[Title 46 CFR ]
[Code of Federal Regulations (annual edition) - October 1, 2020 Edition]
[From the U.S. Government Publishing Office]



[[Page i]]

          

          Title 46

Shipping


________________________

Parts 140 to 155

                         Revised as of October 1, 2020

          Containing a codification of documents of general 
          applicability and future effect

          As of October 1, 2020
                    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 OFFICIAL EDITION NOTICE

          Legal Status and Use of Seals and Logos
          
          
          The seal of the National Archives and Records Administration 
              (NARA) authenticates the Code of Federal Regulations (CFR) as 
              the official codification of Federal regulations established 
              under the Federal Register Act. Under the provisions of 44 
              U.S.C. 1507, the contents of the CFR, a special edition of the 
              Federal Register, shall be judicially noticed. The CFR is 
              prima facie evidence of the original documents published in 
              the Federal Register (44 U.S.C. 1510).

          It is prohibited to use NARA's official seal and the stylized Code 
              of Federal Regulations logo on any republication of this 
              material without the express, written permission of the 
              Archivist of the United States or the Archivist's designee. 
              Any person using NARA's official seals and logos in a manner 
              inconsistent with the provisions of 36 CFR part 1200 is 
              subject to the penalties specified in 18 U.S.C. 506, 701, and 
              1017.

          Use of ISBN Prefix

          This is the Official U.S. Government edition of this publication 
              and is herein identified to certify its authenticity. Use of 
              the 0-16 ISBN prefix is for U.S. Government Publishing Office 
              Official Editions only. The Superintendent of Documents of the 
              U.S. Government Publishing Office requests that any reprinted 
              edition clearly be labeled as a copy of the authentic work 
              with a new ISBN.

              
              
          U . S . G O V E R N M E N T P U B L I S H I N G O F F I C E

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

          U.S. Superintendent of Documents  Washington, DC 
              20402-0001

          http://bookstore.gpo.gov

          Phone: toll-free (866) 512-1800; DC area (202) 512-1800

[[Page iii]]




                            Table of Contents



                                                                    Page
  Explanation.................................................       v

  Title 46:
          Chapter I--Coast Guard, Department of Homeland 
          Security (Continued)                                       3
  Finding Aids:
      Table of CFR Titles and Chapters........................     353
      Alphabetical List of Agencies Appearing in the CFR......     373
      List of CFR Sections Affected...........................     383

[[Page iv]]





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

                     Cite this Code: CFR
                     To cite the regulations in 
                       this volume use title, 
                       part and section number. 
                       Thus, 46 CFR 140.100 
                       refers to title 46, part 
                       140, section 100.

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

[[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, 2020), 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.

PAST PROVISIONS OF THE CODE

    Provisions of the Code that are no longer in force and effect as of 
the revision date stated on the cover of each volume are not carried. 
Code users may find the text of provisions in effect on any given date 
in the past by using the appropriate List of CFR Sections Affected 
(LSA). For the convenience of the reader, a ``List of CFR Sections 
Affected'' is published at the end of each CFR volume. For changes to 
the Code prior to the LSA listings at the end of the volume, consult 
previous annual editions of the LSA. For changes to the Code prior to 
2001, consult the List of CFR Sections Affected compilations, published 
for 1949-1963, 1964-1972, 1973-1985, and 1986-2000.

``[RESERVED]'' TERMINOLOGY

    The term ``[Reserved]'' is used as a place holder within the Code of 
Federal Regulations. An agency may add regulatory information at a 
``[Reserved]'' location at any time. Occasionally ``[Reserved]'' is used 
editorially to indicate that a portion of the CFR was left vacant and 
not dropped in error.

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.
    What if the material incorporated by reference cannot be found? If 
you have any problem locating or obtaining a copy of material listed 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, 8601 Adelphi Road, College Park, MD 20740-6001, 
or call 202-741-6010.

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 Authorities 
and Rules. A list of CFR titles, chapters, subchapters, 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.

[[Page vii]]

    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.
    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 202-741-6000 
or write to the Director, Office of the Federal Register, National 
Archives and Records Administration, 8601 Adelphi Road, College Park, MD 
20740-6001 or e-mail [email protected].

SALES

    The Government Publishing Office (GPO) processes all sales and 
distribution of the CFR. For payment by credit card, call toll-free, 
866-512-1800, or DC area, 202-512-1800, M-F 8 a.m. to 4 p.m. e.s.t. or 
fax your order to 202-512-2104, 24 hours a day. For payment by check, 
write to: US Government Publishing Office - New Orders, P.O. Box 979050, 
St. Louis, MO 63197-9000.

ELECTRONIC SERVICES

    The full text of the Code of Federal Regulations, the LSA (List of 
CFR Sections Affected), The United States Government Manual, the Federal 
Register, Public Laws, Public Papers of the Presidents of the United 
States, Compilation of Presidential Documents and the Privacy Act 
Compilation are available in electronic format via www.govinfo.gov. For 
more information, contact the GPO Customer Contact Center, U.S. 
Government Publishing Office. Phone 202-512-1800, or 866-512-1800 (toll-
free). E-mail, [email protected].
    The Office of the Federal Register also offers a free service on the 
National Archives and Records Administration's (NARA) website for public 
law numbers, Federal Register finding aids, and related information. 
Connect to NARA's website at www.archives.gov/federal-register.
    The e-CFR is a regularly updated, unofficial editorial compilation 
of CFR material and Federal Register amendments, produced by the Office 
of the Federal Register and the Government Publishing Office. It is 
available at www.ecfr.gov.

    Oliver A. Potts,
    Director,
    Office of the Federal Register
    October 1, 2020







[[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, 
DHS. The eighth volume, containing parts 200--499, includes chapter II--
Maritime Administration, DOT and chapter III--Coast Guard (Great Lakes 
Pilotage), DHS. 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, 2020.

    For this volume, Stephen J. Frattini was Chief Editor. The Code of 
Federal Regulations publication program is under the direction of John 
Hyrum Martinez.

[[Page 1]]



                           TITLE 46--SHIPPING




                  (This book contains parts 140 to 155)

  --------------------------------------------------------------------
                                                                    Part

chapter i--Coast Guard, Department of Homeland Security 
  (Continued)...............................................         140

[[Page 3]]



   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)




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

                      SUBCHAPTER M--TOWING VESSELS
Part                                                                Page
140             Operations..................................           5
141             Lifesaving..................................          17
142             Fire protection.............................          23
143             Machinery and electrical systems and 
                    equipment...............................          30
144             Construction and arrangement................          43
                     SUBCHAPTER N--DANGEROUS CARGOES
145-146

[Reserved]

147             Hazardous ships' stores.....................          51
147A            Interim regulations for shipboard fumigation          58
148             Carriage of bulk solid materials that 
                    require special handling................          62
149

[Reserved]

              SUBCHAPTER O--CERTAIN BULK DANGEROUS CARGOES
150             Compatibility of cargoes....................          92
151             Barges carrying bulk liquid hazardous 
                    material cargoes........................         147
152

[Reserved]

153             Ships carrying bulk liquid, liquefied gas, 
                    or compressed gas hazardous materials...         214
154             Safety standards for self-propelled vessels 
                    carrying bulk liquefied gases...........         288
155

[Reserved]

               SUBCHAPTER P--MANNING OF VESSELS [RESERVED]

[[Page 5]]



                       SUBCHAPTER M_TOWING VESSELS





PART 140_OPERATIONS--Table of Contents



                            Subpart A_General

Sec.
140.100 Purpose.
140.105 Applicability and delayed implementation for existing vessels.

                  Subpart B_General Operational Safety

140.205 General vessel operation.
140.210 Responsibilities of the master and crew.

Subpart C [Reserved]

                          Subpart D_Crew Safety

140.400 Personnel records.
140.405 Emergency duties and duty stations.
140.410 Safety orientation.
140.415 Orientation for individuals that are not crewmembers.
140.420 Emergency drills and instruction.
140.425 Fall overboard prevention.
140.430 Wearing of work vests.
140.435 First aid equipment.

                       Subpart E_Safety and Health

140.500 General.
140.505 General health and safety requirements.
140.510 Identification and mitigation of health and safety hazards.
140.515 Training requirements.

                   Subpart F_Vessel Operational Safety

140.600 Applicability.
140.605 Vessel stability.
140.610 Hatches and other openings.
140.615 Examinations and tests.
140.620 Navigational safety equipment.
140.625 Navigation underway.
140.630 Lookout.
140.635 Navigation assessment.
140.640 Pilothouse resource management.
140.645 Navigation safety training.
140.650 Operational readiness of lifesaving and fire suppression and 
          detection equipment.
140.655 Prevention of oil and garbage pollution.
140.660 Vessel security.
140.665 Inspection and testing required when making alterations, 
          repairs, or other such operations involving riveting, welding, 
          burning, or like fire-producing actions.
140.670 Use of auto pilot.

            Subpart G_Navigation and Communication Equipment

140.700 Applicability.
140.705 Charts and nautical publications.
140.710 Marine radar.
140.715 Communications equipment.
140.720 Navigation lights, shapes, and sound signals.
140.725 Additional navigation equipment.

                         Subpart H_Towing Safety

140.800 Applicability.
140.801 Towing gear.
140.805 Towing safety.
140.820 Recordkeeping for towing gear.

                        Subpart I_Vessel Records

140.900 Marine casualty reporting.
140.905 Official logbooks.
140.910 Towing vessel record or record specified by TSMS.
140.915 Items to be recorded.

                           Subpart J_Penalties

140.1000 Statutory penalties.
140.1005 Suspension and revocation.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 
CFR 1.05; DHS Delegation 0170.1.

    Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless 
otherwise noted.



                            Subpart A_General



Sec.  140.100  Purpose.

    This part contains the health, safety, and operational requirements 
for towing vessels and the crewmembers serving onboard them.



Sec.  140.105  Applicability and delayed implementation for existing
vessels.

    This part applies to all towing vessels subject to this subchapter.
    (a) With the exception Sec.  140.500, which has a later 
implementation date, an existing towing vessel must comply with the 
requirements in this part no later than either July 20, 2018 or the date 
the vessel obtains a Certificate of Inspection (COI), whichever date is 
earlier.
    (b) The delayed implementation provisions in paragraph (a) of this 
section do not apply to a new towing vessel.

[[Page 6]]



                  Subpart B_General Operational Safety



Sec.  140.205  General vessel operation.

    (a) A vessel must be operated in accordance with applicable laws and 
regulations and in such a manner as to afford protection against hazards 
to life, property, and the environment.
    (b) Towing vessels with a Towing Safety Management System (TSMS) 
must be operated in accordance with the TSMS applicable to the vessel.
    (c) Vessels must be manned in accordance with the COI. Manning 
requirements are contained in part 15 of this chapter.
    (d) Each crewmember that is required to hold a Merchant Mariner 
Credential (MMC) must have the credential on board and available for 
examination at all times when the vessel is operating.
    (e) All individuals who are not required to hold an MMC permitted 
onboard the vessel must have and present on request a valid personal 
identification that meets the requirements set forth in 33 CFR 101.515.



Sec.  140.210  Responsibilities of the master and crew.

    (a) The safety of the towing vessel is the responsibility of the 
master and includes:
    (1) Adherence to the provisions of the COI;
    (2) Compliance with the applicable provisions of this subchapter;
    (3) Compliance with the TSMS, if one is applicable to the vessel; 
and
    (4) Supervision of all persons onboard in carrying out their 
assigned duties.
    (b) If the master or officer in charge of a navigational watch 
believes it is unsafe for the vessel to proceed, that an operation 
endangers the vessel or crew, or that an unsafe condition exists, he or 
she must ensure that adequate corrective action is taken and must not 
proceed until it is safe to do so.
    (c) Nothing in this subpart may be construed in a manner which 
limits the master or officer in charge of a navigational watch, at his 
or her own responsibility, from diverting from the route prescribed in 
the COI or taking such steps as deemed necessary and prudent to assist 
vessels in distress or for other emergency conditions.
    (d) It is the responsibility of the crew to:
    (1) Adhere to the provisions of the COI;
    (2) Comply with the applicable provisions of this subchapter;
    (3) Comply with the TSMS, if one is applicable to the vessel;
    (4) Ensure that the master or officer in charge of a navigational 
watch is made aware of all known aspects of the condition of the vessel, 
including:
    (i) Those vessels being pushed, pulled, or hauled alongside; and
    (ii) Equipment and other accessories used for pushing, pulling, or 
hauling alongside other vessels.
    (5) Minimize any distraction from the operation of the vessel or 
performance of duty; and
    (6) Report unsafe conditions to the master or officer in charge of a 
navigational watch and take effective action to prevent accidents.

Subpart C [Reserved]



                          Subpart D_Crew Safety



Sec.  140.400  Personnel records.

    (a) The master of each towing vessel must keep an accurate list of 
crewmembers and their assigned positions and responsibilities aboard the 
vessel.
    (b) The master must keep an accurate list of individuals to be 
carried as persons in addition to the crew and any passengers.
    (c) The date and time that a navigation watchstander, including 
master, officer in charge of a navigational watch, and lookout assumes a 
watch and is relieved of a watch must be recorded in the towing vessel 
record (TVR), official logbook, or in accordance with the TSMS 
applicable to the vessel. If an engineering watch is maintained, 
comparable records documenting the engineering watch are required.



Sec.  140.405  Emergency duties and duty stations.

    (a) Crewmembers must meet the requirements in Sec. Sec.  15.405 and 
15.1105 of this chapter, as appropriate.

[[Page 7]]

    (b) Any towing vessel with alternating watches (shift work) or 
overnight accommodations must identify the duties and duty stations of 
each person onboard during an emergency, including:
    (1) Responding to fires and flooding;
    (2) Responding to emergencies that necessitate abandoning the 
vessel;
    (3) Launching survival craft;
    (4) Taking action during heavy weather;
    (5) Taking action in the event of a person overboard;
    (6) Taking action relative to the tow;
    (7) Taking action in the event of failure of propulsion, steering, 
or control system;
    (8) Managing individuals onboard who are not crewmembers;
    (9) Managing any other event or condition which poses a threat to 
life, property, or the environment; and
    (10) Responding to other special duties essential to addressing 
emergencies as determined by the TSMS applicable to the vessel, if a 
TSMS is used.
    (c) The emergency duties and duty stations required by this section 
must be posted at each operating station and in a conspicuous location 
in a space commonly visited by crewmembers. If posting is impractical, 
such as in an open boat, they may be kept onboard in a location readily 
available to the crew.



Sec.  140.410  Safety orientation.

    (a) Personnel must meet the requirements in Sec. Sec.  15.405 and 
15.1105 of this chapter, as appropriate.
    (b) Prior to getting underway for the first time on a particular 
towing vessel, each crewmember must receive a safety orientation on:
    (1) His or her duties in an emergency;
    (2) The location, operation, and use of lifesaving equipment;
    (3) Prevention of falls overboard;
    (4) Personal safety measures;
    (5) The location, operation, and use of Personal Protective 
Equipment;
    (6) Emergency egress procedures;
    (7) The use and operation of watertight and weathertight closures;
    (8) Responsibilities to provide assistance to individuals that are 
not crewmembers;
    (9) How to respond to emergencies relative to the tow; and
    (10) Awareness of, and expected response to, any other hazards 
inherent to the operation of the towing vessel which may pose a threat 
to life, property, or the environment.
    (c) The safety orientation provided to crewmembers who received a 
safety orientation on another vessel may be modified to cover only those 
areas unique to the other vessel on which service will occur.
    (d) Safety orientations and other crew training must be documented 
in the TVR, official logbook, or in accordance with the TSMS applicable 
to the vessel. The entry must include:
    (1) The date of the safety orientation or training;
    (2) A general description of the safety orientation or training 
topics;
    (3) The name(s) and signature(s) of individual(s) providing the 
orientation or training; and
    (4) The name(s) of the individual(s) receiving the safety 
orientation or training.



Sec.  140.415  Orientation for individuals that are not crewmembers.

    Individuals, who are not crewmembers, on board a towing vessel must 
receive a safety orientation prior to getting underway or as soon as 
practicable thereafter, to include:
    (a) The location, operation, and use of lifesaving equipment;
    (b) Emergency procedures;
    (c) Methods to notify crewmembers in the event of an emergency; and
    (d) Prevention of falls overboard.



Sec.  140.420  Emergency drills and instruction.

    (a) Master's responsibilities. The master of a towing vessel must 
ensure that drills are conducted and instructions are given to ensure 
that all crewmembers are capable of performing the duties expected of 
them during emergencies. This includes abandoning the vessel, recovering 
persons from the water, responding to onboard fires and flooding, or 
responding to other threats to life, property, or the environment.
    (b) Nature of drills. Each drill must, as far as practicable, be 
conducted as if there was an actual emergency.

[[Page 8]]

    (c) Annual instruction for each crew member. Unless otherwise 
stated, each crewmember must receive the instruction required by this 
section annually.
    (d) Instructions and drills required. The following instruction and 
drills are required:
    (1) Response to fires, as required by Sec.  142.245 of this 
subchapter;
    (2) Launching of a skiff, if listed as an item of emergency 
equipment to abandon ship or recover a person-overboard;
    (3) Instruction on the use of davit-launched liferafts, if 
installed.
    (4) If a rescue boat is installed, instruction on how it must be 
launched, with its assigned crew aboard, and maneuvered in the water as 
if during an actual man-overboard situation.
    (5) Credentialed mariners holding an officer endorsement do not 
require instruction in accordance with paragraphs (d)(1), (3), and (4) 
of this section.
    (e) Alternative forms of instruction. (1) Instruction as required by 
this section may be conducted via an electronic format followed by a 
discussion and demonstration by a competent individual. This instruction 
may occur either on board or off the vessel but must include the 
equipment that is the subject of the instruction.
    (2) Instruction as required by this section may be performed in 
accordance with the TSMS applicable to the vessel, provided that it 
meets the minimum requirements of this section.
    (f) Location of drills, full crew participation, and use of 
equipment. As far as practicable, drills must take place on board the 
vessel. They must include:
    (1) Participation by all crewmembers; and
    (2) Actual use of, or realistic simulation of the use of, emergency 
equipment.
    (g) Recordkeeping. Records of drills and instruction must be 
maintained in the TVR, official logbook, or in accordance with the TSMS 
applicable to the vessel. The record must include:
    (1) The date of the drill and instruction;
    (2) A description of the drill scenario and instruction topics;
    (3) The personnel involved.



Sec.  140.425  Fall overboard prevention.

    (a) The owner or managing operator of a towing vessel must establish 
procedures to address fall overboard prevention and recovery of persons 
in the water, including, but not limited to:
    (1) Personal protective equipment;
    (2) Safely working on the tow;
    (3) Safety while line handling;
    (4) Safely moving between the vessel and a tow, pier, structure, or 
other vessel; and
    (5) Use of retrieval equipment.
    (b) The owner, managing operator, or master must ensure that all 
persons on board comply with the policies and procedures in this 
section.



Sec.  140.430  Wearing of work vests.

    (a) Personnel dispatched from the vessel or that are working in an 
area on the exterior of the vessel without rails and guards must wear a 
lifejacket meeting requirements in 46 CFR 141.340, an immersion suit 
meeting requirements in 46 CFR 141.350, or a work vest approved by the 
Commandant under 46 CFR subpart 160.053. When worn at night, the work 
vest must be equipped with a light that meets the requirements of 46 CFR 
141.340(g)(1). Work vests may not be substituted for the lifejackets 
required by 46 CFR part 141.
    (b) Each storage container containing a work vest must be marked 
``WORK VEST''.



Sec.  140.435  First aid equipment.

    Each towing vessel must be equipped with an industrial type first 
aid cabinet or kit, appropriate to the size of the crew and operating 
conditions. Each towing vessel operating on oceans, coastwise, or Great 
Lakes routes must have a means to take blood pressure readings, splint 
broken bones, and apply large bandages for serious wounds.



                       Subpart E_Safety and Health



Sec.  140.500  General.

    (a) No later than July 22, 2019, the owner or managing operator must 
implement a health and safety plan. The health and safety plan must 
document

[[Page 9]]

compliance with this part and include recordkeeping procedures.
    (b) The owner, managing operator, or master must ensure that all 
persons on board a towing vessel comply with the health and safety plan.



Sec.  140.505  General health and safety requirements.

    (a) The owner or managing operator must implement procedures for 
reporting unsafe conditions and must have records of the activities 
conducted under this section. The owner or managing operator must 
maintain records of health and safety incidents that occur on board the 
vessel, including any medical records associated with the incidents. 
Upon request, the owner or managing operator must provide crewmembers 
with incident reports and the crewmember's own associated medical 
records.
    (b) All vessel equipment must be used in accordance with the 
manufacturer's recommended practice and in a manner that minimizes risk 
of injury or death. This includes machinery, deck machinery, towing 
gear, ladders, embarkation devices, cranes, portable tools, and safety 
equipment.
    (c) All machinery and equipment that is not in proper working order 
(including missing or malfunctioning guards or safety devices) must be 
removed; made safe through marking, tagging, or covering; or otherwise 
made unusable.
    (d) Personal Protective Equipment (PPE). (1) Appropriate Personal 
Protective Equipment (PPE) must be made available and on hand for all 
personnel engaged in an activity that requires the use of PPE.
    (2) PPE must be suitable for the vessel's intended service; meet the 
standards of 29 CFR part 1910, subpart I; and be used, cleaned, 
maintained, and repaired in accordance with manufacturer's requirements.
    (3) All individuals must wear PPE appropriate to the activity being 
performed;
    (4) All personnel engaged in an activity must be trained in the 
proper use, limitations, and care of the PPE specified by this subpart;
    (e) The vessel, including crew's quarters and the galley, must be 
kept in a sanitary condition.



Sec.  140.510  Identification and mitigation of health and safety
hazards.

    (a) The owner or managing operator must implement procedures to 
identify and mitigate health and safety hazards, including but not 
limited to:
    (1) Tools and equipment, including deck machinery, rigging, welding 
and cutting, hand tools, ladders, and abrasive wheel machinery found on 
board the vessel;
    (2) Slips, trips, and falls;
    (3) Working aloft;
    (4) Hazardous materials;
    (5) Confined space entry;
    (6) Blood-borne pathogens and other biological hazards;
    (7) Electrical;
    (8) Noise;
    (9) Falls overboard;
    (10) Vessel embarkation and disembarkation (including pilot 
transfers);
    (11) Towing gear, including winches, capstans, wires, hawsers and 
other related equipment;
    (12) Personal hygiene;
    (13) Sanitation and safe food handling; and
    (14) Potable water supply.
    (b) As far as practicable, the owner or managing operator must 
implement other types of safety control measures before relying on 
Personal Protective Equipment. These controls may include 
administrative, engineering, source modification, substitution, process 
change or controls, isolation, ventilation, or other controls.



Sec.  140.515  Training requirements.

    (a) All crewmembers must be provided with health and safety 
information and training that includes:
    (1) Content and procedures of the owner or managing operator's 
health and safety plan;
    (2) Procedures for reporting unsafe conditions;
    (3) Proper selection and use of PPE appropriate to the vessel 
operation;
    (4) Safe use of equipment including deck machinery, rigging, welding 
and cutting, hand tools, ladders, and abrasive wheel machinery found 
onboard the vessel;

[[Page 10]]

    (5) Hazard communication and cargo knowledge;
    (6) Safe use and storage of hazardous materials and chemicals;
    (7) Confined space entry;
    (8) Respiratory protection; and
    (9) Lockout/Tagout procedures.
    (b) Individuals, other than crewmembers, must be provided with 
sufficient information or training on hazards relevant to their 
potential exposure on or around the vessel.
    (c) Crewmember training required by this section must be conducted 
as soon as practicable, but not later than 5 days after employment.
    (d) Refresher training must be repeated annually and may be 
conducted over time in modules covering specific topics. Refresher 
training may be less comprehensive, provided that the information 
presented is sufficient to provide employees with continued 
understanding of workplace hazards. The refresher training of persons 
subject to this subpart must include the information and training 
prescribed in this section.
    (e) The owner, managing operator, or master must determine the 
appropriate training and information to provide to each individual 
permitted on the vessel who is not a crewmember, relative to the 
expected risk exposure of the individual.
    (f) All training required in this section must be documented in 
owner or managing operator's records.



                   Subpart F_Vessel Operational Safety



Sec.  140.600  Applicability.

    This subpart applies to all towing vessels unless otherwise 
specified. Certain vessels remain subject to the navigation safety 
regulations in 33 CFR part 164.



Sec.  140.605  Vessel stability.

    (a) Prior to getting underway, and at all other times necessary to 
ensure the safety of the vessel, the master or officer in charge of a 
navigational watch must determine whether the vessel complies with all 
stability requirements in the vessel's trim and stability book, 
stability letter, COI, and Load Line Certificate, as applicable.
    (b) A towing vessel must be maintained and operated so the 
watertight integrity and stability of the vessel are not compromised.



Sec.  140.610  Hatches and other openings.

    (a) All towing vessels must be operated in a manner that minimizes 
the risk of down-flooding and progressive flooding.
    (b) The master must ensure that all hatches, doors, and other 
openings designed to be watertight or weather-tight function properly.
    (c) The master or officer in charge of a navigational watch must 
ensure all hatches and openings of the hull and deck are kept tightly 
closed except:
    (1) When access is needed through the opening for transit;
    (2) When operating on rivers with a tow, if the master determines 
the safety of the vessel is not compromised; or
    (3) When operating on lakes, bays, and sounds, without a tow during 
calm weather, and only if the master determines that the safety of the 
vessel is not compromised.
    (d) Where installed, all watertight doors in watertight bulkheads 
must be closed during the operation of the vessel, unless they are being 
used for transit between compartments; and
    (e) When downstreaming, all exterior openings at the main deck level 
must be closed.
    (f) Decks and bulkheads designed to be watertight or weathertight 
must be maintained in that condition.



Sec.  140.615  Examinations and tests.

    (a) This section applies to a towing vessel not subject to 33 CFR 
164.80.
    (b) Prior to getting underway, the master or officer in charge of a 
navigational watch of the vessel must examine and test the steering 
gear, signaling whistle, propulsion control, towing gear, navigation 
lights, navigation equipment, and communication systems of the vessel. 
This examination and testing does not need to be conducted more than 
once in any 24-hour period.
    (c) The results of the examination and testing must be recorded in 
the TVR, official logbook, or in accordance with the TSMS applicable to 
the vessel.

[[Page 11]]



Sec.  140.620  Navigational safety equipment.

    (a) This section applies to a towing vessel not subject to the 
requirements of 33 CFR 164.82.
    (b) The owner, managing operator, or master of each towing vessel 
must maintain the required navigational-safety equipment in a fully-
functioning, operational condition.
    (c) Navigational safety equipment such as radar, gyrocompass, echo 
depth-sounding or other sounding device, automatic dependent 
surveillance equipment, or navigational lighting that fails during a 
voyage must be repaired at the earliest practicable time. The owner, 
managing operator, or master must consider the state of the equipment 
(along with such factors as weather, visibility, traffic, and the 
dictates of good seamanship) when deciding whether it is safe for the 
vessel to proceed.
    (d) The failure and subsequent repair or replacement of navigational 
safety equipment must be recorded. The record must be made in the TVR, 
official logbook, or in accordance with the TSMS applicable to the 
vessel.



Sec.  140.625  Navigation underway.

    (a) At all times, the movement of a towing vessel and its tow must 
be under the direction and control of a master or mate (pilot) properly 
licensed under subchapter B of this chapter.
    (b) The master or officer in charge of a navigational watch must 
operate the vessel in accordance with the conditions and restrictions 
stated on the COI and the TSMS applicable to the vessel.
    Note to Sec.  140.625. Certain towing vessels subject to Sec.  
140.625 are also subject to the requirements of 33 CFR 164.78.



Sec.  140.630  Lookout.

    (a) Throughout the trip or voyage the master and officer in charge 
of the navigational watch must assess the requirement for a lookout, 
consistent with 33 CFR 83.05. A lookout in addition to the master or 
mate (pilot) should be added when necessary to:
    (1) Maintain a state of vigilance with regard to any significant 
change in the operational environment;
    (2) Assess the situation and the risk of collision/allision;
    (3) Anticipate stranding and other dangers to navigation; and
    (4) Detect any other potential hazards to safe navigation.
    (b) In determining the requirement for a lookout, the officer in 
charge of the navigational watch must take full account of relevant 
factors including, but not limited to: state of weather, visibility, 
traffic density, proximity of dangers to navigation, and the attention 
necessary when navigating in areas of increased vessel traffic.



Sec.  140.635  Navigation assessment.

    (a) The officer in charge of a navigational watch must conduct a 
navigation assessment for the intended route and operations prior to 
getting underway. The navigation assessment must incorporate the 
requirements of pilothouse resource management of Sec.  140.640, assess 
operational risks, and anticipate and manage workload demands. At a 
minimum, this assessment must consider:
    (1) The velocity and direction of currents in the area being 
transited;
    (2) Water depth, river stage, and tidal state along the route and at 
mooring location;
    (3) Prevailing visibility and weather conditions and changes 
anticipated along the intended route;
    (4) Density (actual and anticipated) of marine traffic;
    (5) The operational status of pilothouse instrumentation and 
controls, to include alarms, communication systems, variation and 
deviation errors of the compass, and any known nonconformities or 
deficiencies;
    (6) Air draft relative to bridges and overhead obstructions taking 
tide and river stage into consideration;
    (7) Horizontal clearance, to include bridge transits;
    (8) Lock transits;
    (9) Navigation hazards such as logs, wrecks or other obstructions in 
the water;
    (10) Any broadcast notice to mariners, safety or security zones or 
special navigation areas;

[[Page 12]]

    (11) Configuration of the vessel and tow, including handling 
characteristics, field of vision from the pilothouse, and activities 
taking place onboard;
    (12) The knowledge, qualifications, and limitations of crewmembers 
who are assigned as members on watch and the experience and familiarity 
of crewmembers with the towing vessels particulars and equipment; and
    (13) Any special conditions not covered above that impact the safety 
of navigation.
    (b) The officer in charge of a navigational watch must keep the 
navigation assessment up-to-date to reflect changes in conditions and 
circumstances. This includes updates during the voyage or trip as 
necessary. At each change of the navigational watch, the oncoming 
officer in charge of the navigational watch must review the current 
navigation assessment for necessary changes.
    (c) The officer in charge of a navigational watch must ensure that 
the navigation assessment and any updates are communicated to other 
members of the navigational watch.
    (d) A navigation assessment entry must be recorded in the TVR, 
official log, or in accordance with the TSMS applicable to the vessel. 
The entry must include the date and time of the assessment, the name of 
the individual making the assessment, and the starting and ending points 
of the voyage or trip that the assessment covers.
    Note to Sec.  140.635. Certain towing vessels subject to Sec.  
140.635 are also subject to the voyage planning requirements of 33 CFR 
164.80.



Sec.  140.640  Pilothouse resource management.

    (a) The officer in charge of a navigational watch must:
    (1) Ensure that other members of the navigational watch have a 
working knowledge of the navigation assessment required by Sec.  
140.635, and understand the chain of command, the decision-making 
process, and the fact that information sharing is critical to the safety 
of the vessel.
    (2) Ensure that the navigation assessment required by Sec.  140.635 
is complete, updated, communicated and available throughout the trip.
    (3) Ensure that watch change procedures incorporate all items listed 
in paragraph (a)(1) of this section.
    (4) Take actions (to include delaying watch change or pausing the 
voyage) if there is reasonable cause to believe that an oncoming 
watchstander is not immediately capable of carrying out his or her 
duties effectively.
    (5) Maintain situational awareness and minimize distractions.
    (b) Prior to assuming duties as officer in charge of a navigational 
watch, a person must:
    (1) Complete the navigation assessment required by Sec.  140.635;
    (2) Verify the operational condition of the towing vessel; and
    (3) Verify that there are adequate personnel available to assume the 
watch.
    (c) If at any time the officer in charge of a navigational watch is 
to be relieved when a maneuver or other action to avoid any hazard is 
taking place, the relief of that officer in charge of a navigational 
watch must be deferred until such action has been completed.



Sec.  140.645  Navigation safety training.

    (a) Prior to assuming duties related to the safe operation of a 
towing vessel, each crewmember must receive training to ensure that they 
are familiar with:
    (1) Watchstanding terms and definitions;
    (2) Duties of a lookout;
    (3) Communication with other watchstanders;
    (4) Change of watch procedures;
    (5) Procedures for reporting other vessels or objects; and
    (6) Watchstanding safety.
    (b) Crewmember training must be recorded in the TVR, official 
logbook, or in accordance with the TSMS applicable to the vessel.
    (c) Credentialed mariners holding Able Seaman or officer 
endorsements will be deemed to have met the training requirements in 
this section.



Sec.  140.650  Operational readiness of lifesaving and fire 
suppression and detection equipment.

    The owner, managing operator, or master of a towing vessel must 
ensure

[[Page 13]]

that the vessel's lifesaving and fire suppression and detection 
equipment complies with the applicable requirements of parts 141 and 142 
of this subchapter and is in good working order.



Sec.  140.655  Prevention of oil and garbage pollution.

    (a) Each towing vessel must be operated in compliance with:
    (1) Applicable sections of the Federal Water Pollution Control Act, 
including section 311 of the Federal Water Pollution Control Act, as 
amended (33 U.S.C. 1321);
    (2) Applicable sections of the Act to Prevent Pollution from Ships 
(33 U.S.C. 1901 et seq.); and
    (3) Parts 151, 155, and 156, of 33 CFR, as applicable.
    (b) Each towing vessel must be capable of preventing all oil spills 
from reaching the water during transfers by:
    (1) Pre-closing the scuppers/freeing ports, if the towing vessel is 
so equipped;
    (2) Using fixed or portable containment of sufficient capacity to 
contain the most likely spill, if 33 CFR 155.320 does not apply; or
    (3) Pre-deploying sorbent material on the deck around vents and 
fills.
    (c) No person may intentionally drain oil or hazardous material into 
the bilge of a towing vessel from any source. For purposes of this 
section, ``oil'' has the same meaning as ``oil'' defined in 33 U.S.C. 
1321.



Sec.  140.660  Vessel security.

    Each towing vessel must be operated in compliance with:
    (a) The Maritime Transportation Security Act of 2002 (46 U.S.C. 
Chapter 701); and
    (b) 33 CFR parts 101 and 104, as applicable.



Sec.  140.665  Inspection and testing required when making 
alterations, repairs, or other such operations involving riveting,
welding, burning, or like fire-producing actions.

    (a) The inspections and issuance of certificates required by this 
section must be conducted in accordance with the provisions of NFPA 306 
(incorporated by reference, see Sec.  136.112 of this subchapter) before 
alterations, repairs, or other operations involving riveting, welding, 
burning, or other fire producing actions may be made aboard a vessel.
    (b) Until an inspection has been made to determine that such 
operation can be undertaken with safety, no alterations, repairs, or 
other such operations involving riveting, welding, burning, or like 
fire-producing actions must be made:
    (1) Within or on the boundaries of cargo tanks which have been used 
to carry combustible liquid or chemicals in bulk;
    (2) Within or on the boundaries of fuel tanks; or,
    (3) To pipe lines, heating coils, pumps, fittings, or other 
appurtenances connected to such cargo or fuel tanks.
    (c) Such inspections must be made and evidenced as follows:
    (1) In ports or places in the United States or its territories and 
possessions the inspection must be made by a marine chemist certificated 
by the National Fire Protection Association. However, if the services of 
such certified marine chemist are not reasonably available, the Officer 
in Charge, Marine Inspection (OCMI), upon the recommendation of the 
vessel owner and his or her contractor or their representative, must 
select a person who, in the case of an individual vessel, must be 
authorized to make such inspection. If the inspection indicated that 
such operations can be undertaken with safety, a certificate setting 
forth the fact in writing and qualified as may be required, must be 
issued by the certified marine chemist or the authorized person before 
the work is started. Such qualifications must include any requirements 
as may be deemed necessary to maintain the safe conditions in the spaces 
certified throughout the operation and must include such additional 
tests and certifications as considered required. Such qualifications and 
requirements must include precautions necessary to eliminate or minimize 
hazards that may be present from protective coatings or residues from 
cargoes.
    (2) When not in such a port or place, and a marine chemist or such 
person authorized by the OCMI, is not reasonably available, the 
inspection must be made by the master or person in charge

[[Page 14]]

and a proper entry must be made in the vessel's logbook.
    (d) The master or person in charge must secure copies of 
certificates issued by the certified marine chemist or such person 
authorized by the OCMI. The master or person in charge must maintain a 
safe condition on the vessel by full observance of all qualifications 
and requirements listed by the marine chemist or person authorized by 
the OCMI in the certificate.



Sec.  140.670  Use of auto pilot.

    Except for towing vessels in compliance with requirements in 33 CFR 
164.13(d), when an automatic pilot is used in areas of high traffic 
density, conditions of restricted visibility, or any other hazardous 
navigational situations, the master must ensure that:
    (a) It is possible to immediately establish manual control of the 
ship's steering;
    (b) A competent person is ready at all times to take over steering 
control; and
    (c) The changeover from automatic to manual steering and vice versa 
is made by, or under, the supervision of the officer in charge of the 
navigational watch.



            Subpart G_Navigation and Communication Equipment



Sec.  140.700  Applicability.

    This subpart applies to all towing vessels unless otherwise 
specified. Certain towing vessels are also subject to the navigation 
safety regulations in 33 CFR part 164.



Sec.  140.705  Charts and nautical publications.

    (a) This section applies to a towing vessel not subject to the 
requirements of 33 CFR 164.72.
    (b) A towing vessel must carry adequate and up-to-date charts, maps, 
and nautical publications for the intended voyage, including:
    (1) Charts, including electronic charts acceptable to the Coast 
Guard, of appropriate scale to make safe navigation possible. Towing 
vessels operating on the Western Rivers must have maps of appropriate 
scale issued by the Army Corps of Engineers or a river authority;
    (2) ``U.S. Coast Pilot'' or similar publication;
    (3) Coast Guard light list; and
    (4) Towing vessels that operate the Western Rivers must have river 
stage(s) or Water Surface Elevations as appropriate to the trip or 
route, as published by the U.S. Army Corps of Engineers or a river 
authority, must be available to the person in charge of the navigation 
watch.
    (c) Extracts or copies from the publications listed in paragraph (b) 
of this section may be carried, so long as they are applicable to the 
route.



Sec.  140.710  Marine radar.

    Requirements for marine radar are set forth in 33 CFR 164.72.



Sec.  140.715  Communications equipment.

    (a) Towing vessels must meet the communications requirements of 33 
CFR part 26 and 33 CFR 164.72, as applicable.
    (b) Towing vessels not subject to the provisions of 33 CFR part 26 
or 33 CFR 164.72 must have a Very High Frequency-Frequency Modulated 
(VHF-FM) radio installed and capable of monitoring VHF-FM Channels 13 
and 16, except when transmitting or receiving traffic on other VHF-FM 
channels, when participating in a Vessel Traffic Service (VTS), or when 
monitoring a channel of a VTS. The VHF-FM radio must be installed at 
each operating station and connected to a functioning battery backup.
    (c) All towing vessels must have at least one properly operating 
handheld VHF-FM radio in addition to the radios otherwise required.



Sec.  140.720  Navigation lights, shapes, and sound signals.

    Each towing vessel must be equipped with navigation lights, shapes, 
and sound signals in accordance with the International Regulations for 
Prevention of Collisions at Sea (COLREGS) or 33 CFR part 84 as 
appropriate to its area of operation.

[[Page 15]]



Sec.  140.725  Additional navigation equipment.

