, 
as applicable. Electric hot water supply boilers which meet the 
requirements of ANSI/UL 174 or ANSI/UL 1453 and have heating elements, 
temperature regulating controls, and temperature limiting controls are 
satisfactory for installation and service without further installation 
testing. All electric hot water supply boilers not meeting the 
requirements of ANSI/UL 174 or ANSI/UL 1453 must have their heating 
elements, temperature regulating controls, and temperature limiting 
controls tested by the marine inspector at the time of installation. All 
electric hot water supply boilers must have their heating elements, 
temperature regulating controls, and temperature limiting controls 
tested by the marine inspector at each inspection for certification and 
more often if necessary, to determine that the heating elements and 
controls are in a safe and satisfactory operating condition.



Sec. 63.25-5   Fired thermal fluid heaters.

    (a) Construction. Fired thermal fluid heaters must meet the 
requirements of part 52 of this chapter, as applicable.
    (b) Controls. Fired thermal fluid heaters must have a low fluid 
level cutout device or a low flow device. When the rate of fluid flow 
through the heating coils is insufficient to ensure proper heat 
transfer, the device must cut off the fuel supply to the burner. If the 
fluid temperature exceeds the designed maximum operating temperature, a 
high temperature limit device must cut off the fuel supply to the 
burner. These devices must be of the manual reset type.



Sec. 63.25-7   Exhaust gas boilers.

    (a) Construction. An auxiliary exhaust gas boiler must meet the 
applicable construction requirements of part 52 or part 53 of this 
chapter as determined from Sec. 54.01-5, Table 54.01-5(A) of this 
chapter.
    (b) Controls. Each drum type exhaust gas steam boiler must have a 
feed water control system. The system must automatically supply the 
required amount of feed water and maintain it at the proper level. For 
boilers without a fixed water level, the control system must supply the 
feed water at a rate sufficient to ensure proper heat transfer. The 
system must adequately fill the boiler when cold.
    (c) Alarms. When a condition arises which results in inadequate heat 
transfer, a high temperature alarm or low flow alarm must be activated. 
An audible alarm must automatically sound, and a visual indicator must 
indicate when the fluid temperature exceeds the maximum operating 
temperature or when the fluid/steam flowing through the heat exchanger 
is insufficient to ensure proper heat transfer. Additionally, an audible 
alarm must automatically sound, and a visual indicator must indicate 
when a soot fire is present in the exhaust gas boiler's uptake.



Sec. 63.25-9   Incinerators.

    (a) Construction. Incinerators which produce hot water or generate 
steam must meet the requirements of part 52 or part 53 of this chapter, 
as applicable.
    (b) A high temperature limit device must be installed in the 
combustion chamber and flue gas duct of the incinerator. Each limit 
device must be of the manual reset type and cause an automatic shutdown 
of the incinerator when a temperature higher than the maximum operating 
temperature is detected.



PART 64--MARINE PORTABLE TANKS AND CARGO HANDLING SYSTEMS--Table of Contents




                           Subpart A--General

Sec.
64.1  Purpose.
64.2  Incorporation by reference.
64.3  Applicability.
64.5  Definitions.
64.9  Maintenance, repair, and alteration of MPTs.

[[Page 307]]

                     Subpart B--Standards for an MPT

64.11  Design of MPTs.
64.13  Allowable stress; tank.
64.15  Allowable stress; framework.
64.17  Minimum tank thickness.
64.19  External pressure.
64.21  Material.
64.23  Gasket and lining.
64.25  Cross section.
64.27  Base.
64.29  Tank saddles.
64.31  Inspection opening.
64.33  Pipe connection.
64.35  Bottom filling or discharge connection.
64.37  Valve and fitting guard.
64.39  Valve securing device.
64.41  Stop valve closure.
64.43  Lifting fittings.
64.45  Securing devices.
64.47  Type of relief devices.
64.49  Labeling openings.
64.51  Tank parts marking.
64.53  Information plate for MPTs.
64.55  Relief device location.

  Subpart C--Pressure Relief Devices and Vacuum Relief Devices for MPTs

64.57  Acceptance of pressure relief devices.
64.59  Spring loaded pressure relief valve.
64.61  Rupture disc.
64.63  Minimum emergency venting capacity.
64.65  Vacuum relief device.
64.67  Shutoff valve.
64.69  Location of the pressure relief device.
64.71  Marking of pressure relief devices.

                          Subpart D--[Reserved]

            Subpart E--Periodic Inspections and Tests of MPTs

64.77  Inspection and test.
64.79  Inspection of pressure and vacuum relief device.
64.81  30-month inspection of an MPT.
64.83  Hydrostatic test.

                    Subpart F--Cargo Handling System

64.87  Purpose.
64.88  Plan approval, construction, and inspection of cargo-handling 
          systems.
64.89  Cargo pump unit.
64.91  Relief valve for the cargo pump discharge.
64.93  Pump controls.
64.95  Piping.
64.97  Cargo hose.

    Authority: 46 U.S.C. 3306, 3703; 49 U.S.C. App. 1804; 49 CFR 1.46.

    Source: CGD 73-172, 39 FR 22950, June 25, 1974, unless otherwise 
noted.



                           Subpart A--General



Sec. 64.1  Purpose.

    This part contains the requirements for--
    (a) Design, construction, repair, alteration, and marking of marine 
portable tanks (MPTs) authorized by this chapter to be carried on 
inspected vessels;
    (b) Periodic inspections and tests of MPTs; and
    (c) Design and construction of cargo-handling systems for MPTs and 
other portable tanks authorized under subparts 98.30 and 98.33 of this 
chapter.

[CGD 84-043, 55 FR 37409, Sept. 11, 1990; 55 FR 47477, Nov. 14, 1990]



Sec. 64.2  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register in accordance 
with 5 U.S.C. 552(a). To enforce any edition other than the one listed 
in paragraph (b) of this section, the Coast Guard must publish notice of 
the change in the Federal Register and make the material available to 
the public. All approved material is on file at the Office of the 
Federal Register, 800 North Capitol Street, NW., suite 700, Washington, 
DC; and at the U.S. Coast Guard, Marine Safety and Environmental 
Protection, 2100 Second Street SW., Washington, DC, and is available 
from the source indicated in paragraph (b) of this section.
    (b) The material approved for incorporation by reference in this 
part, and the sections affected, are:

                American Society of Mechanical Engineers

    United Engineering Center, 1345 East 47th Street, New York, NY 
10017.

ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, Pressure 
Vessels, 1989, with Addenda issued December 31, 1989 (``ASME Code'') 
                           64.5, 64.7, 64.11, 64.13, 64.21, 64.25, 64.31

[CGD 84-043, 55 FR 37409, Sept. 11, 1990; 55 FR 47477, Nov. 14, 1990, as 
amended by CGD 96-041, 61 FR 50728, Sept. 27, 1996]

[[Page 308]]



Sec. 64.3  Applicability.

    (a) This part applies to each MPT for which the Commanding Officer, 
U.S. Coast Guard Marine Safety Center, receives an application for 
approval on or before May 1, 1991.
    (b) Subpart F of this part also applies to portable tanks and to 
cargo-handling systems for portable tanks authorized under subparts 
98.30 and 98.33 of this chapter.

[CGD 84-043, 55 FR 37409, Sept. 11, 1990]



Sec. 64.5  Definitions.

    As used in this part:
    (a) Marine portable tank or MPT means a liquid-carrying tank that--
    (1) Has a capacity of 110 gallons or more;
    (2) Is designed to be carried on a vessel;
    (3) Can be lifted full or empty onto and off a vessel, and can be 
filled and discharged while on a vessel;
    (4) Is not permanently attached to the vessel; and
    (5) Was inspected and stamped by the Coast Guard on or before 
September 30, 1992.
    (b) Tank means the pressure vessel and the associated fittings of an 
MPT that come in contact with the product being carried.
    (c) Total containment pressure means the minimum pressure for total 
product containment under normal operating conditions at a gauge 
pressure consisting of the absolute vapor pressure of the product at 
122 deg. F added to the dynamic pressure, based on the tank dimensions 
and the location of the relief devices, of not less than 5 pounds per 
square inch gauge (psig) at the top of the tank in the operating 
position.
    (d) Maximum allowable working pressure means the maximum gauge 
pressure at the top of the tank in the operating position at 122 deg. F, 
equal to or greater than the total containment pressure as defined in 
paragraph (c) of this section. The maximum allowable working pressure is 
used in the calculation of the minimum thickness of each element of the 
tank, excluding the allowance for corrosion and the thickness for 
loadings other than pressure, as provided for in the ASME Code.
    (e) Test pressure means a hydrostatic pressure of at least one and 
one-half times the maximum allowable working pressure.
    (f) Dynamic loading conditions means the following:
    (1) A loading in the vertical down direction equal to 2 times the 
weight of the tank and the heaviest product carried.
    (2) A loading in the transverse direction equal to the weight of the 
tank and the heaviest product carried.
    (3) A loading in the longitudinal direction equal to the weight of 
the tank and the heaviest product carried.
    (g) Owner means the person, corporation, company, partnership, or 
organization in which is vested the ownership, dominion, or title of a 
portable tank.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37409, Sept. 11, 1990]



Sec. 64.9  Maintenance, repair, and alteration of MPTs.

    (a) Each MPT must be maintained in accordance with the approved 
plans, this part, and subpart 98.30 of this chapter.
    (b) Repair of an MPT is authorized, provided that each repair is in 
accordance with the approved plans.
    (c) No MPT may be altered, except with the written approval of the 
Commanding Officer, U.S. Coast Guard Marine Safety Center.
    (d) After each welded repair or alteration, an MPT must be 
hydrostatically pressure-tested in accordance with paragraph (a) of 
Sec. 64.83 of this part.

[CGD 84-043, 55 FR 37409, Sept. 11, 1990]



                     Subpart B--Standards for an MPT



Sec. 64.11  Design of MPTs.

    An MPT must be designed--
    (a) In accordance with the ASME Code and this subpart;
    (b) With a maximum gross weight of 55,000 pounds;
    (c) To hold a liquid cargo that has a vapor pressure of 43 pounds 
per square inch absolute (psia) or less at a temperature of 122  deg.F;
    (d) With a minimum service temperature of 0  deg.F or higher;

[[Page 309]]

    (e) With a maximum allowable working pressure of not less than 20 
pounds per square inch gauge (psig) but not more than 48 psig; and
    (f) To withstand dynamic loading conditions applied simultaneously.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990; 55 FR 40755, Oct. 4, 1990]



Sec. 64.13   Allowable stress; tank.

    (a) The calculated stress in the tank under design conditions, 
including dynamic loading conditions applied simultaneously, must not 
exceed the allowable stress listed in Division 1 of section VIII of the 
ASME Code, for a design temperature of 122 deg. F.
    (b) The calculated stress in the tank at test pressure must not 
exceed 75 percent of the minimum yield stress,1 or 37.5 percent of 
the minimum tensile stress1 of the material, whichever is less.
---------------------------------------------------------------------------

    1Listed in Division 1 of section VIII of the ASME Code.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990]



Sec. 64.15   Allowable stress; framework.

    The calculated stress for the framework must be 80 percent or less 
of the minimum yield stress of the framework material under the dynamic 
loading conditions that are applied simultaneously.



Sec. 64.17   Minimum tank thickness.

    (a) Except as allowed in paragraph (b) of this section, a tank with 
a diameter of--
    (1) 6 feet or less must have a shell and head of \3/16\ inch 
thickness or more; or
    (2) More than 6 feet must have a shell and head of \1/4\ inch 
thickness or more.
    (b) If the tank has additional framework to guard against accidental 
puncturing of the tank, the shell and head thickness must be \1/8\ inch 
or more.



Sec. 64.19   External pressure.

    (a) A tank without a vacuum breaker must be designed to withstand an 
external pressure of 7\1/2\ psig or more.
    (b) A tank with a vacuum breaker must be designed to withstand an 
external pressure of 3 psig or more.



Sec. 64.21   Material.

    The material for a tank must meet the requirements in Division 1 of 
section VIII of the ASME Code.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990]



Sec. 64.23   Gasket and lining.

    Each gasket and lining must be made of material that is--
    (a) Chemically compatible with the product for which the tank is 
approved; and
    (b) Resistant to deterioration from the product for which the tank 
is approved.



Sec. 64.25   Cross section.

    A tank must have a cross section design that is--
    (a) Circular; or
    (b) Other than circular and stress analyzed experimentally by the 
method contained in UG-101 of the ASME Code.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990]



Sec. 64.27   Base.

    The base of an MPT must be as wide and as long as the tank.



Sec. 64.29   Tank saddles.

    If a tank is not completely supported by a framework, it must be 
supported by two or more external saddles, each of which extends to 120 
degrees or more of the shell circumference.



Sec. 64.31   Inspection opening.

    An MPT must have an inspection opening that is designed in 
accordance with Division 1 of section VIII of the ASME Code.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990]



Sec. 64.33   Pipe connection.

    Each pipe connection that is not a pressure relief device must be 
fitted with a manually operated stop valve or

[[Page 310]]

closure located as close to the tank as practicable.



Sec. 64.35   Bottom filling or discharge connection.

    If an MPT is designed with a filling or discharge connection in the 
bottom, the connection must be fitted with a bolted blank flange, 
threaded cap, or similar device to protect against leakage of the 
product, and a manually operated valve that is located--
    (a) Inside the tank and operated outside the tank; or
    (b) Outside the tank but as close to it as practicable.



Sec. 64.37   Valve and fitting guard.

    Each valve and fitting must be protected from mechanical damage by--
    (a) The tank;
    (b) A tank saddle;
    (c) The framework; or
    (d) A guard.



Sec. 64.39   Valve securing device.

    Each filling and discharge valve must have a securing device to 
prevent unintentional opening.



Sec. 64.41   Stop valve closure.

    A stop valve that operates by a screwed spindle must close in a 
clockwise direction.



Sec. 64.43   Lifting fittings.

    Each MPT must have attached lifting fittings so that the tank 
remains horizontal and stable while being moved.



Sec. 64.45   Securing devices.

    An MPT or its framework must have sufficient number of positive 
action securing devices, including hooks, lugs, or padeyes, to attach 
the unit to the vessel so that--
    (a) The stress does not exceed the standard contained in Sec. 64.15; 
and
    (b) Additional lashing is not needed.



Sec. 64.47   Type of relief devices.

    (a) An MPT with an internal capacity of more than 550 U.S. gallons 
must have one or more spring loaded relief valves. In addition, a 
rupture disc may be attached.
    (b) An MPT with an internal capacity of 550 U.S. gallons or less 
must have a rupture disc or a spring loaded relief valve.



Sec. 64.49   Labeling openings.

    Each opening of a tank must be labeled to identify the function such 
as ``suction'', ``discharge'', ``heating coil''.



Sec. 64.51   Tank parts marking.

    Any part of a tank furnished by an outside supplier may not be used 
in a tank unless it bears--
    (a) The Coast Guard symbol;
    (b) The Marine Inspection Office identification letters;
    (c) The word ``part'';
    (d) The manufacturer's name and serial number; and
    (e) The design pressure.



Sec. 64.53  Information plate for MPTs.

    (a) A corrosion-resistant metal plate containing the information in 
paragraph (b) of this section must be permanently attached to each MPT.
    (b) Each information plate required in paragraph (a) of this section 
must bear the following information in legible letters 3/16 
inch or more in height:
    (1) Owner's name.
    (2) Manufacturer's name.
    (3) Date of manufacture.
    (4) Serial number of tank.
    (5) Maximum allowable working pressure in psig.
    (6) Test pressure in psig.
    (7) External-pressure rating in psig.
    (8) Total capacity in gallons.
    (9) Maximum net weight in long tons.
    (10) Maximum gross weight in long tons.
    (11) Percent ullage at 122  deg.F.
    (12) Date of hydrostatic test.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]



Sec. 64.55   Relief device location.

    A pressure relief device must be located on an MPT in a place that--
    (a) Is the highest practical point of the tank; and
    (b) Allows direct communication with the vapor space.

[[Page 311]]



  Subpart C--Pressure Relief Devices and Vacuum Relief Devices for MPTs



Sec. 64.57  Acceptance of pressure relief devices.

    A pressure relief device for an MPT must be--
    (a) From a supplier2 accepted under Chapter I of Title 46, Code 
of Federal Regulations; or
---------------------------------------------------------------------------

    2Accepted suppliers are listed in CG-190, Equipment list.
---------------------------------------------------------------------------

    (b) Accepted by the Coast Guard in accordance with the procedures in 
Sec. 50.25-10 of this chapter.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]



Sec. 64.59   Spring loaded pressure relief valve.

    A spring loaded pressure relief valve must--
    (a) Be set at a nominal pressure of 125 percent of the maximum 
allowable working pressure;
    (b) Have a minimum normal venting capacity that is sufficient to 
prevent the tank pressure from exceeding 137.5 percent of the maximum 
allowable working pressure;
    (c) Close after discharge of a pressure not lower than 115 percent 
of the maximum allowable working pressure; and
    (d) If closed, remain closed at any pressure less than 115 percent 
of the maximum allowable working pressure.



Sec. 64.61   Rupture disc.

    If a rupture disc is the only pressure relief device on the tank, 
the rupture disc must--
    (a) Rupture at a pressure of 125 percent of the maximum allowable 
working pressure; and
    (b) Have a minimum normal venting capacity that is sufficient to 
prevent the tank pressure from exceeding 137.5 percent of the maximum 
allowable working pressure.



Sec. 64.63  Minimum emergency venting capacity.

    (a) The total emergency venting capacity (Q) of the relief devices 
of an uninsulated MPT must be in accordance with Table 1 or the 
following formula based upon the pressure relief device operating at a 
pressure not to exceed the test pressure:


                                                                                                                
                                                          A0.82                             ZT                  
                                 Q=633,000    <3-ln (> ---------- <3-ln )>  <3-ln-radic> -------                
                                                           LC                               M                   
                                                                                                                

where:
Q=Minimum required rate of discharge in cubic feet per minute of free 
air at standard conditions (60 deg. F and 14.7 psia).
M=Molecular weight of the product, or 86.7.
T=Temperature, degrees Rankine (460 deg. + temperature in degrees F of 
gas at relieving temperature), or 710 deg. Rankine.
A=Total external surface area of the tank compartment in square feet.
L=Latent heat of the product being vaporized at relieving conditions in 
Btu per pound, or 144 Btu per pound.
Z=Compressibility factor of the gas at relieving conditions, or 1.0.
C=Constant based on relation of specific heats, in accordance with 
Appendix J of Division 1 of Section VIII of the ASME Code, 1974 edition, 
or 315.

    (b) The total emergency venting capacity (Q) of an insulated 
portable tank may have a reduction if--
    (1) It is shown to the Coast Guard that the insulation reduces the 
heat transmission to the tank;
    (2) The present reduction of the emergency venting capacity (Q) is 
limited to the percent reduction of the heat transmission to the tank or 
50 percent, whichever is less; and
    (3) The insulation is sheathed.

  Table 1.--Minimum emergency venting capacity in cubic feet: free air/ 
                   hour (14.7 lb/in\2\a and 60 deg. F)                  
------------------------------------------------------------------------
  Exposed area      Cubic feet free     Exposed area    Cubic feet free 
 square feet\1\      air per hour      square feet\1\     air per hour  
------------------------------------------------------------------------
20..............          27,600              275            237,000    
30..............          38,500              300            256,000    
40..............          48,600              350            289,500    
50..............          58,600              400            322,100    
60..............          67,700              450            355,900    
70..............          77,000              500            391,000    
80..............          85,500              550            417,500    
90..............          94,800              600            450,000    
100.............         104,000              650            479,000    
120.............         121,000              700            512,000    
140.............         136,200              750            540,000    
160.............         152,100              800            569,000    
180.............         168,200              850            597,000    
200.............         184,000              900            621,000    
225.............         199,000              950            656,000    
250.............         219,500            1,000           685,000     
------------------------------------------------------------------------
\1\Interpolate for intermediate sizes.                                  



[[Page 312]]

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990; 55 FR 47477, Nov. 14, 1990]



Sec. 64.65  Vacuum relief device.

    (a) Each MPT that is designed for an external pressure of less than 
7.5 psig must have a vacuum relief device.
    (b) A vacuum relief device for an MPT must--
    (1) Open at an external pressure of not less than 3 psig; and
    (2) Have an opening with a cross-section of 0.44 square inch or 
more.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]



Sec. 64.67   Shutoff valve.

    A shutoff valve may not be located--
    (a) Between the tank opening and pressure relief device; or
    (b) On the discharge side of the pressure relief device.



Sec. 64.69   Location of the pressure relief device.

    A pressure relief device must be--
    (a) Accessible for inspection and repair before stowage of the tank; 
and
    (b) Attached so that escaping gas does not impinge on the tank or 
framework.



Sec. 64.71   Marking of pressure relief devices.

    A pressure relief device must be plainly and permanently marked with 
the--
    (a) Set pressure rating;
    (b) Rated flow capacity expressed as cubic feet of standard air 
(60 deg. F. 14.7 psia) per minute and the pressure at which the flow 
capacity is determined;
    (c) Manufacturer's name and identifying number; and
    (d) Pipe size of inlet.



                          Subpart D--[Reserved]



            Subpart E--Periodic Inspections and Tests of MPTs



Sec. 64.77  Inspection and test.

    For the handling and stowage requirements in Sec. 98.30-3 of this 
chapter, each MPT must pass the following inspections and tests 
conducted by the owner or the owner's representative:
    (a) Pressure relief and vacuum relief devices must be inspected one 
time or more during each 12 month period of service in accordance with 
Sec. 64.79.
    (b) An MPT must be inspected during the 30 months before any month 
in which it is in service in accordance with Sec. 64.81.
    (c) An MPT must pass a hydrostatic test in accordance with 
Sec. 64.83 during the 60 months before any month in which it is in 
service.
    (d) After each welded repair, an MPT must pass a hydrostatic test in 
accordance with Sec. 64.83.

[CGD 73-172, 39 FR 22950, June 25, 1974, as amended by CGD 84-043, 55 FR 
37410, Sept. 11, 1990]



Sec. 64.79   Inspection of pressure and vacuum relief device.

    (a) The inspection of the pressure and vacuum relief device required 
in Sec. 64.77(a) must include--
    (1) Disassembling;
    (2) A visual inspection for defective parts; and
    (3) A test of the accuracy of the pressure setting.
    (b) If the pressure and vacuum relief valve passes the inspection 
required in paragraph (a) of this section, the owner or his 
representative may attach to the device a metal tag containing the date 
of the inspection.



Sec. 64.81   30-month inspection of an MPT.

    (a) The 30-month inspection of an MPT required in Sec. 64.77(b) must 
include--
    (1) An internal and external examination for--
    (i) Corrosion;
    (ii) Cracking of base material; and
    (iii) Weld defects; and
    (2) A visual inspection for defective parts and a manual operation 
of the gauging device, remote operating mechanism, and each valve, 
except the pressure relief device.
    (b) If the tank passes the inspection required in paragraph (a) of 
this section, the owner or his representative may stencil the date of 
the inspection on the MPT near the metal identification plate that is 
required in Sec. 64.53 in durable and legible letters that are 1\1/4\ 
inch in height or larger.

[[Page 313]]



Sec. 64.83   Hydrostatic test.

    (a) The hydrostatic test required in Sec. 64.77(c) includes--
    (1) Closing each manhole and other openings by normal means of 
closure;
    (2) Using wrenches or other tools that are used during normal 
operations to close the manhole and other openings;
    (3) Using the same type of gaskets as used in service;
    (4) If required for the inspection, removing tank insulation;
    (5) Filling the tank with water and pressurizing to the test 
pressure indicated on the metal identification plate without leaking; 
and
    (6) It fitted with an internal heating coil, the heating coil 
passing a hydrostatic test at a pressure of 200 psig or more or 50 
percent or more above the rated pressure of the coil, whichever is 
greater.
    (b) If the tank passes the hydrostatic test required in paragraph 
(a) of this section, the owner or his representative may stamp the date 
of the test and his initials on the metal identification plate required 
in Sec. 64.53.



                    Subpart F--Cargo Handling System



Sec. 64.87  Purpose.

    Each cargo-handling system required to satisfy Sec. 98.30-25 or 
Sec. 98.33-13 of this chapter must meet the requirements of this 
subpart.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]



Sec. 64.88  Plan approval, construction, and inspection of cargo-handling systems.

    Plans for the cargo-handling system of a portable tank authorized 
under subpart 98.30 of this chapter must be approved by the Coast Guard 
in accordance with the requirements of Sec. 56.01-10 of this subchapter. 
In addition, the cargo-handling system must be constructed and inspected 
in accordance with part 56 of this subchapter.

[CGD 84-043, 55 FR 37410, Sept. 11, 1990]



Sec. 64.89   Cargo pump unit.

    (a) A cargo pump unit that fills or discharges a portable tank must 
be--
    (1) Constructed of materials that are compatible with the product to 
be pumped; and
    (2) Designed to be compatible with the hazard associated with the 
product to be pumped.
    (b) The cargo pump power unit must be--
    (1) Diesel;
    (2) Hydraulic;
    (3) Pneumatic; or
    (4) Electric.
    (c) The starting system for a cargo pump power unit must be designed 
to be compatible with the hazard associated with the product to be 
pumped.
    (d) A diesel engine that is used to drive a cargo pump must have a 
spark arrestor on the exhaust system.



Sec. 64.91   Relief valve for the cargo pump discharge.

    The cargo pump discharge must have a relief valve that is--
    (a) Fitted between the cargo pump discharge and the shut-off valve, 
with the relief valve discharge piped back to the cargo pump suction or 
returned to the tank; and
    (b) Set at the maximum design pressure of the piping and discharge 
hose, or less.



Sec. 64.93   Pump controls.

    (a) A pressure gauge must be installed--
    (1) On the pump discharge;
    (2) Near the pump controls; and
    (3) Visible to the operator.
    (b) A pump must have a remote, quick acting, manual shutdown that is 
conspicuously labeled and located in an easily accessible area away from 
the pump. The quick acting, manual shutdown for remote operation must 
provide a means of stopping the pump power unit.



Sec. 64.95   Piping.

    (a) Piping, valves, flanges, and fittings used in the pumping system 
must be designed in accordance with part 56 of this chapter.
    (b) A cargo loading and discharge header or manifold must--
    (1) Have stop valves to prevent cargo leakage; and
    (2) Be visible to the operator at the cargo pump controls.

[[Page 314]]

    (c) Each pipe and valve in the pumping system that has an open end 
must have a plug or cap to prevent leakage.
    (d) Each hose connection must be threaded or flanged except for a 
quick connect coupling that may be specifically accepted by the U.S. 
Coast Guard in accordance with the procedures in Sec. 50.25-15 of this 
chapter.
    (e) A non-return valve must be in the pump discharge if a backflow 
condition may occur during pumping.
    (f) Any non-metallic flexible hose that is used in the piping system 
must comply with Sec. 56.60-25(c) of this chapter.



Sec. 64.97   Cargo hose.

    Each hose assembly, consisting of couplings and a hose that has an 
inside diameter--
    (a) Larger than three inches, must meet the requirements in 33 CFR 
154.500; or
    (b) Three inches or less, must be designed to withstand the pressure 
of the shutoff head of the cargo pump or pump discharge relief valve 
setting, but not less than 100 pounds per square inch.


[[Page 315]]



                                  INDEX

                      SUBCHAPTER F--MARINE ENGINEERING

Editorial Note: This listing is provided for informational 
purposes only. It is compiled and kept up-to-date by the Coast 
Guard.

A

                                               Part, subpart, or section

Part, subpart, or section

Accumulators
                                                                58.30-25
Adamson ring furnace
                                                              59.10-5(d)
Alarms, superheaters
                                                          52.01-95(b)(2)
Alignment, pipe welding
                                                          56.70-10(a)(3)
Allowance for corrosion
                                                                54.01-35
Aluminum
                                       56.10-5(c)(5), 56.60-20, 58.30-17
ANSI Code B 31.1
                                                                 56.01-5
ANSI Standards (Formerly USASI; Formerly ASA)
                                                                56.01-2,
                                                     56.60-1(b), 58.03-1
Appeals
                                                                50.20-40
Approval, plan (see Plan approval)
ASA (see ANSI)
ASME Code
                                               52.01-2, 54.01-2, 56.01-2
ASME Code, modifications:
Section I........................................................52.01-2
Section III......................................................55.01-3
Section IV.......................................................53.01-3
Section VIII.....................................................54.01-2
Section IX.......................................................57.02-2
ASTM specifications
                                                     56.01-2, 56.60-1(b)
Astern power
                                                                 58.05-5
Attachments to boilers
                                                       52.05-30, 52.15-5
Auxiliary steering
                                                                58.25-25

B

Backfire flame arrester
                                                                 58.10-5
Backing rings, welded pipe joints
                                                                 56.70-5
Bellows expansion joints
                                                      56.35-10, 56.35-15
Bend test
                                                                 57.06.4
Bending of pipes
                                                                 56.80-5
Bite-type fittings
                                             56.30-25(f)(1), 56.30-40(b)
Blanks, piping systems
                                                                 56.25-7
Blowoff piping
                                                                56.50-40
Boilers:
Firetube...........................................................52.20
Fuel oil systems................................................56.50-65
Inspection of......................................................61.05
Miniature........................................................52.25-5
Repairs, miscellaneous.............................................59.15
Safety factor...................................................52.01-55
Superheater temperature control...........................52.01-95(b)(2)
Tests required.....................................................61.05
Watertube..........................................................52.15

[[Page 316]]

Bolting
                                               56.25-20, Table 56.50-105
Bonnet joints, valves
                                                              56.20-9(b)
Branch connections, welded
                                                             56.70-15(g)
Brass
                                                       56.10-5, 56.60-20
Brazing:
                                                                      57
Piping systems.....................................................56.75
Steam air heaters...............................52.01-95(d), 56.30-30(b)
Butt welds
                                                      56.70-10, 56.70-15
Bypasses:
Steam systems................................................56.50-15(c)
Valve...........................................................56.20-20

C

Calculations:
Boilers.......................................................52.01-5(b)
Pipe pressure stress.........................................56.07-10(e)
Pipe thermal stress..............................................56.35-1
Pressure vessels..........................................54.01-18(b)(1)
Requirement for.................................................50.20-25
Cargo hatch operating systems
                                                           58.30-1(a)(2)
Cargo oil systems
                                                                56.50-60
Cast iron components, restrictions:
Castings........................................56.60-1(a) footnote (14)
Flanges......................................................56.25-10(b)
General.........................................................56.60-10
Heating boilers...........................................53.01-10(a)(2)
Overboard discharges.........................................56.50-95(f)
Power boilers................................................52.01-90(d)
Relief valves................................................54.15-10(f)
Shock testing................................................58.30-15(f)
Valves........................................................56.20-9(b)
Water column piping.........................................52.01-110(c)
Castings
                                                              56.60-1(a)
Caulked joints
                                                                56.30-27
Certification of material
                                                                   50.25
Charpy V-notch test
                                                              54.05-5(a)
Circulating pumps
                                                                56.50-45
Circumferential joints
                                                                52.05-45
Collision bulkhead penetrations
                                                              56.50-1(b)
Combustion chambers
                                                          52.01-3(b)(10)
Combustion control system
                                                            63.15, 63.20
Condensate pumps
                                                                56.50-35
Construction:
Electric hot water supply boilers (heaters)......................63.25-3
Nuclear pressure vessels...............................55.10-20, 55.15-5
Piping systems.....................................................56.65
Power boilers......................................................52.05
Pressure vessels............................................54.20, 54.25
Valves...........................................................56.20-9
Control, superheater temperature
                                                          52.01-95(b)(2)
Copper & alloys, use of
                                                    56.10-5(c), 56.60-20
Correspondence, records kept
                                                                50.20-33
Corroded surfaces
                                                                59.10-10
Corrosion, pressure vessels
                                                                54.01-35
Corrosion allowance
                                                       54.25-5, 54.01-35
Corrugated furnaces
                                                                52.20-10
Cracks
                                                                 59.10-5

[[Page 317]]

Cylinders, LPG for cooking & heating
                                                             58.16-10(b)
Installation....................................................58.16-18
Operation.......................................................58.16-30
Valves..........................................................58.16-15

D

Data report, manufacturer's
                                           52.01-145, 54.10-25, 55.10-35
Definitions, administrative:
Coast Guard number..............................................50.10-30
Coast guard symbol..............................................50.10-25
Commandant.......................................................50.10-1
District Commander...............................................50.10-5
Headquarters....................................................50.10-20
Marine inspector................................................50.10-15
Officer in Charge, Marine Inspection (OCMI).....................50.10-10
Definitions, general:
Accumulator..................................................58.30-25(a)
Boiler:
auxiliary..................................................52.01-3(a)(2)
donkey.....................................................52.01-3(a)(2)
fired steam................................................52.01-3(a)(8)
flue.......................................................52.01-3(a)(8)
main power.................................................52.01-3(a)(1)
packaged...................................................52.01-3(a)(7)
scotch.....................................................52.01-3(a)(4)
unfired steam..............................................52.01-3(a)(9)
water......................................................52.01-3(a)(6)
watertube..................................................52.01-3(a)(3)
Boiler, attachments:
auxiliary steam stop valve.................................52.01-3(e)(3)
blowoff valve..............................................52.01-3(e)(6)
dry pipe...................................................52.01-3(e)(7)
feed valve.................................................52.01-3(e)(5)
fusible plugs...................................52.01-3(e)(11); 52.01-50
main steam stop valve......................................52.01-3(e)(2)
manifold...................................................52.01-3(e)(4)
mountings..................................................52.01-3(e)(1)
salinometer cocks.........................................52.01-3(e)(10)
test cocks.................................................52.01-3(e)(9)
water column...............................................52.01-3(e)(8)
Boiler, fabrication:
access or inspection of opening............................52.01-3(f)(7)
alteration.................................................52.01-3(f)(2)
beading....................................................52.01-3(f)(4)
bell-mouthing..............................................52.01-3(f)(5)
expanding..................................................52.01-3(f)(3)
openings........................................52.01-3(f)(8), 52.01-100
repair..............................................52.01-3(f)(1); 59.70
telltale hole..............................................52.01-3(f)(6)
Combustion chamber........................................52.01-3(b)(10)
back sheet............................................52.01-3(b)(10)(vi)
common................................................52.01-3(b)(10)(ii)
crown................................................52.01-3(b)(10)(iii)
curved bottom plate...................................52.01-3(b)(10)(iv)
separate...............................................52.01-3(b)(10)(i)
top plate............................................52.01-3(b)(10)(iii)
tube sheet.............................................52.01-3(b)(10)(v)

[[Page 318]]

Crowfoot...................................................52.01-3(c)(8)
Domes......................................................52.01-3(b)(7)
Economizer.................................................52.01-3(b)(6)
Flues.....................................................52.01-3(b)(11)
Fluid Conditioner fittings...........................56.07-5(d), 56.15-5
Furnace:
corrugated..............................................52.01-3(b)(9)(i)
plain..................................................52.01-3(b)(9)(ii)
Girder....................................................52.01-3(c)(13)
Header.....................................................52.01-3(b)(4)
Heads:
dished..................................................52.01-3(b)(2)(i)
stayed.................................................52.01-3(b)(2)(ii)
Ligaments:
circumferential.......................................52.01-3(b)(14)(ii)
diagonal.............................................52.01-3(b)(14)(iii)
longitudinal...........................................52.01-3(b)(14)(i)
Liquefied Petroleum Gas (LPG).................................58.16-5(a)
Marine portable tank.............................................64.5(a)
Piping:
fittings and appurtenances....................................56.07-5(d)
nominal diameter..............................................56.07-5(b)
nonstandard fittings..........................................56.07-5(e)
schedule......................................................56.07-5(c)
Pressure, maximum allowable working................54.10-5, Part 64.5(d)
Pressure relief devices:
nonreclosing pressure relief devices:......................52.01-3(d)(2)
bursting disk..............................................52.01-3(d)(2)
breaking pin...............................................52.01-3(d)(2)
explosion rupture disk.....................................52.01-3(d)(2)
frangible disk.............................................52.01-3(d)(2)
fusible plug...............................................52.01-3(d)(2)
rupture disk...............................................52.01-3(d)(2)
shear pin..................................................52.01-3(d)(2)
pressure relief valve......................................52.01-3(d)(1)
pilot-operated.............................................52.01-3(d)(1)
temperature-actuated.......................................52.01-3(d)(1)
relief valve, power actuated............................52.01-3(d)(1)(v)
safety valve............................................52.01-3(d)(1)(i)
  pressure-loaded pilot actuated:
  spring-loaded....................................52.01-3(d)(1)(i)(a)..
  spring-loaded pilot..............................52.01-3(d)(1)(i)(d)..
  spring-loaded pilot actuated.....................52.01-3(d)(1)(i)(c)..
safety relief valve:
balanced.........................................52.01-3(d)(1)(iii)(b)..
conventional.....................................52.01-3(d)(1)(iii)(a)..
internal spring..................................52.01-3(d)(1)(iii)(c)..
Reinforcement.............................................52.01-3(c)(15)
Screwed joints..................................................56.30-20
Shell, of boiler...........................................52.01-3(b)(1)
Stay:
crowfoot...................................................52.01-3(c)(9)
diagonal..................................................52.01-3(c)(10)
dog.......................................................52.01-3(c)(12)
gusset....................................................52.01-3(c)(11)
sling......................................................52.01-3(c)(7)

[[Page 319]]

through....................................................52.01-3(c)(2)
Staybolt:
flexible...................................................52.01-3(c)(6)
hollow screw...............................................52.01-3(c)(5)
solid screw................................................52.01-3(c)(3)
Stayed surfaces............................................52.01-3(c)(1)
Steam chimneys.............................................52.01-3(b)(8)
Structural stiffeners.....................................52.01-3(c)(14)
Superheater................................................52.01-3(b)(5)
Tube:
electric-resistance welded............................52.01-3(b)(12)(ii)
seamless...............................................52.01-3(b)(12)(i)
stay.................................................52.01-3(b)(12)(iii)
Vacuum relief valve........................................52.01-3(d)(3)
Water wall.................................................52.01-3(b)(3)
Welded collar..............................................52.01-3(c)(4)
Tank.............................................................64.5(b)
Test pressure....................................................64.5(e)
Total containment pressure.......................................64.5(c)
Design:
Fluid power & control systems....................................58.30-5
Nuclear powerplant components....................................55.10-5
Piping systems..........................................56.07-5, 56.50-1
Power boilers..........................................52.01-2, 52.01-95
Pressure vessels.................................................54.20-3
Refrigeration machinery..........................................58.20-5
Diesel engine installations: 
                                                                58.10-10
Fuel systems....................................................56.50-75
Fuel tanks......................................................58.50-10
Discharge, overboard
                                                                56.50-95
Disks, rupture
                                                                54.15-13
Drain inspection tanks
                                                             56.50-60(b)
Drainage
                                                                56.50-95
Drip pans
                                             56.50-65(b)(3), 56.50-60(k)
Drop weight tests
                                                              54.05-5(b)
Drydock examination
                                                                 61.20-5
Ductile iron
                                                                56.60-15
Dynamic effects on piping systems
                                                             56.07-10(c)

E

Economizer, design pressure
                                                             52.01-95(c)
Electrodes
                                                              57.03-1(e)
Emergency bilge suction
                                                             56.50-50(f)
Evaporators
                                                             54.01-10(b)
Examination:
Drydock..........................................................61.20-5
Piping..........................................................56.95-10
Power boilers...................................................52.05-20
Welded joints...................................................52.05-20
Exemptions, from:
Hydrostatic tests.............................................61.10-5(e)
Shop inspection & plan approval.................................54.01-15
Exhaust, internal combustion engine
                                                              58.10-5(d)
Expansion joints
                                                      56.35-10, 56.35-15

[[Page 320]]

F

Fabrication:
Boilers............................................................52.05
Nuclear powerplant components..........................55.10-20, 55.15-5
Pressure vessels............................................54.20, 54.25
Fabrication inspection
                                                                   50.30
Feed piping & pumps, boiler
                                                                56.50-30
Ferritic steels with tensile properties enhanced by heat treatment
                                                                54.25-20
Filler metals
                                                        56.75-5, 57.02-5
Filling pipes, cargo oil systems
                                                                56.50-60
Fire test, Marine Dept. of UL, Inc. (Yacht Safety Bureau)
                                                                58.50-15
Fittings, piping
                                                                 56.15-1
Flanged joints
                                                                56.30-10
Flanges
                                                                 56.25-5
Flexible hose
                                             56.50-70(b)(2), 56.60-25(c)
Flexible pipe joints
                                                                56.30-40
Fluid conditioner fittings
                                                                 56.15-5
Fluid power and control systems, miscellaneous
                                                                58.30-50
Fluid power cylinders
                                                                58.30-30
Fluid power hose & fittings
                                                                58.30-20
Forming, pipe
                                                                56.80-10
Formulas, design:
Bilge suction pipes..........................................56.50-50(d)
Cargo tank safety relief valves.................................54.15-25
Evaporator safety relief valves.................................54.15-15
Ferritic steels, service temperature............................54.25-10
Heat exchanger relief valves....................................54.15-15
Strain in cold formed parts...................................54.30-5(d)
Forepeak tank bulkhead valves.................................56.50-1(b)
Foundations, boiler
                                                               52.01-130
Fuel oil systems
                                                      56.50-60, 56.50-65
Fuel pumps:
Gasoline fuel systems........................................56.50-70(j)
Main & aux. machinery............................................58.05-1
Fuel tanks, independent:
Diesel..........................................................58.50-10
Gasoline.........................................................58.50-5
Fusible plugs
                                                                52.01-50

G

Gages, tank level indicator
                                                               52.01-110
(See sounding devices and liquid level gaging devices)
Gaging, special requirements
                                                                56.50-10
Galvanizing:
Ferrous pipe..................................................56.60-3(a)
Independent I.C.E. fuel tanks...............Table 58.50-5(a) footnote 4, 
                                                          58.50-10(a)(9)
Gas appliances, approvals
                                                             58.16-10(a)
Gas turbine installations
                                                                58.10-15
Gaskets
                                                                56.25-15
Gasoline engine installations
                                                                 58.10-5
Gasoline fuel systems
                                                                56.50-70
Girth joints (see Circumferential joints)
Grease extractors, boiler feed piping
                                                             56.50-30(c)
Group feed system
                                                             56.50-30(d)

[[Page 321]]

H

Handhole openings in boilers
                                                               52.01-100
Headers, boiler tube connections
                                                                 52.15-5
Heat exchangers
                                          54.01-5, 54.01-10(b), 54.15-15
Heat treatment:
Boilers.........................................................52.05-15
Pipe bends & formed components..................................56.80-15
Pipe welds.........................................................56.85
Pressure vessels.................................................54.25-7
Heating boilers
                                                                      53
Hubs, on flanges
                                                                56.30-10
Hydraulic systems
                                                                   58.30
Hydrostatic pressure tests:
Boilers......................................................61.05-10(b)
Fluid power systems.............................................58.30-35
Piping...........................................................56.97-1
Pressure vessels..............................................61.10-5(d)

I

Impact test, cast iron & aluminum
                                                                58.30-17
Inspection, fabrication
                                                                   50.30
Inspection & tests:
Boilers.................................................52.01-135, 61.05
Heating boilers..................................................53.10-3
Machinery & equipment..............................................61.20
Nuclear reactor power plants.......................................61.25
Piping systems.....................................................61.15
Pressure vessels...................................................61.10
Tanks, portable....................................................64.77
Inspectors, access to plants
                                                        50.25-7, 56.95-5
Installation:
Boilers........................................................52.01-130
LPG cooking & heating equipment.................................58.16-18
Refrigeration machinery.........................................58.20-15
Instrument piping
                                                             56.50-97(a)
Insulation, piping systems
                                                              56.50-1(k)
Internal combustion engine (I.C.E.) installations
                                                                   58.10
Iron, cast & malleable
                                                                56.60-10
Iron, nodular & ductile
                                                                56.60-15

J

Joints:
Circumferential.................................................52.05-45
Joints, piping: 
                                                                   56.30
Brazed..........................................................56.30-30
Caulked.........................................................56.30-27
Compression.....................................................56.30-25
Detachable....................................................56.50-1(j)
Expanded........................................................56.30-15
Flanged.........................................................56.30-10
Flared..........................................................56.30-25
Rolled..........................................................56.30-15
Screwed.........................................................56.30-20
Sleeve coupled..................................................56.30-35
Welded...........................................................56.30-5

[[Page 322]]

K

Keel cooler installations
                                                                56.50-96

L

Lap joints
                                                          56.30-10(b)(7)
Leak tests, piping
                                                                 56.97-1
Lining, noncorrosive
                                                          54.01-35(d)(2)
Liquid penetrant examination
                                                          56.95-10(c)(4)
Liquefied petroleum gas, defined
                                                                 58.16-5
Liquid-level gaging devices: 
                                                               52.01-110
Diesel fuel tanks.........................................58.50-10(a)(6)
Gasoline fuel tanks........................................58.50-5(a)(6)
Loadings for pressure vessels
                                                                54.01-30
Low temperature operation: 
                                                                   54.03
Ferritic steels.................................................54.25-10
Ferritic steels (HT)............................................54.25-20
High alloy steels...............................................54.25-15
Lubricating oil system
                                                                56.50-80

M

Machinery, main & auxiliary: 
                                                                      58
main propulsion....................................................58.05
refrigeration......................................................58.20
Magnetic particle testing
                                                          56.95-10(c)(5)
Malleable iron
                                                                56.60-10
Manholes
                                                               52.01-100
Manufacturer's certification of material
                                                                 50.25-3
Marine portable tanks
                                                                      64
Marking, standard for valves, etc.
                                                              56.60-1(b)
Materials:
Acceptable standards, piping.....................................56.60-1
Certification of toughness tests................................54.05-10
Ferrous..........................................................56.60-3
Limitations on...................................................56.60-2
Nonferrous......................................................56.60-20
Non-metallic....................................................56.60-25
Piping systems...................................................56.60-1
Power boilers...................................................52.01-90
Steels for pressure vessels........................................54.25
Maximum allowable working pressure
                                                                 54.10-5
Mechanical stress relief
                                                                   54.30
Metallic flexible hose
                                                             56.50-65(a)
Miniature boilers
                                                                 52.25-5
Motorboats, steam-propelled
                                                                50.05-20
Mud drums (see Shells or Headers)

N

Nameplates, stamping thereon
                                                                50.10-25
Nondestructive testing
                                                             56.95-10(c)
Nonmetallic flexible hose
                                             56.50-70(b)(2), 56.60-25(c)
Nonmetallic pipe
                                                 56.10-5(d), 56.60-25(a)
Nonstandard fittings
                                                  56.07-5(e), 56.15-1(c)
Nozzles (see Connections)
Nuclear powerplant components
                                                                      55
Nuts (see Bolting)

[[Page 323]]

O

Officer in Charge, Marine Inspection (OCMI)
                                                                50.10-10
Oil conveying piping system
                                                                56.50-60
Oil pollution prevention
                                                             56.50-50(n)
Openings:
Bulkheads........................................................56.50-1
Diesel fuel tanks...............................................58.50-10
Gasoline fuel tanks..............................................58.50-5
Power boilers..................................................52.01-100
Power boilers, repairs to.......................................59.10-20
Pressure vessel protective devices............................54.15-5(k)
Organic fluid vaporizer generators
                                                                52.25-10
Outlets & drains:
Diesel fuel systems.......................................56.50-75(b)(5)
Gasoline fuel systems........................................56.50-70(e)
Overboard discharges
                                                                56.50-95

P

Patches, in shells & tube sheets
                                                                59.10-20
Performance qualifications, welding & brazing
                                                          57.02-2, 57.05
Pipe, types
                                                                 56.10-5
Pipe couplings, flexible
                                                                56.30-40
Pipe penetrations of bulkheads
                                                                 56.50-1
Pipe stress calculations
                                                                 56.35-1
Piping: 
                                                                      56
Bilge and ballast...............................................56.50-50
Blowoff.........................................................56.50-40
Boiler feed.....................................................56.50-30
Instrument...................................................56.50-97(a)
Low temperature................................................56.50-105
Nonacceptable joints.....................................56.50-105(a)(4)
Pressure relief.................................................56.50-20
Steam and exhaust...............................................56.50-15
Steering gear...................................................58.25-70
Tank vent.......................................................56.50-85
Plan approval:
Appeals.........................................................50.20-40
Calculations submitted..........................................50.20-25
Copies of plans.................................................50.20-10
Correspondence file.............................................50.20-33
Exemptions from.................................................54.01-15
Marine portable tank................................................64.7
Previously approved.............................................50.20-15
Plastic piping components
                                                             56.60-25(d)
Plates, for welding tests
                                                                   57.06
Plates, steel
                                                                 54.25-3
Plugs, fusible
                                                                52.01-50
Pneumatic systems
                                                          58.30-1(a)(13)
Pneumatic tests
                                                   56.97-25(b), 56.97-35
Polyvinyl chloride (PVC) materials
                                                    56.10-5(d), 56.60-25
Postweld heat treatment
                                      54.25-7, 56.50-105(a)(3), 56.85-15
Power boilers
                                                                      52
Power operated valves
                                                           56.50-1(g)(1)
Preheat treatment of welds
                                                                56.85-10
Pressure, maximum allowable working
                                                                 54.10-5
Pressure gages
                                                              54.15-5(f)

[[Page 324]]

Pressure relief piping
                                                                56.50-20
Pressure relief valves (see Relief valves)
Pressure relieving devices, heating boilers
                                                                   53.05
Pressure vessels
                                                                      54
Procedure qualifications, welding & brazing
                                                                   57.03
Production tests, welded plates
                                                         54.05-16, 57.06
Proof tests, hydrostatic
                                          54.10-5(Table), 58.30-17(c)(2)
Bilge...........................................................56.50-55
Circulating.....................................................56.50-45
Condensate......................................................56.50-35
Hydraulic.......................................................58.30-15

Q

Qualification, welding: 
                                                                      57
Limited space....................................................57.05-3
Low temperature materials.......................................54.05-15
Performance........................................................57.05
Procedure..........................................................57.03
Tests............................................................57.01-1

R

Radiography
                                          52.05-20, 54.25-8, 56.95-10(c)
Reach rods
                                                           56.50-1(g)(2)
Records, maintenance of
                                                                50.20-33
Refrigeration machinery
                                                                   58.20
Refrigeration piping
                                                                58.20-20
Relief capacities, minimum for cargo tanks
                                                                54.15-25
Relief valves:
Hot water boilers................................................53.05-2
Nuclear powerplant components...................................55.10-40
Power boilers..................................................52.01-120
Pressure vessels......................................54.15-10, 54.15-15
Tanks, portable....................................................64.59
Repairs:
Bagged or blistered shell plates................................59.15-10
General..........................................................59.01-5
Miscellaneous boiler...............................................59.15
Reports, manufacturer's data
                                 52.01-145, 53.10-15, 54.10-25, 55.10-35
Resilient material, use in valves
                                                                56.20-15
Responsibility of manufacturer
                                                              50.30-1(a)
Rivets
                                                                59.10-15
Rubber, use in valves
                                                                56.20-15
Rupture disks
                                                                54.15-13

S

Safety and relief valve piping
                                                                56.50-25
Safety factor, boilers
                                                                52.01-55
Safety valves:
Boiler......................................................52.01-120(a)
Evaporators & heat exchangers...................................54.15-15
Superheater.................................................52.01-120(b)
Scuppers
                                                                56.50-95
Sea chests
                                                                56.50-95
Seal welding
                                                 56.30-5(e), 56.70-15(e)
Seamless pipe & tube
                                                      56.60-1(a) (Table)
Shell, heat exchanger
                                                             54.15-15(f)
Shell connections
                                                                56.50-95

[[Page 325]]

Shell plates, repairs
                                                                59.15-10
Shock tests (see Tests)
Shop inspection, exemptions
                                                                54.01-15
Sounding devices
                                                   56.50-70(g), 56.50-90
Spot examination
                                                          56.95-10(c)(2)
Stamping:
Boilers........................................................52.01-140
General...............................................50.10-25, 50.10-30
Heating boilers.................................................53.10-10
Stayed furnaces, repairs to
                                                                 59.15-5
Stayed tube sheets, repairs
                                                             59.10-10(d)
Stays
                                                         52.01-3(Figure)
Steam air heaters
                                             52.01-95(d), 56.30-30(b)(1)
Steam generating pressure vessels
                                                                54.01-10
Steam-propelled motorboats
                                                                50.05-20
Steam and exhaust piping
                                                                56.50-15
Steel, acceptable specifications
                                                 54.25, 56.50-105, 56.60
Steering gear: 
                                                                   58.25
Tests............................................................61.20-1
Stress calculations:
Dynamic......................................................56.07-10(c)
Thermal..........................................................56.35-1
Stress relief, mechanical
                                                                   54.30
Stress values, acceptable materials
                                                      56.60-1(a) (Table)
Stresses, boiler design
                                                             52.01-95(f)
Stuffing boxes, valves
                                                              56.50-1(e)
Superheater, design pressure
                                                             52.01-95(b)
Superheater temperature control
                                                          52.01-95(b)(2)
Supports:
Boiler.........................................................52.01-130
Nuclear powerplant components.................................55.10-5(b)
Piping.............................................................56.35

T

Tables:
Acceptable Materials and toughness test criteria...............56.50-105
Adopted specifications and standards..........................56.60-1(a)
Adopted Standards applicable to piping........................56.60-1(b)
Adopted Specifications not listed in the ASME Code............56.60-2(a)
Certification of materials.......................................50.25-1
Charpy V-notch impact requirements...........................54.05-20(a)
Hydrostatic tests...............................................61.05-10
Materials:
diesel fuel tanks............................................58.50-10(a)
gasoline fuel tanks...........................................58.50-5(a)
piping systems................................................56.60-1(a)
Nonmetallic flexible hose....................................56.60-25(c)
Power bilge pumps............................56.50-55(a), 56.50-55(b)(1)
Pressure levels..................................................54.10-5
Pressure piping classification...................................56.04-2
Pressure vessel classification................................54.01-5(b)
Tack welds
                                                          56.70-15(b)(4)
Tanks, fuel (see Fuel Tanks)
Tanks, marine portable
                                                                      64
Telltale holes in pressure vessels
                                                             54.01-35(c)
TEMA, adoption of standards for heat exchangers
                                                                 54.01-2

[[Page 326]]

Temperature controls, electric hot water supply boilers
                                                                 63.25-3
Tests:
Boiler.............................................................61.05
Impact shock....................................................58.30-17
Machinery & equipment..............................................61.20
Nonstandard piping system components.............................56.97-5
Nuclear reactor power plants.......................................61.25
Pressure vessels...................................................61.10
Power piping................................................56.97, 61.15
Tanks, portable....................................................64.77
Toughness..........................................................54.05
Thermal fluid heaters, fired
                                                                52.01-35
Thermometer wells
                                                              56.07-5(d)
Threaded joints
                                                                56.30-20
Toughness tests
                                                                   54.05
Tubing: 
                                                                 56.10-5
Boiler fuel oil service systems..............................56.50-65(a)
Diesel fuel systems..........................................56.50-75(a)
Gasoline fuel systems........................................56.50-70(a)

U

Ultrasonic examination of welds
                                       52.05-20, 56.60-2, 56.95-10(c)(3)
Unfired pressure vessels
                                                                      54
Unfired steam boilers
                                                                54.01-10
Unit feed system
                                                             56.50-30(e)
USASI (see ANSI)

V

Valves: 
                                                                   56.20
Bypasses........................................................56.20-20
Certification requirements....................................50.25-1(c)
Construction.....................................................56.20-9
Ends.............................................................56.20-7
Marking..........................................................56.20-5
Power actuated.............................56.50-1(g)(1), 56.50-60(d)(3)
Resilient material..............................................56.20-15
Remote operated...............................................56.50-1(g)
Valves, relief (see relief valves)
Van Stone lap joint flanges
                                                          56.30-10(b)(7)
Vent pipes: 
                                                                56.50-85
Diesel fuel tanks.........................................56.50-75(b)(7)
Gasoline fuel tanks..........................................56.50-70(h)

W

Water columns
                                                               52.01-110
Watertube boilers
                                                                   52.15
Welded pipe & tubing, restrictions
                                                              56.60-2(b)
Welding: 
                                                                 Part 57
Backing rings, limitation........................................56.70-3
Limited space qualifications.....................................57.05-3
Performance qualifications.........................................57.05
Procedure qualifications.................................57.03, 54.05-15
Production tests.........................................57.06, 54.05-16
Toughness test acceptance criteria..............................54.05-17
Transfer of performance qualifications...........................57.05-2
Welding, of heating boilers
                                                                   53.13

[[Page 327]]

Welding, of QT steels
                                                                54.25-25
Welding neck flanges
                                                   56.30-10(b) (8) & (9)
Welds:
Attachment.............................54.20-3(d), 56.70-15(g), 52.05-30
Butt............................................................56.70-15
Fillet..........................................56.70-10(b), 56.70-15(d)
Seal.........................................................56.70-15(e)
Socket........................................56.30-5(c), 56.30-10(b)(4)
Socket, restrictions on.........................56.50-105(a)(4) & (b)(4)
Welds, HT of in piping systems
                                                                   56.85
Wrapper plates, repairs
                                                                59.10-35

X

X-ray
                                          52.05-20, 54.25-8, 56.95-10(c)

[[Page 328]]



         SUBCHAPTER G--DOCUMENTATION AND MEASUREMENT OF VESSELS





PART 66--[RESERVED]






PART 67--DOCUMENTATION OF VESSELS--Table of Contents




                           Subpart A--General

Sec.
67.1  Purpose.
67.3  Definitions.
67.5  Vessels eligible for documentation.
67.7  Vessels requiring documentation.
67.9  Vessels excluded from or exempt from documentation.
67.11  Restriction on transfer of an interest in documented vessels to 
          foreign persons; foreign registry or operation.
67.12  Right of appeal.
67.13  Incorporation by reference.
67.14  OMB control numbers assigned pursuant to the Paperwork Reduction 
          Act.

 Subpart B--Forms of Documentation; Endorsements; Eligibility of Vessel

67.15  Form of document--all endorsements.
67.17  Registry endorsement.
67.19  Coastwise or Great Lakes endorsement.
67.21  Fishery endorsement.
67.23  Recreational endorsement.

      Subpart C--Citizenship Requirements for Vessel Documentation

67.30  Requirement for citizen owner.
67.31  Stock or equity interest requirements.
67.33  Individual.
67.35  Partnership.
67.36  Trust.
67.37  Association or joint venture.
67.39  Corporation.
67.41  Governmental entity.
67.43  Evidence of citizenship.
67.45  Citizenship savings provision for fishing vessels.
67.47  Requirement for Maritime Administration approval.

         Subpart D--Title Requirements for Vessel Documentation

67.50  Requirement for title evidence.
67.53  Methods of establishing title.
67.55  Requirement for removal from foreign registry.
67.57  Extent of title evidence required for initial documentation.
67.59  Extent of title evidence required for change in ownership of a 
          documented vessel.
67.61  Extent of title evidence required for vessels returning to 
          documentation.
67.63  Extent of title evidence required for captured, forfeited, 
          special legislation, and wrecked vessels.

              Subpart E--Acceptable Title Evidence; Waiver

67.70  Original owner.
67.73  Transfers prior to documentation.
67.75  Transfers by sale or donation subsequent to documentation.
67.77  Passage of title by court action.
67.79  Passage of title without court action following death of owner.
67.81  Passage of title in conjunction with a corporate merger or 
          similar transaction.
67.83  Passage of title by extra-judicial repossession and sale.
67.85  Change in general partners of partnership.
67.87  Change of legal name of owner.
67.89  Waiver of production of a bill of sale eligible for filing and 
          recording.
67.91  Passage of title pursuant to operation of State law.

         Subpart F--Build Requirements for Vessel Documentation

67.95  Requirement for determination.
67.97  United States built.
67.99  Evidence of build.
67.101  Waiver of evidence of build.

 Subpart G--Tonnage and Dimension Requirements for Vessel Documentation

67.105  Requirement for determination.
67.107  System of measurement; evidence.

      Subpart H--Assignments and Designations Required for Vessel 
                              Documentation

67.111  Assignment of official number.
67.113  Managing owner designation; address; requirement to report 
          change of address.
67.117  Vessel name designation.
67.119  Hailing port designation.

        Subpart I--Marking Requirements for Vessel Documentation

67.120  General requirement.
67.121  Official number marking requirement.
67.123  Name and hailing port marking requirements.
67.125  Disputes.

[[Page 329]]

      Subpart J--Application for Special Qualifications for Vessel 
                              Documentation

67.130  Submission of applications.
67.131  Forfeited vessels.
67.132  Special legislation.
67.133  Wrecked vessels.
67.134  Captured vessels.

  Subpart K--Application for Documentation, Exchange or Replacement of 
  Certificate of Documentation, or Return to Documentation; Mortgagee 
                           Consent; Validation

67.141  Application procedure; all cases.
67.143  Restriction on withdrawal of application.
67.145  Restrictions on exchange; requirement and procedure for 
          mortgagee consent.
67.149  Exchange of Certificate of Documentation; vessel at sea.
67.151  Replacement of Certificate of Documentation; special procedure 
          for wrongfully withheld document.

    Subpart L--Validity of Certificates of Documentation; Renewal of 
     Endorsement; Requirement for Exchange, Replacement, Deletion, 
                              Cancellation

67.161  Validity of Certificate of Documentation.
67.163  Renewal of endorsement.
67.165  Deposit of Certificate of Documentation.
67.167  Requirement for exchange of Certificate of Documentation.
67.169  Requirement for replacement of Certificate of Documentation.
67.171  Deletion; requirement and procedure.
67.173  Cancellation; requirement and procedure.

                  Subpart M--Miscellaneous Applications

67.175  Application for new vessel determination.
67.177  Application for foreign rebuilding determination.

                          Subpart N--[Reserved]

   Subpart O--Filing and Recording of Instruments--General Provisions

67.200  Instruments eligible for filing and recording.
67.203  Restrictions on filing and recording.
67.205  Requirement for vessel identification.
67.207  Requirement for date and acknowledgment.
67.209  Required number of copies.
67.211  Requirement for citizenship declaration.
67.213  Place of filing and recording.
67.215  Date and time of filing.
67.217  Termination of filing and disposition of instruments.
67.219  Optional filing of instruments by facsimile.

   Subpart P--Filing and Recording of Instruments--Bills of Sale and 
                           Related Instruments

67.220  Requirements.
67.223  Filing limitation.

  Subpart Q--Filing and Recording of Instruments--Mortgages, Preferred 
                   Mortgages, and Related Instruments

67.231  General requirements; optional application for filing and 
          recording.
67.233  Restrictions on recording mortgages, preferred mortgages, and 
          related instruments.
67.235  Requirements for mortgages.
67.237  Requirements for assignments of mortgages.
67.239  Requirements for assumptions of mortgages.
67.241  Requirements for amendments of or supplements to mortgages.
67.243  Requirements for instruments subordinating mortgages.
67.245  Requirements for interlender agreements.

Subpart R--Filing and Recording of Instruments--Notices of Claim of Lien 
                      and Supplemental Instruments

67.250  General requirements.
67.253  Requirements for notices of claim of lien.
67.255  Restrictions on filing and recording.
67.257  Requirements for assignments of notices of claim of lien.
67.259  Requirements for amendments to notice of claim of lien.

                   Subpart S--Removal of Encumbrances

67.261  General requirements.
67.263  Requirement for removal of encumbrances by court order, 
          affidavit, or Declaration of Forfeiture.
67.265  Requirements for instruments evidencing satisfaction or release.

      Subpart T--Abstracts of Title, and Certificates of Ownership

67.301  Issuance of Abstract of Title.
67.303  Issuance of Certificate of Ownership.

                      Subpart U--Special Provisions

67.311  Alteration of Certificate of Documentation.

[[Page 330]]

67.313  Requirement to have Certificate of Documentation on board.
67.315  Requirement to produce Certificate of Documentation.
67.317  Requirement to renew endorsements on the Certificate of 
          Documentation.
67.319  Requirement to report change in vessel status and surrender 
          Certificate of Documentation.
67.321  Requirement to report change of address of managing owner.
67.323  Operation without documentation.
67.325  Violation of endorsement.
67.327  Operation under Certificate of Documentation with invalid 
          endorsement.
67.329  Unauthorized name change.
67.331  Improper markings.

                        Subparts V-X--[Reserved]

                             Subpart Y--Fees

67.500  Applicability.
67.501  Application for Certificate of Documentation.
67.503  Application for exchange or replacement of a Certificate of 
          Documentation.
67.505  Application for return of vessel to documentation.
67.507  Application for replacement of lost or mutilated Certificate of 
          Documentation.
67.509  Application for approval of exchange of Certificate of 
          Documentation requiring mortgagee consent.
67.511  Application for trade endorsement(s).
67.513  Application for evidence of deletion from documentation.
67.515  [Reserved]
67.517  Application for late renewal.
67.519  Application for waivers.
67.521  Application for new vessel determination.
67.523  Application for wrecked vessel determination.
67.525  Application for determination of rebuild.
67.527  Application for filing and recording bills of sale and 
          instruments in the nature of a bill of sale.
67.529  Application for filing and recording mortgages and related 
          instruments.
67.531  Application for filing and recording notices of claim of lien.
67.533  Application for Certificate of Compliance.
67.535  Issuance of Abstract of Title.
67.537  Issuance of Certificate of Ownership.
67.539  Copies of instruments and documents.
67.540  Facsimile handling fee.
67.550  Fee table.

    Authority: 14 U.S.C. 664; 31 U.S.C. 9701; 42 U.S.C. 9118; 46 U.S.C. 
2103, 2107, 2110; 46 U.S.C. app. 841a, 876; 49 CFR 1.45, 1.46.

    Source: CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, unless 
otherwise noted.



                           Subpart A--General



Sec. 67.1  Purpose.

    A Certificate of Documentation is required for the operation of a 
vessel in certain trades, serves as evidence of vessel nationality, and 
permits a vessel to be subject to preferred mortgages.



Sec. 67.3  Definitions.

    The following definitions are for terms used in this part.
    Acknowledgment means:
    (a) An acknowledgment or notarization in any form which is in 
substantial compliance with the Uniform Acknowledgments Act, the Uniform 
Recognition of Acknowledgments Act, the Uniform Law on Notarial Acts, or 
the statutes of the State within which it is taken, made before a notary 
public or other official authorized by a law of a State or the United 
States to take acknowledgment of deeds;
    (b) An acknowledgment or notarization before a notary or other 
official authorized to take acknowledgments of deeds by the law of a 
foreign nation which is a party to the Hague Convention Abolishing the 
Requirement for Legalisation of Public Documents, 1961, provided that 
the acknowledgment or notarization is accompanied by the certificate 
described in Article 3 of that Convention; or
    (c) Any attestation which is substantially in the following form:

State:
County:

    On [date] the person(s) named above acknowledged execution of the 
foregoing instrument in their stated capacity(ies) for the purpose 
therein contained.

Notary Public
My commission expires: [date]

    Captured vessel means a vessel which has been taken by citizens of 
the United States during a period of war and is thereafter condemned as 
a prize by a court of competent jurisdiction.
    Certification of Documentation means form CG-1270.
    Citizen, unless expressly provided otherwise, means a person meeting 
the applicable citizenship requirements of subpart C of this part as a 
United States citizen.

[[Page 331]]

    Coastwise trade includes the transportation of passengers or 
merchandise between points embraced within the coastwise laws of the 
United States.
    Commandant means the Commandant of the United States Coast Guard.
    Documentation officer means the Coast Guard official who is 
authorized to process and approve applications made under this part, and 
record instruments authorized to be filed and recorded under this part.
    Documented vessel means a vessel which is the subject of a valid 
Certificate of Documentation.
    Endorsement means an entry which may be made on a Certificate of 
Documentation, and which, except for a recreational endorsement, is 
conclusive evidence that a vessel is entitled to engage in a specified 
trade.

    Note: Rulings and interpretations concerning what activities 
constitute coastwise trade and the fisheries can be obtained from the 
U.S Customs Service, 1301 Constitution Avenue, NW., Washington, DC 20229 
(Attn: Carrier Rulings Branch).

    Exclusive Economic Zone (EEZ) means the zone established by 
Presidential Proclamation Numbered 5030, dated March 10, 1983 (48 FR 
10105, 3 CFR, 1983 Comp., p. 22).
    Fisheries includes processing, storing, transporting (except in 
foreign commerce), planting, cultivating, catching, taking, or 
harvesting fish, shellfish, marine animals, pearls, shells, or marine 
vegetation in the navigable waters of the United States or in the 
Exclusive Economic Zone.
    Forfeited vessel means a vessel:
    (1) Which has been adjudged forfeited by a Federal District Court to 
the Federal Government of the United States for a breach of its laws; or
    (2) Which has been forfeited under an administrative forfeiture 
action to the Federal Government of the United States for a breach of 
its laws; or
    (3) Which has been seized by the Federal Government of the United 
States for a breach of its laws and which has been sold at an 
interlocutory sale, the proceeds of which have been adjudged forfeited 
by a Federal District Court to the Federal Government of the United 
States. A vessel is considered forfeited within the meaning of this 
definition even if the proceeds, though adjudged forfeited to the United 
States, do not actually accrue to the United States.
    Hull means the shell, or outer casing, and internal structure below 
the main deck which provide both the flotation envelope and structural 
integrity of the vessel in its normal operations. In the case of a 
submersible vessel, the term includes all structural members of the 
pressure envelope.
    Manufacturer's Certificate of Origin means a certificate issued 
under the law or regulation of a State, evidencing transfer of a vessel 
from the manufacturer as defined in 33 CFR part 181 to another person.
    National Vessel Documentation Center means the organizational unit 
designated by the Commandant to process vessel documentation 
transactions and maintain vessel documentation records. The address is: 
National Vessel Documentation Center, 2039 Stonewall Jackson Drive, 
Falling Waters, WV 25419. Telephone: (800) 799-VDOC (8362).
    New vessel means a vessel:
    (1) The hull and superstructure of which are constructed entirely of 
new materials; or
    (2) Which is constructed using structural parts of an existing 
vessel, which parts have been torn down so that they are no longer 
advanced to a degree which would commit them to use in the building of a 
vessel.
    Officer in Charge, Marine Inspection (OCMI) means the Coast Guard 
official designated as such by the Commandant, under the superintendence 
and direction of a Coast Guard District Commander, who is in charge of 
an inspection zone in accordance with regulations set forth in 46 CFR 
part 1.
    Person means an individual, corporation, partnership, association, 
joint venture, trust arrangement, the government of the United States, a 
State or political subdivision thereof, and includes a trustee, 
beneficiary, receiver, or similar representative of any of them.
    Registration means a certificate of number issued pursuant to rules 
in 33 CFR part 173, a record under the maritime laws of a foreign 
country, or a certificate issued by a political subdivision of a foreign 
country.
    Secretary means the Secretary of Transportation.

[[Page 332]]

    State means a State of the United States or a political subdivision 
thereof, Guam, Puerto Rico, the Virgin Islands, American Samoa, the 
District of Columbia, the Northern Mariana Islands, and any other 
territory or possession of the United States.
    Superstructure means the main deck and any other structural part 
above the main deck.
    United States, when used in a geographic sense means the States of 
the United States, Guam, Puerto Rico, the Virgin Islands, American 
Samoa, the District of Columbia, the Northern Mariana Islands, and any 
other territory or possession of the United States, except that for 
purposes of Sec. 67.19(d)(3) trust territories are not considered to be 
part of the United States.
    Vessel includes every description of watercraft or other contrivance 
capable of being used as a means of transportation on water, but does 
not include aircraft.
    Wrecked vessel, under the provisions of 46 U.S.C. app. 14, means a 
vessel which:
    (1) Has incurred substantial damage to its hull or superstructure as 
a result of natural or accidental causes which occurred in the United 
States or its adjacent waters; and
    (2) Has undergone, in a shipyard in the United States or its 
possessions, repairs equaling three times the appraised salved value of 
the vessel.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
95-014, 60 FR 31603, June 15, 1995; CDG 94-070, 60 FR 40241, Aug. 7, 
1995; CGD 95-012, 60 FR 48050, Sept. 18, 1995]



Sec. 67.5  Vessels eligible for documentation.

    Any vessel of at least five net tons wholly owned by a citizen or 
citizens of the United States is eligible for documentation under this 
part. This includes, but is not limited to, vessels used exclusively for 
recreational purposes and vessels used in foreign trade.



Sec. 67.7  Vessels requiring documentation.

    Any vessel of at least five net tons which engages in the fisheries 
on the navigable waters of the United States or in the Exclusive 
Economic Zone, Great Lakes trade, or coastwise trade, unless exempt 
under Sec. 67.9(c), must have a Certificate of Documentation bearing a 
valid endorsement appropriate for the activity in which engaged.



Sec. 67.9  Vessels excluded from or exempt from documentation.

    (a) A vessel of less than five net tons is excluded from 
documentation.
    (b) A vessel which does not operate on the navigable waters of the 
United States or in the fisheries in the Exclusive Economic Zone is 
exempt from the requirement to have a Certificate of Documentation.
    (c) A non-self-propelled vessel, qualified to engage in the 
coastwise trade is exempt from the requirement to be documented with a 
coastwise endorsement when engaged in coastwise trade:
    (1) Within a harbor;
    (2) On the rivers or lakes (except the Great Lakes) of the United 
States; or
    (3) On the internal waters or canals of any State.
    (d) A vessel exempt from the requirement to be documented by 
paragraph (b) or (c) of this section may be documented at the option of 
the owner, provided it meets the other requirements of this part.



Sec. 67.11  Restriction on transfer of an interest in documented vessels to foreign persons; foreign registry or operation.

    (a) Unless approved by the Maritime Administration--
    (1) A documented vessel or a vessel last documented under the laws 
of the United States may not be placed under foreign registry or 
operated under the authority of a foreign country.
    (2) A documented vessel or a vessel last documented under the laws 
of the United States owned by a citizen of the United States as defined 
in section 2 of the Shipping Act, 1916 (46 U.S.C. app. 802), may not be 
sold, mortgaged, leased, chartered, delivered, or otherwise transferred 
to any person who is not a citizen of the United States as defined in 
section 2 of the Shipping Act, 1916 (46 U.S.C. app. 802).
    (b) The restrictions in paragraph (a)(2) of this section do not 
apply to a vessel that has been operated only as:

[[Page 333]]

    (1) A fishing vessel, fish processing vessel, or fish tender vessel 
as defined in 46 U.S.C. 2101;
    (2) A recreational vessel; or
    (3) Both.

    Note: For purposes of carrying out its responsibilities under the 
provisions of this part only, the Coast Guard will deem a vessel which 
has been documented exclusively with a fishery or recreational 
endorsement or both from the time it was first documented, or for a 
period of not less than one year prior to foreign transfer or registry, 
to qualify for the exemption granted in paragraph (b) of this section.



Sec. 67.12  Right of appeal.

    Any person directly affected by a decision or action taken under 
this part by or on behalf of the Coast Guard may appeal therefrom in 
accordance with subpart 1.03 of this chapter.



Sec. 67.13  Incorporation by reference.

    (a) Certain material is incorporated by reference into this part 
with the approval of the Director of the Federal Register under 5 U.S.C. 
552(a) and 1 CFR part 51. To enforce any edition other than that 
specified in paragraph (b) of this section, the Coast Guard must publish 
notice of change in the Federal Register and the material must be 
available to the public. All approved material may be inspected at the 
Office of the Federal Register, 800 North Capitol Street, NW., suite 
700, Washington, DC and at the U.S. Coast Guard, National Vessel 
Documentation Center, 2039 Stonewall Jackson Drive, Falling Waters, WV 
25419 and is available from the source indicated in paragraph (b) of 
this section.
    (b) The material approved for incorporation by reference in this 
part and the section affected is as follows:
U.S. Department of Commerce, National Technical Information Service, 
    Springfield, VA 22181
Federal Information Processing Standards Publication 55DC, Guideline: 
    Codes For Named Populated Places, Primary County Divisions, And 
    Other Locational Entities of the United States and Outlying Areas 
    (1987)--67.119

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
95-070, 60 FR 40241, Aug. 7, 1995]



Sec. 67.14  OMB control numbers assigned pursuant to the Paperwork Reduction Act.

    (a) Purpose. This section collects and displays the control numbers 
assigned to information collection and recordkeeping requirements in 
this subchapter by the Office of Management and Budget (OMB) pursuant to 
the Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.). The Coast 
Guard intends that this section comply with the requirements of 44 
U.S.C. 3507(f) which requires that agencies display a current control 
number assigned by the Director of the OMB for each approved agency 
information collection requirement.
    (b) Display.

------------------------------------------------------------------------
                                                             Current OMB
    46 CFR part or section where identified or described     control No.
------------------------------------------------------------------------
Part 67....................................................    2115-0110
Part 68....................................................    2115-0110
------------------------------------------------------------------------



 Subpart B--Forms of Documentation; Endorsements; Eligibility of Vessel



Sec. 67.15  Form of document--all endorsements.

    (a) The form of document is a Certificate of Documentation, form CG-
1270.
    (b) Upon application in accordance with subpart K of this part and 
determination of qualification by the Manager, National Vessel 
Documentation Center, a Certificate of Documentation may be issued with 
a registry, coastwise, Great Lakes, fishery, or recreational 
endorsement.
    (c) A Certificate of Documentation may bear simultaneous 
endorsements for recreation and more than one trade, including operation 
under 46 CFR part 68.

    Note: Where a vessel possesses a Certificate of Documentation 
bearing more than one endorsement, the actual use of the vessel 
determines the endorsement under which it is operating.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.17  Registry endorsement.

    (a) A registry endorsement entitles a vessel to employment in the 
foreign

[[Page 334]]

trade; trade with Guam, American Samoa, Wake, Midway, or Kingman Reef; 
and any other employment for which a coastwise, Great Lakes, or fishery 
endorsement is not required.
    (b) Any vessel eligible for documentation under Sec. 67.5 is 
eligible for a registry endorsement.
    (c) A vessel otherwise eligible for a registry endorsement for which 
the Maritime Administration has not given approval for unrestricted 
transfer pursuant to 46 CFR part 221 loses that eligibility during any 
period in which it is mortgaged to a person not identified in 
Sec. 67.233(b).



Sec. 67.19  Coastwise or Great Lakes endorsement.

    (a) A coastwise endorsement entitles a vessel to employment in 
unrestricted coastwise trade, dredging, towing, and any other employment 
for which a registry, fishery, or Great Lakes endorsement is not 
required.
    (b) A Great Lakes endorsement entitles a vessel to employment in the 
Great Lakes trade, towing in the Great Lakes, and any other employment 
for which a registry, fishery, or coastwise endorsement is not required.
    (c) If eligible for documentation and not restricted from coastwise 
or Great Lakes trade by paragraph (d) or (e) of this section, the 
following vessels are eligible for a coastwise or Great Lakes 
endorsement or both:
    (1) Vessels built in the United States (Sec. 67.97);
    (2) Forfeited vessels (Sec. 67.131);
    (3) Vessels granted coastwise trading privileges by special 
legislation (Sec. 67.132);
    (4) Wrecked vessels (Sec. 67.133);
    (5) Captured vessels (Sec. 67.134); and
    (6) Vessels purchased, chartered, or leased from the Secretary of 
Transportation by persons who are citizens of the United States (46 
U.S.C. app. 808).
    (d) A vessel otherwise eligible for a coastwise or Great Lakes 
endorsement under paragraph (c) of this section permanently loses that 
eligibility if:
    (1) It is thereafter sold in whole or in part to an owner:
    (i) Not a citizen as defined in subpart C of this part, or
    (ii) Not a person permitted to document vessels pursuant to 46 CFR 
part 68;
    (2) It is thereafter registered under the laws of a foreign country;
    (3) It undergoes rebuilding as defined in Sec. 67.177 outside of the 
United States; or
    (4) It is a crude oil tanker of 20,000 deadweight tons or above, and 
after October 17, 1978, has segregated ballast tanks, a crude oil 
washing system, or an inert gas system installed outside of the United 
States as defined in Sec. 67.3.
    (e) A vessel otherwise eligible for a coastwise or Great Lakes 
endorsement under paragraph (c) of this section loses that eligibility, 
except as provided in paragraph (f) of this section, during any period 
in which it is:
    (1) Owned by a corporation which does not meet the citizenship 
requirements of Sec. 67.39(b);
    (2) Owned by a partnership which does not meet the citizenship 
requirements of Sec. 67.35(a)(2); or
    (3) Mortgaged to a person not identified in Sec. 67.233(b).
    (f) The restriction imposed by paragraph (e)(2) of this section does 
not apply to any vessel for which the Maritime Administration has given 
approval for unrestricted transfer pursuant to regulations set forth in 
46 CFR part 221.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 94-008, 59 FR 49846, Sept. 30, 1994; CGD 94-
040, 61 FR 17815, Apr. 22, 1996]



Sec. 67.21  Fishery endorsement.

    (a) A fishery endorsement entitles a vessel to employment in the 
fisheries as defined in Sec. 67.3, subject to Federal and State laws 
regulating the fisheries, and in any other employment for which a 
registry, coastwise, or Great Lakes endorsement is not required. A 
fishery endorsement entitles a vessel to land its catch, wherever 
caught, in the United States.
    (b) If eligible for documentation and not restricted from the 
fisheries by paragraph (c) of this section, the following vessels are 
eligible for a fishery endorsement:
    (1) Vessels built in the United States (Sec. 67.97);
    (2) Forfeited vessels (Sec. 67.131);

[[Page 335]]

    (3) Vessels granted fisheries privileges by special 
legislation(Sec. 67.132);
    (4) Wrecked vessels (Sec. 67.133); and
    (5) Captured vessels (Sec. 67.134).
    (c) A vessel otherwise eligible for a fishery endorsement under 
paragraph (b) of this section permanently loses that eligibility if it 
undergoes rebuilding as defined in Sec. 67.177 outside of the United 
States.
    (d) A vessel otherwise eligible for a fishery endorsement under 
paragraph (b) of this section and not protected by the savings provision 
in Sec. 67.45, loses that eligibility during any period in which it is 
owned by a partnership which does not meet the requisite citizenship 
requirements of Sec. 67.35(a), or by a corporation which does not meet 
the citizenship requirements of Sec. 67.39(d).

[CGD 89-007, CGD 89-007A, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
94-040, 61 FR 17815, Apr. 22, 1996]



Sec. 67.23  Recreational endorsement.

    (a) A recreational endorsement entitles a vessel to pleasure use 
only.
    (b) Any vessel eligible for documentation under Sec. 67.5 is 
eligible for a recreational endorsement.

    Note: A vessel having a Certificate of Documentation endorsed only 
for recreation may be bareboat chartered only for recreational use. 
Guidance on the elements of a valid bareboat charter should be obtained 
through private legal counsel.



      Subpart C--Citizenship Requirements for Vessel Documentation



Sec. 67.30  Requirement for citizen owner.

    Certificates of Documentation may be issued under this part only to 
vessels which are wholly owned by United States citizens. Pursuant to 
extraordinary legislation at 46 U.S.C. app. 883-1 (Bowater Amendment) 
and 46 U.S.C. 12106(d) (Oil Pollution Act of 1990), Certificates of 
Documentation with limited endorsements may be issued in accordance with 
part 68 of this chapter to vessels owned by certain persons who are not 
citizens as defined in this part.



Sec. 67.31  Stock or equity interest requirements.

    (a) The stock or equity interest requirements for citizenship under 
this subpart encompass: Title to all classes of stock; title to voting 
stock; and ownership of equity. An otherwise qualifying corporation or 
partnership may fail to meet stock or equity interest requirements 
because: Stock is subject to trust or fiduciary obligations in favor of 
non-citizens; non-citizens exercise, directly or indirectly, voting 
power; or non-citizens, by any means, exercise control over the entity. 
The applicable stock or equity interest requirement is not met if the 
amount of stock subject to obligations in favor of non-citizens, non-
citizen voting power, or non-citizen control exceeds the percentage of 
the non-citizen interest permitted.
    (b) For the purpose of this section, control includes an absolute 
right to: Direct corporate or partnership business; limit the actions of 
or replace the chief executive officer, a majority of the board of 
directors, or any general partner; direct the transfer or operations of 
any vessel owned by the corporation or partnership; or otherwise 
exercise authority over the business of the corporation or partnership. 
Control does not include the right to simply participate in these 
activities or the right to receive a financial return, e.g., interest or 
the equivalent of interest on a loan or other financing obligations.
    (c) For purposes of meeting the stock or equity interest 
requirements for citizenship under this subpart where title to a vessel 
is held by an entity comprised, in whole or in part, of other entities 
which are not individuals, each entity contributing to the stock or 
equity interest qualifications of the entity holding title must be a 
citizen eligible to document vessels in its own right with the trade 
endorsement sought.



Sec. 67.33  Individual.

    An individual is a citizen if native-born, naturalized, or a 
derivative citizen of the United States, or otherwise qualifies as a 
United States citizen.

[[Page 336]]



Sec. 67.35  Partnership.

    A partnership is a citizen if all its general partners are citizens, 
and:
    (a) For the purpose of obtaining a registry or recreational 
endorsement, at least 50 percent of the equity interest in the 
partnership is owned by citizens.
    (b) For the purpose of obtaining a fishery endorsement, more than 50 
percent of the equity interest in the partnership is owned by citizens.
    (c) For the purpose of obtaining a coastwise or Great Lakes 
endorsement or both, at least 75 percent of the equity interest in the 
partnership is owned by citizens.

[CGD 94-008, 59 FR 49846, Sept. 30, 1994]



Sec. 67.36  Trust.

    (a) For the purpose of obtaining a registry or recreational 
endorsement, a trust arrangement is a citizen if:
    (1) Each of its trustees is a citizen; and
    (2) Each beneficiary with an enforceable interest in the trust is a 
citizen.
    (b) For the purpose of obtaining a fishery endorsement, a trust 
arrangement is a citizen if:
    (1) It meets all the requirements of paragraph (a) of this section; 
and
    (2) More than 50 percent of the equity interest in the trust is 
owned by citizens.
    (c) For the purpose of obtaining a coastwise or Great Lakes 
endorsement or both, a trust arrangement is a citizen if:
    (1) It meets all the requirements of paragraph (a) of this section; 
and
    (2) At least 75 percent of the equity interest in the trust is owned 
by citizens.

[CGD 94-008, 59 FR 49846, Sept. 30, 1994]



Sec. 67.37  Association or joint venture.

    (a) An association is a citizen if each of its members is a citizen.
    (b) A joint venture is a citizen if each of its members is a 
citizen.

[CGD 94-008, 59 FR 49846, Sept. 30, 1994]



Sec. 67.39  Corporation.

    (a) For the purpose of obtaining a registry or a recreational 
endorsement, a corporation is a citizen if:
    (1) It is incorporated under the laws of the United States or of a 
State;
    (2) Its chief executive officer, by whatever title, is a citizen;
    (3) Its chairman of the board of directors is a citizen; and
    (4) No more of its directors are non-citizens than a minority of the 
number necessary to constitute a quorum.
    (b) For the purpose of obtaining a fishery endorsement, a 
corporation is a citizen if:
    (1) It meets all the requirements of paragraph (a) of this section; 
and
    (2) More than 50 percent of the stock interest in the corporation 
including a majority of voting shares in the corporation is owned by 
citizens.
    (c) For the purpose of obtaining a coastwise or Great Lakes 
endorsement or both, a corporation is a citizen if:
    (1) It meets all the requirements of paragraph (a) of this section; 
and
    (2) At least 75 percent of the stock interest in the corporation is 
owned by citizens.
    (d) A corporation which does not meet the stock interest requirement 
of paragraph (c) of this section may qualify for limited coastwise 
trading privileges by meeting the requirements of part 68 of this 
chapter.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
94-008, 59 FR 49847, Sept. 30, 1994]



Sec. 67.41  Governmental entity.

    A governmental entity is a citizen for the purpose of obtaining a 
vessel document if it is an entity of the Federal Government of the 
United States or of the government of a State as defined in Sec. 67.3.



Sec. 67.43  Evidence of citizenship.

    When received by the Coast Guard, a properly completed original 
Application for Initial Issue, Exchange, or Replacement of Certificate 
of Documentation; or Redocumentation (form CG-1258) establishes a 
rebuttable presumption that the applicant is a United States citizen.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993]

[[Page 337]]



Sec. 67.45  Citizenship savings provision for fishing vessels.

    An otherwise qualifying partnership or corporation that does not 
meet the requisite stock interest requirements for a fishery endorsement 
of Secs. 67.35 or 67.39, respectively, may be eligible to obtain a 
fishery endorsement for a vessel if, based on evidence submitted by the 
owner, it is determined that prior to July 28, 1987, the vessel:
    (a) Was documented under 46 U.S.C. Chapter 121 and operating as a 
fishing, fish processing, or fish tender vessel in the navigable waters 
of the United States or the Exclusive Economic Zone; or
    (b) Was contracted for purchase for use as a fishing, fish 
processing, or fish tender vessel in the navigable waters of the United 
States or the Exclusive Economic Zone, if the purchase is shown by the 
contract or similarly reliable evidence acceptable to the Secretary or 
the Secretary's delegate to have been made for the purpose of using the 
vessel in the fisheries.



Sec. 67.47  Requirement for Maritime Administration approval.

    (a) The following transactions, among others, require approval of 
the Maritime Administration in accordance with 46 CFR part 221:
    (1) Placement of the vessel under foreign registry;
    (2) Operation of the vessel under the authority of a foreign 
country; and
    (3) Sale or transfer of an interest in or control of the vessel from 
a citizen, as defined in section 2 of the Shipping Act, 1916 (46 U.S.C. 
app. 802), to a person not a citizen within the meaning of section 2 of 
that act.
    (b) A Certificate of Documentation may not be issued for a vessel 
which subsequent to the last issuance of a Certificate of Documentation 
has undergone any transaction listed in paragraph (a) of this section, 
even if the owner meets the citizenship requirements of this subpart, 
unless evidence is provided that the Maritime Administration approved 
the transaction.
    (c) The restriction imposed by paragraph (b) of this section does 
not apply to a vessel identified in Sec. 67.11(b).



         Subpart D--Title Requirements for Vessel Documentation



Sec. 67.50  Requirement for title evidence.

    The owner of a vessel must present title evidence in accordance with 
one of the methods specified in this subpart:
    (a) When application is made for a coastwise or a Great Lakes 
endorsement for a vessel which has not previously been qualified for 
such endorsement;
    (b) For initial documentation of a vessel;
    (c) When the ownership of a documented vessel changes in whole or in 
part;
    (d) When the general partners of a partnership owning a documented 
vessel change by addition, deletion, or substitution, without 
dissolution of the partnership; or
    (e) When a vessel which has been deleted from documentation is 
returned to documentation and there has been an intervening change in 
ownership.



Sec. 67.53  Methods of establishing title.

    Title to a vessel may be established through one of the following 
methods:
    (a) Simplified method without evidence of build. The owner must 
produce a copy of the last registration of the vessel (State, Federal, 
or foreign) and evidence which establishes chain of title from that 
registration to the present owner.
    (b) Simplified method with evidence of build. The owner must produce 
a copy of the last registration of the vessel (State, Federal, or 
foreign) and evidence which establishes chain of title from that 
registration to the present owner along with evidence of the facts of 
build in accordance with subpart F of this part.
    (c) Complete chain of title, without evidence of citizenship for 
each entity in that chain of title. The owner must provide evidence 
which establishes:
    (1) The facts of build in accordance with subpart F of this part; 
and
    (2) A complete chain of title for the vessel from the person for 
whom the vessel was built to the present owner.
    (d) Complete chain of title, with evidence of citizenship for each 
entity in that

[[Page 338]]

chain of title. The owner must provide evidence which establishes:
    (1) The facts of build in accordance with subpart F of this part; 
and
    (2) A complete chain of title for the vessel from the person for 
whom the vessel was built to the present owner, accompanied by competent 
and persuasive evidence establishing the citizenship of each entity in 
the chain of title.



Sec. 67.55  Requirement for removal from foreign registry.

    The owner of a vessel must present evidence of removal of the vessel 
from foreign registry whenever:
    (a) The owner applies for initial documentation of a vessel that has 
at any time been registered under the laws of a foreign country; or
    (b) The owner applies for reentry into documentation of a vessel 
that had been registered under the laws of a foreign country since it 
was last documented under the laws of the United States.



Sec. 67.57  Extent of title evidence required for initial documentation.

    (a) Vessels never registered under any system:
    (1) Where a coastwise or Great Lakes endorsement is sought, the only 
title evidence required for a vessel being documented by the owner for 
whom it was built is the certification of the builder (form CG-1261) 
described in Sec. 67.99. Any other applicant must present title evidence 
in accordance with Sec. 67.53(d).
    (2) Where a fishery endorsement is sought, the only title evidence 
required for a vessel being documented by the owner for whom it was 
built is the certification of the builder (form CG-1261) described in 
Sec. 67.99. Any other applicant must present title evidence in 
accordance with either paragraph (c) or (d) of Sec. 67.53.
    (3) Where a registry or recreational endorsement is sought, the only 
title evidence required for a vessel being documented by the first owner 
of the vessel is the certification of the builder (form CG-1261) 
described in Sec. 67.99, or a Manufacturer's Certificate of Origin. Any 
other applicant must also present title evidence in accordance with 
either paragraph (c)(2) or (d)(2) of Sec. 67.53.

    Note: Manufacturer's Certificates of Origin are sometimes used as 
shipping documents for vessels, and may recite as the first owner a 
person other than the person for which the vessel was built. Therefore, 
a chain of title which begins with a Certificate of Origin will be 
deemed incomplete.

    (b) Vessels previously registered under the laws of a State or a 
foreign government:
    (1) Where a coastwise or a Great Lakes endorsement is sought, title 
evidence must be presented in accordance with Sec. 67.53(d).
    (2) Where a fishery endorsement is sought, title evidence must be 
presented in accordance with paragraph (b), (c), or (d) of Sec. 67.53.
    (3) Where a registry or recreational endorsement is sought, title 
evidence must be presented in accordance with paragraph (a), (b), (c), 
or (d) of Sec. 67.53.



Sec. 67.59  Extent of title evidence required for change in ownership of a documented vessel.

    When the ownership of a documented vessel changes, in whole or in 
part, the applicant for documentation must present:
    (a) Title evidence in accordance with subpart E of this part to 
reflect all ownership changes subsequent to the last issuance of a 
Certificate of Documentation; and
    (b) Where a registry, fishery, or recreational endorsement is 
sought, evidence of the citizenship of all owners subsequent to the last 
owner for whom the vessel was documented except for a vessel:
    (1) Identified in Sec. 67.11(b); or
    (2) For which the Maritime Administration has granted approval for 
transfer or sale under 46 CFR part 221.
    (c) Where a coastwise or Great Lakes endorsement is sought, evidence 
establishing the citizenship of all owners subsequent to the last owner 
for whom the vessel was documented with a coastwise or Great Lakes 
endorsement, if such evidence is not already on file with the Coast 
Guard. If the vessel has never been documented with a coastwise or Great 
Lakes endorsement, evidence must be presented to establish the 
citizenship of each owner of the vessel for whom such evidence is not 
already on file with the Coast Guard.

[[Page 339]]



Sec. 67.61  Extent of title evidence required for vessels returning to documentation.

    (a) When the owner of a vessel which has been deleted from 
documentation applies to have the vessel returned to documentation, the 
owner must, except as provided in paragraphs (b) and (c) of this 
section, provide evidence establishing the complete chain of title from 
the last owner under documentation, and citizenship evidence for all 
owners in that chain of title.
    (b) When a vessel is returned to documentation after having been 
under foreign registry, the owner must provide a copy of the last 
foreign registry, the evidence of removal from foreign registry required 
by Sec. 67.55, and evidence establishing the complete chain of title 
from the last owner under foreign registry. No citizenship evidence need 
be provided for owners in that chain of title.
    (c) The owner of a vessel identified in Sec. 67.11(b) or for which 
the Maritime Administration has granted approval for transfer or sale, 
either by written order or by general approval in 46 CFR part 221, and 
which was under a State or Federal registration or titling system, must 
provide a copy of the last registration or title, the evidence of 
removal from foreign registry required by Sec. 67.55, if applicable, and 
evidence establishing the complete chain of title from the last owner 
under such registry or title. No citizenship evidence need be provided 
for owners in that chain of title.

    Note: Although vessels returned to documentation without a complete 
chain of title are not eligible for coastwise or Great Lakes 
endorsements, this does not preclude such an endorsement if the chain of 
title, with citizenship evidence, is completed at a later date.



Sec. 67.63  Extent of title evidence required for captured, forfeited, special legislation, and wrecked vessels.

    (a) In the case of a captured or forfeited vessel, the owner must 
provide evidence establishing the chain of title from the judicial 
decree of capture or decree of forfeiture, or the evidence of 
administrative forfeiture described in Sec. 67.131(b). Citizenship 
evidence for all owners in the chain of title is required only if a 
coastwise or Great Lakes endorsement is sought.
    (b) In the case of a vessel which is the subject of special 
legislation or a wrecked vessel, the owner must provide:
    (1) For initial documentation of a vessel or return to documentation 
of a vessel deleted from documentation, a copy of the last Federal, 
State, or foreign registration, the evidence of removal from foreign 
registry required by Sec. 67.55, if applicable, and evidence 
establishing the chain of title from the last registration. If a 
coastwise or Great Lakes endorsement is sought, the owner must present 
citizenship evidence for all owners in the chain of title from the grant 
of special legislation or the determination by the Manager, National 
Vessel Documentation Center that the vessel is eligible for 
documentation under 46 U.S.C. app. 14.
    (2) For a documented vessel, the title evidence reflecting all 
ownership changes subsequent to the last documented owner of record. In 
addition, unless the vessel qualifies for exemption under Sec. 67.11(b) 
or the vessel is the subject of Maritime Administration approval for 
unrestricted transfer, citizenship evidence must be presented for all 
owners in that chain of title.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



              Subpart E--Acceptable Title Evidence; Waiver



Sec. 67.70  Original owner.

    The builder's certification described in Sec. 67.99 serves as 
evidence of the original owner's title to a vessel.



Sec. 67.73  Transfers prior to documentation.

    A transfer of vessel title prior to documentation may be evidenced 
by:
    (a) Completion of the transfer information on the reverse of the 
builder's certification on form CG-1261;
    (b) Completion of the transfer information on the reverse of the 
Manufacturer's Certificate of Origin; or
    (c) A bill of sale which meets the criteria for filing and recording 
set forth in subpart P of this part.

[[Page 340]]



Sec. 67.75  Transfers by sale or donation subsequent to documentation.

    (a) Except as otherwise provided in this subpart, transfers of 
vessel title must be evidenced by a bill of sale which meets the 
criteria for filing and recording set forth in subpart P of this part. 
Except as otherwise provided in subpart O of this part, each bill of 
sale must be accompanied by a declaration of citizenship from the new 
owner, executed on the appropriate Maritime Administration form 
described in Sec. 67.211.
    (b) The bill of sale form used may be form CG-1340 or form CG-1356, 
as appropriate.
    (c) An applicant for documentation who cannot produce required title 
evidence in the form of an instrument eligible for filing and recording 
in accordance with subpart P of this part may apply for a waiver of that 
requirement in accordance with the provisions of Sec. 67.89.



Sec. 67.77  Passage of title by court action.

    (a) When title to a vessel has passed by court action, that passage 
must be established by copies of the relevant court order(s) certified 
by an official of the court.
    (b) When authority to transfer a vessel has been conferred by court 
action, that authority must be established by copies of the relevant 
court order(s) certified by an official of the court.



Sec. 67.79  Passage of title without court action following death of owner.

    (a) When title to a vessel formerly owned in whole or in part by an 
individual now deceased passes without court action, an applicant for 
documentation must present:
    (1) When title passes to a surviving joint tenant or tenants or to a 
tenant by the entirety, a copy of the death certificate, certified by an 
appropriate State official; or
    (2) Where the laws of cognizant jurisdiction permit passage of title 
without court action, evidence of compliance with applicable State law.
    (b) Passage of title subsequent to devolutions such as those 
described in paragraph (a) of this section, must be established in 
accordance with the remainder of this subpart.



Sec. 67.81  Passage of title in conjunction with a corporate merger or similar transaction.

    When the title to a vessel has passed as the result of a corporate 
merger or similar transaction wherein the assets of one corporation have 
been transferred to another, the passage of title must be established 
by:
    (a) Materials, such as a resolution of the board of directors or 
shareholders of the corporation which held title to the vessel before 
the transaction, which either unequivocally transfers all of the assets 
of the corporation or which specifically identifies the vessel as being 
among the assets transferred; and
    (b) In jurisdictions where there is an official recognition of 
corporate mergers and similar transactions, a copy of such official 
recognition certified by the cognizant official of that jurisdiction.



Sec. 67.83  Passage of title by extra-judicial repossession and sale.

    When title to a documented vessel has passed by reason of an extra-
judicial repossession and sale, such passage must be established by:
    (a) A copy of the instrument under which foreclosure was made;
    (b) An affidavit from the foreclosing party setting forth the 
reasons for foreclosure, the chronology of foreclosure, the statute(s) 
under which foreclosure was made, and the steps taken to comply with the 
relevant instrument and statute(s);
    (c) Evidence of substantial compliance with the relevant instrument 
and statute(s); and
    (d) A bill of sale which meets the criteria for filing and recording 
set forth in subpart P of this part from the foreclosing party as agent 
for the defaulting owner(s).



Sec. 67.85  Change in general partners of partnership.

    When the general partners of a partnership owning a documented 
vessel change by addition, deletion, or substitution without dissolution 
of the partnership, the change must be established by a written 
statement from a surviving general partner detailing the nature of the 
change.

[[Page 341]]



Sec. 67.87  Change of legal name of owner.

    (a) When the name of a corporation which owns a documented vessel 
changes, the corporation must present certification from the appropriate 
governmental agency evidencing registration of the name change.
    (b) When the name of an individual who owns a documented vessel 
changes for any reason, competent and persuasive evidence establishing 
the change must be provided.



Sec. 67.89  Waiver of production of a bill of sale eligible for filing and recording.

    (a) When the evidence of title passage required by this subpart is a 
bill of sale which meets the criteria for filing and recording set forth 
in subpart P of this part, and the applicant is unable to produce a bill 
of sale meeting those criteria, the applicant may request that the 
Manager, National Vessel Documentation Center waive that requirement.
    (b) No waiver of the requirement to produce a bill of sale eligible 
for filing and recording may be granted unless the applicant provides:
    (1) A written statement detailing the reasons why an instrument 
meeting the filing and recording criteria of this part cannot be 
obtained; and
    (2) Competent and persuasive evidence of the passage of title.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.91  Passage of title pursuant to operation of State law.

    When title to a documented vessel has passed by operation of State 
law for reasons other than those specified in this subpart, such passage 
must be established by:
    (a) A copy of the statute permitting transfer of title to the vessel 
and setting forth procedures to be followed in disposing of the vessel;
    (b) An affidavit from the party acting against the vessel, setting 
forth the basis for selling the vessel, and the steps taken to comply 
with the requirements of the statute under which title passes;
    (c) Evidence of substantial compliance with the relevant statute(s); 
and
    (d) A bill of sale which meets the criteria for filing and recording 
set forth in subpart P of this part from the acting party as agent for 
the owner(s) of record.


    Note: State law authorizing a marina to dispose of abandoned vessels 
is an example of passage of title by operation of law contemplated by 
Sec. 67.91.



         Subpart F--Build Requirements for Vessel Documentation



Sec. 67.95  Requirement for determination.

    Evidence that a vessel was built in the United States must be on 
file for any vessel for which a coastwise, Great Lakes, or fishery 
endorsement is sought, unless the vessel is otherwise qualified for 
those endorsements under subpart J of this part.



Sec. 67.97  United States built.

    To be considered built in the United States a vessel must meet both 
of the following criteria:
    (a) All major components of its hull and superstructure are 
fabricated in the United States; and
    (b) The vessel is assembled entirely in the United States.



Sec. 67.99  Evidence of build.

    (a) Evidence of the facts of build may be either a completed 
original form CG-1261, or other original document containing the same 
information, executed by a person having personal knowledge of the facts 
of build because that person:
    (1) Constructed the vessel;
    (2) Supervised the actual construction of the vessel; or
    (3) Is an officer or employee of the company which built the vessel 
and has examined the records of the company concerning the facts of 
build of the vessel.
    (b) A vessel owner applying for documentation must file a separate 
certificate from each builder involved in the construction of the 
vessel.
    (c) A Manufacturer's Certificate of Origin is not evidence of the 
facts of build.