    Towing vessels must be equipped with the following equipment, as 
applicable to the area of operation:
    (a) Fathometer (except Western Rivers).
    (b) Search light, controllable from the vessel's operating station 
and capable of illuminating objects at a distance of at least two times 
the length of the tow.
    (c) Electronic position-fixing device, satisfactory for the area in 
which the vessel operates, if the towing vessel engages in towing 
seaward of the navigable waters of the U.S. or more than 3 nautical 
miles from shore on the Great Lakes.
    (d) Illuminated magnetic compass or an illuminated swing-meter 
(Western Rivers vessels only). The compass or swing-meter must be 
readable from each operating station.
    Note to Sec.  140.725. Certain towing vessels subject to Sec.  
140.725 are also subject to the requirements of 33 CFR 164.72 and 
Automatic Identification System requirements of 33 CFR 164.46.



                         Subpart H_Towing Safety



Sec.  140.800  Applicability.

    This subpart applies to all towing vessels unless otherwise 
specified. Certain vessels are also subject to the navigation safety 
regulations in 33 CFR parts 163 and 164.



Sec.  140.801  Towing gear.

    The owner, managing operator, master or officer in charge of a 
navigational watch of a towing vessel must ensure the following:
    (a) The strength of each component used for securing the towing 
vessel to the tow and for making up the tow is adequate for its intended 
service.
    (b) The size, material, and condition of towlines, lines, wires, 
push gear, cables, and other rigging used for making up a tow or 
securing the towing vessel to a tow must be appropriate for:
    (1) The horsepower or bollard pull of the vessel;
    (2) The static loads and dynamic loads expected during the intended 
service;
    (3) The environmental conditions expected during the intended 
service; and
    (4) The likelihood of mechanical damage.
    (c) Emergency procedures related to the tow have been developed and 
appropriate training provided to the crew for carrying out their 
emergency duties.



Sec.  140.805  Towing safety.

    Prior to getting underway, and giving due consideration to the 
prevailing and expected conditions of the trip or voyage, the officer in 
charge of the navigational watch for a towing vessel must ensure that:
    (a) The barges, vessels, or objects making up the tow are properly 
configured and secured;
    (b) Equipment, cargo, and industrial components on board the tow are 
properly secured and made ready for transit;
    (c) The towing vessel is safely and securely made up to the tow; and
    (d) The towing vessel has appropriate horsepower or bollard pull and 
is capable of safely maneuvering the tow.



Sec.  140.820  Recordkeeping for towing gear.

    (a) The results of the inspections required by 33 CFR 164.76 must be 
documented in the TVR, official logbook, or in accordance with the TSMS 
applicable to the vessel.
    (b) A record of the type, size, and service of each towline, face 
wire, and spring line, used to make the towing vessel fast to her tow, 
must be available to the Coast Guard or third-party auditor for review. 
The following minimum information is required in the record: The dates 
when examinations were performed, the identification of each item of 
towing gear examined, and the name(s) of the person(s) conducting the 
examinations.



                        Subpart I_Vessel Records



Sec.  140.900  Marine casualty reporting.

    Each towing vessel must comply with the requirements of part 4 of 
this chapter for reporting marine casualties and retaining voyage 
records.

[[Page 16]]



Sec.  140.905  Official logbooks.

    (a) A towing vessel of the United States, except one on a voyage 
from a port in the United States to a port in Canada, is required by 46 
U.S.C. 11301 to have an official logbook if the vessel is:
    (1) On a voyage from a port in the United States to a foreign port; 
or
    (2) Of at least 100 gross tons and on a voyage between a port in the 
United States on the Atlantic Ocean and one on the Pacific Ocean.
    (b) The Coast Guard furnishes, without fee, to masters of vessels of 
the United States, the official logbook as Form CG-706B or CG-706C, 
depending on the number of persons employed as crew. The first several 
pages of this logbook list various acts of Congress governing logbooks 
and the entries required in them.
    (c) When a voyage is completed, or after a specified time has 
elapsed, the master must file the official logbook containing required 
entries with the cognizant OCMI at or nearest the port where the vessel 
may be.



Sec.  140.910  Towing vessel record or record specified by TSMS.

    (a) This section applies to a towing vessel other than a vessel 
operating only in a limited geographic area or a vessel required by 
Sec.  140.905 to maintain an official logbook.
    (b) A towing vessel subject to this section must maintain a TVR or 
in accordance with the TSMS applicable to the towing vessel.
    (c) The TVR must include a chronological record of events as 
required by this subchapter. The TVR may be electronic or paper.
    (d) Except as required by Sec. Sec.  140.900 and 140.905, records do 
not need to be filed with the Coast Guard, but must be kept available 
for review by the Coast Guard upon request. Records, unless required to 
be maintained for a longer period by statute or other federal 
regulation, must be retained for at least 1 year after the date of the 
latest entry.



Sec.  140.915  Items to be recorded.

    (a) The following list of items must be recorded in the TVR, 
official logbook, or in accordance with the TSMS applicable to the 
vessel:
    (1) Personnel records, in accordance with Sec.  140.400;
    (2) Safety orientation, in accordance with Sec.  140.410;
    (3) Record of drills and instruction, in accordance with Sec.  
140.420;
    (4) Examinations and tests, in accordance with Sec.  140.615;
    (5) Operative navigational safety equipment, in accordance with 
Sec.  140.620;
    (6) Navigation assessment, in accordance with Sec.  140.635;
    (7) Navigation safety training, in accordance with Sec.  140.645;
    (8) Oil residue discharges and disposals, in accordance with Sec.  
140.655;
    (9) Record of inspection of towing gear, in accordance with Sec.  
140.820; and
    (10) Fire-detection and fixed fire-extinguishing, in accordance with 
Sec.  142.240.
    (b) For the purposes of this subchapter, if items are recorded 
electronically in a TVR or other record as specified by the TSMS 
applicable to the towing vessel, these electronic entries must include 
the date and time of entry and name of the person making the entry. If 
after an entry has been made, someone responsible for entries determines 
there is an error in an entry, any entries to correct the error must 
include the date and time of entry and name of the person making the 
correction and must preserve a record of the original entry being 
corrected.
    Note to Sec.  140.915. For towing vessels subject to 46 U.S.C. 
11301, there are statutory requirements in that U.S. Code section for 
additional items that must be entered in the official logbook. Regarding 
requirements outside this subchapter, such as requirements in 33 CFR 
151.25 to make entries in an oil record book, Sec.  140.915 does not 
change those requirements.



                           Subpart J_Penalties



Sec.  140.1000  Statutory penalties.

    Violations of the provisions of this subchapter will subject the 
violator to the applicable penalty provisions of Subtitle II of Title 
46, and Title 18, United States Code.

[[Page 17]]



Sec.  140.1005  Suspension and revocation.

    An individual is subject to proceedings under the provisions of 46 
U.S.C. 7703 and 7704, and part 5 of this chapter with respect to 
suspension or revocation of a license, certificate, document, or 
credential if the individual holds a license, certificate of registry, 
merchant mariner document, or merchant mariner credential and:
    (a) Commits an act of misconduct, negligence or incompetence;
    (b) Uses or is addicted to a dangerous drug; or
    (c) Violates or fails to comply with this subchapter or any other 
law or regulation intended to promote marine safety; or
    (d) Becomes a security risk, as described in 46 U.S.C. 7703.



PART 141_LIFESAVING--Table of Contents



                            Subpart A_General

Sec.
141.100 Purpose.
141.105 Applicability and delayed implementation for existing vessels.

            Subpart B_General Requirements for Towing Vessels

141.200 General provisions.
141.225 Alternate arrangements or equipment.
141.230 Readiness.
141.235 Inspection, testing, and maintenance.
141.240 Requirements for training crews.

          Subpart C_Lifesaving Requirements for Towing Vessels

141.305 Survival craft requirements for towing vessels.
141.310 Stowage of survival craft.
141.315 Marking of survival craft and stowage locations.
141.320 Inflatable survival craft placards.
141.325 Survival craft equipment.
141.330 Skiffs as survival craft.
141.340 Lifejackets.
141.350 Immersion suits.
141.360 Lifebuoys.
141.370 Miscellaneous lifesaving requirements for towing vessels.
141.375 Visual distress signals.
141.380 Emergency position indicating radio beacon (EPIRB).
141.385 Line throwing appliance.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 
CFR 1.05; DHS Delegation 0170.1.

    Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless 
otherwise noted.



                            Subpart A_General



Sec.  141.100  Purpose.

    This part contains requirements for lifesaving equipment, 
arrangements, systems, and procedures on towing vessels.



Sec.  141.105  Applicability and delayed implementation for
existing vessels.

    (a) This part applies to all towing vessels subject to this 
subchapter.
    (1) An existing towing vessel must comply with the requirements in 
this part no later than either July 20, 2018 or the date the vessel 
obtains a Certificate of Inspection (COI), whichever date is earlier.
    (2) The delayed implementation provisions in paragraph (a)(1) of 
this section do not apply to a new towing vessel.
    (b) A towing vessel on an international voyage, subject to SOLAS 
(incorporated by reference, see Sec.  136.112 of this subchapter), must 
meet the applicable requirements in subchapter W of this chapter.
    (c) Towing vessels in compliance with SOLAS Chapter III will be 
deemed in compliance with this part.



            Subpart B_General Requirements for Towing Vessels



Sec.  141.200  General provisions.

    (a) Unless otherwise specified, all lifesaving equipment must be 
approved by the Commandant under the approval series specified in each 
section. Lifesaving equipment for personal use which is not required by 
this part need not be approved by the Commandant.
    (b) A listing of approved equipment and materials may be found at 
https://cgmix.uscg.mil/equipment. Each cognizant Officer in Charge, 
Marine Inspection (OCMI) may be contacted for information concerning 
approved equipment and materials.
    (c) Equipment requirements are based on the area in which a towing 
vessel is operating, not the route for

[[Page 18]]

which it is certificated. However, the towing vessel must be equipped 
per the requirements of its certificated route at the time of 
certification.



Sec.  141.225  Alternate arrangements or equipment.

    (a) Alternate arrangements or equipment to comply with this part may 
be approved in accordance with Sec.  136.115 of this subchapter.
    (b) If a Towing Safety Management System (TSMS) is applicable to the 
towing vessel, alternative means for complying with Sec. Sec.  141.340, 
141.350, and 141.360 may be approved by a third-party organization (TPO) 
and documented in the TSMS applicable to the vessel.
    (c) The Coast Guard may approve a novel lifesaving appliance or 
arrangement as an equivalent if it has performance characteristics at 
least equivalent to the appliance or arrangement required under this 
subchapter, and if it has been evaluated and tested under IMO Resolution 
A.520(13) (incorporated by reference, see Sec.  136.112 of this 
subchapter). Requests for evaluation of novel lifesaving appliances must 
be sent to the Commandant (CG-ENG).
    (d) The cognizant OCMI may require a towing vessel to carry 
specialized or additional lifesaving equipment if:
    (1) He or she determines that the conditions of the voyage render 
the requirements of this part inadequate; or
    (2) The towing vessel is operated in globally remote areas or severe 
environments not covered under this part. Such areas may include, but 
are not limited to, polar regions, remote islands, areas of extreme 
weather, and other remote areas where timely emergency assistance cannot 
be anticipated.



Sec.  141.230  Readiness.

    The master must ensure that all lifesaving equipment is properly 
maintained and ready for use at all times.



Sec.  141.235  Inspection, testing, and maintenance.

    (a) All lifesaving equipment must be tested and maintained in 
accordance with the minimum requirements of Sec.  199.190 of this 
chapter, as applicable, and the vessel's TSMS, if the vessel has a TSMS.
    (b) Inspections and tests of lifesaving equipment must be recorded 
in the TVR, official logbook, or in accordance with any TSMS applicable 
to the vessel. The following minimum information is required:
    (1) The dates when inspections and tests were performed, the number 
or other identification of each unit inspected and tested, the results 
of the inspections and tests, and the name of the crewmember, surveyor 
or auditor and any others conducting the inspections and tests; and
    (2) Receipts and other records documenting these inspections and 
tests must be retained for at least 1 year after the expiration of the 
COI and made available upon request.



Sec.  141.240  Requirements for training crews.

    Training requirements are contained in part 140 of this subchapter.



          Subpart C_Lifesaving Requirements for Towing Vessels



Sec.  141.305  Survival craft requirements for towing vessels.

    (a) General purpose. Survival craft provide a means for survival 
when evacuation from the towing vessel is necessary. The craft and 
related equipment should be selected so as to provide for the basic 
needs of the crew, such as shelter from life threatening elements, until 
rescue resources are expected to arrive, taking into account the scope 
and nature of the towing vessel's operations.
    (b) Functional requirements. A towing vessel's survival craft must 
meet the functional requirements of paragraphs (b)(1) through (5) of 
this section. Functional requirements describe the objectives of the 
regulation. Survival craft must:
    (1) Be readily accessible;
    (2) Have an aggregate capacity sufficient to accommodate the total 
number of individuals onboard, as specified in paragraph (c) of this 
section;
    (3) Provide a means for sheltering its complement appropriate to the 
route;

[[Page 19]]

    (4) Provide minimum equipment for survival if recovery time is 
expected to be greater than 24 hours; and
    (5) Be marked so that an individual not familiar with the operation 
of the specific survival craft has sufficient guidance to utilize the 
craft for its intended use.
    (c) Compliance options. A towing vessel must meet the applicable 
functional requirements. Compliance with the functional requirements of 
paragraph (b) of this section may be met by one of these two options:
    (1) A towing vessel that meets the prescriptive requirements of 
paragraph (d) of this section will have complied with the functional 
requirements; or
    (2) If an owner or managing operator chooses to meet the functional 
requirement through means other than as specified in paragraph (c)(1) of 
this section, the means must be accepted by the cognizant OCMI or, if 
the vessel has a TSMS, then by a TPO and, in the latter case, documented 
in the TSMS applicable to the vessel. The design, testing, and 
examination scheme for meeting these functional requirements must be 
included as part of the TSMS applicable to the vessel.
    (d) Prescriptive requirements. (1) Except as provided in paragraphs 
(d)(2) through (4) of this section, each towing vessel must carry the 
survival craft specified in Table 141.305 of this section, as 
appropriate for the towing vessel, in an aggregate capacity to 
accommodate the total number of individuals onboard.

                                          Table 141.305--Survival Craft
----------------------------------------------------------------------------------------------------------------
                                                                Area of operation
                                --------------------------------------------------------------------------------
                                                        Great Lakes and lakes,    Coastwise and ltd.
                                                          bays, and sounds as          coastwise
                                    Limited                 defined in Sec.    ------------------------
  Equipment (approval series)     geographic                    136.110
                                    area or     Rivers ------------------------    <=3                   Oceans
                                   protected               <=3                    miles   3
                                    waters                miles   3    from     miles from
                                                          from     miles from     shore       shore
                                                          shore       shore
----------------------------------------------------------------------------------------------------------------
                                              Cold Water Operation
----------------------------------------------------------------------------------------------------------------
Inflatable Buoyant Apparatus     None \1\....      \2\  \2\ 100%  ............  \2\ 100%
 (160.010).                                       100%
Inflatable Liferaft with SOLAS   None \1\....  .......  ........        100%    ........        100%
 B Pack (160.151).
Inflatable Liferaft with SOLAS   None \1\....  .......  ........  ............  ........  ............      100%
 A Pack (160.151).
----------------------------------------------------------------------------------------------------------------
                                              Warm Water Operation
----------------------------------------------------------------------------------------------------------------
Rigid Buoyant Apparatus          None \1\....      \2\  \2\ 100%    \2\ 100%    \2\ 100%
 (160.010).                                       100%
Inflatable Liferaft with SOLAS   None \1\....  .......  ........  ............  ........    \3\ 100%
 B Pack (160.151).
Inflatable Liferaft with SOLAS   None \1\....  .......  ........  ............  ........  ............      100%
 A Pack (160.151).
----------------------------------------------------------------------------------------------------------------
\1\ No survival craft are required unless deemed necessary by the cognizant OCMI or a TSMS applicable to the
  towing vessel.
\2\ A skiff that meets requirements in Sec.   141.330(a) through (f) may be substituted for all or part of
  required equipment.
\3\ Inflatable buoyant apparatus (approval series 160.010) may be accepted or substituted if the vessel carries
  a 406 MHz Cat 1 emergency position indicating radio beacon (EPIRB) meeting 47 CFR part 80.

    (2) The following approved survival craft may be substituted for 
survival craft required by Table 141.305 of this section:
    (i) A lifeboat approved under approval series 160.135 may be 
substituted for any survival craft required by this section, provided it 
is arranged and equipped in accordance with part 199 of this chapter.
    (ii) An inflatable liferaft approved under approval series 160.051 
or 160.151, may be substituted for an inflatable buoyant apparatus or 
rigid buoyant apparatus.
    (iii) An inflatable buoyant apparatus approved under approval series 
160.010 may be substituted for a rigid buoyant apparatus.
    (iv) A life float approved under approval series 160.027 may be 
substituted for a rigid buoyant apparatus.
    (3) Unless it is determined to be necessary by the cognizant OCMI 
under Sec.  141.225, or a TSMS applicable to the towing vessel, each 
towing vessel that operates solely on rivers need not carry survival 
craft if:
    (i) It carries a 406 MHz Cat 1 EPIRB meeting 47 CFR part 80;

[[Page 20]]

    (ii) It is designed for pushing ahead and has a TSMS that contains 
procedures for evacuating crewmembers onto the tow or other safe 
location; or
    (iii) It operates within 1 mile of shore.
    (4) A towing vessel which is not required by this part to carry 
survival craft may carry a non-approved survival craft as excess 
equipment, provided that it is maintained in good working condition and 
maintained according to the manufacturer's instructions.



Sec.  141.310  Stowage of survival craft.

    Survival craft must be stowed in accordance with the requirements of 
Sec.  199.130 of this chapter, as far as is practicable on existing 
towing vessels.



Sec.  141.315  Marking of survival craft and stowage locations.

    Survival craft and stowage locations must be marked in accordance 
with the requirements of Sec. Sec.  199.176 and 199.178 of this chapter.



Sec.  141.320  Inflatable survival craft placards.

    Every towing vessel equipped with an inflatable survival craft must 
have, in conspicuous places near each inflatable survival craft, 
approved placards or other posted instructions for launching and 
inflating inflatable survival craft.



Sec.  141.325  Survival craft equipment.

    (a) Each item of survival craft equipment must be of good quality, 
effective for the purpose it is intended to serve, and secured to the 
craft.
    (b) Each towing vessel carrying a lifeboat must carry equipment in 
accordance with Sec.  199.175 of this chapter.
    (c) Each life float and rigid buoyant apparatus must be fitted with 
a lifeline, pendants, a painter, and floating electric water light 
approved under approval series 161.010.



Sec.  141.330  Skiffs as survival craft.

    A skiff may be substituted for all or part of the approved survival 
craft for towing vessels that do not operate more than 3 miles from 
shore. A skiff used as a survival craft does not require Coast Guard 
approval but must:
    (a) Be capable of being launched within 5 minutes under all 
circumstances;
    (b) Be of suitable size for all persons on board the towing vessel;
    (c) Not exceed the loading specified on the capacity plate required 
by 33 CFR 183.23;
    (d) Not contain modifications affecting the buoyancy or structure of 
the skiff;
    (e) Be of suitable design for the vessel's intended service; and
    (f) Be marked in accordance with Sec. Sec.  199.176 and 199.178 of 
this chapter.



Sec.  141.340  Lifejackets.

    (a) Each towing vessel must carry at least one appropriately-sized 
lifejacket, approved under approval series 160.002, 160.005, 160.055, 
160.155, or 160.176, for each person on board.
    (b) For towing vessels with berthing aboard, a sufficient number of 
additional lifejackets must be carried so that a lifejacket is 
immediately available for persons at each normally manned watch station.
    (c) Where alternative means are used to meet the requirements of 
this section, as permitted by Sec.  141.225, there must be at least one 
lifejacket for each person onboard. Any TSMS applicable to the towing 
vessel must specify the number and location of lifejackets in such a 
manner as to facilitate immediate accessibility at normally occupied 
spaces including, but not limited to, accommodation spaces and watch 
stations.
    (d) Lifejackets must be readily accessible.
    (e) If the towing vessel carries inflatable lifejackets they must be 
of similar design to each other and have the same mode of operation.
    (f) Each lifejacket must be marked:
    (1) In block capital letters with the name of the vessel; and
    (2) With Type I retro-reflective material approved under approval 
series 164.018. The arrangement of the retro-reflective material must 
meet IMO Resolution A.658(16) (incorporated by reference, see Sec.  
136.112 of this subchapter).
    (g) Lifejackets must have the following attachments and fittings:

[[Page 21]]

    (1) Each lifejacket must have a lifejacket light approved under 
approval series 161.012 or 161.112 securely attached to the front 
shoulder area of the lifejacket.
    (2) Each lifejacket must have a whistle firmly secured by a cord to 
the lifejacket.
    (h) Stowage positions for lifejackets stowed in a berthing space or 
stateroom and all lifejacket containers must be marked in block capital 
letters and numbers with the minimum quantity, identity, and, if sizes 
other than adult or universal sizes are used on the vessel, the size of 
the lifejackets stowed inside the container. The equipment may be 
identified in words or with the appropriate symbol from IMO Resolution 
A.760(18) (incorporated by reference, see Sec.  136.112 of this 
subchapter).



Sec.  141.350  Immersion suits.

    (a) Except as provided in paragraph (a)(4) of this section, each 
towing vessel operating north of lat. 32[deg] N. or south of lat. 
32[deg] S. must carry the number of immersion suits as prescribed in 
this paragraph (a):
    (1) Each towing vessel operating in those regions must carry at 
least one appropriate-size immersion suit, approved under approval 
series 160.171, for each person onboard.
    (2) In addition to the immersion suits required under paragraph 
(a)(1) of this section, each watch station, work station, and industrial 
work site must have enough immersion suits to equal the number of 
persons normally on watch in, or assigned to, the station or site at one 
time. However, an immersion suit is not required at a station or site 
for a person whose cabin or berthing area (and the immersion suits 
stowed in that location) is readily accessible to the station or site.
    (3) Where alternative means are used to meet the requirements of 
this section, as permitted by Sec.  141.225, there must be at least one 
immersion suit of the appropriate size for each person onboard. Any TSMS 
applicable to the towing vessel must specify the number and location of 
immersion suits in such a manner as to facilitate immediate 
accessibility at normally occupied spaces including, but not limited to, 
accommodation spaces and watch stations.
    (4) A towing vessel operating on rivers or in a limited geographic 
area is not required to carry immersion suits.
    (b) Immersion suits carried on towing vessels must meet the 
requirements of Sec.  199.70(c) and (d) of this chapter.



Sec.  141.360  Lifebuoys.

    (a) A towing vessel must carry lifebuoys as follows:
    (1) A towing vessel less than 26 feet length must carry a minimum of 
one lifebuoy of not less than 510 millimeters (20 inches) in diameter.
    (2) A towing vessel of at least 26 feet, but less than 79 feet, in 
length must carry a minimum of two lifebuoys located on opposite sides 
of the vessel where personnel are normally present. Lifebuoys must be at 
least 610 millimeters (24 inches) in diameter.
    (3) A towing vessel 79 feet or more in length must carry four 
lifebuoys, with one lifebuoy located on each side of the operating 
station. Lifebuoys must be at least 610 millimeters (24 inches) in 
diameter.
    (4) Where alternative means are used to meet the requirements of 
this section, as permitted by Sec.  141.225, any TSMS applicable to the 
towing vessel must specify the number and location of lifebuoys in such 
a manner as to facilitate rapid deployment of lifebuoys from exposed 
decks, including the pilot house.
    (b) Each lifebuoy on a towing vessel must:
    (1) Be approved under approval series 160.050 or 160.150;
    (2) Be capable of being rapidly cast loose;
    (3) Not be permanently secured to the vessel in any way;
    (4) Be marked in block capital letters with the name of the vessel; 
and
    (5) Be orange in color, if on a vessel on an oceans or coastwise 
route.
    (c) Lifebuoys must have the following attachments and fittings:
    (1) At least one lifebuoy must have a lifeline, secured around the 
body of the lifebuoy. If more than one lifebuoy is carried, at least one 
must not have a lifeline attached. Each lifeline on a lifebuoy must:
    (i) Be buoyant;

[[Page 22]]

    (ii) Be of at least 18.3 meters (60 feet) in length;
    (iii) Be non-kinking;
    (iv) Have a diameter of at least 7.9 millimeters (\5/16\ inch);
    (v) Have a breaking strength of at least 5 kilonewtons (1,124 
pounds); and
    (vi) Be of a dark color if synthetic, or of a type certified to be 
resistant to deterioration from ultraviolet light.
    (2) At least two lifebuoys on a towing vessel greater than 26 feet 
must be fitted with a floating electric water light approved under 
approval series 161.010 or 161.110, unless the towing vessel is limited 
to daytime operation, in which case no floating electric water light is 
required.
    (3) If a towing vessel carries only one lifebuoy, the lifebuoy must 
be fitted with a floating electric water light approved under approval 
series 161.010 or 160.110, unless the towing vessel is limited to 
daytime operation, in which case no floating electric water light is 
required. The water light must be attached by the lanyard with a 
corrosion-resistant clip to allow the water light to be quickly 
disconnected from the lifebuoy. The clip must have a strength of at 
least 22.7 kilograms (50 pounds).
    (4) Each lifebuoy with a floating electric water light must have a 
lanyard of at least 910 millimeters (3 feet) in length, but not more 
than 1,830 millimeters (6 feet), securing the water light around the 
body of the lifebuoy.



Sec.  141.370  Miscellaneous life saving requirements for towing vessels.

    Miscellaneous lifesaving requirements are summarized in Table 
141.370 of this section. Equipment requirements are based on the area in 
which a towing vessel is operating, not the route for which it is 
certificated.

                                                    Table 141.370--Miscellaneous Lifesaving Equipment
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                   Area of operation
                              --------------------------------------------------------------------------------------------------------------------------
                                                                    Great Lakes and lakes, bays, and     Coastwise and ltd. coastwise
                                                                        sounds as defined in Sec.     ----------------------------------
  Equipment (46 CFR section)        Limited                                      136.110
                                geographic area       Rivers      ------------------------------------  <=3 miles from    3        Oceans
                                                                    <=3 miles from    <=3 miles from        shore          miles from
                                                                         shore             shore                             shore
--------------------------------------------------------------------------------------------------------------------------------------------------------
Visual Distress Signals (Sec.  3 day and 3       3 day and 3       3 day and 3       6 day and 6       3 day and 3      6 day and 6      6 day and 6
   141.375).                    night.            night.            night.            night.            night.           night.           night.
EPIRBs (Sec.   141.380)......  ................  ................  ................  1 \1\...........  1-.............  1..............  1
Line Throwing Appliances       ................  ................  ................  ................  ...............  1-.............  1
 (Sec.   141.385).
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Great Lakes service only.



Sec.  141.375  Visual distress signals.

    (a) Carriage requirement. A towing vessel must carry a combination 
of day and night visual distress signals indicated in Table 141.370 of 
Sec.  141.370 for specified areas where the vessel operates.
    (b) Day and night visual distress signals. Hand-held red flare 
distress signals, approved under approval series 160.021 or 160.121, and 
hand-held rocket-propelled parachute red flares, approved under approval 
series 160.036 or 160.136, are acceptable as both day and night signals.
    (c) Signals for day visual distress only. Floating orange smoke 
signals, approved under approval series 160.022, 160.122, or 160.157, 
and hand-held orange smoke distress signals, approved under approval 
series 160.037, are only acceptable as day signals.
    (d) Limited geographic area. A vessel operating in a limited 
geographic area on a short run limited to approximately 30 minutes away 
from the dock is not required to carry visual distress signals under 
this section.
    (e) Stowage. Each pyrotechnic distress signal carried to meet this 
section must be stowed in either:
    (1) A portable watertight container carried at the operating 
station. Portable watertight containers for pyrotechnic distress signals 
must be of a bright color and must be clearly marked in legible 
contrasting letters at least 12.7 millimeters (0.5 inches) high with 
``DISTRESS SIGNALS''; or

[[Page 23]]

    (2) A pyrotechnic locker secured above the freeboard deck, away from 
heat, in the vicinity of the operating station.



Sec.  141.380  Emergency position indicating radio beacon (EPIRB).

    (a) Each towing vessel operating on oceans, coastwise, limited 
coastwise, or beyond 3 nautical miles from shore upon the Great Lakes 
must carry a Category 1, 406 MHz satellite Emergency Position Indicating 
Radio Beacon (EPIRB) that meets the requirements of 47 CFR part 80.
    (b) When the towing vessel is underway, the EPIRB must be stowed in 
its float-free bracket with the controls set for automatic activation 
and be mounted in a manner so that it will float free if the towing 
vessel sinks.
    (c) The name of the towing vessel must be marked or painted in 
clearly legible letters on each EPIRB, except on an EPIRB in an 
inflatable liferaft.
    (d) The owner or managing operator must maintain valid proof of 
registration.
    Note to paragraph (d). Registration information can be found at 
www.beaconregistration.noaa.gov/.



Sec.  141.385  Line throwing appliance.

    Each towing vessel operating in oceans and coastwise service must 
have a line throwing appliance approved under approval series 160.040.
    (a) Stowage. The line throwing appliance and its equipment must be 
readily accessible for use.
    (b) Additional equipment. The line throwing appliance must have:
    (1) The equipment on the list provided by the manufacturer with the 
approved appliance; and
    (2) An auxiliary line that:
    (i) Is at least 450 meters (1,500 feet) long;
    (ii) Has a breaking strength of at least 40 kilonewtons (9,000 
pounds-force); and
    (iii) Is, if synthetic, of a dark color or certified by the 
manufacturer to be resistant to deterioration from ultraviolet light.



PART 142_FIRE PROTECTION--Table of Contents



                           Subpart A _General

Sec.
142.100 Purpose.
142.105 Applicability and delayed implementation for existing vessels.

            Subpart B_General Requirements for Towing Vessels

142.205 Alternate standards.
142.210 Alternate arrangements or equipment.
142.215 Approved equipment.
142.220 Fire hazards to be minimized.
142.225 Storage of flammable or combustible products.
142.226 Firefighter's outfit.
142.227 Fire axe.
142.230 Portable fire extinguishers and semi-portable fire-extinguishing 
          systems.
142.231 Exception for portable and semi-portable fire extinguishers 
          required for existing towing vessels.
142.235 Vessels contracted for prior to November 19, 1952.
142.240 Inspection, testing, maintenance, and records.
142.245 Requirements for training crews to respond to fires.

         Subpart C_Fire Extinguishing and Detection Requirements

142.300 Excepted vessels.
142.315 Additional fire-extinguishing equipment requirements.
142.325 Fire pumps, fire mains, and fire hoses.
142.330 Fire-detection system requirements.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 
CFR 1.05; DHS Delegation 0170.1.

    Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless 
otherwise noted.



                            Subpart A_General



Sec.  142.100  Purpose.

    This part contains requirements for fire suppression and detection 
equipment and arrangements on towing vessels.



Sec.  142.105  Applicability and delayed implementation for existing vessels.

    This part applies to all towing vessels subject to this subchapter.
    (a) An existing towing vessel must comply with the requirements in 
this part no later than either July 20, 2018

[[Page 24]]

or the date the vessel obtains a Certificate of Inspection (COI), 
whichever date is earlier.
    (b) The delayed implementation provisions in paragraph (a) of this 
section do not apply to a new towing vessel.



            Subpart B_General Requirements for Towing Vessels



Sec.  142.205  Alternate standards.

    (a) Towing vessels in compliance with Chapter II-2 of SOLAS 
(incorporated by reference, see Sec.  136.112 of this subchapter) will 
be deemed to be in compliance with this part.
    (b) Towing vessels that comply with other alternate standards, 
deemed by the Commandant to provide an equivalent level of safety and 
performance, will be in compliance with this part.



Sec.  142.210  Alternate arrangements or equipment.

    (a) Alternate arrangements or equipment to comply with this part may 
be approved in accordance with Sec.  136.115 of this subchapter.
    (b) All owners or operators of towing vessels with a Towing Safety 
Management System (TSMS) may comply with the requirements of subpart B 
of this part by outfitting their vessels with appropriate alternate 
arrangements or equipment so long as these variations provide an 
equivalent level of safety and performance and are properly documented 
in the TSMS.
    (c) The cognizant Officer in Charge, Marine Inspection (OCMI) may 
require a towing vessel to carry specialized or additional fire 
protection, suppression, or detection equipment if:
    (1) He or she determines that the conditions of the voyage render 
the requirements of this part inadequate; or
    (2) The towing vessel is operated in globally remote areas or severe 
environments not covered under this part. These areas may include, but 
are not limited to, polar regions, remote islands, areas of extreme 
weather, and other remote areas where timely emergency assistance cannot 
be anticipated.



Sec.  142.215  Approved equipment.

    (a) All portable fire extinguishers, semi-portable fire-
extinguishing systems, and fixed fire-extinguishing systems required by 
this part must be approved by the Commandant (CG-ENG). Where other 
equipment in this part is required to be approved, such equipment 
requires the specific approval of the Commandant.
    (b) A listing of approved equipment and materials may be found 
online at https://cgmix.uscg.mil/equipment. Each cognizant OCMI may be 
contacted for information concerning approved equipment and materials.
    (c) New installations of fire-extinguishing and fire-detection 
equipment of a type not required, or in excess of that required by this 
part, may be permitted--
    (1) If Coast Guard approved;
    (2) If accepted by the local OCMI or TPO, as applicable; or
    (3) If equipment and components are listed and labeled by an 
independent Nationally Recognized Testing Laboratory (NRTL), as that 
term is defined in 29 CFR 1910.7, and are designed, installed, tested, 
and maintained in accordance with an appropriate industry standard and 
the manufacturer's specific guidance.
    (d) Existing equipment and installations, of a type not required, or 
in excess of that required by this part, not meeting the applicable 
requirements of this part may be continued in service so long as they 
are in good condition and accepted by the local OCMI or TPO.

[USCG-2006-24412, 81 FR 40101, June 20, 2016, as amended by USCG-2017-
1060, 83 FR 8180, Feb. 26, 2018; USCG-2017-1060, 83 FR 53822, Oct. 25, 
2018]



Sec.  142.220  Fire hazards to be minimized.

    Each towing vessel must be maintained and operated so as to minimize 
fire hazards and to ensure the following:
    (a) All bilges and void spaces are kept free from accumulation of 
combustible and flammable materials and liquids insofar as practicable.
    (b) Storage areas are kept free from accumulation of combustible and 
flammable materials insofar as practicable.

[[Page 25]]



Sec.  142.225  Storage of flammable or combustible products.

    (a) Paints, coatings, or other flammable or combustible products 
onboard a towing vessel must be stored in a designated storage room or 
cabinet when not in use.
    (b) If a storage room is provided, it may be any room or compartment 
that is free of ignition sources.
    (c) If a dedicated storage cabinet is provided it must be secured to 
the vessel so that it does not move and must be either:
    (1) A flammable liquid storage cabinet that satisfies UL 1275 
(incorporated by reference, see Sec.  136.112 of this subchapter); or
    (2) A flammable liquid storage cabinet that satisfies FM Approvals 
Standard 6050 (incorporated by reference, see Sec.  136.112 of this 
subchapter); or
    (3) Another suitable steel container that provides an equivalent 
level of protection.
    (d) A 40-B portable fire extinguisher must be located near the 
storage room or cabinet. This is in addition to the portable fire 
extinguishers required by tables 142.230(a) and 142.230(b) of this part.

[USCG-2006-24412, 81 FR 40101, June 20, 2016, as amended by USCG-2017-
1060, 83 FR 8180, Feb. 26, 2018]



Sec.  142.226  Firefighter's outfit.

    Each towing vessel 79 feet or more in length operating on oceans and 
coastwise routes that does not have an installed fixed fire-
extinguishing system must have the following:
    (a) At least two firefighter's outfits that meet NFPA 1971 
(incorporated by reference, see Sec.  136.112 of this subchapter); and
    (b) Two self-contained breathing apparatus of the pressure demand, 
open circuit type, approved by the National Institute for Occupational 
Safety and Health (NIOSH), under 42 CFR part 84. The breathing apparatus 
must have a minimum 30-minute air supply and full facepiece.



Sec.  142.227  Fire axe.

    Each towing vessel must be equipped with at least one fire axe that 
is readily accessible for use from the exterior of the vessel.



Sec.  142.230  Portable fire extinguishers and semi-portable 
fire-extinguishing systems.

    (a) Towing vessels of 65 feet or less in length must carry at least 
the minimum number of portable fire extinguishers set forth in table 
142.230(a).

          Table 142.230(a)--10-B:C Portable Fire Extinguishers
------------------------------------------------------------------------
                                      Minimum number of 10-B:C portable
                                      fire extinguishers  required \1\
                                   -------------------------------------
           Length, feet               No fixed fire-      Fixed fire-
                                      extinguishing      extinguishing
                                        system in          system in
                                     machinery space    machinery space
------------------------------------------------------------------------
Under 26 \2\......................                  1                  0
26 and over, but under 40.........                  2                  1
40 and over, but not over 65......                  3                  2
------------------------------------------------------------------------
\1\ One 40-B:C portable fire extinguisher may be substituted for two 10-
  B:C portable fire extinguishers.
\2\ See Sec.   136.105 of this subchapter concerning vessels under 26
  feet.

    (b) Towing vessels of more than 65 feet in length must carry--
    (1) At least the minimum number of portable fire extinguishers set 
forth in table 142.230(b); and
    (2) One 40-B portable fire extinguisher fitted in the engine room 
for each 1,000 brake horsepower of the main engines or fraction thereof. 
A towing vessel is not required to carry more than six additional 40-B 
portable fire extinguishers in the engine room for this purpose, 
regardless of horsepower.

[[Page 26]]



          Table 142.230(b)--40-B:C Portable Fire Extinguishers
------------------------------------------------------------------------
                    Gross tonnage--                      Minimum number
-------------------------------------------------------     of 40-B:C
                                                          portable fire
                    Over                      Not over    extinguishers
------------------------------------------------------------------------
                                                    50                 1
50.........................................        100                 2
100........................................        500                 3
500........................................      1,000                 6
1,000......................................  .........                 8
------------------------------------------------------------------------

    (c) The frame or support of any semi-portable fire extinguisher 
fitted with wheels must be welded or otherwise permanently attached to a 
steel bulkhead or deck to prevent it from rolling under heavy sea 
conditions.
    (d) Extinguishers with larger numerical ratings or multiple letter 
designations may be used if the extinguishers meet the minimum 
requirements of this section.

[USCG-2017-1060, 83 FR 8180, Feb. 26, 2018]



Sec.  142.231  Exception for portable and semi-portable fire 
extinguishers required for existing towing vessels.

    (a) Previously installed fire extinguishers with extinguishing 
capacities smaller than what is required by Sec.  142.230 of this part 
need not be replaced and may be continued in service so long as they are 
maintained in good condition to the satisfaction of the OCMI.
    (b) All new equipment and installations must meet the applicable 
requirements in this part for new vessels.

[USCG-2017-1060, 83 FR 8181, Feb. 26, 2018]



Sec.  142.235  Vessels contracted for prior to November 19, 1952.

    (a) Towing vessels contracted for construction prior to November 19, 
1952, must meet the applicable provisions of this part concerning the 
number and general type of equipment required.
    (b) Existing equipment and installations previously approved, but 
not meeting the applicable requirements for approval by the Commandant, 
may be continued in service so long as they are in good condition.
    (c) All new installations and replacements must meet the 
requirements of this part.



Sec.  142.240  Inspection, testing, maintenance, and records.