[[Page 342]]



Sec. 67.101  Waiver of evidence of build.

    (a) A vessel owner applying for documentation unable to obtain the 
evidence of build required by Sec. 67.99 may apply for a waiver of that 
requirement to the Manager, National Vessel Documentation Center.
    (b) No waiver of the requirement in Sec. 67.99 to produce evidence 
of build may be granted unless the applicant provides:
    (1) A written request for the waiver, explaining why the evidence 
required by Sec. 67.99 cannot be furnished; and
    (2) Competent and persuasive evidence of the facts of build.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



 Subpart G--Tonnage and Dimension Requirements for Vessel Documentation



Sec. 67.105  Requirement for determination.

    The gross and net tonnage and dimensions of a vessel must be 
determined:
    (a) For initial documentation;
    (b) Whenever there is a change in the gross or net tonnage or 
dimensions of a documented vessel; or
    (c) When the gross or net tonnage of a vessel returning to 
documentation has changed since the vessel was last documented.



Sec. 67.107  System of measurement; evidence.

    (a) The gross and net tonnage and dimensions of a vessel for 
purposes of this part are determined in accordance with 46 CFR part 69.
    (b) A Certificate of Measurement issued by an authorized official is 
the only acceptable evidence of the gross and net tonnage of a vessel 
measured in accordance with subpart B, C, or D of 46 CFR part 69. A 
Certificate of Measurement is not issued for vessels measured under 
subpart E of 46 CFR part 69 since the gross and net tonnage are 
determined as part of the documentation process.



      Subpart H--Assignments and Designations Required for Vessel 
                              Documentation



Sec. 67.111  Assignment of official number.

    (a) The owner of a vessel must submit an Application for Initial 
Issue, Exchange, or Replacement of Certificate of Documentation; or 
Redocumentation (form CG-1258) to the Manager, National Vessel 
Documentation Center, to apply for an official number for the vessel 
when:
    (1) Application is made for initial documentation of the vessel; or
    (2) An existing vessel has been severed, with two or more vessels 
resulting. In this case, the official number of the original vessel is 
retired and the owner of each resulting vessel must apply for 
designation of a new official number.
    (b) Upon receipt of form CG-1258, the Manager, National Vessel 
Documentation Center will have an official number assigned to the vessel 
and furnish it to the vessel owner.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.113  Managing owner designation; address; requirement to report change of address.

    The owner of each vessel must designate a managing owner on the 
Application for Initial Issue, Exchange, or Replacement of Certificate 
of Documentation; or Redocumentation (CG-1258).
    (a) The managing owner of a vessel owned by one person is the owner 
of the vessel.
    (b) The managing owner of a vessel owned by more than one person 
must be one of the owners. The person designated as managing owner must 
have an address in the United States except where no owner of the vessel 
has an address in the United States.
    (c) The managing owner of a vessel owned in a trust arrangement must 
be one of the trustees.
    (d) The address of the managing owner must be as follows:
    (1) For an individual, any residence of the managing owner.
    (2) For a partnership, its address:

[[Page 343]]

    (i) In the State under whose laws it is organized; or
    (ii) Of its principal place of business.
    (3) For a corporation, its address:
    (i) For service of process within the State of incorporation; or
    (ii) Of its principal place of business.
    (e) Whenever the address of the managing owner changes, the managing 
owner shall notify the Manager, National Vessel Documentation Center 
within 10 days.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.117  Vessel name designation.

    (a) The owner of a vessel must designate a name for the vessel on 
the Application for Initial Issue, Exchange, or Replacement of 
Certificate of Documentation; or Redocumentation (form CG-1258) 
submitted to the Manager, National Vessel Documentation Center:
    (1) Upon application for initial documentation of the vessel; or
    (2) When the owner elects to change the name of the vessel.
    (b) The name designated:
    (1) Must be composed of letters of the Latin alphabet or Arabic or 
Roman numerals;
    (2) May not be identical, actually or phonetically, to any word or 
words used to solicit assistance at sea; and
    (3) May not contain nor be phonetically identical to obscene, 
indecent, or profane language, or to racial or ethnic epithets.
    (c) The name of a documented vessel may not be changed without the 
prior approval of the Manager, National Vessel Documentation Center.
    (d) Until such time as the owner of a vessel elects to change the 
name of a vessel, the provisions of paragraph (b) of this section do not 
apply to vessels validly documented before January 1, 1994.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.119  Hailing port designation.

    (a) Upon application for any Certificate of Documentation in 
accordance with subpart K of this part, the owner of a vessel must 
designate a hailing port to be marked upon the vessel.
    (b) The hailing port must be a place in the United States included 
in the U.S. Department of Commerce's Federal Information Processing 
Standards Publication 55DC.
    (c) The hailing port must include the State, territory, or 
possession in which it is located.
    (d) The Manager, National Vessel Documentation Center has final 
authority to settle disputes as to the propriety of the hailing port 
designated.
    (e) Until such time as the vessel owner elects to designate a new 
hailing port, the provisions of paragraph (c) of this section do not 
apply to vessels which were issued a Certificate of Documentation before 
July 1, 1982.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
95-014, 60 FR 31604, June 15, 1995]



        Subpart I--Marking Requirements for Vessel Documentation



Sec. 67.120  General requirement.

    No Certificate of Documentation issued under this part will be 
deemed valid for operation of the vessel until the vessel is marked in 
accordance with this subpart.



Sec. 67.121  Official number marking requirement.

    The official number of the vessel, preceded by the abbreviation 
``NO.'' must be marked in block-type Arabic numerals not less than three 
inches in height on some clearly visible interior structural part of the 
hull. The number must be permanently affixed to the vessel so that 
alteration, removal, or replacement would be obvious. If the official 
number is on a separate plate, the plate must be fastened in such a 
manner that its removal would normally cause some scarring of or damage 
to the surrounding hull area.



Sec. 67.123  Name and hailing port marking requirements.

    (a) For vessels other than those covered in paragraphs (b) and (c) 
of this section, the name of the vessel must be marked on some clearly 
visible exterior part of the port and starboard bow and the stern of the 
vessel. The hailing

[[Page 344]]

port of the vessel must be marked on some clearly visible exterior part 
of the stern of the vessel.
    (b) Vessels with square bow. For vessels having a square bow, the 
name of the vessel must be marked on some clearly visible exterior part 
of the bow in a manner to avoid obliteration. The name and hailing port 
must be marked on some clearly visible exterior part of the stern.
    (c) Recreational vessels. For vessels documented exclusively for 
recreation, the name and hailing port must be marked together on some 
clearly visible exterior part of the hull.
    (d) The markings required by paragraphs (a), (b), and (c) of this 
section, which may be made by the use of any means and materials which 
result in durable markings, must be made in clearly legible letters of 
the Latin alphabet or Arabic or Roman numerals not less than four inches 
in height.



Sec. 67.125  Disputes.

    The OCMI for the zone in which the vessel is principally operated 
has final authority in any disputes concerning the permanence, 
durability, legibility, or placement of a vessel's markings.



      Subpart J--Application for Special Qualifications for Vessel 
                              Documentation



Sec. 67.130  Submission of applications.

    All applications made under this subpart and all subsequent filings 
to effect documentation, except as provided in Sec. 67.133(b), must be 
submitted to the National Vessel Documentation Center.

[CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.131  Forfeited vessels.

    In addition to any other submissions required by this part, the 
owner of a forfeited vessel applying for a Certificate of Documentation 
for that vessel must submit the following:
    (a) Where the vessel has been adjudged forfeit, or the proceeds of 
the sale of the vessel have been adjudged forfeit to the Federal 
Government of the United States by a Federal District Court, a copy of 
the court order certified by an official of the court;
    (b) Where the vessel was forfeited to the Federal Government of the 
United States under an administrative forfeiture action, an affidavit 
from an officer of the agency which performed the forfeiture who has 
personal knowledge of the particulars of the vessel's forfeiture or a 
Declaration of Forfeiture issued by the agency which performed the 
forfeiture.



Sec. 67.132  Special legislation.

    (a) Vessels not otherwise entitled to be operated in the coastwise 
trade, Great Lakes trade, or in the fisheries may obtain these 
privileges as a result of special legislation by the Congress of the 
United States.
    (b) In addition to any other submissions required by this part, the 
owner of a vessel which is entitled to engage in a specified trade 
because it is the subject of special legislation must include a copy of 
the legislation to establish the entitlement.



Sec. 67.133  Wrecked vessels.

    (a) A vessel owner requesting a determination that the vessel is 
wrecked within the meaning of 46 U.S.C. app. 14 must submit the 
following to the Manager, National Vessel Documentation Center:
    (1) Competent and persuasive evidence of the occasion and location 
of the casualty. Coast Guard situation or investigation reports are 
acceptable as casualty evidence. Other competent and persuasive evidence 
may be accepted in the discretion of the Manager, National Vessel 
Documentation Center.
    (2) A writing setting forth the physical location of the vessel, 
containing a guarantee that the requesting party assumes full 
responsibility for all costs, liabilities, and other expenses that arise 
in conjunction with the services performed by the board of appraisers, 
and stating that at the time of documentation the vessel will be owned 
by a citizen of the United States.
    (b) In addition to other submissions required by this part, a vessel 
owner applying for a Certificate of Documentation for a vessel accorded 
privileges by the Wrecked Vessel Statute (46 U.S.C. app. 14) must 
include a copy of

[[Page 345]]

the determination of the Manager, National Vessel Documentation Center 
that the vessel qualifies for documentation under the statute.

    Note: The determination of the appraised salved value must be made 
by a board of three appraisers appointed by the Manager, National Vessel 
Documentation Center. The board must determine that the repairs made 
upon the vessel are equal to three times the appraised salvage value. 
The determination of the appraised salvage value will include 
consideration of the fact that if the vessel is found in compliance with 
the Wrecked Vessel Statute it will attain coastwise and fishery 
privileges. The cost of the board must be borne by the applicant.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.134  Captured vessels.

    In addition to other submissions required by this part, a vessel 
owner applying for a Certificate of Documentation for a vessel which 
qualifies as a captured vessel must include a copy of the court order 
stating that the vessel was lawfully captured and condemned as a prize.



  Subpart K--Application for Documentation, Exchange or Replacement of 
  Certificate of Documentation, or Return to Documentation; Mortgagee 
                           Consent; Validation



Sec. 67.141  Application procedure; all cases.

    The owner of a vessel applying for an initial Certificate of 
Documentation, exchange or replacement of a Certificate of 
Documentation, or return of a vessel to documentation after deletion 
from documentation must:
    (a) Submit the following to the National Vessel Documentation 
Center:
    (1) Application for Initial Issue, Exchange, or Replacement of 
Certificate of Documentation; or Redocumentation (form CG-1258);
    (2) Title evidence, if applicable;
    (3) Mortgagee consent on form CG-4593, if applicable; and
    (4) If the application is for replacement of a mutilated document or 
exchange of documentation, the outstanding Certificate of Documentation.
    (b) Upon receipt of the Certificate of Documentation and prior to 
operation of the vessel, ensure that the vessel is marked in accordance 
with the requirements set forth in subpart I of this part.

    Note: Issuance of endorsements on a Certificate of Documentation may 
be denied if the vessel owner is the subject of an outstanding civil 
penalty assessed by the Coast Guard.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.143  Restriction on withdrawal of application.

    A vessel owner making application pursuant to Sec. 67.141 may not 
withdraw that application without mortgagee consent if a mortgage has 
been filed against the vessel. Consent of the mortgagee is evidenced by 
filing a properly completed original Application, Consent, and Approval 
for Withdrawal of Application for Documentation or Exchange of 
Certificate of Documentation (form CG-4593).

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993]



Sec. 67.145  Restrictions on exchange; requirement and procedure for mortgagee consent.

    (a) A Certificate of Documentation issued to a vessel which is the 
subject of an outstanding mortgage recorded pursuant to subpart Q of 
this part or predecessor regulations, may not be exchanged for a cause 
arising under Secs. 67.167(b) (1) through (5) or 67.167(c) (1) through 
(8) without the consent of the mortgagee, except as provided in 
paragraph (b) of this section.
    (b) The provisions of paragraph (a) of this section do not apply to 
a vessel which is subject only to a mortgage filed or recorded before 
January 1, 1989, which had not attained preferred status as of that 
date.
    (c) When the owner of a vessel applies for a Certificate of 
Documentation and the consent of the mortgagee is required under 
paragraph (a) of this section, the applicant must submit a properly 
completed original Application, Consent, and Approval for Withdrawal of 
Application for Documentation or

[[Page 346]]

Exchange of Certificate of Documentation (form CG-4593) signed by or on 
behalf of the mortgagee to the National Vessel Documentation Center.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
94-008, 59 FR 49847, Sept. 30, 1994; CGD 95-014, 60 FR 31604, June 15, 
1995]



Sec. 67.149  Exchange of Certificate of Documentation; vessel at sea.

    (a) When exchange of a Certificate of Documentation issued to a 
vessel is required pursuant to subpart L of this part and the vessel is 
at sea, the owner may affect the exchange while the vessel is still at 
sea by:
    (1) Complying with the requirements of Sec. 67.141; and
    (2) complying with the requirements of Sec. 67.145, if applicable.

    Note: A Certificate of Documentation is issued upon compliance with 
the applicable requirements, however, the requirement to mark the vessel 
with its new name or hailing port in accordance with subpart I of this 
part, if applicable, is waived until the vessel reaches its first port 
of call, wherever that may be.

    (b) The documentation officer prepares a new Certificate of 
Documentation and forwards it for delivery to the vessel's next port of 
call. If the port of call is in the United States, the Certificate is 
forwarded to the nearest U.S. Coast Guard Marine Safety Office. If the 
port of call is in a foreign country, the Certificate is forwarded to 
the nearest American Consulate. The new Certificate is delivered only 
upon surrender of the old Certificate, which is then forwarded to the 
National Vessel Documentation Center.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
95-014, 60 FR 31604, June 15, 1995]



Sec. 67.151  Replacement of Certificate of Documentation; special procedure for wrongfully withheld document.

    When the owner of a documented vessel alleges that the Certificate 
of Documentation for that vessel is being wrongfully withheld by any 
person the owner must:
    (a) Submit to the Manager, National Vessel Documentation Center, a 
statement setting forth the reasons for the allegation; and
    (b) Upon the Manager, National Vessel Documentation Center that the 
Certificate is being wrongfully withheld, apply for replacement of the 
Certificate in accordance with the requirements of Sec. 67.141.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



    Subpart L--Validity of Certificates of Documentation; Renewal of 
     Endorsement; Requirement for Exchange, Replacement, Deletion, 
                              Cancellation



Sec. 67.161  Validity of Certificate of Documentation.

    (a) Notwithstanding any other provision of this subpart, except as 
provided in paragraph (b) of this section, a Certificate of 
Documentation but no trade endorsement thereon, issued to a vessel which 
is the subject of an outstanding mortgage filed or recorded in 
accordance with subpart Q of this part or any predecessor regulations, 
remains valid for purposes of:
    (1) 46 U.S.C. chapter 125;
    (2) 46 U.S.C. chapter 313 for an instrument filed or recorded before 
the date of invalidation, and an assignment or a notice of claim of lien 
filed after that date;
    (3) Sections 9 and 37(b) of the Shipping Act, 1916 (46 U.S.C. app. 
808, 835(b)); and
    (4) Section 902 of the Merchant Marine Act, 1936 (46 U.S.C. app. 
1242).
    (b) The provisions of paragraph (a) of this section do not apply to 
a vessel which is subject only to a mortgage filed or recorded before 
January 1, 1989, which had not attained preferred status as of that 
date.



Sec. 67.163  Renewal of endorsement.

    (a) Requirement for renewal of endorsement. Endorsements on 
Certificates of Documentation are valid for one year. Prior to the 
expiration of that year, the owner of a vessel which is not exempt from 
the requirement for documentation under paragraph (c) of Sec. 67.9 must 
apply for renewal of the endorsement(s) by complying with paragraph (b) 
of this section. The owner of a vessel exempt from the requirement for

[[Page 347]]

documentation under paragraph (c) of Sec. 67.9 must either:
    (1) Apply for renewal of the endorsement by complying with paragraph 
(b) of this section; or
    (2) Place the Certificate of Documentation on deposit in accordance 
with Sec. 67.165.
    (b) Renewal application. The owner of a vessel must apply for 
renewal of each endorsement by executing an original Notice of 
Expiration (CG-1280) or Final Notice After Expiration (CG-1280-B) 
certifying that the information contained in the Certificate of 
Documentation and any endorsement(s) thereon remains accurate, and that 
the Certificate has not been lost, mutilated, or wrongfully withheld. 
The completed CG-1280 or CG-1280-B must be forwarded to the Manager, 
National Vessel Documentation Center.
    (c) Requirement to affix decal. The owner must affix the renewal 
decal to the Certificate of Documentation. The presence of a current 
renewal decal is evidence that the endorsement has been renewed.

    Note: Renewal of endorsements on a Certificate of Documentation may 
be denied if the vessel owner is the subject of an outstanding civil 
penalty assessed by the Coast Guard.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
95-014, 60 FR 31604, June 15, 1995]



Sec. 67.165  Deposit of Certificate of Documentation.

    (a) Option for deposit in lieu of renewal of endorsement. In lieu of 
renewing the endorsement(s) in accordance with Sec. 67.163, the owner of 
a vessel which is exempt from the requirement for documentation under 
paragraph (c) of Sec. 67.9 may deposit the vessel's outstanding 
Certificate of Documentation with the National Vessel Documentation 
Center.
    (b) Reporting requirement. The owner of a vessel whose Certificate 
is on deposit in accordance with paragraph (a) of this section must make 
a written report to the National Vessel Documentation Center when:
    (1) Exchange of the Certificate is required upon the occurrence of 
one or more of the events described in Sec. 67.167 (b), (c), or (d); or
    (2) The vessel is subject to deletion from the roll of actively 
documented vessels upon the occurrence of one or more of the events 
described in Sec. 67.171(a)(1) through (8).
    (c) Validity of document on deposit. A Certificate of Documentation 
placed on deposit in accordance with paragraph (a) of this section is 
valid for the purposes of:
    (1) 46 U.S.C. chapter 125;
    (2) 46 U.S.C. chapter 313;
    (3) Sections 9 and 37(b) of the Shipping Act, 1916 (46 U.S.C. app. 
808, 835(b)); and
    (4) Section 902 of the Merchant Marine Act, 1936 (46 U.S.C. app. 
1242).

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.167  Requirement for exchange of Certificate of Documentation.

    (a) When application for exchange of the Certificate of 
Documentation is required upon the occurrence of one or more of the 
events described in paragraphs (b), (c), or (d) of this section, or the 
owner of the vessel chooses to apply for exchange of the Certificate 
pursuant to paragraph (e) of this section, the owner must send or 
deliver the Certificate to the National Vessel Documentation Center, and 
apply for an exchange of the Certificate in accordance with subpart K of 
this part.
    (b) A Certificate of Documentation together with any endorsement(s) 
thereon becomes invalid immediately, except as provided in Sec. 67.161, 
when:
    (1) The ownership of the vessel changes in whole or in part;
    (2) The general partners of a partnership change by addition, 
deletion, or substitution;
    (3) The State of incorporation of any corporate owner of the vessel 
changes;
    (4) The name of the vessel changes;
    (5) The hailing port of the vessel changes; or
    (6) The vessel is placed under the command of a person who is not a 
citizen of the United States.
    (c) A Certificate of Documentation together with any endorsement(s) 
thereon becomes invalid immediately, except as provided in Sec. 67.161 
and in paragraph (f) of this section, if the vessel is not a sea, or 
upon the vessel's

[[Page 348]]

next arrival in port anywhere in the world if the vessel is at sea, 
when:
    (1) The gross or net tonnages or dimensions of the vessel change;
    (2) Any beneficiary with an enforceable interest in a trust 
arrangement owning a vessel changes by addition or substitution;
    (3) The trustee of a trust arrangement owning a vessel changes by 
addition, substitution, or deletion;
    (4) A tenant by the entirety owning any part of the vessel dies;
    (5) The restrictions imposed on the vessel change by addition or 
substitution;
    (6) The legal name of any owner of the vessel changes;
    (7) A self-propelled vessel becomes non-self-propelled or a non-
self-propelled vessel becomes self-propelled;
    (8) The endorsements for the vessel change by addition, deletion, or 
substitution; or
    (9) A substantive or clerical error made by the issuing 
documentation officer is discovered.
    (d) Although a Certificate of Documentation and any endorsements 
thereon remain valid, the owner of a documented vessel must apply for 
exchange of the Certificate upon an election to designate a new managing 
owner of the vessel in accordance with Sec. 67.113.
    (e) Although a Certificate of Documentation and any endorsement(s) 
thereon remain valid, the owner may apply for exchange of the 
Certificate if:
    (1) The restrictions imposed on the vessel change by deletion; or
    (2) The vessel attains a special entitlement under subpart J of this 
part.
    (f) A Certificate of Documentation which becomes invalid pursuant to 
paragraph (c) of this section remains valid for the purposes of filing a 
new mortgage or amendment, assignment, assumption, or subordination 
agreement for 30 days after the date it would otherwise have become 
invalid.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31604, June 15, 1995]



Sec. 67.169  Requirement for replacement of Certificate of Documentation.

    (a) The owner of a documented vessel must make application in 
accordance with subpart K of this part for replacement of a Certificate 
of Documentation which is:
    (1) Lost;
    (2) Mutilated; or
    (3) Wrongfully withheld from the vessel owner.
    (b) When application for replacement of a Certificate of 
Documentation is required because the Certificate has been mutilated, 
the existing Certificate must be physically given up to the National 
Vessel Documentation Center.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.171  Deletion; requirement and procedure.

    (a) A Certificate of Documentation together with any endorsement(s) 
thereon is invalid, except as provided in Sec. 67.161, and the vessel is 
subject to deletion from the roll of actively documented vessels when:
    (1) The vessel is placed under foreign flag;
    (2) The vessel is sold or transferred in whole or in part to a 
person who is not a citizen of the United States within the meaning of 
subpart C of this part;
    (3) Any owner of the vessel ceases to be a citizen of the United 
States within the meaning of subpart C of this part;
    (4) The owner no longer elects to document the vessel;
    (5) The vessel no longer measures at least five net tons;
    (6) The vessel ceases to be capable of transportation by water;
    (7) The owner fails to exchange the Certificate as required by 
Sec. 67.167;
    (8) The owner fails to maintain the markings required by subpart I 
of this part;
    (9) The endorsements on the Certificate are revoked because the 
vessel owner is the subject of an outstanding civil penalty assessed by 
the Coast Guard; or
    (10) The owner fails to:
    (i) Renew the endorsement(s) as required by Sec. 67.163; or
    (ii) Comply with the provisions of Sec. 67.165.
    (b) Where a cause for deletion arises for any reason under 
paragraphs (a) (1) through (6) of this section, the owner

[[Page 349]]

must send or deliver the original Certificate of Documentation to the 
National Vessel Documentation Center together with a statement setting 
forth the reason(s) deletion is required.
    (c) When a Certificate of Documentation is required to be deleted 
because the vessel has been placed under foreign flag or has been sold 
or transferred in whole or in part to a non-citizen of the United 
States, the owner of that vessel must comply with the requirements of 
paragraph (b) of this section, and file:
    (1) Evidence of the sale or transfer, if any; and
    (2) Evidence that the Maritime Administration has consented to the 
sale or transfer, except for vessels identified in Sec. 67.11(b) and 
vessels for which the Maritime Administration has granted approval for 
unrestricted sale or transfer pursuant to regulations set forth in 46 
CFR part 221.
    (d) A certificate evidencing deletion from U.S. documentation will 
be issued upon request of the vessel owner to the National Vessel 
Documentation Center upon compliance with the applicable requirements of 
this subpart.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993, as amended by CGD 
94-008, 59 FR 49847, Sept. 30, 1994; CGD 95-014, 60 FR 31605, June 15, 
1995]



Sec. 67.173   Cancellation; requirement and procedure.

    A Certificate of Documentation issued to a vessel together with any 
endorsement(s) thereon is invalid, except as provided in Sec. 67.161, 
and subject to cancellation upon a determination by the Manager, 
National Vessel Documentation Center that the issuance of the 
Certificate was improper for any reason. When a Certificate is subject 
to cancellation, the owner of the vessel upon being notified of such 
requirement must send or deliver the Certificate to a documentation 
officer at any port of documentation. The vessel owner may submit an 
application for exchange in accordance with subpart K of this part to 
correct the error giving rise to cancellation. If the vessel for which 
the Certificate was cancelled was previously documented, it remains 
documented under the previous Certificate of Documentation, unless 
deleted under the provisions of Sec. 67.171.

    Note: Certificates of Documentation which have been canceled are 
retained at the last port of record of the vessel.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



                  Subpart M--Miscellaneous Applications



Sec. 67.175   Application for new vessel determination.

    (a) When a vessel has been constructed entirely of new materials, no 
application for a new vessel determination need be made under this 
section. Application for initial documentation must be made in 
accordance with subpart K of this part.
    (b) When parts of an existing vessel have been used in the 
construction of a vessel and the owner wants a determination that the 
resulting vessel is new in accordance with this part, the owner must 
file with the Manager, National Vessel Documentation Center;
    (1) A builder's certification, as described in Sec. 67.99;
    (2) A written statement describing the extent to which materials 
from the existing vessel were used in the construction and the extent to 
which those materials were torn down; and
    (3) Accurate sketches or blueprints of the hull and superstructure 
which must identify, where practicable, components of the old vessel.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.177  Application for foreign rebuilding determination.

    A vessel is deemed rebuilt foreign when any considerable part of its 
hull or superstructure is built upon or substantially altered outside of 
the United States. In determining whether a vessel is rebuilt foreign, 
the following parameters apply:
    (a) Regardless of its material of construction, a vessel is deemed 
rebuilt when a major component of the hull or superstructure not built 
in the United States is added to the vessel.

[[Page 350]]

    (b) For a vessel of which the hull and superstructure is constructed 
of steel or aluminum--
    (1) A vessel is deemed rebuilt when work performed on its hull or 
superstructure constitutes more than 10 percent of the vessel's 
steelweight, prior to the work, also known as discounted lightship 
weight.
    (2) A vessel may be considered rebuilt when work performed on its 
hull or superstructure constitutes more than 7.5 percent but not more 
than 10 percent of the vessel's steelweight prior to the work.
    (3) A vessel is not considered rebuilt when work performed on its 
hull or superstructure constitutes 7.5 percent or less of the vessel's 
steelweight prior to the work.
    (c) For a vessel of which the hull and superstructure is constructed 
of material other than steel or aluminum--
    (1) A vessel is deemed rebuilt when work performed on its hull or 
superstructure constitutes a quantum of work determined, to the maximum 
extent practicable, to be comparable to more than 10 percent of the 
vessel's steelweight prior to the work, calculated as if the vessel were 
wholly constructed of steel or aluminum.
    (2) A vessel may be considered rebuilt when work performed on its 
hull or superstructure constitutes a quantum of work determined, to the 
maximum extent practicable, to be comparable to more than 7.5 percent 
but not more than 10 percent of the vessel's steelweight prior to the 
work, calculated as if the vessel were wholly constructed of steel or 
aluminum.
    (3) A vessel is not considered rebuilt when work performed on its 
hull or superstructure constitutes a quantum of work determined, to the 
maximum extent practicable, to be comparable to 7.5 percent or less of 
the vessel's steelweight prior to the work, calculated as if the vessel 
were wholly constructed of steel or aluminum.
    (d) For a vessel of mixed construction, such as a vessel the hull of 
which is constructed of steel or aluminum and the superstructure of 
which is constructed of fibrous reinforced plastic, the steelweight of 
the work performed on the portion of the vessel constructed of a 
material other than steel or aluminum will be determined, to the maximum 
extent practicable, and aggregated with the work performed on the 
portion of the vessel constructed of steel or aluminum. The numerical 
parameters described in paragraph (b) of this section will then be 
applied to the aggregate of the work performed on the vessel compared to 
the vessel's steelweight prior to the work, calculated as if the vessel 
were wholly constructed of steel or aluminum, to determine whether the 
vessel has been rebuilt.
    (e) The owner of a vessel currently entitled to coastwise, Great 
Lakes, or fisheries endorsements which is altered outside the United 
States and the work performed is determined to constitute or be 
comparable to more than 7.5 percent of the vessel's steelweight prior to 
the work, or which has a major component of the hull or superstructure 
not built in the United States added, must file the following 
information with the National Vessel Documentation Center within 30 days 
following the earlier of completion of the work or redelivery of the 
vessel to the owner or owner's representative:
    (1) A written statement applying for a rebuilt determination, 
outlining in detail the work performed and naming the place(s) where the 
work was performed;
    (2) Calculations showing the actual or comparable steelweight of the 
work performed on the vessel, the actual or comparable steelweight of 
the vessel, and comparing the actual or comparable steelweight of the 
work performed to the actual or comparable steelweight of the vessel;
    (3) Accurate sketches or blueprints describing the work performed; 
and
    (4) Any further submissions requested by the National Vessel 
Documentation Center.
    (f) Regardless of the extent of actual work performed, the owner of 
a vessel currently entitled to coastwise, Great Lakes, or fisheries 
endorsements may, as an alternative to filing the items listed in 
paragraph (e) of this section, submit a written statement to the 
National Vessel Documentation Center declaring the vessel rebuilt 
outside the United States. The vessel will then be deemed to have been 
rebuilt outside

[[Page 351]]

the United States with loss of trading privileges.
    (g) A vessel owner may apply for a preliminary rebuilt determination 
by submitting:
    (1) A written statement applying for a preliminary rebuilt 
determination, outlining in detail the work planned and naming the 
place(s) where the work is to be performed;
    (2) Calculations showing the actual or comparable steelweight of 
work to be performed on the vessel, the actual or comparable steelweight 
of the vessel, and comparing the actual or comparable steelweight of the 
planned work to the actual or comparable steelweight of the vessel;
    (3) Accurate sketches or blueprints describing the planned work; and
    (4) Any further submissions requested by the National Vessel 
Documentation Center.

    Note: A statement submitted in accordance with paragraph (f) of this 
section does not constitute an application for a rebuilt determination 
and does not require payment of a fee.

[CGD 94-040, 61 FR 17815, Apr. 22, 1996]



                          Subpart N--[Reserved]



   Subpart O--Filing and Recording of Instruments--General Provisions



Sec. 67.200   Instruments eligible for filing and recording.

    Only the following listed instruments are eligible for filing and 
recording:
    (a) Bills of sale and instruments in the nature of bills of sale;
    (b) Deeds of gift;
    (c) Mortgages and assignments, assumptions, supplements, amendments, 
subordinations, satisfactions, and releases thereof;
    (d) Preferred mortgages and assignments, assumptions, supplements, 
amendments, subordinations, satisfactions, and releases thereof;
    (e) Interlender agreements affecting mortgages, preferred mortgages, 
and related instruments; and
    (f) Notices of claim of lien, assignments, amendments, and 
satisfactions and releases thereof.



Sec. 67.203   Restrictions on filing and recording.

    (a) No instrument will be accepted for filing unless the vessel to 
which it pertains is the subject of:
    (1) A valid Certificate of Documentation; or
    (2) An application for initial documentation, exchange of 
Certificate of Documentation, return to documentation, or for deletion 
from documentation, which is in substantial compliance with the 
applicable regulations, submitted to the National Vessel Documentation 
Center.
    (b) An instrument identified as eligible for filing and recording 
under Sec. 67.200 may not be filed and recorded if it bears a material 
alteration.
    (c) An instrument identified as eligible for filing and recording 
under Sec. 67.200 (a) or (b) may not be filed and recorded if any vendee 
or transferee under the instrument is not a citizen of the United States 
as defined in Section 2 of the Shipping Act, 1916, (46 U.S.C. app. 802) 
unless the Maritime Administration has consented to the grant to a non-
citizen made under the instrument.
    (d) The restriction imposed by paragraph (c) of this section does 
not apply to a bill of sale or deed of gift conveying an interest in a 
vessel which was neither documented nor last documented pursuant to 
these regulations or any predecessor regulations thereto at the time the 
instrument was executed, nor to an instrument conveying an interest in a 
vessel identified in Sec. 67.11(b).
    (e) An instrument identified as eligible for filing and recording 
under Sec. 67.200(c) may not be filed or recorded if the mortgagee or 
assignee is not a person qualifying as a citizen of the United States as 
defined in the Shipping Act, 1916, as amended, (46 U.S.C. app. Chapter 
23) or a trustee as defined in 46 U.S.C. 31328, unless the Maritime 
Administration has consented to the grant to a non-citizen made under 
the instrument. This restriction does not apply to an instrument 
conveying an interest in a vessel identified in Sec. 67.11(b).
    (f) An instrument identified as eligible for filing and recording 
under Sec. 67.200(d) may not be filed or recorded

[[Page 352]]

if the mortgagee or assignee is not a person described in 46 U.S.C. 
31322(a)(1)(D). This restriction does not apply to an instrument 
conveying an interest in a vessel identified in Sec. 67.11(b).

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.205  Requirement for vessel identification.

    (a) Every instrument presented for filing and recording must contain 
sufficient information to clearly identify the vessel(s) to which the 
instrument relates.
    (b) Instruments pertaining to vessels which have been documented 
must contain the vessel's name and official number, or other unique 
identifier.
    (c) Vessels which have never been documented must be identified by 
one of the following:
    (1) The vessel's Hull Identification Number assigned in accordance 
with 33 CFR 181.25; or
    (2) Other descriptive information, which clearly describes the 
vessel. Such information may include length, breadth, depth, year of 
build, name of manufacturer, and any numbers which may have been 
assigned in accordance with 33 CFR part 173.



Sec. 67.207  Requirement for date and acknowledgment.

    (a) Every instrument presented for filing and recording must:
    (1) Bear the date of its execution; and
    (2) Contain an acknowledgment.
    (b) No officer or employee of the Coast Guard is authorized to take 
such acknowledgments unless the instrument is executed on behalf of the 
Federal Government of the United States.



Sec. 67.209  Required number of copies.

    All instruments presented for filing and recording must be presented 
in duplicate; at least one copy must bear original signatures.



Sec. 67.211  Requirement for citizenship declaration.

    (a) Instruments in the nature of a bill of sale or deed of gift, 
mortgages, and assignments of mortgages conveying an interest in a 
documented vessel are ineligible for filing and recording unless 
accompanied by a declaration of citizenship, except as provided in 
paragraph (c) and (d) of this section.
    (b) Citizenship declarations must be executed on the form prescribed 
by the Maritime Administration in 46 CFR part 221. These forms are 
available from the National Vessel Documentation Center and from the 
Vessel Transfer and Disposal Officer (MAR-745.1), Maritime 
Administration, United States Department of Transportation, Washington, 
DC 20590.
    (c) The requirement for presentation of a citizenship declaration 
does not apply to a transaction conveying an interest in a vessel:
    (1) Described in 46 CFR 221.11(b)(1) (i) through (iv);
    (2) To a person making application for documentation; or
    (3) To an entity of the Federal Government of the United States or 
of a State or political subdivision thereof, or a corporate entity which 
is an agency of any such government or political subdivision.
    (d) The requirement for presentation of a citizenship declaration is 
waived when the instrument(s) presented for filing effects a transfer 
for which:
    (1) The Maritime Administration has given general approval in 46 CFR 
part 221; or
    (2) Written approval of the Maritime Administrator has been obtained 
in accordance with 46 CFR part 221.
    (e) If the transfer of interest is one which requires written 
approval of the Maritime Administrator in accordance with rules in 46 
CFR part 221, evidence of that approval must be presented for filing 
with the instrument effecting the transfer of interest.

    Note: If the grantee(s) of an ownership interest in a vessel 
described in paragraphs (c)(1) or (d) of this section do(es) not make 
application for documentation, a declaration of citizenship may be 
required in order to ensure that the vessel so conveyed retains any 
coastwise or Great Lakes privileges to which it may be entitled.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]

[[Page 353]]



Sec. 67.213  Place of filing and recording.

    (a) All instruments submitted for filing and recording must be 
submitted to the National Vessel Documentation Center.
    (b) All instruments are recorded at the National Vessel 
Documentation Center.

[CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.215  Date and time of filing.

    (a) An instrument is deemed filed at the actual date and time at 
which the instrument is received by the National Vessel Documentation 
Center, except as provided in paragraph (b) of this section. Any 
materials submitted to supplement an instrument after the instrument is 
filed are deemed part of the original filing and relate back to the date 
and time of that filing.
    (b) If filing of an instrument is subject to termination in 
accordance with Sec. 67.217(a) and a new instrument is filed as a 
substitute for the original instrument, the filing of the original 
instrument will be terminated in accordance with Sec. 67.217(c) and the 
substitute instrument will be considered a new filing. The substitute 
instrument will be deemed filed at the actual time and date it is 
received by the National Vessel Documentation Center.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.217  Termination of filing and disposition of instruments.

    (a) The filing of an instrument is subject to termination if:
    (1) It is determined that the instrument cannot be recorded because 
the instrument itself is not in substantial compliance with the 
applicable regulations in this part;
    (2) The filing was not made in compliance with the requirements of 
Sec. 67.213;
    (3) The Application for Initial Issue, Exchange, or Replacement of 
Certificate of Documentation; or Redocumentation (form CG-1258) 
submitted with the instrument(s) was not made in substantial compliance 
with the applicable regulations of this part;
    (4) The owner of the vessel submits an Application, Consent, and 
Approval for Withdrawal of Application for Documentation or Exchange of 
Certificate of Documentation (form CG-4593), with mortgagee consent, if 
applicable; or
    (5) Another instrument is filed evidencing satisfaction or release 
of the subject instrument and the subject instrument is one described in 
subpart Q of this part.
    (b) Ninety days prior to terminating the filing pursuant to a reason 
listed in paragraphs (a) (1), (2), or (3) of this section, the National 
Vessel Documentation Center will send written notice detailing the 
reasons the filing is subject to termination to the following person(s) 
and any agent known to be acting on behalf of the same:
    (1) The applicant for documentation, if a bill of sale, instrument 
in the nature of a bill of sale, or a deed of gift;
    (2) The mortgagee or assignee, if a mortgage or assignment or 
amendment thereof;
    (3) The claimant, if a notice of claim of lien; or
    (4) The lender first named in an interlender agreement affecting a 
mortgage, preferred mortgage, or related instrument.
    (c) If the reason(s) which subject the filing to termination remain 
uncorrected for a period of 90 days after the notice described in 
paragraph (b) of this section is sent, or upon receipt of the request 
for withdrawal described in paragraph (a)(4) of this section, or 
satisfaction or release as described in paragraph (a)(5) of this 
section, the instrument will be returned to either:
    (1) The applicant for documentation, if a bill of sale, instrument 
in the nature of a bill of sale, or a deed of gift;
    (2) The mortgagee or assignee, if a mortgage or assignment or 
amendment thereof;
    (3) The claimant, if a notice of claim of lien;
    (4) The lender first named in an interlender agreement affecting a 
mortgage, preferred mortgage, or related instrument; or
    (5) An agent for any appropriate party, provided that the agent has 
filed with the Coast Guard a writing bearing the original signature of 
the appropriate party(ies) clearly identifying the

[[Page 354]]

instrument(s) being returned and stating that the instrument(s) may be 
returned to the agent.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.219  Optional filing of instruments by facsimile.

    (a) Any instrument identified as eligible for filing and recording 
under Sec. 67.200 may be submitted by facsimile for filing to the 
National Vessel Documentation Center at (304) 271-2400. If the 
instrument submitted by facsimile for filing pertains to a vessel that 
is not a currently documented vessel, a properly completed Application 
for Initial Issue, Exchange, or Replacement Certificate of 
Documentation; or Redocumentation (form CG-1258); or a letter 
application for deletion from documentation must already be on file with 
the National Vessel Documentation Center or must be submitted by 
facsimile with the instrument being submitted by facsimile for filing.
    (b) Within 10 days of submission by facsimile for filing, the 
original and one copy of any instrument submitted by facsimile for 
filing must be received by the National Vessel Documentation Center. If 
not already on file, the original of any application required by 
paragraph (a) of this section must also be received by the National 
Vessel Documentation Center within 10 days of submission of the 
instrument by facsimile for filing.
    (c) Upon receipt of the original instrument and copy in accordance 
with paragraph (b) of this section, the instrument may be recorded 
provided it complies with the requirements of this part.
    (d) All instruments submitted by facsimile for filing must be 
clearly legible, be submitted from 8\1/2\-inch by 11-inch paper in not 
less than 10-point type size, and be accompanied by a cover sheet.
    (e) The facsimile cover sheet required by paragraph (d) of this 
section should indicate:
    (1) The name, address, telephone number, and facsimile telephone 
number of the person submitting the instrument by facsimile;
    (2) The number of pages submitted by facsimile; and
    (3) The name of the vessel, official number or hull identification 
number of the vessel, and the name(s) of the owner(s) of the vessel to 
which the instrument relates.
    (f) The filing of any instrument submitted by facsimile is 
terminated and the instrument will be returned to the submitter if:
    (1) The instrument is subject to termination for any cause under 
Sec. 67.217(a);
    (2) The original instrument and copy required to be submitted in 
accordance with paragraph (b) of this section is not received within the 
10-day period; or
    (3) There is any alteration between the instrument submitted by 
facsimile for filing and the original instrument and copy received in 
accordance with paragraph (b) of this section.
    (g) When the filing of an instrument submitted by facsimile is 
terminated for an alteration in accordance with paragraph (f)(3) of this 
section, the original instrument and copy received in accordance with 
paragraph (b) of this section will be deemed to be an original filing 
under this subpart subject to termination. The procedures for written 
notification of the termination of the filing and for the disposition of 
instruments described in paragraphs (b) and (c) of Sec. 67.217 will 
apply.

[CGD 95-070, 60 FR 40241, Aug. 7, 1995]



   Subpart P--Filing and Recording of Instruments--Bills of Sale and 
                           Related Instruments



Sec. 67.220  Requirements.

    An instrument in the nature of a bill of sale or a deed of gift 
must:
    (a) Meet all of the requirements of subpart O of this part;
    (b) Be signed by or on behalf of all the seller(s) or donor(s); and
    (c) Recite the following:
    (1) The name(s) and address(es) of the seller(s) or donor(s) and the 
interest in the vessel held by the seller(s) or donor(s); and
    (2) The name(s) and address(es) of the buyer(s) or donee(s) and the 
interest in the vessel held by each buyer or donee.

[[Page 355]]



Sec. 67.223  Filing limitation.

    An instrument presented for filing and recording under this subpart 
may be filed only in conjunction with an application for initial 
documentation or return to documentation of the vessel or with an 
application for a change to or deletion of the vessel's outstanding 
Certificate of Documentation.



  Subpart Q--Filing and Recording of Instruments--Mortgages, Preferred 
                   Mortgages, and Related Instruments



Sec. 67.231  General requirements; optional application for filing and recording.

    (a) A mortgage or related instrument presented for filing and 
recording must meet all of the requirements of subpart O of this part in 
addition to the pertinent section(s) of this subpart.
    (b) All instruments supplemental to mortgages must recite 
information which clearly identifies the mortgage to which the 
supplemental instrument is applicable. Such information will normally 
consist of the book and page where that mortgage is recorded and the 
date and time of filing. If the submission of the supplemental 
instrument is contemporaneous with submission of the mortgage, the 
information should include the names of all parties to the mortgage, the 
date of the mortgage, and the amount of the mortgage.
    (c) An Optional Application for Filing (CG-5542) may be attached to 
a mortgage or related instrument. If form CG-5542 is properly completed 
with all information required for indexing the instrument and the 
signature(s) specified thereon, the instrument to which it is attached 
will be filed and recorded with no further review.



Sec. 67.233  Restrictions on recording mortgages, preferred mortgages, and related instruments.

    (a) A mortgage or assumption of mortgage which otherwise meets the 
requirements of this subpart is nonetheless not eligible for filing and 
recording if:
    (1) The mortgagor or assuming party(ies) did not actually hold legal 
title to the interest in the vessel being mortgaged or covered by the 
assumption at the time of filing of the mortgage or assumption; or
    (2) If the vessel(s) which the mortgage cover(s) is (are) not 
documented or not the subject of an application for documentation.
    (b) Except as provided in paragraph (c) of this section, a mortgage 
submitted for filing and recording as a preferred mortgage or 
supplemental instrument thereto which otherwise meets the requirements 
of this subpart, is eligible for filing and recording only if it results 
in a mortgage interest being held by:
    (1) A State;
    (2) The United States Government;
    (3) A federally insured depository institution which has not been 
disapproved by the Secretary;
    (4) An individual who is a citizen of the United States;
    (5) A person qualifying as a citizen of the United States as defined 
in 46 U.S.C. app. 802; or
    (6) A person approved by the Secretary.
    (c) The requirements of paragraph (b) of this section do not apply 
to the mortgagee of a vessel identified in Sec. 67.11(b) or to any other 
vessel to which the Maritime Administration has given approval for 
unrestricted transfer pursuant to regulations in 46 CFR part 221.


    Note: Disapproval of a federally insured depository institution as a 
preferred mortgagee under Sec. 67.233(b)(3), or approval of a person as 
a preferred mortgagee under Sec. 67.233(b)(6) is determined by the 
Maritime Administration pursuant to regulations in 46 CFR part 221.



Sec. 67.235  Requirements for mortgages.

    (a) A mortgage presented for filing and recording must:
    (1) Be signed by or on behalf of each mortgagor; and
    (2) Recite the following:
    (i) The name and address of each mortgagor and the interest in the 
vessel held by the mortgagor(s);
    (ii) The name and address of each mortgagee and the interest in the 
vessel granted by the mortgage; and

[[Page 356]]

    (iii) The amount of the direct or contingent obligations that is or 
may become secured by the mortgage, excluding interest, expenses, and 
fees. The amount may be recited in one or more units of account as 
agreed to by the parties.
    (b) A mortgage submitted for filing and recording as a preferred 
mortgage must cover the whole of a vessel.
    (c) A mortgage which secures more than one vessel may, at the option 
of the parties, provide for separate discharge of such vessels.



Sec. 67.237  Requirements for assignments of mortgages.

    An assignment of mortgage presented for filing and recording must:
    (a) Be signed by or on behalf of each assignor; and
    (b) Recite the following:
    (1) The name and address of each assignor and the interest in the 
mortgage held by the assignor(s); and
    (2) The name and address of each assignee and the interest in the 
mortgage granted to the assignee(s).



Sec. 67.239  Requirements for assumptions of mortgages.

    An assumption of mortgage presented for filing and recording must:
    (a) Be signed by or on behalf of each original mortgagor, each 
mortgagee, and each assuming party; and
    (b) Recite the following:
    (1) The name and address of each original mortgagor and the interest 
in the vessel mortgaged; and
    (2) The name and address of each assuming party and the interest in 
the mortgage assumed.



Sec. 67.241  Requirements for amendments of or supplements to mortgages.

    An amendment of or supplement to a mortgage presented for filing and 
recording must:
    (a) Be signed by or on behalf of each mortgagor and each mortgagee; 
and
    (b) Recite the following:
    (1) The name and address of each mortgagor and mortgagee; and
    (2) The nature of the change effected by the instrument.



Sec. 67.243  Requirements for instruments subordinating mortgages.

    An instrument subordinating a mortgage presented for filing and 
recording must:
    (a) Be signed by or on behalf of each mortgagee whose mortgage is 
being subordinated; and
    (b) Recite the following:
    (1) The name and address of each mortgagee whose mortgage is being 
subordinated; and
    (2) The name and address of each party holding an interest in the 
instrument subordinating the mortgage.



Sec. 67.245  Requirements for interlender agreements.

    An interlender agreement between multiple mortgagees must:
    (a) Be signed by or on behalf of all mortgagees who are party to the 
interlender agreement; and
    (b) Recite the names and addresses of all parties to the interlender 
agreement.



Subpart R--Filing and Recording of Instruments--Notices of Claim of Lien 
                      and Supplemental Instruments



Sec. 67.250  General requirements.

    (a) A notice of claim of lien or supplemental instrument thereto 
submitted for filing and recording must meet all of the requirements of 
subpart O of this part.
    (b) An instrument assigning or amending a notice of claim of lien 
must recite information which clearly identifies the notice of claim of 
lien being assigned or amended. Such information will normally consist 
of the book and page where the notice of claim is recorded and the date 
and time of filing. If the submission of the assignment or amendment is 
contemporaneous with submission of the notice of claim of lien, the 
information should include the name of each original claimant, the date 
of the notice of claim, and the amount of the claim and other 
information to adequately identify the notice of claim of lien being 
assigned or amended.

[[Page 357]]



Sec. 67.253  Requirements for notices of claim of lien.

    A notice of claim of lien must:
    (a) Be signed by or on behalf of each claimant; and
    (b) Recite the following:
    (1) The name and address of each claimant;
    (2) The nature of the lien claimed;
    (3) The date on which the lien was established; and
    (4) The amount of the lien claimed.



Sec. 67.255  Restrictions on filing and recording.

    A notice of claim of lien is not entitled to filing and recording 
unless the vessel against which the lien is claimed is covered by a 
preferred mortgage filed or recorded in accordance with subpart Q of 
this part or predecessor regulations thereto and which is outstanding at 
the time the lien is filed and recorded.



Sec. 67.257  Requirements for assignments of notices of claim of lien.

    An assignment of a notice of claim of lien must:
    (a) Be signed by or on behalf of each original claimant or last 
assignee of record; and
    (b) Recite the following:
    (1) The name and address of each claimant; and
    (2) The name and address of each assignee and the interest in the 
claim being assigned.



Sec. 67.259  Requirements for amendments to notice of claim of lien.

    An amendment to notice of claim of lien presented for filing and 
recording must:
    (a) Be signed by or on behalf of each original claimant or last 
assignee of record; and
    (b) Recite the nature of the change being effected by the 
instrument.



                   Subpart S--Removal of Encumbrances



Sec. 67.261  General requirements.

    The filing of an instrument against a vessel in accordance with 
subparts Q or R of this part may be terminated and, if recorded, removed 
from the record of that vessel by the filing of:
    (a) A court order, affidavit, or Declaration of Forfeiture described 
in Sec. 67.263; or
    (b) A satisfaction or release instrument described in Sec. 67.265 
which meets the requirements of this part for filing and recording.



Sec. 67.263  Requirement for removal of encumbrances by court order, affidavit, or Declaration of Forfeiture.

    The encumbrances described in subparts Q and R of this part are 
removed from the record upon filing of:
    (a) A copy of the order from a court of competent jurisdiction 
certified by an official of the court declaring title to the vessel to 
be free and clear, or declaring the encumbrance to be of no effect, or 
ordering the removal of the encumbrance from the record;
    (b) A copy of the order from a Federal District Court in an in rem 
action certified by an official of the court requiring the free and 
clear sale of the vessel at a Marshal's sale and, where issued under 
local judicial procedures, a copy of the order confirming such sale 
certified by an official of the court;
    (c) A copy of an order from a Federal District Court certified by an 
official of the court declaring the vessel itself or the proceeds of its 
sale to be forfeited to the Federal Government of the United States for 
a breach of its laws; or
    (d) Where the vessel was forfeited under an administrative 
forfeiture action to the Federal Government of the United States, either 
an affidavit from an officer of the agency which performed the 
forfeiture, who has personal knowledge of the particulars of the 
vessel's forfeiture, or a Declaration of Forfeiture issued by the agency 
which performed the forfeiture.



Sec. 67.265  Requirements for instruments evidencing satisfaction or release.

    An instrument satisfying or releasing a mortgage, a notice of claim 
of lien, or a preferred mortgage presented for filing and recording 
must:
    (a) Meet all the requirements of subpart O of this part;
    (b) Be signed by or on behalf of:
    (1) Each mortgagee if a mortgage; or

[[Page 358]]

    (2) Each claimant if a notice of claim of lien; and
    (c) Recite the following:
    (1) The name of each mortgagor, if any, and the name of each 
mortgagee or claimant;
    (2) The amount of the mortgage or claim of lien; and
    (3) Information which clearly identifies the mortgage or claim of 
lien being satisfied or released. Such information will normally consist 
of the book and page where that mortgage or claim of lien is recorded. 
If the recording information cannot be provided because the satisfaction 
or release is being submitted prior to recording of the mortgage or 
claim of lien, the instrument must recite other information sufficient 
to clearly identify the encumbrance being satisfied or released.



       Subpart T--Abstracts of Title and Certificates of Ownership

    Source:CGD 95-014, 60 FR 31605, June 15, 1995, unless otherwise 
noted.



Sec. 67.301  Issuance of Abstract of Title.

    Any person may request the National Vessel Documentation Center to 
issue a General Index or Abstract of Title (form CG-1332) for a vessel.



Sec. 67.303  Issuance of Certificate of Ownership.

    Any person may request the National Vessel Documentation Center to 
issue a Certificate of Ownership (form CG-1330) for a vessel.



                      Subpart U--Special Provisions



Sec. 67.311  Alteration of Certificate of Documentation.

    Except for affixing a new address label in accordance with the 
direction of a documentation officer or a renewal decal issued in 
accordance with Sec. 67.163, no person other than a documentation 
officer shall intentionally alter a Certificate of Documentation.



Sec. 67.313  Requirement to have Certificate of Documentation on board.

    (a) The person in command of a documented vessel must have on board 
that vessel the original Certificate of Documentation currently in 
effect for that vessel.
    (b) The requirement of paragraph (a) of this section does not apply:
    (1) To non-self-propelled vessels not engaged in foreign trade;
    (2) When the Certificate of Documentation has been submitted to the 
National Vessel Documentation Center for exchange in accordance with 
Sec. 67.167 (d) or (e); or
    (3) When the vessel is in storage or out of the water.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.315  Requirement to produce Certificate of Documentation.

    (a) The person in command of a documented vessel must produce the 
original Certificate of Documentation currently in effect for that 
vessel upon the demand of any person acting in an official public 
capacity.
    (b) The requirement of paragraph (a) of this section does not apply:
    (1) To non-self-propelled vessels not engaged in foreign trade;
    (2) When the Certificate of Documentation has been submitted to the 
National Vessel Documentation Center for exchange in accordance with 
Sec. 67.167 (d) or (e); or
    (3) When the vessel is in storage or out of the water.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.317  Requirement to renew endorsements on the Certificate of Documentation.

    (a) Except as provided in paragraph (b) of this section, the owner 
of a documented vessel must annually renew each endorsement upon the 
current Certificate of Documentation for that vessel in accordance with 
Sec. 67.163.
    (b) The requirement of paragraph (a) of this section does not apply 
to Certificates of Documentation placed on deposit in accordance with 
Sec. 67.165.



Sec. 67.319  Requirement to report change in vessel status and surrender Certificate of Documentation.

    The owner of a documented vessel must immediately report any change

[[Page 359]]

in vessel status which causes any Certificate of Documentation to become 
invalid under subpart L of this part and which must be exchanged, 
replaced, deleted, or canceled, to the National Vessel Documentation 
Center. The outstanding Certificate must be surrendered in accordance 
with the requirements of subparts K and L of this part.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 67.321  Requirement to report change of address of managing owner.

    Upon the change of address of the managing owner of a documented 
vessel, the managing owner shall report the change of address to the 
National Vessel Documentation Center within 10 days of its occurrence.

[CGD 94-008, 59 FR 49847, Sept. 30, 1994, as amended by CGD 95-014, 60 
FR 31605, June 15, 1995]



Sec. 67.323  Operation without documentation.

    No vessel which is required by Sec. 67.7 to be documented may engage 
in unlimited coastwise trade, the Great Lakes trade, or the fisheries 
without being documented in accordance with the requirements of this 
part.



Sec. 67.325  Violation of endorsement.

    A vessel may not be employed in any trade other than a trade 
endorsed upon the Certificate of Documentation issued for that vessel. A 
vessel documented exclusively for recreation may not be used for 
purposes other than pleasure.



Sec. 67.327  Operation under Certificate of Documentation with invalid endorsement.

    Except for vessels identified in Sec. 67.9, no vessel may be 
operated under a Certificate of Documentation with endorsements which 
have become invalid under subpart L of this part.



Sec. 67.329  Unauthorized name change.

    The owner of a documented vessel may not change or allow the change 
of the name of that vessel without exchanging the vessel's Certificate 
of Documentation in accordance with subpart K of this part. The new name 
of the vessel must be marked on the vessel upon receipt of the new 
Certificate of Documentation.



Sec. 67.331  Improper markings.

    The owner of a documented vessel shall not permit the operation of 
that vessel unless it is marked in accordance with subpart I of this 
part.



                        Subparts V-X--[Reserved]



                             Subpart Y--Fees



Sec. 67.500  Applicability.

    (a) This subpart specifies documentation services provided for 
vessels for which fees are applicable. No documentation service for 
which a fee is applicable will be performed until the appropriate fee 
has been paid. Fees are contained in Table 67.550.
    (b) There is no fee for the annual renewal of endorsements upon the 
Certificate of Documentation, unless renewal is late.
    (c) There is no fee for replacement of a Certificate of 
Documentation due to a wrongful withholding.
    (d) The Manager, National Vessel Documentation Center may waive 
collection of fees applicable under this subpart for a service provided 
to a Federal agency when the fee would be directly paid with federally-
appropriated funds by a Federal agency acting in its own behalf.
    (e) Application fees under this subpart are not refundable.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended at CGD 95-014, 60 FR 31605, June 15, 1995; CGD 95-
070, 60 FR 40241, Aug. 7, 1995]



Sec. 67.501  Application for Certificate of Documentation.

    An application fee is charged for an initial Certificate of 
Documentation in accordance with subpart K of this part. If application 
is made for any trade endorsement, the applicable fee under Sec. 67.511 
will be charged in addition to the application fee for the Certificate. 
The application fee does not include the fee under Sec. 67.527 for 
filing and recording any required bills of sale or instruments in the 
nature of a bill of

[[Page 360]]

sale, or the application fee under Sec. 67.519 for waivers in accordance 
with Secs. 67.89 or 67.101.



Sec. 67.503  Application for exchange or replacement of a Certificate of Documentation.

    (a) An application fee is charged for exchange or the simultaneous 
exchange and replacement of a Certificate of Documentation in accordance 
with subpart K of this part. Only a single application fee will be 
assessed when two or more reasons for exchange occur simultaneously. If 
application is made for any trade endorsement, the applicable fee under 
Sec. 67.511 will be charged in addition to the application fee for the 
exchange or replacement.
    (b) The application fee for exchange or replacement does not apply 
to:
    (1) Endorsement of a change in the owner's address;
    (2) Exchange or replacement solely by reason of clerical error on 
the part of a documentation officer; or
    (3) Deletion of a vessel from documentation.



Sec. 67.505  Application for return of vessel to documentation.

    An application fee is charged for a return of a vessel to 
documentation after deletion in accordance with subpart K of this part. 
If application is made for any trade endorsement, the applicable fee 
under Sec. 67.511 will be charged in addition to the application fee for 
return to documentation.



Sec. 67.507  Application for replacement of lost or mutilated Certificate of Documentation.

    An application fee is charged for replacement of a lost or mutilated 
Certificate of Documentation in accordance with subpart K of this part.



Sec. 67.509  Application for approval of exchange of Certificate of Documentation requiring mortgagee consent.

    An application fee is charged for approval of exchange of a 
Certificate of Documentation requiring mortgagee consent in accordance 
with subpart K of this part.



Sec. 67.511  Application for trade endorsement(s).

    (a) Coastwise or Great Lakes endorsement. An application fee is 
charged for a coastwise or a Great Lakes endorsement, or both, in 
accordance with subpart B of this part.
    (b) Coastwise Bowaters endorsement. An application fee is charged 
for a coastwise Bowaters endorsement in accordance with 46 CFR part 68.
    (c) Fishery endorsement. An application fee is charged for a fishery 
endorsement in accordance with subpart B of this part.
    (d) Registry or recreational endorsement. There is no application 
fee for a registry or recreational endorsement, or both.
    (e) When multiple trade endorsements are requested on the same 
application, only the single highest applicable endorsement fee will be 
charged.



Sec. 67.513  Application for evidence of deletion from documentation.

    An application fee is charged for evidence of deletion from 
documentation in accordance with subpart L of this part.
Sec. 67.515  [Reserved]



Sec. 67.517  Application for late renewal.

    An application fee is charged for a late renewal in accordance with 
subpart L of this part.



Sec. 67.519  Application for waivers.

    An application fee is charged for waiver of original build evidence 
in accordance with subpart F of this part, or for waiver of bill of sale 
eligible for filing and recording in accordance with subpart E of this 
part. In cases where more than one waiver is required, each wavier 
application is subject to this fee.



Sec. 67.521  Application for new vessel determination.

    An application fee is charged for a new vessel determination in 
accordance with subpart M of this part.



Sec. 67.523  Application for wrecked vessel determination.

    An application fee is charged for a determination of whether a 
vessel is

[[Page 361]]

entitled to coastwise, Great Lakes, and fisheries privileges as a result 
of having been wrecked in waters adjacent to the United States and 
repaired in accordance with subpart J of this part. This fee is in 
addition to the cost associated with the vessel appraisals.



Sec. 67.525  Application for determination of rebuild.

    An application fee is charged for a determination of whether a 
vessel has been rebuilt in accordance with subpart M of this part. This 
fee will be assessed for each request for either a preliminary or final 
determination submitted in writing by the vessel owner or the vessel 
owner's representative.



Sec. 67.527  Application for filing and recording bills of sale and instruments in the nature of a bill of sale.

    An application fee is charged for filing and recording bills of sale 
and instruments in the nature of a bill of sale in accordance with 
subpart P of this part.



Sec. 67.529  Application for filing and recording mortgages and related instruments.

    An application fee is charged for filing and recording mortgages and 
related instruments in accordance with subpart Q of this part.



Sec. 67.531  Application for filing and recording notices of claim of lien.

    An application fee is charged for filing and recording notices of 
claim of lien in accordance with subpart R of this part.



Sec. 67.533  Application for Certificate of Compliance.

    An application fee is charged for a Certificate of Compliance to be 
issued in accordance with regulations set forth in 46 CFR part 68.



Sec. 67.535  Issuance of Abstract of Title.

    An issuance fee is charged for a General Index or Abstract of Title 
in accordance with subpart T of this part.



Sec. 67.537  Issuance of Certificate of Ownership.

    An issuance fee is charged for a Certificate of Ownership in 
accordance with subpart T of this part. A supplemental issuance fee is 
charged for a Certificate of Ownership attachment for each additional 
vessel with the same ownership and encumbrance information.



Sec. 67.539  Copies of instruments and documents.

    The fee charged for furnishing a copy of any instrument or document 
is calculated in the same manner as described in 49 CFR 7.95.

[CGD 94-008, 59 FR 49847, Sept. 30, 1994]



Sec. 67.540  Facsimile handling fee.

    A handling fee is charged for processing an instrument submitted by 
facsimile for filing in accordance with subpart O of this part.

[CGD 95-070, 60 FR 40242, Aug. 7, 1995]



Sec. 67.550  Fee table.

    The fees charged under subpart Y are as set forth in Table 67.550.

                           Table 67.550.--Fees                          
------------------------------------------------------------------------
            Activity                      Reference              Fee    
------------------------------------------------------------------------
Applications:                                                           
    Initial certificate of       Subpart K.................      $133.00
     documentation.                                                     
    Exchange of certificate of   do........................        84.00
     documentation.                                                     
    Return of vessel to          do........................        84.00
     documentation.                                                     
    Replacement of lost or       do........................        50.00
     mutilated certificate of                                           
     documentation.                                                     
    Approval of exchange of      do........................        24.00
     certificate of                                                     
     documentation requiring                                            
     mortgagee consent.                                                 
    Trade endorsement(s):                                               
      Coastwise endorsement....  Subpart B.................        29.00
      Coastwise Bowaters         46 CFR part 68............        29.00
       endorsement.                                                     
      Great Lakes endorsement..  Subpart B.................        29.00
      Fishery endorsement......  do........................        12.00
      Registry endorsement.....  do........................         none
      Recreational endorsement.  do........................         none
                                                                        

[[Page 362]]

                                                                        
    Note: When multiple trade endorsements are requested on the same    
 application, only the single highest applicable endorsement fee will be
 charged, resulting in a maximum endorsement fee of $29.00              
                                                                        
    Evidence of deletion from    Subpart L.................        15.00
     documentation.                                                     
    Late renewal fee...........  do........................         5.00
Waivers:                                                                
    Original build evidence....  Subpart F.................        15.00
    Bill of sale eligible for    Subpart E.................       15.00'
     filing and recording.                                              
Miscellaneous applications:                                             
    Wrecked vessel               Subpart J.................       555.00
     determination.                                                     
    New vessel determination...  Subpart M.................       166.00
    Rebuild determination--      do........................       450.00
     preliminary or final.                                              
Filing and recording:                                                   
    Bills of sale and            Subpart P.................    8.00(\1\)
     instruments in nature of                                           
     bills of sale.                                                     
    Mortgages and related        Subpart Q.................    4.00(\1\)
     instruments.                                                       
    Notice of claim of lien and  Subpart R.................    8.00(\1\)
     related instruments.                                               
    Facsimile submission         Subpart O.................    2.00(\1\)
     handling.                                                          
Certificate of compliance:                                              
    Certificate of compliance..  46 CFR part 68............        55.00
Miscellaneous:                                                          
    Abstract of Title..........  Subpart T.................        25.00
    Certificate of ownership...  do........................       125.00
      Attachment for each        do........................        10.00
       additional vessel with                                           
       same ownership and                                               
       encumbrance data.                                                
    Copy of instrument or        (\2\).....................        (\2\)
     document.                                                          
------------------------------------------------------------------------
\1\ Per page.                                                           
\2\ Fees will be calculated in accordance with 49 CFR 7.95.             


[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65243, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995; CGD 95-
070, 60 FR 40242, Aug. 7, 1995]



PART 68--DOCUMENTATION OF VESSELS PURSUANT TO EXTRAORDINARY LEGISLATIVE GRANTS--Table of Contents




Subpart 68.01--Regulations Implementing the Act of September 2, 1958 (46 
                              U.S.C. 883-1)

Sec.
68.01-1  Definitions for the purposes of this subpart.
68.01-3  Requirements for citizenship under 46 U.S.C. 883-1.
68.01-5  Qualification as an 883-1 corporation.
68.01-7  Qualification as a parent or subsidiary.
68.01-9  Cessation of qualification.
68.01-11  Privileges conferred--documentation of vessel.
68.01-13  Privileges conferred--operation of vessels.
68.01-15  Restrictions.
68.01-17  Application by an 883-1 corporation to document a vessel.

Appendix A to Subpart 68.01--Oath for Qualification of Corporation as a 
          Citizen of the United States Under the Act of Sept. 2, 1958 
          (46 U.S.C. 883-1)
Appendix B to Subpart 68.01--Oath of Parent or Subsidiary Corporation 
          Act of Sept. 2, 1958 (46 U.S.C. 883-1)

   Subpart 68.03--[Reserved for Regulation, as Necessary, of Vessels 
                Documented Under the Act of Aug. 9, 1954]

  Subpart 68.05--Documentation of Certain Vessels for Oil Spill Cleanup

68.05-1  Purpose and scope.
68.05-3  Definitions for purposes of this subpart.
68.05-5  Citizenship requirements for limited coastwise endorsement.
68.05-7  Vessel eligibility requirements for limited coastwise 
          endorsement.
68.05-9  Privileges of a limited coastwise endorsement.
68.05-11  Application to document a vessel under this subpart.
68.05-13  Cessation of qualifications.

Appendix A to Subpart 68.05--Oath for Qualification of a Not-For-Profit 
          Oil Spill Response Cooperative
Appendix B to Subpart 68.05--Oath for Documentation of Vessels for Use 
          by a Not-for-Profit Oil Spill Response Cooperative

    Authority: 46 U.S.C. 2103; 49 CFR 1.46. Subpart 68.01 also issued 
under 46 U.S.C. App. 876; subpart 68.05 also issued under 46 U.S.C. 
12106(d).

    Source: CGD 80-107, 47 FR 27511, June 24, 1982, unless otherwise 
noted.

[[Page 363]]



Subpart 68.01--Regulations Implementing the Act of September 2, 1958 (46 
                              U.S.C. 883-1)



Sec. 68.01-1  Definitions for the purposes of this subpart.

    Act means the Act of September 2, 1958 (46 U.S.C. 883-1).
    883-1 citizen or 883-1 corporation means a corporation which 
qualifies for the special citizenship status created by the Act of 
September 2, 1958 (46 U.S.C. 883-1).
    Parent corporation means one incorporated under the laws of the 
United States, or any state, territory, or district of the United 
States, which controls (directly or indirectly) at least 50 percent of 
the voting stock of another corporation.
    Subsidiary corporation means one incorporated under the laws of the 
United States, or any state, territory, or district of the United 
States, which has not less than 50 percent of its voting stock 
controlled (directly or indirectly) by another corporation.



Sec. 68.01-3  Requirements for citizenship under 46 U.S.C. 883-1.

    A corporation seeking to establish its citizenship under the Act of 
September 2, 1958 (46 U.S.C. 883-1) must meet the following criteria as 
specified in the Act:
    (a) It must be incorporated under the laws of the United States, or 
any state, territory, district, or possession of the United States;
    (b) A majority of the officers and directors of the corporation must 
be citizens of the United States;
    (c) Not less than 90 percent of the employees of the corporation 
must be residents of the United States;
    (d) Such corporation must be engaged primarily in a manufacturing or 
mineral industry in the United States or any territory, district, or 
possession of the United States;
    (e) The aggregate book value of the vessels owned by the corporation 
must not exceed 10 percent of the aggregate book value of the assets of 
the corporation; and
    (f) The corporation must purchase or produce in the United States, 
its territories or possessions, not less than 75 percent of the raw 
materials used or sold in its operations.

    Note: A corporation which qualifies as an 883-1 citizen by meeting 
the criteria in paragraph (a) of this section is not thereby precluded 
from qualifying as a citizen under any definition in part 67 upon 
compliance with all applicable requirements.

[CGD 80-107, 47 FR 27494, June 24, 1982, as amended at 47 FR 35488, Aug. 
16, 1982]



Sec. 68.01-5  Qualification as an 883-1 corporation.

    (a) To be formally qualified as an 883-1 corporation for all 
purposes under the Act, a corporation which meets the requirements of 
Sec. 68.01-3 must file with the Manager, National Vessel Documentation 
Center a certificate under oath as described in appendix A.
    (b) Upon the filing of the certificate required under paragraph (a) 
of this section, the Manager, National Vessel Documentation Center will 
furnish the corporation a Certificate of Compliance which is valid for a 
period of 3 years from the date of its issuance, unless there is a 
change in corporate status requiring a report under Sec. 68.01-9(a) of 
this subpart. On or before the date of expiration of the Certificate of 
Compliance, a new certificate under oath as described in appendix A must 
be filed with the Commandant.

(Approved by the Office of Management and Budget under control number 
2115-0110)

[GCD 89-007; GCD 89-007a, 58 FR 60266, Nov. 15, 1993, 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 68.01-7  Qualification as a parent or subsidiary.

    (a) To be formally qualified as a parent corporation, as defined in 
Sec. 68.01-1, a corporation must file with the Manager, National Vessel 
Documentation Center a certificate under oath as described in appendix 
B.
    (b) To be formally qualified as subsidiary corporation as defined in 
Sec. 68.01-1, a corporation must file with the Manager, National Vessel 
Documentation Center a certificate under oath as described in appendix 
B.
    (c) Upon the filing of the certificate required under paragraph (a) 
or (b) of this section, the Manager, National Vessel Documentation 
Center will furnish the corporation a certificate of

[[Page 364]]

parent or subsidiary status which is valid for a period of 3 years from 
the date of its issuance unless there is a change in corporate status 
requiring a report under Sec. 68.01-9(a) of this subpart. On or before 
the date of expiration of the certificate of parent or subsidiary 
status, a new certificate under oath as described in appendix B must be 
filed with the Commandant.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 68.01-9  Cessation of qualification.
    (a) If after filing the certificate required by Sec. 68.01-5 of this 
subpart, a change occurs whereby an 883-1 corporation no longer meets 
the criteria in Sec. 68.01-3(a), that corporation's qualification for 
the privileges enumerated in Secs. 68.01-11 and 68.01-13 is terminated 
effective as of the date and time of the change. The corporation must 
report the change in writing to the Manager, National Vessel 
Documentation Center.
    (b) If, after filing the certificate required by Sec. 68.01-7 of 
this subpart, a change occurs whereby the corporation is no longer 
entitled to be deemed a parent or subsidiary corporation, that 
corporation's qualification for the privileges in Sec. 68.01-11 and 13 
is terminated effective as of the date and time of the change. The 
corporation must report such change in writing to the Manager, National 
Vessel Documentation Center.

[CGD 89-007, CGD 89-007a, 58 FR 60266, Nov. 15, 1993; 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31605, June 15, 1995]



Sec. 68.01-11  Privileges conferred--documentation of vessel.
    The special citizenship status created by the Act entitles the 883-1 
corporation to document certain vessels for certain limited purposes:
    (a) An 883-1 corporation may document under the Act only vessels 
which are qualified for employment in the coastwise trade and which are 
either non-self propelled or, if self-propelled, are of less than 500 
gross tons.
    (b) A vessel owned by an 883-1 corporation and meeting the criteria 
in paragraph (a) of this section may be documented only for use in the 
coastwise trade subject to the restrictions in Sec. 68.01-15.
    (c) Section 68.01-17 contains details concerning the documentation 
of vessels by an 883-1 corporation.


Sec. 68.01-13  Privileges conferred--operation of vessels.

    (a) The special citizenship status created by the Act entitles the 
883-1 corporation to operate, subject to the restrictions in Sec. 68.01-
15, vessels which are qualified to engage in the coastwise trade and are 
exempt from documentation. (See Sec. 67.01-7 for classes of exempt 
vessels.)
    (b) Vessels, documented or exempt from documentation, employed 
subject to the Act may carry passengers and merchandise of the 883-1 
corporation owning such vessels only between points in the United 
States, including territories, districts, and possessions thereof 
embraced in the coastwise laws.
    (c) The special citizenship status created by the Act entitles an 
883-1 corporation owning vessels as described in paragraphs (a) and (b) 
of this section to transport merchandise or passengers for hire in the 
coastwise trade as a service for a duly qualified parent or subsidiary 
corporation as defined in Sec. 68.01-1.
    (d) The special citizenship status created by the Act entitles an 
883-1 corporation owning vessels as described in paragraphs (a) and (b) 
of this section to demise or bareboat charter such vessels to common or 
contract carriers subject to the restrictions in Sec. 68.01-15(c).


Sec. 68.01-15  Restrictions.

    (a) Vessels employed subject to the Act are entitled to operation 
only in the coastwise trade and only to the extent described in 
paragraphs (b) and/or (c) of this section.
    (b) A vessel owned by an 883-1 corporation may engage in coastwise 
transportation for hire as a service to a parent or subsidiary 
corporation as defined in Sec. 68.01-1. Such transportation for hire 
must be between points of the United States, including territories, 
districts, and possessions thereof embraced in the coastwise laws.
    (c) A vessel owned by an 883-1 corporation may be operated under 
demise or bareboat charter to a common or a

[[Page 365]]

contract carrier subject to 49 U.S.C. Chapter 12 which is a citizen as 
defined in 46 U.S.C. 802.
    (1) Such common or contract carrier may not be connected either 
directly or indirectly by ownership or control with the 883-1 
corporation.
    (2) The demise or bareboat charter must be at prevailing rates.
    (3) The vessels under a demise or bareboat charter may not be used 
in non-contiguous trade.



Sec. 68.01-17  Application by an 883-1 corporation to document a vessel.

    (a) An application by an 883-1 corporation to document a vessel must 
comply with the applicable requirements in subparts A, D, E, F, G, H, I, 
K, and L of part 67 of this chapter.
    (b) An application by an 883-1 corporation to document a vessel must 
include a copy of the Certificate of Compliance issued under Sec. 68.01-
5.

[CGD 95-014, 60 FR 31606, June 15, 1995]

Appendix A to Subpart 68.01--Oath for Qualification of Corporation as a 
  Citizen of the United States Under the Act of September 2, 1958 (46 
                              U.S.C. 883-1)

             Department of Transportation, U.S. Coast Guard

Oath for Qualification of Corporation as a Citizen of the United States 
          Under the Act of September 2, 1958 (46 U.S.C. 883-1)

Corporation:
  Name__________________________________________________________________
  Address 1________________________________________________________
---------------------------------------------------------------------------

    1 Show principal place of business of corporation.
---------------------------------------------------------------------------

  State where incorporated______________________________________________
Affiant:
  Name__________________________________________________________________
  Address_______________________________________________________________
  Company_______________________________________________________________
  Title or capacity_____________________________________________________

    I, the affiant named above, swear that I am legally authorized to 
make this oath on behalf of the corporation, that a majority of the 
officers and directors of the above-named corporation are citizens of 
the United States, as shown by the attached listing incorporated in and 
made a part of this oath which truly and correctly names all such 
officers and directors, giving the home address and citizenship of each; 
that not less than 90 percent of the employees of the corporation are 
residents of the United States; that the corporation is engaged 
primarily in a manufacturing or mineral industry in the United States or 
in a territory, district or possession thereof; that the aggregate book 
value of the vessels owned by the corporation does not exceed 10 percent 
of the aggregate book value of the assets of the corporation; and that 
the corporation purchases or produces in the United States, its 
territories or possessions not less than 75 percent of the raw materials 
used or sold in its operation.2
---------------------------------------------------------------------------

    2 Attach the required list of the names of all officers and 
directors of the corporation, giving the home address and citizenship of 
each.
---------------------------------------------------------------------------

    The above named corporation fails to qualify as a citizen within the 
meaning of Sec. 67.03-9(b) by reason of: 3
---------------------------------------------------------------------------

    3 Check appropriate line or lines.
---------------------------------------------------------------------------

------Non-citizen President
------Non-citizen Chairman of Board
------Failure to meet quorum requirements
------Failure to meet stock ownership requirements
Signature_______________________________________________________________
    Subscribed and sworn to before me on the day and year shown
_______________________________________________________________________
_______________________________________________________________________
(Notary Public)
Date____________________________________________________________________

 Appendix B to Subpart 68.01--Oath of Parent or Subsidiary Corporation 
               Act of Aeptember 2, 1958 (46 U.S.C. 883-1)

             Department of Transportation, U.S. Coast Guard

 Oath of Parent or Subsidiary Corporation, Act of September 2, 1958 (46 
                              U.S.C. 883-1)

Corporation:
  Name__________________________________________________________________
  Address_______________________________________________________________
  State of incorporation________________________________________________
    Status (Parent) 1 -------- (Subsidiary) 2 --------
---------------------------------------------------------------------------

    1 A ``parent corporation'' for the purposes of this oath is one 
incorporated under the laws of the United States, or any State, 
territory, or district of the United States, which controls (directly or 
indirectly) at least 50 percent of the voting stock of another 
corporation. Strike out the inapplicable term.
    2 A ``subsidiary corporation'' for the purposes of this oath is 
one incorporated under the laws of the United States, or any State, 
territory, or district of the United States, which has not less than 50 
percent of its voting stock controlled (directly or indirectly) by 
another corporation. Strike out the inapplicable term.
---------------------------------------------------------------------------

Name of associated corporation__________________________________________

[[Page 366]]

  Address_______________________________________________________________
  State where incorporated______________________________________________
Affiant:
  Name__________________________________________________________________
  Address_______________________________________________________________
  Company_______________________________________________________________
  Title or capacity_____________________________________________________

    I, the affiant named above, swear that the corporation first named 
herein is the (parent) 1 (subsidiary) 2 of the associated 
corporation named, that I am the duly authorized officer or agent of the 
corporation first named, and that the associated corporation has 
previously established that it is a citizen within the meaning of the 
Act of September 2, 1958 (46 U.S.C. 883-1).
Signature_______________________________________________________________
    Subscribed and sworn to before me on the day and year shown
_______________________________________________________________________
(Notary Public)



   Subpart 68.03--[Reserved for Regulation, as Necessary, of Vessels 
               Documented Under the Act of August 9, 1954]



  Subpart 68.05--Documentation of Certain Vessels for Oil Spill Cleanup

    Source: CGD 90-055, 57 FR 7642, Mar. 3, 1992, unless otherwise 
noted.



Sec. 68.05-1  Purpose and scope.

    This Subpart contains citizen ownership requirements and procedures 
to allow documentation of vessels which do not meet the requirements of 
part 67 of this chapter. The requirements are for the limited purposes 
of training for, implementing, and supporting oil spill cleanup 
operations.



Sec. 68.05-3  Definitions for purposes of this subpart.

    Certificate of Documentation means form CG-1270.
    Citizen means a citizen as described in part 67 of this chapter.
    Exclusive Economic Zone or EEZ means the exclusive economic zone 
established by Presidential Proclamation Numbered 5030, dated March 10, 
1983, including the ocean waters of the areas referred to as ``eastern 
special areas'' in Article 3(1) of the Agreement between the United 
States of America and the Union of Soviet Socialist Republics on the 
Maritime Boundary, signed June 1, 1990.
    Not-for-profit oil spill response cooperative means a corporation, 
partnership, association, trust, joint venture, or other entity 
established under the laws of the United States, or of a State, with a 
not-for-profit status and for the limited purposes of training for, 
carrying out, and supporting oil spill cleanup operations or related 
research activities.



Sec. 68.05-5  Citizenship requirements for limited coastwise endorsement.

    (a) Notwithstanding the citizenship requirements set out in part 67 
of this chapter, a Certificate of Documentation with a coastwise 
endorsement for the limited purposes provided in Sec. 68.05-9 may be 
issued to a vessel owned by--
    (1) A not-for-profit oil spill response cooperative if the vessel 
meets the requirements of paragraph (b) of this section; or
    (2) A member or members of a not-for-profit oil spill response 
cooperative if the vessel meets the requirements of paragraphs (b) and 
(c) of this section.
    (b) The vessel must be at least 50 percent owned by one or more of 
the following entities:
    (1) An individual who is a native-born, naturalized or derivative 
citizen of the United States or otherwise qualifies as a United States 
citizen.
    (2) A corporation incorporated under the laws of the United States 
or of a State where--
    (i) The president and, if the president is not the chief executive 
officer, the chief executive officer, by whatever title, is a citizen;
    (ii) The chairman of the board of directors is a citizen; and
    (iii) No more of the directors are non-citizens than a minority of 
the number necessary to constitute a quorum.
    (3) A partnership where all the general partners are citizens and at 
least 50 percent of the equity interest is owned by citizens.
    (4) An association or joint venture where all the members are 
citizens.
    (5) A trust where all the trustees and all the beneficiaries with an 
enforceable interest in the trust are citizens.
    (c) The vessel must be owned by a member or members of a not-for-
profit

[[Page 367]]

oil spill response cooperative who dedicate the vessel to the use of a 
not-for-profit oil spill response cooperative.
    (d) A vessel which meets the criteria of this section is considered 
to be owned exclusively by citizens of the United States for the 
purposes of subsequent transfer and documentation under part 67 of this 
chapter.



Sec. 68.05-7  Vessel eligibility requirements for limited coastwise endorsement.

    (a) A vessel must comply with all the requirements of part 67 of 
this chapter, other than citizenship requirements, in order to be 
eligible for documentation under this subpart.
    (b) Notwithstanding 46 U.S.C. App. 883, a vessel remains eligible 
for documentation under this subpart even if the vessel was formerly 
owned by a not-for-profit oil spill response cooperative or by one or 
more members of a not-for-profit oil spill response cooperative and the 
vessel meets the criteria of Sec. 68.05-5.



Sec. 68.05-9  Privileges of a limited coastwise endorsement.

    (a) A vessel which is documented and issued a limited coastwise 
endorsement under this subpart may operate on the navigable waters of 
the United States or in the EEZ in coastwise trade only for the 
following purposes:
    (1) To recover oil discharged into the water.
    (2) To transport oil discharged into the water.
    (3) To transport and deploy equipment, supplies, and personnel for 
recovering and transporting oil discharged into the water.
    (4) To conduct training exercises to prepare for performing the 
functions in paragraphs (a)(1) through (a)(3) of this section.
    (b) This limited coastwise endorsement also entitles the vessel to 
any other employment for which a registry, fishery, or Great Lakes 
license is not required.
    (c) A vessel which is documented and issued a limited coastwise 
endorsement under this subpart may qualify to operate for other purposes 
by meeting the applicable requirements of part 67 of this chapter.



Sec. 68.05-11  Application to document a vessel under this subpart.

    (a) To qualify to document a vessel or to accept the dedication of a 
vessel by a member or members under this subpart, a not-for-profit oil 
spill response cooperative shall file with the Manager, National Vessel 
Documentation Center the certificate under oath as set forth in Appendix 
A to this subpart.
    (b) Upon the filing of the certificate under paragraph (a) of this 
section, the Manager, National Vessel Documentation Center will furnish 
the not-for-profit oil spill response cooperative with a letter of 
qualification. The letter of qualification is valid for a period of 
three years from the date of its issuance, unless there is a change in 
membership or structure of the not-for-profit oil spill response 
cooperative or a change in the citizenship status of any of its members 
requiring a report under Sec. 68.05-13. In order to renew the letter of 
qualification, a new certificate under oath must be filed with the 
Commandant at least 30 days before the date of expiration of the letter 
of qualification.
    (c) A not-for-profit oil spill response cooperative seeking to 
document a vessel for a limited coastwise endorsement under this 
subpart, in addition to complying with the requirements of Sec. 68.05-
7(a), shall supply to the National Vessel Documentation Center, a copy 
of the letter of qualification issued under paragraph (b) of this 
section.
    (d) A member or members of a not-for-profit oil spill response 
cooperative seeking to document a vessel under this subpart shall supply 
to the National Vessel Documentation Center, a copy of the letter of 
qualification issued under paragraph (b) of this section to the not-for-
profit oil spill response cooperative to which the vessel is dedicated. 
In addition, the not-for-profit oil spill response cooperative and the 
vessel owners shall all certify under oath that the vessel for which 
application is made is dedicated to use by the not-for-profit oil spill 
response cooperative. This certification must use the format and content 
described in appendix B to this subpart. If there is a change in the 
dedicated status of the vessel or its

[[Page 368]]

ownership, a report under Sec. 68.05-13 must be filed.

[GCD 89-007; GCD 89-007a, 58 FR 60266, Nov. 15, 1993, 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31606, June 15, 1995]



Sec. 68.05-13  Cessation of qualifications.

    (a) If the vessel is owned by a not-for-profit oil spill response 
cooperative and a change occurs which affects the validity of the 
certificate required by Sec. 68.05-11(a), or the ownership of the vessel 
changes so that it no longer meets the criteria of Sec. 68.05-5, the 
qualification for the privileges enumerated in Sec. 68.05-9 is 
terminated effective as of the date and time of the change. The not-for-
profit oil spill response cooperative shall report the change in writing 
to the Manager, National Vessel Documentation Center.
    (b) If the vessel is owned by a member or members of a not-for-
profit oil spill response cooperative and a change occurs which affects 
the validity of the certificate required by Sec. 68.05-11(a), or the 
ownership of the vessel changes so that it no longer meets the criteria 
of Sec. 68.05-5, the qualification of the member or members for the 
privileges enumerated in Sec. 68.05-9 is terminated effective as of the 
date and time of the change. The member or members shall report the 
change in writing to the Manager, National Vessel Documentation Center.
    (c) When qualifications are terminated under this section, the 
certificate of documentation issued under this subpart must be 
surrendered or exchanged in accordance with part 67 of this chapter.

[GCD 89-007; GCD 89-007a, 58 FR 60266, Nov. 15, 1993, 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31606, June 15, 1995]

Appendix A to Subpart 68.05--Oath for Qualification of a Not-For-Profit 
                     Oil Spill Response Cooperative

             Department of Transportation, U.S. Coast Guard

     Oath for Qualification of a Not-For-Profit Oil Spill Response 
                    Cooperative [46 U.S.C. 12106(d)]

Cooperative:

Name____________________________________________________________________

Address_________________________________________________________________

Jurisdiction where incorporated or organized____________________________
_______________________________________________________________________

Affiant:

Name____________________________________________________________________

Address_________________________________________________________________

Cooperative_____________________________________________________________

Title or Capacity_______________________________________________________
    I, the affiant, swear that I am legally authorized to make this oath 
and hold the capacity so bestowed upon me as ________, on behalf of the 
______________ cooperative and its members, that it is a not-for-profit 
cooperative, and that it is engaged in training for, carrying out, or 
supporting oil spill cleanup operations or related research activities.
    That all members of the cooperative who may use the letter of 
qualification issued to this cooperative are truly and correctly named, 
including home address and citizenship of each on the attached listing 
incorporated in and made a part of this oath.

Signature_______________________________________________________________

Subscribed and sworn to before me on the day and year shown.

_______________________________________________________________________
(Notary Public)

Date____________________________________________________________________

 Appendix B to Subpart 68.05--Oath for Documentation of Vessels for Use 
           by a Not-For-Profit Oil Spill Response Cooperative

             Department of Transportation, U.S. Coast Guard

Oath for Documentation of Vessels For Use by a Not-For-Profit Oil Spill 
                Response Cooperative [46 U.S.C. 12106(d)]

Cooperative:

Name____________________________________________________________________

Address_________________________________________________________________

Jurisdiction where incorporated or organized____________________________
_______________________________________________________________________
    I, the undersigned officer of __________, a not-for-profit oil spill 
response cooperative, swear that I am legally authorized to make this 
oath on behalf of the cooperative, and its members and that the 
cooperative has accepted the vessel __________.

I/we __________, am/are the owner(s) of the vessel. I/we further swear 
that the vessel has been dedicated to the exclusive use of the 
cooperative for the purpose of training for, carrying out, or supporting 
oil spill cleanup operations or related research activities for 
discharges of oil into the navigable waters of the United States and the 
Exclusive Economic Zone and that the cooperative has accepted the 
vessel.

[[Page 369]]

    For the Cooperative:

Name____________________________________________________________________

Address_________________________________________________________________

Cooperative_____________________________________________________________

Title or Capacity_______________________________________________________
    For Each Vessel Owner:

Name____________________________________________________________________

Cooperative_____________________________________________________________

Title or Capacity_______________________________________________________

    Subscribed and sworn to before me on the day and year shown.

_______________________________________________________________________
(Notary Public)

Date____________________________________________________________________



PART 69--MEASUREMENT OF VESSELS--Table of Contents




                           Subpart A--General

Sec.
69.1  Purpose.
69.3  Applicability.
69.5  Vessels required or eligible to be measured.
69.7  Vessels transiting the Panama and Suez Canals.
69.9  Definitions.
69.11  Determining the measurement system or systems for a particular 
          vessel.
69.13  Deviating from the provisions of a measurement system.
69.15  Organizations authorized to measure vessels.
69.17  Application for measurement services.
69.19  Remeasurement and adjustment of tonnage.
69.21  Right of Appeal.
69.23  Fees.
69.25  Penalties.
69.27  Delegation of authority to measure vessels.
69.29  OMB control numbers assigned under the Paperwork Reduction Act.

                Subpart B--Convention Measurement System

69.51  Purpose.
69.53  Definitions.
69.55  Application for measurement services.
69.57  Gross tonnage.
69.59  Enclosed spaces.
69.61  Excluded spaces.
69.63  Net tonnage.
69.65  Calculation of volumes.
69.67  Marking of cargo spaces.
69.69  Issuance of an International Tonnage Certificate (1969).
69.71  Change of net tonnage.
69.73  Variance from the prescribed method of measurement.
69.75  Figures.

                 Subpart C--Standard Measurement System

69.101  Purpose.
69.103  Definitions.
69.105  Application for measurement services.
69.107  Gross and net tonnages.
69.109  Under-deck tonnage.
69.111  Between-deck tonnage.
69.113  Superstructure tonnage.
69.115  Excess hatchway tonnage.
69.117  Spaces exempt from inclusion in gross tonnage.
69.119  Spaces deducted from gross tonnage.
69.121  Engine room deduction.
69.123  Figures.

                   Subpart D--Dual Measurement System

69.151  Purpose.
69.153  Application of other laws.
69.155  Measurement requirements.
69.157  Definitions.
69.159  Application for measurement services.
69.161  Gross and net tonnages.
69.163  Under-deck tonnage.
69.165  Between-deck tonnage.
69.167  Superstructure tonnage.
69.169  Spaces exempt from inclusion in gross tonnage.
69.171  When the tonnage mark is considered submerged.
69.173  Tonnage assignments for vessels with only one deck.
69.175  Tonnage assignments for vessels with a second deck.
69.177  Markings.
69.179  Certification of markings.
69.181  Locating the line of the second deck.
69.183  Figures.

                Subpart E--Simplified Measurement System

69.201  Purpose.
69.203  Definitions.
69.205  Application for measurement services.
69.207  Measurements.
69.209  Calculation of tonnages.

    Authority: 46 U.S.C. 2301, 14103; 49 CFR 1.46.

    Source: CGD 87-015b, 54 FR 37657, Sept. 12, 1989, unless otherwise 
noted.



                           Subpart A--General



Sec. 69.1  Purpose.

    This part implements legislation concerning the measurement of 
vessels to determine their tonnage (part J of 46 U.S.C. subtitle II). 
Tonnages are required before a vessel may be documented as a vessel of 
the United States. Also, tonnages are used to

[[Page 370]]

apply commercial vessel safety regulations based on tonnage, to meet the 
requirements of the International Convention on Tonnage Measurement of 
Ships, 1969, and to determine Federal and State regulatory fees and 
private operational charges based on tonnage. Tonnages are determined by 
the physical measurement of a vessel (Convention, Standard, and Dual 
Measurement Systems) or by application of a formula based on the 
vessel's dimensions provided by the owner (Simplified Measurement 
System). This part indicates the particular measurement system or 
systems under which the vessel is required or eligible to be measured, 
describes the application and measurement procedures for each system, 
identifies the organizations authorized to measure vessels under this 
part, and provides for the appeal of measurement organizations' 
decisions.



Sec. 69.3  Applicability.

    This part applies to vessels of the United States over five net tons 
(as that tonnage is determined under this part) which are required or 
eligible to be measured under this part, a Federal law, or an 
international agreement or which are subject to a Federal law or 
international agreement based on the vessel's tonnage.



Sec. 69.5  Vessels required or eligible to be measured.

    (a) The following vessels (including public vessels) are required to 
be measured under this part:
    (1) Vessels that are to be documented as a vessel of the United 
States.
    (2) Vessels of 79 feet or more in overall length that engage on a 
foreign voyage.
    (3) Vessels subject to a Federal law or regulation based on vessel 
tonnage.
    (4) Vessels determined by the Commandant to require measurement 
under this part.
    (b) The following vessels are not required to be measured under this 
part but are eligible to be measured, if the owner requests:
    (1) Public vessels that are not to be documented and will not engage 
on a foreign voyage.
    (2) Vessels of war.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989, as amended by CGD 92-058, 57 
FR 59938, Dec. 17, 1992]



Sec. 69.7  Vessels transiting the Panama and Suez Canals.

    (a) All vessels intending to transit the Panama Canal, other than 
vessels of war, must be measured and certificated under the system 
prescribed in 35 CFR part 135.
    (b) All vessels intending to transit the Suez Canal must be measured 
and certificated under the Arab Republic of Egypt Suez Canal Authority 
Rules of Navigation, part IV.
    (c) Panama Canal and Suez Canal tonnage certificates are in addition 
to tonnage certificates issued under this part.
    (d) Tonnage measurement services for Panama Canal and Suez Canal 
certificates are provided by measurement organizations authorized by the 
respective canal authority.



Sec. 69.9  Definitions.

    As used in this part--
    Commandant means Commandant of the Coast Guard at the following 
address: Commanding Officer, Marine Safety Center, 400 7th Street, SW., 
Washington, DC 20590-0001.
    Convention means the International Convention on Tonnage Measurement 
of Ships, 1969.
    Convention Measurement System means the system under subpart B of 
this part.
    Dual Measurement System means the system under subpart D of this 
part.
    Great Lakes means the Great Lakes of North America and the St. 
Lawrence River west of a rhumb line drawn from Cap des Rosiers to West 
Point, Anticosti Island, and, on the north side of Anticosti Island, the 
meridian of longitude 63 degrees west.
    Gross tonnage means a vessel's approximate volume. Under the 
Convention Measurement System, it means the total volume of all enclosed 
spaces modified by a coefficient. Under the Standard and Dual 
Measurement Systems, it means the total volume of all enclosed spaces 
less certain exempt spaces. Under the Simplified Measurement Systems, it 
means the product of

[[Page 371]]

a vessel's length, depth, and breadth modified by a coefficient.
    National Vessel Documentation Center means the organizational unit 
designated by the Commandant to process vessel documentation 
transactions and maintain vessel documentation records. The address can 
be found in Sec. 67.3 of this subchapter.
    Net tonnage means a measure of a vessel's earning capacity. Under 
the Convention Measurement System, it means the volume of the actual 
cargo and passenger spaces modified by a formula based on the vessel's 
volume. Under the Standard and Dual Measurement Systems, it means the 
gross tonnage less certain deducted spaces. Under the Simplified 
Measurement System, it means the gross tonnage modified by a 
coefficient.
    Overall length means the horizontal distance between the foremost 
part of a vessel's stem to the aftermost part of its stern, excluding 
fittings and attachments.
    Simplified Measurement System means the system under subpart E of 
this part.
    Standard Measurement System means the system under subpart C of this 
part.
    Tonnage means the volume of a vessel's enclosed spaces as calculated 
under a measurement system in this part. Tonnage calculated under the 
Standard, Dual, or Simplified Measurement System is based on tons of 100 
cubic feet each. Tonnage calculated under the Convention Measurement 
System is based on tons of 100 cubic feet modified by a logarithmic 
function.
    Vessel engaged on a foreign voyage means a vessel--
    (a) Arriving at a place under the jurisdiction of the United States 
from a place in a foreign country;
    (b) Making a voyage between places outside of the United States;
    (c) Departing from a place under the jurisdiction of the United 
States for a place in a foreign country; or
    (d) Making a voyage between a place within a territory or possession 
of the United States and another place under the jurisdiction of the 
United States not within that territory or possession.
    Vessel of war means ``vessel of war'' as defined in 46 U.S.C. 2101.

[GCD 89-007; GCD 89-007a, 58 FR 60266, Nov. 15, 1993, 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31606, June 15, 1995; CGD 95-
072, 60 FR 50463, Sept. 29, 1995; 60 FR 54106, Oct. 19, 1995; CGD 96-
041, 61 FR 50728, Sept. 27, 1996]



Sec. 69.11  Determining the measurement system or systems for a particular vessel.

    (a) Convention Measurement System (subpart B). (1) Except as 
otherwise provided in this section, this system applies to a vessel 
documented or to be documented under part 67 of this chapter and to a 
vessel engaged on a foreign voyage.
    (2) This system does not apply to the following vessels:
    (i) A vessel of less than 79 feet in overall length.
    (ii) A vessel operating only on the Great Lakes, unless the owner 
requests measurement under this system.
    (iii) A vessel that is not engaged on a foreign voyage and that had 
its keel laid or was at a similar stage of construction before January 
1, 1986, unless the owner requests measurement under the Convention 
Measurement System or unless, on or after January 1, 1986, the vessel 
undergoes a change that the Commandant finds substantially affects the 
vessel's gross tonnage.
    (iv) Before July 19, 1994, a vessel the keel of which was laid or 
that was at a similar stage of construction before July 18, 1982, unless 
the owner requests or unless, on or after July 18, 1982, the vessel 
undergoes a change that the Commandant finds substantially affects the 
vessel's gross tonnage.
    (v) A vessel of war.
    (vi) A non-self-propelled vessel not engaged on a foreign voyage, 
unless the owner requests measurement under this system.
    (3) A vessel made subject to this system at the request of the owner 
may be remeasured only under this system.
    (4) For the purpose of vessel documentation, a vessel measured under 
this system is not required to be measured under another system.
    (5) After July 18, 1994, a vessel the keel of which was laid or that 
was at a similar stage of construction before July 18, 1982, (except a 
vessel measured

[[Page 372]]

under this system at the request of the owner or because of a change 
that substantially affects the vessel's gross tonnage) may retain its 
tonnage in effect on July 18, 1994, for the application of relevant 
requirements under an international agreement (except the Convention) or 
other laws of the United States. However, if the vessel undergoes a 
change after July 18, 1994, that the Commandant finds substantially 
affects the vessel's gross tonnage, the vessel must be remeasured only 
under this system.
    (6) A tonnage assignment under this system does not affect the 
applicability to the vessel of international agreements to which the 
United States Government is a party that are not in conflict with the 
Convention or with the application of International Maritime 
Organization (IMO) Resolutions A.494(XII) of November 19, 1981, 
A.540(XIII) of November 17, 1983, and A.541(XIII) of November 17, 1983. 
When applicable to the vessel, these Resolutions provide interim schemes 
for using the vessel's existing gross tonnage, instead of the gross 
tonnage under the Convention Measurement System, for applying the 
International Convention for the Safety of Life at Sea (SOLAS), the 
International Convention on Standards of Training, Certification, and 
Watchkeeping for Seafarers, 1978, (STCW), and the International 
Convention for the Prevention of Pollution from Ships, 1973, (MARPOL), 
respectively.
    (b) Standard Measurement System (subpart C). This system applies to 
a vessel not required to be measured under the Convention Measurement 
System if the vessel is to be documented or if the application of a law 
of the United States to the vessel depends on the vessel's tonnage. Upon 
request of the owner, this system also applies to a documented vessel 
measured under the Convention Measurement System when Standard 
Measurement System tonnages are to be used in applying the provisions of 
a law under 46 U.S.C. 14305.
    (c) Dual Measurement System (subpart D). This system may be applied, 
at the owner's option, instead of the Standard Measurement System, to a 
vessel eligible or required to be measured under the Standard 
Measurement System.
    (d) Simplified Measurement System (subpart E). This system may be 
applied, at the owner's option, instead of the Standard Measurement 
System to the following vessels:
    (1) A vessel that is under 79 feet in overall length.
    (2) A vessel of any length that is non-self-propelled and not 
engaged on a foreign voyage.
    (3) A vessel of any length that is operated only for pleasure and 
operated only on the Great Lakes.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989, as amended by CGD 92-058, 57 
FR 59938, Dec. 17, 1992]



Sec. 69.13  Deviating from the provisions of a measurement system.

    (a) In measuring a vessel under a measurement system in this part, 
all provisions of that system applicable to the vessel must be observed.
    (b) The provisions of more than one measurement system may not be 
applied interchangeably or combined.



Sec. 69.15  Organizations authorized to measure vessels.

    (a) Except as under paragraphs (c) and (d) of this section, all U.S. 
vessels to be measured or remeasured under the Convention, Standard, or 
Dual Measurement Systems must be measured by the American Bureau of 
Shipping (ABS Americas) or Det Norske Veritas (DNV/USA). Applications 
for measurement must be directed to ABS Americas, 16855 Northchase 
Drive, Houston, TX 77060-6008, (713) 874-6416, or to Det Norske Veritas 
Classification (USA) Inc., 70 Grand Avenue, River Edge, NJ 07661, (201) 
488-0112.
    (b) All vessels to be measured or remeasured under the Simplified 
Measurement System must be measured by the Coast Guard. Applications for 
measurement under the Simplified Measurement System are obtainable from 
the National Vessel Documentation Center.
    (c) All U.S. Coast Guard vessels and all U.S. Navy vessels of war to 
be measured or remeasured under any measurement system must be measured 
by the Coast Guard.

[[Page 373]]

    (d) At the option of the Commandant, the Coast Guard may measure any 
vessel to determine its tonnage.
    (e) The appropriate certificate of measurement is issued by the 
measuring organization as evidence of the vessel's measurement under 
this part.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989, as amended by CGD 92-058, 57 
FR 59938, Dec. 17, 1992; CGD 92-053, 59 FR 50508, Oct. 4, 1994; CGD 95-
014, 60 FR 31606, June 15, 1995]



Sec. 69.17  Application for measurement services.

    (a) Applications for measurement are available from and, once 
completed, are submitted to the measurement organization listed in 
Sec. 69.15 that will perform the service. The contents of the 
application are described in this part under the requirements for each 
system.
    (b) Applications for measurement under more than one system may be 
combined.
    (c) For vessels under construction, the application must be 
submitted before the vessel is advanced in construction. Usually, this 
means as soon as the decks are laid, holds cleared of encumbrances, 
engine and boilers installed, and accommodations partitioned.