    (a) Inspection and testing. All portable fire extinguishers, semi-
portable fire-extinguishing systems, fire-detection systems, and fixed 
fire-extinguishing systems, including ventilation, machinery shutdowns, 
and fixed fire-extinguishing system pressure-operated dampers on board 
the vessel, must be inspected or tested at least once every 12 months, 
as prescribed in paragraphs (a)(1) through (8) of this section, or more 
frequently if otherwise required by the TSMS applicable to the vessel.
    (1) Portable and semi-portable fire extinguishers must be inspected, 
maintained, and tested in accordance with the inspection, maintenance 
procedures, and hydrostatic pressure tests required by Chapters 7 and 8 
of NFPA 10, Standard for Portable Fire Extinguishers (incorporated by 
reference, see Sec.  136.112 of this subchapter), with the frequency 
specified by NFPA 10 and as amended here:
    (i) Certification or licensing by a state or local jurisdiction as a 
fire extinguisher servicing agency will be accepted by the Coast Guard 
as meeting the personnel certification requirements of NFPA 10 for 
annual maintenance and recharging of extinguishers.
    (ii) Monthly inspections required by NFPA 10 may be conducted by the 
owner, operator, person-in-charge, or a designated member of the crew.
    (iii) Non-rechargeable or non-refillable extinguishers must be 
inspected and maintained in accordance with NFPA 10; however, the annual 
maintenance need not be conducted by a certified person and can be 
conducted by the owner, operator, person-in-charge, or a designated 
member of the crew.
    (iv) The owner or managing operator must provide satisfactory 
evidence of the required servicing to the marine inspector or TPO, as 
applicable. If any of the equipment or records have not been properly 
maintained, a qualified servicing facility must perform the required 
inspections, maintenance procedures, and hydrostatic pressure tests. A 
tag issued by a qualified servicing organization, and attached to each 
extinguisher, may be accepted as evidence that the necessary maintenance 
procedures have been conducted.

[[Page 27]]

    (2) Fixed fire-extinguishing systems must be inspected and tested, 
as required by table 142.240 of this section, in addition to the tests 
required by Sec. Sec.  147.60 and 147.65 of subchapter N of this 
chapter.
    (3) Flexible connections and discharge hoses on all semi-portable 
extinguishers and fixed extinguishing systems must be inspected and 
tested in accordance with Sec.  147.65 of this chapter.
    (4) All cylinders containing compressed gas must be tested and 
marked in accordance with Sec.  147.60 of this chapter.
    (5) All piping, controls, valves, and alarms must be inspected; and 
the operation of controls, alarms, ventilation shutdowns, and pressure-
operated dampers for each fixed fire-extinguishing system and detecting 
system must be tested, to determine that the system is operating 
properly.
    (6) The fire main system must be charged, and sufficient pressure 
must be verified at the most remote and highest outlets.
    (7) All fire hoses must be inspected for excessive wear, and 
subjected to a test pressure equivalent to the maximum service pressure. 
All fire hoses which are defective and incapable of repair must be 
destroyed.
    (8) All smoke- and fire-detection systems, including detectors and 
alarms, must be tested.

 Table 142.240--Table 142.240 to paragraph (a)--Fixed fire-extinguishing
                                 systems
------------------------------------------------------------------------
            Type system                             Test
------------------------------------------------------------------------
Carbon dioxide....................  Weigh cylinders. Recharge if weight
                                     loss exceeds 10 percent of weight
                                     of the charge. Test time delays,
                                     alarms, and ventilation shutdowns
                                     with carbon dioxide, nitrogen, or
                                     other nonflammable gas as stated in
                                     the system manufacturer's
                                     instruction manual. Inspect hoses
                                     for damage or decay. Ensure that
                                     nozzles are unobstructed. Cylinders
                                     must be tested and marked, and all
                                     flexible connections on fixed
                                     carbon dioxide systems must be
                                     tested or renewed, as required by
                                     Sec.  Sec.   147.60 and 147.65 of
                                     this chapter.
Halon and Halocarbon..............  Recharge or replace if weight loss
                                     exceeds 5 percent of the weight of
                                     the charge or if cylinder has a
                                     pressure gauge, recharge cylinder
                                     if pressure loss exceeds 10 percent
                                     adjusted for temperature. Test time
                                     delays, alarms, and ventilation
                                     shutdowns with carbon dioxide,
                                     nitrogen, or other nonflammable gas
                                     as stated in the system
                                     manufacturer's instruction manual.
                                     Inspect hoses for damage or decay.
                                     Ensure that nozzles are
                                     unobstructed. Cylinders must be
                                     tested and marked, and all flexible
                                     connections to Halon 1301 and
                                     halocarbon cylinders must be tested
                                     or renewed, as required by Sec.
                                     Sec.   147.60 and 147.65 or Sec.
                                     147.67 of this chapter.
                                    NOTE: Halon 1301 system approvals
                                     have expired, but existing systems
                                     may be retained if they are in good
                                     and serviceable condition to the
                                     satisfaction of the Coast Guard
                                     inspector.
Dry Chemical (cartridge operated).  Inspect pressure cartridge and
                                     replace if end is punctured or if
                                     determined to have leaked or is in
                                     an unsuitable condition. Inspect
                                     hose and nozzle to see if they are
                                     clear. Insert charged cartridge.
                                     Ensure dry chemical is free flowing
                                     (not caked) and extinguisher
                                     contains full charge.
Dry chemical (stored pressure)....  See that pressure gauge is within
                                     operating range. If not, or if the
                                     seal is broken, weigh or otherwise
                                     determine that extinguisher is
                                     fully charged with dry chemical.
                                     Recharge if pressure is low or dry
                                     chemical is needed.
Foam (stored pressure)............  See that pressure gauge, if so
                                     equipped, is within the operating
                                     range. If not, or if the seal is
                                     broken, weigh or otherwise
                                     determine that extinguisher is
                                     fully charged with foam. Recharge
                                     if pressure is low or foam is
                                     needed. Replace premixed agent
                                     every 3 years.
Inert gas.........................  Recharge or replace if cylinder
                                     pressure loss exceeds 5 percent,
                                     adjusted for temperature. Test time
                                     delays, alarms, and ventilation
                                     shutdowns with carbon dioxide,
                                     nitrogen, or other nonflammable gas
                                     as stated in the system
                                     manufacturer's instruction manual.
                                     Inspect hoses and nozzles to ensure
                                     they are clear.
Water mist........................  Test and inspect system in
                                     accordance with the maintenance
                                     instructions in the system
                                     manufacturer's design,
                                     installation, operation, and
                                     maintenance manual.
------------------------------------------------------------------------

    (b) Maintenance. In addition to the requirements in paragraph (a) of 
this section, all fire-suppression and detection equipment and systems 
on board a towing vessel must be maintained in accordance with the 
attached nameplate, manufacturer's approved design manual, or as 
otherwise provided in any TSMS applicable to the vessel.
    (c) Records. (1) The records of inspections and tests of fire-
detection systems and fixed fire-extinguishing systems must be recorded 
in the TVR, official logbook, or in accordance with any TSMS applicable 
to the vessel. The following minimum information is required:
    (i) The dates when inspections and tests were performed, the number 
and

[[Page 28]]

any other identification of each unit inspected and tested, the results 
of the inspections and tests, and the name of the crewmember, surveyor 
or auditor and any others conducting the inspections and tests, must be 
included.
    (ii) Receipts and other records generated by these inspections and 
tests must be retained for at least 1 year and made available upon 
request.
    (2) The records of inspections and tests of portable fire 
extinguishers and semi-portable fire-extinguishing systems may be 
recorded in accordance with paragraph (c)(1) of this section, or on a 
tag attached to each unit by a qualified servicing organization.

[USCG-2006-24412, 81 FR 40101, June 20, 2016, as amended by USCG-2017-
1060, 83 FR 8181, Feb. 26, 2018]



Sec.  142.245  Requirements for training crews to respond to fires.

    (a) Drills and instruction. The master of a towing vessel must 
ensure that each crewmember participates in fire-fighting drills and 
receives instruction at least once each month. The instruction may 
coincide with the drills, but is not required to do so. All crewmembers 
must be familiar with their fire-fighting duties, and, specifically how 
to:
    (1) Fight a fire in the engine room and elsewhere onboard the towing 
vessel, including how to:
    (i) Operate all of the fire-extinguishing equipment onboard the 
towing vessel;
    (ii) Stop any mechanical ventilation system for the engine room and 
effectively seal all natural openings to the space to prevent leakage of 
the extinguishing agent; and
    (iii) Operate the fuel shut-off(s) for the engine room.
    (2) Activate the general alarm;
    (3) Report inoperative alarm systems and fire-detection systems; and
    (4) Don a firefighter's outfit and a self-contained breathing 
apparatus, if the vessel is so equipped.
    (b) Alternative form of instruction. Video training, followed by a 
discussion led by someone familiar with the contingencies listed in 
paragraph (a) of this section, is an acceptable, alternative form of 
instruction. This instruction may occur either onboard or off the towing 
vessel.
    (c) Participation in drills. Drills must take place onboard the 
towing vessel as if there were an actual emergency. They must include:
    (1) Participation by all crewmembers;
    (2) Breaking out and using, or simulating the use of, emergency 
equipment;
    (3) Testing of all alarm and detection systems by operation of the 
test switch or by activation of one or more devices;
    (4) Putting on protective clothing by at least one person, if the 
towing vessel is so equipped; and
    (5) Functionally testing the self-priming capability of the portable 
fire pump, if the towing vessel is so equipped.
    (d) Safety orientation. The master must ensure that each crewmember 
who has not participated in the drills required by paragraph (a) of this 
section and received the instruction required by that paragraph (a) 
receives a safety orientation within 24 hours of reporting for duty. The 
safety orientation must cover the particular contingencies listed in 
paragraph (a) of this section.
    Note to Sec.  142.245. See Sec.  140.915 for requirements for 
keeping records of training.



    Subpart C_Fire Extinguishing and Detection Equipment Requirements



Sec.  142.300  Excepted vessels.

    Excepted vessels, as defined in Sec.  136.110 of this subchapter, 
need not comply with the provisions of Sec. Sec.  142.315 through 
142.330.



Sec.  142.315  Additional fire-extinguishing equipment requirements.

    (a) A towing vessel that is:
    (1) Certificated for rivers, lakes, bays, and sounds, less than 3 
nautical miles from shore on the Great Lakes; or
    (2) Certificated for limited coastwise, coastwise, oceans or waters 
beyond 3 nautical miles from shore on the Great Lakes, whose contract 
for construction was executed prior to August 27, 2003; or

[[Page 29]]

    (3) Pushing a barge ahead or hauling a barge alongside, when the 
barge's coastwise, limited coastwise, or Great Lakes route is 
restricted, as indicated on its COI, so that the barge may operate ``in 
fair weather only, within 12 miles of shore'' or with words to that 
effect, must be equipped with either:
    (i) An approved 160-B semi-portable fire-extinguishing system to 
protect the engine room; or
    (ii) A fixed fire-extinguishing system installed to protect the 
engine room.
    (b) A towing vessel that is certificated for limited coastwise, 
coastwise, oceans, or beyond 3 nautical miles from shore on the Great 
Lakes whose contract for construction was executed on or after August 
27, 2003, except for those specified in paragraph (a)(3) of this 
section, must be equipped with both:
    (1) An approved 160-B semi-portable fire-extinguishing system to 
protect the engine room; and
    (2) A fixed fire-extinguishing system installed to protect the 
engine room.

[USCG-2006-24412, 81 FR 40101, June 20, 2016, as amended by USCG-2017-
1060, 83 FR 8181, Feb. 26, 2018]



Sec.  142.325  Fire pumps, fire mains, and fire hoses.

    Each towing vessel must have either a self-priming, power-driven, 
fixed fire pump, a fire main, and hoses and nozzles in accordance with 
paragraphs (a) through (d) of this section; or a portable pump, and 
hoses and nozzles, in accordance with paragraphs (e) and (f) of this 
section.
    (a) A fixed fire pump must be capable of:
    (1) Delivering water simultaneously from the two highest hydrants, 
or from both branches of the fitting if the highest hydrant has a 
Siamese fitting, at a pitot-tube pressure of at least 344 kilopascals 
(kPa) (50 pounds per square inch (psi)), and a flow rate of at least 300 
liters per minute (lpm) (80 gallons per minute (gpm)); and
    (2) Being energized remotely from a safe place outside the engine 
room and at the pump.
    (b) All suction valves necessary for the operation of the fire main 
must be kept in the open position or capable of operation from the same 
place where the remote fire pump control is located.
    (c) The fire main must have a sufficient number of fire hydrants 
with attached hose to allow a stream of water to reach any part of the 
machinery space using a single length of fire hose.
    (d) The hose must be a lined commercial fire hose 15 meters (50 
feet) in length, at least 40 millimeters (1.5 inches) in diameter, and 
fitted with a nozzle made of corrosion-resistant material capable of 
providing a solid stream and a spray pattern.
    (e) The portable fire pump must be self-priming and power-driven, 
with:
    (1) A minimum capacity of at least 300 LPM (80 gpm) at a discharge 
gauge pressure of not less than 414 kPa (60 psi), measured at the pump 
discharge;
    (2) A sufficient amount of lined commercial fire hose 15 meters (50 
feet) in length, at least 40 mm (1.5 inches) in diameter and immediately 
available to attach to it so that a stream of water will reach any part 
of the vessel; and
    (3) A nozzle made of corrosion-resistant material capable of 
providing a solid stream and a spray pattern.
    (f) The pump must be stowed with its hose and nozzle outside of the 
machinery space.



Sec.  142.330  Fire-detection system requirements.

    (a) Fire-detection systems. Except as provided in paragraph (a)(8) 
of this section, each towing vessel must have a fire-detection system 
installed to detect engine room fires. The owner or managing operator 
must ensure the following:
    (1) Each detector, control panel, remote indicator panel, and fire 
alarm are approved by the Commandant under approval series 161.002 or 
listed by a NRTL as set forth in 29 CFR 1910.7;
    (2) The system is installed, tested, and maintained in accordance 
with the manufacturer's design manual;
    (3) The system is arranged and installed so a fire in the engine 
room automatically sets off alarms on a fire detection control panel at 
the operating station. On vessels with more than one operating station, 
only one of

[[Page 30]]

them must be outfitted with a fire detection control panel. Any other 
operating station must be outfitted with either a fire detection control 
panel or a remote indicator panel;
    (4) The control panel includes:
    (i) A power available light;
    (ii) An audible to notify crew of a fire;
    (iii) Visual alarm alarms to identify the zone or zones of origin of 
the fire;
    (iv) A means to silence the audible alarm while maintaining 
indication by the visual alarms;
    (v) A circuit-fault detector test-switch, or internal supervision of 
circuit integrity; and
    (vi) Labels for all switches and indicator lights, identifying their 
functions.
    (5) The system draws power from two sources. Switchover from the 
primary source to the secondary source may be either manual or 
automatic;
    (6) The system serves no other purpose, unless it is an engine room 
monitoring system complying with paragraph (a)(8) of this section; and
    (7) The design of the system and its installation on the towing 
vessel is certified and inspected by a registered professional engineer 
with experience in fire-detection system design, by a technician with 
qualifications as a National Institute for Certification in Engineering 
Technologies (NICET) level IV fire alarm engineering technician, or by 
an authorized classification society with equivalent experience, to 
comply with paragraphs (a)(1) through (6) of this section.
    (8) A towing vessel whose construction was contracted for prior to 
January 18, 2000, may use an existing engine room monitoring system 
(with fire-detection capability) instead of a fire-detection system, if 
the monitoring system is operable and complies with paragraphs (a)(2) 
through (7) of this section, and uses detectors listed by an NRTL.
    (b) Smoke detection in berthing spaces. Each towing vessel must be 
equipped with a means to detect smoke in the berthing spaces and lounges 
that alerts individuals in those spaces. This may be accomplished by an 
installed detection system, or by using individual battery-operated 
detectors meeting UL 217 (incorporated by reference, see Sec.  136.112 
of this subchapter). Detection systems or individual detectors must be 
kept operational at all times when the crew is onboard the towing 
vessel.
    (c) Heat-detection system in galley. Each new towing vessel equipped 
with a galley must have a heat-detection system with one or more 
restorable heat-sensing detectors to detect fires in the galley. The 
system must be arranged to sound an audible alarm at each operating 
station. This may be a separate zone in the detection system required by 
paragraph (a) of this section, or a separate detection system complying 
with paragraphs (a)(1) and (2) of this section.



PART 143_MACHINERY AND ELECTRICAL SYSTEMS AND EQUIPMENT--Table of Contents



                            Subpart A_General

Sec.
143.100 Purpose.
143.105 Applicability.
143.115 Definitions.

              Subpart B_Requirements for All Towing Vessels

143.200 Applicability.
143.205 General.
143.210 Alternate design or operational considerations.
143.215 Existing vessels built to class.
143.220 Machinery space fire prevention.
143.225 Control and monitoring requirements.
143.230 Alarms and monitoring.
143.235 General alarms.
143.240 Communication requirements.
143.245 Readiness and testing.
143.250 System isolation and markings.
143.255 Fuel system requirements.
143.260 Fuel shutoff requirements.
143.265 Additional fuel system requirements for towing vessels built 
          after January 18, 2000.
143.270 Piping systems and tanks.
143.275 Bilge pumps or other dewatering capability.
143.300 Pressure vessels.
143.400 Electrical systems, general.
143.410 Shipboard lighting.
143.415 Navigation lights.
143.450 Pilothouse alerter system.
143.460 Towing machinery.

[[Page 31]]

              Subpart C_Requirements for New Towing Vessels

143.500 Applicability.
143.510 Verification of compliance with design standards.
143.515 Towing vessels built to recognized classification society rules.
143.520 Towing vessels built to American Boat and Yacht Council 
          standards.
143.540 Pumps, pipes, valves, and fittings for essential systems.
143.545 Pressure vessels.
143.550 Steering systems.
143.555 Electrical power sources, generators, and motors.
143.560 Electrical distribution panels and switchboards.
143.565 Electrical overcurrent protection other than generators and 
          motors.
143.570 Electrical grounding and ground detection.
143.575 Electrical conductors, connections, and equipment.
143.580 Alternative electrical installations.
143.585 General requirements for propulsion, steering, and related 
          controls on vessels that move tank barges carrying oil or 
          hazardous material in bulk.
143.590 Propulsor redundancy on vessels that move tank barges carrying 
          oil or hazardous material in bulk.
143.595 Vessels with one propulsor that move tank barges carrying oil or 
          hazardous material in bulk.
143.600 Alternative standards for vessels that move tank barges carrying 
          oil or hazardous material in bulk.
143.605 Demonstration of compliance on vessels that move tank barges 
          carrying oil or hazardous material in bulk.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 
CFR 1.05; DHS Delegation No. 0170.1.

    Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless 
otherwise noted.



                            Subpart A_General



Sec.  143.100  Purpose.

    This part contains requirements for the design, installation, and 
operation of primary and auxiliary machinery and electrical systems and 
equipment on towing vessels.



Sec.  143.105  Applicability.

    This part applies to all towing vessels subject to this subchapter. 
The specific applicability of requirements in each subpart is set forth 
in that subpart.



Sec.  143.115  Definitions.

    The definitions provided in Sec.  136.110 of this subchapter apply 
to this part. In addition, the following definition applies exclusively 
to this part:
    Independent means the equipment is arranged to perform its required 
function regardless of the state of operation, or failure, of other 
equipment.



              Subpart B_Requirements for All Towing Vessels



Sec.  143.200  Applicability.

    (a) This subpart applies to all towing vessels subject to this 
subchapter.
    (b) Except as noted paragraph (c) of this section, which lists later 
implementation dates for requirements in Sec. Sec.  143.450 and 143.460, 
an existing towing vessel must comply with the applicable requirements 
in this part no later than either July 20, 2018 or the date the vessel 
obtains a Certificate of Inspection (COI), whichever date is earlier. 
The delayed implementation provisions in this section do not apply to a 
new towing vessel.
    (c) Existing vessels must meet the pilothouse alerter and towing 
machinery requirements of Sec. Sec.  143.450 and 143.460 no later than 5 
years after the issuance of the first COI for the vessel.



Sec.  143.205  General.

    (a) Machinery and electrical systems must be designed and maintained 
to provide for safe operation of the towing vessel and safety of persons 
onboard under normal and emergency conditions.
    (b) The crew of each towing vessel must demonstrate the ability to 
operate the primary and auxiliary machinery and electrical systems for 
which they are responsible, and to do so under normal and emergency 
conditions. This includes, but is not limited to, responses to alarms 
and restoration of propulsion and steering in the event of failure.
    (c) Propulsion machinery, including main engines, reduction gears, 
shafting, bearings, and electrical equipment and systems, must:
    (1) Be maintained to ensure proper operation;

[[Page 32]]

    (2) Be suitable for route and service; and
    (3) Have suitable propulsion controls to provide the operator full 
control at each operating station.
    (d) Repairs and minor alterations to existing towing vessels must be 
made in accordance with this part. New installations that are not 
replacements in kind must comply with the requirements of subpart C of 
this part, if applicable.



Sec.  143.210  Alternate design or operational considerations.

    (a) Machinery or electrical systems of a novel design, unusual form, 
or special material that cannot be reviewed or approved in accordance 
with this part, may be approved by the Commanding Officer, Marine Safety 
Center. It must be shown by systematic analysis, based on engineering 
principles, that the machinery or electrical equipment or system 
provides an equivalent level of safety. The owner or managing operator 
must submit detailed plans, material component specifications, and 
design criteria, including the expected towing vessel service and 
operating environment, to the Marine Safety Center. Examples of novel 
design include use of liquefied natural gas, compressed natural gas, or 
propane fuel for propulsion, and hybrid, fuel cell, or battery 
propulsion.
    (b) Alternate arrangements or equipment to comply with this part may 
be approved in accordance with Sec.  136.115 of this subchapter.



Sec.  143.215  Existing vessels built to class.

    (a) An existing towing vessel classed by a recognized classification 
society, as appropriate for the intended service and routes, is 
considered in compliance with the machinery and electrical standards of 
this subpart.
    (b) An existing vessel built and equipped to conform to a recognized 
classification society's rules, appropriate for the intended service and 
routes, but not currently classed, may be deemed by the Officer in 
Charge, Marine Inspection (OCMI), or third-party organization (TPO), to 
be in compliance with this part, provided that the towing vessel 
conforms to the class rules.
    (c) Existing vessels meeting either paragraph (a) or (b) of this 
section must also meet the requirements of Sec. Sec.  143.245 and 
143.450.



Sec.  143.220  Machinery space fire prevention.

    (a) All seals and gaskets must be properly maintained to prevent 
leaks of flammable or combustible liquid, as those terms are defined in 
46 CFR subpart 30.10, into the machinery space.
    (b) Piping and machinery components that exceed 220 [deg]C (428 
[deg]F), including fittings, flanges, valves, exhaust manifolds, and 
turbochargers, must be insulated. Measures must be in place to prevent 
flammable or combustible liquid piping leaks from coming into contact 
with these components.
    (c) Flammable and combustible products must not be stored in 
machinery spaces, unless they are stored in a suitable container that 
meets the requirements of Sec.  142.225 of this subchapter.



Sec.  143.225  Control and monitoring requirements.

    (a) Each towing vessel must have a means to monitor and control the 
amount of thrust, rudder angle, and (if applicable) direction of thrust, 
at each operating station.
    (b) Each towing vessel equipped with rudder(s) must have a means to 
monitor and control the position of the rudder(s) at each operating 
station.



Sec.  143.230  Alarms and monitoring.

    (a) Each towing vessel must have a reliable means to provide 
notification when an emergency condition exists or an essential system 
develops problems that require attention. The following alarms must be 
provided:
    (1) Main engine low lubricating oil pressure;
    (2) Main engine high cooling water temperature;
    (3) Auxiliary generator engine low lubricating oil pressure;
    (4) Auxiliary generator engine high cooling water temperature;
    (5) High bilge levels;
    (6) Low hydraulic steering fluid levels, if applicable; and
    (7) Low fuel level, if fitted with a day tank.
    (b) Alarms must:

[[Page 33]]

    (1) Be visible and audible at each operating station. The alarm 
located at the operating station may be a summary alarm; if the alarm at 
the operating station is a summary alarm, the specific alarm condition 
must be indicated at the machinery or bilge location;
    (2) Have a means to test actuation at each operating station or have 
a continuous self-monitoring alarm system which actuates if an alarm 
point fails or becomes disabled;
    (3) Continue until they are acknowledged; and
    (4) Not interfere with night vision at the operating station.
    (c) The following systems must be equipped with gauges at the 
machinery location:
    (1) Main engine lubricating oil pressure and main engine RPM;
    (2) Main engine cooling water temperature;
    (3) Auxiliary generator engine lubricating oil pressure and 
auxiliary generator engine RPM;
    (4) Auxiliary generator engine cooling water temperature; and
    (5) Hydraulic steering fluid pressure, if the vessel is equipped 
with hydraulic steering systems.



Sec.  143.235  General alarms.

    (a) This section does not apply to an excepted vessel as defined in 
Sec.  136.110 of this subchapter.
    (b) Each towing vessel must be fitted with a general alarm that:
    (1) Is activated at each operating station and can notify persons 
onboard in the event of an emergency;
    (2) Is capable of notifying persons in any accommodation, work 
space, and the engine room;
    (3) Has installed, in the engine room and any other area where 
background noise makes a general alarm hard to hear, a supplemental 
flashing red light that is identified with a sign that reads: 
``Attention General Alarm--When Alarm Sounds or Flashes Go to Your 
Station''; and
    (4) A public-address (PA) system or other means of alerting all 
persons on the towing vessel may be used in lieu of the general alarm in 
paragraph (b) of this section if the system meets the requirements of 
paragrahs (b)(2) and (3) of this section.



Sec.  143.240  Communication requirements.

    (a) This section does not apply to an excepted towing vessel as 
defined in Sec.  136.110 of this subchapter.
    (b) Each towing vessel must be fitted with a communication system 
between the pilothouse and the engine room that:
    (1) Consists of either fixed or portable equipment, such as a sound-
powered telephone, portable radios, or other reliable method of voice 
communication, with a main or reserve power supply that is independent 
of the towing vessel's electrical system; and
    (2) Provides two-way voice communication and calling between the 
pilothouse and either the engine room or a location immediately adjacent 
to an exit from the engine room.
    (c) Towing vessels with more than one propulsion unit and 
independent pilothouse control for all engines are not required to have 
internal communication systems.
    (d) When the pilothouse engine controls and the access to the engine 
room are within 3 meters (10 feet) of each other and allow unobstructed 
visible contact between them, direct voice communication is acceptable 
instead of a communication system.



Sec.  143.245  Readiness and testing.

    (a) Essential systems or equipment must be regularly tested and 
examined. Tests and examinations must verify that the system or 
equipment functions as designed. If a component is found unsatisfactory, 
it must be repaired or replaced. Test and examination procedures must be 
in accordance with manufacturer's instructions or the Towing Safety 
Management System (TSMS) applicable to the vessel, if the vessel has a 
TSMS.
    (b) Each towing vessel must perform the applicable tests in Table 
143.245(b) of this section. The tests required by this section must be 
recorded in accordance with part 140 of this subchapter.

[[Page 34]]



             Table 143.245(b)--Required Tests and Frequency
------------------------------------------------------------------------
                 Tests of:                           Frequency:
------------------------------------------------------------------------
Propulsion controls; ahead and astern at    Before the vessel gets
 the operating station.                      underway, but no more than
                                             once in any 24 hour period.
Steering controls at the operating station  Before the vessel gets
                                             underway, but no more than
                                             once in any 24 hour period.
Pilothouse alerter system.................  Weekly.
All alternate steering and propulsion       At least once every 3
 controls.                                   months.
Power supply for alarm actuation circuits   At least once every 3
 for alarms required by Sec.   143.230.      months.
Communications required by Sec.   143.240.  Weekly.
General alarm if the vessel is so equipped  Weekly.
Emergency lighting and power if the vessel  At least once every 3
 is so equipped.                             months.
Charge of storage batteries if the vessel   At least once every 3
 is so equipped, for emergency lighting      months.
 and power.
Alarm setpoints...........................  Twice every 5 years, with no
                                             more than 3 years elapsing
                                             since last test.
Pressure vessel relief valves.............  Twice every 5 years, with no
                                             more than 3 years elapsing
                                             since last test.
All other essential systems...............  At least once every 3
                                             months.
------------------------------------------------------------------------



Sec.  143.250  System isolation and markings.

    Electrical equipment, piping for flammable or combustible liquid, 
seawater cooling, or fire-fighting systems must be provided with 
isolation devices and markings as follows:
    (a) Electrical equipment must be provided with circuit isolation and 
must be marked as described in Sec.  143.400.
    (b) Electrical panels or other enclosures containing more than one 
source of power must be fitted with a sign warning persons of this 
condition and identifying where to secure all sources.
    (c) Piping for flammable or combustible liquid, seawater cooling, or 
firefighting systems must be fitted with isolation valves that are 
clearly marked by labeling or color coding that enables the crew to 
identify its function.
    (d) Any piping system that penetrates the hull below the waterline 
must be fitted with an accessible valve, located as close to the hull 
penetration as is practicable, for preventing the accidental admission 
of water into the vessel either through such pipes or in the event of a 
fracture of such pipe. The valve must be clearly marked by labeling or 
color coding that enables the crew to identify its function.
    (e) Color coding required by this section may be met by complying 
with coding standards contained in the ISO 14726:2008(E) (incorporated 
by reference, see Sec.  136.112 of this subchapter), or in accordance 
with the TSMS applicable to the vessel.



Sec.  143.255  Fuel system requirements.

    (a) Fuel systems for towing vessel main engines and generators must 
have a documented maintenance plan to ensure proper operation of the 
system.
    (b) A continuous supply of clean fuel must be provided to main 
propulsion engines and generators.
    (c) The fuel system must include filters and/or purifiers. Where 
filters are used:
    (1) A supply of spare fuel filters must be provided onboard; and
    (2) Fuel filters must be replaced in accordance with manufacturer's 
requirements or the vessel's TSMS, if applicable.
    (d) Except as otherwise permitted under Sec.  143.210 or Sec.  
143.520, no fuel other than diesel fuel may be used.



Sec.  143.260  Fuel shutoff requirements.

    (a) This section does not apply to an excepted towing vessel as 
defined in Sec.  136.110 of this subchapter.
    (b) To stop the flow of fuel in the event of a fire or break in the 
fuel line, a remote fuel shutoff valve must be fitted on any fuel line 
that supplies fuel directly to a propulsion engine or generator prime 
mover.
    (c) The valve must be installed in the fuel piping directly outside 
of the fuel oil supply tank.
    (d) The valve must be operable from a safe place outside the space 
where the valve is installed.
    (e) Each remote valve control must be marked in clearly legible 
letters, at least 25 millimeters (1 inch) high, indicating the purpose 
of the valve and the way to operate it.



Sec.  143.265  Additional fuel system requirements for towing 
vessels built after January 18, 2000.

    (a) Applicability. This section applies to towing vessels that are 
not excepted

[[Page 35]]

vessels, as defined in Sec.  136.110 of this subchapter, and that were 
built after January 18, 2000. Except for outboard engines or portable 
bilge or fire pumps, each fuel system must comply with this section.
    (b) Portable fuel systems. The vessel must not incorporate or carry 
portable fuel systems, including portable tanks and related fuel lines 
and accessories, except when used for outboard engines or portable bilge 
or fire pumps. The design, construction, and stowage of portable tanks 
and related fuel lines and accessories must comply with the ABYC H-25 
(incorporated by reference, see Sec.  136.112 of this subchapter).
    (c) Vent pipes for integral fuel tanks. Each integral fuel tank must 
have a vent that connects to the highest point of the tank, discharges 
on a weather deck through a bend of 180 degrees, and is fitted with a 
30-by-30-mesh corrosion-resistant flame screen. Vents from two or more 
fuel tanks may combine in a system that discharges on a weather deck. 
The net cross-sectional area of the vent pipe for the tank must be not 
less than 312.3 square millimeters (0.484 square inches), for any tank 
filled by gravity. The cross-sectional area of the vent pipe, or the sum 
of the vent areas when multiple vents are used, must not be less than 
that of the fill pipe cross-sectional area for any tank filled by pump 
pressure.
    (d) Fuel piping. Except as permitted in paragraphs (d)(1) through 
(3) of this section, each fuel line must be seamless and made of steel, 
annealed copper, nickel-copper, or copper-nickel. Each fuel line must 
have a wall thickness no less than 0.9 millimeters (0.035 inches) except 
for the following:
    (1) Aluminum piping is acceptable on an aluminum-hull towing vessel 
if it is at least Schedule 80 in thickness.
    (2) Nonmetallic flexible hose is acceptable if it:
    (i) Is used in lengths of not more than 0.76 meters (30 inches);
    (ii) Is visible and easily accessible;
    (iii) Does not penetrate a watertight bulkhead;
    (iv) Is fabricated with an inner tube and a cover of synthetic 
rubber or other suitable material reinforced with wire braid; and
    (v) Either:
    (A) If designed for use with compression fittings, is fitted with 
suitable, corrosion-resistant, compression fittings, or fittings 
compliant with the SAE J1475 Revised JUN96 (incorporated by reference, 
see Sec.  136.112 of this subchapter); or
    (B) If designed for use with clamps, is installed with two clamps at 
each end of the hose. Clamps must not rely on spring tension and must be 
installed beyond the bead or flare or over the serrations of the mating 
spud, pipe, or hose fitting.
    (3) Nonmetallic flexible hose complying with SAE J1942 Revised 
APR2007 (incorporated by reference, see Sec.  136.112 of this 
subchapter), is also acceptable.
    (e) Alternative standards. A towing vessel of less than 79 feet in 
length may comply with any of the following standards for fuel systems 
instead of those of paragraph (d) in this section:
    (1) ABYC H-33 (incorporated by reference, see Sec.  136.112 of this 
subchapter);
    (2) Chapter 5 of NFPA 302 (incorporated by reference, see Sec.  
136.112 of this subchapter); or
    (3) 33 CFR chapter I, subchapter S (Boating Safety).



Sec.  143.270  Piping systems and tanks.

    Piping and tanks exposed to the outside of the hull must be made of 
metal and maintained in a leak free condition.



Sec.  143.275  Bilge pumps or other dewatering capability.

    There must be an installed or portable bilge pump for emergency 
dewatering. Any portable pump must have sufficient hose length and 
pumping capability. All installed bilge piping must have a check/foot 
valve in each bilge suction that prevents unintended backflooding 
through bilge piping.



Sec.  143.300  Pressure vessels.

    (a) Pressure vessels over 5 cubic feet in volume and over 15 pounds 
per square inch maximum allowable working pressure (MAWP) must be 
equipped with an indicating pressure gauge (in a readily visible 
location) and with one or more spring-loaded relief valves. The total 
relieving capacity of such relief valves must prevent pressure from

[[Page 36]]

exceeding the MAWP, as established by the manufacturer, by more than 10 
percent.
    (b) Pressure vessels must be externally examined annually. Relief 
valves must be tested in accordance with Sec.  143.245.
    (c) All pressure vessels must have the MAWP indicated by a stamp, 
nameplate, or other means visible to the crew.
    (d) Pressure vessels installed after July 20, 2018, or the date the 
vessel obtains a Certificate of Inspection (COI), whichever date is 
earlier, must meet the requirements of Sec.  143.545.

[USCG-2006-24412, 81 FR 40101, June 20, 2016; 81 FR 47312, July 21, 
2016]



Sec.  143.400  Electrical systems, general.

    (a) Electrical systems and equipment must function properly and 
minimize system failures and fire and shock hazards.
    (b) Installed electrical power source(s) must be capable of carrying 
the electrical load of the towing vessel under normal operating 
conditions.
    (c) Electrical equipment must be marked with its respective current 
and voltage ratings.
    (d) Individual circuit breakers on switchboards and distribution 
panels must be labeled with a description of the loads they serve.
    (e) Electrical connections must be suitably installed to prevent 
them from coming loose through vibration or accidental contact.
    (f) Electrical equipment and electrical cables must be suitably 
protected from wet and corrosive environments.
    (g) Electrical components that pose an electrical hazard must be in 
an enclosure.
    (h) Electrical conductors passing though watertight bulkheads must 
be installed so that the bulkhead remains watertight.
    (i) The connections of flexible cable plugs and socket outlets must 
be designed to prevent unintended separation.



Sec.  143.410  Shipboard lighting.

    (a) Sufficient lighting suitable for the marine environment must be 
provided within crew working and living areas.
    (b) Emergency lighting must be provided for all internal crew 
working and living areas. Emergency lighting sources must provide for 
sufficient illumination under emergency conditions to facilitate egress 
from each space and must be either:
    (1) Automatic, battery-operated with a duration of no less than 2 
hours; or
    (2) Non-electric, phosphorescent adhesive lighting strips that are 
installed along escape routes and sufficiently visible to enable egress 
with no power.
    (c) Each towing vessel must be equipped with at least two portable, 
battery-powered lights. One must be located in the pilothouse and the 
other at the access to the engine room.



Sec.  143.415  Navigation lights.

    (a) Towing vessels more than 65 feet in length must use navigation 
lights that meet UL 1104 (incorporated by reference, see Sec.  136.112 
of this subchapter) or other standards accepted by the Coast Guard.
    (b) Towing vessels 65 feet or less in length may meet the 
requirements listed in 33 CFR 183.810 or paragraph (a) of this section.



Sec.  143.450  Pilothouse alerter system.

    (a) Except as provided in paragraph (d) or (e) of this section, a 
towing vessel with overnight accommodations and alternating watches 
(shift work), when pulling, pushing or hauling alongside one or more 
barges, must have a system to detect when its master or mate (pilot) 
becomes incapacitated. The system must:
    (1) Have an alarm in the pilothouse distinct from any other alarm;
    (2) Require action from the master or officer in charge of a 
navigational watch, during an interval not to exceed 10 minutes, in 
order to reset the alarm timer; and
    (3) Immediately (within 30 seconds) notify another crewmember if the 
pilothouse alarm is not acknowledged.
    (b) The time interval for the system alarm must be adjustable. The 
time may be adjusted by the owner or managing operator but must not be 
in excess of 10 minutes. This time interval, and information on alerter 
operation,

[[Page 37]]

must be provided on board and specified in the vessel's TSMS if 
applicable.
    (c) The system alarm may be reset physically (e.g. a push button), 
or the reset may be accomplished by a link to other pilothouse action 
such as rudder or throttle control movement, or motion detection of 
personnel.
    (d) A towing vessel need not comply with this section if a second 
person is provided in the pilothouse.
    (e) Towing vessels 65 feet or less in length are not required to 
have a pilothouse alerter system.



Sec.  143.460  Towing machinery.

    (a) Towing machinery such as capstans, winches, and other mechanical 
devices used to connect the towing vessel to the tow must be designed 
and installed to maximize control of the tow.
    (b) Towing machinery for towing astern must have sufficient 
safeguards, e.g., towing bitt with crossbar, to prevent the machinery 
from becoming disabled in the event the tow becomes out of line.
    (c) Towing machinery used to connect the towing vessel to the tow 
must be suitable for its intended service. It must be capable of 
withstanding exposure to the marine environment, likely mechanical 
damage, static and dynamic loads expected during intended service, the 
towing vessel's horsepower, and arrangement of the tow.
    (d) When a winch that has the potential for uncontrolled release 
under tension is used, a warning must be in place at the winch controls 
that indicates this. When safeguards designed to prevent uncontrolled 
release are utilized, they must not be disabled.
    (e) Each owner or managing operator must develop procedures to 
routinely examine, maintain, and replace capstans, winches, and other 
machinery used to connect the towing vessel to the tow.



              Subpart C_Requirements for New Towing Vessels



Sec.  143.500  Applicability.

    (a) This subpart applies to a new towing vessel, as defined in Sec.  
136.110 of this subchapter, unless it is an excepted vessel.
    (b) Machinery or electrical systems of a novel design, unusual form, 
or special material must meet section Sec.  143.210.
    (c) Unless otherwise noted in Sec. Sec.  143.515 and 143.520, new 
towing vessels must also meet the requirements of subpart B of this 
part.



Sec.  143.510  Verification of compliance with design standards.

    Verification of compliance with the machinery and electrical design 
standards in this subpart is obtained by following the provisions in 
Sec. Sec.  144.135 through 144.145 of this subchapter.



Sec.  143.515  Towing vessels built to recognized classification 
society rules.

    (a) Except as noted in paragraph (c) of this section, a towing 
vessel classed by the American Bureau of Shipping (ABS), in accordance 
with the ABS Rules for Building and Classing Steel Vessels Under 90 
Meters (295 Feet) in Length, or the ABS Rules for Building and Classing 
Steel Vessels for Service on Rivers and Intracoastal Waterways 
(incorporated by reference, see Sec.  136.112 of this subchapter), as 
appropriate for the intended service and routes, complies with this 
subpart.
    (b) Except as noted in paragraph (c) of this section, a towing 
vessel built and equipped to conform to the ABS rules specified in 
paragraph (a) of this section and appropriate for the intended service 
and routes, but not currently classed, may be deemed by the OCMI or a 
TPO to be in compliance with this subpart if it can be shown that the 
vessel continues to conform to the ABS rules.
    (c) A vessel that complies with this subpart as described in 
paragraph (a) or (b) must also meet the requirements described in 
Sec. Sec.  143.585 through 143.595 or the requirements of Sec.  143.600 
if it moves tank barges carrying oil or hazardous material in bulk.
    (d) Vessels meeting either paragraph (a) or (b) of this section are 
considered as being in compliance with subpart B of this part except for 
the readiness and testing requirements of Sec.  143.245, and pilothouse 
alerter requirements of Sec.  143.450.

[[Page 38]]

    (e) Towing vessels built to other recognized classification society 
rules, appropriate for the intended route and service, may be considered 
compliant with provisions in this subpart upon approval by the Coast 
Guard.



Sec.  143.520  Towing vessels built to American Boat and Yacht
Council standards.

    (a) Except as noted in paragraphs (b) and (c) of this section, a new 
towing vessel 65 feet (19.8 meters) or less in length built to conform 
with the American Boat and Yacht Council (ABYC) standards listed in this 
paragraph (a) (incorporated by reference, see Sec.  136.112 of this 
subchapter), complies with this subpart:
    (1) E-11 (2003)--AC & DC Electrical Systems on Boats;
    (2) H-2 (2002)--Ventilation of Boats Using Gasoline;
    (2) H-22 (2005)--Electric Bilge Pump Systems;
    (3) H-24 (2007)--Gasoline Fuel Systems;
    (4) H-25 (2003)--Portable Gasoline Fuel Systems;
    (5) H-32 (2004)--Ventilation of Boats Using Diesel Fuel;
    (6) H-33 (2005)--Diesel Fuel Systems;
    (7) P-1 (2002)--Installation of Exhaust Systems for Propulsion and 
Auxiliary Engines; and
    (8) P-4 (2004)--Marine Inboard Engines and Transmissions.
    (b) New towing vessels, 65 feet or less in length, built to the ABYC 
standards specified in this section are considered compliant with 
subpart B of this part except for the readiness and testing requirements 
of Sec.  143.245.
    (c) If the vessel moves tank barges carrying oil or hazardous 
material in bulk, it must meet either the requirements described in 
Sec. Sec.  143.585 through 143.595 or the requirements described in 
Sec.  143.600.



Sec.  143.540  Pumps, pipes, valves, and fittings for essential systems.

    (a) Pumps, pipes, valves, and fittings in essential systems on 
vessels must meet ABS Rules for Building and Classing Steel Vessels 
Under 90 Meters (295 Feet) in Length (incorporated by reference, see 
Sec.  136.112 of this subchapter), Part 4, Chapter 4.
    (b) Pumps, pipes, valves, and fittings in essential systems on 
towing vessels operating exclusively on rivers or intracoastal waterways 
may meet ABS Rules for Building and Classing Steel Vessels for Service 
on Rivers and Intracoastal Waterways (incorporated by reference, see 
Sec.  136.112 of this subchapter), Part 4, Chapter 3.



Sec.  143.545  Pressure vessels.

    (a) In lieu of meeting the requirements of Sec.  143.300, pressure 
vessels installed on new towing vessels must meet the requirements of 
this section.
    (b) Pressure vessels over 5 cubic feet in volume and more than 15 
psi maximum allowable working pressure must meet ABS Rules for Building 
and Classing Steel Vessels under 90 Meters (295 Feet) in Length 
(incorporated by reference, see Sec.  136.112 of this subchapter), Part 
4, Chapter 1, Section 1.



Sec.  143.550  Steering systems.

    (a) Steering systems must meet ABS Rules for Building and Classing 
Steel Vessels under 90 Meters (295 Feet) in Length (incorporated by 
reference, see Sec.  136.112 of this subchapter), Part 4, Chapter 3, 
Section 3.
    (b) Steering systems on new towing vessels operating exclusively on 
rivers or intracoastal waterways may meet ABS Rules for Building and 
Classing Steel Vessels for Service on Rivers and Intracoastal Waterways 
(incorporated by reference, see Sec.  136.112 of this subchapter), Part 
4, Chapter 2, Section 3.



Sec.  143.555  Electrical power sources, generators, and motors.

    (a) General requirements. (1) There must be a source of electrical 
power sufficient for:
    (i) All essential systems as defined by Sec.  136.110 of this 
subchapter;
    (ii) Minimum conditions of habitability; and
    (iii) Other installed or portable systems and equipment.
    (2) Generators and motors must be suitably rated for the environment 
where they operate, marked with their respective ratings, and suitably 
protected against overcurrent.
    (3) A towing vessel, other than an excepted vessel, must have a 
backup or a second power source that has adequate

[[Page 39]]

capacity to supply power to essential alarms, lighting, radios, 
navigation equipment, and any other essential system identified by the 
cognizant OCMI or a TPO.
    (b) Specific requirements. (1) The owner or managing operator must 
complete a load analysis that shows that the electrical power source is 
sufficient to power the sum of connected loads described in paragraph 
(a)(1) of this section utilizing an appropriate load factor for each 
load. A record of the analysis must be retained by the owner or managing 
operator.
    (2) Installed generators and motors must have a data plate listing 
rated kilowatts and power factor (or current), voltage, and rated 
ambient temperature.
    (3) Generators must be provided with overcurrent protection no 
greater than 115 percent of their rated current and utilize a 
switchboard or distribution panel.
    (4) Motors must be provided with overcurrent protection that meets 
Parts I through VII, Article 430 of NFPA's National Electrical Code 
(NEC) (incorporated by reference, see Sec.  136.112 of this subchapter). 
Steering motor circuits must be protected as per Part 4 Chapter 6 
Section 2, Regulation 11 (except 11.7) ofABS Rules for Building and 
Classing Steel Vessels Under 90 Meters (295 feet) in Length 
(incorporated by reference, see Sec.  136.112 of this subchapter).
    (5) Generators and motors installed in machinery spaces must be 
certified to operate in an ambient temperature of 50 [deg]C or be 
derated, or it can be shown that 40 [deg]C ambient temperature will not 
be exceeded in these spaces.
    (6) Each generator and motor, except a submersible-pump motor, must 
be in an accessible space which is adequately ventilated and as dry as 
practicable, and must be mounted above the bilges.
    (7) A generator driven by a main propulsion unit (such as a shaft 
generator) may be considered one of the power sources required by 
paragraph (a) of this section.
    (8) Other than excepted vessels, each towing vessel must be arranged 
so that the following essential loads can be energized from two 
independent sources of electricity:
    (i) High bilge level alarm required by Sec.  143.230;
    (ii) Emergency egress lighting, unless the requirements of Sec.  
143.410(b)(1) or (2) are met;
    (iii) Navigation lights;
    (iv) Pilothouse lighting;
    (v) Engine room lighting;
    (vi) Any installed radios and navigation equipment as required by 
Sec. Sec.  140.715 and 140.725;
    (vii) All distress alerting communications equipment listed in 
Sec. Sec.  140.715 and 140.725;
    (viii) Any installed fire detection system; and
    (ix) Any essential system identified by the cognizant OCMI or TPO, 
if applicable.
    (9) If a battery is used as the second source of electricity 
required by paragraph (b)(8) of this section, it must be capable of 
supplying the loads for at least three hours. There must be a means to 
monitor the condition of the battery backup power source.



Sec.  143.560  Electrical distribution panels and switchboards.

    (a) Each distribution panel or switchboard on a towing vessel must 
be:
    (1) In a location that is accessible, as dry as practicable, 
adequately ventilated, and protected from falling debris and dripping or 
splashing water; and
    (2) Totally enclosed and of the dead-front type.
    (b) Each switchboard accessible from the rear must be constructed to 
prevent a person's accidental contact with energized parts.
    (c) Nonconductive mats or grating must be provided on the deck in 
front of each switchboard and, if it is accessible from the rear, on the 
deck behind the switchboard.
    (d) Each un-insulated current-carrying part must be mounted on 
noncombustible, nonabsorbent, and high-dielectric insulating material.
    (e) Equipment mounted on a door of an enclosure must be constructed 
or shielded so that a person will not come into accidental contact with 
energized parts.

[[Page 40]]



Sec.  143.565  Electrical overcurrent protection other than generators
and motors.

    (a) General requirement. Power and lighting circuits on towing 
vessels must be protected by suitable overcurrent protection.
    (b) Specific requirements. (1) Cable and wiring used in power and 
lighting circuits must have overcurrent protection that opens the 
circuit at the standard setting closest to 80 percent of the 
manufacturer's listed ampacity. Overcurrent protection setting 
exceptions allowed by NFPA's National Electrical Code (NEC), Article 240 
(incorporated by reference, see Sec.  136.112 of this subchapter) may be 
employed.
    (2) If the manufacturer's listed ampacity is not known, tables 
referenced in Article 310.15(B) of the NEC (incorporated by reference, 
see Sec.  136.112 of this subchapter) must be used, assuming a 
temperature rating of 75 [deg]C and an assumed temperature of 50 [deg]C 
for machinery spaces and 40 [deg]C for other spaces.
    (3) Overcurrent protection devices must be installed in a manner 
that will not open the path to ground in a circuit; only ungrounded 
conductors must be protected. Overcurrent protection must be coordinated 
such that an overcurrent situation is cleared by the circuit breaker or 
fuse nearest to the fault.
    (4) Each transformer must have protection against overcurrent that 
meets Article 450 of the NEC (incorporated by reference, see Sec.  
136.112 of this subchapter).
    (5) On a towing vessel, other than an excepted vessel as defined in 
Sec.  136.110 of this subchapter, essential systems and non-essential 
systems must not be on the same circuit or share the same overcurrent 
protective device.



Sec.  143.570  Electrical grounding and ground detection.

    (a) An ungrounded distribution system must be provided with a ground 
detection system located at the main switchboard or distribution panel 
that provides continuous indication of circuit status to ground, with a 
provision to temporarily remove the indicating device from the reference 
ground.
    (b) A dual voltage or grounded electrical distribution system must 
have the neutral suitably grounded. There must be only one connection to 
ground, regardless of the number of power sources. This connection must 
be at the main switchboard or distribution panel.
    (c) On a metallic towing vessel, a grounded distribution system must 
be grounded to the hull. This grounded system must be connected to a 
common, non-aluminum ground plate. The ground plate must have only one 
connection to the main switchboard or distribution panel, and the 
connection must be readily accessible for examination.
    (d) On a nonmetallic towing vessel, all electrical equipment must be 
grounded to a common ground. Multiple ground plates bonded together are 
acceptable.
    (e) Each grounding conductor of a cable must be identified by one of 
the following means:
    (1) Green braid or green insulation; or
    (2) Stripping the insulation from the entire exposed length of the 
grounding conductor.
    (f) A towing vessel's hull may not carry current as a conductor, 
except for an impressed-current cathodic-protection system or a battery 
system used to start an engine.
    (g) Cable armor may not be used to ground electrical equipment or 
systems.
    (h) Each receptacle outlet and attachment plug for a portable lamp, 
tool, or similar apparatus operating at 100 or more volts must have a 
grounding pole and a grounding conductor in the portable cord.
    (i) In a grounded distribution system, only grounded, three-prong 
appliances may be used. This does not apply to double-insulated 
appliances or tools and appliances of 50 volts or less.



Sec.  143.575  Electrical conductors, connections, and equipment.

    (a) Each cable and wire on a towing vessel must be installed to meet 
the following requirements:
    (1) Each conductor must have sufficient current-carrying capacity 
for the circuit in which it is used.

[[Page 41]]

    (2) Cable hangers for overhead and vertical cable runs must be 
installed with metal supports and retention devices at least every 48 
inches.
    (3) Each wire and cable run must be installed in a manner to prevent 
contact with personnel, mechanical hazards, and leaking fluids. Wire and 
cable runs must not be installed in bilges, across a normal walking 
path, or less than 24 inches from the path of movable machinery (e.g., 
cranes, elevators, forktrucks, etc., where the machinery location can 
change) unless adequately protected.
    (4) Connections and terminations must be suitable for the installed 
conductors, and must retain the original electrical, mechanical, flame-
retarding, and where necessary, fire-resisting properties of the 
conductor. If twist-on types of connectors are used, the connections 
must be made within an enclosure and the insulated cap of the connector 
must be secured to prevent loosening due to vibration. Twist-on type of 
connectors may not be used for making joints in cables, facilitating a 
conductor splice, or extending the length of a circuit.
    (5) Each cable and wire must be installed so as to avoid or reduce 
interference with radio reception and compass indication.
    (6) Each cable and wire must be protected from the weather.
    (7) Each cable and wire must be supported in order to avoid chafing 
or other damage.
    (8) Each cable and wire must be protected by metal coverings or 
other suitable means, if in areas subject to mechanical abuse.
    (9) Each cable and wire must be suitable for low temperature and 
high humidity, if installed in refrigerated compartments.
    (10) Each cable and wire must be located outside a tank, unless it 
supplies power to equipment in the tank.
    (11) If wire is installed in a tank, it must have sheathing or wire 
insulation compatible with the fluid in a tank.
    (b) Extension cords must not be used as a permanent connection to a 
source of electrical power.
    (c) Multi-outlet adapters (power strips) may not be connected to 
other adapters (``daisy-chained''), or otherwise used in a manner that 
could overload the capacity of a receptacle.



Sec.  143.580  Alternative electrical installations.

    In lieu of meeting the requirements of Sec. Sec.  143.555 through 
143.575, a vessel may meet the following:
    (a) ABS Rules for Building and Classing Steel Vessels Under 90 
Meters (295 Feet) in Length (incorporated by reference, see Sec.  
136.112 of this subchapter), Part 4, Chapter 6; or
    (b) ABS Rules for Building and Classing Steel Vessels for Service on 
Rivers and Intracoastal Waterways (incorporated by reference, see Sec.  
136.112 of this subchapter), Part 4, Chapter 5, if they operate 
exclusively on rivers or intracoastal waterways.



Sec.  143.585  General requirements for propulsion, steering, and 
related controls on vessels that move tank barges carrying oil or
hazardous material in bulk.

    (a) There must be an alternate means to control the propulsion and 
steering system which must:
    (1) Be independent of the primary control required by Sec.  143.225;
    (2) Be located at or near the propulsion and steering equipment; and
    (3) Be readily accessible and suitable for prolonged operation.
    (b) There must be a means to communicate between each operating 
station and the alternate propulsion and steering controls.
    (c) There must be a means to stop each propulsion engine and 
steering motor from each operating station.
    (d) The means to monitor the amount of thrust, rudder angle, and if 
applicable, direction (ahead or astern) of thrust must be independent of 
the controls required by Sec.  143.225.
    (e) The propulsion control system required by Sec.  143.225 must be 
designed so that, in the event of a single failure of any component of 
the system, propeller speed and direction of thrust are maintained or 
reduced to zero.
    (f) On a towing vessel with an integrated steering and propulsion 
system, such as a Z-drive, the control system required by Sec.  143.225 
must be designed so that, in the event of a single failure of any 
component of the system, propeller speed and direction of thrust are

[[Page 42]]

maintained or the propeller speed is reduced to zero.
    (g) An audible and visual alarm must actuate at each operating 
station when:
    (1) The propulsion control system fails;
    (2) A non-follow up steering control system fails, if installed; and
    (3) The ordered rudder angle does not match the actual rudder 
position on a follow-up steering control system, if installed. This 
alarm must have an appropriate delay and error tolerance to eliminate 
nuisance alarms.
    (h) Alarms must be separate and independent of the control system 
required by Sec.  143.225.
    (i) A means of communication must be provided between each operating 
station and any crewmember(s) required to respond to alarms.
    (j) The two sources of electricity required by Sec.  143.555(a)(3) 
and (b)(8) must be capable of powering electrical loads needed to 
maintain propulsion, steering, and related controls for not less than 3 
hours.
    (k) The second source of supply required by Sec.  143.555(a)(3) must 
automatically start to help restore or maintain power to propulsion, 
steering, and related controls when the main power source fails.
    (l) Propulsion, steering, or related controls that are directly 
reliant on stored energy, such as compressed air, battery power, or 
hydraulic pressure, must have two independent stored energy systems, 
such as compressed air cylinders, battery banks, or hydraulic cylinders, 
that are capable of maintaining the vessel's propulsion, steering, and 
related controls.
    (m) After a power failure, electrical motors used to maintain 
propulsion and steering must automatically restart when power is 
restored, unless remote control starting is provided at the operating 
station.



Sec.  143.590  Propulsor redundancy on vessels that move tank barges
carrying oil or hazardous material in bulk.

    (a) A towing vessel must be provided with at least two independent 
propulsors unless the requirements of Sec.  143.595 are met.
    (b) There must be independent controls for each propulsor at each 
operating station.
    (c) In the event of a failure of a single propulsor, the remaining 
propulsor(s) must have sufficient power to maneuver the vessel to a safe 
location.



Sec.  143.595  Vessels with one propulsor that move tank barges
carrying oil or hazardous material in bulk.

    (a) A towing vessel must have independent, duplicate vital 
auxiliaries. For the purpose of this section, vital auxiliaries are the 
equipment necessary to operate the propulsion engine, and include fuel 
pumps, lubricating oil pumps, and cooling water pumps. In the event of a 
failure or malfunction of any single vital auxiliary, the propulsion 
engine must continue to provide propulsion adequate to maintain control 
of the tow.
    (b) In the event of a failure, the corresponding independent 
duplicate vital auxiliary, described in paragraph (a) of this section, 
must be fully capable of assuming the operation of the failed unit.



Sec.  143.600  Alternative standards for vessels that move tank barges
carrying oil or hazardous material in bulk.

    In lieu of meeting Sec. Sec.  143.585 through 143.595, a towing 
vessel may comply with Sections 7-5 (class ABCU) and 3-5 (class R2) of 
Part 4 of the ABS Rules for Building and Classing Steel Vessels Under 90 
Meters (295 Feet) in Length (incorporated by reference, see Sec.  
136.112 of this subchapter), except that a vessel that operates 
exclusively on rivers or intracoastal waterways does not need to comply 
with 4-7-4/3.9 and the automatic day tank fill pump requirement of 4-7-
4/25.3.



Sec.  143.605  Demonstration of compliance on vessels that move tank
barges carrying oil or hazardous material in bulk.

    (a) The owner or managing operator of each towing vessel must devise 
test procedures that demonstrate compliance with the design and 
engineering requirements prescribed in this subpart.

[[Page 43]]

    (b) The tests required in paragraph (a) of this section must be 
satisfactorily conducted and witnessed by the cognizant OCMI or a TPO. A 
record of the tests must be retained by the owner or managing operator 
and be available upon request of the cognizant OCMI or TPO.



PART 144_CONSTRUCTION AND ARRANGEMENT--Table of Contents



                            Subpart A_General

Sec.
144.100 Purpose.
144.105 Applicability and delayed implementation.
144.120 A classed vessel.
144.125 A vessel with a load line.
144.130 A vessel built to the International Convention for the Safety of 
          Life at Sea, 1974, as amended, requirements.
144.135 Verification of compliance with design standards.
144.140 Qualifications.
144.145 Procedures for verification of compliance with design standards.
144.155 Verification of compliance with design standards for a sister 
          vessel.
144.160 Marking.

                           Subpart B_Structure

144.200 Structural standards for an existing vessel.
144.205 Structural standards for a new vessel.
144.215 Special consideration.

              Subpart C_Stability and Watertight Integrity

144.300 Stability standards for an existing vessel.
144.305 Stability standards for a new vessel.
144.310 Lifting requirements for a new vessel.
144.315 Weight and moment history requirements for a vessel with 
          approved lightweight characteristics.
144.320 Watertight or weathertight integrity.
144.330 Review of a vessel's watertight and weathertight integrity.

                        Subpart D_Fire Protection

144.400 Applicability.
144.405 Fire hazards to be minimized.
144.410 Separation of machinery and fuel tank spaces from accommodation 
          spaces.
144.415 Combustibles insulated from heated surfaces.
144.425 Waste receptacles.
144.430 Mattresses.

                       Subpart E_Emergency Escape

144.500 Means of escape.
144.505 Location of escapes.
144.510 Window as a means of escape.
144.515 One means of escape required.

                          Subpart F_Ventilation

144.600 Ventilation for accommodations.
144.605 Means to stop fans and close openings.
144.610 Ventilation in a vessel more than 65 feet in length.

                          Subpart G_Crew Spaces

144.700 General requirements.
144.710 Overnight accommodations.
144.720 Crew rest consideration.

                       Subpart H_Rails and Guards

144.800 Handrails and bulwarks.
144.810 Storm rails.
144.820 Guards in dangerous places.
144.830 Protection against hot piping.

                          Subpart I_Visibility

144.905 Operating station visibility.
144.920 Window or portlight strength in a new vessel.

    Authority: 46 U.S.C. 3103, 3301, 3306, 3308, 3316, 8104, 8904; 33 
CFR 1.05; DHS Delegation No. 0170.1.

    Source: USCG-2006-24412, 81 FR 40101, June 20, 2016, unless 
otherwise noted.



                            Subpart A_General



Sec.  144.100  Purpose.

    This part details the requirements for design, construction and 
arrangement, and verification of compliance with this part, including 
document review.



Sec.  144.105  Applicability and delayed implementation.

    This part applies to each towing vessel subject to this subchapter. 
Note that Sec. Sec.  144.200 and 144.300 only apply to an existing 
vessel and that the following sections only apply to a new vessel: 
Sec. Sec.  144.205, 144.305, 144.310, 144.405, 144.410, 144.420, 
144.425, 144.430, 144.910, and 144.920.
    (a) An existing towing vessel must comply with Sec.  144.320 
starting July 20, 2016 and it must comply with the other applicable 
requirements in this part no later than either July 20, 2018 or the

[[Page 44]]

date the vessel obtains a Certificate of Inspection (COI), whichever 
date is earlier.
    (b) The delayed implementation provisions in paragraph (a) of this 
section do not apply to a new towing vessel.
    (c) Alterations or modifications made to the structure or 
arrangements of an existing vessel that are a major conversion, made on 
or after the July 20, 2017, must comply with the regulations applied to 
a new towing vessel of this part insofar as is reasonable and 
practicable. Repairs conducted on an existing vessel, resulting in no 
significant changes to the original structure or arrangement of the 
vessel, must comply with the standards applicable to the vessel at the 
time of construction or, as an alternative, with the regulations in this 
part.

[USCG-2006-24412, 81 FR 40101, June 20, 2016; 81 FR 47312, July 21, 
2016]



Sec.  144.120  A classed vessel.

    A vessel currently classed by a recognized classification society is 
deemed to be in compliance with the requirements of subparts B and C of 
this part.



Sec.  144.125  A vessel with a load line.

    A vessel with a valid load line certificate issued in accordance 
with subchapter E of this chapter may be deemed in compliance with the 
requirements of subparts B and C of this part.



Sec.  144.130  A vessel built to the International Convention for
the Safety of Life at Sea, 1974, as amended, requirements.

    A vessel built to the International Convention for the Safety of 
Life at Sea, 1974, as amended, is considered to be in compliance with 
this part.



Sec.  144.135  Verification of compliance with design standards.

    Verification of compliance with the construction and arrangement 
design standards of this part must be performed according to the 
following table:

     Table 144.135--Verification of Compliance With Design Standards
------------------------------------------------------------------------
                                                 Then the applicable
            If the vessel is--               requirements must be met--
------------------------------------------------------------------------
(a) A new vessel,.........................  Before the COI is issued.
(b) A vessel to undergo a major conversion  Before the major conversion
 or alteration to the hull, machinery, or    or alteration is performed.
 equipment that may affect the vessel's
 safety,
(c) A vessel on which a new installation    Before the new installation
 that is not a ``replacement in kind'',      is performed.
------------------------------------------------------------------------


[USCG-2006-24412, 81 FR 40101, June 20, 2016; 81 FR 47312, July 21, 
2016]



Sec.  144.140  Qualifications.

    Use the following table to determine the individual or entity that 
may conduct a verification of compliance with design standards required 
by Sec.  144.135.

                              Table 144.140
------------------------------------------------------------------------
  Verification of compliance with design
      standards may be performed by--              Provided that--
------------------------------------------------------------------------
(a) A registered professional engineer      The PE ensures he or she
 (P.E.) licensed by one of the states of     does not exceed the scope
 the United States or the District of        of his or her P.E. license.
 Columbia;
(b) An authorized classification society    The authorized
 that has been delegated the authority to    classification society
 issue the SOLAS Cargo Ship Safety           ensures that the employees
 Construction Certificate under 46 CFR       that perform the
 8.320;                                      verification of compliance
                                             holds proper qualifications
                                             for the type of
                                             verification performed.
(c) The Coast Guard.......................  ............................
------------------------------------------------------------------------



Sec.  144.145  Procedures for verification of compliance with design
standards.

    (a) Verification of compliance with design standards, when required 
by Sec.  144.135, must be performed by an individual or entity who meets 
the requirements of Sec.  144.140.
    (b) Verification of compliance with design standards must be based 
on objective evidence of compliance with the applicable requirements and 
include:
    (1) A description of the vessel's intended service and route;
    (2) The standards used for the vessel's design and construction;
    (3) Deviations from the standards used, if any;

[[Page 45]]

    (4) A statement that the vessel is suitable for the intended service 
and route; and
    (5) The identification of the individual or entity in Table 144.140 
of Sec.  144.140 who conducted the verification of compliance.
    (c) Verification of compliance with design standards must include 
review and analyses of sufficient plans, drawings, schematics, 
calculations, and other documents to ensure the vessel complies with the 
standards used. The plans must be stamped with the seal authorized for 
use by the individual or entity performing the verification of 
compliance, or otherwise indicate that they have been reviewed and 
determined to meet the applicable standards by an individual or entity 
who meets the requirements of Sec.  144.140.
    (d) A copy of the verified plan must be provided to the cognizant 
Officer in Charge, Marine Inspection (OCMI) and the third-party 
organization (TPO) conducting the surveys, if applicable, except as 
provided in paragraph (e) of this section.
    (e) Plans verified by an authorized classification society need only 
be provided to the Coast Guard upon request.
    (f) If the vessel is a new vessel, a copy of the verified plan must 
be available at the construction site.
    (g) As referred to in this section, the term plan may include, but 
is not limited to drawings, documents, or diagrams of the following:
    (1) Outboard profile.
    (2) Inboard profile.
    (3) Arrangement of decks.
    (4) Midship section and scantling plans.
    (5) Survival craft embarkation stations.
    (6) Machinery installation, including, but not limited to:
    (i) Propulsion and propulsion control, including shaft details;
    (ii) Steering and steering control, including rudder details;
    (iii) Ventilation diagrams;
    (iv) Fuel transfer and service system, including tanks;
    (v) Piping systems including: bilge, ballast, hydraulic, combustible 
and flammable liquids, vents, and overflows; and
    (vi) Hull penetrations and shell connections;
    (7) Electrical installation including, but not limited to:
    (i) Elementary one-line diagram of the power system;
    (ii) Cable lists;
    (iii) Type and size of generators and prime movers;
    (iv) Type and size of generator cables, bus-tie cables, feeders, and 
branch circuit cables;
    (v) Power and lighting panelboards with number of circuits and 
rating of energy consuming devices;
    (vi) Capacity of storage batteries;
    (vii) Rating of circuit breakers and switches, interrupting capacity 
of circuit breakers, and rating and setting of overcurrent devices; and
    (viii) Electrical plant load analysis as required by Sec.  143.555 
of this subchapter.
    (8) Lifesaving equipment locations and installation;
    (9) Fire protection equipment installation including, but not 
limited to:
    (i) Fire main system plans and calculations;
    (ii) Fixed gas fire extinguishing system plans and calculations;
    (iii) Fire detecting system and smoke detecting system plans;
    (iv) Sprinkler system diagram and calculations; and
    (v) Portable fire extinguisher types, sizes, and locations;
    (10) Lines and offsets, curves of form, cross curves of stability, 
tank capacities including size and location on vessel, and other 
stability documents needed to show compliance; and
    (11) Towing arrangements.



Sec.  144.155  Verification of compliance with design standards for
a sister vessel.

    (a) Verification of compliance required by Sec.  144.135 is not 
required for a sister vessel, provided that:
    (1) The original vessel has been verified as complying with this 
part;
    (2) The owner authorizes the use of the plans for the original 
vessels for the new construction of the sister vessel;
    (3) The standards used in the design and construction of the 
original vessel have not changed since the original verification of 
compliance;

[[Page 46]]

    (4) The sister vessel is built to the same verified plans, drawings, 
schematics, calculations, and other documents and equipped with 
machinery of the same make and model as the original vessel, and has not 
been subsequently modified;
    (5) The sister vessel is built in the same shipyard facility as the 
original vessel; and
    (6) For a sister vessel subject to a stability standard, that the 
conditions in Table 144.155 of this section are met:

                              Table 144.155
------------------------------------------------------------------------
                   If--                                Then--
------------------------------------------------------------------------
(i) The delivery date of the sister vessel  The approved lightweight
 is not more than 2 years after a previous   characteristics of that
 stability test date of either the           earlier vessel are adopted
 original vessel or an earlier sister        by the sister vessel;
 vessel,
(ii) Paragraph (a)(6)(i) of this section    The vertical center of
 does not apply, and the lightweight         gravity (VCG) of the
 characteristics determined from a           earlier vessel is adopted
 deadweight survey of the sister vessel      by the sister vessel and
 are shown to meet both the following        used with the lightweight
 criteria:                                   displacement and LCG
 (A) the lightweight displacement differs    determined from the
 by not more than 3 percent of the earlier   deadweight survey of the
 vessel's lightweight displacement, and      sister vessel;
 (B) the longitudinal center of gravity
 (LCG) differs by not more than 1 percent
 of the length between perpendiculars
 (LBP) of the earlier vessel's LCG,
(iii) Neither paragraph (a)(6)(i) nor (ii)  The vessel must undergo a
 of this section apply because both the      stability test in
 criteria in paragraphs (a)(6)(ii)(A) and    accordance with 46 CFR part
 (B) of this section are not met and         170, subpart F;
 lightweight characteristics were
 determined from a stability test on
 either the original vessel or a sister
 vessel,
(iv) No vessel of the class of sister       One vessel of the class must
 vessels previously underwent a stability    undergo a stability test in
 test,                                       accordance with 46 CFR part
                                             170, subpart F, and each
                                             sister vessel to which a
                                             stability standard applies
                                             must meet either paragraph
                                             (a)(6)(ii) or (iii) of this
                                             section.
------------------------------------------------------------------------

    (b) A statement that verifies sister vessel status for each element 
of paragraph (a) of this section from an individual or entity meeting 
the requirements of Sec.  144.140 must be retained and produced upon 
request.



Sec.  144.160  Marking.

    (a) The hull of each documented vessel must be marked as required by 
part 67 of this chapter.
    (b) The hull of each undocumented vessel must be marked with its 
name and hailing port.
    (c) A vessel complying with either Sec.  144.300(a) or Sec.  144.305 
must have draft marks that meet the requirements of Sec.  97.40-10 of 
this chapter.
    (d) Each vessel assigned a load line must have the load line marks 
and the deck line permanently scribed or embossed as required by 
subchapter E of this chapter.
    (e) Each watertight door and watertight hatch must be marked on both 
sides in clearly legible letters at least 25 millimeters (1 inch) high: 
``WATERTIGHT DOOR--KEEP CLOSED'' or ``WATERTIGHT HATCH--KEEP CLOSED''.
    (f) Each escape hatch and emergency exit used as means of escape 
must be marked on both sides in clearly legible letters at least 50 
millimeters (2 inches) high: ``EMERGENCY EXIT, KEEP CLEAR''.



                           Subpart B_Structure



Sec.  144.200  Structural standards for an existing vessel.

    An existing vessel may be deemed by the OCMI, or TPO, to be in 
compliance with this subpart provided that either:
    (a) The vessel is built, equipped, and maintained to conform to the 
rules of a recognized classification society appropriate for the 
intended service and routes, but not classed; or
    (b) The vessel has been both in satisfactory service insofar as 
structural adequacy is concerned and does not cause the structure of the 
vessel to be questioned by either the OCMI, or TPO engaged to perform an 
audit or survey.



Sec.  144.205  Structural standards for a new vessel.

    (a) Except as provided in paragraphs (b) and (c) of this section, a 
new vessels must comply with the standards established by the American 
Bureau of Shipping (ABS) as provided in the following table.

[[Page 47]]



         Table 144.205(a)--Structural Standards for a New Vessel
------------------------------------------------------------------------
  For a new vessel to be certificated for    ABS Rules for Building and
               service on--                          Classing--
------------------------------------------------------------------------
(1) Lakes, bays, and sounds, limited        Steel Vessels Under 90
 coastwise, coastwise, and oceans routes;    Meters (295 Feet) in Length
                                             (incorporated by reference,
                                             see Sec.   136.112 of this
                                             subchapter) apply; or
(2) Rivers or intracoastal waterways        Steel Vessels for Service on
 routes.                                     Rivers and Intracoastal
                                             Waterways (incorporated by
                                             reference, see Sec.
                                             136.112 of this subchapter)
                                             apply.
------------------------------------------------------------------------

    (b) Alternate design standards to comply with this subpart may be 
approved in accordance with Sec.  136.115 of this subchapter.
    (c) The current standards of a recognized classification society, 
other than ABS, may be used provided they are accepted by the Coast 
Guard as providing an equivalent level of safety.
    (d) The structural standard selected must be applied throughout the 
vessel including design, construction, installation, maintenance, 
alteration, and repair. Deviations are subject to approval by the 
Commanding Officer, Marine Safety Center.



Sec.  144.215  Special consideration.

    The cognizant OCMI may give special consideration to the structural 
requirements for a vessel if that vessel is:
    (a) Not greater than 65 feet in length;
    (b) Operating exclusively within a limited geographic area; or
    (c) Of an unusual design not contemplated by the rules of the 
American Bureau of Shipping or other recognized classification society.



              Subpart C_Stability and Watertight Integrity



Sec.  144.300  Stability standards for an existing vessel.

    (a) The owner or managing operator of an existing vessel operating 
under a stability document must be able to readily produce a copy of 
such document.
    (b) The owner or managing operator of an existing vessel not 
operating under a stability document must be able to show at least one 
of the following:
    (1) The vessel's operation or a history of satisfactory service does 
not cause the stability of the vessel to be questioned by either the 
Coast Guard or a TPO engaged to perform an audit or survey.
    (2) The vessel performs successfully on operational tests to 
determine whether the vessel has adequate stability and handling 
characteristics.
    (3) The vessel has a satisfactory stability assessment by means of 
giving due consideration to each item that impacts a vessel's stability 
characteristics which include, but are not limited to, the form, 
arrangement, construction, number of decks, route, and operating 
restrictions of the vessel.



Sec.  144.305  Stability standards for a new vessel.

    Each new vessel must meet the applicable stability requirements of 
part 170 and, if applicable, of part 173, subpart E, of this chapter in 
addition to the requirements in the following table:

           Table 144.305--Stability Standards for a New Vessel
------------------------------------------------------------------------
  Each new vessel certificated to operate    Must meet the requirements
                   on--                                 of--
------------------------------------------------------------------------
(a) Protected waters......................  Sec.   170.173(e)(2) of this
                                             chapter.
(b) Partially protected waters............  Sec.  Sec.   170.170 and
                                             170.173(e)(1) of this
                                             chapter.
(c) Exposed waters or that is assigned a    Sec.  Sec.   170.170 and
 load line.                                  174.145 of this chapter.
------------------------------------------------------------------------



Sec.  144.310  Lifting requirements for a new vessel.

    Each new vessel equipped for lifting must meet the requirements of 
part 173, subpart B, of this chapter.



Sec.  144.315  Weight and moment history requirements for a vessel
with approved lightweight characteristics.

    (a) A weight and moment history of changes to the vessel since 
approval of its lightweight characteristics (displacement, Longitudinal 
Center of Gravity (LCG) and Vertical Center of Gravity (VCG)) must be 
maintained. All weight modifications to the vessel (additions, removals, 
and relocations) including a calculation of the aggregate weight change 
(absolute total of all additions, removals, and relocations) must be 
recorded in the history,

[[Page 48]]

along with a description of the change(s), when and where accomplished, 
moment arms, etc. After each modification, the lightweight 
characteristics must be recalculated.
    (b) When the aggregate weight change is more than 2 percent of the 
vessel's approved lightweight displacement, or the recalculated change 
in the vessel's lightweight LCG is more than 1 percent of the LBP, a 
deadweight survey must be performed to determine the vessel's current 
lightweight displacement and LCG. Use the following table to determine 
when the deadweight survey results or the vessel's aggregate weight 
change requires the vessel to undergo a specified stability test:

                              Table 144.315
------------------------------------------------------------------------
                   If--                                Then--
------------------------------------------------------------------------
(1) The deadweight survey results are both  the recalculated lightweight
 within 1 percent of the recalculated        VCG can be accepted as
 lightweight displacement and within 1       accurate;
 percent LBP of the recalculated
 lightweight LCG,
(2) The deadweight survey results do not    the vessel must undergo a
 meet the criteria of paragraph (b)(1) of    stability test in
 this section,                               accordance with 46 CFR 170,
                                             subpart F;
(3) The aggregate weight change is more     the vessel must undergo a
 than 10 percent of the vessel's approved    stability test in
 lightweight displacement,                   accordance with 46 CFR 170,
                                             subpart F.
------------------------------------------------------------------------



Sec.  144.320  Watertight or weathertight integrity.

    (a) Each vessel fitted with installed bulwarks around the exterior 
of the main deck must have sufficient freeing ports or scuppers or a 
combination of freeing ports and scuppers to allow water to run off the 
deck quickly without adversely affecting the stability of the vessel.
    (b) Closure devices must be provided for deckhouse or hull 
penetrations, which open to the exterior of the vessel and which may 
allow water to enter the vessel. These devices must be suitable for the 
expected route.



Sec.  144.330  Review of a vessel's watertight and weathertight integrity.

    The cognizant OCMI may require review of a vessel's watertight and 
weathertight integrity. This review may be performed by an individual 
who meets the requirements of Sec.  144.140. The review may include an 
examination of a plan that shows the original placement of decks and 
bulkheads.



                        Subpart D_Fire Protection



Sec.  144.400  Applicability.

    Except for Sec.  144.415, which applies to each new and existing 
vessel, this subpart applies to each new towing vessel.



Sec.  144.405  Fire hazards to be minimized.