Sec. 69.19  Remeasurement and adjustment of tonnage.

    (a) If a vessel that is already measured is to undergo a structural 
alteration or if the use of a space within that vessel is to be changed, 
a remeasurement may be required. Vessel owners shall report immediately 
to a measurement organization listed in Sec. 69.15 any intent to 
structurally alter the vessel or to change the use of a space within the 
vessel. The organization advises the owner if remeasurement is 
necessary. Spaces not affected by the alteration or change need not be 
remeasured.
    (b) When there is a perceived error in the application of a 
regulation or in the tonnage calculations, the vessel owner should 
contact the responsible measurement organization. If the error is 
verified, the tonnage is adjusted as necessary.
    (c) If a remeasurement or adjustment of tonnage is required, the 
organization will issue a new tonnage certificate. If the vessel is 
documented, the vessel's owner must surrender the Certificate of 
Documentation as required under part 67, subpart 67.25, of this chapter.
    (d) A vessel of less than 79 feet in overall length measured under 
the Standard or Dual Measurement Systems may be remeasured at the 
owner's request under the Simplified Measurement System.



Sec. 69.21  Right of appeal.

    Any person directly affected by a decision or action taken under 
this part, by or on behalf of the Coast Guard, may appeal therefrom in 
accordance with subpart 1.03 of this chapter.

[CGD 88-033, 54 FR 50380, Dec. 6, 1989]



Sec. 69.23  Fees.

    Organizations listed in Sec. 69.15(a) are authorized to charge a fee 
for measurement services. Information on fees is available directly from 
the organizations.



Sec. 69.25  Penalties.

    (a) General violation. The owner, charterer, managing operator, 
agent, master, and individual in charge of a vessel in violation of a 
regulation in this part are each liable to the United States Government 
for a civil penalty of not more than $20,000. Each day of a continuing 
violation is a separate violation. The vessel also is liable in rem for 
the penalty.
    (b) False Statements. A person knowingly making a false statement or 
representation in a matter in which a statement or representation is 
required by this part is liable to the United States Government for a 
civil penalty of not more than $20,000 for each false statement or 
representation. The vessel also is liable in rem for the penalty.



Sec. 69.27  Delegation of authority to measure vessels.

    (a) Under 46 U.S.C. 14103 and 49 CFR 1.46, the Coast Guard is 
authorized to delegate to a ``qualified person'' the authority to 
measure vessels and to issue appropriate certificates of measurement for 
U.S. vessels that are required or eligible to be measured as vessels of 
the United States.

[[Page 374]]

    (b) Authority to measure and certify U.S. vessels under the 
Convention, Standard, and Dual Measurement Systems may be delegated to 
an organization that--
    (1) Is a full member of the International Association of 
Classification Societies (IACS);
    (2) Is incorporated under the laws of the United States, a State of 
the United States, or the District of Columbia;
    (3) Is capable of providing all measurement services under the 
Convention, Standard, and Dual Measurement Systems for vessels 
domestically and internationally;
    (4) Maintains a tonnage measurement staff that has practical 
experience in measuring U.S. vessels under the Convention, Standard, and 
Dual Measurement Systems; and
    (5) Enters into a Memorandum of Agreement, as described in paragraph 
(d) of this section.
    (c) Applications for delegation of authority under this section must 
be forwarded to the Commandant and include the following information on 
the organization:
    (1) Its name and address.
    (2) Its organizational rules and structure.
    (3) The location of its offices that are available to provide 
measurement services under the Convention, Standard, and Dual 
Measurement Systems.
    (4) The name, qualifications, experience, and job title of each 
full-time or part-time employee or independent contractor specifically 
designated by the organization to provide measurement services under the 
Convention, Standard, or Dual Measurement Systems.
    (5) Its tonnage measurement training procedures.
    (d) If, after reviewing the application, the Coast Guard determines 
that the organization is qualified to measure and certify U.S. vessels 
on behalf of the Coast Guard, the organization must enter into a 
Memorandum of Agreement with the Coast Guard which--
    (1) Defines the procedures for administering and implementing the 
tonnage measurement and certification processes, including the roles and 
responsibilities of each party;
    (2) Outlines the Coast Guard's oversight role;
    (3) Prohibits the organization from using an employee or contractor 
of the organization to measure and certify the tonnage of a vessel if 
that employee or contractor is acting or has acted as a tonnage 
consultant for that same vessel; and
    (4) Requires the organization to--
    (i) Accept all requests to perform delegated services without 
discrimination and without regard to the vessel's location, unless 
prohibited from doing so under the laws of the United States or under 
the laws of the jurisdiction in which the vessel is located;
    (ii) Physically inspect each vessel before issuing a tonnage 
certificate;
    (iii) Provide the Coast Guard with current schedules of measurement 
fees and related charges;
    (iv) Maintain a tonnage measurement file for each U.S. vessel that 
the organization measures and permit access to the file by any person 
authorized by the Commandant;
    (v) Permit observer status representation by the Coast Guard at all 
formal discussions that may take place between the organization and 
other vessel tonnage measurement organizations pertaining to tonnage 
measurement of U.S. vessels or to the systems under which U.S. vessels 
are measured;
    (vi) Comply with and apply all laws and regulations relating to 
tonnage measurement of U.S. vessels within the scope of authority 
delegated; and
    (vii) Comply with all other provisions, if any, of the Memorandum of 
Agreement.
    (e) Upon delegation of authority, the organization is listed in 
Sec. 69.15(a), Organizations authorized to measure vessels.



Sec. 69.29  OMB control numbers assigned under the Paperwork Reduction Act.

    (a) Purpose. This section collects and displays the control numbers 
assigned to information collection and record keeping requirements in 
this part by the Office of Management and Budget (OMB) pursuant to the 
Paperwork Reduction Act of 1980 (44 U.S.C. 3501 et seq.). The Coast 
Guard intends that this part comply with 44 U.S.C. 3507(f),

[[Page 375]]

which requires that agencies display the current control number assigned 
by the Director of OMB for each approved agency information collection 
requirement.
    (b) Display--

------------------------------------------------------------------------
                                                              Currently 
                                                               assigned 
                 Section of 46 CFR part 69                   OMB control
                                                                 No.    
------------------------------------------------------------------------
69.17......................................................    2115-0086
69.19......................................................    2115-0086
69.21......................................................    2115-0086
69.27......................................................    2115-0086
69.55......................................................    2115-0086
69.105.....................................................    2115-0086
69.121(d)..................................................    2115-0086
69.159.....................................................    2115-0086
69.179.....................................................    2115-0086
69.205.....................................................    2115-0086
------------------------------------------------------------------------



                Subpart B--Convention Measurement System



Sec. 69.51  Purpose.

    This subpart prescribes the requirements for measuring a vessel in 
order to comply with the International Convention on Tonnage Measurement 
of Ships, 1969 (Convention), and 46 U.S.C. chapter 143.



Sec. 69.53  Definitions.

    As used in this subpart--
    Amidships means the midpoint of the registered length, as 
``registered length'' is defined in this section.
    Cargo space means an enclosed space appropriated for the transport 
of cargo which is to be discharged from the vessel. The term does not 
include a space which qualifies as an excluded space under Sec. 69.61.
    Enclosed space is defined in Sec. 69.59.
    Excluded space is defined in Sec. 69.61.
    Gross tonnage or GT means the tonnage determined under Sec. 69.57.
    Line of the upper deck means a longitudinal line at the underside of 
the upper deck or, if that deck is stepped, the longitudinal line of the 
underside of the lowest portion of that deck parallel with the upper 
portions of that deck.
    Molded depth means the vertical distance amidships between the 
following points:
    (a) From the line of the upper deck at the vessel's side or, if the 
vessel has rounded gunwales, from the intersection of the line of the 
upper deck extended to the molded line of the shell plating as though 
the gunwales were of angular design.
    (b) To the top of the flat keel, to the lower edge of the keel 
rabbet if the vessel is of wood or composite structure, or to the point 
where the line of the flat of the bottom extended inward cuts the side 
of the keel if the vessel's lower part is hollow or has thick garboards.
    Molded draft means--
    (a) For vessels assigned a load line under parts 42, 44, 45, or 47 
of this chapter, the draft corresponding to the Summer Load Line (other 
than a timber load line);
    (b) For passenger vessels assigned a load line under part 46 of this 
chapter, the draft corresponding to the deepest subdivision load line 
assigned;
    (c) For vessels to which parts 42, 44, 45, 46, or 47 of this chapter 
do not apply but which otherwise have been assigned a load line, the 
draft corresponding to the Summer Load Line so assigned;
    (d) For vessels to which no load line has been assigned but the 
draft of which is restricted under any Coast Guard requirement, the 
maximum draft permitted under the restriction; and
    (e) For other vessels, 75 per cent of the molded depth.
    Net tonnage or NT means tonnage determined under Sec. 69.63.
    Passenger means a person on board a vessel other than--
    (a) The master, a member of the crew, or other person employed or 
engaged in any capacity in the business of the vessel; and
    (b) A child under one year of age.
    Registered breadth means the maximum breadth of a vessel measured 
amidships to the molded line of the frame in a vessel with a metal shell 
and to the outer surface of the hull in all other vessels.
    Registered length means either 96 percent of the length on a 
waterline at 85 percent of the least molded depth measured from the top 
of the flat keel or the length from the fore side of the stem to the 
axis of the rudder stock on that waterline, whichever is greater. In 
vessels designed with a rake of keel,

[[Page 376]]

this length is measured on a waterline parallel to the design waterline.
    Upper deck means the uppermost complete deck exposed to weather and 
sea, which has permanent means of weathertight closing of all openings 
in the weather part of the deck, and below which all openings in the 
sides of the vessel are fitted with permanent means of watertight 
closing.
    Weathertight means secure against penetration of water into the 
vessel in any sea condition.



Sec. 69.55  Application for measurement services.

    Applications for measurement under this subpart must include the 
following information and plans:
    (a) Type of vessel.
    (b) Vessel's name and official number (if assigned).
    (c) Builder's name and the vessel hull number assigned by builder.
    (d) Place and year built.
    (e) Date keel was laid.
    (f) Overall length, breadth, and depth of vessel.
    (g) Lines plan.
    (h) Booklet of offsets at stations.
    (i) Capacity plans for tanks and cargo compartments.
    (j) Hydrostatic curves.
    (k) Construction plans showing measurements and scantlings of deck 
structures, hatches, appendages, recesses, and other enclosed spaces.
    (l) Arrangement plans.

[GCD 89-007; GCD 89-007a, 58 FR 60266, Nov. 15, 1993, 58 FR 65131, Dec. 
13, 1993, as amended by CGD 95-014, 60 FR 31606, June 15, 1995]



Sec. 69.57  Gross tonnage.

    Gross tonnage (GT) is determined by the following formula 
GT=K1V, in which V=total volume of all enclosed spaces in cubic 
meters and K1=0.2+0.02 log10V.



Sec. 69.59  Enclosed spaces.

    Enclosed space means a space which is bounded by the vessel's hull, 
by fixed or portable partitions or bulkheads, or by decks or coverings 
other than permanent or movable awnings. No break in a deck, nor any 
opening in the vessel's hull, in a deck or in a covering of a space, or 
in the partitions or bulkheads of a space, nor the absence of a 
partition or bulkhead precludes the space from being included in the 
enclosed space.



Sec. 69.61  Excluded spaces.

    (a) Excluded space means an enclosed space which is excluded from 
volume (V) in calculating gross tonnage. Except as under paragraph (g) 
of this section, this section lists the excluded spaces.
    (b) A space that is within a structure and that is opposite an end 
opening extending from deck to deck (except for a curtain plate of a 
height not exceeding by more than one inch the depth of the adjoining 
deck beams) and having a breadth equal to or greater than 90 percent of 
the breadth of the deck at the line of the opening is an excluded space, 
subject to the following:
    (1) Only the space between the actual end opening and a line drawn 
parallel to the line or face of the opening at a distance from the 
opening equal to one-half of the breadth of the deck at the line of the 
opening is excluded. (See Sec. 69.75, figure 1.)
    (2) If, because of any arrangement (except convergence of the 
outside plating as shown in Sec. 69.75, figure 3), the breadth of the 
space is less than 90 percent of the breadth of the deck, only the space 
between the line of the opening and a parallel line drawn through the 
point where the athwartship breadth of the space is equal to 90 percent 
or less of the breadth of the deck is excluded. (See Sec. 69.75, figures 
2 and 4.)
    (3) When any two spaces, either of which is excluded under 
paragraphs (b)(1) or (b)(2) of this section, are separated by an area 
that is completely open except for bulwarks or open rails, these two 
spaces must not be excluded if the separation between the two spaces is 
less than the least half breadth of the deck in way of the separation. 
(See Sec. 69.75, figures 5 and 6.)
    (4) When the deck at the line of an opening has rounded gunwales, 
the breadth of the deck is the distance between the tangent points 
indicated in Sec. 69.75, figure 11.
    (c) A space that is open to the weather and that is under an 
overhead deck covering with no connection on the

[[Page 377]]

space's exposed sides between the covering and the deck other than the 
stanchions necessary for the covering's support is an excluded space. An 
open rail or bulwark fitted at the vessel's side does not disqualify the 
space from being an excluded space if the height between the top of the 
rail or bulwark and the overhead structure or curtain plate (if fitted) 
is not less than 2.5 feet or one-third of the height of the space, 
whichever is greater. (See Sec. 69.75, figure 7.)
    (d) A space in a side-to-side structure directly in way of opposite 
side openings not less than 2.5 feet in height or one-third of the 
height of the structure, whichever is greater, is an excluded space. If 
the opening is only on one side of the structure, the space to be 
excluded is limited inboard from the opening to a maximum of one-half of 
the breadth of the deck in way of the opening. (See Sec. 69.75, figure 
8.)
    (e) A space in a structure immediately below an uncovered opening in 
the deck overhead is an excluded space, if the opening is exposed to the 
weather and the space to be excluded is limited to the area of the 
opening. (See Sec. 69.75, figure 9.)
    (f) A recess in the boundary bulkhead of a structure which is 
exposed to the weather and which has an opening that extends from deck 
to deck without a means of closing is an excluded space, if the interior 
width of the space is not greater than the width of the opening and 
extension of the space into the structure is not greater than twice the 
width of the opening. (See Sec. 69.75, figure 10.)
    (g) Any space described in paragraphs (b) through (f) of this 
section which fulfills at least one of the following conditions is not 
an excluded space:
    (1) The space is fitted with shelves or other means designed for 
securing cargo or stores.
    (2) The opening that would otherwise permit the space to be excluded 
space is fitted with a means of closure.
    (3) Other features of the space make it possible for the space to be 
closed.



Sec. 69.63  Net tonnage.

    Net tonnage (NT) is determined by the formula:

    [GRAPHIC] [TIFF OMITTED] TC01FE91.038
    
in which:

Vc=total volume of cargo spaces in cubic meters.
K2=0.2+0.02 log10 Vc.
[GRAPHIC] [TIFF OMITTED] TC01FE91.039

D=molded depth amidships in meters, as ``molded depth'' is defined in 
          Sec. 69.53.
d=molded draft amidships in meters, as ``molded draft'' is defined in 
          Sec. 69.53.
N1=number of passengers in cabins with not more than eight berths, 
          as ``passenger'' is defined in Sec. 69.53.
N2=number of other passengers, as ``passenger'' is defined in 
          Sec. 69.53.
GT=gross tonnage as determined under Sec. 69.57.
N1 plus N2 must equal the total number of passengers the 
          vessel is permitted to carry as indicated on the Ship's 
          Passenger Certificate. If N1 plus N2 is less than 
          13, both N1 and N2 are zero.
          [GRAPHIC] [TIFF OMITTED] TC01FE91.074
          
must not be greater than unity.

[[Page 378]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.075


NT must not be less than 0.30 GT.



Sec. 69.65  Calculation of volumes.

    (a) Volumes V and Vc used in calculating gross and net 
tonnages, respectively, must be measured and calculated according to 
accepted naval architectural practices for the spaces concerned.
    (b) The volume of the hull below the upper deck is determined as 
follows:
    (1) If the number and location of sections originally used in making 
other calculations which relate to the form of the vessel (such as 
displacement volumes and center of buoyancy) are reasonably available, 
Simpson's first rule may be applied using those sections.
    (2) If the number and location of stations originally used are not 
reasonably available or do not exist and the hull is of conventional 
design with faired lines, Simpson's first rule may be applied using a 
number and location of stations not less than those indicated in 
Sec. 69.109(g)(1).
    (3) If the hull is of standard geometric shape, a simple geometric 
formula that yields a more accurate volume may be used.
    (4) If the lines of the hull are not fair, the volume may be 
measured by using a combination of methods under this section.
    (c) The volume of structures above the upper deck may be measured by 
applying the superstructure provisions in Sec. 69.113 or by any accepted 
method or combinations of methods.
    (d) Measurements must be taken, regardless of the fitting of 
insulation or the like--
    (1) To the inner side of the shell or structural boundary plating, 
in vessels constructed of metal; and
    (2) To the outer surface of the shell or to the inner side of 
structural boundary surfaces, in all other vessels.
    (e) When determining the volume of a cargo space, measurements must 
be taken without consideration for insulation, sparring, or ceiling 
fitted within the space.
    (f) Measurements must be to the nearest one-twentieth of a foot.
    (g) Calculations must be made on a worksheet and must be 
sufficiently detailed to permit easy review. The measurement procedures 
used must be identified on the worksheet.



Sec. 69.67  Marking of cargo spaces.

    Cargo spaces used in determining volume (Vc) for calculating net 
tonnage must be permanently marked with the letters ``CC'' (cargo 
compartment) which are at least four inches in height and positioned so 
as to be visible at all times.



Sec. 69.69  Issuance of an International Tonnage Certificate (1969).

    On request of the vessel owner, an International Tonnage Certificate 
(1969) is issued for a vessel measured under this subpart that is 79 
feet or more in registered length and that will engage on a foreign 
voyage. The Certificate is issued to the vessel owner or master and must 
be maintained on board the vessel when it is engaged on a foreign 
voyage.



Sec. 69.71  Change of net tonnage.

    (a) When a vessel is altered so that the net tonnage is increased, 
the new net tonnage must be applied immediately.
    (b) A vessel concurrently assigned load lines under both the 
International Convention on Load Lines (parts 42, 44, 45, or 47 of this 
chapter) and either the International Convention for the Safety of Life 
at Sea (SOLAS) (part 46 of this chapter) or other international 
agreement must be assigned only one net tonnage. The net tonnage 
assigned must be the net tonnage applicable to the load line assigned 
under the International Convention on Load Lines or SOLAS for the trade 
in which the vessel in engaged.
    (c) When a vessel is altered so that the net tonnage is decreased or 
the vessel's trade is changed so that the load

[[Page 379]]

line assigned for that trade under paragraph (b) of this section is no 
longer appropriate and results in a decrease in its net tonnage, a new 
International Tonnage Certificate (1969) incorporating that net tonnage 
may not be issued until twelve months after the date on which the 
current Certificate was issued. However, if one of the following apply, 
a new Certificate may be issued immediately:
    (1) The vessel is transferred to the flag of another nation.
    (2) The vessel undergoes alterations or modifications which the 
Coast Guard deems to be of a major character, such as the removal of a 
superstructure which requires an alteration of the assigned load line.



Sec. 69.73  Variance from the prescribed method of measurement.

    (a) When application of this supart to a novel type vessel produces 
unreasonable or impractical results, the Commandant may determine a more 
suitable method of measurement.
    (b) Requests for a determination must be submitted to the 
Commandant, explain the problem, and include plans and sketches of the 
spaces in question.



Sec. 69.75  Figures.

0=excluded space.
C=enclosed space.
I=space to be considered as an enclosed space.
B=breadth of deck in way of the opening.

[[Page 380]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.040



[[Page 381]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.041



[[Page 382]]



                 Subpart C--Standard Measurement System



Sec. 69.101  Purpose.

    This subpart prescribes the procedures for measuring a vessel under 
the Standard Measurement System described in 46 U.S.C. 14512.



Sec. 69.103  Definitions.

    As used in this subpart--
    Between-deck means the space above the line of the tonnage deck and 
below the line of the deck next above.
    Break means the space between the line of a deck and the upper 
portion of that deck, in cases where that deck is stepped and continued 
at a higher elevation.
    Camber means the perpendicular rise or crown of a deck at the 
centerline of the vessel measured above the skin of the vessel at the 
vessel's sides.
    Ceiling means the permanent planking or plating fitted directly on 
the inboard side of frames, floors, or double bottom and includes cargo 
battens and refrigeration insulation but does not include false ceiling 
which stands off from the framing.
    Coaming means both the vertical plating around a hatch or skylight 
and the sill below an opening in a bulkhead.
    Deckhouse means a structure that is on or above the uppermost 
complete deck and that does not extend from side to side of the vessel. 
The term includes cabin trunks and closed-in spaces over the holds of 
vessels.
    Depth of frame means the perpendicular depth of a bottom frame and 
the athwart distance between the inboard and outboard faces of a side 
frame.
    Double bottom means a space at the bottom of a vessel between the 
inner and outer bottom plating and used solely for water ballast.
    Floor means a vertical plate or timber extending from bilge to bilge 
in the bottom of a vessel. In a wooden vessel, ``floor'' means the 
lowermost timber connecting the main frames at the keel when that timber 
extends the full depth of the frames to which it is fastened. In a 
double bottom, floors usually extend from the outer to the inner bottom.
    Gross tonnage is defined in Sec. 69.107(a).
    Hatch means an opening in a deck through which cargo is laden or 
discharged.
    Line of tonnage deck means the line determined under Sec. 69.109(e).
    Line of uppermost complete deck means the line determined under 
Sec. 69.111(b).
    Net tonnage is defined in Sec. 69.107(b).
    Registered breadth is defined in Sec. 69.53.
    Registered depth means ``molded depth'' as defined in Sec. 69.53.
    Registered length is defined in Sec. 69.53.
    Shelter deck means the uppermost deck that would have qualified as 
the uppermost complete deck had it not been fitted with a middle line 
opening.
    Step means a cutoff in a deck or in the bottom, top, or sides of a 
space resulting in varying heights of a deck or varying heights or 
widths of a space.
    Superstructure means all permanent structures (such as forecastle, 
bridge, poop, deckhouse, and break) on or above the line of the 
uppermost complete deck or, if the vessel has a shelter deck, on or 
above the line of the shelter deck.
    Tonnage deck is defined in Sec. 69.109(c).
    Tonnage length is defined in Sec. 69.109(f).
    Uppermost complete deck means the uppermost deck--
    (a) Which extends from stem to stern and from side to side at all 
points of its length;
    (b) The space below which is enclosed by the sides of the vessel;
    (c) Through which there is no opening that would exempt the space 
below from being included in gross tonnage; and
    (d) Below which there is no opening through the hull that would 
exempt the space below from being included in gross tonnage.



Sec. 69.105  Application for measurement services.

    Applications for measurement services under this subpart must 
include the following information and plans:
    (a) Type of vessel.
    (b) Vessel's name and official number (if assigned).
    (c) Builder's name and the vessel hull number assigned by the 
builder.
    (d) Place and year built.
    (e) Date keel was laid.
    (f) Overall length, breadth, and depth of vessel.

[[Page 383]]

    (g) Lines plan.
    (h) Booklet of offsets.
    (i) Capacity plans for tanks
    (j) Construction plans showing measurements and scantlings of hull 
and superstructure.
    (k) Tonnage drawing showing tonnage length in profile and tonnage 
sections.
    (l) Arrangement plans.

CGD 87-015b, 54 FR 37657, Sept. 12, 1989, as amended by CGD 95-014, 60 
FR 31606, June 15, 1995]



Sec. 69.107  Gross and net tonnages.

    (a) Gross tonnage is the sum of the following tonnages, less certain 
spaces exempt under Sec. 69.117:
    (1) Under-deck tonnage (Sec. 69.109).
    (2) Between-deck tonnage (Sec. 69.111).
    (3) Superstructure tonnage (Sec. 69.113).
    (4) Excess hatchway tonnage (Sec. 69.115(c)).
    (5) Tonnage of framed-in propelling machinery spaces included in 
calculating gross tonnage (Sec. 69.121(d)(1)).
    (b) Net tonnage is gross tonnage less deductions under Secs. 69.119 
and 69.121.



Sec. 69.109  Under-deck tonnage.

    (a) Defined. ``Under-deck tonnage'' means the tonnage of the space 
below the line of the tonnage deck, as that volume is calculated under 
this section.
    (b) Method of calculating tonnage. Under-deck tonnage is calculated 
by applying Simpson's first rule using the tonnage length and the areas 
of the transverse sections prescribed by this section.
    (c) Identifying the tonnage deck. In vessels with two or less decks, 
the tonnage deck is the uppermost complete deck. In vessels with more 
than two decks, the tonnage deck is the second deck from the keel as 
determined in paragraph (d) of this section.
    (d) Enumerating the decks to identify the second deck from the keel. 
Only decks without openings that permit space below to be exempt from 
inclusion in under-deck tonnage are enumerated. Partial decks are not 
considered decks for the purpose of enumerating decks. However, the 
presence of engine and boiler casings, peak tanks, or cofferdams that 
penetrate a deck do not disqualify the deck from being enumerated.
    (e) Identifying the line of the tonnage deck. (1) If the tonnage 
deck runs in a continuous line from stem to stern, the line of the 
tonnage deck is the longitudinal line at the underside of the tonnage 
deck.
    (2) If the tonnage deck runs at different levels from stem to stern, 
the line of the tonnage deck is the longitudinal line of the underside 
of the lowest portion of that deck parallel with the upper portions of 
that deck. (See Sec. 69.123, figures 1 and 2.) Spaces between the line 
of the tonnage deck and the higher portions of that deck are not 
included in under-deck tonnage.
    (f) Tonnage length. (1) ``Tonnage length'' means the length of a 
horizontal straight line measured at the centerline of the vessel from 
the point forward where the line of the tonnage deck intersects the line 
of the inboard faces of the ordinary side frames to the point aft where 
the line of the tonnage deck intersects the inboard face of the transom 
frames or cant frames. (See Sec. 69.123, figure 3.)
    (2) For a vessel having a headblock or square end with framing which 
extends from the tonnage deck to the bottom of the vessel, the tonnage 
length terminates on the inboard face of the head block or end framing. 
When a headblock extends inboard past the face of the end side frames or 
when the headblock plates are excessive in length, the tonnage length 
terminates at the extreme end of the vessel less a distance equal to the 
thickness of an ordinary side frame and shell plating. (See Sec. 69.123, 
figure 4.)
    (3) For a vessel having a square bow or stern and tonnage deck with 
camber, the effect of the camber on the tonnage length must be 
considered. The tonnage length must be measured below the tonnage deck 
at a distance equal to one-third of round camber and one-half of 
straight pitch camber.
    (g) Division of vessel into transverse sections. (1) Except as under 
paragraph (m)(1)(iii) of this section, the tonnage length is divided 
into an even number of equal parts as indicated in the following table:

[[Page 384]]



------------------------------------------------------------------------
                Class                      Tonnage length      Divisions
------------------------------------------------------------------------
1...................................  50 ft. or less.........         6 
2...................................  Over 50 ft. but not             8 
                                       exceeding 100 ft.                
3...................................  Over 100 ft. but not           10 
                                       exceeding 150 ft.                
4...................................  Over 150 ft. but not           12 
                                       exceeding 200 ft.                
5...................................  Over 200 ft. but not           14 
                                       exceeding 250 ft.                
6...................................  Over 250 ft............        16 
------------------------------------------------------------------------

    (2) Transverse sections are cut at each end of the tonnage length 
and at each point of division of the tonnage length. Intervals and one-
third intervals between the points of division are measured to the 
nearest thousandth of a foot. (See Sec. 69.123 figures 5 and 6.)
    (h) Depths of transverse sections. (1) Transverse section depths are 
measured at each point of division of the tonnage length at the 
centerline of the vessel from a point below the line of the tonnage deck 
equal to one-third of the camber or to one-half of the pitch of the beam 
down to the upper side of the ordinary frames, floors, longitudinals, or 
tank top of a cellular double bottom, as the case may be.
    (2) When a depth falls at a point where the tank top of a double 
bottom has a straight fall from centerline to the wings, the depth 
terminates at one-half of the height of fall. (See Sec. 69.123 figure 
8.)
    (3) When a depth falls at a point where the tank top of a double 
bottom rises from the centerline to the wings, the depth terminates at 
one-half the dead rise. (See Sec. 69.123, figure 9.)
    (4) The depth at the midpoint of the tonnage length or, when a 
vessel is measured in parts, the depth at the midpoint of each part 
determines the number of equal parts into which each depth is divided, 
as follows:
    (i) If the midpoint depth is 16 feet or less, each depth is divided 
into four equal parts. If the midpoint depth exceeds 16 feet, each depth 
is divided into six equal parts. (See Sec. 69.123, figure 7.)
    (ii) The interval between the points of division of a depth and one-
third intervals are carried to the nearest hundredth of a foot.
    (i) Breadths of transverse sections. (1) Transverse section breadths 
are measured horizontally at each point of division of each depth and 
also at the upper and lower points of each depth. Breadths are measured 
to the inboard face of the ordinary frames or to the line of the 
ordinary frames. Breadths are measured parallel to each other and at 
right angle to the vessel's centerline. (See Sec. 69.123, figure 7.)
    (2) Upper breadths are not reduced by measuring to deck-beam 
brackets. In cases of camber when an upper breadth passes through the 
deck (see Sec. 69.123, figure 7), the breadth is measured to the line of 
the side frames at the under side of the deck projected vertically up to 
the height of the upper breadth.
    (3) Bottom breadths are measured only as far as the flat of the 
floor extends. (See Sec. 69.123, figures 7 and 10.) When bottom frames 
rise immediately from the flat keel, bottom breadths are equal to the 
breadth of the flat keel. Where there is no double bottom and where 
there is dead rise of the bottom out to the sides of the vessel, bottom 
breadths are equal to the part of the bottom plating not affected by 
dead rise.
    (4) Bottom breadths falling in way of a double bottom, the top of 
which rises or falls from certerline to the wings, are measured between 
the inboard faces of the frame brackets which connect the double bottom 
with the frames. (See Sec. 69.123, figures 8 and 9.)
    (j) Measuring spaces having ceiling. The maximum allowance for 
terminating measurements on ceiling is three inches on the bottom frames 
or tank top and three inches on each side frame. When ceiling is less 
than three inches thick, only the actual thickness is allowed. When 
ceiling is fitted on a platform directly above the bottom frames, depths 
are measured down through the platform to the upper side of the frames 
and the allowable ceiling on the platform is then deducted.
    (k) Area of transverse sections. (1) A transverse section at an end 
of the tonnage length may not yield area, except in vessels (such as 
barges) with an upright bow or stern.
    (2) The breadths of each transverse section are numbered from above, 
the upper being ``1'', the second down being ``2'', and so on to the 
lowest.
    (3) Multiply the even numbered breadths by four and the odd numbered 
breadths by two, except for the first

[[Page 385]]

and last breadths, which are multiplied by one.
    (4) Add together the products from paragraph (k)(3) of this section.
    (5) Multiply the sum from paragraph (k)(4) of this section by one-
third of the interval between the breadths. The product is the area of 
the transverse section.
    (l) Tonnage. (1) Number the transverse sections successively ``1'', 
``2'', and so forth, beginning at the bow.
    (2) Multiply the area of the even numbered sections by four and the 
area of the odd numbered sections by two, except the first and last 
sections, which are multiplied by one.
    (3) Add together the products from paragraph (l)(2) of this section 
and multiply the sum by one-third of the interval between the sections. 
The product is the volume under-deck.
    (4) The volume under-deck is divided by 100 and is, subject to 
exemptions, the under-deck tonnage.
    (m) Steps in double bottom. (1) The tonnage length of a vessel 
having a step exceeding six inches in height in its double bottom is 
divided into longitudinal parts at the step. Each part is subdivided as 
follows to determine the number of transverse sections:
    (i) Parts 20 feet or under in length are divided into two equal 
parts.
    (ii) Parts over 20 feet and under 40 feet in length are divided into 
four equal parts.
    (iii) Parts 40 feet or over are divided as provided in paragraph 
(g)(1) of this section.
    (2) The tonnage of each part is calculated separately. The sum of 
the tonnages of the parts is the under-deck tonnage.
    (n) Outside shaft tunnel exclusion. Any portion of an outside shaft 
tunnel included in tonnage through the process of measurement is 
subtracted from the under-deck tonnage.
    (o) Open vessels. (1) An open vessel is one of any length without a 
deck or with one or more partial decks, the total length of which is 
less than one-half the tonnage length.
    (2) The line of the tonnage deck for an open vessel is the upper 
edge of the upper strake. Depths of transverse sections are taken from 
this line.
    (3) Any vessel, other than one having a mechanically refrigerated 
hold, that is not an open vessel and that has a tonnage length of less 
than 50 feet is measured as an open vessel, if the distance between the 
line of its tonnage deck and the upper edge of the upper strake is more 
than one-sixth of the midship depth. ``Midship depth'' means the depth 
measured from the line of the upper edge of the upper strake to the 
point in the bottom used for measuring tonnage depths.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989; 54 FR 40240, Sept. 29, 1989]



Sec. 69.111  Between-deck tonnage.

    (a) Defined. ``Between-deck tonnage'' means the tonnage of the space 
above the line of the tonnage deck and below the line of the uppermost 
complete deck.
    (b) Identifying the line of the uppermost complete deck. (1) If the 
uppermost complete deck runs in a continuous line from stem to stern, 
the line of the uppermost complete deck is the longitudinal line of the 
underside of the uppermost complete deck.
    (2) If the uppermost complete deck runs at different levels from 
stem to stern, the line of the uppermost complete deck is the 
longitudinal line of the underside of the lowest portion of that deck 
parallel with the upper portions of that deck. Spaces between the line 
of the uppermost complete deck and the higher portions of the deck are 
included in superstructure tonnage.
    (c) Method for calculating tonnage. The tonnage of each level of the 
between-deck space is calculated separately, as follows:
    (1) The length of each level is measured at the mid-height between 
the line of the deck above and the line of the deck below. Measure from 
the point forward where the continuation of the line of the inboard face 
of the normal side frames intersects the center line of the vessel aft 
to the forward face of the normal transom framing.
    (2) Divide the length under paragraph (c)(1) of this section into 
the same number of equal parts into which the tonnage length is divided 
under Sec. 69.109(g)(1).
    (3) Measure at mid-height between the faces of the normal side 
frames the

[[Page 386]]

inside breadth of the space at each end and at each point of division of 
the length. Number the breaths successively ``1'', ``2'', and so forth 
beginning at the bow.
    (4) Multiply the even numbered breadths by four and the odd numbered 
breadths by two, except the first and last, which are multiplied by one.
    (5) Add together the products under paragraph (c)(4) of this section 
and multiply the sum by one-third of the interval between the points at 
which the breadths are taken. The product is the square foot area of the 
space at mid-height.
    (6) Multiply the area of the space at mid-height by the average of 
the heights taken each point of division of the space. The product 
divided by 100 is the tonnage of that space.
    (7) The between-deck tonnage is the sum of the tonnage of each level 
within the between-deck space.



Sec. 69.113  Superstructure tonnage.

    (a) Defined. ``Superstructure tonnage'' means the tonnage of all 
permanent structures, such as forecastle, bridge, poop, deckhouse, and 
break, on or above the line of the uppermost complete deck (or line of 
shelter deck, if applicable).
    (b) Method of calculating tonnage. The tonnage of all structures on 
each level on or above the uppermost complete deck (or shelter deck, if 
applicable) is calculated separately as follows:
    (1) The length of each structure is measured along its centerline at 
mid-height between the line of the inboard face of the framing on one 
end to the line of the inboard face of the framing on the other end. 
(See Sec. 69.123, figure 11.)
    (2) Divide the length under paragaph (b)(1) of this section into an 
even number of equal parts most nearly equal to those into which the 
tonnage length is divided under Sec. 69.109.
    (3) Measure at mid-height the inside breadth at each end and at each 
point of division of the length. Number the breadths successively ``1'', 
``2'', and so forth, beginning at the extreme forward end of the 
structure. If an end of the structure is in the form of a continuous arc 
or curve, the breadth at that end is one-half the nearest breadth. If an 
end is in the form of an arc or curve having a decided flat, the breadth 
at the end is two-thirds of the nearest breadth.
    (4) Multiply the even numbered breadths by four and the odd numbered 
by two, except the first and last breadth, which are multiplied by one.
    (5) Add together the products under paragraph (b)(4) of this section 
and multiply the sum by one-third of the interval between the points at 
which the breadths are taken. The product is the square foot area of the 
structure at mid-height.
    (6) Multiply this area by the average of the heights taken at each 
point of division of the structure between its decks or the line of its 
decks. The product divided by 100 is the tonnage of that structure.
    (c) A structure having steps in its deck or side must be measured in 
parts.
    (d) The superstructure tonnage is the sum of tonnages of each level 
above the line of the uppermost complete deck (or shelter deck, if 
applicable).
    (e) When a structure is located over a cut-away portion of the 
tonnage deck, the structure's height is measured from the under side of 
its overhead deck to the line of the tonnage deck. If the tonnage deck 
has no camber, allow for camber in the overhead deck.
    (f) For structures of a standard geometric shape, a simple geometric 
formula that yields an accurate volume may be used.



Sec. 69.115  Excess hatchway tonnage.

    (a) Hatchways that are above the tonnage deck and are either open to 
the weather or within open structures are measured to determine excess 
hatchway tonnage. Hatchways that are in between-deck spaces, on decks 
within closed-in structures, or on open structures are not measured.
    (b) The tonnage of a hatchway is its length times breadth times mean 
depth divided by 100. Mean depth is measured from the under side of the 
hatch cover to the top of the deck beam.
    (c) From the sum of the tonnage of the hatchways under this section, 
subtract one-half of one percent of the vessel's gross tonnage exclusive 
of the hatchway tonnage. The remainder is

[[Page 387]]

added as excess hatchway tonnage in calculating gross tonnage.



Sec. 69.117  Spaces exempt from inclusion in gross tonnage.

    (a) Purpose. This section lists spaces which are exempt from 
inclusion in gross tonnage.
    (b) Spaces on or above the line of the uppermost complete deck. The 
following spaces or portions of spaces on or above the line of the 
uppermost complete deck are exempt if the spaces or portions are 
reasonable in extent and adapted and used exclusively for the purpose 
indicated:
    (1) Spaces for anchor gear, including capstan, windlass, and chain 
locker, are exempt.
    (2) Companions and booby-hatches protecting stairways or ladderways 
leading to spaces below are exempt, whether or not the spaces below are 
exempt.
    (3) Galley or other spaces fitted with a range or oven for cooking 
food to be consumed on board the vessel are exempt.
    (4) Spaces designed to provide light or air to propelling machinery 
are exempt, as follows:
    (i) When propelling machinery is located entirely on or above the 
line of the uppermost complete deck, the entire propelling machinery 
space and all fuel bunker spaces that are also located above that line 
are exempt as light or air spaces. (See exception in Sec. 69.121(d)(1) 
for framed-in spaces.)
    (ii) When part of the propelling machinery projects above the line 
of the uppermost complete deck into a space used exclusively to provide 
light or air to the propelling machinery, the entire space is exempt as 
light or air space. When any portion of this space is used for purposes 
other than providing light or air, only the portion of the space used 
for light or air, the space occupied by the propelling machinery itself, 
and a propelling machinery working space allowance under Sec. 69.121 
limited to two feet, if available, on each side of the propelling 
machinery are exempt.
    (iii) Any part of an escape shaft, or a companion sheltering an 
escape shaft, above the line of the uppermost complete deck is exempt as 
light or air space.
    (iv) Space that would otherwise be exempt as a light or air space is 
not exempt when propelling machinery is boxed-in and does not extend 
above the line of the uppermost complete deck. Any portion of the boxed-
in space above the line of the uppermost complete deck is exempt.
    (5) Skylights affording light or air to a space below, other than to 
propelling machinery spaces. Space immediately below the line of the 
deck on which a skylight is located is exempt only when there is an 
opening in the next lower deck directly below the skylight to permit 
light or air to an even lower deck.
    (6) Machinery spaces, other than for propelling machinery under 
Sec. 169.121.
    (7) Spaces for steering gear.
    (8) Water closet spaces that are fitted with at least a toilet and 
are intended for use by more than one person.
    (9) The space in a wheelhouse necessary for controlling the vessel.
    (c) Passenger spaces. (1) As used in this section, the term 
``passenger'' includes officers and enlisted men on military vessels who 
are not assigned ship's duties and not entered on the ship's articles.
    (2) As used in this section, ``passenger space'' means a space 
reserved exclusively for the use of passengers and includes, but is not 
limited to, berthing areas, staterooms, bathrooms, toilets, libraries, 
writing rooms, lounges, dining rooms, saloons, smoking rooms, and 
recreational rooms. The space need not be part of or adjacent to a 
berthing area to be considered a passenger space.
    (3) A passenger space located on or above the first deck above the 
uppermost complete deck is exempt from gross tonnage.
    (4) A passenger space located on the uppermost complete deck is 
exempt from gross tonnage only when it has no berthing accommodations 
and is an open structure under paragraph (d) of this section.
    (d) Open structures. (1) Structures that are located on or above the 
line of the uppermost complete deck that are under cover (sheltered) but 
open to the weather are exempt from gross tonnage.

[[Page 388]]

    (2) A structure is considered ``open to the weather'' under 
paragraph (d)(1) of this section when an exterior end bulkhead of the 
structure is open and, except as provided in paragraph (d)(4) of this 
section, is not fitted with any means of closing. To be considered 
``open to the weather'', the end bulkhead must not have a coaming height 
of more than two feet in way of any required opening and have one of the 
following:
    (i) Two openings, each at least three feet wide and at least four 
feet high in the clear, one on each side of the centerline of the 
structure.
    (ii) One opening at least four feet wide and at least five feet high 
in the clear.
    (iii) One opening at least 20 square feet in the clear with a 
breadth in excess of four feet and a height of not less than three feet.
    (3) A compartment within an open structure is considered open to the 
weather only when an interior bulkhead of that compartment has an 
opening or openings that meet the requirements for end bulkheads under 
paragraphs (d)(2)(i) through (d)(2)(iii) of this section. Other 
compartments within the structure are not considered open to the 
weather.
    (4) An interior or exterior opening that is temporarily closed by 
shifting boards dropped into channel sections at the sides of the 
opening or by plates or boards held in place by hook bolts is considered 
open to the weather--
    (i) If the hook bolts are spaced at least one foot apart and hook 
over a stiffener bar around the perimeter of the opening;
    (ii) If the cover plates fay against the bulkhead;
    (iii) If battening, caulking, or gaskets of any material are not 
used; and
    (iv) If cleats, stud bolts, hinges, bolts through the bulkhead, or 
other attachments (other than hook bolts) that may be used in 
conjunction with the temporary cover as a means of closing the opening 
are not installed at the edge of opening. (See Sec. 69.123, Figure 12.)
    (5) A structure with its aft end entirely open from the under side 
of its overhead stiffeners down to the deck, to the line of the deck, or 
to a coaming not exceeding three inches in height and open athwartship 
between the inboard faces of the side stiffeners is considered open to 
the weather. The opening may be covered by a wire mesh screen or 
temporarily closed by canvas secured at the top and lashed or buttoned 
in place.
    (e) Open space between the shelter deck and the next lower deck. (1) 
Space that is between the shelter deck and the next lower deck and that 
is under cover (sheltered) but open to the weather is exempt from gross 
tonnage when all openings in the uppermost complete deck are provided 
with a watertight means of closing.
    (2) A space is considered ``open to the weather'' under paragraph 
(e)(1) of this section when the shelter deck above the space has a 
middle line opening which conforms to the following:
    (i) The middle line opening must be at least four feet long in the 
clear and at least as wide as the after cargo hatch on the shelter deck, 
but not less than one-half the width of the vessel at the midpoint of 
the length of the opening. The opening may have rounded corners not 
exceeding a nine inch radius. When a greater radius is required by the 
Coast Guard or a Coast Guard recognized classification society under 
Sec. 42.05-60 of this chapter, notification of that requirement must be 
submitted to the Commandant.
    (ii) The middle line opening must be located so that the distance 
between the aft edge of the middle line opening and the vessel's stern 
is not less than one-twentieth of the tonnage length of the vessel and 
the distance between the fore edge of the opening and the vessel's stem 
is not less than one-fifth of the tonnage of the vessel.
    (iii) The middle line opening must not be within a structure of any 
type.
    (iv) If the middle line opening is guarded by rails or stanchions, 
the rails and stanchions must not be used to secure or assist in 
securing a cover over the opening.
    (v) The coaming of the middle line opening must not exceed one foot 
mean height above the shelter deck. Bolts must not pass through the 
stiffeners or flanges on the coaming, nor may there be any other 
attachments on the coaming for fastening a cover. Portable

[[Page 389]]

wood covers may be fitted over the middle line opening if held in place 
only by lashings fitted to the under side of the covers. Metal covers 
may be fitted if held in place only by hook bolts spaced not less than 
18 inches apart that pass through the cover and hook over angle 
stiffeners or flanges fitted to the outside of the coaming.
    (vi) The space below the middle line opening must have a minimum 
length of four feet throughout its entire breadth and height and be in 
the clear at all times.
    (vii) A scupper having a five inch minimum inside diameter and 
fitted with a screw down non-return valve geared to and operated from 
the shelter deck must be fitted on each side of the upper deck in way of 
the middle line opening.
    (3) When the shelter deck space forward or aft of the middle line 
opening is divided by interior bulkheads, only those compartments with 
at least two openings that progress to the middle line opening are 
considered ``open to the weather'' under paragraph (e)(1) of this 
section. Each required opening must be at least three feet wide and at 
least four feet high in the clear, must not have a coaming height or 
more than two feet, and must not be fitted (except as provided in 
paragraph (d)(4) of this section) with any means of closing. Other 
compartments within the shelter deck space are not considered ``open to 
the weather'' under paragraph (e)(1) of this section.
    (f) Water ballast spaces. A space, regardless of location, adapted 
only for water ballast and not available for stores, supplies, fuel, or 
cargo (other than water to be used for underwater drilling, mining, and 
related purposes, including production), upon request, may be exempt 
from gross tonnage if the following are met:
    (1) The space must be available at all times only for water ballast 
that is piped through a system independent of other systems (except fire 
fighting and bilge suction systems). Pumps, pipes, and other equipment 
for loading and unloading water ballast must be of a size suitable for 
the efficient handling of the water ballast within a reasonable time 
frame. All manholes providing access to a water ballast space must be 
oval or circular and not greater than 34 inches in diameter. Except for 
those on a deck exposed to the weather, the manholes may have a coaming 
not exceeding six inches in height. Existing hatches over spaces being 
converted to water ballast spaces must have a watertight cover plate 
welded to the hatch and a manhole, as described in this paragraph, 
fitted in the plating.
    (2) The primary purpose of the water ballast must be to afford a 
means of maintaining the vessel's stability, immersion, trim, pre-
loading conditions, or seakeeping capabilities.
    (3) If the space is in a vessel that is subject to inspection under 
46 U.S.C. 3301, the space must be considered when determining the 
adequacy of the vessel's stability under 46 CFR chapter I.
    (4) If the total of all water ballast spaces to be exempted from 
gross tonnage exceeds 30% of the vessel's gross tonnage (as calculated 
under this subpart without any allowance for water ballast), a 
justification of the operating conditions that require the water ballast 
must be submitted to the measuring organization. The measuring 
organization reviews the submittal for completeness and, when complete, 
forwards the submittal to the Commandant for approval. Although a single 
condition may justify all water ballast spaces, several conditions may 
be necessary in other cases. However, a particular tank is not justified 
by a condition if another tank already justified by another condition 
could be used as effectively. The justification must--
    (i) Designate the vessel's service;
    (ii) Explain for what purpose under paragraph (f)(2) of this section 
the water ballast is being used;
    (iii) Provide the calculations required in paragraphs (f)(4)(vi) 
through (f)(4)(ix) of this section for those uses on a form similar to 
Coast Guard Stability Test Form CG-993-9;
    (iv) Include the capacity, tank arrangement, and piping plans for 
the vessel;
    (v) Include a statement certifying that the space will be used 
exclusively for water ballast as prescribed by this section;

[[Page 390]]

    (vi) If water ballast is used for stability, describe each loading 
condition and the resultant metacentric height (GM) and include 
calculations;
    (vii) If water ballast is used for immersion or trim, describe those 
conditions and include loading and trim calculations;
    (viii) If water ballast is used for pre-loading, describe how it is 
used and include strength and weight calculations; and
    (ix) If water ballast is used for seakeeping, describe each loading 
condition, GM, period of roll, and, if speed is involved, speed versus 
trim and draft and include calculations.
    (5) If the water ballast space or its use, purpose, or piping are 
changed, the vessel owner or operator must report the change promptly to 
a measurement organization listed in Sec. 69.15 for a determination as 
to whether a tonnage remeasurement is required.
    (g) Methods for measuring exempt spaces. (1) If the exempt space is 
located within the superstructure, the exempt space is measured using 
the same procedures used to measure superstructure tonnage under 
Sec. 69.113.
    (2) If the exempt space is located between-deck, the space is 
measured using the same procedures used for between-deck tonnage under 
Sec. 69.111(c), except that the length of the exempt space is divided 
into the even number of spaces most equal to the number of spaces into 
which the between-deck was divided.
    (3) If the exempt space is located under-deck, the space is measured 
using the same procedures used for under-deck tonnage under Sec. 69.109, 
except that the length of the exempt space is divided into the even 
number of spaces most equal to the number of spaces into which the 
under-deck was divided.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989; 54 FR 40240, Sept. 29, 1989]



Sec. 69.119  Spaces deducted from gross tonnage.

    (a) Purpose. This section lists the requirements for spaces (other 
than propelling machinery spaces under Sec. 69.121) which, though 
included in calculating gross tonnage (i.e., are not exempt under 
Sec. 69.117), are deducted from gross tonnage in deriving net tonnage.
    (b) General. (1) A deductible space must be used exclusively for, 
and be reasonable in size for, its intended purpose.
    (2) When a space is larger than necessary for the safe and efficient 
operation of deductible equipment, only the space occupied by the 
equipment plus a two foot maximum working space on each side of the 
equipment, if available, is deductible.
    (3) Space specified in this section may be located anywhere within 
the vessel, unless otherwise specified.
    (c) Anchor gear. A space below the line of the uppermost complete 
deck occupied by the anchor gear, capstan, windlass, and chain locker is 
deductible. A fore peak used exclusively as chain locker is measured by 
the method prescribed under Sec. 69.117(g)(3).
    (d) Boatswain's stores. A space containing oils, blocks, hawsers, 
rigging, deck gear, or other boatswain's stores for daily use is 
deductible. The maximum deduction allowed for vessels less than 100 
gross tons is one ton and, for vessels 100 gross tons or over, is one 
percent of the gross tonnage, not to exceed 100 tons.
    (e) Chart room. A space for keeping charts and nautical instruments 
and for plotting the vessel's course is deductible. For a combined 
wheelhouse and chart room, that part not exempted as wheelhouse under 
Sec. 69.117(b)(9) is deductible. For small vessels in which the only 
space for a chart room is in a cabin or saloon, one half the space not 
to exceed 1.5 tons is deductible as chart room.
    (f) Donkey engine and boiler. Donkey engine and boiler space is 
deductible when connected with the main (non-cargo) pumps of the vessel, 
except as follows:
    (1) If the space is within the engine room or within the casing 
above the engine room and if the donkey engine is an auxiliary to the 
main propelling machinery, the space is an engine room deduction under 
Sec. 69.121(b).
    (2) If the space is above the line of the uppermost complete deck 
and if the donkey engine is not an auxiliary to the main propelling 
machinery, the space is exempt under Sec. 69.117(b).