    Each vessel must be designed and constructed to minimize fire 
hazards insofar as reasonable and practicable.



Sec.  144.410  Separation of machinery and fuel tank spaces from
accommodation spaces.

    Machinery and fuel tank spaces must be separated from accommodation 
spaces by bulkheads. Doors may be installed provided they are the self-
closing type.



Sec.  144.415  Combustibles insulated from heated surfaces.

    Internal combustion engine exhaust ducts, galley exhaust ducts and 
similar ignition sources must be insulated with noncombustible 
insulation if less than 450 mm (18 inches) away from combustible 
material. Installations in accordance with ABYC P-1 or NFPA 302 
(incorporated by reference, see Sec.  136.112 of this subchapter) will 
be considered as meeting the requirements of this section.



Sec.  144.425  Waste receptacles.

    Unless other means are provided to ensure that a potential waste 
receptacle fire would be limited to the receptacle, waste receptacles 
must be constructed of noncombustible materials with no openings in the 
sides or bottom.



Sec.  144.430  Mattresses.

    Each mattress must comply with either:
    (a) The Consumer Product Safety Commission Standard for Mattress 
Flammability (FF 4-72, Amended), 16 CFR part 1632, subpart A, and not 
contain polyurethane foam; or
    (b) IMO Resolution A.688(17) (incorporated by reference, see Sec.  
136.112 of

[[Page 49]]

this subchapter) in which case the mattress may contain polyurethane 
foam.



                       Subpart E_Emergency Escape



Sec.  144.500  Means of escape.

    Where practicable and except as provided in Sec.  144.515, each 
space where crew may be quartered or normally employed must have at 
least two means of escape. Arrangements on an existing vessel may be 
retained if it is impracticable or unreasonable to provide two means of 
escape.



Sec.  144.505  Location of escapes.

    The two required means of escape must be widely separated and, if 
possible, at opposite ends or sides of the space. Means may include 
normal and emergency exits, passageways, stairways, ladders, deck 
scuttles, doors, and windows.



Sec.  144.510  Window as a means of escape.

    On a vessel of 65 feet (19.8 meters) or less in length, a window or 
windshield of sufficient size and proper accessibility may be used as 
one of the required means of escape from an enclosed space, provided it:
    (a) Does not lead directly overboard;
    (b) Is suitably marked; and
    (c) Has a means to open the window or break the glass.



Sec.  144.515  One means of escape required.

    Only one means of escape is required from a space where:
    (a) The space has a deck area less than 30 square meters (322 square 
feet);
    (b) There is no stove, heater, or other source of fire in the space;
    (c) The means of escape is located as far as possible from a 
machinery space or fuel tank; and
    (d) If an accommodation space, the single means of escape does not 
include a deck scuttle or a ladder.



                          Subpart F_Ventilation



Sec.  144.600  Ventilation for accommodations.

    Each accommodation space on a vessel must be ventilated in a manner 
suitable for the purpose of the space.



Sec.  144.605  Means to stop fans and close openings.

    Means must be provided for stopping each fan in a ventilation system 
serving machinery spaces and for closing, in case of fire, each doorway, 
ventilator, and annular space around funnels and other openings into 
such spaces.



Sec.  144.610  Ventilation in a vessel more than 65 feet in length.

    A vessel of more than 65 feet (19.8 meters) in length with overnight 
accommodations must have a mechanical ventilation system unless a 
natural system, such as opening windows, portholes, or doors, will 
provide adequate ventilation in ordinary weather.



                          Subpart G_Crew Spaces



Sec.  144.700  General requirements.

    (a) A crew accommodation space and a work space must be of 
sufficient size, adequate construction, and with suitable equipment to 
provide for the safe operation of the vessel and the protection and 
accommodation of the crew in a manner practicable for the size, 
facilities, service, route, and modes of operation of the vessel.
    (b) The deck above a crew accommodation space must be located above 
the deepest load waterline.



Sec.  144.710  Overnight accommodations.

    Overnight accommodations must be provided for crewmembers if it is 
operated more than 12 hours in a 24-hour period, unless the crew is put 
ashore and the vessel is provided with a new crew.



Sec.  144.720  Crew rest consideration.

    The condition of the crew accommodations must consider the 
importance of crew rest. Factors to consider include vibrations, ambient 
light, noise levels, and general comfort. Every effort must be made to 
ensure that quarters help provide a suitable environment for sleep and 
off-duty rest.

[[Page 50]]



                       Subpart H_Rails and Guards



Sec.  144.800  Handrails and bulwarks.

    (a) Rails or equivalent protection must be installed near the 
periphery of all decks accessible to crew. Equivalent protection may 
include lifelines, wire rope, chains, and bulwarks that provide strength 
and support equivalent to fixed rails.
    (b) In areas where space limitations make deck rails impractical, 
such as at narrow catwalks in way of deckhouse sides, hand grabs may be 
substituted.



Sec.  144.810  Storm rails.

    On a vessel in oceans or coastwise service, suitable storm rails or 
hand grabs must be installed in all passageways and at the deckhouse 
sides where persons onboard might have normal access.



Sec.  144.820  Guards in dangerous places.

    An exposed hazard such as gears and rotating machinery, must be 
protected by a cover, guard or rail. This is not meant to restrict 
access to towing equipment such as winches, drums, towing gear or 
steering compartment equipment necessary for the operation of the 
vessel.



Sec.  144.830  Protection against hot piping.

    Each exhaust pipe from an internal combustion engine which is within 
reach of personnel must be insulated or otherwise guarded to prevent 
burns. On a new vessel, each pipe that contains vapor, gas, or liquid 
that has a temperature exceeding 150 [deg]F (65.5 [deg]C) which is 
within reach of personnel must be insulated where necessary or otherwise 
guarded to prevent injury.



                          Subpart I_Visibility



Sec.  144.905  Operating station visibility.

    (a) Windows and other openings at the operating station must be of 
sufficient size and properly located to provide a clear field of vision 
for safe operation in any condition.
    (b) Means must be provided to ensure that windows immediately 
forward of the operating station in the pilothouse allow for adequate 
visibility to ensure safe navigation regardless of weather conditions. 
This may include mechanical means such as windshield wipers, defoggers, 
clear-view screens, or other such means, taking into consideration the 
intended route of the vessel.
    (c) The field of vision from the operating station on a new vessel 
must extend over an arc from dead ahead to at least 60 degrees on either 
side of the vessel.
    (d) If a new vessel is towing astern, the operating station must be 
provided with a view aft.
    (e) In a new vessel, glass or other glazing material used in windows 
at the operating station must have a light transmission of not less than 
70 percent according to Test 2 of ANSI/SAE Z 26.1-1996 (incorporated by 
reference, see Sec.  136.112 of this subchapter) and must comply with 
Test 15 of ANSI/SAE Z 26.1-1996 for Class I Optical Deviation.



Sec.  144.920  Window or portlight strength in a new vessel.

    (a) Each window or portlight, and its means of attachment to the 
hull or the deckhouse, must be capable of withstanding the maximum 
expected load from wind and waves, due to its location on the vessel and 
the vessel's authorized route.
    (b) Any covering or protection placed over a window or porthole that 
could be used as a means of escape must be able to be readily removed or 
opened from within the space.
    (c) Glass and other glazing materials used in windows of a new 
towing vessel must be materials that will not break into dangerous 
fragments if fractured.

[[Page 51]]



                     SUBCHAPTER N_DANGEROUS CARGOES



                        PARTS 145	146 [RESERVED]



PART 147_HAZARDOUS SHIPS' STORES--Table of Contents



                      Subpart A_General Provisions

Sec.
147.1 Purpose and applicability.
147.3 Definitions.
147.5 Commandant (CG-OES); address.
147.7 Incorporation by reference.
147.8 OMB control numbers assigned pursuant to the Paperwork Reduction 
          Act.
147.9 Waivers.
147.15 Hazardous ships' stores permitted on board vessels.
147.30 Labeling.
147.33 Right of appeal.

    Subpart B_Stowage and Other Special Requirements for Particular 
                                Materials

147.35 Purpose of subpart.
147.40 Materials requiring Commandant (CG-OES) approval.
147.45 Flammable and combustible liquids.
147.50 Fuel for cooking, heating, and lighting.
147.60 Compressed gases.
147.65 Carbon dioxide and Halon fire extinguishing systems.
147.66 Inert gas fire extinguishing systems.
147.67 Halocarbon fire extinguishing systems.
147.70 Acetylene.
147.85 Oxygen.
147.90 Refrigerants.
147.95 Explosives.
147.100 Radioactive materials.
147.105 Anesthetics, drugs, and medicines.

    Authority: 46 U.S.C. 3306; E.O. 12234, 45 FR 58801, 3 CFR, 1980 
Comp., p. 277; Department of Homeland Security Delegation No. 0170.1.

    Source: CGD 84-044, 53 FR 7749, Mar. 10, 1988, unless otherwise 
noted.

    Editorial Note: Nomenclature changes to part 147 appear by USCG-
2009-0702, 74 FR 49235, Sept. 25, 2009, and USCG-2012-0832, 77 FR 59782, 
Oct. 1, 2012.



                      Subpart A_General Provisions



Sec.  147.1  Purpose and applicability.

    (a) This part prescribes regulations designating what hazardous 
materials may be on board vessels as ships' stores and prescribes 
requirements for the labeling, stowage, and use of those materials.
    (b) This part applies to all vessels listed in 46 U.S.C. 3301 as 
subject to inspection under part B of 46 U.S.C. Subtitle II. On foreign 
vessels in the navigable waters of the United States, the Captain of the 
Port or District Commander may prohibit the unsafe use or stowage of 
hazardous ships' stores under 33 CFR 160.109.
    (c) All certifications previously issued by the Coast Guard under 
this part permitting the use of particular materials or products as 
ships' stores are null and void.
    (d) The regulations in this subchapter (46 CFR parts 147, 147A, and 
148) have preemptive effect over State or local regulations in the same 
field.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by USCG-2006-24797, 
77 FR 33885, June 7, 2012; USCG-2012-0196, 81 FR 48272, July 22, 2016]



Sec.  147.3  Definitions.

    As used in this part:
    Accommodation, control, or service spaces means living quarters, 
including walkways, dining rooms, galleys, pantries, lounges, 
lavatories, cabins, staterooms, offices, hospitals, cinemas, and game 
and hobby rooms; areas containing controls for equipment and navigation; 
workshops, other than those forming part of machinery spaces; and store 
rooms adjacent to these spaces.
    Combustible liquid means combustible liquid as the term is defined 
in 49 CFR 173.120(b).
    Compressed gas means compressed gas as the term is defined in 49 CFR 
173.115.
    Consumer commodity means a commodity, such as a polish, insecticide, 
cleaning compound, or distillate, that is packaged and distributed in a 
form and quantity intended for sale through retail sales establishments.
    Flammable liquid means flammable liquid as the term is defined in 49 
CFR 173.120(a).
    Hazardous material means hazardous material as the term is defined 
in 49 CFR 171.8.

[[Page 52]]

    Hazardous ships' stores means ships' stores that are hazardous 
materials.
    Proper shipping name means the name of the hazardous ships' stores 
shown in Roman print (not in italics) in 49 CFR 172.101.
    Ships' stores means materials which are on board a vessel for the 
upkeep, maintenance, safety, operation, or navigation of the vessel 
(except for fumigants under part 147A of this chapter, for fuel and 
compressed air used for the vessel's primary propulsion machinery, or 
for fixed auxiliary equipment) or for the safety or comfort of the 
vessel's passengers or crew.
    Technical name means the recognized chemical name used in scientific 
or technical publications.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 97-057, 62 FR 
51048, Sept. 30, 1997]



Sec.  147.5  Commandant (CG-OES); address.

    Commandant (CG-ENG) is the Office of Design and Engineering 
Standards. The mailing address is Commandant (CG-ENG), Attn: Office of 
Design and Engineering Systems, U.S. Coast Guard Stop 7509, 2703 Martin 
Luther King Jr. Avenue SE., Washington, DC 20593-7509; telephone 202-
372-1372.

[USCG-2013-0671, 78 FR 60154, Sept. 30, 2013]



Sec.  147.7  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 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 is available for inspection at Coast Guard 
Headquarters. Contact Commandant (CG-ENG), Attn: Office of Design and 
Engineering Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King 
Jr. Avenue SE., Washington, DC 20593-7509. The material is also 
available from the sources listed below. It is also available for 
inspection at the National Archives and Records Administration (NARA). 
For information on the availability of this material at NARA, call 202-
741-6030 or go to http://www.archives.gov/federal_register/
code_of_federal_regulations/ibr_locations.html.
    (b) American Boat and Yacht Council, Inc. (ABYC), 613 Third Street, 
Suite 10, Annapolis, MD 21403, telephone 410-990-4460, www.abyinc.org.
    (1) ABYC H-25-81, Portable Fuel Systems and Portable Containers for 
Flammable Liquids, (May 12, 1981), (``ABYC H-25-81''), IBR approved for 
Sec.  147.45.
    (2) [Reserved]
    (c) American Society of Heating, Refrigerating, and Air-Conditioning 
Engineers, Inc. (ASHRAE), Publication Sales Department, 1791 Tullie 
Circle NE., Atlanta, GA 30329, telephone 404-636-8400, www.ashrae.org.
    (1) ANSI/ASHRAE 34-78, Number Designation of Refrigerants (approved 
1978), (``ANSI/ASHRAE 34-78''), IBR approved for Sec.  147.90.
    (2) [Reserved]
    (d) Compressed Gas Association, Inc. (CGA), 14501 George Carter Way, 
Suite 103, Chantilly, Virginia 20151, 703-788-2700, http://
www.cganet.com.
    (1) CGA C-6-2007, Standards for Visual Inspection of Steel 
Compressed Gas Cylinders, Tenth Edition, 2007, IBR approved for Sec.  
147.65(b).
    (2) [Reserved]
    (e) National Fire Protection Association (NFPA), 1 Batterymarch 
Park, Quincy, MA 02169, 617-770-3000, http://www.nfpa.org.
    (1) NFPA 2001, Standard on Clean Agent Fire Extinguishing Systems, 
2008 Edition, IBR approved for Sec. Sec.  147.66(c) and 147.67(c).
    (2) NFPA 12A, Standard on Halon 1301 Fire Extinguishing Systems, 
2009 Edition, effective July 18, 2008, IBR approved for Sec.  147.65(b).
    (f) Public Health Service (PHS), Department of Health and Human 
Services (DHHS), Superintendent of Documents, U.S. Government Printing 
Office, 710 North Capitol Street NW., Washington, DC 20401, 866-512-
1800, http://www.gpo.gov.
    (1) DHHS Publication No. PHS 84-2024, The Ship's Medicine Chest and 
Medical Aid at Sea, revised 1984, IBR approved for Sec.  147.105.
    (2) [Reserved]

[[Page 53]]

    (g) UL (formerly Underwriters Laboratories), 12 Laboratory Drive, 
P.O. Box 13995, Research Triangle Park, NC 27709, 919-549-1400, http://
www.ul.com.
    (1) UL 30, Standard for Metal Safety Cans, 7th Ed., revised March 3, 
1987, (``UL 30''), IBR approved for Sec.  147.45(f).
    (2) UL 1185, Standard for Portable Marine Fuel Tanks, Second 
Edition, revised July 6, 1984, (``UL 1185''), IBR approved for Sec.  
147.45(f).
    (3) UL 1313, Standard for Nonmetallic Safety Cans for Petroleum 
Products, 1st Ed., revised March 22, 1985, (``UL 1313''), IBR approved 
for Sec.  147.45(f).
    (4) UL 1314, Standard for Special-Purpose Containers, 1st Ed., 
revised February 7, 1984, (``UL 1314''), IBR approved for Sec.  
147.45(f).

[USCG-2006-24797, 77 FR 33885, June 7, 2012, as amended by USCG-2013-
0671, 78 FR 60154, Sept. 30, 2013; USCG-2012-0196, 81 FR 48272, July 22, 
2016]



Sec.  147.8  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.
------------------------------------------------------------------------
Sec.   147.9...............................................    1625-0034
Sec.   147.30..............................................    1625-0034
Sec.   147.40..............................................    1625-0034
Sec.   147.60(c)(2)........................................    1625-0034
------------------------------------------------------------------------


[CGD 88-072, 53 FR 34298, Sept. 6, 1988; CGD 88-072, 53 FR 37570, Sept. 
27, 1988, as amended by USCG-2004-18884, 69 FR 58349, Sept. 30, 2004]



Sec.  147.9  Waivers.

    (a) Any requirement in this part may be waived on a case by case 
basis if it is determined by Commandant (CG-ENG) that the requirement is 
impracticable under the circumstances and that an acceptable level of 
safety can be maintained.
    (b) Requests for issuance of a waiver must be in writing and contain 
a detailed explanation of--
    (1) Why the requirement is impracticable; and
    (2) What measures will be taken to maintain an acceptable or 
equivalent level of safety.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 95-072, 60 FR 
50465, Sept. 29, 1995; CGD 96-041, 61 FR 50731, Sept. 27, 1996; USCG-
2013-0671, 78 FR 60154, Sept. 30, 2013]



Sec.  147.15  Hazardous ships' stores permitted on board vessels.

    Unless prohibited under subpart B of this part, any hazardous 
material may be on board a vessel as ships' stores if the material--
    (a) Is labeled according to Sec.  147.30; and
    (b) Meets the requirements, if any, in subpart B of this part 
applicable to the material.



Sec.  147.30  Labeling.

    (a) Except as provided in paragraph (b) of this section, all 
immediate receptacles, containers, or packages containing hazardous 
ships' stores must be labeled in English with the following information 
concerning the contents:
    (1) Technical name or proper shipping name.
    (2) For hazardous ships' stores other than liquid fuels, 
manufacturer's or supplier's name and address.
    (3) Hazard classification under 49 CFR 172.101, 173.2, and 173.2(a).
    (4) For hazardous ships' stores other than liquid fuels, step by 
step procedures for proper use.
    (5) First aid instructions in the event of personnel contact, 
including antidotes in the event of ingestion.
    (6) Stowage and segregation requirements.
    (b) Hazardous ships' stores that are consumer commodities labeled in 
accordance with the Federal Hazardous Substances Act Regulations in 16 
CFR

[[Page 54]]

part 1500 need not be labeled as specified in paragraph (a) of this 
section.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 97-057, 62 FR 
51048, Sept. 30, 1997; USCG-2005-22329, 70 FR 57183, Sept. 30, 2005]



Sec.  147.33  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 50381, Dec. 6, 1989; 55 FR 21386, May 24, 1990]



    Subpart B_Stowage and Other Special Requirements for Particular 
                                Materials



Sec.  147.35  Purpose of subpart.

    This subpart prescribes special requirements applicable to 
particular, named materials. These requirements are in addition to the 
general requirements in subpart A applicable to those materials.



Sec.  147.40  Materials requiring Commandant (CG-OES) approval.

    (a) Commandant (CG-ENG) approval is required before the following 
hazardous materials may be on board a vessel as ships' stores:
    (1) Poison gases of Class 2, Division 2.3 and toxic liquids of Class 
6, Division 6.1 which are poisonous by inhalation in Hazard Zone A.
    (2) Explosives of Divisions 1.1 or 1.2.
    (3) Flammable gases, other than those addressed specifically in this 
subpart.
    (4) Forbidden materials listed in 49 CFR 172.101.
    (b) Request for approval must be submitted to the Commandant (CG-
ENG), identify the material, and explain the need for its use.
    (c) Upon approval, the material is added to the list of materials 
approved under this section. A copy of this list is available from the 
Commandant (CG-ENG) at the address in Sec.  147.5.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 95-072, 60 FR 
50465, Sept. 29, 19955; CGD 96-041, 61 FR 50731, Sept. 27, 1996; CGD 97-
057, 62 FR 51048, Sept. 30, 1997; USCG-2013-0671, 78 FR 60154, Sept. 30, 
2013]



Sec.  147.45  Flammable and combustible liquids.

    (a) This section applies to the stowage and transfer of flammable 
and combustible liquids (including gasoline and diesel oil), other than 
liquids used as fuel for cooking, heating, and lighting under Sec.  
147.50.
    (b) No flammable or combustible liquids may be stowed in any 
accommodation, control, or service space (other than a paint locker).
    (c) No more than 19 liters (five gallons) of flammable liquids may 
be stowed in any machinery space. The flammable liquids must be in 
containers of 3.8 liters (one gallon) or less.
    (d) No more than 208 liters (55 gallons) of combustible liquids may 
be stowed in any machinery space.
    (e) An aggregate of more than 7.6 liters (two gallons) of flammable 
or combustible liquids stowed outside of an accommodation, control, or 
service, space (other than a paint locker) or outside of a machinery 
space must be stowed in a paint locker that is marked with a warning 
sign indicating flammable or combustible liquid storage.
    (f) Flammable and combustible liquids used as fuel for portable 
auxiliary equipment must be stored in--
    (1) Integral tanks that form part of the vessel's structure;
    (2) An independent tank meeting the requirements of subpart 58.50 of 
Part 58 of this chapter;
    (3) A non-bulk packaging authorized for Class 3 (flammable) liquids 
or combustible liquids under 49 CFR 173.201, 173.202, or 173.203, as 
referenced for the specific liquid in column 8B of the Hazardous 
Materials Table of 49 CFR 172.101.
    (4) A portable outboard fuel tank meeting the specifications of ABYC 
H-25-81 (incorporated by reference, see Sec.  147.7) or one identified 
by Underwriters Laboratories as meeting the specifications of UL 1185 
(incorporated by reference, see Sec.  147.7);
    (5) A portable safety container identified by Underwriters 
Laboratories as meeting the specifications of UL 30 or UL 1313 (both 
incorporated by reference, see Sec.  147.7); or
    (6) A portable safety container identified by Underwriters 
Laboratories as

[[Page 55]]

meeting the requirements of UL 1314 (incorporated by reference, see 
Sec.  147.7).
    (g) Each portable container of flammable or combustible liquid used 
for portable auxiliary equipment must be stowed in a paint locker or an 
open location designated by the master.
    (h) Fuel tanks for portable auxiliary equipment using flammable or 
combustible liquids may only be refilled on a vessel--
    (1) By using a container described in paragraph (f)(2), (f)(3), or 
(f)(5) of this section which has a capacity not exceeding 23 liters (6 
gallons); or
    (2) In the case of portable outboard fuel tanks described in 
paragraph (f)(4) of this section, in accordance with paragraph (i) of 
this section.
    (i) Portable containers or portable outboard fuel tanks may be 
refilled from a larger container of flammable or combustible liquid on 
the weather deck of a vessel, other than a small passenger vessel 
subject to Subchapter T of this chapter, provided that--
    (1) A drip pan of adequate size is used to collect any drippings; 
and
    (2) At least one Coast Guard approved Type B, Size I, fire 
extinguisher is within three meters (9.75 feet) of the refilling 
location.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 92-100, 59 FR 
17001, Apr. 11, 1994; CGD 97-057, 62 FR 51048, Sept. 30, 1997; USCG-
2006-24797, 77 FR 33885, June 7, 2012]



Sec.  147.50  Fuel for cooking, heating, and lighting.

    (a) Flammable and combustible liquids and gases not listed in this 
section are prohibited for cooking, heating, or lighting on any vessel, 
with the exception of combustible liquids on cargo vessels.
    (b) Fluid alcohol is prohibited for cooking, heating, or lighting on 
ferry vessels. Fluid alcohol burners, where wet primed, must have a 
catch pan not less than \3/4\ of an inch deep secured inside of the 
frame of the stove or have the metal protection under the stove flanged 
up \3/4\ of an inch to form a pan.
    (c) Containers of solidified alcohol must be secured on a fixed 
base.
    (d) Liquefied or non-liquefied gas is prohibited for cooking, 
heating, and lighting on ferry vessels, but may be used on other 
inspected vessels if the system in which it is used meets the applicable 
requirements of subpart 58.16 or subpart 184.05 of this chapter, as 
appropriate, or is approved by the Commandant (CG-ENG).
    (e) Kerosene and commercial standard fuel oil No. 1, No. 2, and No. 
3 are prohibited for cooking, heating, or lighting on ferry or passenger 
vessels, unless the following conditions are met:
    (1) Pressure or gravity feed must be used.
    (2) Where wet priming is used in a cooking device, the device must 
have a catch pan not less than three fourths of an inch deep secured 
inside the frame of the device or a metal protector under the device 
with a least a three fourths inch flange to form a pan.
    (3) Where wet priming is used, a non-flammable priming liquid must 
be used.
    (4) Fuel tanks for fixed stoves must be separated from the stove and 
mounted in a location open to the atmosphere or mounted inside a 
compartment with an outside fill and vent.
    (5) Fuel lines must have an easily accessible shut-off valve at the 
tank.
    (6) If the fuel tank is outside of a stove compartment, a shut-off 
valve must be fitted at the stove.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 83-013, 54 FR 
6402, Feb. 10, 1989; CGD 95-072, 60 FR 50465, Sept. 29, 1995; CGD 96-
041, 61 FR 50731, Sept. 27, 1996]



Sec.  147.60  Compressed gases.

    (a) Cylinder requirements. Cylinders used for containing hazardous 
ships' stores that are compressed gases must be--
    (1) Authorized for the proper shipping name of the gas in accordance 
with 49 CFR 172.101 and 49 CFR part 173;
    (2) Constructed in accordance with subpart C of 49 CFR part 178 or 
exempted under 49 CFR part 107;
    (3) Filled, marked, and inspected in accordance with 49 CFR 173.301 
through 173.308; and
    (4) Except as provided in 46 CFR 147.65, 147.66, and 147.67, 
maintained and retested in accordance with 49 CFR 180.
    (b) Stowage and care of cylinders. (1) Cylinders must always be 
secured and, when not in use, they must be stowed

[[Page 56]]

in a rack in an upright position, with the valve protection cap in 
place.
    (2) Lockers or housings must be vented to the open air near the top 
and bottom for positive circulation of vapors.
    (3) Cylinders must be protected from all sources of heat which may 
cause the cylinders to be heated to a temperature higher than 130 
[deg]F.
    (c) Pressure vessels other than cylinders. Pressure vessels, other 
than cylinders subject to paragraph (a) of this section, used for 
containing ships' stores that are compressed gases must--
    (1) Be constructed and inspected in accordance with part 54 of this 
chapter; and
    (2) Carry only nitrogen or air, unless permission is granted by 
Commandant (CG-ENG) to do otherwise.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 95-072, 60 FR 
50465, Sept. 29, 19955; CGD 96-041, 61 FR 50731, Sept. 27, 1996; USCG-
2006-24797, 77 FR 33886, June 7, 2012; USCG-2013-0671, 78 FR 60154, 
Sept. 30, 2013]



Sec.  147.65  Carbon dioxide and Halon fire extinguishing systems.

    (a) Carbon dioxide cylinders forming part of a fixed fire 
extinguishing system must be maintained as follows:
    (1) Cylinders must be retested at least every 12 years. If a 
cylinder is discharged and more than 5 years have elapsed since the last 
test, it must be retested before recharging.
    (2) Carbon dioxide cylinders must be rejected for further service 
when they:
    (i) Leak;
    (ii) Are dented, bulging, severely corroded, or otherwise in a 
weakened condition;
    (iii) Have lost more than 5 percent of their tare weight; or
    (iv) Have been involved in a fire.
    (3) Cylinders which have contained gas agents for fixed fire 
extinguishing systems and have not been tested within 5 years must not 
be used to contain another compressed gas onboard a vessel, unless the 
cylinders are retested and re-marked in accordance with Sec.  
147.60(a)(3) and (4).
    (4) Flexible connections between cylinders and distribution piping 
of semi-portable or fixed carbon dioxide fire extinguishing systems and 
discharge hoses in semi-portable carbon dioxide fire extinguishing 
systems must be replaced or tested at a pressure of 6.9 MPa (1,000 
psig). At test pressure, the pressure must not drop at a rate greater 
than 1.03 MPa (150 psi) per minute for a 2-minute period. The test must 
be performed when the cylinders are retested.
    (b) Halon cylinders forming part of a fixed fire extinguishing 
system must be maintained as follows:
    (1) The agent weight must be ascertained annually by one of the 
methods identified in paragraphs (b)(2) through (b)(4) of this section. 
Measured weights or liquid levels must be recorded and compared with the 
recommended fill levels and previous readings. If cylinder weight or 
liquid level, adjusted for temperature, shows a 5 percent loss of 
pressure, the cylinder must be refilled. If cylinder pressure, adjusted 
for temperature, shows a 10 percent loss of pressure, the cylinders must 
be refilled.
    (2) The cylinders may be removed from the mounting racks and 
weighed.
    (3) The contents of cylinders fitted with integral floating dipstick 
liquid level indicators may be measured with the dipstick indicator.
    (4) With approval of the cognizant Officer in Charge, Marine 
Inspection (OCMI), liquid level indication measures such as ultrasonic/
audio gauging or radioisotope gauging may be used, provided that all of 
the following conditions are met:
    (i) Measurement equipment is calibrated for the cylinder wall 
thickness and Halon liquid.
    (ii) Calibration is verified by weighing the cylinders that indicate 
the lowest levels of Halon in each release group, but in no case less 
than 10 percent of the inspected cylinders in each release group.
    (iii) The acceptable liquid level is identified by the original 
system installer or coincides with all other cylinder liquid levels of 
the same release group.
    (iv) Measurements are made by personnel skilled in ultrasonic/audio 
gauging or radioisotope gauging techniques.
    (5) Effective 12 years after commissioning of the system or 5 years 
after the last hydrostatic test, whichever is

[[Page 57]]

later, the following inspections must be completed every 5 years:
    (i) Cylinders continuously in service without discharging must be 
removed from mounting racks and given a complete external visual 
inspection. The inspection must be conducted in accordance with the CGA 
Pamphlet C-6 (incorporated by reference, see Sec.  147.7).
    (ii) The volume of agent must be ascertained either by removing and 
weighing the cylinder or by floating liquid level indicators, integral 
with the cylinder construction, taking into account adjustments 
necessary for cylinder temperature and pressure.
    (6) Flexible connections between cylinders and distribution piping 
of fixed Halon fire extinguishing systems must be:
    (i) Visually inspected for damage, corrosion, or deterioration every 
year and replaced if found unserviceable; and
    (ii) Inspected and tested in accordance with NFPA 12A, paragraph 
6.3.1 (incorporated by reference, see Sec.  147.7) except that 
hydrostatic testing must be performed every 12 years instead of every 5 
years.
    (7) During any inspection, cylinders must be removed from service if 
they:
    (i) Leak;
    (ii) Are dented, bulging, severely corroded, or otherwise in a 
weakened condition; or
    (iii) Have been involved in a fire.
    (c) Cylinders that have contained carbon dioxide or Halon and have 
not been tested within 5 years must not be used to contain another 
compressed gas onboard a vessel, unless the cylinder is retested and re-
marked in accordance with Sec.  147.60(a)(3) and (4).

[USCG-2012-0196, 81 FR 48272, July 22, 2016]



Sec.  147.66  Inert gas fire extinguishing systems.

    (a) Inert gas cylinders forming part of a clean agent fixed fire 
extinguishing system must be retested every five years, except that 
cylinders with a water capacity of 125 pounds or less may be retested 
every 10 years in accordance with 49 CFR 180.209(b).
    (b) An inert gas cylinder must be removed from service if it:
    (1) Leaks;
    (2) Is dented, bulging, severely corroded, or otherwise weakened;
    (3) Has lost more than 5 percent of its tare weight; or
    (4) Has been involved in a fire.
    (c) Flexible connections between cylinders and discharge piping for 
fixed inert gas fire extinguishing systems must be renewed or retested 
in accordance with section 7.3 of NFPA 2001 (incorporated by reference, 
see Sec.  147.7).

[USCG-2006-24797, 77 FR 33886, June 7, 2012]



Sec.  147.67  Halocarbon fire extinguishing systems.

    (a) Each halocarbon cylinder forming part of a clean agent fixed 
fire extinguishing system must be:
    (1) Retested at least once every 12 years and before recharging if 
it has been discharged and more than five years have elapsed since the 
last test; or
    (2) As an alternative, a cylinder conforming to the requirements of 
49 CFR 180.209(g) may be given the complete external visual inspection 
in lieu of hydrostatic testing provided for by that section.
    (b) A halocarbon cylinder must be removed from service if it:
    (1) Leaks;
    (2) Is dented, bulging, severely corroded, or otherwise weakened;
    (3) Has lost more than 5 percent of its tare weight; or
    (4) Has been involved in a fire.
    (c) Flexible connections between cylinders and discharge piping for 
halocarbon fire extinguishing systems must be renewed or retested in 
accordance with section 7.3 of NFPA 2001 (incorporated by reference, see 
Sec.  147.7).

[USCG-2006-24797, 77 FR 33886, June 7, 2012]



Sec.  147.70  Acetylene.

    (a) Seventeen cubic meters (600 standard cubic feet) or less of 
acetylene may be stowed on or below decks on any vessel.
    (b) More than 17 m\3\ (600 standard cubic feet) of acetylene may be 
on board a vessel engaged in industrial operations, if it is stowed on 
deck.

[[Page 58]]



Sec.  147.85  Oxygen.

    (a) Eighty five cubic meters (3000 standard cubic feet) or less of 
oxygen may be on board any vessel.
    (b) More than 85 m\3\ (3000 standard cubic feet) of oxygen may be on 
board a vessel engaged in industrial operations, if it is stowed on deck 
or in a well ventilated space.



Sec.  147.90  Refrigerants.

    (a) Only refrigerants listed in ANSI/ASHRAE 34-78 may be carried as 
ships' stores.
    (b) Refrigerants contained in a vessel's operating system are not 
considered as being carried as ship's stores.



Sec.  147.95  Explosives.

    (a) Explosives--general. Except as provided for elsewhere in this 
subchapter, explosives, as defined in 49 CFR 173.50, which are hazardous 
ships' stores must be stowed in accordance with 49 CFR 176.116 through 
176.138.
    (b) Small arms ammunition. (1) No person shall bring, have in their 
possession, or use on board a vessel any small arms ammunition, except 
by express permission of the master of the vessel.
    (2) All small arms ammunition must be stowed and locked in a metal 
closed cargo transport unit for Class 1 (explosive) materials as defined 
in 49 CFR 176.2. The key to the cargo transport unit must be kept in the 
possession of the master or a person designated by the master.
    (c) Ships' signals and emergency equipment. (1) Explosive ships' 
signals and emergency equipment, including pyrotechnic distress signals 
and line throwing equipment, must be stowed in watertight containers or 
wood lined magazine chests.
    (2) All pyrotechnic distress signals, rockets, and line throwing 
guns must be stowed in accordance with the requirements of 49 CFR 
176.140 through 176.146.

[CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 92-100, 59 FR 
17001, Apr. 11, 1994; CGD 97-057, 62 FR 51048, Sept. 30, 1997; USCG-
2013-0671, 78 FR 60154, Sept. 30, 2013]



Sec.  147.100  Radioactive materials.

    (a) Radioactive materials must not be brought on board, used in any 
manner, or stored on the vessel, unless the use of the materials is 
authorized by a current license issued by the Nuclear Regulatory 
Commission (NRC) under 10 CFR parts 30 and 34.
    (b) Stowage of radioactive materials must conform to the 
requirements of the NRC license.



Sec.  147.105  Anesthetics, drugs, and medicines.

    Anesthetics, drugs, and medicines must be stowed and dispensed in 
accordance with the DHHS Publication No. (PHS) 84-2024.



PART 147A_INTERIM REGULATIONS FOR SHIPBOARD FUMIGATION-
-Table of Contents



                                 General

Sec.
147A.1 Purpose.
147A.3 Applicability.
147A.5 General requirement.
147A.6 Right of appeal
147A.7 Definitions.
147A.9 Persons in charge of fumigation and the vessel; designation.
147A.10 Notice to Captain of the Port.

                            Before Fumigation

147A.11 Person in charge of fumigation; before fumigation.
147A.13 Person in charge of the vessel; before fumigation.

                            During Fumigation

147A.21 Person in charge of fumigation; during fumigation.
147A.23 Person in charge of vessel; during fumigation.
147A.25 Entry.

                            After Ventilation

147A.31 Removal of fumigation material and warning signs.

              Special Requirements for Flammable Fumigants

147A.41 Person in charge of fumigation; flammable fumigants.
147A.43 Other sources of ignition; flammable fumigants.

    Authority: 46 U.S.C. 5103; Department of Homeland Security 
Delegation No. 0170.1.

    Source: CGD 74-144, 39 FR 32998, Sept. 13, 1974, unless otherwise 
noted.

[[Page 59]]

                                 General



Sec.  147A.1  Purpose.

    The purpose of this part is to prescribe the requirements for 
shipboard fumigation that are critical for the health and safety of the 
crew and any other person who is on board a vessel during fumigation. 
These are interim rules pending further study and promulgation of 
comprehensive regulations on shipboard fumigation.



Sec.  147A.3  Applicability.

    This part prescribes the rules for shipboard fumigation on vessels 
to which 49 CFR parts 171-179 apply under 49 CFR 176.5.

[CGD 86-033, 53 FR 36026, Sept. 16, 1988]



Sec.  147A.5  General requirement.

    No person may cause or authorize shipboard fumigation contrary to 
the rules in this part.



Sec.  147A.6  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 50381, Dec. 6, 1989]



Sec.  147A.7  Definitions.

    As used in this part:
    (a) Qualified person means a person who has experience with the 
particular fumigant or knowledge of its properties and is familiar with 
fumigant detection equipment and procedures, or an applicator who is 
certified by the Environmental Protection Agency if his certification 
covers the fumigant that is used.
    (b) Fumigant means a substance or mixture of substances that is a 
gas or is rapidly or progressively transformed to the gaseous state 
though some nongaseous or particulate matter may remain in the space 
that is fumigated.
    (c) Fumigation means the application of a fumigant on board a vessel 
to a specific treatment space.



Sec.  147A.9  Persons in charge of fumigation and the vessel; designation.

    (a) The person, including any individual, firm, association, 
partnership, or corporation, that is conducting a fumigation operation 
shall designate a person in charge of fumigation for each operation.
    (b) The operator of each vessel shall designate a person in charge 
of the vessel for each fumigation operation.



Sec.  147A.10  Notice to Captain of the Port.

    Unless otherwise authorized by the Captain of the Port, at least 24 
hours before fumigation the operator of the vessel shall notify the 
Coast Guard Captain of the Port, for the area where the vessel is to be 
fumigated, of the time and place of the fumigation, and the name of the 
vessel that is to be fumigated.

                            Before Fumigation



Sec.  147A.11  Person in charge of fumigation; before fumigation.

    (a) The person in charge of fumigation shall notify the person in 
charge of the vessel of:
    (1) The space that is to be fumigated;
    (2) The name, address, and emergency telephone number of the 
fumigation company;
    (3) The dates and times of fumigation;
    (4) The characteristics of the fumigant;
    (5) The spaces that are determined to be safe for occupancy 
paragraph (b)(1)(i) of this section;
    (6) The maximum allowable concentration of fumigant in spaces, if 
any, that are determined to be safe for occupancy under paragraph 
(b)(1)(i) of this section;
    (7) The symptoms of exposure to the fumigant; and
    (8) Emergency first aid treatment for exposure to the fumigant.
    (b) The person in charge of fumigation shall ensure that:
    (1) A marine chemist or other qualified person who has knowledge of 
and experience in shipboard fumigation evaluates the vessel's 
construction and configuration and determines:
    (i) Which spaces, if any, are safe for occupancy during fumigation; 
and
    (ii) The intervals that inspections must be made under Sec.  
147A.21(a)(1);
    (2) No persons or domestic animals are in the space that is to be 
fumigated

[[Page 60]]

or the spaces that are designated as unsafe for occupancy under 
paragraph (b)(1)(i) of this section;
    (3) There is proper and secure sealing to confine the fumigant to 
the space that is to be fumigated, including blanking off and sealing 
any ventilation ducts and smoke detectors;
    (4) The personal protection and fumigation detection equipment for 
the fumigant that is to be used is on board the vessel;
    (5) Warning signs are:
    (i) Posted upon all gangplanks, ladders, and other points of access 
to the vessel;
    (ii) Posted on all entrances to the spaces that are designated as 
unsafe for occupancy under paragraph (b)(1)(i) of this section; and
    (iii) In accordance with 49 CFR 173.9(c) or section 8.10 of the 
General Introduction of the International Maritime Dangerous Goods Code. 
The word ``unit'' on the warning sign may be replaced with ``vessel,'' 
``barge,'' ``hold,'' or ``space,'' as appropriate.
    (6) Watchmen are stationed at all entrances to:
    (i) Spaces that are not determined to be safe for occupancy under 
paragraph (b)(1)(i) of this section; or
    (ii) The vessel, if no spaces are determined to be safe for 
occupancy under paragraph (b)(1)(i) of this section.