[[Page 391]]

    (g) Spaces for the exclusive use of officers or crew. (1) The 
following spaces, regardless of their location (unless otherwise noted), 
are deductible if not used by passengers:
    (i) Sleeping rooms.
    (ii) Bathrooms with a bath tub or shower but without a water closet.
    (iii) Water closets below the line of the uppermost complete deck 
serving more than one person, with or without a bath tub or shower. 
Water closets, regardless of location, that serve only one person or 
that are accessible only through a stateroom or bedroom serving one 
person are considered as part of the space they serve and are deductible 
only if that space is deductible.
    (iv) Clothes drying rooms.
    (v) Drinking water filtration or distilling plant below the line of 
the uppermost complete deck.
    (vi) Hospitals.
    (vii) Mess rooms.
    (viii) Office of the chief engineer.
    (ix) Oil skin lockers.
    (x) Pantries.
    (xi) Recreation rooms.
    (xii) Smoking rooms.
    (xiii) Galleys below the line of the uppermost complete deck.
    (2) Shops for engineers, carpenters, plumbers, or butchers and 
offices for clerks, pursers, or postmasters are not deductible, wherever 
located.
    (h) Master's cabin. The master's sleeping room, dressing room, 
bathroom, observation room, reception room, sitting room, water closet, 
and office are deductible.
    (i) Radio room. Spaces in which radio apparatus is installed and 
messages are sent and received and which may provide off-duty operator 
accommodations are deductible.
    (j) Steering gear. Spaces for steering gear below the line of the 
uppermost complete deck are deductible.
    (k) Generators. Spaces for generators below the line of the 
uppermost complete deck are deductible regardless of what space the 
generators serve. These spaces may include other equipment necessary for 
the generator's operation.
    (l) Pump room. Spaces below the line of the uppermost complete deck 
containing pumps that are not capable of handling cargo and that are not 
fuel oil transfer pumps considered part of the propelling machinery 
under Sec. 69.121(b)(2)(v) are deductible.
    (m) Sail stowage. A space for stowing sails on a vessel propelled 
only by sails is deductible up to two and one-half percent of the 
vessel's gross tonnage.
    (n) Waste material space. (1) A tank or collection space, regardless 
of location, used for the carriage or collection of sewage, garbage, 
galley waste, trash, slop-oil mixture, tank cleaning residue, bilge 
residue, or other waste material generated aboard the vessel is 
deductible.
    (2) Space below the line of the uppermost complete deck used 
exclusively to separate, clarify, purify, or otherwise process waste 
material generated aboard the vessel is deductible.
    (o) Passageways. A passageway or companionway is deductible--
    (1) If it serves deductible spaces only; or
    (2) If it serves deductible spaces and is also the sole means of 
access to one of the following non-deductible spaces:
    (i) Lockers of less than two tons each, containing medicine, linen, 
mops, or other items for the free use of the crew.
    (ii) A ship's office.
    (iii) Spare rooms (not exceeding two) used by a pilot, customs 
officer, reserve engineer, or employee or agent of the vessel's owner or 
operator.
    (p) Markings for deductible spaces. (1) Each space deducted under 
this section must be marked with the words ``Certified ______'' 
(inserting the space designation, such as ``Seaman'', ``Generator'', 
Office of Chief Engineer'', ``Hospital'', or ``Anchor Gear''). If a 
deductible space berths more than one crew member, the marking must 
indicate the number of crew members berthed, such as ``Certified ______ 
Seamen'' (inserting the number of crew).
    (2) The abbreviations ``Cert.'' for ``certified'' and ``W.C.'' for 
``water closet'' may be used.
    (3) The markings must be in Roman letters and Arabic numerals at 
least \1/2\ inch in height, must be painted in a light color on a dark 
background, must be embossed, center-punched, carved, or permanently cut 
in a bulkhead or metal plate, and must be placed in a legible location 
over a doorway on the

[[Page 392]]

inside of the space. A metal plate, if used, must be permanently 
fastened in place by welding, riveting, lock screws, or a Coast Guard-
approved bonding agent.
    (q) Method for measuring deductible spaces. (1) A rectangular space 
must be measured by taking the product of its length, breadth, and 
height.
    (2) A space with curved sides on or above the tonnage deck is 
measured according to Sec. 69.109.
    (3) Space less than 15 feet in length may be measured by any 
practical method.
    (4) Spaces below the tonnage deck exceeding 15 feet in length and 
bounded by a curved surface conforming to the side of the vessel must be 
measured by the formula used for measuring the superstructure under 
Sec. 69.113.
    (5) The height of a space located on a platform in the hull must be 
measured from the top of the bottom hull frames, if the platform is used 
only to form a flat surface at the bottom of the space, if the platform 
is not more than one foot above the top of the bottom frames, and if the 
space below the platform is not usable.
    (6) The height of a space is measured through any ceiling, paneling, 
false overhead, or other covering, to the space's structural boundary, 
unless the space enclosed by the covering is available for a non-
deductible use.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989; 54 FR 40240, Sept. 29, 1989; 
CGD 92-058, 57 FR 59938, Dec. 17, 1992]



Sec. 69.121  Engine room deduction.

    (a) General. The engine room deduction is either a percentage of the 
vessel's total propelling machinery spaces or a percentage of the 
vessel's gross tonnage.
    (b) Propelling machinery spaces. (1) Propelling machinery spaces are 
the spaces occupied by the main propelling machinery and auxiliary 
machinery and spaces reasonably necessary for the operation and 
maintenance of the machinery. Propelling machinery spaces do not include 
spaces for fuel tanks, spaces exempt from gross tonnage under 
Sec. 69.117, and spaces not used or not available for use in connection 
with the propelling machinery.
    (2) Propelling machinery spaces are--
    (i) Space below the crown. The crown is the top of the main space of 
the engine room to which the heights of the main space are taken. The 
crown is either the underside of a deck or, if the side bulkheads are 
sloping, the uppermost point at which the slope terminates. (See 
Sec. 69.123, figures 13 and 14.)
    (ii) Framed-in space located between the crown and the uppermost 
complete deck and used for propelling machinery or for the admission of 
light or air to propelling machinery spaces. (See Sec. 69.123, figures 
13 and 14.)
    (iii) Shaft tunnel space and thrust block recess space.
    (iv) Space below the uppermost complete deck used for escape shafts 
or trunked ladderways leading from the aft end of the shaft tunnel to 
the deck above.
    (v) Space containing a fuel oil transfer pump located in a separate 
space and not used for bunkering the vessel. When the pump serves both 
ballast and fuel oil, only one-half of the pump's space is considered a 
propelling machinery space.
    (vi) Spaces containing fuel oil settling tanks used solely for the 
main boilers. The space must not exceed one percent of the vessel's 
gross tonnage.
    (vii) Spaces for engineers' stores and workshops located below the 
uppermost complete deck and either open to a propelling machinery space 
or separated from a propelling machinery space only by a screen 
bulkhead. The space must not exceed three-quarters of one percent of the 
vessel's gross tonnage.
    (viii) Framed-in space located above the line of the uppermost 
complete deck and used for propelling machinery or for the admission of 
light or air to a propelling machinery space, when requested under 
paragraph (d) of this section.
    (ix) If the propelling machinery is boxed-in below the tonnage deck, 
the boxed-in space plus the spaces outside of the boxing for the shaft, 
auxiliary engines, and related propelling machinery. If a portion of the 
boxed-in space extends above a platform or partial

[[Page 393]]

deck that is below the uppermost complete deck, that portion is also 
considered part of the propelling machinery space.
    (c) Methods for measuring propelling machinery spaces. (1) If the 
propelling machinery space is bulkheaded off or is not larger than 
necessary for the safe operation and maintenance of the propelling 
machinery, the entire space, or, if bulkheaded off, the portion 
bulkheaded off, is measured for the engine room deduction.
    (2) If the propelling machinery space is not bulkheaded off or is 
larger than necessary for the safe operation and maintenance of the 
propelling machinery, only the space occupied by the propelling 
machinery itself plus a working space of two feet, if available, on each 
side of the propelling machinery is measured for the engine room 
deduction. If the working space overlaps another working space not 
related to the propelling machinery, only one-half of the overlapping 
working space is included in the propelling machinery space. The height 
of the working space is measured as provided in paragraph (c) of this 
section.
    (3) If the propelling machinery is located in more than one space, 
each space must be measured separately.
    (4) If the propelling machinery is located in a space with a step in 
the bottom or side lines, each stepped portion of the space must be 
measured separately.
    (5) The length of a space under paragraph (c)(1) of this section is 
measured from the bulkhead just forward of the propelling machinery to 
the bulkhead just aft of the propelling machinery. The length of a space 
under paragraph (c)(2) of this section is measured from the forward edge 
of the working space to the aft edge of the working space.
    (6) If the boundaries of the propelling machinery space form a 
rectangle, the product of the length, breadth, and height, divided by 
100, is the tonnage of the space.
    (7) If the boundaries of the propelling machinery space are 
continuous fair lines, heights are measured at the fore and aft ends and 
at the center of the space from the bottom frames, floors, or tank top 
of a double bottom up to the line of the crown. A breadth is measured at 
half-height of each height. The product of the length, mean breadth, and 
mean height, divided by 100, is the tonnage of the space.
    (8) If the propelling machinery space is in the aft end of the hull, 
extends from side to side of the hull, and has a continuous bottom line, 
the length of the space is divided into the even number of equal parts 
most nearly equal to the number of parts that the tonnage length under 
Sec. 69.109(g) was divided. The tonnage is then calculated by the same 
method used for calculating the under-deck tonnage in Sec. 69.109(l).
    (9) The tonnage of a framed-in space located between the crown and 
the uppermost complete deck and used for propelling machinery or for the 
admission of light or air to the propelling machinery space, is the 
product of its length, breadth, and height, divided by 100.
    (10) The tonnage of a shaft tunnel, or a thrust block recess, having 
a flat top is the product of its length, breadth, and height, divided by 
100. If the shaft tunnel or thrust block recess top is not flat, the 
space above must be calculated by using the appropriate geometrical 
formula. If the space aft of the shaft tunnel extends from side to side 
of the vessel, the tonnage of the space is found by the formula for 
measuring peak tanks in Sec. 69.109(l).
    (11) The length and breadth of the space for a shaft tunnel, or a 
thrust block recess, when not cased is that which is necessary for 
maintenance of the shaft. The height allowed for thrust block recess 
space must not exceed seven feet. The mean height allowed for the shaft 
tunnel space must not exceed six feet. In a multi-screw vessel where the 
shaft tunnel or thrust block recess space is open from side to side, 
measure only the space used for purposes of propelling the vessel.
    (12) When the propelling machinery is on a bed at the vessel's 
bottom, the height of the propelling machinery space is measured from 
the top of the bottom frames or floors.
    (d) Request to treat certain framed-in engine room spaces as part of 
a propelling machinery space. (1) Under Sec. 69.117(b)(4), framed-in 
spaces located above the line of the uppermost complete deck and used 
for propelling machinery or for

[[Page 394]]

admitting light or air to a propelling machinery space are exempt from 
inclusion in gross tonnage. However, upon written request to a 
measurement organization listed in Sec. 69.15, the vessel owner may 
elect to have these spaces included in calculating gross tonnage, then 
deducted from gross tonnage as propelling machinery spaces under 
paragraph (b)(2)(viii) of this section.
    (2) The framed-in space must be safe, seaworthy, and used only for 
propelling machinery or for the admission of light or air to the 
propelling machinery space. The length of the space must not exceed the 
length of the propelling machinery space and the breadth must not exceed 
one-half of the extreme inside midship breadth of the vessel. Portions 
of the framed-in space that are plated over are not included in the 
propelling machinery space.
    (3) To exercise the option in paragraph (d)(1) of this section, all 
of the framed-in space need not be treated as propelling machinery 
space, but only that portion required to entitle the vessel to have 32 
percent of its gross tonnage deducted as an engine room deduction under 
paragraph (e) of this section.
    (e) Calculating the engine room deduction. (1) The engine room 
deduction is based on a percentage of the vessel's gross tonnage or a 
percentage of the total propelling machinery space.
    (2) For vessels propelled in whole or in part by screw--
    (i) If the total propelling machinery space is 13 percent or less of 
the vessel's gross tonnage, deduct \32/13\ times the total propelling 
machinery space;
    (ii) If the total propelling machinery space is more than 13 but 
less than 20 percent of the vessel's gross tonnage, deduct 32 percent of 
the vessel's gross tonnage; or
    (iii) If the total propelling machinery space is 20 percent or more 
of the vessel's gross tonnage, deduct either 32 percent of the vessel's 
gross tonnage or 1.75 times the total propelling machinery space, 
whichever the vessel's owner elects.
    (3) For vessels propelled in whole or in part by paddle-wheel--
    (i) If the total propelling machinery space is 20 percent or less of 
the vessel's gross tonnage, deduct \37/20\ times the total propelling 
machinery space;
    (ii) If the total propelling machinery space is more than 20 but 
less than 30 percent of the vessel's gross tonnage, deduct 37 percent of 
the vessel's gross tonnage; or
    (iii) If the total propelling machinery space is 30 percent or more 
of the vessel's gross tonnage, deduct either 37 percent of the vessel's 
gross tonnage or 1.5 times the total propelling machinery space, 
whichever the vessel's owner elects.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989; 54 FR 40240, Sept. 29, 1989]

[[Page 395]]



Sec. 69.123  Figures.

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[GRAPHIC] [TIFF OMITTED] TC01FE91.043



[[Page 397]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.044



[[Page 398]]



                   Subpart D--Dual Measurement System



Sec. 69.151  Purpose.

    This subpart prescribes measurement requirements for the assignment 
of either one gross and one net tonnage or two gross and two net 
tonnages to vessels under the Dual Measurement System.



Sec. 69.153  Application of other laws.

    (a) If a vessel is assigned two gross tonnages under Sec. 69.175(b), 
the higher gross tonnage is the tonnage used when applying inspection, 
manning, and load line laws and regulations to the vessel.
    (b) Tonnage marks are not to be construed as additional load line 
marks. Whether or not a tonnage mark is submerged under Sec. 69.171 has 
no effect on the applicability of load line laws and regulations.



Sec. 69.155  Measurement requirements.

    Except as otherwise required by this subpart, the measurement 
requirements under the Standard Measurement System in subpart C of this 
part apply to the measurement of vessels under the Dual Measurement 
System.



Sec. 69.157  Definitions.

    Terms used in this subpart that are defined in Sec. 69.103 have the 
same meaning as in Sec. 69.103, except the terms listed below. As used 
in this subpart,--
    Gross tonnage is defined in Sec. 69.161(a).
    Line for fresh and tropical waters means the line described in 
Sec. 69.177(b)(2).
    Line of the second deck means the line described in Sec. 69.181.
    Line of the uppermost complete deck means a longitudinal line at the 
underside of the uppermost complete deck or, if that deck is stepped, 
the longitudinal line of the underside of the lowest portion of that 
deck parallel with the upper portions of that deck.
    Net tonnage is defined in Sec. 69.161(b).
    Second deck means the next deck below the uppermost complete deck 
that meets the following:
    (a) Is continuous athwartships and in a fore-and-aft direction at 
least between peak bulkheads, even though the deck may have 
interruptions or openings due to propelling machinery spaces, to hatch 
and ventilation trunks not extending longitudinally completely between 
main transverse bulkheads, to ladder and stairway openings, to chain 
lockers, or to cofferdams.
    (b) Is fitted as an integral and permanent part of the vessel.
    (c) Has proper covers to all main hatchways.
    (d) Does not have steps the total of which exceed 48 inches in 
height.
    Tonnage deck means, for a vessel with only one deck, the uppermost 
complete deck and, for a vessel with a second deck, the second deck.
    Tonnage mark means the line described in Sec. 69.177(a)(2).



Sec. 69.159  Application for measurement services.

    Applications for measurement services under this subpart must 
include the application information and plans required for the Standard 
Measurement System under Sec. 69.105. The application must indicate 
whether a line for fresh and tropical waters is requested under 
Sec. 69.177(b) and, for vessels with more than one deck, indicate 
whether one or two sets of tonnages are desired under Sec. 69.175.



Sec. 69.161   Gross and net tonnages.

    (a) Gross tonnage means the tonnage of a vessel, less certain spaces 
exempt under Sec. 69.169, and is the sum of the following:
    (1) Under-deck tonnage (Sec. 69.163).
    (2) Between-deck tonnage (Sec. 69.165)
    (3) Superstructure tonnage (Sec. 69.167)
    (4) Excess hatchway tonnage (Sec. 69.115)
    (5) Tonnage of framed-in propelling machinery spaces included in 
calculating gross tonnage (Sec. 69.121(d)(1)).
    (b) Net tonnage means gross tonnage less deductions under 
Sec. 69.119 and Sec. 69.121.



Sec. 69.163  Under-deck tonnage.

    The under-deck tonnage provisions in Sec. 69.109 apply; except that, 
under the Dual Measurement System, spaces between the line of the 
tonnage deck and the tonnage deck itself due to a stepped tonnage deck 
are included in under-deck tonnage.

[[Page 399]]



Sec. 69.165  Between-deck tonnage.

    The between-deck tonnage provisions in Sec. 69.111 apply, except 
that, under the Dual Measurement System, between-deck space extends from 
the tonnage deck to the uppermost complete deck, rather than from the 
line of the tonnage deck to the line of the uppermost complete deck.



Sec. 69.167  Superstructure tonnage.

    The superstructure tonnage provisions in Sec. 69.113 apply; except 
that, under the Dual Measurement System, spaces between the line of the 
uppermost complete deck and the uppermost complete deck itself due to a 
stepped uppermost complete deck are not included in the superstructure 
tonnage.



Sec. 69.169  Spaces exempt from inclusion in gross tonnage.

    The tonnage of the following spaces is exempt from inclusion in 
gross tonnage:
    (a) Spaces listed in Sec. 69.117(b) when located within the 
superstructure.
    (b) Spaces listed in Sec. 69.117(c)(1) through (c)(3) when located 
above, but not on, the uppermost complete deck.
    (c) Spaces listed in Sec. 69.117(f), regardless of location.
    (d) Spaces available for carrying dry cargo and stores when located 
on or above the uppermost complete deck.
    (e) When a vessel is assigned a tonnage mark and the tonnage mark is 
not submerged,--
    (1) Spaces listed in Sec. 69.117(b) when located between the 
uppermost complete deck and the second deck;
    (2) Spaces listed in Sec. 69.117(c)(1) through (c)(3) when located 
on the uppermost complete deck; and
    (3) Spaces available for carrying dry cargo and stores when located 
between the uppermost complete deck and the second deck.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989, as amended by CGD 92-058, 57 
FR 59938, Dec. 17, 1992]



Sec. 69.171  When the tonnage mark is considered submerged.

    For the purpose of this subpart, a tonnage mark is considered 
submerged when--
    (a) In salt or brackish water, the upper edge of the tonnage mark is 
submerged; and
    (b) In fresh or tropical water, the upper edge of the line for fresh 
and tropical waters is submerged.



Sec. 69.173  Tonnage assignments for vessels with only one deck.

    A vessel without a second deck is assigned only one gross and one 
net tonnage. In calculating the gross tonnage, only the exemptions in 
Sec. 69.169 (a) through (d) are allowed. Markings under Sec. 69.177 are 
not permitted on these vessels.



Sec. 69.175  Tonnage assignments for vessels with a second deck.

    (a) At the option of the vessel owner, a vessel having a second deck 
is assigned either two gross and two net tonnages or one gross and one 
net tonnage.
    (b) If two gross and two net tonnages are assigned, the higher 
tonnages (i.e. those based only on exemptions under Sec. 69.169 (a) 
through (d)) are applicable when the upper edge of the tonnage mark is 
submerged and the lower tonnages (i.e. those based only on all 
exemptions under Sec. 69.169) are applicable when the upper edge of the 
tonnage mark is not submerged.
    (c) If only the low gross and low net tonnages, as calculated under 
paragraph (b) of this section, are assigned, these tonnages are 
applicable at all times. On these vessels, the tonnage mark must be 
located in accordance with Sec. 69.177(a)(6) at the level of the 
uppermost part of the load line grid.



Sec. 69.177  Markings.

    (a) Tonnage mark. (1) All vessels with a second deck that are 
measured under the Dual Measurement System must have, on each side of 
the vessel, a tonnage mark, and an inverted triangle identifying the 
tonnage mark, as described and located under this section. (See the 
figure in Sec. 69.183(a).) Vessels with only one deck are not assigned 
markings under this section.
    (2) The tonnage mark is a horizontal line 15 inches long and one 
inch wide. The tonnage mark must be designated by a welded bead or other 
permanent

[[Page 400]]

mark 15 inches long placed along the top edge of the tonnage mark.
    (3) Above the tonnage mark is placed an inverted equilateral 
triangle, each side of which is 12 inches long and one inch wide, with 
its apex touching the upper edge of the center of the tonnage mark.
    (4) If the vessel has a load line mark, the longitudinal location of 
the center of the tonnage mark must be between 21 inches and six feet 
six inches aft of the vertical centerline of the load line ring. (See 
the figures in Sec. 69.183 (b) and (c).) If the vessel does not have a 
load line mark, the center of the tonnage mark must be located 
amidships.
    (5) Except as under paragraph (a)(6) of this section, the upper edge 
of the tonnage mark must be located below the line of the second deck at 
the distance indicated in Table 69.177(a)(5). (See the figure in 
Sec. 69.183(b).)

[[Page 401]]



                         Table 69.177(a)(5)--Minimum Distance in Inches Between the Tonnage Mark and the Line of the Second Deck                        
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                        L divided by D                                                  
            L (in feet)             --------------------------------------------------------------------------------------------------------------------
                                          12           13           14           15           16           17           18           19           20    
--------------------------------------------------------------------------------------------------------------------------------------------------------
220 and under......................          2.0          2.0          2.0          2.0          2.0          2.0          2.0          2.0          2.0
230................................          3.2          2.0          2.0          2.0          2.0          2.0          2.0          2.0          2.0
240................................          4.7          2.0          2.0          2.0          2.0          2.0          2.0          2.0          2.0
250................................          6.3          3.3          2.0          2.0          2.0          2.0          2.0          2.0          2.0
260................................          8.0          4.8          2.1          2.0          2.0          2.0          2.0          2.0          2.0
270................................          9.9          6.4          3.5          2.0          2.0          2.0          2.0          2.0          2.0
280................................         11.8          8.1          4.9          2.1          2.0          2.0          2.0          2.0          2.0
290................................         13.9          9.9          6.5          3.5          2.0          2.0          2.0          2.0          2.0
300................................         16.0         11.7          8.1          4.9          2.1          2.0          2.0          2.0          2.0
310................................         18.3         13.7          9.8          6.4          3.5          2.0          2.0          2.0          2.0
320................................         20.7         15.8         11.7          8.1          4.9          2.1          2.0          2.0          2.0
330................................         23.2         18.0         13.6          9.8          6.4          3.5          2.0          2.0          2.0
340................................         25.9         20.4         15.7         11.6          8.1          4.9          2.1          2.0          2.0
350................................         28.7         22.9         17.9         13.6          9.8          6.5          3.6          2.0          2.0
360................................         31.7         25.5         20.2         15.7         11.7          8.2          5.0          2.2          2.0
370................................         34.7         28.3         22.7         17.9         13.6          9.9          6.6          3.7          2.0
380................................         38.0         31.1         25.3         20.2         15.7         11.8          8.3          5.2          2.4
390................................         41.3         34.1         27.9         22.6         17.9         13.8         10.1          6.8          3.8
400................................         44.8         37.2         30.7         25.0         20.1         15.8         11.9          8.4          5.3
410................................         48.2         40.3         33.5         27.7         22.6         18.1         14.0         10.4          7.2
420................................         51.5         43.4         36.4         30.4         25.2         20.6         16.4         12.7          9.7
430................................         54.8         46.5         39.4         33.3         27.9         23.2         19.0         15.2         11.8
440................................         58.4         49.9         42.6         36.4         30.9         26.0         21.7         17.8         14.4
450................................         62.1         53.4         46.0         39.6         33.9         29.0         24.6         20.6         17.1
460................................         65.9         57.0         49.5         42.9         37.1         32.1         27.6         23.5         19.9
470................................         69.8         60.7         53.0         46.3         40.4         35.2         30.6         26.5         22.8
480................................         73.7         64.4         56.5         49.7         43.7         38.4         33.7         29.5         25.7
490................................         77.5         68.1         60.0         53.0         46.9         41.5         36.7         32.4         28.5
500................................         81.2         71.6         63.4         56.2         50.0         44.5         39.6         35.2         31.2
510................................         84.9         75.1         66.7         59.4         53.0         47.4         42.4         37.9         33.9
520................................         88.4         78.4         69.9         62.4         55.9         50.2         45.1         40.5         36.4
530................................         91.8         81.6         72.9         65.3         58.7         52.9         47.7         43.0         38.8
540................................         95.2         84.8         75.9         68.1         61.4         55.5         50.2         45.4         41.2
550................................         98.4         87.8         78.8         70.9         64.0         58.0         52.6         47.8         43.4
560................................        101.6         90.8         81.6         73.6         66.6         60.5         55.0         50.1         45.6
570................................        104.8         93.8         84.4         76.3         69.2         62.9         57.3         52.3         47.8
580................................        107.9         96.8         87.2         78.9         71.7         65.3         59.6         54.5         49.9
590................................        111.0         99.7         90.0         81.5         74.2         67.7         61.9         56.7         52.0
600................................        114.0        102.5         92.6         84.0         76.5         69.9         64.0         58.8         54.0
610................................        117.0        105.3         95.2         86.5         78.9         72.1         66.2         60.8         56.0
620................................        120.0        108.0         97.8         88.9         81.2         74.4         68.3         62.8         58.0
630................................        122.9        110.7        100.4         91.3         83.5         76.6         70.4         64.8         59.9
640................................        125.7        113.4        102.9         93.7         85.8         78.7         72.4         66.8         61.7
650................................        128.6        116.1        105.4         96.1         88.0         80.8         74.4         68.7         63.6

[[Page 402]]

                                                                                                                                                        
660................................        131.4        118.7        107.8         98.3         90.1         82.8         76.3         70.6         65.3
670................................        134.2        121.2        110.2        100.6         92.2         84.8         78.3         72.4         67.1
680................................        136.9        123.8        112.8        102.9         94.3         86.8         80.2         74.2         68.9
690................................        139.6        126.3        115.0        105.1         96.4         88.8         82.1         76.0         70.6
700................................        142.3        128.8        117.3        107.3         98.5         90.8         83.9         77.8         72.3
710................................        144.9        131.3        119.6        109.4        100.5         92.7         85.7         79.5         73.9
720................................        147.5        133.7        121.8        111.5        102.5         94.6         87.5         81.2         75.5
730................................        150.1        136.1        124.0        113.6        104.5         96.5         89.3         82.9         77.1
740................................        152.7        138.5        126.2        115.7        106.5         98.3         91.5         84.5         78.7
750................................        155.3        140.8        128.5        117.8        108.4        100.1         92,8         86.1         80.3
760................................        157.8        143.1        130.6        119.7        110.3        101.9         94.4         87.8         81.7
770................................        160.2        145.4        132.7        121.7        112.1        103.6         96.0         89.3         83.2
780................................        162.6        147.6        134.8        123.7        113.9        105.3         97.6         90.8         84.7
790................................        165.1        149.9        136.9        125.6        115.7        107.0         99.2         92.3         86.1
800................................        167.5        152.1        138.9        127.4        117.4        108.6        100.8         93.8        87.4 
--------------------------------------------------------------------------------------------------------------------------------------------------------
L=the length in feet of the line of the second deck at the centerline of the vessel from the inner surface of the frames at the vessel's stem to the    
  inner surface of the frames at the vessel's stern.                                                                                                    
D=The vertical distance in feet from the top of the flat keel of the vessel to the line of the second deck.                                             
EXAMPLE (1) For a vessel in which L=450 feet and L/D=15 feet, read down from the L/D column ``15'' and to the right on the column ``450'' to where the  
  two columns intersect at 39.6. The tonnage mark must be located 39.6 inches below the line of the second deck.                                        
EXAMPLE (2) If L or L/D is an intermediate number, the distance ``a'' between the tonnage mark and the line of the second deck must be obtained by      
  linear interpolation. For a vessel in which L=424.80 feet and L/D=15.17:                                                                              


[[Page 403]]


------------------------------------------------------------------------
                                          Table L/  Actual L/   Table L/
                   L                        D=15     D=15.17      D=16  
------------------------------------------------------------------------
Table 420..............................       30.4  .........       25.2
Actual 424.80..........................          r          a          s
Table 430..............................       33.3  .........       27.9
------------------------------------------------------------------------
Interpolation:                                                          
r=30.4+0.48 (33.3-30.4)=31.79                                           
s=25.2+0.48 (27.9-25.2)=26.50                                           
a=r-0.17 (r-s)=31.79-0.17 (31.79-26.50)=30.89 inches                    

    (6) For the following vessels with a load line mark, the upper edge 
of the tonnage mark must be located at the level of the uppermost part 
of the load line grid:
    (i) Vessels assigned only one gross and one net tonnage under 
Sec. 69.175(c).
    (ii) Vessels for which a load line assigning authority certifies 
that the vessel's load line mark was located as though the second deck 
were the freeboard deck.
    (b) Line for fresh and tropical waters. (1) Except as under 
paragraph (b)(4) of this section, a horizontal line for fresh and 
tropical waters may be assigned at the vessel owner's request.
    (2) The line must be nine inches long and one inch wide and located 
above and to the left of the tonnage mark at a distance equal to one 
forty-eighth of the distance from the top of the flat keel to the 
tonnage mark. The tonnage mark and the line for fresh and tropical 
waters must be connected by a vertical line one inch wide. (See the 
figure in Sec. 69.183(a).)
    (3) The line for fresh and tropical waters must be designated by a 
welded bead or other permanent mark nine inches long placed along the 
upper edge of the line.
    (4) For vessels with a load line mark, if the load line assigning 
authority certifies that the load line mark was located as though the 
second deck were the freeboard deck, a line for fresh and tropical 
waters must not be placed on the vessel.
    (c) Freeboard deck mark. A vessel assigned two gross and two net 
tonnages which has more than one deck and no load line mark assigned 
must have a mark on each side of the vessel with the same dimensions and 
location as the freeboard deck line mark under Sec. 42.13-20 of this 
chapter, except that the mark must be located directly above the tonnage 
mark.
    (d) The line of the second deck. The line of the second deck must 
not be marked on the side of the vessel.
    (e) Color of markings. All markings under this section must be 
maintained in either a light color on a dark background or a dark color 
on a light background.



Sec. 69.179  Certification of markings.

    (a) Before a certificate of measurement is issued for a vessel 
requiring a tonnage mark, a certification by a measurement organization 
under Sec. 69.15 that all markings meet the requirements of this subpart 
is required.
    (b) The Coast Guard, at any time, may verify markings under this 
subpart.



Sec. 69.181  Locating the line of the second deck.

    (a) If the second deck is not stepped, the line of the second deck 
is the longitudinal line of the underside of the second deck at the side 
of the hull.
    (b) If the second deck is stepped (as in the examples following this 
paragraph), the line of the second deck is a longitudinal line extended 
parallel to each portion of the second deck and located at the height of 
the underside of the amidships portion of the second deck at the side of 
the hull--
    (1) Plus, for each stepped portion of the second deck higher than 
the second deck at amidships, a distance equal to the length of the 
stepped portion divided by the total length of the second deck times the 
height that the step is above the height of the amidship portion of the 
second deck; and
    (2) Minus, for each stepped portion of the second deck lower than 
the second deck at amidships, a distance equal to the length of the 
stepped portion divided by the total length of the second deck times the 
height that the amidship portion of the second deck is above the height 
of the step.

[[Page 404]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.045





Sec. 69.183  Figures.

    (a) Tonnage mark with an equilateral triangle and a line for fresh 
and tropical waters.
[GRAPHIC] [TIFF OMITTED] TC01FE91.046


[[Page 405]]


W=\1/48\ of the distance from the top of the flat keel to the tonnage 
mark. (See Sec. 69.177(b)(2).)

    (b) Tonnage mark location if the load line mark is not placed as 
though the second deck were the freeboard deck.
[GRAPHIC] [TIFF OMITTED] TC01FE91.047

k=a distance between 21 inches and six feet six inches.
a=distance derived from Table 69.177(a)(5).

    (c)--Tonnage mark location if the load line mark is placed as though 
the second deck were the freeboard deck.

[[Page 406]]

[GRAPHIC] [TIFF OMITTED] TC01FE91.048


k=a distance between 21 inches and six feet six inches.
a=the distance between the line of the second deck and the uppermost 
part of the load line grid.



                Subpart E--Simplified Measurement System



Sec. 69.201  Purpose.

    This subpart prescribes the procedures for measuring a vessel under 
the Simplified Measurement System described in 46 U.S.C. chapter 145, 
subchapter III.



Sec. 69.203  Definitions.

    As used in this subpart and in Coast Guard Form CG-5397 under 
Sec. 69.205--
    Overall breadth means the horizontal distance taken at the widest 
part of the hull, excluding rub rails, from the outboard side of the 
skin (outside planking or plating) on one side of the hull to the 
outboard side of the skin on the other side of the hull.
    Overall depth means the vertical distance taken at or near midships 
from a line drawn horizontally through the uppermost edges of the skin 
(outside planking or plating) at the sides of the hull (excluding the 
cap rail, trunks, cabins, and deckhouses) to the outboard face of the 
bottom skin of the hull, excluding the keel. For a vessel that is 
designed for sailing and has a keel faired to the hull, the keel is 
included in ``overall depth'' if the distance to the bottom skin of the 
hull cannot be determined reasonably.
    Overall length means the horizontal distance between the outboard 
side of the foremost part of the stem and the outboard side of the 
aftermost part of the stern, excluding rudders, outboard motor brackets, 
and other similar fittings and attachments.
    Registered breadth means--
    (a) For a single-hull vessel, the vessel's overall breadth; and
    (b) For a multi-hull vessel, the horizontal distance taken at the 
widest part of the complete vessel between the outboard side of the skin 
(outside planking or plating) on the outboardmost side of one of the 
outboardmost hulls to the outboard side of the skin on the outboardmost 
side of the other outboardmost hull, excluding rubrails.
    Registered depth means--
    (a) For a single-hull vessel, the vessel's overall depth; and
    (b) For a multi-hull vessel, the overall depth of the deepest hull.
    Registered length means--
    (a) For a single-hull vessel, the vessel's overall length; and

[[Page 407]]

    (b) For a multi-hull vessel, the horizontal distance between the 
outboard side of the foremost part of the stem of the foremost hull and 
the outboard side of the aftermost part of the stem of the aftermost 
hull, excluding fittings or attachments.
    Vessel designed for sailing means a vessel which has the fine lines 
of a sailing craft and is capable of being propelled by sail, whether or 
not the vessel is equipped with an auxiliary motor, a decorative sail, 
or a sail designed only to steady the vessel.

[CGD 87-015b, 54 FR 37657, Sept. 12, 1989; 54 FR 40240, Sept. 29, 1989]



Sec. 69.205  Application for measurement services.

    To apply for measurement under the Simplified Measurement System, 
the owner of the vessel must complete either an Application for 
Simplified Measurement (form CG-5397), or a Builder's Certification and 
First Transfer of Title (form CG-1261) which has the information in Part 
III ``Dimensions'' completed, and submit it to the National Vessel 
Documentation Center.

[CGD 95-014, 60 FR 31606, June 15, 1995]



Sec. 69.207  Measurements.

    (a) All lengths and depths must be measured in a vertical plane at 
centerline and breadths must be measured in a line at right angles to 
that plane. All dimensions must be expressed in feet and inches to the 
nearest half inch or in feet and tenths of a foot to the nearest .05 of 
a foot.
    (b) For a multi-hull vessel, each hull must be measured separately 
for overall length, breadth, and depth and the vessel as a whole must be 
measured for registered length, breadth, and depth.
    (c) The Coast Guard may verify dimensions of vessels measured under 
this subpart.



Sec. 69.209  Calculation of tonnages.

    (a) Gross tonnage. (1) Except as in paragraphs (a)(2) through (a)(5) 
of this section, the gross tonnage of a vessel designed for sailing is 
one-half of the product of its overall length, overall breadth, and 
overall depth (LBD) divided by one hundred (i.e., 0.50 LBD/100), and the 
gross tonnage of a vessel not designed for sailing is 0.67 LBD/100.
    (2) The gross tonnage of a vessel with a hull that approximates in 
shape a rectangular geometric solid (barge-shape) is 0.84 LBD/100.
    (3) The gross tonnage of a multi-hull vessel is the sum of all the 
hulls as calculated under this section.
    (4) If the volume of the principal deck structure of a vessel that 
is indicated as a houseboat on Coast Guard Form CG-5397 is as large as, 
or larger than, the volume of the vessel's hull, the volume of the 
principal deck structure in tons of 100 cubic feet is added to the 
tonnage of the hull to establish the vessel's gross tonnage. The volume 
of the principal deck structure of a vessel is determined by the product 
of its average dimensions.
    (5) If the overall depth of a vessel designed for sailing includes 
the keel, only 75 percent of that depth is used for gross tonnage 
calculations.
    (b) Net tonnage. (1) For a vessel having propelling machinery in its 
hull--
    (i) The net tonnage is 90 percent of its gross tonnage, if it is a 
vessel designed for sailing; or
    (ii) The net tonnage is 80 percent of its gross tonnage, if it is 
not a vessel designed for sailing.
    (2) For a vessel having no propelling machinery in its hull, the net 
tonnage is the same as its gross tonnage.

[[Page 409]]



                              FINDING AIDS




  --------------------------------------------------------------------

  A list of CFR titles, subtitles, chapters, subchapters and parts, and 
an alphabetical listing of agencies publishing in the CFR are included 
in the CFR Index and Finding Aids volume to the Code of Federal 
Regulations which is published separately and revised annually.

  Material Approved for Incorporation by Reference
  Table of CFR Titles and Chapters
  Alphabetical List of Agencies Appearing in the CFR
  List of CFR Sections Affected

[[Page 411]]

            Material Approved for Incorporation by Reference

                     (Revised as of October 1, 1996)

  The Director of the Federal Register has approved under 5 U.S.C. 
552(a) and 1 CFR Part 51 the incorporation by reference of the following 
publications. This list contains only those incorporations by reference 
effective as of the revision date of this volume. Incorporations by 
reference found within a regulation are effective upon the effective 
date of that regulation. For more information on incorporation by 
reference, see the preliminary pages of this volume.


46 CFR CHAPTER 1 (PARTS 41-69)

COAST GUARD, DEPARTMENT OF TRANSPORTATION


American Boat and Yacht Council

  P.O. Box 747, 405 Headquarters Drive, Suite 3, Millersville, MD 21108-
  0747
P-1 Safe Installation of Exhaust Systems for 
  Propulsion and Auxiliary Machinery, 1973........               58.10-5


American Bureau of Shipping

  45 Eisenhower Drive, Paramus, NJ 07652
Rules for Building and Classing Steel Vessels, 
  1989............................................ 58.01; 58.05; 58.10, 
                                                            58.20, 58.25
Rules for Building and Classing Steel Vessels, 
  1986............................................    62.25-1; 62.25-5; 
                                                    62.25-30; 62.35-35; 
                                                    62.35-40; 62.35-50; 
                                                      62.50-30; 62.50-30


American Gas Association (AGA)

  1515 Wilson Boulevard, Arlington, Virginia 22209
AGA Z21.22-86 Relief Valves and Automatic Shutoff 
  Devices for Hot Water Supply Systems, March 28, 
  1986............................................               63.25-3


American National Standards Institute

  1430 Broadway, New York, NY 10018
ANSI B1.1-82 Unified Inch Screw Threads (UN and 
  UNR Thread Form)................................     56.60-1; 56.25-20
ANSI B1.20.1-83 Pipe Threads, General Purpose 
  (Inch)..........................................               56.60-1
ANSI B1.20.3-76 (reaffirmed 1982) Dryseal Pipe 
  Threads (Inch)..................................               56.60-1
ANSI B2.1-68 Pipe Threads.........................               56.60-1
ANSI B16.1-75 C.I. Flanges and Fittings...........   56.60-1; 56.60-10; 
                                                                56.60-15
ANSI B16.3-85 Maleable Iron Threaded Fittings, 
  Classes 150 and 300.............................               56.60-1
ANSI B16.4-85 Cast Iron Threaded Fittings, Classes 
  125 and 250.....................................               56.60-1
ANSI B16.5-77 Steel Pipe Flanges and Pipe Fittings   56.20-1; 56.30-10; 
                                                       56.60-1; 56.60-15
ANSI B16.9-86 Factory-made Wrought Steel 
  Buttwelding Fittings............................               56.60-1
ANSI B16.10-86 Face-to-face and End-to-end 
  Dimensions of Valves............................               56.60-1
ANSI B16.11-80 Forged Steel Fittings, Socket-
  welded and Threaded.............................      56.30-5; 56.60-1
ANSI B16.14-83 Ferrous Pipe Plugs, Bushings, and 
  Locknuts with Pipe Threads......................               56.60-1

[[Page 412]]

ANSI B16.15-85 Cast Bronze Threaded Fittings, 
  Classes 125 and 250.............................               56.60-1
ANSI B16.18-78 Cast Brass Solder-Joints...........               56.60-1
ANSI B16.20-73 Ring Joint Gaskets, Steel Flanges..               56.60-1
ANSI B16.21-78 Non-metallic Gaskets for Flanges...               56.60-1
ANSI B16.22-80 Wrought Copper and Bronze Solder 
  Joint Fittings..................................               56.60-1
ANSI B16.23-76 Cast Bronze Solder-Joint Drainage..               56.60-1
ANSI B16.24-79 Brass or Bronze Flanges and 
  Fittings........................................               56.60-1
ANSI B16.25-86 Buttwelding Ends...................    56.30-5; 56.60-1; 
                                                                56.70-10
ANSI B16.28-86 Wrought Steel Buttwelding Short 
  Radius Elbows and returns.......................               56.60-1
ANSI B16.29-86 Wrought Copper and Wrought Copper 
  Alloy Solder Joint Drainage Fittings-DWV........               56.60-1
ANSI B16.34-88 Valves-Flanged, Threaded, and 
  Welding End.....................................      56.20-1; 56.60-1
ANSI B16.42-87 Ductile Iron Pipe Flanges and 
  Flanged Fittings, Clases 150 and 300............               56.60-1
ANSI B18.2.1-81 Square and Hex Bolts and Screws, 
  Inch Series.....................................     56.25-20; 56.60-1
ANSI B18.2.2-87 Square and Hex Nuts (Inch Series).     56.25-20; 56.60-1
ANSI B31.1-86 Power Piping........................               PART 56
ANSI B31.3-87 Chemical Plant and Petroleum 
  Refinery Piping.................................                 58.60
ANSI B31.5-87 Refrigeration Piping................                 58.20
ANSI B36.10M-85 Welded and Seamless Wrought Steel 
  Pipe............................................   56.07-5; 56.30-20; 
                                                                 56.60-1
ANSI B36.19M-85 Stainless Steel Pipe..............      56.07-5; 56.60-1
ANSI B93.5-79 Recommended Practice for the Use of 
  Fire Resistant Fluids for Fluid Power Systems...              58.30-10
ANSI Z21.22-79 Temperature--Pressure Relief Valves              63.15-30


American Petroleum Institute (API)

  300 Corrigan Tower Bldg., Dallas, TX 75201
API RP 14C Analysis, Design, Installation, and 
  Testing of Basic Surface Safety Systems for 
  Offshore Production Platforms...................                 58.60
API RP 53, Recommended Practice for Blowout 
  Prevention Systems for Drilling Wells...........                 58.60


American Society of Mechanical Engineers (ASME)

  United Engineering Center, 1345 E. 47th St., New York, NY 10017
ANSI/ASME CSD-1-1982 with Addenda CSD-1A-1984, 
  Controls and Safety Devices for Automatically 
  Fired Boilers, November 15, 1984................    63.10-1; 63.15-1; 
                                                                   63.20

  Boiler and Pressure Vessel Code:
  Section I, Power Boilers, July 1989 with 1989 
  addenda......................................... 52.01; 52.05; 52.15; 
                                                   52.20; 52.25; 58.30; 
                                                                   59.10
  Section I, Power Boilers, 1986 edition through 
  1988 addenda....................................    56.15-1; 56.15-5; 
                                                     56.15-10; 56.60-1; 
                                                      56.70-15; 56.95-10
  Section III, Division I, Rules for the 
  Construction of Nuclear Power Plant Components, 
  July 1989 with 1989 addenda.....................                 58.30
  Section IV, Heating Boilers, July 1989 with 1989 
  addenda......................................... 53.01; 53.05; 53.10; 
                                                                   53.12

[[Page 413]]

  Section VII, Recommended Guidelines for the Care 
  of Power Builders, July 1989 with 1989 addenda..                 59.01
  Section VIII, Division I, Pressure Vessels, 1986 
  edition through 1988 addenda....................    56.01-6; 56.15-1; 
                                                     56.15-5; 56.15-10; 
                                                     56.25-5; 56.30-10; 
                                                     56.30-30; 56.60-1; 
                                                    56.60-15; 56.95-10; 
                                                                   64.61
  Section VIII, Division I, Pressure Vessels, July 
  1989 with 1989 addenda.......................... 54.01; 54.03; 54.05; 
                                                   54.10; 54.15; 54.20; 
                                                   54.25; 54.30; 58.30; 
                                                                   59.10
  Section VIII, Division I, Pressure Vessels, 1989 
  edition, with addenda issued December 31, 1989..    64.2; 64.5; 64.7; 
                                                   64.11; 64.13; 64.21; 
                                                            64.25; 64.31
  Section IX, Welding and Brazing Qualifications, 
  1986 edition through 1988 addenda...............   56.70-5; 56.70-20; 
                                                      56.75-20; 56.85-10
  Section IX, Welding and Brazing Qualifications, 
  July 1989 with 1989 addenda..................... 57.01; 57.02; 57.03; 
                                                   57.04; 57.05; 57.06; 
                                                                   59.10


American Society for Testing and Materials

  1916 Race St., Philadelphia, PA 19103
ASTM A 20-80 Steel Plates for Pressure Vessels....              54.25-10
ASTM A 36-81a Structural Steel....................              56.30-10
ASTM A 47-84 Ferritic Malleable Iron Castings.....               56.60-1
ASTM A 53-84a Pipe, Steel, Black and Hot-Dipped, 
  Zinc-Coated, Welded and Seamless................      56.10-5; 56.60-1
ASTM A 106-84a Seamless Carbon Steel Pipe for 
  High-Temperature Service........................               56.60-1
ASTM A 126-84 Gray Iron Castings for Valves, 
  Flanges and Pipe Fittings.......................               56.60-1
ASTM A 134-80 Electric-Fusion (Arc)-Welded Steel 
  Plate Pipe (Sizes 16 in. and over)..............               56.60-1
ASTM A 135-84 Electric-Resistance-Welded Steel 
  Pipe............................................               56.60-1
ASTM A 139-84 Electric-Fusion (Arc)-Welded Steel 
  Pipe (NPS 4 and over)...........................               56.60-1
ASTM A 178-84a Electric-Resistance Welded Carbon 
  Steel Boiler Tubes..............................               56.60-1
ASTM A 179-84 Seamless Cold-Drawn Low Carbon Steel 
  Heat Exchanger and Condenser Tubes..............               56.60-1
ASTM A 182-84c Forged or Rolled Alloy-Steel Pipe 
  Flanges, Forged Fittings, and Valves and Parts 
  for High-Temperature Service....................             56.60-105
ASTM A 192-84a Seamless Carbon Steel Boiler Tubes 
  for High-Pressure Service.......................               56.60-1
ASTM A 193-90 Alloy-Steel and Stainless Steel 
  Bolting Materials for High Temperature Service..                 58.30
ASTM A 194-84a Carbon and Alloy Steel Nuts for 
  Bolts for High-Pressure and High-Temperature 
  Service.........................................             56.50-105
ASTM A 197-79 Cupola Malleable Iron...............               56.60-1

[[Page 414]]

ASTM A 199-84 Seamless Cold Drawn Intermediate 
  Alloy-Steel Heat-Exchanger and Condenser Tubes..               56.60-1
ASTM A 203-80 Pressure Vessel Plates, Alloy Steel, 
  Nickel..........................................              54.05-20
ASTM A 210-84a Seamless Medium Carbon Steel Boiler 
  & Super Heater Tubes............................               56.60-1
ASTM A 213-84b Seamless Ferritic and Austenitic 
  Alloy-Steel Boiler, Superheater, and Heat-
  Exchanger Tubes.................................               56.60-1
ASTM A 214-84a Electric-Resistance-Welded Carbon 
  Steel Heat Exchanger and Condenser Tubes........               56.60-1
ASTM A 226-84a Electric Resistance-Welded Carbon 
  Steel Boiler and Superheater Tubes for High-
  Pressure Service................................               56.60-1
ASTM A 234-84a Piping Fittings for Wrought Carbon 
  Steel and Alloy Steel for Moderate and Elevated 
  Temperatures....................................               56.60-1
ASTM A 249-84b Welded Austenitic Steel Boiler, 
  Superheater, Heat-Exchanger, and Condenser Tubes               56.60-1
ASTM A 268-84a Seamless and Welded Ferritic 
  Stainless Steel Tubing for General Service......               56.60-1
ASTM A 276-83 Stainless and Heatresisting Steel 
  Bars and Shapes.................................               56.60-2
ASTM A 307-84 Carbon Steel Externally Threaded 
  Standard Fasteners..............................              56.25-20
ASTM A 312-84c Seamless and Welded Austenitic 
  Stainless Steel Pipe............................    56.50-105; 56.60-1
ASTM A 320-84a Alloy-Steel Bolting Materials for 
  Low-Temperature Service.........................             56.50-105
ASTM A 333-84b Seamless and Welded Steel Pipe for 
  Low-Temperature Service.........................    56.50-105; 56.60-1
ASTM A 334-84b Seamless and Welded Carbon and 
  Alloy-Steel Tubes for Low-Temperature Service...    56.50-105; 56.60-1
ASTM A 335-85a Seamless Ferritic Alloy Steel Pipe 
  for High-Temperature Service....................               56.60-1
ASTM A 350-84a Forgings, Carbon and Low-Alloy 
  Steel, Requiring Notch Toughness Testing for 
  Piping Components...............................             56.50-105
ASTM A 351-84/A 351M-84b Steel Castings, 
  Austenitic, for High-Temperature Service........             56.50-105
ASTM A 352/A 352M-84a Steel Castings, Ferritic and 
  Martensitic, for Pressure Containing Parts, 
  Suitable for Low-Temperature Service............             56.50-105
ASTM A 358-84b Electric-Fusion-Welded Austenitic 
  Chromium-Nickel Alloy Steel Pipe for High-
  Temperature Service.............................               56.60-1
ASTM A 369-84 Carbon and Ferritic Alloy Steel 
  Forged and Bored Pipe for High-Temperature 
  Service.........................................               56.60-1
ASTM A 370-77 Mechanical Testing of Steel Products              54.25-20
ASTM A 376-84b Seamless Austenitic Steel Pipe for 
  High-Temperature Central-Station Service........   56.07-10; 56.60-1; 
                                                                 56.60-2
ASTM A 395-80 Ferritic Ductile Cast Iron Pressure-
  Retaining Castings for use at Elevated 
  Temperatures....................................               56.60-1
ASTM A 403-84a Wrought Austenitic Stainless Steel 
  Piping Fittings.................................               56.60-1
ASTM A 420-84 Piping Fittings of Wrought Carbon 
  Steel and Alloy Steel for Low-Temperature 
  Service.........................................    56.50-105; 56.60-1
ASTM A 430-84a Austenitic Steel, Forged and Bored 
  Pipe for High-Temperature Service...............               56.60-1
ASTM A 520-72 (R 79) Supplementary Requirements 
  Seamless and Electrical-Resistance-Welded Carbon 
  Steel Tubular Products for High Temperature 
  Service Conforming to ISO Recommendations for 
  Boiler Construction.............................               56.60-1

[[Page 415]]