[CGD 74-144, 39 FR 32998, Sept. 13, 1974; 39 FR 37771, Oct. 24, 19745; 
CGD 96-041, 61 FR 50731, Sept. 27, 1996; CGD 97-057, 62 FR 51048, Sept. 
30, 1997]



Sec.  147A.13  Person in charge of the vessel; before fumigation.

    (a) After notice under Sec.  147A.11 (a)(5), the person in charge of 
the vessel shall notify the crew and all other persons on board the 
vessel who are not participating in the fumigation of the spaces that 
are determined to be safe for occupancy under Sec.  147A.11(b)(1)(i).
    (b) If no spaces are determined to be safe for occupancy under Sec.  
147A.11 (b)(1)(i), the person in charge of the vessel shall ensure that 
the crew and all persons who are not participating in the fumigation 
leave the vessel and remain away during fumigation.

                            During Fumigation



Sec.  147A.21  Person in charge of fumigation; during fumigation.

    (a) Until ventilation begins, or until the vessel leaves port, the 
person in charge of fumigation shall ensure that a qualified person 
inspects the vessel as follows:
    (1) He must use detection equipment for the fumigant that is used to 
ensure that the fumigant is confined to:
    (i) The space that is fumigated, if partial occupancy is allowed 
under Sec.  147A.11(b)(1)(i); or
    (ii) The vessel, if no space is determined to be safe for occupancy 
under Sec.  147A.11(b)(1)(i).
    (2) He must make inspections at the intervals that are determined to 
be necessary by the marine chemist or qualified person under Sec.  
147A.11 (b)(1)(ii).
    (b) If leakage occurs, the person in charge of fumigation shall:
    (1) Notify the person in charge of the vessel that there is leakage;
    (2) Ensure that all necessary measures are taken for the health and 
safety of any person; and
    (3) Notify the person in charge of the vessel when there is no 
danger to the health and safety of any person.
    (c) After the exposure period, if the vessel is in port, the person 
in charge of fumigation shall ensure that fumigators or other qualified 
persons ventilate the space that is fumigated as follows:
    (1) Hatch covers and vent seals must be removed, other routes of 
access to the atmosphere must be opened, and if necessary, mechanical 
ventilation must be used.
    (2) Personal protection equipment that is appropriate for the 
fumigant that is used must be worn.
    (d) If ventilation is completed before the vessel leaves port, the 
person in charge of fumigation shall:
    (1) Ensure that a qualified person, who is wearing the personal 
protection equipment for the fumigant that is used if remote detection 
equipment is not used, tests the space that is fumigated and determines 
if there is any danger to the health and safety of any

[[Page 61]]

person, including a danger from fumigant that may be retained in bagged, 
baled, or other absorbent cargo;
    (2) Notify the person in charge of the vessel of this determination; 
and
    (3) If it is determined that there is a danger:
    (i) Ensure that all measures are taken that are necessary for the 
health and safety of all persons; and
    (ii) Notify the person in charge of the vessel when there is no 
danger to the health and safety of any person.



Sec.  147A.23  Person in charge of vessel; during fumigation.

    (a) The person in charge of the vessel shall ensure that the crew 
and all other persons on board the vessel who are not participating in 
the fumigation restrict their movement during fumigation to the spaces 
that are determined to be safe for occupancy under Sec.  
147A.11(b)(1)(i).
    (b) The person in charge of the vessel shall ensure that the crew 
and all other persons who are not participating in the fumigation follow 
any instructions of the person in charge of fumigation that are issued 
under Sec.  147A.21(b)(2) or (d)(3)(i) and that the vessel does not 
leave port if he is notified under:
    (1) Section 147A.21(b)(1) that there is leakage, unless the person 
in charge of fumigation notifies him under Sec.  147A.21(b)(3) of this 
subpart that there is no danger; or
    (2) Section 147A.21(d)(2) that there is a danger after ventilation, 
unless the person in charge of the fumigation notifies him under Sec.  
147A.21(d)(3)(ii) that there is no danger.
    (c) If fumigation is not completed before the vessel leaves port, 
the person in charge of the vessel shall ensure that personal protection 
and fumigant detection equipment for the fumigant that is used is on 
board the vessel.
    (d) If the vessel leaves port before fumigation is completed, the 
person in charge of the vessel shall ensure that a qualified person 
makes periodic inspections until ventilation is completed and this 
person shall use detection equipment for the fumigant that is used to 
determine if:
    (1) There is leakage of fumigant; or
    (2) There is a concentration of fumigant that is a danger to the 
health and safety of any person.
    (e) If the qualified person determines under paragraph (d) of this 
section that there is leakage or a concentration of fumigant that is a 
danger to the health and safety of any person, the person in charge of 
the vessel shall take all measures that are, in his discretion, 
necessary to ensure health and safety of all persons who are on board 
the vessel. If the danger is due to leakage, he shall also ensure that 
qualified persons immediately ventilate in accordance with paragraphs 
(c)(1) and (2) of Sec.  147A.21.
    (f) If the vessel leaves port during the exposure period, the person 
in charge of the vessel shall ensure that the space that is fumigated is 
ventilated by qualified persons after the exposure period in accordance 
with paragraphs (c) (1) and (2) of Sec.  147A.21.
    (g) If ventilation is completed after the vessel leaves port, the 
person in charge of the vessel shall ensure that a qualified person, who 
is wearing the personal protection equipment for the fumigant that is 
used if remote detection equipment is not used, tests the space that is 
fumigated to determine if there is a danger to the health and safety of 
any person, including a danger from fumigant that may be retained in 
bagged, baled, or other absorbent cargo. If the qualified person 
determines that there is a danger, the person in charge of the vessel 
shall take all measures that are, in his discretion, necessary to ensure 
the health and safety of all persons who are on board the vessel.



Sec.  147A.25  Entry.

    (a) No person may enter the spaces that immediately adjoin the space 
that is fumigated during fumigation unless entry is for emergency 
purposes or the space is tested and declared safe for human occupancy by 
a marine chemist or other qualified person and is inspected under Sec.  
147A.21(a)(2) or Sec.  147A.23(d).
    (b) If entry is made for emergency purposes:
    (1) No person may enter the space that is fumigated or any adjoining 
spaces during fumigation unless he

[[Page 62]]

wears the personal protection equipment for the fumigant that is in use;
    (2) No person may enter the space that is fumigated unless the entry 
is made by a two person team; and
    (3) No person may enter the space that is fumigated unless he wears 
a lifeline and safety harness and each life-line is tended by a person 
who is outside the space and who is wearing the personal protection 
equipment for the fumigant that is in use.

                            After Ventilation



Sec.  147A.31  Removal of fumigation material and warning signs.

    After ventilation is completed and a marine chemist or other 
qualified person determines that there is no danger to the health and 
safety of any person under Sec.  147A.21(d) or Sec.  147A.23(g), the 
person in charge of fumigation, or, if the vessel has left port, the 
person in charge of the vessel, shall ensure that all warning signs are 
removed and fumigation containers and materials are removed and disposed 
of in accordance with the manufacturer's recommendations.

              Special Requirements for Flammable Fumigants



Sec.  147A.41  Person in charge of fumigation; flammable fumigants.

    (a) The person in charge of fumigation shall ensure that:
    (1) Before the space that is to be fumigated is sealed, it is 
thoroughly cleaned, and all refuse, oily waste, and other combustible 
material is removed;
    (2) Before fumigation, all fire fighting equipment, including 
sprinklers and fire pumps, is in operating condition; and
    (3) Before and during fumigation, electrical circuits that are in 
the space that is fumigated are de-energized.
    (b) [Reserved]



Sec.  147A.43  Other sources of ignition; flammable fumigants.

    While the space that is fumigated is being sealed or during 
fumigation, no person may use matches, smoking materials, fires, open 
flames, or any other source of ignition in any spaces that are not 
determined to be safe for occupancy under Sec.  147A.11(b)(1)(i).



PART 148_CARRIAGE OF BULK SOLID MATERIALS THAT REQUIRE SPECIAL
HANDLING--Table of Contents



                            Subpart A_General

Sec.
148.1 Purpose and applicability.
148.2 Responsibility and compliance.
148.3 Definitions.
148.5 Alternative procedures.
148.7 OMB control numbers assigned under the Paperwork Reduction Act.
148.8 Incorporation by reference.
148.9 Right of appeal.
148.10 Permitted materials.
148.11 Hazardous or potentially dangerous characteristics.
148.12 Assignment and certification.

                        Subpart B_Special Permits

148.15 Petition for a special permit.
148.20 Deadlines for submission of petition and related requests.
148.21 Necessary information.
148.25 Activities covered by a special permit.
148.26 Standard conditions for special permits.
148.30 Records of special permits issued.

              Subpart C_Minimum Transportation Requirements

148.50 Cargoes subject to this subpart.
148.51 Temperature readings.
148.55 International shipments.
148.60 Shipping papers.
148.61 Emergency response information.
148.62 Location of shipping papers and emergency response information.
148.70 Dangerous cargo manifest; general.
148.71 Information included in the dangerous cargo manifest.
148.72 Dangerous cargo manifest; exceptions.
148.80 Supervision of cargo transfer.
148.85 Required equipment for confined spaces.
148.86 Confined space entry.
148.90 Preparations before loading.
148.100 Log book entries.
148.110 Procedures followed after unloading.
148.115 Report of incidents.

                    Subpart D_Stowage and Segregation

148.120 Stowage and segregation requirements.
148.125 Stowage and segregation for materials of Class 4.1.
148.130 Stowage and segregation for materials of Class 4.2.
148.135 Stowage and segregation for materials of Class 4.3.

[[Page 63]]

148.140 Stowage and segregation for materials of Class 5.1.
148.145 Stowage and segregation for materials of Class 7.
148.150 Stowage and segregation for materials of Class 9.
148.155 Stowage and segregation for potentially dangerous materials.

          Subpart E_Special Requirements for Certain Materials

148.200 Purpose.
148.205 Ammonium nitrate and ammonium nitrate fertilizers.
148.220 Ammonium nitrate-phosphate fertilizers.
148.225 Calcined pyrites (pyritic ash, fly ash).
148.227 Calcium nitrate fertilizers.
148.230 Calcium oxide (lime, unslaked).
148.235 Castor beans.
148.240 Coal.
148.242 Copra.
148.245 Direct reduced iron (DRI); lumps, pellets, and cold-molded 
          briquettes.
148.250 Direct reduced iron (DRI); hot-molded briquettes.
148.255 Ferrosilicon, aluminum ferrosilicon, and aluminum silicon 
          containing more than 30% but less than 90% silicon.
148.260 Ferrous metal.
148.265 Fish meal or fish scrap.
148.270 Hazardous substances.
148.275 Iron oxide, spent; iron sponge, spent.
148.280 Magnesia, unslaked (lightburned magnesia, calcined magnesite, 
          caustic calcined magnesite).
148.285 Metal sulfide concentrates.
148.290 Peat moss.
148.295 Petroleum coke, calcined or uncalcined, at 55 [deg]C (131 
          [deg]F) or above.
148.300 Radioactive materials.
148.310 Seed cake.
148.315 Sulfur.
148.320 Tankage; garbage tankage; rough ammonia tankage; or tankage 
          fertilizer.
148.325 Wood chips; wood pellets; wood pulp pellets.
148.330 Zinc ashes; zinc dross; zinc residues; zinc skimmings.

                Subpart F_Additional Special Requirements

148.400 Applicability.
148.405 Sources of ignition.
148.407 Smoking.
148.410 Fire hoses.
148.415 Toxic gas analyzers.
148.420 Flammable gas analyzers.
148.435 Electrical circuits in cargo holds.
148.445 Adjacent spaces.
148.450 Cargoes subject to liquefaction.

    Authority: 33 U.S.C. 1602; E.O. 12234, 45 FR 58801, 3 CFR, 1980 
Comp., p. 277; 46 U.S.C. 3306, 5111; 49 U.S.C. 5103; Department of 
Homeland Security Delegation No. 0170.1.

    Source: 75 FR 64591, Oct. 19, 2010, unless otherwise noted.

    Editorial Note: Nomenclature changes to part 148 appear by USCG-
2012-0832, 77 FR 59783, Oct. 1, 2012.



                            Subpart A_General



Sec.  148.1  Purpose and applicability.

    (a) This part prescribes special handling procedures for certain 
solid materials that present hazards when transported in bulk by vessel.
    (b) Except as noted in paragraph (c) of this section, this part 
applies to all domestic and foreign vessels in the navigable waters of 
the United States that transport bulk solid materials requiring special 
handling.
    (c) This part does not apply to an unmanned barge on a domestic 
voyage carrying a Potentially Dangerous Material (PDM) found in Table 
148.10 of this part. All barges on international voyages must follow the 
requirements for PDM.
    (d) The regulations in this part have preemptive impact over State 
law on the same subject. The Coast Guard has determined, after 
considering the factors developed by the Supreme Court in U.S. v. Locke, 
529 U.S. 89 (2000), that in directing the Secretary to regulate the safe 
transportation of hazardous material and the safety of individuals and 
property on board vessels subject to inspection, as well as the 
provision of loading information, Congress intended to preempt the field 
of safety standards for solid materials requiring special handling when 
transported in bulk on vessels.



Sec.  148.2  Responsibility and compliance.

    Each master of a vessel, person in charge of a barge, owner, 
operator, shipper, charterer, or agent must ensure compliance with this 
part. These persons are also responsible for communicating requirements 
to every person performing any function covered by this part.



Sec.  148.3  Definitions.

    As used in this part--
    A-60 class division means a division as defined in Sec.  32.57-5 of 
this chapter.

[[Page 64]]

    Adjacent space means any enclosed space on a vessel, such as a cargo 
hold, cargo compartment, accommodation space, working space, storeroom, 
passageway, or tunnel, that shares a common bulkhead or deck with a 
hatch, door, scuttle, cable fitting or other penetration, with a cargo 
hold or compartment containing a material listed in Table 148.10 of this 
part.
    Away from means a horizontal separation of at least 3 meters (10 
feet) projected vertically is maintained between incompatible materials 
carried in the same hold or on deck.
    Bulk applies to any solid material, consisting of a combination of 
particles, granules, or any larger pieces of material generally uniform 
in composition, that is loaded directly into the cargo spaces of a 
vessel without any intermediate form of containment.
    Bulk Cargo Shipping Name or BCSN identifies a bulk solid material 
during transport by sea. When a cargo is listed in this Part, the BCSN 
of the cargo is identified by Roman type and is listed in Column 1 of 
Table 148.10 of this part. When the cargo is a hazardous material, as 
defined in 49 CFR part 173, the proper shipping name of that material is 
the BCSN.
    Cold-molded briquettes are briquettes of direct reduced iron (DRI) 
that have been molded at a temperature of under 650 [deg]C (1,202 
[deg]F) or that have a density of under 5.0 g/cm\3\;.
    Commandant (CG-ENG-5) means the Chief, Hazardous Materials Division 
of the Office of Design and Engineering Systems. The mailing address is: 
Commandant (CG-ENG-5), Attn: Hazardous Materials Division, U.S. Coast 
Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 
20593-7509; telephone 202-372-1420 or email [email protected].
    Compartment means any space on a vessel that is enclosed by the 
vessel's decks and its sides or permanent steel bulkheads.
    Competent authority means a national agency responsible under its 
national law for the control or regulation of a particular aspect of the 
transportation of hazardous materials.
    Confined space means a cargo hold containing a material listed in 
Table 148.10 of this part or an adjacent space not designed for human 
occupancy.
    Domestic voyage means transportation between places within the 
United States other than through a foreign country.
    Hazard class means the category of hazard assigned to a material 
under this part and 49 CFR parts 171 through 173.

                        Hazard Class Definitions

 Hazard Classes Used in This Part Are Defined in the Following Sections
                               of Title 49
------------------------------------------------------------------------
                Division No. (if                              Reference
  Class No.           any)                Description          (49 CFR)
------------------------------------------------------------------------
1............  1.1, 1.2, 1.3,      Explosives..............         Sec.
                1.4, 1.5, 1.6.                                    173.50
2............  2.1, 2.2, 2.3.....  Flammable Gas, Non-              Sec.
                                    Flammable Compressed         173.115
                                    Gas, Poisonous Gas.
3............  ..................  Flammable and                    Sec.
                                    Combustible Liquid.          173.120
4............  4.1, 4.2, 4.3.....  Flammable Solid,                 Sec.
                                    Spontaneously                173.124
                                    Combustible Material,
                                    Dangerous When Wet
                                    Material.
5............  5.1...............  Oxidizer................         Sec.
                                                                 173.127
5............  5.2...............  Organic Peroxide........         Sec.
                                                                 173.128
6............  6.1...............  Poisonous Materials.....         Sec.
                                                                 173.132
6............  6.2...............  Infectious Substance....         Sec.
                                                                 173.134
7............  ..................  Radioactive Material....         Sec.
                                                                 173.403
8............  ..................  Corrosive Material......         Sec.
                                                                 173.136
9............  ..................  Miscellaneous Hazardous          Sec.
                                    Material.                    173.140
------------------------------------------------------------------------

    Hazardous substance is a hazardous substance as defined in 49 CFR 
171.8.
    Hold means a compartment below deck that is used exclusively for the 
stowage of cargo.
    Hot-molded briquettes are briquettes of DRI that have been molded at 
a temperature of 650 [deg]C (1,202 [deg]F) or higher, and that have a 
density of 5.0 g/cm\3\ (312 lb/ft\3\) or greater.

[[Page 65]]

    IMSBC Code means the English version of the ``International Maritime 
Solid Bulk Cargoes Code'' published by the International Maritime 
Organization (incorporated by reference, see Sec.  148.8).
    Incompatible materials means two materials whose stowage together 
may result in undue hazards in the case of leakage, spillage, or other 
accident.
    International voyage means voyages--
    (1) Between any place in the United States and any place in a 
foreign country;
    (2) Between places in the United States through a foreign country; 
or
    (3) Between places in one or more foreign countries through the 
United States.
    Lower flammability limit or LFL means the lowest concentration of a 
material or gas that will propagate a flame. The LFL is usually 
expressed as a percent by volume of a material or gas in air.
    Master means the officer having command of a vessel. The functions 
assigned to the master in this part may also be performed by a 
representative of the master or by a person in charge of a barge.
    Material safety data sheet or MSDS is as defined in 29 CFR 
1910.1200.
    Person in charge of a barge means an individual designated by the 
owner or operator of a barge to have charge of the barge.
    Potentially Dangerous Material or PDM means a material that does not 
fall into a particular hazard class but can present a danger when 
carried in bulk aboard a vessel. The dangers often result from the 
material's tendency to self-heat or cause oxygen depletion. Materials 
that present a potential danger due solely to their tendency to shift in 
the cargo hold are not PDMs. For international shipments prepared in 
accordance with the IMSBC Code (incorporated by reference, see Sec.  
148.8), equivalent terminology to PDM is Material Hazardous only in Bulk 
(MHB).
    Readily combustible material means a material that may not be a 
hazardous material but that can easily ignite and support combustion. 
Examples are wood, straw, vegetable fibers, and products made from these 
materials, and coal lubricants and oils. The term does not include 
packaging material or dunnage.
    Reportable quantity or RQ means the quantity of a hazardous 
substance spilled or released that requires a report to the National 
Response Center. The specific RQs for each hazardous substance are 
available in 49 CFR 172.101, Appendix A.
    Responsible person means a knowledgeable person who the master of a 
vessel or owner or operator of a barge makes responsible for all 
decisions relating to his or her specific task.
    Seed cake means the residue remaining after vegetable oil has been 
extracted by a solvent or mechanical process from oil-bearing seeds, 
such as coconuts, cotton seed, peanuts, and linseed.
    Shipper means any person by whom, or in whose name, or on whose 
behalf, a contract of carriage of goods by sea has been concluded with a 
carrier; or any person by whom or in whose name, or on whose behalf, the 
goods are actually delivered to the carrier in relation to the contract 
of carriage by sea.
    Shipping paper means a shipping order, bill of lading, manifest, or 
other shipping document serving a similar purpose.
    Stowage factor means the volume in cubic meters of 1,000 kilograms 
(0.984 long tons) of a bulk solid material.
    Threshold limit value or TLV means the time-weighted average 
concentration of a material that the average worker can be exposed to 
over a normal eight-hour working day, day after day, without adverse 
effect. This is a trademark term of the American Conference of 
Governmental Industrial Hygienists (ACGIH).
    Transported includes the various operations associated with cargo 
transportation, such as loading, off-loading, handling, stowing, 
carrying, and conveying.
    Trimming means any leveling of a cargo within a cargo hold or 
compartment, either partial or total.
    Tripartite agreement means an agreement between the national 
administrations of the port of loading, the port of discharge, and the 
flag state of the vessel, on the conditions of carriage of a cargo.

[[Page 66]]

    Ventilation means exchange of air from outside to inside a cargo 
space and includes the following types:
    (1) Continuous ventilation means ventilation that is operating at 
all times. Continuous ventilation may be either natural or mechanical;
    (2) Mechanical ventilation means power-generated ventilation;
    (3) Natural ventilation means ventilation that is not power-
generated; and
    (4) Surface ventilation means ventilation of the space above the 
cargo. Surface ventilation may be either natural or mechanical.
    Vessel means a cargo ship or barge.

[75 FR 64591, Oct. 19, 2010, as amended by USCG-2013-0671, 78 FR 60154, 
Sept. 30, 2013]



Sec.  148.5  Alternative procedures.

    (a) The Commandant (CG-ENG-5) may authorize the use of an 
alternative procedure, including exemptions to the IMSBC Code 
(incorporated by reference, see Sec.  148.8), in place of any 
requirement of this part if it is demonstrated to the satisfaction of 
the Coast Guard that the requirement is impracticable or unnecessary and 
that an equivalent level of safety can be maintained.
    (b) Each request for authorization of an alternative procedure 
must--
    (1) Be in writing;
    (2) Name the requirement for which the alternative is requested; and
    (3) Contain a detailed explanation of--
    (i) Why the requirement is impractical or unnecessary; and
    (ii) How an equivalent level of safety will be maintained.



Sec.  148.7  OMB control numbers assigned under the Paperwork Reduction Act.

    The information collection requirements in this part are approved by 
the Office of Management and Budget, and assigned OMB control number 
1625-0025.



Sec.  148.8  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 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 is available for inspection at the 
National Archives and Records Administration (NARA). For information on 
the availability of this material at NARA, call 202-741-6030 or go to 
http://www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html. Also, it is available for inspection at the Coast 
Guard Headquarters. Contact Commandant (CG-ENG-5), Attn: Hazardous 
Materials Division, U.S. Coast Guard Stop 7509, 2703 Martin Luther King 
Jr. Avenue SE., Washington, DC 20593-7509. The material is also 
available from the sources listed in paragraphs (b) and (c) of this 
section.
    (b) International Maritime Organization (IMO), 4 Albert Embankment, 
London SE1 7SR, United Kingdom, + 44 (0)20 7735 7611, http://
www.imo.org.
    (1) International Maritime Solid Bulk Cargoes Code and Supplement, 
2009 edition (``IMSBC Code''), incorporation by reference, excluding 
supplemental materials, approved for Sec. Sec.  148.3; 148.5(a); 
148.15(d); 148.55(b); 148.205(b); 148.220(b) and (c); 148.240(h); 
148.450(a), (d), and (g).
    (2) [Reserved]
    (c) United Nations Publications, 2 United Nations Plaza, Room DC2-
853, Dept. C089, New York, NY 10017, (800) 253-9646, http://unp.un.org.
    (1) Recommendations on the Transport of Dangerous Goods, Manual of 
Tests and Criteria, Fifth revised edition (2009) (``UN Manual of Tests 
and Criteria''), incorporation by reference approved for Sec. Sec.  
148.205(b); 148.220(b) and (c).
    (2) [Reserved]

[75 FR 64591, Oct. 19, 2010, as amended by USCG-2013-0671, 78 FR 60154, 
Sept. 30, 2013]



Sec.  148.9  Right of appeal.

    Any person directly affected by enforcement of this part by or on 
behalf of the Coast Guard may appeal the decision or action under 
Subpart 1.03 of this chapter.



Sec.  148.10  Permitted materials.

    (a) A material listed in Table 148.10 of this section may be 
transported as a

[[Page 67]]

bulk solid cargo on a vessel if it is carried according to this part. A 
material that is not listed in Table 148.10 of this section, but which 
is hazardous or a Potentially Dangerous Material (PDM), requires a 
Special Permit under Sec.  148.15 of this part to be transported on the 
navigable waters of the United States.
    (b) For each listed material, Table 148.10 identifies the hazard 
class and gives the BCSN or directs the user to the preferred BCSN. In 
addition, the table lists specific hazardous or potentially dangerous 
characteristics associated with each material and specifies or 
references detailed special requirements in this part pertaining to the 
stowage or transport of specific bulk solid materials. The column 
descriptions for Table 148.10 are defined as follows:
    (1) Column 1: Bulk Solid Material Descriptions and Bulk Cargo 
Shipping Names (BCSN). Column 1 lists the bulk solid material 
descriptions and the BCSNs of materials designated as hazardous or PDM. 
BCSNs are limited to those shown in Roman type. Trade names and 
additional descriptive text are shown in italics.
    (2) Column 2: I.D. Number. Column 2 lists the identification number 
assigned to each BCSN associated with a hazardous material. Those 
preceded by the letters ``UN'' are associated with BCSNs considered 
appropriate for international voyages as well as domestic voyages. Those 
preceded by the letters ``NA'' are associated with BCSNs not recognized 
for international voyages, except to and from Canada.
    (3) Column 3: Hazard Class or Division. Column 3 designates the 
hazard class or division, or PDM, as appropriate, corresponding to each 
BCSN.
    (4) Column 4: References. Column 4 refers the user to the preferred 
BCSN corresponding to bulk solid material descriptions listed in Column 
1.
    (5) Column 5: Hazardous or Potentially Dangerous Characteristics. 
Column 5 specifies codes for hazardous or potentially dangerous 
characteristics applicable to specific hazardous materials or PDMs. 
Refer to Sec.  148.11 of this part for the meaning of each code.
    (6) Column 6: Other Characteristics. Column 6 contains other 
pertinent characteristics applicable to specific bulk solid materials 
listed in Column 1.
    (7) Column 7: Special Requirements. Column 7 specifies the 
applicable sections of Part 148 of this chapter that contain detailed 
special requirements pertaining to stowage and/or transportation of 
specific bulk solid materials in this part. This column is completed in 
a manner which indicates that ``Sec.  148.'' precedes the designated 
numerical entry.
    (c) The following requirements apply to combinations of bulk solids 
carried at the same time and in the same compartment or hold:

------------------------------------------------------------------------
  Combinations of bulk solid materials             Requirements
------------------------------------------------------------------------
(1) Material listed in Table 148.10      Requirements specified in Table
 carried with any other non-hazardous     148.10 for the listed
 bulk solid material.                     material.
(2) Material carried under Special       Requirements specified in the
 Permit with any non-hazardous bulk       Special Permit.
 solid material.
(3) Two or more materials listed in      Must apply for a Special
 Table 148.10.                            Permit.
------------------------------------------------------------------------

    (d) An owner, agent, master, operator, or person in charge of a 
vessel or barge carrying materials listed in Table 148.10 of this 
section must follow the requirements contained in 46 CFR part 4 for 
providing notice and reporting of marine casualties and retaining voyage 
records.

[[Page 68]]



                                                   Table 148.10--Bulk Solid Hazardous Materials Table
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                              Hazardous or
                                                                                               potentially                                    Special
 Bulk solid material descriptions and                 Hazard                                    dangerous                                  requirements
       bulk cargo shipping names         I.D. No.    class or           References           characteristics     Other characteristics     (Sec.   148.*
                                                     division                                   (see Sec.                                      * *)
                                                                                                 148.11)
--------------------------------------------------------------------------------------------------------------------------------------------------------
(1)                                           (2)          (3)  (4)......................                 (5)  (6)......................             (7)
--------------------------------------------------------------------------------------------------------------------------------------------------------
Aluminum Ferrosilicon Powder..........     UN1395     4.3, 6.1  .........................                2, 3  Fine powder or briquettes       135, 255,
                                                                                                                                            405(b), 407,
                                                                                                                                           415(a) & (e),
                                                                                                                                             420(b), 445
Aluminum Nitrate......................     UN1438          5.1  .........................                   4  Colorless or white                    140
                                                                                                                crystals.
Aluminum Silicon Powder, Uncoated.....     UN1398          4.3  .........................                2, 3  .........................       135, 255,
                                                                                                                                             405(b), 407
                                                                                                                                           415(a) & (e),
                                                                                                                                             420(b), 445
Aluminum Smelting By-products or           UN3170          4.3  .........................             1, 2, 3  Includes aluminum dross,     135, 405(b),
 Aluminum Re-melting Byproducts.                                                                                residues, spent              420(b), 445
                                                                                                                cathodes, spent
                                                                                                                potliner, and skimmings.
Ammonium Nitrate......................     UN1942          5.1  .........................               5, 27  .........................       140, 205,
                                                                                                                                            405(a), 407,
                                                                                                                                                     410
Ammonium Nitrate Based Fertilizer.....     UN2067          5.1  .........................               5, 27  .........................       140, 205,
                                                                                                                                            405(a), 407,
                                                                                                                                                     410
Ammonium Nitrate Based Fertilizer.....     UN2071            9  .........................                   6  Nitrogen, Phosphate, or         140, 220,
                                                                                                                Potash.                      405(a), 407
Barium Nitrate........................     UN1466     5.1, 6.1  .........................                4, 7  .........................             140
Brown Coal Briquettes.................  .........          PDM  .........................      11, 12, 14, 25  .........................       155, 240,
                                                                                                                                            405(b), 407,
                                                                                                                                                 415(b),
                                                                                                                                             420(a), 445
Calcium fluoride......................  .........  ...........  See Fluorospar...........  ..................  .........................
Calcium Nitrate.......................     UN1454          5.1  .........................                   4  White crystals or powder.        140, 227
Calcium Oxide.........................  .........  ...........  See Lime, Unslaked.......  ..................  .........................
Castor Beans..........................     UN2969            9  .........................                  10  Whole beans..............        150, 235
Charcoal..............................  .........          PDM  .........................           1, 11, 12  Screenings, briquettes...             155
Chili Saltpeter.......................  .........  ...........  See Sodium Nitrate.......  ..................  .........................
Chilean Natural Nitrate...............  .........  ...........  See Sodium Nitrate.......  ..................  .........................
Coal..................................  .........          PDM  .........................  11, 12, 13, 14, 25  .........................       155, 240,
                                                                                                                                            405(b), 407,
                                                                                                                                          415(b), 420(a)
                                                                                                                                             & (c), 445,
                                                                                                                                                     450
Copra.................................     UN1363          4.2  .........................              11, 12  Dry......................        130, 242
Direct reduced iron (A) with not more   .........          PDM  .........................            1, 2, 12  Hot-molded briquettes....       155, 250,
 than 5% fines.                                                                                                                                   420(b)
Direct reduced iron (B) with not more   .........          PDM  .........................            1, 2, 12  Lumps, pellets, and cold-       155, 245,
 than 5% fines.                                                                                                 molded briquettes.          405(b), 407,
                                                                                                                                             420(b), 445
Environmentally Hazardous Substances,      UN3077            9  Hazardous substances                       15  .........................        150, 270
 Solid, n.o.s..                                                  listed in 40 CFR part
                                                                 302.
Ferrophosphorous......................  .........          PDM  .........................                2, 3  Including briquettes.....    155, 415(e),
                                                                                                                                                     445

[[Page 69]]

 
Ferrosilicon with 30-90% silicon......     UN1408     4.3, 6.1  .........................                2, 3  .........................       135, 255,
                                                                                                                                            405(b), 407,
                                                                                                                                           415(a) & (e),
                                                                                                                                             420(b), 445
Ferrosilicon with 25%-30% silicon or    .........          PDM  .........................  ..................  .........................       155, 255,
 90% or more silicon.                                                                                                                       405(b), 407,
                                                                                                                                          415 (a) & (e),
                                                                                                                                             420(b), 445
Ferrous Sulfate.......................  .........  ...........  See Environmentally        ..................  .........................
                                                                 Hazardous Substances,
                                                                 Solid, n.o.s.
Ferrous Metal Borings, Shavings,           UN2793          4.2  .........................              11, 12  .........................        130, 260
 Turnings, or Cuttings.
Fish Meal Stabilized or Fish Scrap,        UN2216            9  .........................              11, 12  Ground and pelletized            150, 265
 Stabilized.                                                                                                    (mixture), anti-oxidant
                                                                                                                treated.
Fluorospar............................  .........          PDM  .........................               8, 24  .........................    155, 440(a),
                                                                                                                                                     450
Garbage Tankage.......................  .........  ...........  See Tankage..............  ..................  .........................
Iron Oxide, Spent or Iron Sponge,          UN1376          4.2  .........................       3, 11, 12, 14  .........................       130, 275,
 Spent.                                                                                                                                    415(c), (d) &
                                                                                                                                                (f), 445
Iron Swarf............................  .........  ...........  See Ferrous Metal          ..................  .........................
                                                                 Borings, Shavings,
                                                                 Turnings, or Cuttings.
Lead Nitrate..........................     UN1469     5.1, 6.1  .........................        4, 7, 22, 26  .........................        140, 270
Lignite...............................  .........  ...........  See Brown Coal Briquettes  ..................  .........................
Lime, Unslaked........................  .........          PDM  .........................                   1  .........................        155, 230
Linted Cotton Seed containing not more  .........          PDM  .........................              11, 12  .........................             155
 than 9% moisture and not more than
 20.5% oil.
Magnesia, Unslaked....................  .........          PDM  .........................                   1  Lightburned magnesia,            155, 280
                                                                                                                calcined magnesite.
Magnesium Nitrate.....................     UN1474          5.1  .........................                   4  .........................             140
Metal Sulfide Concentrates............  .........          PDM  .........................   8, 11, 12, 22, 24  Solid, finely divided       155, 285, 450
                                                                                                                sulfide concentrates of
                                                                                                                copper, iron, lead,
                                                                                                                nickel, zinc, or other
                                                                                                                metalliferous ores.
Peat Moss with moisture content of      .........          PDM  .........................   8, 12, 13, 14, 24  Fine to coarse fibrous      155, 290, 450
 more than 65% by weight.                                                                                       structure.
Pencil Pitch..........................  .........  ...........  See Pitch Prill..........  ..................  .........................

[[Page 70]]

 
Petroleum Coke calcined or uncalcined   .........          PDM  .........................                  11  .........................        155, 295
 at 55 [deg]C (131 [deg]F).
Pitch Prill...........................  .........          PDM  .........................              14, 16  .........................             155
Potassium Nitrate.....................     UN1486          5.1  .........................                   4  .........................             140
Prilled Coal Tar......................  .........  ...........  See Pitch Prill..........  ..................  .........................
Pyrites, Calcined.....................  .........          PDM  .........................            8, 9, 24  Fly ash..................   155, 225, 450
Pyritic ash...........................  .........  ...........  See Pyrites, Calcined....  ..................  .........................
Quicklime.............................  .........  ...........  See Lime, Unslaked.......  ..................  .........................
Radioactive Material..................     UN2912            7  .........................                  17  Low specific activity....        145, 300
Radioactive Material..................     UN2913            7  .........................                  17  Surface contaminated             145, 300
                                                                                                                objects.
Rough Ammonia Tankage.................  .........  ...........  See Tankage..............  ..................  .........................
Saltpeter.............................  .........  ...........  See Potassium Nitrate....  ..................  .........................
Sawdust...............................  .........          PDM  .........................              12, 18  .........................    155, 405(a),
                                                                                                                                                     407
Seed Cake.............................     UN1386          4.2  .........................              12, 19  Mechanically expelled or         130, 310
                                                                                                                solvent extractions.
Seed Cake.............................     UN2217          4.2  .........................              12, 19  Solvent extractions......        130, 310
Silicomanganese with silicon content    .........          PDM  .........................            2, 3, 12  With known hazard profile    155, 405(b),
 of 25% or more.                                                                                                or known to evolve gases.  407, 415(a) &
                                                                                                                                            (d), 420(b),
                                                                                                                                                     445
Sodium Nitrate........................     UN1498          5.1  .........................                   4  .........................             140
Sodium Nitrate and Potassium Nitrate       UN1499          5.1  .........................                   4  Mixtures prepared as                  140
 Mixture.                                                                                                       fertilizer.
Steel Swarf...........................  .........  ...........  See Ferrous Metal          ..................  .........................
                                                                 Borings, Shavings,
                                                                 Turnings, or Cuttings.
Sulfur................................     UN1350          4.1  .........................              14, 20  Lumps or coarse-grained         125, 315,
                                                                                                                powder.                     405(a), 407,
                                                                                                                                                     435
Sulfur................................     NA1350            9  .........................              14, 20  Not subject to the              125, 315,
                                                                                                                requirements of this        405(a), 407,
                                                                                                                subchapter when formed               435
                                                                                                                into specific shapes
                                                                                                                (i.e., prills, granules,
                                                                                                                pellets, pastiles, or
                                                                                                                flakes).
Tankage...............................  .........          PDM  .........................                  11  .........................        155, 320
Tankage Fertilizer....................  .........  ...........  See Tankage..............  ..................  .........................
Vanadium Ore..........................  .........          PDM  .........................                  21  .........................             155
Wood chips, Wood Pellets, Wood Pulp     .........          PDM  .........................                  12  .........................        155, 325
 Pellets.
Zinc Ashes............................     UN1435          4.3  .........................            2, 3, 23  Includes zinc dross,            135, 330,
                                                                                                                residues, and skimmings.    405(b), 407,
                                                                                                                                            420(b), 435,
                                                                                                                                                     445
--------------------------------------------------------------------------------------------------------------------------------------------------------


[[Page 71]]



Sec.  148.11  Hazardous or potentially dangerous characteristics.

    (a) General. When Column 5 refers to a code for a hazardous material 
or PDM, the meaning of that code is set forth in this section.
    (b) Table of Hazardous or Potentially Dangerous Characteristics.