ASTM A 522-81 Forged or Rolled 8 and 9% Nickel 
  Alloy Steel Flanges, Fittings, Valves, and Parts 
  for Low-Temperature Service.....................              56.50-15
ASTM A 575-81 Steel Bars, Carbon, Merchant 
  Quality, M-Grades...............................               56.60-2
ASTM A 576-81 Steel Bars, Carbon, Hot-Wrought, 
  Special Quality.................................               56.60-2
ASTM B 16-85 Free-cutting Brass Rod, and Shapes 
  for use in Shapes for use in Screw Machines.....               56.60-2
ASTM B 21-83b Naval Brass Rod, Bar and Shapes.....               56.60-2
ASTM B 26-84 Aluminum-Alloy sand Castings.........               56.60-2
ASTM B 42-84a Seamless Copper Pipe, Standard Sizes               56.60-1
ASTM B 43-84a Seamless Red Brass Pipe, Standard 
  Sizes...........................................               56.60-1
ASTM B 68-83 Seamless Copper Tube, Bright Annealed               56.60-1
ASTM B 75-84 Seamless Copper Tube.................               56.60-1
ASTM B 85-84 Aluminum-Alloy Die Castings..........               56.60-2
ASTM B 88-83a Seamless Copper Water Tube..........               56.60-1
ASTM B 96-84a Copper-Silicon Alloy Plate, Sheet, 
  Strip, and Rolled Bar for General Purposes and 
  Pressure Vessels................................               56.60-2
ASTM B 97-80 Copper Silicon Alloy Plate, Sheet, 
  Strip and Rolled Bar for General Purposes.......               58.50-5
ASTM B 111-85 Copper and Copper-Alloy Seamless 
  Condenser Tubes and Ferrule Stock...............               56.60-1
ASTM B 122-85 Copper-Nickel-Tin Alloy, Copper-
  Nickel-Zinc Alloy (Nickel Silver) & Copper-
  Nickel Alloy Plate, Sheet, Strip and Rolled Bar.                 58.50
ASTM B 124-84 Copper and Copper-Alloy Forging Rod, 
  Bar and Shapes..................................               56.60-2
ASTM B 127-80a Nickel Copper Alloy (UNS NO 4400) 
  Plate, Sheet and Strip..........................     58.50-5; 58.50-10
ASTM B 152-84 Copper Sheet, Strip, Plate and 
  Rolled Bar......................................                 58.50
ASTM B 154-82 Mercurous Nitrate Test for Copper 
  and Copper Alloys...............................               56.60-2
ASTM B 161-81 Nickel Seamless Pipe and Tube.......               56.60-1
ASTM B 165-81 Nickel-Copper Alloy (UNS N04400) 
  Seamless Pipe and Tube..........................               56.60-1
ASTM B 167-80 Nickel-Chromium-Iron Alloy (UNS NO 
  6600) Seamless Pipe and Tube....................               56.60-1
ASTM B 171-85a Copper-Alloy Condenser Tube Plates.               56.60-2
ASTM B 209-81 Aluminum-Alloy Sheet and Plate......     58.50-5; 58.50-10
ASTM B 210-82a Aluminum-Alloy Drawn Seamless Tubes               56.60-1
ASTM B 234-85 Aluminum-Alloy Drawn Seamless Tubes 
  for Condensers and Heat Exchangers..............               56.60-1
ASTM B 241-83a Aluminum-Alloy Seamless Pipe and 
  Seamless Extruded Tube..........................               56.60-1
ASTM B 280-83 Seamless Copper Tube for Air 
  Conditioning and Refrigeration Field Service....               56.60-1
ASTM B 283-84 Copper and Copper-Alloy Die Forging 
  (Hot-pressed)...................................               56.60-2
ASTM B 315-85 Seamless Copper Alloy Pipe and Tube.               56.60-1
ASTM B 361-81 Factory Made Wrought Aluminum and 
  Aluminum Alloy Welding Fittings.................               56.60-1
ASTM D 92-78 Test for Flash and Fire Points by 
  Cleveland Open Cup..............................              58.30-10
ASTM D 93-80 Test for Flash Point by Pensky-
  Martens Closed Tester...........................    58.01-10; 58.01-15

[[Page 416]]

ASTM D 323-79 Test for Vapor Pressure of Petroleum 
  Products (Reid Method)..........................               58.16-5
ASTM D 396-80 Fuel Oils...........................    63.05-75; 65.10-75
ASTM D 635-81 Test Rate of Burning and/or Extent 
  and Time of Burning of Self-Supporting Plastics 
  in a Horizontal Position........................              56.60-25
ASTM D 665-92 Standard Test Method for Rust-
  Preventing Characteristics of Inhibited Mineral 
  Oil in the Presence of Water....................     61.03-1; 61.20-17
ASTM D 1785-83 Poly (Vinyl Chloride) (PVC) Plastic 
  Pipe, Schedules 40, 80, and 120.................              56.60-25
ASTM D 2241-84 Poly (Vinyl Chloride) (PVC) 
  Pressure-Rated Pipe (SDR-Series)................              56.60-25
ASTM D 2464-76 Threaded Poly (Vinyl Chloride) 
  (PVC) Plastic Pipe Fittings, Schedule 80........              56.60-25
ASTM D 2466-78 Socket-type Poly (Vinyl Chloride) 
  (PVC) Plastic Pipe Fittings, Schedule 40........              56.60-25
ASTM D 2467-76a Socket-type Poly (Vinyl Chloride) 
  (PVC) Plastic Pipe Fittings, Schedule 80........              56.60-25
ASTM D 2665-82 Poly (Vinyl Chloride) (PVC) Plastic 
  Drain, Waste, and Vent Pipe and Fittings........              56.60-25
ASTM D 2863-77 Measuring the Minimum Oxygen 
  Concentration to Support Candle-Like Combustion 
  of Plastics (Oxygen Index)......................              56.60-25
ASTM E 23-80 Notched Bar Impact Testing of 
  Metallic Materials..............................               54.05-5
ASTM E 23-82 Notched Bar Impact Testing of 
  Metallic Materials..............................             56.50-105
ASTM E 208-69 (R 75) Conducting Drop-Weight Test 
  to Determine Nil-Ductility Transition 
  Temperature of Ferritic Steels..................               54.05-5
ASTM F 682-82a Wrought Carbon Steel Sleeve-Type 
  Pipe Couplings..................................               56.60-1
ASTM F 1006-86 Entrainment Separators for Use in 
  Marine Piping Applications......................               56.60-1
ASTM F 1007-86 Pipe-Line Expansion Joints of the 
  Packed Slip Type or Marine Application..........               56.60-1
ASTM F 1020-86 Line-Blind Valves for Marine 
  Applications....................................               56.60-1
ASTM F 1120-87 Circular Metallic Bellows Type 
  Expansion Joints for Use in Marine Piping 
  Applications....................................               56.60-1
ASTM F 1121-87, International Shore Connections 
  for Marine Fire Applications....................               56.60-1
ASTM F 1123-87 Non-Metallic Expansion Joints......               56.60-1
ASTM F 1139-88 Steam Traps and Drains.............               56.60-1
ASTM F 1172-88 Fuel Oil Meters of the Volumetric 
  Positive Displacement Type......................               56.60-1
ASTM F 1173-88 Epoxy Resin Fiberglass Pipe and 
  Fittings to be Used for Marine Applications.....     56.60-1; 56.60-25
ASTM F 1199-88 Cast (All Temperatures and 
  Pressures) and Welded Pipe Line Strainers (150 
  psig and 150 deg. F Maximum)....................               56.60-1
ASTM F 1200-88 Fabricated (Welded) Pipe Line 
  Strainers (Above 150 psig and 150 deg. F).......               56.60-1
ASTM F 1201-88 Fluid Conditioner Fittings in 
  Piping Applications Above 0 deg. F..............               56.60-1
ASTM F 1387-93 Standard Specification for 
  Performance of Mechanically Attached Fittings, 
  incl. Supplementary Requirements and Annex......     56.01-2; 56.30-25
ASTM F 1476-93 Standard Specification for 
  Performance of Gasketed Mechanical Couplings for 
  Use in Piping Applications, incl. Annex.........     56.01-2; 56.30-35

[[Page 417]]

ASTM F 1548-94 Standard Specification for the 
  Performance of Fittings for Use with Gasketed 
  Mechanical Couplings, Used in Piping 
  Applications....................................     56.01-2; 56.30-35


Compressed Gas Association

  1725 Jefferson Davis Highway, Suite 1004, Arlington, VA 22202
S-1.2 Safety Relief Device Standards--Cargo and 
  Portable Tanks for Compressed Gases, 1979.......              54.15-25
S-1.2.5.2 Flow Test of Safety Relief Valves, 1979.              54.15-10


Expansion Joint Manufacturers Association, Inc.

  25 North Broadway, Tarrytown, NY 10591
Standards of the Expansion Joint Manufacturers 
  Association, 1980 edition with 1985 addenda.....               56.60-1


Fluid Controls Institute, Inc.

  Plaza 222, U.S. Highway One, Tequesta, FL 33458
69-1 Pressure Rating Standard for Steam Traps, 
  1977............................................               56.60-1


International Maritime Organization (formerly Inter-Governmental 
Maritime Organization)

  IMO Sales, New York Nautical Instrument and Service Corp., 140 W. 
  Broadway, New York, NY 10013
A.467(XII), Guidelines for Acceptance of Non-
  Duplicated Rudder Actuators for Tankers, 
  Chemical Tankers and Gas Carriers of 10,000 Tons 
  Gross Tonnage and Above But Less Than 100,000 
  Tonnes Deadweight, 1981.........................              58.25-60
A.468(XII), Code on Noise Levels on Board Ships, 
  1981............................................              58.01-50


Manufacturers Standardization Society

  127 Park Street, NE., Vienna, VA 22180
SP-6-85 Standard Finishes for Contact Faces of 
  Pipe Flanges and Connecting-End Flanges of 
  Valves and Fittings.............................     56.25-10; 56.60-1
SP-9-87 Spot-facing for Bronze, Iron and Steel 
  Flanges.........................................               56.60-1
SP-25 Standard Marking System for Valves, 
  Fittings, Flanges and Unions, 1978..............              54.01-25
SP-25-88 Standard Marking System for Valves, 
  Fittings, Flanges and Unions....................    56.15-1; 56.20-5; 
                                                                 56.60-1
SP-42 Class 150--Corrosion Resistant Gate Globe, 
  Angle and check valves with Flanged and Butt-
  Welded Ends, 1978...............................               56.60-1
SP-44-85 Steel Pipe Line Flanges..................               56.60-1
SP-45-87 By-pass and Drain Connection Standard....     56.20-20; 56.60-1
SP-51-86 Class 150LW Corrosion Resistant Cast 
  Flanges and Fittings, 1978......................               56.60-1
SP-55-85 Quality Standard for Steel Castings and 
  Forgings for Valves, Flanges and Fittings and 
  other Piping Components--Magnetic Particle 
  Examination Method..............................               56.60-1
SP-58-83 Pipe Hangers and Supports--Materials, 
  Design and Manufacture..........................               56.60-1
SP-61-85 Pressure Testing of Steel Valves.........               56.60-1
SP-67-83 Butterfly Valves.........................               56.60-1
SP-69-83 Pipe Hangers and Supports--Selection and 
  Application.....................................               56.60-1
SP-72-87 Ball Valves with Flanged or Butt-Welding 
  Ends for General Service........................               56.60-1
SP-73-86 Brazing Joints for Wrought and Cast 
  Copper Alloy Solder Joint Pressure Fittings.....               56.60-1
SP-83-87 Steel Pipe Unions, Socket-Welding and 
  Threaded........................................               56.60-1

[[Page 418]]

Naval Publications Forms Center

  Customer Service, Code 1052, 5801 Tabor Ave., Philadelphia, PA 19120

  Military Specification:
  MIL-S-901 Shock Tests, HI, (high impact); 
  shipboard machinery equipment and systems 
  requirements for, 1963..........................              58.30-17


National Fire Protection Association

  Batterymarch Park, Quincy, MA 02269
70 National Electrical Code, 1981.................    63.05-85; 63.10-85
302-89 Fire Protection Standard for Motor Craft, 
  Pleasure and Commercial.........................                 58.10


Society of Automotive Engineers

  485 Lexington Avenue, New York, York 10017
J343-80 Tests and Procedures for SAE 100R Series 
  Hydraulic Hose and Hose Assemblies..............              56.60-25
J429 Mechanical and Quality Requirements for 
  Externally Threaded Fasteners, 1980k............              58.30-15
J1928-89, Devices Providing Backfire Flame Control 
  for Gasoline Engines in Marine Applications.....                 58.10
J1942-89, Hose and Hose Assemblies for Marine 
  Applications....................................                 56.60
J1475-84 Hydraulic Hose Fittings for Marine 
  Applications....................................              56.60-25


Tubular Exchanger Manufacturers Association

  707 Westchester Ave., White Plains, NY 10604
Heat Exchangers, Class ``B,'' ``C,'' or ``R'', 
  1978............................................               54.01-3


Underwriters Laboratories

  333 Pfingsten Rd., Northbrook, IL 60062
UL 174 Standard for Household Electric Storage 
  Tank Water Heaters, Seventh Edition, April 18, 
  1983 (Revisions through March 1988).............               63.25-3
UL 296 Standard for Oil Burners, Seventh Edition, 
  August 22, 1980 (Revisions through August 1985).               63.15-5
UL 343 Standard for Pumps for Oil-Burning 
  Appliances, Sixth Edition, July 14, 1986........               63.15-3
UL 506-79 Specialty Transformers..................    63.05-55; 63.10-65
UL 814-78 Gas Tube Sign and Ignition Cable........    63.05-55; 63.10-55
UL 1102-80 Non-Integral Marine Fuel, Tanks........              58.50-15
UL 1111-88 Marine Carburetor Flame Arresters......                 58.10
UL 1453, Standard for Electric Booster and 
  Commercial Storage Tank Water Heaters, Third 
  Edition, February 5, 1988.......................               63.25-3


U.S. Department of Commerce

  National Technical Information Service, Springfield, VA 22181
Federal Information Processing Standards 
  Publication 55DC, Guideline: Codes For Named 
  Populated Places, Primary County Divisions, And 
  Other Locational Entities of the United States 
  and Outlying Areas (1987).......................         67.13; 67.119


                                                                    Chap.

[[Page 419]]



                    Table of CFR Titles and Chapters



                   (Revised as of September 30, 1996)

                      Title 1--General Provisions

         I  Administrative Committee of the Federal Register 
                (Parts 1--49)
        II  Office of the Federal Register (Parts 50--299)
        IV  Miscellaneous Agencies (Parts 400--500)

                          Title 2--[Reserved]

                        Title 3--The President

         I  Executive Office of the President (Parts 100--199)

                           Title 4--Accounts

         I  General Accounting Office (Parts 1--99)
        II  Federal Claims Collection Standards (General 
                Accounting Office--Department of Justice) (Parts 
                100--299)

                   Title 5--Administrative Personnel

         I  Office of Personnel Management (Parts 1--1199)
        II  Merit Systems Protection Board (Parts 1200--1299)
       III  Office of Management and Budget (Parts 1300--1399)
        IV  Advisory Committee on Federal Pay (Parts 1400--1499)
         V  The International Organizations Employees Loyalty 
                Board (Parts 1500--1599)
        VI  Federal Retirement Thrift Investment Board (Parts 
                1600--1699)
       VII  Advisory Commission on Intergovernmental Relations 
                (Parts 1700--1799)
      VIII  Office of Special Counsel (Parts 1800--1899)
        IX  Appalachian Regional Commission (Parts 1900--1999)
        XI  Armed Forces Retirement Home (Part 2100)
       XIV  Federal Labor Relations Authority, General Counsel of 
                the Federal Labor Relations Authority and Federal 
                Service Impasses Panel (Parts 2400--2499)
        XV  Office of Administration, Executive Office of the 
                President (Parts 2500--2599)
       XVI  Office of Government Ethics (Parts 2600--2699)
       XXI  Department of the Treasury (Parts 3100--3199)
      XXII  Federal Deposit Insurance Corporation (Part 3202)
     XXIII  Department of Energy (Part 3301)

[[Page 420]]

      XXIV  Federal Energy Regulatory Commission (Part 3401)
      XXVI  Department of Defense (Part 3601)
       XXX  Farm Credit System Insurance Corporation (Parts 4000--
                4099)
      XXXI  Farm Credit Administration (Parts 4100--4199)
    XXXIII  Overseas Private Investment Corporation (Part 4301)
        XL  Interstate Commerce Commission (Part 5001)
       XLI  Commodity Futures Trading Commission (Part 5101)
       XLV  Department of Health and Human Services (Part 5501)
      XLVI  Postal Rate Commission (Part 5601)
     XLVII  Federal Trade Commission (Part 5701)
    XLVIII  Nuclear Regulatory Commission (Part 5801)
         L  Department of Transportation (Part 6001)
       LII  Export-Import Bank of the United States (Part 6201)
      LIII  Department of Education (Parts 6300--6399)
       LIV  Environmental Protection Agency (Part 6401)
       LIX  National Aeronautics and Space Administration (Part 
                6901)
        LX  United States Postal Service (Part 7001)
      LXII  Equal Employment Opportunity Commission (Part 7201)
     LXIII  Inter-American Foundation (Part 7301)
       LXV  Department of Housing and Urban Development (Part 
                7501)
      LXVI  National Archives and Records Administration (Part 
                7601)
      LXIX  Tennessee Valley Authority (Part 7901)
     LXXIV  Federal Mine Safety and Health Review Commission (Part 
                8401)
     LXXVI  Federal Retirement Thrift Investment Board (Part 8601)
    LXXVII  Office of Management and Budget (Part 8701)

                          Title 6--[Reserved]

                         Title 7--Agriculture

            Subtitle A--Office of the Secretary of Agriculture 
                (Parts 0--26)
            Subtitle B--Regulations of the Department of 
                Agriculture
         I  Agricultural Marketing Service (Standards, 
                Inspections, Marketing Practices), Department of 
                Agriculture (Parts 27--209)
        II  Food and Consumer Service, Department of Agriculture 
                (Parts 210--299)
       III  Animal and Plant Health Inspection Service, Department 
                of Agriculture (Parts 300--399)
        IV  Federal Crop Insurance Corporation, Department of 
                Agriculture (Parts 400--499)
         V  Agricultural Research Service, Department of 
                Agriculture (Parts 500--599)
        VI  Natural Resources Conservation Service, Department of 
                Agriculture (Parts 600--699)
       VII  Farm Service Agency, Department of Agriculture (Parts 
                700--799)

[[Page 421]]

      VIII  Grain Inspection, Packers and Stockyards 
                Administration (Federal Grain Inspection Service), 
                Department of Agriculture (Parts 800--899)
        IX  Agricultural Marketing Service (Marketing Agreements 
                and Orders; Fruits, Vegetables, Nuts), Department 
                of Agriculture (Parts 900--999)
         X  Agricultural Marketing Service (Marketing Agreements 
                and Orders; Milk), Department of Agriculture 
                (Parts 1000--1199)
        XI  Agricultural Marketing Service (Marketing Agreements 
                and Orders; Miscellaneous Commodities), Department 
                of Agriculture (Parts 1200--1299)
       XIV  Commodity Credit Corporation, Department of 
                Agriculture (Parts 1400--1499)
        XV  Foreign Agricultural Service, Department of 
                Agriculture (Parts 1500--1599)
       XVI  Rural Telephone Bank, Department of Agriculture (Parts 
                1600--1699)
      XVII  Rural Utilities Service, Department of Agriculture 
                (Parts 1700--1799)
     XVIII  Rural Housing Service, Rural Business-Cooperative 
                Service, Rural Utilities Service, and Farm Service 
                Agency, Department of Agriculture (Parts 1800--
                2099)
      XXVI  Office of Inspector General, Department of Agriculture 
                (Parts 2600--2699)
     XXVII  Office of Information Resources Management, Department 
                of Agriculture (Parts 2700--2799)
    XXVIII  Office of Operations, Department of Agriculture (Parts 
                2800--2899)
      XXIX  Office of Energy, Department of Agriculture (Parts 
                2900--2999)
       XXX  Office of Finance and Management, Department of 
                Agriculture (Parts 3000--3099)
      XXXI  Office of Environmental Quality, Department of 
                Agriculture (Parts 3100--3199)
     XXXII  [Reserved]
    XXXIII  Office of Transportation, Department of Agriculture 
                (Parts 3300--3399)
     XXXIV  Cooperative State Research, Education, and Extension 
                Service, Department of Agriculture (Parts 3400--
                3499)
     XXXVI  National Agricultural Statistics Service, Department 
                of Agriculture (Parts 3600--3699)
    XXXVII  Economic Research Service, Department of Agriculture 
                (Parts 3700--3799)
   XXXVIII  World Agricultural Outlook Board, Department of 
                Agriculture (Parts 3800--3899)
     XXXIX  Economic Analysis Staff, Department of Agriculture 
                (Parts 3900--3999)
        XL  Economics Management Staff, Department of Agriculture 
                (Parts 4000--4099)
       XLI  [Reserved]
      XLII  Rural Business-Cooperative Service and Rural Utilities 
                Service, Department of Agriculture (Parts 4200--
                4299)

[[Page 422]]

                    Title 8--Aliens and Nationality

         I  Immigration and Naturalization Service, Department of 
                Justice (Parts 1--499)

                 Title 9--Animals and Animal Products

         I  Animal and Plant Health Inspection Service, Department 
                of Agriculture (Parts 1--199)
        II  Grain Inspection, Packers and Stockyards 
                Administration (Packers and Stockyards Programs), 
                Department of Agriculture (Parts 200--299)
       III  Food Safety and Inspection Service, Meat and Poultry 
                Inspection, Department of Agriculture (Parts 300--
                399)

                           Title 10--Energy

         I  Nuclear Regulatory Commission (Parts 0--199)
        II  Department of Energy (Parts 200--699)
       III  Department of Energy (Parts 700--999)
         X  Department of Energy (General Provisions) (Parts 
                1000--1099)
        XI  United States Enrichment Corporation (Parts 1100--
                1199)
        XV  Office of the Federal Inspector for the Alaska Natural 
                Gas Transportation System (Parts 1500--1599)
      XVII  Defense Nuclear Facilities Safety Board (Parts 1700--
                1799)

                      Title 11--Federal Elections

         I  Federal Election Commission (Parts 1--9099)

                      Title 12--Banks and Banking

         I  Comptroller of the Currency, Department of the 
                Treasury (Parts 1--199)
        II  Federal Reserve System (Parts 200--299)
       III  Federal Deposit Insurance Corporation (Parts 300--399)
        IV  Export-Import Bank of the United States (Parts 400--
                499)
         V  Office of Thrift Supervision, Department of the 
                Treasury (Parts 500--599)
        VI  Farm Credit Administration (Parts 600--699)
       VII  National Credit Union Administration (Parts 700--799)
      VIII  Federal Financing Bank (Parts 800--899)
        IX  Federal Housing Finance Board (Parts 900--999)
        XI  Federal Financial Institutions Examination Council 
                (Parts 1100--1199)
       XIV  Farm Credit System Insurance Corporation (Parts 1400--
                1499)
        XV  Thrift Depositor Protection Oversight Board (Parts 
                1500--1599)
      XVII  Office of Federal Housing Enterprise Oversight, 
                Department of Housing and Urban Development (Parts 
                1700-1799)
     XVIII  Community Development Financial Institutions Fund, 
                Department of the Treasury (Parts 1800--1899)

[[Page 423]]

               Title 13--Business Credit and Assistance

         I  Small Business Administration (Parts 1--199)
       III  Economic Development Administration, Department of 
                Commerce (Parts 300--399)

                    Title 14--Aeronautics and Space

         I  Federal Aviation Administration, Department of 
                Transportation (Parts 1--199)
        II  Office of the Secretary, Department of Transportation 
                (Aviation Proceedings) (Parts 200--399)
       III  Commercial Space Transportation, Federal Aviation 
                Administration, Department of Transportation 
                (Parts 400--499)
         V  National Aeronautics and Space Administration (Parts 
                1200--1299)

                 Title 15--Commerce and Foreign Trade

            Subtitle A--Office of the Secretary of Commerce (Parts 
                0--29)
            Subtitle B--Regulations Relating to Commerce and 
                Foreign Trade
         I  Bureau of the Census, Department of Commerce (Parts 
                30--199)
        II  National Institute of Standards and Technology, 
                Department of Commerce (Parts 200--299)
       III  International Trade Administration, Department of 
                Commerce (Parts 300--399)
        IV  Foreign-Trade Zones Board, Department of Commerce 
                (Parts 400--499)
       VII  Bureau of Export Administration, Department of 
                Commerce (Parts 700--799)
      VIII  Bureau of Economic Analysis, Department of Commerce 
                (Parts 800--899)
        IX  National Oceanic and Atmospheric Administration, 
                Department of Commerce (Parts 900--999)
        XI  Technology Administration, Department of Commerce 
                (Parts 1100--1199)
      XIII  East-West Foreign Trade Board (Parts 1300--1399)
       XIV  Minority Business Development Agency (Parts 1400--
                1499)
            Subtitle C--Regulations Relating to Foreign Trade 
                Agreements
        XX  Office of the United States Trade Representative 
                (Parts 2000--2099)
            Subtitle D--Regulations Relating to Telecommunications 
                and Information
     XXIII  National Telecommunications and Information 
                Administration, Department of Commerce (Parts 
                2300--2399)

                    Title 16--Commercial Practices

         I  Federal Trade Commission (Parts 0--999)
        II  Consumer Product Safety Commission (Parts 1000--1799)

[[Page 424]]

             Title 17--Commodity and Securities Exchanges

         I  Commodity Futures Trading Commission (Parts 1--199)
        II  Securities and Exchange Commission (Parts 200--399)
        IV  Department of the Treasury (Parts 400--499)

          Title 18--Conservation of Power and Water Resources

         I  Federal Energy Regulatory Commission, Department of 
                Energy (Parts 1--399)
       III  Delaware River Basin Commission (Parts 400--499)
        VI  Water Resources Council (Parts 700--799)
      VIII  Susquehanna River Basin Commission (Parts 800--899)
      XIII  Tennessee Valley Authority (Parts 1300--1399)

                       Title 19--Customs Duties

         I  United States Customs Service, Department of the 
                Treasury (Parts 1--199)
        II  United States International Trade Commission (Parts 
                200--299)
       III  International Trade Administration, Department of 
                Commerce (Parts 300--399)

                     Title 20--Employees' Benefits

         I  Office of Workers' Compensation Programs, Department 
                of Labor (Parts 1--199)
        II  Railroad Retirement Board (Parts 200--399)
       III  Social Security Administration (Parts 400--499)
        IV  Employees' Compensation Appeals Board, Department of 
                Labor (Parts 500--599)
         V  Employment and Training Administration, Department of 
                Labor (Parts 600--699)
        VI  Employment Standards Administration, Department of 
                Labor (Parts 700--799)
       VII  Benefits Review Board, Department of Labor (Parts 
                800--899)
      VIII  Joint Board for the Enrollment of Actuaries (Parts 
                900--999)
        IX  Office of the Assistant Secretary for Veterans' 
                Employment and Training, Department of Labor 
                (Parts 1000--1099)

                       Title 21--Food and Drugs

         I  Food and Drug Administration, Department of Health and 
                Human Services (Parts 1--1299)
        II  Drug Enforcement Administration, Department of Justice 
                (Parts 1300--1399)
       III  Office of National Drug Control Policy (Parts 1400--
                1499)

                      Title 22--Foreign Relations

         I  Department of State (Parts 1--199)

[[Page 425]]

        II  Agency for International Development, International 
                Development Cooperation Agency (Parts 200--299)
       III  Peace Corps (Parts 300--399)
        IV  International Joint Commission, United States and 
                Canada (Parts 400--499)
         V  United States Information Agency (Parts 500--599)
        VI  United States Arms Control and Disarmament Agency 
                (Parts 600--699)
       VII  Overseas Private Investment Corporation, International 
                Development Cooperation Agency (Parts 700--799)
        IX  Foreign Service Grievance Board Regulations (Parts 
                900--999)
         X  Inter-American Foundation (Parts 1000--1099)
        XI  International Boundary and Water Commission, United 
                States and Mexico, United States Section (Parts 
                1100--1199)
       XII  United States International Development Cooperation 
                Agency (Parts 1200--1299)
      XIII  Board for International Broadcasting (Parts 1300--
                1399)
       XIV  Foreign Service Labor Relations Board; Federal Labor 
                Relations Authority; General Counsel of the 
                Federal Labor Relations Authority; and the Foreign 
                Service Impasse Disputes Panel (Parts 1400--1499)
        XV  African Development Foundation (Parts 1500--1599)
       XVI  Japan-United States Friendship Commission (Parts 
                1600--1699)
      XVII  United States Institute of Peace (Parts 1700--1799)

                          Title 23--Highways

         I  Federal Highway Administration, Department of 
                Transportation (Parts 1--999)
        II  National Highway Traffic Safety Administration and 
                Federal Highway Administration, Department of 
                Transportation (Parts 1200--1299)
       III  National Highway Traffic Safety Administration, 
                Department of Transportation (Parts 1300--1399)

                Title 24--Housing and Urban Development

            Subtitle A--Office of the Secretary, Department of 
                Housing and Urban Development (Parts 0--99)
            Subtitle B--Regulations Relating to Housing and Urban 
                Development
         I  Office of Assistant Secretary for Equal Opportunity, 
                Department of Housing and Urban Development (Parts 
                100--199)
        II  Office of Assistant Secretary for Housing-Federal 
                Housing Commissioner, Department of Housing and 
                Urban Development (Parts 200--299)
       III  Government National Mortgage Association, Department 
                of Housing and Urban Development (Parts 300--399)
         V  Office of Assistant Secretary for Community Planning 
                and Development, Department of Housing and Urban 
                Development (Parts 500--599)

[[Page 426]]

        VI  Office of Assistant Secretary for Community Planning 
                and Development, Department of Housing and Urban 
                Development (Parts 600--699) [Reserved]
       VII  Office of the Secretary, Department of Housing and 
                Urban Development (Housing Assistance Programs and 
                Public and Indian Housing Programs) (Parts 700--
                799)
      VIII  Office of the Assistant Secretary for Housing--Federal 
                Housing Commissioner, Department of Housing and 
                Urban Development (Section 8 Housing Assistance 
                Programs and Section 202 Direct Loan Program) 
                (Parts 800--899)
        IX  Office of Assistant Secretary for Public and Indian 
                Housing, Department of Housing and Urban 
                Development (Parts 900--999)
         X  Office of Assistant Secretary for Housing--Federal 
                Housing Commissioner, Department of Housing and 
                Urban Development (Interstate Land Sales 
                Registration Program) (Parts 1700--1799)
       XII  Office of Inspector General, Department of Housing and 
                Urban Development (Parts 2000--2099)
        XX  Office of Assistant Secretary for Housing--Federal 
                Housing Commissioner, Department of Housing and 
                Urban Development (Parts 3200--3699)
       XXV  Neighborhood Reinvestment Corporation (Parts 4100--
                4199)

                           Title 25--Indians

         I  Bureau of Indian Affairs, Department of the Interior 
                (Parts 1--299)
        II  Indian Arts and Crafts Board, Department of the 
                Interior (Parts 300--399)
       III  National Indian Gaming Commission, Department of the 
                Interior (Parts 500--599)
        IV  Office of Navajo and Hopi Indian Relocation (Parts 
                700--799)
         V  Bureau of Indian Affairs, Department of the Interior, 
                and Indian Health Service, Department of Health 
                and Human Services (Part 900)
        VI  Office of the Assistant Secretary-Indian Affairs, 
                Department of the Interior (Part 1001)

                      Title 26--Internal Revenue

         I  Internal Revenue Service, Department of the Treasury 
                (Parts 1--799)

           Title 27--Alcohol, Tobacco Products and Firearms

         I  Bureau of Alcohol, Tobacco and Firearms, Department of 
                the Treasury (Parts 1--299)

                   Title 28--Judicial Administration

         I  Department of Justice (Parts 0--199)
       III  Federal Prison Industries, Inc., Department of Justice 
                (Parts 300--399)

[[Page 427]]

         V  Bureau of Prisons, Department of Justice (Parts 500--
                599)
        VI  Offices of Independent Counsel, Department of Justice 
                (Parts 600--699)
       VII  Office of Independent Counsel (Parts 700--799)

                            Title 29--Labor

            Subtitle A--Office of the Secretary of Labor (Parts 
                0--99)
            Subtitle B--Regulations Relating to Labor
         I  National Labor Relations Board (Parts 100--199)
        II  Office of Labor-Management Programs, Department of 
                Labor (Parts 200--299)
       III  National Railroad Adjustment Board (Parts 300--399)
        IV  Office of Labor-Management Standards, Department of 
                Labor (Parts 400--499)
         V  Wage and Hour Division, Department of Labor (Parts 
                500--899)
        IX  Construction Industry Collective Bargaining Commission 
                (Parts 900--999)
         X  National Mediation Board (Parts 1200--1299)
       XII  Federal Mediation and Conciliation Service (Parts 
                1400--1499)
       XIV  Equal Employment Opportunity Commission (Parts 1600--
                1699)
      XVII  Occupational Safety and Health Administration, 
                Department of Labor (Parts 1900--1999)
        XX  Occupational Safety and Health Review Commission 
                (Parts 2200--2499)
       XXV  Pension and Welfare Benefits Administration, 
                Department of Labor (Parts 2500--2599)
     XXVII  Federal Mine Safety and Health Review Commission 
                (Parts 2700--2799)
        XL  Pension Benefit Guaranty Corporation (Parts 4000--
                4999)

                      Title 30--Mineral Resources

         I  Mine Safety and Health Administration, Department of 
                Labor (Parts 1--199)
        II  Minerals Management Service, Department of the 
                Interior (Parts 200--299)
       III  Board of Surface Mining and Reclamation Appeals, 
                Department of the Interior (Parts 300--399)
        IV  Geological Survey, Department of the Interior (Parts 
                400--499)
        VI  Bureau of Mines, Department of the Interior (Parts 
                600--699)
       VII  Office of Surface Mining Reclamation and Enforcement, 
                Department of the Interior (Parts 700--999)

                 Title 31--Money and Finance: Treasury

            Subtitle A--Office of the Secretary of the Treasury 
                (Parts 0--50)
            Subtitle B--Regulations Relating to Money and Finance
         I  Monetary Offices, Department of the Treasury (Parts 
                51--199)

[[Page 428]]

        II  Fiscal Service, Department of the Treasury (Parts 
                200--399)
        IV  Secret Service, Department of the Treasury (Parts 
                400--499)
         V  Office of Foreign Assets Control, Department of the 
                Treasury (Parts 500--599)
        VI  Bureau of Engraving and Printing, Department of the 
                Treasury (Parts 600--699)
       VII  Federal Law Enforcement Training Center, Department of 
                the Treasury (Parts 700--799)
      VIII  Office of International Investment, Department of the 
                Treasury (Parts 800--899)

                      Title 32--National Defense

            Subtitle A--Department of Defense
         I  Office of the Secretary of Defense (Parts 1--399)
         V  Department of the Army (Parts 400--699)
        VI  Department of the Navy (Parts 700--799)
       VII  Department of the Air Force (Parts 800--1099)
            Subtitle B--Other Regulations Relating to National 
                Defense
       XII  Defense Logistics Agency (Parts 1200--1299)
       XVI  Selective Service System (Parts 1600--1699)
       XIX  Central Intelligence Agency (Parts 1900--1999)
        XX  Information Security Oversight Office, National 
                Archives and Records Administration (Parts 2000--
                2099)
       XXI  National Security Council (Parts 2100--2199)
      XXIV  Office of Science and Technology Policy (Parts 2400--
                2499)
     XXVII  Office for Micronesian Status Negotiations (Parts 
                2700--2799)
    XXVIII  Office of the Vice President of the United States 
                (Parts 2800--2899)
      XXIX  Presidential Commission on the Assignment of Women in 
                the Armed Forces (Part 2900)

               Title 33--Navigation and Navigable Waters

         I  Coast Guard, Department of Transportation (Parts 1--
                199)
        II  Corps of Engineers, Department of the Army (Parts 
                200--399)
        IV  Saint Lawrence Seaway Development Corporation, 
                Department of Transportation (Parts 400--499)

                          Title 34--Education

            Subtitle A--Office of the Secretary, Department of 
                Education (Parts 1--99)
            Subtitle B--Regulations of the Offices of the 
                Department of Education
         I  Office for Civil Rights, Department of Education 
                (Parts 100--199)
        II  Office of Elementary and Secondary Education, 
                Department of Education (Parts 200--299)

[[Page 429]]

       III  Office of Special Education and Rehabilitative 
                Services, Department of Education (Parts 300--399)
        IV  Office of Vocational and Adult Education, Department 
                of Education (Parts 400--499)
         V  Office of Bilingual Education and Minority Languages 
                Affairs, Department of Education (Parts 500--599)
        VI  Office of Postsecondary Education, Department of 
                Education (Parts 600--699)
       VII  Office of Educational Research and Improvement, 
                Department of Education (Parts 700--799)
        XI  National Institute for Literacy (Parts 1100-1199)
            Subtitle C--Regulations Relating to Education
       XII  National Council on Disability (Parts 1200--1299)

                        Title 35--Panama Canal

         I  Panama Canal Regulations (Parts 1--299)

             Title 36--Parks, Forests, and Public Property

         I  National Park Service, Department of the Interior 
                (Parts 1--199)
        II  Forest Service, Department of Agriculture (Parts 200--
                299)
       III  Corps of Engineers, Department of the Army (Parts 
                300--399)
        IV  American Battle Monuments Commission (Parts 400--499)
         V  Smithsonian Institution (Parts 500--599)
       VII  Library of Congress (Parts 700--799)
      VIII  Advisory Council on Historic Preservation (Parts 800--
                899)
        IX  Pennsylvania Avenue Development Corporation (Parts 
                900--999)
        XI  Architectural and Transportation Barriers Compliance 
                Board (Parts 1100--1199)
       XII  National Archives and Records Administration (Parts 
                1200--1299)
       XIV  Assassination Records Review Board (Parts 1400-1499)

             Title 37--Patents, Trademarks, and Copyrights

         I  Patent and Trademark Office, Department of Commerce 
                (Parts 1--199)
        II  Copyright Office, Library of Congress (Parts 200--299)
        IV  Assistant Secretary for Technology Policy, Department 
                of Commerce (Parts 400--499)
         V  Under Secretary for Technology, Department of Commerce 
                (Parts 500--599)

           Title 38--Pensions, Bonuses, and Veterans' Relief

         I  Department of Veterans Affairs (Parts 0--99)

[[Page 430]]

                       Title 39--Postal Service

         I  United States Postal Service (Parts 1--999)
       III  Postal Rate Commission (Parts 3000--3099)

                  Title 40--Protection of Environment

         I  Environmental Protection Agency (Parts 1--799)
         V  Council on Environmental Quality (Parts 1500--1599)

          Title 41--Public Contracts and Property Management

            Subtitle B--Other Provisions Relating to Public 
                Contracts
        50  Public Contracts, Department of Labor (Parts 50-1--50-
                999)
        51  Committee for Purchase From People Who Are Blind or 
                Severely Disabled (Parts 51-1--51-99)
        60  Office of Federal Contract Compliance Programs, Equal 
                Employment Opportunity, Department of Labor (Parts 
                60-1--60-999)
        61  Office of the Assistant Secretary for Veterans 
                Employment and Training, Department of Labor 
                (Parts 61-1--61-999)
            Subtitle C--Federal Property Management Regulations 
                System
       101  Federal Property Management Regulations (Parts 101-1--
                101-99)
       105  General Services Administration (Parts 105-1--105-999)
       109  Department of Energy Property Management Regulations 
                (Parts 109-1--109-99)
       114  Department of the Interior (Parts 114-1--114-99)
       115  Environmental Protection Agency (Parts 115-1--115-99)
       128  Department of Justice (Parts 128-1--128-99)
            Subtitle D--Other Provisions Relating to Property 
                Management [Reserved]
            Subtitle E--Federal Information Resources Management 
                Regulations System
       201  Federal Information Resources Management Regulation 
                (Parts 201-1--201-99) [Reserved]
            Subtitle F--Federal Travel Regulation System
       301  Travel Allowances (Parts 301-1--301-99)
       302  Relocation Allowances (Parts 302-1--302-99)
       303  Payment of Expenses Connected with the Death of 
                Certain Employees (Parts 303-1--303-2)
       304  Payment from a Non-Federal Source for Travel Expenses 
                (Parts 304-1--304-99)

                        Title 42--Public Health

         I  Public Health Service, Department of Health and Human 
                Services (Parts 1--199)
        IV  Health Care Financing Administration, Department of 
                Health and Human Services (Parts 400--499)
         V  Office of Inspector General-Health Care, Department of 
                Health and Human Services (Parts 1000--1999)

[[Page 431]]

                   Title 43--Public Lands: Interior

            Subtitle A--Office of the Secretary of the Interior 
                (Parts 1--199)
            Subtitle B--Regulations Relating to Public Lands
         I  Bureau of Reclamation, Department of the Interior 
                (Parts 200--499)
        II  Bureau of Land Management, Department of the Interior 
                (Parts 1000--9999)
       III  Utah Reclamation Mitigation and Conservation 
                Commission (Parts 10000--10005)

             Title 44--Emergency Management and Assistance

         I  Federal Emergency Management Agency (Parts 0--399)
        IV  Department of Commerce and Department of 
                Transportation (Parts 400--499)

                       Title 45--Public Welfare

            Subtitle A--Department of Health and Human Services, 
                General Administration (Parts 1--199)
            Subtitle B--Regulations Relating to Public Welfare
        II  Office of Family Assistance (Assistance Programs), 
                Administration for Children and Families, 
                Department of Health and Human Services (Parts 
                200--299)
       III  Office of Child Support Enforcement (Child Support 
                Enforcement Program), Administration for Children 
                and Families, Department of Health and Human 
                Services (Parts 300--399)
        IV  Office of Refugee Resettlement, Administration for 
                Children and Families Department of Health and 
                Human Services (Parts 400--499)
         V  Foreign Claims Settlement Commission of the United 
                States, Department of Justice (Parts 500--599)
        VI  National Science Foundation (Parts 600--699)
       VII  Commission on Civil Rights (Parts 700--799)
      VIII  Office of Personnel Management (Parts 800--899)
         X  Office of Community Services, Administration for 
                Children and Families, Department of Health and 
                Human Services (Parts 1000--1099)
        XI  National Foundation on the Arts and the Humanities 
                (Parts 1100--1199)
       XII  ACTION (Parts 1200--1299)
      XIII  Office of Human Development Services, Department of 
                Health and Human Services (Parts 1300--1399)
       XVI  Legal Services Corporation (Parts 1600--1699)
      XVII  National Commission on Libraries and Information 
                Science (Parts 1700--1799)
     XVIII  Harry S. Truman Scholarship Foundation (Parts 1800--
                1899)
       XXI  Commission on Fine Arts (Parts 2100--2199)
      XXII  Christopher Columbus Quincentenary Jubilee Commission 
                (Parts 2200--2299)
     XXIII  Arctic Research Commission (Part 2301)

[[Page 432]]

      XXIV  James Madison Memorial Fellowship Foundation (Parts 
                2400--2499)
       XXV  Corporation for National and Community Service (Parts 
                2500--2599)

                          Title 46--Shipping

         I  Coast Guard, Department of Transportation (Parts 1--
                199)
        II  Maritime Administration, Department of Transportation 
                (Parts 200--399)
       III  Saint Lawrence Seaway Development Corporation (Great 
                Lakes Pilotage), Department of Transportation 
                (Parts 400--499)
        IV  Federal Maritime Commission (Parts 500--599)

                      Title 47--Telecommunication

         I  Federal Communications Commission (Parts 0--199)
        II  Office of Science and Technology Policy and National 
                Security Council (Parts 200--299)
       III  National Telecommunications and Information 
                Administration, Department of Commerce (Parts 
                300--399)

           Title 48--Federal Acquisition Regulations System

         1  Federal Acquisition Regulation (Parts 1--99)
         2  Department of Defense (Parts 200--299)
         3  Department of Health and Human Services (Parts 300--
                399)
         4  Department of Agriculture (Parts 400--499)
         5  General Services Administration (Parts 500--599)
         6  Department of State (Parts 600--699)
         7  Agency for International Development (Parts 700--799)
         8  Department of Veterans Affairs (Parts 800--899)
         9  Department of Energy (Parts 900--999)
        10  Department of the Treasury (Parts 1000--1099)
        12  Department of Transportation (Parts 1200--1299)
        13  Department of Commerce (Parts 1300--1399)
        14  Department of the Interior (Parts 1400--1499)
        15  Environmental Protection Agency (Parts 1500--1599)
        16  Office of Personnel Management Federal Employees 
                Health Benefits Acquisition Regulation (Parts 
                1600--1699)
        17  Office of Personnel Management (Parts 1700--1799)
        18  National Aeronautics and Space Administration (Parts 
                1800--1899)
        19  United States Information Agency (Parts 1900--1999)
        20  Nuclear Regulatory Commission (Parts 2000--2099)
        21  Office of Personnel Management, Federal Employees 
                Group Life Insurance Federal Acquisition 
                Regulation (Parts 2100--2199)
        23  Social Security Administration (Parts 2300--2399)

[[Page 433]]

        24  Department of Housing and Urban Development (Parts 
                2400--2499)
        25  National Science Foundation (Parts 2500--2599)
        28  Department of Justice (Parts 2800--2899)
        29  Department of Labor (Parts 2900--2999)
        34  Department of Education Acquisition Regulation (Parts 
                3400--3499)
        35  Panama Canal Commission (Parts 3500--3599)
        44  Federal Emergency Management Agency (Parts 4400--4499)
        51  Department of the Army Acquisition Regulations (Parts 
                5100--5199)
        52  Department of the Navy Acquisition Regulations (Parts 
                5200--5299)
        53  Department of the Air Force Federal Acquisition 
                Regulation Supplement (Parts 5300--5399)
        54  Defense Logistics Agency, Department of Defense (Part 
                5452)
        57  African Development Foundation (Parts 5700--5799)
        61  General Services Administration Board of Contract 
                Appeals (Parts 6100--6199)
        63  Department of Transportation Board of Contract Appeals 
                (Parts 6300--6399)
        99  Cost Accounting Standards Board, Office of Federal 
                Procurement Policy, Office of Management and 
                Budget (Parts 9900--9999)

                       Title 49--Transportation

            Subtitle A--Office of the Secretary of Transportation 
                (Parts 1--99)
            Subtitle B--Other Regulations Relating to 
                Transportation
         I  Research and Special Programs Administration, 
                Department of Transportation (Parts 100--199)
        II  Federal Railroad Administration, Department of 
                Transportation (Parts 200--299)
       III  Federal Highway Administration, Department of 
                Transportation (Parts 300--399)
        IV  Coast Guard, Department of Transportation (Parts 400--
                499)
         V  National Highway Traffic Safety Administration, 
                Department of Transportation (Parts 500--599)
        VI  Federal Transit Administration, Department of 
                Transportation (Parts 600--699)
       VII  National Railroad Passenger Corporation (AMTRAK) 
                (Parts 700--799)
      VIII  National Transportation Safety Board (Parts 800--999)
         X  Surface Transportation Board, Department of 
                Transportation (Parts 1000--1399)

[[Page 434]]

                   Title 50--Wildlife and Fisheries

         I  United States Fish and Wildlife Service, Department of 
                the Interior (Parts 1--199)
        II  National Marine Fisheries Service, National Oceanic 
                and Atmospheric Administration, Department of 
                Commerce (Parts 200--299)
       III  International Regulatory Agencies (Fishing and 
                Whaling) (Parts 300--399)
        IV  Joint Regulations (United States Fish and Wildlife 
                Service, Department of the Interior and National 
                Marine Fisheries Service, National Oceanic and 
                Atmospheric Administration, Department of 
                Commerce); Endangered Species Committee 
                Regulations (Parts 400--499)
         V  Marine Mammal Commission (Parts 500--599)
        VI  Fishery Conservation and Management, National Oceanic 
                and Atmospheric Administration, Department of 
                Commerce (Parts 600--699)

                      CFR Index and Finding Aids

            Subject/Agency Index
            List of Agency Prepared Indexes
            Parallel Tables of Statutory Authorities and Rules
            Acts Requiring Publication in the Federal Register
            List of CFR Titles, Chapters, Subchapters, and Parts
            Alphabetical List of Agencies Appearing in the CFR



[[Page 435]]





           Alphabetical List of Agencies Appearing in the CFR



                   (Revised as of September 30, 1996)

                                                  CFR Title, Subtitle or
                     Agency                               Chapter

ACTION                                            45, XII
Administrative Committee of the Federal Register  1, I
Advanced Research Projects Agency                 32, I
Advisory Commission on Intergovernmental          5, VII
     Relations
Advisory Committee on Federal Pay                 5, IV
Advisory Council on Historic Preservation         36, VIII
African Development Foundation                    22, XV
  Federal Acquisition Regulation                  48, 57
Agency for International Development              22, II
  Federal Acquisition Regulation                  48, 7
Agricultural Marketing Service                    7, I, IX, X, XI
Agricultural Research Service                     7, V
Agriculture Department
  Agricultural Marketing Service                  7, I, IX, X, XI
  Agricultural Research Service                   7, V
  Animal and Plant Health Inspection Service      7, III; 9, I
  Commodity Credit Corporation                    7, XIV
  Cooperative State Research, Education, and      7, XXXIV
       Extension Service
  Economic Analysis Staff                         7, XXXIX
  Economic Research Service                       7, XXXVII
  Economics Management Staff                      7, XL
  Energy, Office of                               7, XXIX
  Environmental Quality, Office of                7, XXXI
  Farm Service Agency                             7, VII, XVIII
  Federal Acquisition Regulation                  48, 4
  Federal Crop Insurance Corporation              7, IV
  Finance and Management, Office of               7, XXX
  Food and Consumer Service                       7, II
  Food Safety and Inspection Service              9, III
  Foreign Agricultural Service                    7, XV
  Forest Service                                  36, II
  Grain Inspection, Packers and Stockyards        7, VIII; 9, II
       Administration
  Information Resources Management, Office of     7, XXVII
  Inspector General, Office of                    7, XXVI
  National Agricultural Library                   7, XLI
  National Agricultural Statistics Service        7, XXXVI
  Natural Resources Conservation Service          7, VI
  Operations, Office of                           7, XXVIII
  Rural Business-Cooperative Service              7, XVIII, XLII
  Rural Development Administration                7, XLII
  Rural Housing Service                           7, XVIII
  Rural Telephone Bank                            7, XVI
  Rural Utilities Service                         7, XVII, XVIII, XLII
  Secretary of Agriculture, Office of             7, Subtitle A
  Transportation, Office of                       7, XXXIII
  World Agricultural Outlook Board                7, XXXVIII
Air Force Department                              32, VII
  Federal Acquisition Regulation Supplement       48, 53
Alaska Natural Gas Transportation System, Office  10, XV
     of the Federal Inspector
Alcohol, Tobacco and Firearms, Bureau of          27, I
AMTRAK                                            49, VII

[[Page 436]]

American Battle Monuments Commission              36, IV
Animal and Plant Health Inspection Service        7, III; 9, I
Appalachian Regional Commission                   5, IX
Architectural and Transportation Barriers         36, XI
     Compliance Board
Arctic Research Commission                        45, XXIII
Arms Control and Disarmament Agency, United       22, VI
     States
Army Department                                   32, V
  Engineers, Corps of                             33, II; 36, III
  Federal Acquisition Regulation                  48, 51
Assassination Records Review Board                36, XIV
Benefits Review Board                             20, VII
Bilingual Education and Minority Languages        34, V
     Affairs, Office of
Blind or Severely Disabled, Committee for         41, 51
     Purchase From People Who Are
Board for International Broadcasting              22, XIII
Census Bureau                                     15, I
Central Intelligence Agency                       32, XIX
Child Support Enforcement, Office of              45, III
Children and Families, Administration for         45, II, III, IV, X
Christopher Columbus Quincentenary Jubilee        45, XXII
     Commission
Civil Rights, Commission on                       45, VII
Civil Rights, Office for                          34, I
Coast Guard                                       33, I; 46, I; 49, IV
Commerce Department                               44, IV
  Census Bureau                                   15, I`
  Economic Affairs, Under Secretary               37, V
  Economic Analysis, Bureau of                    15, VIII
  Economic Development Administration             13, III
  Emergency Management and Assistance             44, IV
  Export Administration, Bureau of                15, VII
  Federal Acquisition Regulation                  48, 13
  Fishery Conservation and Management             50, VI
  Foreign-Trade Zones Board                       15, IV
  International Trade Administration              15, III; 19, III
  National Institute of Standards and Technology  15, II
  National Marine Fisheries Service               50, II, IV
  National Oceanic and Atmospheric                15, IX; 50, II, III, IV, 
       Administration                             VI
  National Telecommunications and Information     15, XXIII; 47, III
       Administration
  National Weather Service                        15, IX
  Patent and Trademark Office                     37, I
  Productivity, Technology and Innovation,        37, IV
       Assistant Secretary for
  Secretary of Commerce, Office of                15, Subtitle A
  Technology, Under Secretary for                 37, V
  Technology Administration                       15, XI
  Technology Policy, Assistant Secretary for      37, IV
Commercial Space Transportation                   14, III
Commodity Credit Corporation                      7, XIV
Commodity Futures Trading Commission              5, XLI; 17, I
Community Planning and Development, Office of     24, V, VI
     Assistant Secretary for
Community Services, Office of                     45, X
Comptroller of the Currency                       12, I
Construction Industry Collective Bargaining       29, IX
     Commission
Consumer Product Safety Commission                16, II
Cooperative State Research, Education, and        7, XXXIV
     Extension Service
Copyright Office                                  37, II
Cost Accounting Standards Board                   48, 99
Council on Environmental Quality                  40, V
Customs Service, United States                    19, I
Defense Contract Audit Agency                     32, I
Defense Department                                5, XXVI; 32, Subtitle A
  Advanced Research Projects Agency               32, I
  Air Force Department                            32, VII
  Army Department                                 32, V; 33, II; 36, III, 
                                                  48, 51