----------------------------------------------------------------------------------------------------------------
                  Code                              Hazardous or potentially dangerous characteristic
----------------------------------------------------------------------------------------------------------------
1......................................  Contact with water may cause heating.
2......................................  Contact with water may cause evolution of flammable gases, which may
                                          form explosive mixtures with air.
3......................................  Contact with water may cause evolution of toxic gases.
4......................................  If involved in a fire, will greatly intensify the burning of
                                          combustible materials.
5......................................  A major fire aboard a vessel carrying this material may involve a risk
                                          of explosion in the event of contamination (e.g., by a fuel oil) or
                                          strong confinement. If heated strongly will decompose, giving off
                                          toxic gases that support combustion.
6......................................  These mixtures may be subject to self-sustaining decomposition if
                                          heated. Decomposition, once initiated, may spread throughout the
                                          remainder, producing gases that are toxic.
7......................................  Toxic if swallowed and by dust inhalation.
8......................................  Harmful and irritating by dust inhalation.
9......................................  Highly corrosive to steel.
10.....................................  Powerful allergen. Toxic by ingestion. Skin contact or inhalation of
                                          dust may cause severe irritation of skin, eyes, and mucous membranes
                                          in some people.
11.....................................  May be susceptible to spontaneous heating and ignition.
12.....................................  Liable to cause oxygen depletion in the cargo space.
13.....................................  Liable to emit methane gas which can form explosive mixtures with air.
14.....................................  Dust forms explosive mixtures with air.
15.....................................  May present substantial danger to the public health or welfare or the
                                          environment when released into the environment. Skin contact and dust
                                          inhalation should be avoided.
16.....................................  Combustible. Burns with dense black smoke. Dust may cause skin and eye
                                          irritation.
17.....................................  Radiation hazard from dust inhalation and contact with mucous
                                          membranes.
18.....................................  Susceptible to fire from sparks and open flames.
19.....................................  May self-heat slowly and, if wet or containing an excessive proportion
                                          of unoxidized oil, ignite spontaneously.
20.....................................  Fire may produce irritating or poisonous gases.
21.....................................  Dust may contain toxic constituents.
22.....................................  Lead nitrate and lead sulfide are hazardous substances; see code 15 of
                                          this table and Sec.   148.270.
23.....................................  Hazardous substance when consisting of pieces having a diameter less
                                          than 100 micrometers (0.004 in.); see code 15 of this table and Sec.
                                          148.270.
24.....................................  Cargo subject to liquefaction.
25.....................................  Subject to liquefaction if average particle size of cargo is less than
                                          10 mm (.394 in.).
26.....................................  This entry is considered a Marine Pollutant in accordance with 49 CFR
                                          172.101 Appendix B.
27.....................................  This entry is considered a certain dangerous cargo in accordance with
                                          33 CFR 160.202.
----------------------------------------------------------------------------------------------------------------


[75 FR 64591, Oct. 19, 2010, as amended by USCG-2005-21869, 80 FR 5336, 
Jan. 30, 2015]



Sec.  148.12  Assignment and certification.

    (a) The National Cargo Bureau is authorized to assist the Coast 
Guard in administering the provisions of this part by--
    (1) Inspecting vessels for suitability for loading solid materials 
in bulk;
    (2) Examining stowage of solid materials loaded in bulk on board 
vessels;
    (3) Making recommendations on stowage requirements applicable to the 
transportation of solid materials in bulk; and
    (4) Issuing certificates of loading that verify stowage of the solid 
material in bulk meets requirements of this part.
    (b) Certificates of loading from the National Cargo Bureau are 
accepted as evidence of compliance with bulk solid transport 
regulations.



                        Subpart B_Special Permits



Sec.  148.15  Petition for a special permit.

    (a) Each shipper who wishes to ship a bulk solid material not listed 
in Table 148.10 of this part must determine whether the material meets 
the definition of any hazard class, or the definition of a PDM, as those 
terms are defined in Sec.  148.3 of this part.
    (b) If the material meets any of the definitions described in 
paragraph (a) of this section, the shipper then must submit a petition 
in writing to the Commandant (CG-ENG-5) for authorization to ship any 
hazardous material or PDM not listed in Table 148.10 of this part.
    (c) If the Commandant (CG-ENG-5) approves a petition for 
authorization, the Commandant (CG-ENG-5) issues the petitioner a Coast 
Guard special permit. The permit allows the material

[[Page 72]]

to be transported in bulk by vessel and outlines requirements for this 
transport.
    (d) A tripartite agreement developed in conjunction with the United 
States and in accordance with the IMSBC Code (incorporated by reference, 
see Sec.  148.8) may be used in lieu of a special permit.



Sec.  148.20  Deadlines for submission of petition and related requests.

    (a) A petition for a special permit must be submitted at least 45 
days before the requested effective date. Requests for extension or 
renewal of an existing special permit must be submitted 20 days before 
the date of expiration.
    (b) Requests for extension or renewal must include the information 
required under Sec.  148.21(a), (f), and (g) of this part.



Sec.  148.21  Necessary information.

    Each petition for a special permit must contain at least the 
following:
    (a) A description of the material, including, if a hazardous 
material--
    (1) The proper shipping name from the table in 49 CFR 172.101;
    (2) The hazard class and division of the material; and
    (3) The identification number of the material.
    (b) A material safety data sheet (MSDS) for the material or--
    (1) The chemical name and any trade names or common names of the 
material;
    (2) The composition of the material, including the weight percent of 
each constituent;
    (3) Physical data, including color, odor, appearance, melting point, 
and solubility;
    (4) Fire and explosion data, including auto-ignition temperature, 
any unusual fire or explosion hazards, and any special fire fighting 
procedures;
    (5) Health hazards, including any dust inhalation hazards and any 
chronic health effects;
    (6) The threshold limit value (TLV) of the material or its major 
constituents, if available, and any relevant toxicity data;
    (7) Reactivity data, including any hazardous decomposition products 
and any incompatible materials; and
    (8) Special protection information, including ventilation 
requirements and personal protection equipment required.
    (c) Other potentially dangerous characteristics of the material not 
covered by paragraph (b) of this section, including--
    (1) Self-heating;
    (2) Depletion of oxygen in the cargo space;
    (3) Dust explosion; and
    (4) Liquefaction.
    (d) A detailed description of the proposed transportation operation, 
including--
    (1) The type of vessel proposed for water movements;
    (2) The expected loading and discharge ports, if known;
    (3) Procedures to be used for loading and unloading the material;
    (4) Precautions to be taken when handling the material; and
    (5) The expected temperature of the material at the time it will be 
loaded on the vessel.
    (e) Test results (if required under Subpart E of this part).
    (f) Previous approvals or permits.
    (g) Any relevant shipping or accident experience (or any other 
relevant transportation history by any mode of transport).



Sec.  148.25  Activities covered by a special permit.

    (a) Each special permit covers any shipment of the permitted 
material by the shipper and also covers for each shipment--
    (1) Each transfer operation;
    (2) Each vessel involved in the shipment; and
    (3) Each individual involved in any cargo handling operation.
    (b) Each special permit is valid for a period determined by the 
Commandant (CG-ENG-5) and specified in the special permit. The period 
will not exceed 4 years and is subject to suspension or revocation 
before its expiration date.



Sec.  148.26  Standard conditions for special permits.

    (a) Each special permit holder must comply with all the requirements 
of this part unless specifically exempted by the terms of the special 
permit.

[[Page 73]]

    (b) Each special permit holder must provide a copy of the special 
permit and the information required in Sec.  148.60 of this part to the 
master or person in charge of each vessel carrying the material.
    (c) The master of a vessel transporting a special permit material 
must ensure that a copy of the special permit is on board the vessel. 
The special permit must be kept with the dangerous cargo manifest if 
such a manifest is required by Sec.  148.70 of this part.
    (d) The person in charge of a barge transporting any special permit 
material must ensure that a copy of the special permit is on board the 
tug or towing vessel. When the barge is moored, the special permit must 
be kept on the barge with the shipping papers as prescribed in Sec.  
148.62 of this part.



Sec.  148.30  Records of special permits issued.

    A list of all special permits issued, and copies of each, are 
available from the Commandant (CG-ENG-5).



              Subpart C_Minimum Transportation Requirements



Sec.  148.50  Cargoes subject to this subpart.

    The regulations in this subpart apply to each bulk shipment of--
    (a) A material listed in Table 148.10 of this part; and
    (b) Any solid material shipped under the terms of a Coast Guard 
special permit.



Sec.  148.51  Temperature readings.

    When Subpart D of this part sets a temperature limit for loading or 
transporting a material, apply the following rules:
    (a) The temperature of the material must be measured 20 to 36 
centimeters (8 to 14 inches) below the surface at 3 meter (10 foot) 
intervals over the length and width of the stockpile or cargo hold.
    (b) The temperature must be measured at every spot in the stockpile 
or cargo hold that shows evidence of heating.
    (c) Before loading or transporting the material, all temperatures 
measured must be below the temperature limit set in Subpart D of this 
part.



Sec.  148.55  International shipments.

    (a) Importer's responsibility. Each person importing any bulk solid 
material requiring special handling into the United States must provide 
the shipper and the forwarding agent at the place of entry into the 
United States with timely and complete information as to the 
requirements of this part that will apply to the shipment of the 
material within the United States.
    (b) IMSBC Code. Notwithstanding the provisions of this part, a bulk 
solid material that is classed, described, stowed, and segregated in 
accordance with the IMSBC Code (incorporated by reference, see Sec.  
148.8), and otherwise conforms to the requirements of this section, may 
be offered and accepted for transportation and transported within the 
United States. The following conditions and limitations apply:
    (1) A bulk solid material that is listed in Table 148.10 of this 
part, but is not subject to the requirements of the IMSBC Code, may not 
be transported under the provisions of this section and is subject to 
the requirements of this part. Examples of such materials include 
environmentally hazardous substances, solid, n.o.s.
    (2) Zinc Ashes must conform to the requirements found in Sec.  
148.330 of this part.
    (3) Exemptions granted by other competent authorities in accordance 
with the IMSBC Code must be approved by the Commandant (CG-ENG-5) in 
accordance with Sec.  148.5 of this part.
    (4) Tripartite agreements granted by other competent authorities in 
accordance with the IMSBC Code must be authorized for use in the United 
States by the Commandant (CG-ENG-5).



Sec.  148.60  Shipping papers.

    The shipper of a material listed in Table 148.10 of this part must 
provide the master or his representative with appropriate information on 
the cargo in the form of a shipping paper, in English, prior to loading. 
Information on the shipping paper must include the following:

[[Page 74]]

    (a) The appropriate BCSN. Secondary names may be used in addition to 
the BCSN;
    (b) The identification number, if applicable;
    (c) The hazard class of the material as listed in Table 148.10 of 
this part or on the Special Permit for the material;
    (d) The total quantity of the material to be transported;
    (e) The stowage factor;
    (f) The need for trimming and the trimming procedures, as necessary;
    (g) The likelihood of shifting, including angle of repose, if 
applicable;
    (h) A certificate on the moisture content of the cargo and its 
transportable moisture limit for cargoes that are subject to 
liquefaction;
    (i) Likelihood of formation of a wet base;
    (j) Toxic or flammable gases that may be generated by the cargo, if 
applicable;
    (k) Flammability, toxicity, corrosiveness, and propensity to oxygen 
depletion of the cargo, if applicable;
    (l) Self-heating properties of the cargo, if applicable;
    (m) Properties on emission of flammable gases in contact with water, 
if applicable;
    (n) Radioactive properties, if applicable;
    (o) The name and address of the U.S. shipper (consignor) or, if the 
shipment originates in a foreign country, the U.S. consignee.
    (p) A certification, signed by the shipper, that bears the following 
statement: ``This is to certify that the above named material is 
properly named, prepared, and otherwise in proper condition for bulk 
shipment by vessel in accordance with the applicable regulations of the 
U.S. Coast Guard.''



Sec.  148.61  Emergency response information.

    The shipper of a material listed in Table 148.10 of this part must 
provide the master or his representative with appropriate emergency 
response information. This information may be included on the shipping 
papers or in a separate document such as a material safety data sheet 
(MSDS). The information must include preliminary first aid measures and 
emergency procedures to be carried out in the event of an incident or 
fire involving the cargo.



Sec.  148.62  Location of shipping papers and emergency response
information.

    (a) The shipping paper and emergency response information required 
by Sec. Sec.  148.60 and 148.61 of this part must be kept on board the 
vessel along with the dangerous cargo manifest required by Sec.  148.70 
of this part. When the shipment is by unmanned barge the shipping papers 
and emergency response information must be kept on the tug or towing 
vessel. When an unmanned barge is moored, the shipping paper and 
emergency response information must be on board the barge in a readily 
retrievable location.
    (b) Any written certification or statement from the shipper to the 
master of a vessel or to the person in charge of a barge must be on, or 
attached to, the shipping paper. See Subparts E and F of this part for 
required certifications.



Sec.  148.70  Dangerous cargo manifest; general.

    (a) Except as provided in paragraph (b) of this section and in Sec.  
148.72 of this part, each vessel transporting materials listed in Table 
148.10 of this part must have a dangerous cargo manifest on board.
    (b) This document must be kept in a designated holder on or near the 
vessel's bridge. When required for an unmanned barge, the document must 
be on board the tug or towing vessel.



Sec.  148.71  Information included in the dangerous cargo manifest.

    The dangerous cargo manifest must include the following:
    (a) The name and official number of the vessel. If the vessel has no 
official number, the international radio call sign must be substituted;
    (b) The nationality of the vessel;
    (c) The name of the material as listed in Table 148.10 of this part;
    (d) The hold or cargo compartment in which the material is being 
transported;

[[Page 75]]

    (e) The quantity of material loaded in each hold or cargo 
compartment; and
    (f) The signature of the master acknowledging that the manifest is 
correct, and the date of the signature.



Sec.  148.72  Dangerous cargo manifest; exceptions.

    (a) No dangerous cargo manifest is required for--
    (1) Shipments by unmanned barge, except on an international voyage; 
and
    (2) Shipments of materials designated as potentially dangerous 
materials in Table 148.10 of this part.
    (b) When a dangerous cargo manifest is required for an unmanned 
barge on an international voyage, Sec.  148.71(d) of this part does not 
apply, unless the barge has more than one cargo compartment.



Sec.  148.80  Supervision of cargo transfer.

    The master must ensure that cargo transfer operations are supervised 
by a responsible person as defined in Sec.  148.3 of this part.



Sec.  148.85  Required equipment for confined spaces.

    When transporting a material that is listed in Table 148.10 of this 
part, each vessel, other than an unmanned barge, must have on board the 
following:
    (a) Equipment capable of measuring atmospheric oxygen. At least two 
members of the crew must be knowledgeable in the use of the equipment, 
which must be maintained in a condition ready for use and calibrated 
according to the manufacturer's instructions.
    (b) At least two self-contained, pressure-demand-type, air breathing 
apparatus approved by the Mine Safety and Health Administration (MSHA) 
or the National Institute for Occupational Safety and Health (NIOSH), 
each having at least a 30-minute air supply. Each foreign flag vessel 
must have on board at least two such apparatus that are approved by the 
flag state administration. The master must ensure that the breathing 
apparatus is used only by persons trained in its use.



Sec.  148.86  Confined space entry.

    (a) Except in an emergency, no person may enter a confined space 
unless that space has been tested to ensure there is sufficient oxygen 
to support life. If the oxygen content is below 19.5 percent, the space 
must be ventilated and retested before entry.
    (b) In an emergency, a confined space may be entered by a trained 
person wearing self-contained breathing apparatus, suitable protective 
clothing as necessary, and a wire rope safety line tended by a trained 
person outside the hold or in an adjacent space. Emergency entry into a 
confined space must be supervised by a responsible person as defined in 
Sec.  148.3 of this part.



Sec.  148.90  Preparations before loading.

    Before loading any material listed in Table 148.10 of this part, in 
bulk on board a vessel, the following conditions must be met:
    (a) If a hold previously has contained any material required under 
Subpart D of this part to be segregated from the material to be loaded, 
the hold must be thoroughly cleaned of all residue of the previous 
cargoes.
    (b) If the material to be loaded is Class 4.1, 4.2, or 5.1, then all 
combustible materials must be removed from the hold. Examples of some 
combustible materials are residue of previous cargoes, loose debris, and 
dunnage. Permanent wooden battens or sheathing may remain in the hold 
unless forbidden by Subpart E of this part.
    (c) If the material to be loaded is classified as Class 4.3, or is 
subject to liquefaction, the hold and associated bilge must be as dry as 
practicable.



Sec.  148.100  Log book entries.

    During the transport in bulk of a material listed in Table 148.10 of 
this part, the master must keep a record of each temperature measurement 
and each test for toxic or flammable gases required by this part. The 
date and time of each measurement and test must be recorded in the 
vessel's log.



Sec.  148.110  Procedures followed after unloading.

    (a) After a material covered by this part has been unloaded from a 
vessel, each hold or cargo compartment must

[[Page 76]]

be thoroughly cleaned of all residue of such material unless the hold is 
to be reloaded with that same cargo.
    (b) When on U.S. territorial seas or inland waters, cargo associated 
wastes, cargo residue, and deck sweepings must be retained on the vessel 
and disposed of in accordance with 33 CFR parts 151.51 through 151.77.



Sec.  148.115  Report of incidents.

    (a) When a fire or other hazardous condition occurs on a vessel 
transporting a material covered by this part, the master must notify the 
nearest Captain of the Port as soon as possible and comply with any 
instructions given.
    (b) Any incident or casualty occurring while transporting a material 
covered by this part must also be reported as required under 49 CFR 
171.15, if applicable. A copy of the written report required under 49 
CFR 171.16 must also be sent to the Commandant (CG-ENG-5), Attn: 
Hazardous Materials Division, U.S. Coast Guard Stop 7509, 2703 Martin 
Luther King Jr. Avenue SE., Washington, DC 20593-7509, at the earliest 
practicable moment.
    (c) Any release to the environment of a hazardous substance in a 
quantity equal to or in excess of its reportable quantity (RQ) must be 
reported immediately to the National Response Center at 800-424-8802 
(toll free) or 202-267-2675; or online at www.nrc.uscg.mil..

[75 FR 64591, Oct. 19, 2010, as amended by USCG-2013-0671, 78 FR 60154, 
Sept. 30, 2013]



                    Subpart D_Stowage and Segregation



Sec.  148.120  Stowage and segregation requirements.

    (a) Each material listed in Table 148.10 of this part must be 
segregated from incompatible materials in accordance with--
    (1) The requirements of Tables 148.120A and 148.120B of this section 
that pertain to the primary or subsidiary hazard class to which the 
materials belong. Whenever a subsidiary hazard may exist, the most 
stringent segregation requirement applies; and
    (2) Any specific requirements in Subpart D of this part.
    (b) Materials that are required to be separated during stowage must 
not be handled at the same time. Any residue from a material must be 
removed before a material required to be separated from it is loaded.
    (c) Definitions and application of segregation terms:
    (1) ``Separated from'' means located in different cargo compartments 
or holds when stowed under deck. If the intervening deck is resistant to 
fire and liquid, a vertical separation, i.e., in different cargo 
compartments, is acceptable as equivalent to this segregation.
    (2) ``Separated by a complete cargo compartment or hold from'' means 
either a vertical or horizontal separation, for example, by a complete 
cargo compartment or hold. If the intervening decks are not resistant to 
fire and liquid, only horizontal separation is acceptable.
    (3) ``Separated longitudinally by an intervening complete cargo 
compartment or hold from'' means that vertical separation alone does not 
meet this requirement.

                                           Table 148.120A--Segregation Between Incompatible Bulk Solid Cargoes
--------------------------------------------------------------------------------------------------------------------------------------------------------
                     Bulk solid materials                         Class      4.1       4.2       4.3       5.1       6.1        7         8       9/PDM
--------------------------------------------------------------------------------------------------------------------------------------------------------
Flammable solid...............................................      4.1         X   ........  ........  ........  ........  ........  ........
Spontaneously combustible material............................      4.2         2         X   ........  ........  ........  ........  ........
Dangerous when wet material...................................      4.3         3         3         X   ........  ........  ........  ........
Oxidizer......................................................      5.1         3         3         3         X   ........  ........  ........
Poisonous material............................................      6.1         X         X         X         2         X   ........  ........
Radioactive material..........................................        7         2         2         2         2         2         X   ........
Corrosive material............................................        8         2         2         2         2         X         X         X
Miscellaneous hazardous material and potential dangerous          9/PDM         X         X         X         X         X         2         X         X
 material.....................................................
--------------------------------------------------------------------------------------------------------------------------------------------------------
Numbers and symbols indicate the following terms as defined in Sec.   148.3 of this part:
2--``Separated from''.

[[Page 77]]

 
3--``Separated by a complete hold or compartment from''.
X--No segregation required, except as specified in an applicable section of this subpart or Subpart E of this part.


                                Table 148.120B--Segregation Between Bulk Solid Cargoes and Incompatible Packaged Cargoes
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                   Bulk solid material
                  Packaged hazardous material                  -----------------------------------------------------------------------------------------
                                                                  Class      4.1       4.2       4.3       5.1       6.1        7         8       9/PDM
--------------------------------------------------------------------------------------------------------------------------------------------------------
Explosives....................................................      1.1         4         4         4         4         2         2         4         X
                                                                    1.2
                                                                    1.5
Explosives....................................................      1.3         3         3         4         4         2         2         2         X
                                                                    1.6
Explosives....................................................      1.4         2         2         2         2         X         2         2         X
Flammable gas.................................................      2.1         2         2         1         2         X         2         2         X
Non-flammable compressed gas..................................      2.2         2         2         X         X         X         2         1         X
Poisonous gas.................................................      2.3         2         2         X         X         X         2         1         X
Flammable liquid..............................................        3         2         2         2         2         X         2         1         X
Flammable solid...............................................      4.1         X         1         X         1         X         2         1         X
Spontaneously combustible material............................      4.2         1         X         1         2         1         2         1         X
Dangerous when wet material...................................      4.3         X         1         X         2         X         2         1         X
Oxidizer......................................................      5.1         1         2         2         X         1         1         2         X
Organic peroxide..............................................      5.2         2         2         2         2         1         2         2         X
Poisonous material............................................      6.1         X         1         X         1         X         X         X         X
Infectious substance..........................................      6.2         3         3         2         3         1         3         3         X
Radioactive material..........................................        7         2         2         2         1         X         X         2         X
Corrosive material............................................        8         1         1         1         2         X         2         X         X
Miscellaneous hazardous material..............................        9         X         X         X         X         X         X         X         X
--------------------------------------------------------------------------------------------------------------------------------------------------------
Numbers and symbols indicate the following terms as defined in Sec.   148.3 of this part:
1--``Away from''.
2--``Separated from''.
3--``Separated by a complete hold or compartment from''.
4--``Separated longitudinally by an intervening complete compartment or hold from''.
X--No segregation required, except as specified in an applicable section of this subpart or Subpart E of this part.



Sec.  148.125  Stowage and segregation for materials of Class 4.1.

    (a) Class 4.1 materials listed in Table 148.10 of this part must--
    (1) Be kept as cool and dry as practical before loading;
    (2) Not be loaded or transferred between vessels during periods of 
rain or snow;
    (3) Be stowed separated from foodstuffs; and
    (4) Be stowed clear of sources of heat and ignition and protected 
from sparks and open flame.
    (b) Bulkheads between a hold containing a Class 4.1 material and 
incompatible materials must have cable and conduit penetrations sealed 
against the passage of gas and vapor.



Sec.  148.130  Stowage and segregation for materials of Class 4.2.

    (a) Class 4.2 materials listed in Table 148.10 of this part must--
    (1) Be kept as cool and dry as practical before loading;
    (2) Not be loaded or transferred between vessels during periods of 
rain or snow;
    (3) Be stowed clear of sources of heat and ignition and protected 
from sparks and open flame; and
    (4) Except for copra and seed cake, be stowed separate from 
foodstuffs.
    (b) The bulkhead between a hold containing a Class 4.2 material and 
a hold containing a material not permitted to mix with Class 4.2 
materials must have cable and conduit penetrations sealed against the 
passage of gas and vapor.



Sec.  148.135  Stowage and segregation for materials of Class 4.3.

    (a) Class 4.3 materials listed in Table 148.10 of this part which, 
in contact with water, emit flammable gases, must--
    (1) Be kept as cool and dry as practical before loading;
    (2) Not be loaded or transferred between vessels during periods of 
rain or snow;
    (3) Be stowed separate from foodstuffs and all Class 8 liquids; and
    (4) Be stowed in a mechanically ventilated hold. Exhaust gases must 
not penetrate into accommodation, work or control spaces. Unmanned 
barges

[[Page 78]]

that have adequate natural ventilation need not have mechanical 
ventilation.
    (b) The bulkhead between a hold containing a Class 4.3 material and 
incompatible materials must have cable and conduit penetrations sealed 
against the passage of gas and vapor.



Sec.  148.140  Stowage and segregation for materials of Class 5.1.

    (a) Class 5.1 materials listed in Table 148.10 of this part must--
    (1) Be kept as cool and dry as practical before loading;
    (2) Be stowed away from all sources of heat or ignition; and
    (3) Be stowed separate from foodstuffs and all readily combustible 
materials.
    (b) Special care must be taken to ensure that holds containing Class 
5.1 materials are clean and, whenever practical, only noncombustible 
securing and protecting materials are used.
    (c) Class 5.1 materials must be prevented from entering bilges or 
other cargo holds.



Sec.  148.145  Stowage and segregation for materials of Class 7.

    (a) Class 7 material listed in Table 148.10 of this part must be 
stowed--
    (1) Separate from foodstuffs; and
    (2) In a hold or barge closed or covered to prevent dispersal of the 
material during transportation.
    (b) [Reserved]



Sec.  148.150  Stowage and segregation for materials of Class 9.

    (a) A bulk solid cargo of Class 9 material (miscellaneous hazardous 
material) listed in Table 148.10 of this part must be stowed and 
segregated as required by this section.
    (b) Ammonium nitrate fertilizer of Class 9 must be segregated as 
required for Class 5.1 materials in Sec. Sec.  148.120 and 148.140 of 
this part and must be stowed--
    (1) Separated by a complete hold or compartment from readily 
combustible materials, chlorates, hypochlorites, nitrites, 
permanganates, and fibrous materials (e.g., cotton, jute, sisal, etc.);
    (2) Clear of all sources of heat, including insulated piping; and
    (3) Out of direct contact with metal engine-room boundaries.
    (c) Castor beans must be stowed separate from foodstuffs and Class 
5.1 materials.
    (d) Fish meal must be stowed and segregated as required for Class 
4.2 materials in Sec. Sec.  148.120 and 148.130 of this part. In 
addition, its temperature at loading must not exceed 35 [deg]C (95 
[deg]F), or 5 [deg]C (9 [deg]F) above ambient temperature, whichever is 
higher.
    (e) Sulfur must be stowed and segregated as required under 
Sec. Sec.  148.120 and 148.125 of this part for a material of Class 4.1.



Sec.  148.155  Stowage and segregation for potentially dangerous materials.

    (a) A PDM must be stowed and segregated according to the 
requirements of this section and Table 148.155 of this section.
    (b) When transporting coal--
    (1) Coal must be stowed separate from materials of Class/division 
1.4 and Classes 2, 3, 4, and 5 in packaged form; and separated from bulk 
solid materials of Classes 4 and 5.1;
    (2) No material of Class 5.1, in either packaged or bulk solid form, 
may be stowed above or below a cargo of coal; and
    (3) Coal must be separated longitudinally by an intervening complete 
cargo compartment or hold from materials of Class 1 other than Class/
division 1.4.
    (c) When transporting direct reduced iron (DRI)--
    (1) DRI lumps, pellets, or cold-molded briquettes, and DRI hot-
molded briquettes, must be separated from materials of Class/division 
1.4, Classes 2, 3, 4, 5, Class 8 acids in packaged form, and bulk solid 
materials of Classes 4 and 5.1; and
    (2) No material of Class 1, other than Class/division 1.4, may be 
transported on the same vessel with DRI.
    (d) Petroleum coke, calcined or uncalcined, must be--
    (1) Separated longitudinally by an intervening complete cargo 
compartment or hold from materials of Class/divisions 1.1 and 1.5; and
    (2) Separated by a complete cargo compartment or hold from all 
hazardous materials and other potentially dangerous materials in 
packaged and bulk solid form.

[[Page 79]]



                                 Table 148.155--Stowage and Segregation Requirements for Potentially Dangerous Material
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                   Load only
                                     Segregate as   ``Separate     under dry                  Mechanical      ``Separate from''
   Potentially dangerous material      for class      from''        weather      Keep dry     ventilation      material listed       Special provisions
                                      listed \1\    foodstuffs    conditions                   required
--------------------------------------------------------------------------------------------------------------------------------------------------------
Aluminum Smelting By-products or             4.3             X             X             X             X   Class 8 liquids
 Aluminum Re-melting Byproducts.
Brown Coal Briquettes..............  ............  ............  ............  ............  ............  See paragraph (b) of    See paragraph (b) of
                                                                                                            this section.           this section.
Charcoal...........................          4.1   ............  ............            X   ............  Oily materials
Coal...............................  ............  ............  ............  ............  ............  See paragraph (b) of    See paragraph (b) of
                                                                                                            this section.           this section.
Direct reduced iron (A)............  ............  ............  ............  ............  ............  See paragraph (c) of    See paragraph (c) of
                                                                                                            this section.           this section.
Direct reduced iron (B)............  ............  ............  ............  ............  ............  See paragraph (c) of    See paragraph (c) of
                                                                                                            this section.           this section.
Ferrophosphorus....................          4.3             X             X             X             X   Class 8 liquids
Ferrolilicon.......................          4.3             X             X             X             X   Class 8 liquids
Fluorospar.........................  ............            X   ............  ............  ............  Class 8 liquids
Lime, Unslaked.....................  ............  ............  ............            X   ............  All packaged and bulk
                                                                                                            solid hazardous
                                                                                                            materials.
Linted Cotton Seed.................  ............  ............  ............            X   ............
Magnesia, Unslaked.................  ............  ............  ............  ............  ............  All packaged and bulk
                                                                                                            solid hazardous
                                                                                                            materials.
Metal Sulfide Concentrates.........          4.2             X   ............  ............  ............  Class 8 liquids
Petroleum Coke.....................  ............            X   ............  ............  ............                          See section
                                                                                                                                    148.155(d).
Pitch Prill........................          4.1   ............  ............  ............  ............
Pyrites, Calcined..................  ............            X             X             X             X
Sawdust............................          4.1   ............  ............            X   ............  All Class 5.1 and 8
                                                                                                            liquids.
Silicomanganese....................          4.3             X             X             X             X   Class 8 liquids
Tankage............................          4.2             X             X   ............  ............
Vanadium...........................          6.1             X   ............  ............  ............
Wood chips.........................          4.1   ............  ............  ............  ............
Wood pellets.......................          4.1   ............  ............  ............  ............
Wood pulp pellets..................          4.1   ............  ............  ............  ............
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ See Tables 148.120A and B.



          Subpart E_Special Requirements for Certain Materials



Sec.  148.200  Purpose.

    This subpart prescribes special requirements for specific materials. 
These requirements are in addition to the minimum transportation 
requirements in Subpart C of this part that are applicable to all 
materials listed in Table 148.10 of this part.

[[Page 80]]



Sec.  148.205  Ammonium nitrate and ammonium nitrate fertilizers.

    (a) This section applies to the stowage and transportation in bulk 
of ammonium nitrate and the following fertilizers composed of uniform, 
non-segregating mixtures containing ammonium nitrate:
    (1) Ammonium nitrate containing added organic matter that is 
chemically inert towards the ammonium nitrate; containing at least 90 
percent ammonium nitrate and a maximum of 0.2 percent of combustible 
material (including organic material calculated as carbon); or 
containing less than 90 percent but more than 70 percent of ammonium 
nitrate and a maximum of 0.4 percent combustible material;
    (2) Ammonium nitrate with calcium carbonate and/or dolomite, 
containing more than 80 percent but less than 90 percent of ammonium 
nitrate and a maximum of 0.4 percent of total combustible material;
    (3) Ammonium nitrate with ammonium sulfate containing more than 45 
percent but a maximum of 70 percent of ammonium nitrate and containing a 
maximum of 0.4 percent of combustible material; and
    (4) Nitrogen phosphate or nitrogen/potash type fertilizers or 
complete nitrogen/phosphate/potash type fertilizers containing more than 
70 percent but less than 90 percent of ammonium nitrate and a maximum of 
0.4 percent of combustible material.
    (b) No material covered by this section may be transported in bulk 
unless it demonstrates resistance to detonation when tested by one of 
the following methods:
    (1) Appendix 2, Section 5, of the IMSBC Code (incorporated by 
reference, see Sec.  148.8);
    (2) Test series 1 and 2 of the Class 1 (explosive) in the UN Manual 
of Tests and Criteria, Part I (incorporated by reference, see Sec.  
148.8); or
    (3) An equivalent test satisfactory to the Administration of the 
country of shipment.
    (c) Before loading a material covered by this section--
    (1) The shipper must give the master of the vessel written 
certification that the material has met the test requirements of 
paragraph (b) of this section;
    (2) The cargo hold must be inspected for cleanliness and free from 
readily combustible materials;
    (3) Each cargo hatch must be weathertight as defined in Sec.  42.13-
10 of this chapter;
    (4) The temperature of the material must be less than 55 [deg]C (131 
[deg]F); and
    (5) Each fuel tank under a cargo hold where the material is stowed 
must be pressure tested before loading to ensure that there is no 
leakage of manholes or piping systems leading through the cargo hold.
    (d) Bunkering or transferring of fuel to or from the vessel may not 
be performed during cargo loading and unloading operations involving a 
material covered by this section.
    (e) When a material covered by this section is transported on a 
cargo vessel--
    (1) No other material may be stowed in the same hold with that 
material;
    (2) In addition to the segregation requirements in Sec.  148.140 of 
this part, the material must be separated by a complete cargo 
compartment or hold from readily combustible materials, chlorates, 
chlorides, chlorites, hypochlorites, nitrites, permanganates, and 
fibrous materials; and
    (3) The bulkhead between a cargo hold containing a material covered 
by this section and the engine room must be insulated to ``A-60'' class 
division or an equivalent arrangement to the satisfaction of the 
cognizant Coast Guard Captain of the Port or the Administration of the 
country of shipment.



Sec.  148.220  Ammonium nitrate-phosphate fertilizers.

    (a) This section applies to the stowage and transportation of 
uniform, nonsegregating mixtures of nitrogen/phosphate or nitrogen/
potash type fertilizers, or complete fertilizers of nitrogen/phosphate/
potash type containing a maximum of 70 percent of ammonium nitrate and 
containing a maximum of 0.4 percent total added combustible material or 
containing a maximum of 45 percent ammonium nitrate with unrestricted 
combustible material.
    (b) A fertilizer mixture described in paragraph (a) of this section 
is exempt if--

[[Page 81]]

    (1) When tested in accordance with the trough test prescribed in 
Appendix 2, Section 4, of the IMSBC Code or in the UN Manual of Tests 
and Criteria, Part III, Subsection 38.2 (incorporated by reference, see 
Sec.  148.8), it is found to be free from the risk of self-sustaining 
decomposition.
    (2) [Reserved]
    (c) No fertilizer covered by this section may be transported in bulk 
if, when tested in accordance with the trough test prescribed in 
Appendix 2, Section 4, of the IMSBC Code or in the UN Manual of Tests 
and Criteria, Part III, Subsection 38.2 (incorporated by reference, see 
Sec.  148.8), it has a self-sustaining decomposition rate that is 
greater than 0.25 meters per hour, or is liable to self-heat sufficient 
to initiate decomposition.
    (d) Fertilizers covered by this section must be stowed away from all 
sources of heat, and out of direct contact with a metal engine 
compartment boundary.
    (e) Bunkering or transferring of fuel may not be performed during 
loading and unloading of fertilizer covered by this section.
    (f) Fertilizer covered by this section must be segregated as 
prescribed in Sec. Sec.  148.140 and 148.220(d) of this part.



Sec.  148.225  Calcined pyrites (pyritic ash, fly ash).

    (a) This part does not apply to the shipment of calcined pyrites 
that are the residual ash of oil or coal fired power stations.
    (b) This section applies to the stowage and transportation of 
calcined pyrites that are the residual product of sulfuric acid 
production or elemental metal recovery operations.
    (c) Before loading calcined pyrites covered by this section--
    (1) The cargo space must be as clean and dry as practical;
    (2) The calcined pyrites must be dry; and
    (3) Precautions must be taken to prevent the penetration of calcined 
pyrites into other cargo spaces, bilges, wells, and ceiling boards.
    (d) After calcined pyrites covered by this section have been 
unloaded from a cargo space, the cargo space must be thoroughly cleaned. 
Cargo residues and sweepings must be disposed of as prescribed in 33 CFR 
parts 151.55 through 151.77.



Sec.  148.227  Calcium nitrate fertilizers.

    This part does not apply to commercial grades of calcium nitrate 
fertilizers consisting mainly of a double salt (calcium nitrate and 
ammonium nitrate) and containing a maximum of 15.5 percent nitrogen and 
at least 12 percent of water.



Sec.  148.230  Calcium oxide (lime, unslaked).

    (a) When transported by barge, unslaked lime (calcium oxide) must be 
carried in an unmanned, all steel, double-hulled barge equipped with 
weathertight hatches or covers. The barge must not carry any other cargo 
while unslaked lime is on board.
    (b) The shipping paper requirements in Sec.  148.60 of this part and 
the dangerous cargo manifest requirements in Sec.  148.70 of this part 
do not apply to the transportation of unslaked lime under paragraph (a) 
of this section.



Sec.  148.235  Castor beans.

    (a) This part applies only to the stowage and transportation of 
whole castor beans. Castor meal, castor pomace, and castor flakes may 
not be shipped in bulk.
    (b) Persons handling castor beans must wear dust masks and goggles.
    (c) Care must be taken to prevent castor bean dust from entering 
accommodation, control, or service spaces during cargo transfer 
operations.



Sec.  148.240  Coal.