[[Page 437]]

  Defense Intelligence Agency                     32, I
  Defense Logistics Agency                        32, I, XII; 48, 54
  Defense Mapping Agency                          32, I
  Engineers, Corps of                             33, II; 36, III
  Federal Acquisition Regulation                  48, 2
  Navy Department                                 32, VI; 48, 52
  Secretary of Defense, Office of                 32, I
Defense Contract Audit Agency                     32, I
Defense Intelligence Agency                       32, I
Defense Logistics Agency                          32, XII; 48, 54
Defense Mapping Agency                            32, I
Defense Nuclear Facilities Safety Board           10, XVII
Delaware River Basin Commission                   18, III
Drug Enforcement Administration                   21, II
East-West Foreign Trade Board                     15, XIII
Economic Affairs, Under Secretary                 37, V
Economic Analysis, Bureau of                      15, VIII
Economic Analysis Staff                           7, XXXIX
Economic Development Administration               13, III
Economics Management Staff                        7, XL
Economic Research Service                         7, XXXVII
Education, Department of                          5, LIII
  Bilingual Education and Minority Languages      34, V
       Affairs, Office of
  Civil Rights, Office for                        34, I
  Educational Research and Improvement, Office    34, VII
       of
  Elementary and Secondary Education, Office of   34, II
  Federal Acquisition Regulation                  48, 34
  Postsecondary Education, Office of              34, VI
  Secretary of Education, Office of               34, Subtitle A
  Special Education and Rehabilitative Services,  34, III
       Office of
  Vocational and Adult Education, Office of       34, IV
Educational Research and Improvement, Office of   34, VII
Elementary and Secondary Education, Office of     34, II
Employees' Compensation Appeals Board             20, IV
Employees Loyalty Board                           5, V
Employment and Training Administration            20, V
Employment Standards Administration               20, VI
Endangered Species Committee                      50, IV
Energy, Department of                             5, XXIII; 10, II, III, X
  Federal Acquisition Regulation                  48, 9
  Federal Energy Regulatory Commission            5, XXIV; 18, I
  Property Management Regulations                 41, 109
Energy, Office of                                 7, XXIX
Engineers, Corps of                               33, II; 36, III
Engraving and Printing, Bureau of                 31, VI
Enrichment Corporation, United States             10, XI
Environmental Protection Agency                   5, LIV; 40, I
  Federal Acquisition Regulation                  48, 15
  Property Management Regulations                 41, 115
Environmental Quality, Office of                  7, XXXI
Equal Employment Opportunity Commission           5, LXII; 29, XIV
Equal Opportunity, Office of Assistant Secretary  24, I
     for
Executive Office of the President                 3, I
  Administration, Office of                       5, XV
  Environmental Quality, Council on               40, V
  Management and Budget, Office of                25, III, LXXVII; 48, 99
  National Drug Control Policy, Office of         21, III
  National Security Council                       32, XXI; 47, 2
  Presidential Documents                          3
  Science and Technology Policy, Office of        32, XXIV; 47, II
  Trade Representative, Office of the United      15, XX
       States
Export Administration, Bureau of                  15, VII
Export-Import Bank of the United States           5, LII; 12, IV
Family Assistance, Office of                      45, II
Farm Credit Administration                        5, XXXI; 12, VI
Farm Credit System Insurance Corporation          5, XXX; 12, XIV

[[Page 438]]

Farm Service Agency                               7, VII, XVIII
Farmers Home Administration                       7, XVIII
Federal Acquisition Regulation                    48, 1
Federal Aviation Administration                   14, I
  Commercial Space Transportation                 14, III
Federal Claims Collection Standards               4, II
Federal Communications Commission                 47, I
Federal Contract Compliance Programs, Office of   41, 60
Federal Crop Insurance Corporation                7, IV
Federal Deposit Insurance Corporation             5, XXII; 12, III
Federal Election Commission                       11, I
Federal Emergency Management Agency               44, I
  Federal Acquisition Regulation                  48, 44
Federal Employees Group Life Insurance Federal    48, 21
     Acquisition Regulation
Federal Employees Health Benefits Acquisition     48, 16
     Regulation
Federal Energy Regulatory Commission              5, XXIV; 18, I
Federal Financial Institutions Examination        12, XI
     Council
Federal Financing Bank                            12, VIII
Federal Highway Administration                    23, I, II; 49, III
Federal Home Loan Mortgage Corporation            1, IV
Federal Housing Enterprise Oversight Office       12, XVII
Federal Housing Finance Board                     12, IX
Federal Inspector for the Alaska Natural Gas      10, XV
     Transportation System, Office of
Federal Labor Relations Authority, and General    5, XIV; 22, XIV
     Counsel of the Federal Labor Relations 
     Authority
Federal Law Enforcement Training Center           31, VII
Federal Maritime Commission                       46, IV
Federal Mediation and Conciliation Service        29, XII
Federal Mine Safety and Health Review Commission  5, LXXIV; 29, XXVII
Federal Pay, Advisory Committee on                5, IV
Federal Prison Industries, Inc.                   28, III
Federal Procurement Policy Office                 48, 99
Federal Property Management Regulations           41, 101
Federal Property Management Regulations System    41, Subtitle C
Federal Railroad Administration                   49, II
Federal Register, Administrative Committee of     1, I
Federal Register, Office of                       1, II
Federal Reserve System                            12, II
Federal Retirement Thrift Investment Board        5, VI, LXXVI
Federal Service Impasses Panel                    5, XIV
Federal Trade Commission                          5, XLVII; 16, I
Federal Transit Administration                    49, VI
Federal Travel Regulation System                  41, Subtitle F
Finance and Management, Office of                 7, XXX
Fine Arts, Commission on                          45, XXI
Fiscal Service                                    31, II
Fish and Wildlife Service, United States          50, I, IV
Fishery Conservation and Management               50, VI
Fishing and Whaling, International Regulatory     50, III
     Agencies
Food and Drug Administration                      21, I
Food and Consumer Service                         7, II
Food Safety and Inspection Service                9, III
Foreign Agricultural Service                      7, XV
Foreign Assets Control, Office of                 31, V
Foreign Claims Settlement Commission of the       45, V
     United States
Foreign Service Grievance Board                   22, IX
Foreign Service Impasse Disputes Panel            22, XIV
Foreign Service Labor Relations Board             22, XIV
Foreign-Trade Zones Board                         15, IV
Forest Service                                    36, II
General Accounting Office                         4, I, II
General Services Administration
  Contract Appeals, Board of                      48, 61
  Federal Acquisition Regulation                  48, 5
  Federal Property Management Regulations System  41, 101, 105

[[Page 439]]

  Federal Travel Regulation System                41, Subtitle F
  Payment From a Non-Federal Source for Travel    41, 304
       Expenses
  Payment of Expenses Connected With the Death    41, 303
       of Certain Employees
  Relocation Allowances                           41, 302
  Travel Allowances                               41, 301
Geological Survey                                 30, IV
Government Ethics, Office of                      5, XVI
Government National Mortgage Association          24, III
Grain Inspection, Packers and Stockyards          7, VIII; 9, II
     Administration
Great Lakes Pilotage                              46, III
Harry S. Truman Scholarship Foundation            45, XVIII
Health and Human Services, Department of          5, XLV; 45, Subtitle A
  Child Support Enforcement, Office of            45, III
  Children and Families, Administration for       45, II, III, IV, X
  Community Services, Office of                   45, X
  Family Assistance, Office of                    45, II
  Federal Acquisition Regulation                  48, 3
  Food and Drug Administration                    21, I
  Health Care Financing Administration            42, IV
  Human Development Services, Office of           45, XIII
  Indian Health Service                           25, V
  Inspector General (Health Care), Office of      42, V
  Public Health Service                           42, I
  Refugee Resettlement, Office of                 45, IV
Health Care Financing Administration              42, IV
Housing and Urban Development, Department of      5, LXV; 24, Subtitle B
  Community Planning and Development, Office of   24, V, VI
       Assistant Secretary for
  Equal Opportunity, Office of Assistant          24, I
       Secretary for
  Federal Acquisition Regulation                  48, 24
  Federal Housing Enterprise Oversight, Office    12, XVII
       of
  Government National Mortgage Association        24, III
  Housing--Federal Housing Commissioner, Office   24, II, VIII, X, XX
       of Assistant Secretary for
  Inspector General, Office of                    24, XII
  Public and Indian Housing, Office of Assistant  24, IX
       Secretary for
  Secretary, Office of                            24, Subtitle A, VII
Housing--Federal Housing Commissioner, Office of  24, II, VIII, X, XX
     Assistant Secretary for
Human Development Services, Office of             45, XIII
Immigration and Naturalization Service            8, I
Independent Counsel, Office of                    28, VII
Indian Affairs, Bureau of                         25, I, V
Indian Affairs, Office of the Assistant           25, VI
     Secretary
Indian Arts and Crafts Board                      25, II
Indian Health Service                             25, V
Information Agency, United States                 22, V
  Federal Acquisition Regulation                  48, 19
Information Resources Management, Office of       7, XXVII
Information Security Oversight Office, National   32, XX
     Archives and Records Administration
Inspector General
  Agriculture Department                          7, XXVI
  Health and Human Services Department            42, V
  Housing and Urban Development Department        24, XII
Institute of Peace, United States                 22, XVII
Inter-American Foundation                         5, LXIII; 22, X
Intergovernmental Relations, Advisory Commission  5, VII
     on
Interior Department
  Endangered Species Committee                    50, IV
  Federal Acquisition Regulation                  48, 14
  Federal Property Management Regulations System  41, 114
  Fish and Wildlife Service, United States        50, I, IV
  Geological Survey                               30, IV
  Indian Affairs, Bureau of                       25, I, V
  Indian Affairs, Office of the Assistant         25, VI
     Secretary
[[Page 440]]

  Indian Arts and Crafts Board                    25, II
  Land Management, Bureau of                      43, II
  Minerals Management Service                     30, II
  Mines, Bureau of                                30, VI
  National Indian Gaming Commission               25, III
  National Park Service                           36, I
  Reclamation, Bureau of                          43, I
  Secretary of the Interior, Office of            43, Subtitle A
  Surface Mining and Reclamation Appeals, Board   30, III
       of
  Surface Mining Reclamation and Enforcement,     30, VII
       Office of
Internal Revenue Service                          26, I
International Boundary and Water Commission,      22, XI
     United States and Mexico, United States 
     Section
International Development, Agency for             22, II
  Federal Acquisition Regulation                  48, 7
International Development Cooperation Agency,     22, XII
     United States
  International Development, Agency for           22, II; 48, 7
  Overseas Private Investment Corporation         5, XXXIII; 22, VII
International Investment, Office of               31, VIII
International Joint Commission, United States     22, IV
     and Canada
International Organizations Employees Loyalty     5, V
     Board
International Regulatory Agencies (Fishing and    50, III
     Whaling)
International Trade Administration                15, III; 19, III
International Trade Commission, United States     19, II
Interstate Commerce Commission                    5, XL
James Madison Memorial Fellowship Foundation      45, XXIV
Japan-United States Friendship Commission         22, XVI
Joint Board for the Enrollment of Actuaries       20, VIII
Justice Department                                28, I
  Drug Enforcement Administration                 21, II
  Federal Acquisition Regulation                  48, 28
  Federal Claims Collection Standards             4, II
  Federal Prison Industries, Inc.                 28, III
  Foreign Claims Settlement Commission of the     45, V
       United States
  Immigration and Naturalization Service          8, I
  Offices of Independent Counsel                  28, VI
  Prisons, Bureau of                              28, V
  Property Management Regulations                 41, 128
Labor Department
  Benefits Review Board                           20, VII
  Employees' Compensation Appeals Board           20, IV
  Employment and Training Administration          20, V
  Employment Standards Administration             20, VI
  Federal Acquisition Regulation                  48, 29
  Federal Contract Compliance Programs, Office    41, 60
       of
  Federal Procurement Regulations System          41, 50
  Labor-Management Relations and Cooperative      29, II
       Programs, Bureau of
  Labor-Management Programs, Office of            29, IV
  Mine Safety and Health Administration           30, I
  Occupational Safety and Health Administration   29, XVII
  Pension and Welfare Benefits Administration     29, XXV
  Public Contracts                                41, 50
  Secretary of Labor, Office of                   29, Subtitle A
  Veterans' Employment and Training, Office of    41, 61; 20, IX
       the Assistant Secretary for
  Wage and Hour Division                          29, V
  Workers' Compensation Programs, Office of       20, I
Labor-Management Relations and Cooperative        29, II
     Programs, Bureau of
Labor-Management Programs, Office of              29, IV
Land Management, Bureau of                        43, II
Legal Services Corporation                        45, XVI
Library of Congress                               36, VII
  Copyright Office                                37, II

[[Page 441]]

Management and Budget, Office of                  5, III, LXXVII; 48, 99
Marine Mammal Commission                          50, V
Maritime Administration                           46, II
Merit Systems Protection Board                    5, II
Micronesian Status Negotiations, Office for       32, XXVII
Mine Safety and Health Administration             30, I
Minerals Management Service                       30, II
Mines, Bureau of                                  30, VI
Minority Business Development Agency              15, XIV
Miscellaneous Agencies                            1, IV
Monetary Offices                                  31, I
National Aeronautics and Space Administration     5, LIX; 14, V
  Federal Acquisition Regulation                  48, 18
National Agricultural Library                     7, XLI
National Agricultural Statistics Service          7, XXXVI
National Archives and Records Administration      5, LXVI; 36, XII
  Information Security Oversight Office           32, XX
National Bureau of Standards                      15, II
National Capital Planning Commission              1, IV
National Commission for Employment Policy         1, IV
National Commission on Libraries and Information  45, XVII
     Science
National and Community Service, Corporation for   45, XXV
National Council on Disability                    34, XII
National Credit Union Administration              12, VII
National Drug Control Policy, Office of           21, III
National Foundation on the Arts and the           45, XI
     Humanities
National Highway Traffic Safety Administration    23, II, III; 49, V
National Indian Gaming Commission                 25, III
National Institute for Literacy                   34, XI
National Institute of Standards and Technology    15, II
National Labor Relations Board                    29, I
National Marine Fisheries Service                 50, II, IV
National Mediation Board                          29, X
National Oceanic and Atmospheric Administration   15, IX; 50, II, III, IV, 
                                                  VI
National Park Service                             36, I
National Railroad Adjustment Board                29, III
National Railroad Passenger Corporation (AMTRAK)  49, VII
National Science Foundation                       45, VI
  Federal Acquisition Regulation                  48, 25
National Security Council                         32, XXI
National Security Council and Office of Science   47, II
     and Technology Policy
National Telecommunications and Information       15, XXIII; 47, III
     Administration
National Transportation Safety Board              49, VIII
National Weather Service                          15, IX
Natural Resources Conservation Service            7, VI
Navajo and Hopi Indian Relocation, Office of      25, IV
Navy Department                                   32, VI
  Federal Acquisition Regulation                  48, 52
Neighborhood Reinvestment Corporation             24, XXV
Nuclear Regulatory Commission                     5, XLVIII; 10, I
  Federal Acquisition Regulation                  48, 20
Occupational Safety and Health Administration     29, XVII
Occupational Safety and Health Review Commission  29, XX
Offices of Independent Counsel                    28, VI
Operations Office                                 7, XXVIII
Overseas Private Investment Corporation           5, XXXIII; 22, VII
Panama Canal Commission                           48, 35
Panama Canal Regulations                          35, I
Patent and Trademark Office                       37, I
Payment From a Non-Federal Source for Travel      41, 304
     Expenses
Payment of Expenses Connected With the Death of   41, 303
     Certain Employees
Peace Corps                                       22, III
Pennsylvania Avenue Development Corporation       36, IX
Pension and Welfare Benefits Administration       29, XXV

[[Page 442]]

Pension Benefit Guaranty Corporation              29, XL
Personnel Management, Office of                   5, I; 45, VIII
  Federal Acquisition Regulation                  48, 17
  Federal Employees Group Life Insurance Federal  48, 21
       Acquisition Regulation
  Federal Employees Health Benefits Acquisition   48, 16
       Regulation
Postal Rate Commission                            5, XLVI; 39, III
Postal Service, United States                     5, LX; 39, I
Postsecondary Education, Office of                34, VI
President's Commission on White House             1, IV
     Fellowships
Presidential Commission on the Assignment of      32, XXIX
     Women in the Armed Forces
Presidential Documents                            3
Prisons, Bureau of                                28, V
Productivity, Technology and Innovation,          37, IV
     Assistant Secretary
Public Contracts, Department of Labor             41, 50
Public and Indian Housing, Office of Assistant    24, IX
     Secretary for
Public Health Service                             42, I
Railroad Retirement Board                         20, II
Reclamation, Bureau of                            43, I
Refugee Resettlement, Office of                   45, IV
Regional Action Planning Commissions              13, V
Relocation Allowances                             41, 302
Research and Special Programs Administration      49, I
Rural Business-Cooperative Service                7, XVIII, XLII
Rural Development Administration                  7, XLII
Rural Housing Service                             7, XVIII
Rural Telephone Bank                              7, XVI
Rural Utilities Service                           7, XVII, XVIII, XLII
Saint Lawrence Seaway Development Corporation     33, IV; 46, III
Science and Technology Policy, Office of          32, XXIV
Science and Technology Policy, Office of, and     47, II
     National Security Council
Secret Service                                    31, IV
Securities and Exchange Commission                17, II
Selective Service System                          32, XVI
Small Business Administration                     13, I
Smithsonian Institution                           36, V
Social Security Administration                    20, III; 48, 23
Soldiers' and Airmen's Home, United States        5, XI
Special Counsel, Office of                        5, VIII
Special Education and Rehabilitative Services,    34, III
     Office of
State Department                                  22, I
  Federal Acquisition Regulation                  48, 6
Surface Mining and Reclamation Appeals, Board of  30, III
Surface Mining Reclamation and Enforcement,       30, VII
     Office of
Surface Transportation Board                      49, X
Susquehanna River Basin Commission                18, VIII
Technology Administration                         15, XI
Technology Policy, Assistant Secretary for        37, IV
Technology, Under Secretary for                   37, V
Tennessee Valley Authority                        5, LXIX; 18, XIII
Thrift Depositor Protection Oversight Board       12, XV
Thrift Supervision Office, Department of the      12, V
     Treasury
Trade Representative, United States, Office of    15, XX
Transportation, Department of                     5, L
  Coast Guard                                     33, I; 46, I; 49, IV
  Commercial Space Transportation                 14, III
  Contract Appeals, Board of                      48, 63
  Emergency Management and Assistance             44, IV
  Federal Acquisition Regulation                  48, 12
  Federal Aviation Administration                 14, I
  Federal Highway Administration                  23, I, II; 49, III
  Federal Railroad Administration                 49, II
  Federal Transit Administration                  49, VI
  Maritime Administration                         46, II

[[Page 443]]

  National Highway Traffic Safety Administration  23, II, III; 49, V
  Research and Special Programs Administration    49, I
  Saint Lawrence Seaway Development Corporation   33, IV; 46, III
  Secretary of Transportation, Office of          14, II; 49, Subtitle A
  Surface Transportation Board                    49, X
Transportation, Office of                         7, XXXIII
Travel Allowances                                 41, 301
Treasury Department                               5, XXI; 17, IV
  Alcohol, Tobacco and Firearms, Bureau of        27, I
  Community Development Financial Institutions    12, XVIII
       Fund
  Comptroller of the Currency                     12, I
  Customs Service, United States                  19, I
  Engraving and Printing, Bureau of               31, VI
  Federal Acquisition Regulation                  48, 10
  Federal Law Enforcement Training Center         31, VII
  Fiscal Service                                  31, II
  Foreign Assets Control, Office of               31, V
  Internal Revenue Service                        26, I
  International Investment, Office of             31, VIII
  Monetary Offices                                31, I
  Secret Service                                  31, IV
  Secretary of the Treasury, Office of            31, Subtitle A
  Thrift Supervision, Office of                   12, V
Truman, Harry S. Scholarship Foundation           45, XVIII
United States and Canada, International Joint     22, IV
     Commission
United States and Mexico, International Boundary  22, XI
     and Water Commission, United States Section
United States Enrichment Corporation              10, XI
Utah Reclamation Mitigation and Conservation      43, III
     Commission
Veterans Affairs Department                       38, I
  Federal Acquisition Regulation                  48, 8
Veterans' Employment and Training, Office of the  41, 61; 20, IX
     Assistant Secretary for
Vice President of the United States, Office of    32, XXVIII
Vocational and Adult Education, Office of         34, IV
Wage and Hour Division                            29, V
Water Resources Council                           18, VI
Workers' Compensation Programs, Office of         20, I
World Agricultural Outlook Board                  7, XXXVIII

[[Page 445]]



List of CFR Sections Affected


All changes in this volume of the Code of Federal Regulations which were 
made by documents published in the Federal Register since January 1, 
1986, are enumerated in the following list. Entries indicate the nature 
of the changes effected. Page numbers refer to Federal Register pages. 
The user should consult the entries for chapters and parts as well as 
sections for revisions.
For the period before January 1, 1986, see the ``List of CFR Sections 
Affected, 1949-1963, 1964-1972, and 1973-1985'' published in seven 
separate volumes.

                                  1986

46 CFR
                                                                   51 FR
                                                                    Page
Chapter I
42  Authority citation revised; section authority citations 
        removed.....................................................9961
42.03-5  (a)(3) revised.............................................9962
47  Added...........................................................9962
50  Authority citation revised; section authority citations 
        removed....................................................15497
50.20-5  (d) revised...............................................15497
67  Authority citation revised.....................................33269
67.05-15  (a) revised..............................................33269
67.19-5  (a)(2) and Note redesignated as (a)(3) and Note; new 
        (a)(2) added; (b) revised..................................33269
67.39-1  (a) revised...............................................33270
67.39-3  Revised...................................................33270
67  Appendix A amended.............................................33270

                                  1987

46 CFR
                                                                   52 FR
                                                                    Page
Chapter I
54.25-10  (a)(1) amended; eff. 11-1-87.............................31626
61.20-17  Revised..................................................39651
61.20-18  Revised..................................................39652
61.20-21  Revised..................................................39652
67  Tonnage measurement certificates...............................31767
69  Authority citation revised; section authority citations 
        removed....................................................15948
69.01-11  Revised..................................................15948
69.01-15  (a) revised..............................................15948
69.01-17  (b) revised..............................................15948
69.01-19  Revised..................................................15948
69.15-39  (a) revised..............................................15948

                                  1988

46 CFR
                                                                   53 FR
                                                                    Page
Chapter I
42  Authority citation revised.....................................37565
42.05-20  Amended..................................................34534
44  Authority citation revised.....................................37565
45  Authority citation revised; section authority citations 
        removed....................................................37565
46  Authority citation revised.....................................37565
46.10-10  (d) amended..............................................34534
46.10-20  (a) amended..............................................34534
46.10-30  (a) amended..............................................34534
47  Authority citation revised.....................................37565
50  Authority citation revised..............................36024, 37565
50.01-1  Removed...................................................36024
50.01-20  (b) revised (OMB numbers)................................17837
    (b) table amended (OMB numbers)................................34297
50.10-20  Amended..................................................34534
50.15-60  (b) amended..............................................34534
50.20-5  (c) amended...............................................34534
52  Authority citation revised.....................................17837

[[Page 446]]

    Authority citation revised; section authority citations 
removed............................................................37565
52.01-10  (a) revised..............................................17837
53  Authority citation revised; section authority citations 
        removed....................................................37565
54  Authority citation revised; section authority citations 
        removed....................................................37566
55  Authority citation revised; section authority citations 
        removed....................................................37566
56  Authority citation revised.....................................17837
    Authority citation revised; section authority citations 
removed............................................................37566
56.50-80  (i) added................................................17837
56.50-95  (d)(1) amended...........................................17837
57  Authority citation revised; section authority citations 
        removed....................................................37566
58  Authority citation revised...............................7748, 17837
    Authority citation revised; section authority citations 
removed............................................................37566
58.01-35  Added....................................................17837
58.20-5  (b) revised................................................7748
59  Authority citation revised.....................................37566
61  Authority citation revised....................................17837,
                                                     32230, 36024, 37566
61.10-5  (f) and (h)(1) revised....................................36024
61.20-5  (b) amended...............................................32231
61.20-17  (d) (2) and (3) redesignated as (d) (3) and (4); new 
        (d)(2) added; (c), (d) introductory text and new (4)(i) 
        revised....................................................32231
61.20-18  (b) amended..............................................32231
61.40-1--61.40-10 (Subpart 61.40)  Added...........................17837
62  Added..........................................................17838
    Authority citation revised.....................................37566
62.25-25  (a) and (d) corrected....................................19090
62.35-5  (b)(5) corrected..........................................19090
62.35-50  (a) table corrected......................................19090
62.50-20  (c) note corrected; (h) correctly designated.............19090
    (a)(3)(iv) and (e)(2) correctly revised........................24270
62.50-30  (a) corrected............................................19090
63  Authority citation revised; section authority citations 
        removed....................................................37566
64  Authority citation revised.....................................37566
67  Authority citation revised.......................17469, 37566, 41168
67.01-1  amended...................................................41168
67.03-5  (a) revised; (d) and (e) added............................17469
67.17-5  (a) and (c)(3) revised....................................41168
67.17-7  (a) and (c)(3) revised....................................41168
67.17-9  (a) and (b) introductory text revised; (c) added..........41169
67.27-3  (b) introductory text revised; Note aded..................41169
68  Authority citation revised.....................................37566
69  Authority citation revised.....................................37566
69.01-11  (b) amended..............................................34534
69.01-17  (b) amended..............................................34534
69.01-20  Added....................................................20622
69.01-21  (b) table amended (OMB numbers)..........................34297

                                  1989

46 CFR
                                                                   54 FR
                                                                    Page
Chapter I
42.03-5  (e) added; eff. 10-6-89...................................36976
42.03-30  (b)(4) added; eff. 10-6-89...............................36976
42.07-75  Revised..................................................50380
42.20-5  (c) introductory text revised; eff. 10-6-89...............36976
44  Heading revised; eff. 10-6-89..................................36976
44.01-1--44.01-20 (Subpart 44.01)  Redesignated as 44.01-1--44.01-
        20 (Subpart A).............................................36976
44.05-1--44.05-35 (Subpart 44.05)  Redesignated as 44.05-1--44.05-
        35 (Subpart B) and heading revised; eff. 10-6-89...........36976
44.300--44.340 (Subpart C)  Added; eff. 10-6-89....................36977
45.9  (b) revised; eff. 10-6-89....................................36977
50.10-23  Added....................................................40597
50.15-1  Heading and (b) revised; (c) removed......................40598
50.15-20  (a) (1) through (13) revised; (a)(14) added..............40598
50.20-5  (d) revised...............................................19571
    (b) and (c) revised; (d) removed; (e) redesignated as (d)......40598
50.20-15  (a)(3) revised...........................................40598
50.20-40  Revised..................................................50380
50.25  Heading revised.............................................40598
50.25-1  Revised; Table 50.25-1(a) removed.........................40598

[[Page 447]]

50.25-3  (a) revised...............................................40598
50.25-5  (a) and (d)(3) revised....................................40598
50.25-7  (a) revised...............................................40599
50.25-10  Revised..................................................40599
50.25-15  Removed..................................................40599
50.25-20  Removed..................................................40599
50.25-25  Removed..................................................40599
50.25-30  Removed..................................................40599
50.25-35  Removed..................................................40599
50.25-40  Removed..................................................40599
54.01-1  Table 54.01-1(a) amended; interim.........................50963
54.01-5  Table 54.01-5(b) revised; interim.........................50963
    (d)(2) revised; interim........................................50964
54.05-6  Revised; interim..........................................50964
54.20-3  (c) and (f) added; interim................................50964
54.25-8  Heading revised; (c) added; interim.......................50964
54.25-10  (a)(2) undesignated text revised; (d) added; interim.....50964
56.01-1--56.01-10 (Subpart 56.01)  Note amended....................40599
56.01-2  Added.....................................................40599
56.01-3  Revised...................................................40602
56.01-5  Table 56.01-5(a) amended..................................40602
56.01-6  Removed...................................................40602
56.01-10  (c)(1) (vii) and (xiii) revised; (c)(1)(xviii) removed; 
        (f) added..................................................40602
56.04-1  Table 56.04-1 amended.....................................40602
56.04-10  Revised..................................................40602
56.07-5  (e) revised; (f) and (g) added............................40602
56.07-10  (c) and (d) (1) and (2) revised; (e) amended.............40602
56.10-5  (b) revised...............................................40602
56.15-1--56.15-10 (Subpart 56.15)  Revised.........................40602
56.20-1  Revised...................................................40604
56.20-9  (a), (b), and (c) revised.................................40604
56.20-15  (b) introductory text and (2)(ii) amended; (c) added.....40604
56.25-5  Revised...................................................40605
56.25-10  (b) revised..............................................40605
56.25-15  (b) and (c) revised; eff. 10-2-89........................36316
    Removed........................................................40599
56.25-20  (a) through (d) revised..................................40605
56.30-5  (b)(3), (c), and (d) revised..............................40605
56.30-10  Figure (b) note amended; (a) and (b) introductory text 
        through (5) revised........................................40605
56.30-20  Heading, (a) through (d) and Table 56.30-20(c) footnotes 
        1 and 2 revised; Table 56.30-20(c) redesignated to (c).....40606
56.30-25  (a), (d), and (f)(2) revised.............................40606
56.30-27  Revised..................................................40606
56.30-40  (a), (b), (e), and (f) revised...........................40606
56.35.1  (a) and (b) revised.......................................40607
56.35-10  Revised..................................................40607
56.35-15  Revised..................................................40607
56.50-1  (c), (g)(1), (2)(iii), (3), and (l) revised...............40607
56.50-5  Removed...................................................40607
56.50-15  (h) revised..............................................40607
56.50-20  (a) and (c) revised......................................40607
56.50-25  (d) amended..............................................40608
56.50-50  (c)(1), (d)(1), (2) Note 1, (f) introductory text, (3), 
        (h), and (k) revised.......................................40608
56.50-55  (b)(1) Table 56.50-55(b)(1), (c), and (e)(1) revised.....40608
56.50-60  Heading, (a), (c), (d) introductory text, (1), (2), (3) 
        introductory text and (i), and (4) revised; (h) through 
        (l) added..................................................40609
56.50-65  Heading, (a), (b), and (d) revised.......................40609
56.50-75  (a)(1) amended...........................................40610
56.50-85  (a)(4-a) removed; (a) (6) through (12) redesignated as 
        (a) (7) through (13); (a) introductory text, (4), (5), new 
        (8), and new (10) revised; new (a)(6) and (b) added........40610
56.50-95  (a)(1), (b)(1), (c), and (e)(3) revised; (i) added.......40610
56.50-96  (a)(2) (ii) and (iv) revised.............................40611
56.50-102  Revised.................................................40611
56.50-105  (a)(1)(iii) and Table 56.50-105 heading revised; Table 
        56.50-105 footnotes 3 and 4 added..........................40611
56.60-1  Heading, (a)(2), and (b) revised; (a) Table 56.60-1 (a) 
        and (b), and (b) Table 56.60-1(b) amended..................40611

[[Page 448]]

56.60-2  (a) Table 56.60-2(a) footnotes (2), (3), (5), (9), and 
        (14) amended...............................................40612
56.60-10  (a) and (c) revised......................................40612
56.60-15  Revised..................................................40612
56.60-20  (a) (1), (4), and (b) revised; (a)(1) footnote 2 removed
                                                                   40612
56.60-25  (a) introductory text, (7)(i) (A) and (B), (8), (10), 
        (c) Table 56.60-25(c), (2), and (5) revised; (a)(1)(ii) 
        and (b)(1) amended; (c) (7) through (10) added; (e) 
        removed; (f) redesignated as (e)...........................40613
56.70-1  Revised...................................................40614
56.70-10  Heading and (b) revised..................................40614
56.70-15  (b) (2), (5) heading, and (7) revised; (c), (d), figure 
        56.70-15(g), and Table 56.70-15 amended....................40614
56.75-5  (a) revised...............................................40615
56.85-10  Table 56.85-10 amended...................................40615
56.95-10  Table 56.95-10 removed; (a) and (c)(2) revised...........40615
56.97-5  (a) revised...............................................40615
58.16-1  (a) and (c) revised; interim...............................6402
58.16-7  Added; interim.............................................6402
61.15-12  Added....................................................40615
67  Authority citation revised.....................................41837
67.01-1  Amended...................................................41837
67.17-3  (c) added; interim........................................41837
67.17-5  (d) revised; interim......................................41837
67.17-7  (d) revised; interim......................................41837
67.23-1  Revised; interim..........................................41837
67.23-3  (b) removed; (c), (d), and (e) redesignated as (b), (c), 
        and (d); interim...........................................41837
67.23-5  Revised; interim..........................................41837
67.23-7  (a) and (b) revised; interim..............................41837
67.23-9  (a) introductory text, (4), (c), and (d) note revised; 
        interim....................................................41837
67.23-11  (c) and note revised; interim............................41838
67.27-5  Removed; interim..........................................41838
67.29-1--67.29-17 (Subpart 67.29)  Revised; interim................41838
67.31-1--67.31-7 (Subpart 67.31)  Revised; interim.................41839
67.33-1--67.33-29 (Subpart 67.33)  Revised; interim................41839
67.35-1--67.35-9 (Subpart 67.35)  Revised; interim.................41840
67.37-1--67.37-7 (Subpart 67.37)  Revised; interim.................41841
67.39-1--67.39-9 (Subpart 67.39)  Revised; interim.................41841
69  Revised; eff. 10-12-89.........................................37657
69.21  Revised.....................................................50380
69.109  (f)(3) corrected...........................................40240
69.117  (e)(2)(ii) corrected.......................................40240
69.119  (o) (1) and (2) corrected..................................40240
69.121  (c)(7) corrected...........................................40240
69.203  (b) corrected..............................................40240

                                  1990

46 CFR
                                                                   55 FR
                                                                    Page
Chapter I
50.05.15  (a)(1) revised...........................................30660
52.01-10  (b) revised; (c) added...................................24236
52.01-135  (d) revised.............................................24236
52.25-15  (d) added................................................24236
52.25-20  Revised..................................................24236
54  Technical correction...........................................43063
54.01-1  Regulation at 54 FR 50963 confirmed.......................41917
54.01-5  Table footnote 6 corrected..................................696
    Table revised..................................................24236
    Regulation at 54 FR 50963 and 50964 confirmed; Table 54.01-
5(b) revised.......................................................41917
54.05-6  Regulation at 54 FR 50964 confirmed.......................41917
54.20-3  Regulation at 54 FR 50964 confirmed.......................41917
54.25-8  Regulation at 54 FR 50964 confirmed.......................41917
54.25-10  Regulation at 54 FR 50964 confirmed......................41917
56.01-2  (b) table corrected.......................................39968
56.01-5  table 56.01-5(a) corrected................................39968
56.20-1  (c)(2) correctly designated...............................39968
56.50-50  (k) corrected............................................39968
56.50-55  (e)(1) corrected.........................................39968
56.50-60  (j) and (l) corrected....................................39968
56.60-1  (b) table 56.60-1(b) corrected.....................39968, 39969
56.70-15  Table 56.70-15 corrected.................................39969
58.16-1  Regulation at 54 FR 6402 confirmed.........................3959

[[Page 449]]

58.16-7  Regulation at 54 FR 6402 confirmed.........................3959
61.30-20  Revised..................................................24237
61.35-1--61.35-3 (Subpart 61.35)  Added............................24237
63  Revised........................................................24238
64  Heading revised................................................37409
64.1  Revised......................................................37409
    Corrected......................................................47477
64.2  Added........................................................37409
    (a) corrected..................................................47477
64.3  Revised......................................................37409
64.5  (a) and (d) revised..........................................37409
64.7  Removed; eff. 9-30-92........................................37409
    (a)(4) amended.................................................37410
64.9  Revised......................................................37409
64.11  Revised.....................................................37410
    (e) corrected..................................................40755
64.13  (a) and (b) footnote 1 amended..............................37410
64.21  Amended.....................................................37410
64.25  (b) amended.................................................37410
64.31  Amended.....................................................37410
64.53  Revised.....................................................37410
64.57--64.71 (Subpart C)  Heading revised..........................37410
64.57  Heading and introductory text revised.......................37410
64.63  (a) amended.................................................37410
    (a) corrected..................................................47477
64.65  Revised.....................................................37410
64.73--64.75 (Subpart D)  Removed; eff. 9-30-92....................37410
64.77--64.85 (Subpart E)  Heading revised..........................37410
64.77  Introductory text revised...................................37410
64.85  Removed.....................................................37410
64.87  Revised.....................................................37410
64.88  Added.......................................................37410
67.03-1--67.03-17 (Subpart 67.03)  Revised.........................51251
67.17-5  (c)(1) revised............................................51252
67.17-7  (c)(1) revised............................................51252
67.17-9  (d) added.................................................51252
67.23-9  (a)(3) revised............................................51252

                                  1991

46 CFR
                                                                   56 FR
                                                                    Page
Chapter I
50.15-1--50.15-60 (Subpart 50.15)  Removed.........................35821
52.01-1--52.01-145 (Subpart 52.01)  Note removed...................35821
52.01-1  (a)(1) removed; redesignated as 52.01-2; new 52.01-1 
        added......................................................35821
52.01-2  Redesignated from 52.01-1 and (a)(1) removed..............35821
53.01-1--53.01-10 (Subpart 53.01)  Note removed....................35821
53.01-1  (a)(1) removed; redesignated as 53.01-3; new 53.01-1 
        added......................................................35821
53.01-3  Redesignated from 53.01-1 and (a)(1) removed..............35821
54.01-1--54.01-40 (Subpart 54.01)  Note 1 and Note 2 removed.......35822
54.01-1  Redesignated as 54.01-2; new 54.01-1 added................35822
54.01-2  Redesignated as 54.01-3; new 54.01-2 redesignated from 
        54.01-1....................................................35822
54.01-3  Removed; new 54.01-3 redesignated from 54.01-2............35822
54.15-1  Heading and (a) revised...................................35822
54.15-5  (a) revised...............................................35822
55.01-1 (Subpart 55.01)  Note removed..............................35822
55.01-1  (a)(1) removed; redesignated as 55.01-3; new 55.01-1 
        added......................................................35822
55.01-3  Redesignated from 55.01-1 and (a)(1) removed..............35822
56.01-2  (b) amended...............................................35822
56.50-55  (a)(1) table correctly added; CFR correction.............48736
56.60-25  (c) revised..............................................35822
57.02-1  Redesignated as 57.02-2; new 57.02-1 added................35823
57.02-2  Redesignated as 57.02-3; new 57.02-2 redesignated from 
        57.02-1....................................................35823
57.02-3  Redesignated as 57.02-4; new 57.02-3 redesignated from 
        57.02-2....................................................35823
57.02-4  Redesignated as 57.02-5; new 57.02-4 redesignted from 
        57.02-3....................................................35823
57.02-5  Redesignated from 57.02-4.................................35823
58.03-1 (Subpart 58.03)  Revised...................................35823
58.10-5  (b)(2) and (3) revised....................................35824
58.60-7  Revised...................................................35824
58.60-9  Revised...................................................35824
59.01-2  Added.....................................................35824

[[Page 450]]

67  Authority citation revised.......................................962
67.01-1  Regulation at 54 FR 41837 confirmed.........................962
67.13-3  (c) through (g) redesignated as (d) through (h); (b) 
        revised; new (c) added.....................................51654
67.13-7  (b) revised...............................................51655
67.17-3  Regulation at 54 FR 41837 confirmed.........................962
67.17-5  Regulation at 54 FR 41837 confirmed.........................962
67.17-7  Regulation at 54 FR 41837 confirmed.........................962
67.23-1  Regulation at 54 FR 41837 confirmed.........................962
67.23-3  Regulation at 54 FR 41837 confirmed; (b) revised............962
67.23-5  Regulation at 54 FR 41837 confirmed.........................962
67.23-7  Regulation at 54 FR 41837 confirmed.........................962
67.23-9  Regulation at 54 FR 41837 confirmed; (a) introductory 
        text and (c) revised.........................................962
67.23-11  Regulation at 54 FR 41838 confirmed; (c) revised...........962
67.27-5  Regulation at 54 FR 41838 confirmed.........................962
67.29-1--67.29-17 (Subpart 67.29)  Regulation at 54 FR 41838 
        confirmed....................................................962
67.29-1  (c) and (d) revised...................................963, 2864
67.29-3  Note added..................................................963
67.29-17  (b) revised; (c) added.....................................963
67.31-1--67.31-7 (Subpart 67.31)  Regulation at 54 FR 41839 
        confirmed....................................................962
67.33-1--67.33-29 (Subpart 67.33)  Regulation at 54 FR 41839 
        confirmed....................................................962
67.33-1  (a) revised.................................................963
67.33-11  (c) revised................................................963
67.35-1--67.35-9 (Subpart 67.35)  Regulation at 54 FR 41840 
        confirmed....................................................962
67.35-3  Revised.....................................................963
67.35-9  Revised.....................................................963
67.37-1--67.37-7 (Subpart 67.37)  Regulation at 54 FR 41841 
        confirmed....................................................962
67.37-5  (c) revised.................................................963
67.39-1--67.39-9 (Subpart 67.39)  Regulation at 54 FR 41841 
        confirmed....................................................962
67.39-1  Revised.....................................................963
67.39-3  Introductory text revised...................................964
67.39-9  (c) revised.................................................964
67  Appendix D revised.............................................51655

                                  1992

46 CFR
                                                                   57 FR
                                                                    Page
Chapter I
44  Exemption......................................................22663
45  Exemption......................................................22663
67  Authority citation revised.....................................44128
67.29-11  Revised..................................................44128
69.5  (a)(4) amended...............................................59938
69.11  (a)(2)(vi) added; (d) revised...............................59938
69.15  (a) revised.................................................59938
69.119  (c) amended................................................59938
69.169  Heading revised............................................59938
69.205  Revised....................................................59938

                                  1993

46 CFR
                                                                   58 FR
                                                                    Page
Chapter I
67  Revised........................................................60266
67.19  (c)(2) corrected............................................65131
67.43  Corrected...................................................65131
67.111  (a) introductory text corrected............................65131
67.113  Introductory text corrected................................65131
67.117  (a) introductory text corrected............................65131
67.141  (a)(1) corrected...........................................65131
67.143  Corrected..................................................65131
67.145  (d) corrected..............................................65131
67.165  (a) corrected..............................................65131
67.173  Corrected..................................................65131
67.217  (a)(3) and (4) corrected...................................65131
67.500--67.550 (Subpart Y)  Heading corrected......................65131
67.500  (a) corrected..............................................65131
67.550  Table corrected............................................65243
67  appendix A corrected...........................................65132
69  Policy statement...............................................57747
    Technical correction...........................................60731

                                  1994

46 CFR
                                                                   59 FR
                                                                    Page
Chapter I
67  Policy statement...............................................24060

[[Page 451]]

    Authority citation revised.....................................49846
67.19  (a) and (b) revised; eff. 10-31-94..........................49846
67.35  Revised; eff. 10-31-94......................................49846
67.36  Redesignated from 67.37 and revised; 10-31-94...............49846
67.37  Redesignated as 67.36; new 67.37 added; eff. 10-31-94.......49846
67.39  (b), (c) and (d) revised; eff. 10-31-94.....................49847
67.119  (e) revised; eff. 10-31-94.................................49847
67.145  (a) amended; eff. 10-31-94.................................49847
67.171  (d) revised; eff. 10-31-94.................................49847
67.321  Revised; eff. 10-31-94.....................................49847
67.539  Revised; eff. 10-31-94.....................................49847
68  Policy statement...............................................36088
    Technical correction...........................................39635
69  Authority citation revised.....................................50508
69.15  (a) amended.................................................50508

                                  1995

46 CFR
                                                                   60 FR
                                                                    Page
Chapter I
50  Authority citation revised..............................24772, 48049
50.01-10  (b) amended; eff. 10-18-95...............................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
50.05-15  (a) introductory text amended; (c) removed; eff. 10-18-
        95.........................................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
50.10-35  Added....................................................24772
50.20-5  (b) revised; (c) removed; (d) redesignated as (c); eff. 
        10-18-95...................................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
    (c) amended....................................................50462
50.25-1  (e) amended...............................................50462
50.30-10  Revised; eff. 10-18-95...................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
52.01-1  (a) amended...............................................50462
52.01-3  (a)(10) added.............................................24772
52.01-110  Heading revised; (h) added..............................24772
53.01-1  (a) amended...............................................50462
54  Authority citation revised.....................................48049
54.01-1  (a) amended...............................................50462
54.01-10  (a) amended; eff. 10-18-95...............................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
54.05-30  (b) and (c) amended......................................50462
54.15-5  (i) amended; eff. 10-18-95................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
54.15-25  (c-1) amended............................................50462
55  Removed; eff. 10-18-95.........................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
56  Authority citation revised..............................24772, 48049
56.01-2  (b) amended; eff. 10-18-95................................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
56.01-10  (c)(2)(ii) removed; (c)(2)(iii) and (iv) redesignated as 
        (c)(2)(ii) and (iii); eff. 10-18-95........................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
56.04-1  Table amended; eff. 10-18-95..............................48049
    Regulation at 60 FR 48049 eff. date corrected to 10-1-95.......50120
56.07-10  (e) amended; eff. 10-18-95...............................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.15-5  Heading and (c)(1)(ii) revised............................24772
56.20-9  (b) amended; eff. 10-18-95................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.20-15  (c)(3) amended...........................................50462
56.30-5  (b)(4) amended; eff. 10-18-95.............................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.30-25  (f)(2) note added........................................24772
56.50-15  (k) added................................................24772
56.50-25  (a) amended; eff. 10-18-95...............................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.50-50  (a)(4), (5), (c)(4) and (d)(2) Note 6 added; (c)(1) and 
        (2) revised; (d)(2) and (h) amended........................24772

[[Page 452]]

56.50-55  (a) revised..............................................24773
56.50-60  (b) and (l) revised; (d)(1)(i), (m) and (n) added........24774
56.50-65  Heading and (h) revised..................................24774
56.50-70  (j) revised..............................................24774
56.50-80  Heading and (h) revised..................................24774
56.50-85  (a)(7)(iii) and (iv) removed; (a)(7)(v) redesignated as 
        (a)(7)(iii); heading, (a)(7)(ii), new (iii) and (11) 
        revised....................................................24774
    (a)(1) amended; eff. 10-18-95..................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.50-90  (a) revised; (c) and (d) redesignated as (e) and (f); 
        new (c) and new (d) added..................................24774
56.50-101  Removed; eff. 10-18-95..................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.50-102  Removed; eff. 10-18-95..................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.50-105  Heading, (a)(5) and (b)(5) revised......................24775
56.60-2  Amended; eff. 10-18-95....................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
56.60-25  (a)(3) and (b)(1) revised; (a)(11) added.................24775
    (a)(10) and (11) amended.......................................50462
56.70-15  (a)(3) revised; eff. 10-18-95............................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
57  Technical correction...........................................54106
57.02-1  (a) amended...............................................50462
    Corrected......................................................54106
57.02-2  (a)(1) amended; eff. 10-18-95.............................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
57.06-1  (b) and (c) revised; eff. 10-18-95........................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
57.06-4  (a) amended; eff. 10-18-95................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
57.06-5  (a) revised; eff. 10-18-95................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
58  Authority citation revised..............................24775, 48050
58.01-10  Revised..................................................24775
58.01-15  Removed..................................................24775
58.01-25  Revised..................................................24775
58.01-40  Added....................................................24775
58.01-45  Added....................................................24775
58.01-50  Added....................................................24776
58.01-55  Added....................................................24776
58.03-1  (b) amended...............................................24776
    (b) amended; eff. 10-18-95.....................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
    (a) and (b) amended............................................50462
58.05-1  (a) revised...............................................24776
58.05-10  Added....................................................24776
58.10-15  (e) removed; (f) through (j) redesignated as (e) through 
        (i)........................................................24776
58.25-1--58.25-85 (Subpart 58.25)  Revised.........................24776
58.30-5  (d) added.................................................24781
59.01-2  (a) amended...............................................50462
61  Authority citation revised.....................................24781
61.01-1  (a) amended; eff. 10-18-95................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
61.05-10  (a) and (b) revised; table removed; new table added......24781
61.05-15  (a), (b), (c)(1), (f) and (g) revised....................24782
61.05-20  Revised..................................................24782
61.10-1  (a) designation and (b) removed; eff. 10-18-95............48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
61.10-5  Heading, (a), (b), (d) and (g) revised....................24782
61.15-1  (a) designation and (b) removed; eff. 10-18-95............48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
61.15-5  (b) revised...............................................24782
61.20-17  (e)(2) amended...........................................50462
61.20-21  Amended..................................................50463
61.25-1--61.25-5 (Subpart 61.25)  Removed; eff. 10-18-95...........48050

[[Page 453]]

    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
61.40-10  (b) amended..............................................50463
62.05-1  (a) amended...............................................50463
62.35-40  (b) amended..............................................50463
63.05-1  (a) amended...............................................50463
67  Technical correction...........................................37923
67.3  Amended...............................................31603, 40241
    Amended; eff. 10-18-95.........................................48050
    Regulation at 60 FR 48050 eff. date corrected to 10-1-95.......50120
67.13  (a) amended.................................................40241
67.15  (b) amended.................................................31604
67.63  (b)(1) amended..............................................31604
67.89  (a) amended.................................................31604
67.101  (a) amended................................................31604
67.111  (a) introductory text and (b) amended......................31604
67.113  (e) amended................................................31604
67.115  Removed....................................................31604
67.117  (a) introductory text and (c) amended......................31604
67.119  (d) and (e) revised........................................31604
67.130  Revised....................................................31604
67.133  (a) introductory text, (1), (b) and note amended...........31604
67.141  (a) introductory text amended..............................31604
67.145  (a) and (c) amended; (d) removed...........................31604
67.147  Removed....................................................31604
67.149  (b) amended................................................31604
67.151  (a) and (b) amended........................................31604
67.163  (b) amended................................................31604
67.165  (a) and (b) introductory text amended......................31604
67.167  (a) amended; (b)(3) removed; (b)(4) through (7) 
        redesignated as (b)(3) through (6).........................31604
67.169  (b) amended................................................31605
67.171  (b) and (d) amended........................................31605
67.173  Amended; note removed......................................31605
67.175  (b) introductory text amended..............................31605
67.177  (b) introductory text amended..............................31605
67.203  (a)(2) amended.............................................31605
67.211  (b) amended................................................31605
67.213  Revised....................................................31605
67.215  (a) and (b) amended........................................31605
67.217  (b) introductory text amended..............................31605
67.219  Added......................................................40241
67.301--67.303 (Subpart T)  Revised................................31605
67.313  (b)(2) amended.............................................31605
67.315  (b)(2) amended.............................................31605
67.319  Amended....................................................31605
67.321  Amended....................................................31605
67.500  (b) and (d) amended........................................31605
    (a) revi