    (a) The electrical equipment in cargo holds carrying coal must meet 
the requirements of Subpart 111.105 of this chapter or an equivalent 
standard approved by the administration of the vessel's flag state.
    (b) Before coal is loaded in a cargo hold, the bilges must be as 
clean and dry as practical. The hold must also be free of any readily 
combustible material, including the residue of previous cargoes if other 
than coal.
    (c) The master of each vessel carrying coal must ensure that--
    (1) All openings to the cargo hold, except for unloading gates on 
self-unloading vessels, are sealed before loading

[[Page 82]]

the coal and, unless the coal is as described in paragraph (f) of this 
section, the hatches must also be sealed after loading;
    (2) As far as practical, gases emitted by the coal do not accumulate 
in enclosed working spaces such as storerooms, shops, or passageways, 
and tunnel spaces on self-unloading vessels, and that such spaces are 
adequately ventilated;
    (3) The vessel has adequate ventilation as required by paragraph (f) 
of this section; and
    (4) If the temperature of the coal is to be monitored under 
paragraph (e)(2)(i) of this section, the vessel has instruments that are 
capable of measuring the temperature of the cargo in the range 0[deg]-
100 [deg]C (32 [deg]-212 [deg]F) without entry into the cargo hold.
    (d) A cargo hold containing coal must not be ventilated unless the 
conditions of paragraph (f) of this section are met, or unless methane 
is detected under paragraph (h) of this section.
    (e) If coal waiting to be loaded has shown a tendency to self-heat, 
has been handled so that it may likely self-heat, or has been observed 
to be heating, the master is responsible for monitoring the temperature 
of the coal at several intervals during these times:
    (1) Before loading; and
    (2) During the voyage, by--
    (i) Measuring the temperature of the coal;
    (ii) Measuring the emission of carbon monoxide; or
    (iii) Both.
    (f) If coal waiting to be loaded has a potential to emit dangerous 
amounts of methane, for example it is freshly mined, or has a history of 
emitting dangerous amounts of methane, then:
    (1) Surface ventilation, either natural or from fixed or portable 
nonsparking fans, must be provided; and
    (2) The atmosphere above the coal must be monitored for the presence 
of methane as prescribed in paragraph (h) of this section. The results 
of this monitoring must be recorded at least twice in every 24-hour 
period, unless the conditions of paragraph (m) of this section are met.
    (g) Electrical equipment and cables in a hold containing a coal 
described in paragraph (f) of this section must be either suitable for 
use in an explosive gas atmosphere or de-energized at a point outside 
the hold. Electrical equipment and cables necessary for continuous safe 
operations, such as lighting fixtures, must be suitable for use in an 
explosive gas atmosphere. The master of the vessel must ensure that the 
affected equipment and cables remain de-energized as long as this coal 
remains in the hold.
    (h) For all coal loaded on a vessel, other than an unmanned barge, 
the atmosphere above the coal must be routinely tested for the presence 
of methane, carbon monoxide, and oxygen, following the procedures in the 
Appendices to the schedules for Coal and Brown Coal Briquettes as 
contained in the IMSBC Code (incorporated by reference, see Sec.  
148.8). This testing must be performed in such a way that the cargo 
hatches are not opened and entry into the hold is not necessary.
    (i) When carrying a coal described in paragraph (e) of this section, 
the atmosphere above the coal must be monitored for the presence of 
carbon monoxide as prescribed in paragraph (h) of this section. The 
results of this monitoring must be recorded at least twice in every 24-
hour period, unless the conditions of paragraph (m) of this section are 
met. If the level of carbon monoxide is increasing rapidly or reaches 20 
percent of the lower flammability limit (LFL), the frequency of 
monitoring must be increased.
    (j) When a cargo of coal has a potential to self-heat or has been 
observed to be heating, the hatches should be closed and sealed and all 
surface ventilation halted except as necessary to remove any methane 
that may have accumulated.
    (k) If the level of carbon monoxide monitored under paragraph (i) of 
this section continues to increase rapidly or the temperature of coal 
carried on board a vessel exceeds 55 [deg]C (131 [deg]F) and is 
increasing rapidly, the master must notify the nearest Coast Guard 
Captain of the Port of--
    (1) The name, nationality, and position of the vessel;
    (2) The most recent temperature, if measured, and levels of carbon 
monoxide and methane;

[[Page 83]]

    (3) The port where the coal was loaded and the destination of the 
coal;
    (4) The last port of call of the vessel and its next port of call; 
and
    (5) What action has been taken.
    (l) If the level of methane as monitored under paragraph (h) of this 
section reaches 20 percent of the LFL or is increasing rapidly, 
ventilation of the cargo hold, under paragraph (f) of this section, must 
be initiated. If this ventilation is provided by opening the cargo 
hatches, care must be taken to avoid generating sparks.
    (m) The frequency of monitoring required by paragraph (f) of this 
section may be reduced at the discretion of the master provided that--
    (1) The level of gas measured is less than 20 percent of the LFL;
    (2) The level of gas measured has remained steady or decreased over 
three consecutive readings, or has increased by less than 5 percent over 
four consecutive readings spanning at least 48 hours; and
    (3) Monitoring continues at intervals sufficient to determine that 
the level of gas remains within the parameters of paragraphs (m)(1) and 
(m)(2) of this section.



Sec.  148.242  Copra.

    Copra must have surface ventilation. It must not be stowed against 
heated surfaces including fuel oil tanks which may require heating.



Sec.  148.245  Direct reduced iron (DRI); lumps, pellets, and
cold-molded briquettes.

    (a) Before loading DRI lumps, pellets, or cold-molded briquettes--
    (1) The master must have a written certification from a competent 
person appointed by the shipper and recognized by the Commandant (CG-
ENG-5) stating that the DRI, at the time of loading, is suitable for 
shipment;
    (2) The DRI must be aged for at least 3 days, or be treated with an 
air passivation technique or some other equivalent method that reduces 
its reactivity to at least the same level as the aged DRI; and
    (3) Each hold and bilge must be as clean and dry as practical. Other 
than double bottom tanks, adjacent ballast tanks must be kept empty when 
possible. All wooden fixtures, such as battens, must be removed from the 
hold.
    (b) Each boundary of a hold where DRI lumps, pellets, or cold-molded 
briquettes are to be carried must be resistant to fire and passage of 
water.
    (c) DRI lumps, pellets, or cold-molded briquettes that are wet, or 
that are known to have been wetted, may not be accepted for transport. 
The moisture content of the DRI must not exceed 0.3 percent prior to 
loading.
    (d) DRI lumps, pellets and cold-molded briquettes must be protected 
at all times from contact with water, and must not be loaded or 
transferred from one vessel to another during periods of rain or snow.
    (e) DRI lumps, pellets, or cold-molded briquettes may not be loaded 
if their temperature is greater than 65 [deg]C (150 [deg]F).
    (f) The shipper of DRI lumps, pellets, or cold-molded briquettes in 
bulk must ensure that an inert atmosphere of less than 5 percent oxygen 
and 1 percent hydrogen, by volume, is maintained throughout the voyage 
in any hold containing these materials.
    (g) When DRI lumps, pellets, or cold-molded briquettes are loaded, 
precautions must be taken to avoid the concentration of fines (pieces 
less than 6.35mm in size) in any one location in the cargo hold.
    (h) Radar and RDF scanners must be protected against the dust 
generated during cargo transfer operations of DRI lumps, pellets, or 
cold-molded briquettes.



Sec.  148.250  Direct reduced iron (DRI); hot-molded briquettes.

    (a) Before loading DRI hot-molded briquettes--
    (1) The master must have a written certification from a competent 
person appointed by the shipper and recognized by the Commandant (CG-
ENG-5) that at the time of loading the DRI hot-molded briquettes are 
suitable for shipment; and
    (2) Each hold and bilge must be as clean and dry as practical. 
Except double bottom tanks, adjacent ballast tanks must be kept empty 
where possible. All wooden fixtures, such as battens, must be removed.

[[Page 84]]

    (b) All boundaries of a hold must be resistant to fire and passage 
of water to carry DRI hot-molded briquettes.
    (c) DRI hot-molded briquettes must be protected at all times from 
contact with water. They must not be loaded or transferred from one 
vessel to another during periods of rain or snow.
    (d) DRI hot-molded briquettes may not be loaded if their temperature 
is greater than 65 [deg]C (150 [deg]F).
    (e) When loading DRI hot-molded briquettes, precautions must be 
taken to avoid the concentration of fines (pieces less than 6.35mm in 
size) in any one location in the cargo hold.
    (f) Adequate surface ventilation must be provided when carrying or 
loading DRI hot-molded briquettes.
    (g) When DRI hot-molded briquettes are carried by unmanned barge--
    (1) The barge must be fitted with vents adequate to provide natural 
ventilation; and
    (2) The cargo hatches must be closed at all times after loading the 
DRI hot-molded briquettes.
    (h) Radar and RDF scanners must be adequately protected against dust 
generated during cargo transfer operations of DRI hot-molded briquettes.
    (i) During final discharge only, a fine spray of water may be used 
to control dust from DRI hot-molded briquettes.



Sec.  148.255  Ferrosilicon, aluminum ferrosilicon, and aluminum
silicon containing more than 30% but less than 90% silicon.

    (a) This section applies to the stowage and transportation of 
ferrosilicon, aluminum ferrosilicon, and aluminum silicon containing 
more than 30 percent but less than 90 percent silicon.
    (b) The shipper of material described in paragraph (a) of this 
section must give the master a written certification stating that after 
manufacture the material was stored under cover, but exposed to the 
weather, in the particle size in which it is to be shipped, for at least 
three days before shipment.
    (c) Material described in paragraph (a) of this section must be 
protected at all times from contact with water, and must not be loaded 
or unloaded during periods of rain or snow.
    (d) Except as provided in paragraph (e) of this section, each hold 
containing material described in paragraph (a) of this section must be 
mechanically ventilated by at least two separate fans. The total 
ventilation must be at least five air changes per hour, based on the 
empty hold. Ventilation must not allow escaping gas to reach 
accommodation or work spaces, on or under deck.
    (e) An unmanned barge which is provided with natural ventilation 
need not comply with paragraph (d) of this section.
    (f) Each space adjacent to a hold containing material described in 
paragraph (a) of this section must be well ventilated with mechanical 
fans. No person may enter that space unless it has been tested to ensure 
that it is free from phosphine and arsine gases.
    (g) Scuttles and windows in accommodation and work spaces adjacent 
to holds containing material described in paragraph (a) of this section 
must be kept closed while this material is being loaded and unloaded.
    (h) Any bulkhead between a hold containing material described in 
paragraph (a) of this section and an accommodation or work space must be 
gas tight and adequately protected against damage from any unloading 
equipment.
    (i) When a hold containing material described in paragraph (a) of 
this section is equipped with atmosphere sampling type smoke detectors 
with lines that terminate in accommodation or work spaces, those lines 
must be blanked off gas-tight.
    (j) If a hold containing material described in paragraph (a) of this 
section must be entered at any time, the hatches must be open for two 
hours before entry to dissipate any accumulated gases. The atmosphere in 
the hold must be tested to ensure that there is no phosphine or arsine 
gas present.
    (k) After unloading material described in paragraph (a) of this 
section, each cargo hold must be thoroughly cleaned and tested to ensure 
that no phosphine or arsine gas remains.



Sec.  148.260  Ferrous metal.

    (a) This part does not apply to the stowage and transportation in 
bulk of stainless steel borings, shavings, turnings, or cuttings; nor 
does this part apply to an unmanned barge on a

[[Page 85]]

voyage entirely on the navigable waters of United States.
    (b) Ferrous metal may not be stowed or transported in bulk unless 
the following conditions are met:
    (1) All wooden sweat battens, dunnage, and debris must be removed 
from the hold before the ferrous metal is loaded;
    (2) If weather is inclement during loading, hatches must be covered 
or otherwise protected to keep the material dry;
    (3) During loading and transporting, the bilge of each hold in which 
ferrous metal is stowed or will be stowed must be kept as dry as 
practical;
    (4) During loading, the ferrous metal must be compacted in the hold 
as frequently as practicable with a bulldozer or other means that 
provides equivalent surface compaction;
    (5) No other material may be loaded in a hold containing ferrous 
metal unless--
    (i) The material to be loaded in the same hold with the ferrous 
metal is not a material listed in Table 148.10 of this part or a readily 
combustible material;
    (ii) The loading of the ferrous metal is completed first; and
    (iii) The temperature of the ferrous metal in the hold is below 55 
[deg]C (131 [deg]F) or has not increased in eight hours before the 
loading of the other material; and
    (6) During loading, the temperature of the ferrous metal in the pile 
being loaded must be below 55 [deg]C (131 [deg]F).
    (c) The master of a vessel that is loading or transporting a ferrous 
metal must ensure that the temperature of the ferrous metal is taken--
    (1) Before loading;
    (2) During loading, in each hold and pile being loaded, at least 
once every twenty-four hours and, if the temperature is rising, as often 
as is necessary to ensure that the requirements of this section are met; 
and
    (3) After loading, in each hold, at least once every 24 hours.
    (d) During loading, if the temperature of the ferrous metal in a 
hold is 93 [deg]C (200 [deg]F) or higher, the master must notify the 
Coast Guard Captain of the Port and suspend loading until the Captain of 
the Port is satisfied that the temperature of the ferrous metal is 88 
[deg]C (190 [deg]F) or less.
    (e) After loading ferrous metal--
    (1) If the temperature of the ferrous metal in each hold is 65 
[deg]C (150 [deg]F) or above, the master must notify the Coast Guard 
Captain of the Port, and the vessel must remain in the port area until 
the Captain of the Port is satisfied that the temperature of ferrous 
metal has shown a downward trend below 65 [deg]C (150 [deg]F) for at 
least eight hours after completion of loading of the hold; or
    (2) If the temperature of the ferrous metal in each hold is less 
than 88 [deg]C (190 [deg]F) and has shown a downward trend for at least 
eight hours after the completion of loading, the master must notify the 
Coast Guard Captain of the Port, and the vessel must remain in the port 
area until the Captain of the Port confirms that the vessel is sailing 
directly to another port, no further than 12 hours sailing time, for the 
purpose of loading more ferrous metal in bulk or to completely off-load 
the ferrous metal.
    (f) Except for shipments of ferrous metal in bulk which leave the 
port of loading under the conditions specified in paragraph (e)(2) of 
this section, if after the vessel leaves the port, the temperature of 
the ferrous metal in the hold rises above 65 [deg]C (150 [deg]F), the 
master must notify the nearest Coast Guard Captain of the Port as soon 
as possible of--
    (1) The name, nationality, and position of the vessel;
    (2) The most recent temperature taken;
    (3) The length of time that the temperature has been above 65 [deg]C 
(150 [deg]F) and the rate of rise, if any;
    (4) The port where the ferrous metal was loaded and the destination 
of the ferrous metal;
    (5) The last port of call of the vessel and its next port of call;
    (6) What action has been taken; and
    (7) Whether any other cargo is endangered.



Sec.  148.265  Fish meal or fish scrap.

    (a) This part does not apply to fish meal or fish scrap that 
contains less than 5 percent moisture by weight.

[[Page 86]]

    (b) Fish meal or fish scrap may contain a maximum of 12 percent 
moisture by weight and a maximum of 15 percent fat by weight.
    (c) At the time of production, fish meal or fish scrap must be 
treated with an effective antioxidant (at least 400 mg/kg (ppm) 
ethoxyquin, at least 1000 mg/kg (ppm) butylated hydroxytoluene, or at 
least 1000 mg/kg (ppm) of tocopherol-based liquid antioxidant).
    (d) Shipment of the fish meal or fish scrap must take place a 
maximum of 12 months after the treatment prescribed in paragraph (c) of 
this section.
    (e) Fish meal or fish scrap must contain at least 100 mg/kg (ppm) of 
ethoxyquin or butylated hydroxytoluene or at least 250 mg/kg (ppm) of 
tocopherol-based antioxidant at the time of shipment.
    (f) At the time of loading, the temperature of the fish meal or fish 
scrap to be loaded may not exceed 35 [deg]C (95 [deg]F), or 5 [deg]C (9 
[deg]F) above the ambient temperature, whichever is higher.
    (g) For each shipment of fish meal or fish scrap, the shipper must 
give the master a written certification stating--
    (1) The total weight of the shipment;
    (2) The moisture content of the material;
    (3) The fat content of the material;
    (4) The type of antioxidant and its concentration in the fish meal 
or fish scrap at the time of shipment;
    (5) The date of production of the material; and
    (6) The temperature of the material at the time of shipment.
    (h) During a voyage, temperature readings must be taken of fish meal 
or fish scrap three times a day and recorded. If the temperature of the 
material exceeds 55 [deg]C (131 [deg]F) and continues to increase, 
ventilation to the hold must be restricted. This paragraph does not 
apply to shipments by unmanned barge.



Sec.  148.270  Hazardous substances.

    (a) Each bulk shipment of a hazardous substance must--
    (1) Be assigned a shipping name in accordance with 49 CFR 
172.203(c); and
    (2) If the hazardous substance is also listed as a hazardous solid 
waste in 40 CFR part 261, follow the applicable requirements of 40 CFR 
chapter I, subchapter I.
    (b) Each release of a quantity of a designated substance equal to or 
greater than the reportable quantity, as set out in Table 1 to Appendix 
A of 49 CFR 171.101, when discharged into or upon the navigable waters 
of the United States, adjoining shorelines, into or upon the contiguous 
zone, or beyond the contiguous zone, must be reported as required in 
subpart B of 33 CFR part 153.
    (c) A hazardous substance must be stowed in a hold or barge that is 
closed or covered and prevents dispersal of the material during 
transportation.
    (d) During cargo transfer operations, a spill or release of a 
hazardous substance must be minimized to the greatest extent possible. 
Each release must be reported as required in paragraph (b) of this 
section.
    (e) After a hazardous substance is unloaded, the hold in which it 
was carried must be cleaned thoroughly. The residue of the substance 
must be disposed of pursuant to 33 CFR 151.55 through 151.77 and the 
applicable regulations of 40 CFR subchapter I.



Sec.  148.275  Iron oxide, spent; iron sponge, spent.

    (a) Before spent iron oxide or spent iron sponge is loaded in a 
closed hold, the shipper must give the master a written certification 
that the material has been cooled and weathered for at least eight 
weeks.
    (b) Both spent iron oxide and spent iron sponge may be transported 
on open hold all-steel barges after exposure to air for a period of at 
least ten days.



Sec.  148.280  Magnesia, unslaked (lightburned magnesia, calcined
magnesite, caustic calcined magnesite).

    (a) This part does not apply to the transport of natural magnesite, 
magnesium carbonate, or magnesia clinkers.
    (b) When transported by barge, unslaked magnesia must be carried in 
an unmanned, all-steel, double-hulled barge equipped with weathertight 
hatches or covers. The barge may not carry any other cargo while 
unslaked magnesia is on board.

[[Page 87]]

    (c) The shipping paper requirements in Sec.  148.60 of this part and 
the dangerous cargo manifest requirements in Sec.  148.70 of this part 
do not apply to unslaked magnesia transported under the requirements of 
paragraph (b) of this section.



Sec.  148.285  Metal sulfide concentrates.

    (a) When information given by the shipper under Sec.  148.60 of this 
part indicates that the metal sulfide concentrate may generate toxic or 
flammable gases, the appropriate gas detection equipment from Sec. Sec.  
148.415 and 148.420 of this part must be on board the vessel.
    (b) No cargo hold containing a metal sulfide concentrate may be 
ventilated.
    (c) No person may enter a hold containing a metal sulfide 
concentrate unless--
    (1) The atmosphere in the cargo hold has been tested and contains 
sufficient oxygen to support life and, where the shipper indicates that 
toxic gas(es) may be generated, the atmosphere in the cargo hold has 
been tested for the toxic gas(es) and the concentration of the gas(es) 
is found to be less than the TLV; or
    (2) An emergency situation exists and the person entering the cargo 
hold is wearing the appropriate self-contained breathing apparatus.



Sec.  148.290  Peat moss.

    (a) Before shipment, peat moss must be stockpiled under cover to 
allow drainage and reduce its moisture content.
    (b) The cargo must be ventilated so that escaping gases cannot reach 
living quarters on or above deck.
    (c) Persons handling or coming into contact with peat moss must wear 
gloves, a dust mask, and goggles.



Sec.  148.295  Petroleum coke, calcined or uncalcined, at
55 [deg]C (131 [deg]F) or above.

    (a) This part does not apply to shipments of petroleum coke, 
calcined or uncalcined, on any vessel when the temperature of the 
material is less than 55 [deg]C (131 [deg]F).
    (b) Petroleum coke, calcined or uncalcined, or a mixture of calcined 
and uncalcined petroleum coke may not be loaded when its temperature 
exceeds 107 [deg]C (225 [deg]F).
    (c) No other hazardous materials may be stowed in any hold adjacent 
to a hold containing petroleum coke except as provided in paragraph (d) 
of this section.
    (d) Before petroleum coke at 55 [deg]C (131 [deg]F) or above may be 
loaded into a hold over a tank containing fuel or material having a 
flashpoint of less than 93 [deg]C (200 [deg]F), a 0.6 to 1.0 meter (2 to 
3 foot) layer of the petroleum coke at a temperature not greater than 43 
[deg]C (110 [deg]F) must first be loaded.
    (e) Petroleum coke must be loaded as follows:
    (1) For a shipment in a hold over a fuel tank, the loading of a 
cooler layer of petroleum coke in the hold as required by paragraph (d) 
of this section must be completed before loading the petroleum coke at 
55 [deg]C (131 [deg]F) or above in any hold of the vessel;
    (2) Upon completion of the loading described in paragraph (e)(1) of 
this section, a 0.6 to 1.0 meter (2 to 3 foot) layer of the petroleum 
coke at 55 [deg]C (131 [deg]F) or above must first be loaded into each 
hold, including those holds already containing a cooler layer of the 
petroleum coke; and
    (3) Upon completion of the loading described in paragraph (e)(2) of 
this section, normal loading of the petroleum coke may be completed.
    (f) The master of the vessel must warn members of a crew that 
petroleum coke is hot, and that injury due to burns is possible.
    (g) During the voyage, the temperature of the petroleum coke must be 
monitored often enough to detect spontaneous heating.



Sec.  148.300  Radioactive materials.

    (a) Radioactive materials that may be stowed or transported in bulk 
are limited to those radioactive materials defined in 49 CFR 173.403 as 
Low Specific Activity Material, LSA-1, or Surface Contaminated Object, 
SCO-1.
    (b) Skin contact, inhalation or ingestion of dusts generated by 
Class 7 material listed in Table 148.10 of this part must be minimized.
    (c) Each hold used for the transportation of Class 7 material 
(radioactive) listed in Table 148.10 of this part must

[[Page 88]]

be surveyed after the completion of off-loading by a qualified person 
using appropriate radiation detection instruments. Such holds must not 
be used for the transportation of any other material until the non-fixed 
contamination on any surface, when averaged over an area of 300 cm\2\, 
does not exceed the following levels:
    (1) 4.0 Bq/cm\2\ (10-4 uCi/cm\2\;) for beta and gamma 
emitters and low toxicity alpha emitters, natural uranium, natural 
thorium, uranium-235, uranium-238, thorium-232, thorium-228 and thorium-
230 when contained in ores or physical or chemical concentrates, and 
radionuclides with a half-life of less than 10 days; and
    (2) 0.4 Bq/cm\2\ (10-5 uCi/cm\2\) for all other alpha 
emitters.



Sec.  148.310  Seed cake.

    (a) This part does not apply to solvent-extracted rape seed meal, 
pellets, soya bean meal, cotton seed meal, or sunflower seed meal that--
    (1) Contains a maximum of 4 percent vegetable oil and a maximum of 
15 percent vegetable oil and moisture combined; and
    (2) As far as practical, is free from flammable solvent.
    (b) This part does not apply to mechanically expelled citrus pulp 
pellets containing not more than 2.5 percent oil and a maximum of 14 
percent oil and moisture combined.
    (c) Before loading, the seed cake must be aged per the instructions 
of the shipper.
    (d) Before loading, the shipper must give the master or person in 
charge of a barge a certificate from a competent testing laboratory 
stating the oil and moisture content of the seed cake.
    (e) The seed cake must be kept as dry as practical at all times.
    (f) If the seed cake is solvent-extracted, it must be--
    (1) As free as practical from flammable solvent; and
    (2) Stowed in a mechanically ventilated hold.
    (g) For a voyage with a planned duration greater than 5 days, the 
vessel must be equipped with facilities for introducing carbon dioxide 
or another inert gas into the hold.
    (h) Temperature readings of the seed cake must be taken at least 
once in every 24-hour period. If the temperature exceeds 55 [deg]C (131 
[deg]F) and continues to increase, ventilation to the cargo hold must be 
discontinued. If heating continues after ventilation has been 
discontinued, carbon dioxide or the inert gas required under paragraph 
(g) of this section must be introduced into the hold. If the seed cake 
is solvent-extracted, the use of inert gas must not be introduced until 
fire is apparent, to avoid the possibility of igniting the solvent 
vapors by the generation of static electricity.
    (i) Seed cake must be carried under the terms of a Special Permit 
issued by the Commandant (CG-ENG-5) per subpart B of this part if--
    (1) The oil was mechanically expelled; and
    (2) It contains more than 10 percent vegetable oil or more than 20 
percent vegetable oil and moisture combined.



Sec.  148.315  Sulfur.

    (a) This part applies to lump or coarse grain powder sulfur only. 
Fine-grained powder (``flowers of sulfur'') may not be transported in 
bulk.
    (b) After the loading or unloading of lump or coarse grain powder 
sulfur has been completed, sulfur dust must be removed from the vessel's 
decks, bulkheads, and overheads. Cargo residues and deck sweepings must 
be disposed of pursuant to 33 CFR 151.55 through 151.77.
    (c) A cargo space that contains sulfur or the residue of a sulfur 
cargo must be adequately ventilated, preferably by mechanical means. 
Each ventilator intake must be fitted with a spark-arresting screen.



Sec.  148.320  Tankage; garbage tankage; rough ammonia tankage; 
or tankage fertilizer.

    (a) This part applies to rough ammonia tankage in bulk that contains 
7 percent or more moisture by weight, and garbage tankage and tankage 
fertilizer that contains 8 percent or more moisture by weight.
    (b) Tankage to which this part applies may not be loaded in bulk if 
its temperature exceeds 38 [deg]C (100 [deg]F).

[[Page 89]]

    (c) During the voyage, the temperature of the tankage must be 
monitored often enough to detect spontaneous heating.



Sec.  148.325  Wood chips; wood pellets; wood pulp pellets.

    (a) This part applies to wood chips and wood pulp pellets in bulk 
that may oxidize, leading to depletion of oxygen and an increase in 
carbon dioxide in the cargo hold.
    (b) No person may enter a cargo hold containing wood chips, wood 
pellets, or wood pulp pellets, unless--
    (1) The atmosphere in the cargo hold has been tested and contains 
enough oxygen to support life; or
    (2) The person entering the cargo hold is wearing the appropriate 
self-contained breathing apparatus.



Sec.  148.330  Zinc ashes; zinc dross; zinc residues; zinc skimmings.

    (a) The shipper must inform the cognizant Coast Guard Captain of the 
Port in advance of any cargo transfer operations involving zinc ashes, 
zinc dross, zinc residues, or zinc skimmings (collectively, ``zinc 
material'') in bulk.
    (b) Zinc material must be aged by exposure to the elements for at 
least one year before shipment in bulk.
    (c) Before loading in bulk, zinc material must be stored under cover 
for a period of time to ensure that it is as dry as practical. No zinc 
material that is wet may be accepted for shipment.
    (d) Zinc material may not be loaded in bulk if its temperature is 
greater than 11.1 [deg]C (52 [deg]F) in excess of the ambient 
temperature.
    (e) Paragraphs (e)(1) through (e)(5) of this section apply only when 
zinc materials are carried by a cargo vessel:
    (1) Zinc material in bulk must be stowed in a mechanically 
ventilated hold that--
    (i) Is designed for at least one complete air change every 30 
minutes based on the empty hold;
    (ii) Has explosion-proof motors approved for use in Class I, 
Division 1, Group B atmospheres or equivalent motors approved by the 
vessel's flag state administration for use in hydrogen atmospheres; and
    (iii) Has nonsparking fans.
    (2) Combustible gas detectors capable of measuring hydrogen 
concentrations of 0 to 4.1 percent by volume must be permanently 
installed in holds that will carry zinc material. If the concentration 
of hydrogen in the space above the cargo exceeds 1 percent by volume, 
the ventilation system must be run until the concentration drops below 1 
percent by volume.
    (3) Thermocouples must be installed approximately 6 inches below the 
surface of the zinc material or in the space immediately above the zinc 
material. If an increase in temperature is detected, the mechanical 
ventilation system required by paragraph (d) of this section must be 
used until the temperature of the zinc material is below 55 [deg]C (131 
[deg]F).
    (4) Except as provided in paragraph (e)(5) of this section, the 
cargo hatches of holds containing zinc material must remain sealed to 
prevent the entry of seawater.
    (5) If the concentration of hydrogen is near 4.1 percent by volume 
and increasing, despite ventilation, or the temperature of the zinc 
material reaches 65 [deg]C (150 [deg]F), the cargo hatches should be 
opened provided that weather and sea conditions are favorable. When 
hatches are opened take care to prevent sparks and minimize the entry of 
water.



                Subpart F_Additional Special Requirements



Sec.  148.400  Applicability.

    Unless stated otherwise, the requirements of this subpart apply only 
to the shipment or loading of materials, listed in Table 148.10 of this 
part, for which Table 148.10 contains a reference to a section or 
paragraph of this subpart.



Sec.  148.405  Sources of ignition.

    (a) Except in an emergency, no welding, burning, cutting, chipping, 
or other operations involving the use of fire, open flame, sparks, or 
arc-producing equipment, may be performed in a cargo hold containing a 
Table 148.10 material or in an adjacent space.
    (b) A cargo hold or adjacent space must not have any flammable gas 
concentrations over 10 percent of the LFL

[[Page 90]]

before the master may approve operations involving the use of fire, open 
flame, or spark- or arc-producing equipment in that hold or adjacent 
space.



Sec.  148.407  Smoking.

    When Table 148.10 of this part associates a material with a 
reference to this section, and that material is being loaded or 
unloaded, smoking is prohibited anywhere on the weatherdeck of the 
vessel. While such a material is on board the vessel, smoking is 
prohibited in spaces adjacent to the cargo hold and on the vessel's deck 
in the vicinity of cargo hatches, ventilator outlets, and other accesses 
to the hold containing the material. ``NO SMOKING'' signs must be 
displayed in conspicuous locations in the areas where smoking is 
prohibited.



Sec.  148.410  Fire hoses.

    When Table 148.10 of this part associates a material with a 
reference to this section, a fire hose must be available at each hatch 
through which the material is being loaded.



Sec.  148.415  Toxic gas analyzers.

    When Table 148.10 of this part associates a material with a 
reference to a paragraph in this section, each vessel transporting the 
material, other than an unmanned barge, must have on board a gas 
analyzer appropriate for the toxic gas listed in that paragraph. At 
least two members of the crew must be knowledgeable in the use of the 
equipment. The equipment must be maintained in a condition ready for use 
and calibrated according to the instructions of its manufacturer. The 
atmosphere in the cargo hold and adjacent spaces must be tested before a 
person is allowed to enter these spaces. If toxic gases are detected, 
the space must be ventilated and retested before entry. The toxic gases 
for which the requirements of this section must be met are:
    (a) Arsine;
    (b) Carbon monoxide;
    (c) Hydrogen cyanide;
    (d) Hydrogen sulfide;
    (e) Phosphine; and
    (f) Sulfur dioxide.



Sec.  148.420  Flammable gas analyzers.

    When Table 148.10 of this part associates a material with a 
reference to a paragraph in this section, each vessel transporting the 
material, other than an unmanned barge, must have on board a gas 
analyzer appropriate for the flammable gas listed in that paragraph. At 
least two members of the crew must be knowledgeable in the use of the 
equipment. The equipment must be maintained in a condition ready for 
use, capable of measuring 0 to 100 percent LFL for the gas indicated, 
and calibrated in accordance with the instructions of its manufacturer. 
The atmosphere in the cargo hold must be tested before any person is 
allowed to enter. If flammable gases are detected, the space must be 
ventilated and retested before entry. The flammable gases for which the 
requirements of this section must be met are:
    (a) Carbon monoxide;
    (b) Hydrogen; and
    (c) Methane.



Sec.  148.435  Electrical circuits in cargo holds.

    During transport of a material that Table 148.10 of this part 
associates with a reference to this section, each electrical circuit 
terminating in a cargo hold containing the material must be electrically 
disconnected from the power source at a point outside of the cargo hold. 
The point of disconnection must be marked to prevent the circuit from 
being reenergized while the material is on board.



Sec.  148.445  Adjacent spaces.

    When transporting a material that Table 148.10 of this part 
associates with a reference to this section, the following requirements 
must be met:
    (a) Each space adjacent to a cargo hold must be ventilated by 
natural ventilation or by ventilation equipment safe for use in an 
explosive gas atmosphere.
    (b) Each space adjacent to a cargo hold containing the material must 
be regularly monitored for the presence of the flammable gas indicated 
by reference to Sec.  148.420 of this part. If the level of flammable 
gas in any space reaches 30 percent of the LFL, all electrical equipment 
that is not certified

[[Page 91]]

safe for use in an explosive gas atmosphere must be de-energized at a 
location outside of that space. This location must be labeled to 
prohibit reenergizing until the atmosphere in the space is tested and 
found to be less than 30 percent of the LFL.
    (c) Each person who enters any space adjacent to a cargo hold or 
compartment containing the material must wear a self-contained breathing 
apparatus unless--
    (1) The space has been tested, or is routinely monitored, for the 
appropriate flammable gas and oxygen;
    (2) The level of flammable gas is less than 10 percent of the LFL; 
and
    (3) The level of toxic gas, if required to be tested, is less than 
the TLV.
    (d) No person may enter an adjacent space if the level of flammable 
gas is greater than 30 percent of the LFL. If emergency entry is 
necessary, each person who enters the space must wear a self-contained 
breathing apparatus and caution must be exercised to ensure that no 
sparks are produced.



Sec.  148.450  Cargoes subject to liquefaction.

    (a) This section applies only to cargoes identified in Table 148.10 
of this part with a reference to this section and cargoes identified in 
the IMSBC Code (incorporated by reference, see Sec.  148.8) as cargoes 
that may liquefy.
    (b) This section does not apply to--
    (1) Shipments by unmanned barge; or
    (2) Cargoes of coal that have an average particle size of 10mm (.394 
in.) or greater.
    (c) Definitions as used in this section--
    (1) Cargo subject to liquefaction means a material that is subject 
to moisture migration and subsequent liquefaction if shipped with 
moisture content in excess of the transportable moisture limit.
    (2) Moisture migration is the movement of moisture by settling and 
consolidation of a material, which may result in the development of a 
flow state in the material.
    (3) Transportable moisture limit or TML of a cargo that may liquefy 
is the maximum moisture content that is considered safe for carriage on 
vessels.
    (d) Except on a vessel that is specially constructed or specially 
fitted for the purpose of carrying such cargoes (see also section 7 of 
the IMSBC Code, incorporated by reference, see Sec.  148.8), a cargo 
subject to liquefaction may not be transported by vessel if its moisture 
content exceeds its TML.
    (e) The shipper of a cargo subject to liquefaction must give the 
master the material's moisture content and TML.
    (f) The master of a vessel shipping a cargo subject to liquefaction 
must ensure that--
    (1) A cargo containing a liquid is not stowed in the same cargo 
space with a cargo subject to liquefaction; and
    (2) Precautions are taken to prevent the entry of liquids into a 
cargo space containing a cargo subject to liquefaction.
    (g) The moisture content and TML of a material may be determined by 
the tests described in Appendix 2, Section 1, of the IMSBC Code 
(incorporated by reference, see Sec.  148.8).

                           PART 149 [RESERVED]

[[Page 92]]



               SUBCHAPTER O_CERTAIN BULK DANGEROUS CARGOES





PART 150_COMPATIBILITY OF CARGOES--Table of Contents



Sec.
150.105 OMB control numbers assigned pursuant to the Paperwork Reduction 
          Act.
150.110 Applicability.
150.115 Definitions.
150.120 Definition of incompatible cargoes.
150.130 Loading a cargo on vessels carrying cargoes with which it is 
          incompatible.
150.140 Cargoes not listed in Table 1 or 2.
150.150 Exceptions to the compatibility chart.
150.160 Carrying a cargo as an exception to the compatibility chart.
150.170 Right of appeal.

Figure I to Part 150--Compatibility Chart
Table 1 to Part 150--Alphabetical List of Cargoes
Table 2 to Part 150--Grouping of Cargoes
Appendix I to Part 150--Exceptions to the Chart
Appendix II to Part 150--Explanation of Figure 1
Appendix III to Part 150--Testing Procedures for Determining Exceptions 
          to the Chart
Appendix IV to Part 150--Data Sheet

    Authority: 46 U.S.C. 3306, 3703; Department of Homeland Security 
Delegation No. 0170.1. Section 150.105 issued under 44 U.S.C. 3507; 
Department of Homeland Security Delegation No. 0170.1.

    Source: CGD 75-59, 45 FR 70263, Oct. 23, 1980, unless otherwise 
noted.

    Editorial Note: Nomenclature changes to part 150 appear by USCG-
2012-0832, 77 FR 59783, Oct. 1, 2012.



Sec.  150.105  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.
------------------------------------------------------------------------
Sec.   150.01-15.....................................          1625-0007
Sec.   153.5.........................................          1625-0007
Sec.   153.905.......................................          1625-0094
Sec.   153.910.......................................          1625-0094
Sec.   153.968.......................................          1625-0094
Part 154.............................................          1625-0029
Sec.   154.12........................................          1625-0007
------------------------------------------------------------------------


[49 FR 38121, Sept. 27, 1984, as amended by CGD 77-069, 52 FR 31626, 
Aug. 21, 1987; USCG-2004-18884, 69 FR 58349, Sept. 30, 2004]



Sec.  150.110  Applicability.

    This subpart prescribes rules for identifying incompatible hazardous 
materials and rules for carrying these materials in bulk as cargo in 
permanently attached tanks or in tanks that are loaded or discharged 
while aboard the vessel. The rules apply to all vessels that carry 
liquid dangerous cargoes in bulk that are subject to 46 U.S.C. Chapter 
37.

[CGD 95-028, 62 FR 51209, Sept. 30, 1997]



Sec.  150.115  Definitions.

    As used in this subpart: Hazardous material means:
    (a) A flammable liquid as defined in Sec.  30.10-22 or a combustible 
liquid as defined in Sec.  30.10-15 of this chapter;
    (b) A material listed in Table 151.05, Table 1 of part 153, or Table 
4 of part 154 of this chapter; or
    (c) A liquid, liquefied gas, or compressed gas listed in 49 CFR 
172.101.
    Person in charge means the master of a self-propelled vessel, or the 
person in charge of a barge.



Sec.  150.120  Definition of incompatible cargoes.

    Except as described in Sec.  150.150, a cargo of hazardous material 
is incompatible with another cargo listed in Table 1 if the chemical 
groups of the two cargoes have an ``X'' where their columns intersect in 
Figure 1 and are not shown as exceptions in Appendix I. (See also Sec.  
150.140.)

[CGD 83-047, 50 FR 33038, Aug. 16, 1985, as amended at USCG-2013-0423, 
85 FR 21674, Apr. 17, 2020]

[[Page 93]]



Sec.  150.130  Loading a cargo on vessels carrying cargoes with
which it is incompatible.

    Except as described in Sec.  150.160, the person in charge of a 
vessel shall ensure that the containment system for a cargo that is a 
hazardous material meets the following requirements:
    (a) The containment system must separate the hazardous material or 
its residue from any cargo in table 1 with which it is incompatible by 
two barriers such as formed by a:
    (1) Cofferdam;
    (2) Empty tank;
    (3) Void space;
    (4) Cargo handling space;
    (5) Tank containing a compatible cargo; or
    (6) Piping tunnel.
    (b) In this subpart, isolation across a cruciform joint is 
equivalent to isolation by two barriers.
    (c) The containment system for the hazardous material must not have 
a piping or venting system that connects to a containment system 
carrying a cargo with which the hazardous material is incompatible. Any 
such piping or venting system must have been separated from the 
containment system carrying the incompatible cargo by:
    (1) Removing a valve or spool piece and blanking off the exposed 
pipe ends, or
    (2) Installing two spectacle flanges in series with a means of 
detecting leakage into the pipe between the spectacle flanges.

[CGD 75-59, 45 FR 70263, Oct. 23, 1980, as amended at USCG-2013-0423, 85 
FR 21674, Apr. 17, 2020]



Sec.  150.140  Cargoes not listed in Table 1 or 2.

    A cargo of hazardous material not listed in Table I or II must be 
handled as if incompatible with all other cargoes until the Commandant 
CG-ENG-5) (Telephone 202-372-1420) assigns the hazardous material to a 
compatibility group. (Table I lists cargoes alphabetically while Table 
II lists cargoes by compatibility group).

[CGD 83-047, 50 FR 33038, Aug. 16, 1985, CGD 86-100, 52 FR 21037, June 
4, 1987; CGD 95-072, 60 FR 50465, Sept. 29, 19955; CGD 96-041, 61 FR 
50731, Sept. 27, 1996; USCG-2006-25697, 71 FR 55746, Sept. 25, 2006; 
USCG;-2013-0423, 85 FR 21674, Apr. 17, 2020]



Sec.  150.150  Exceptions to the compatibility chart.

    The Commandant (CG-ENG-5) authorizes, on a case by case basis, 
exceptions to the rules in this subpart under the following conditions:
    (a) When two cargoes shown to be incompatible in Figure 1 meet the 
standards for a compatible pair in Appendix III, or
    (b) When two cargoes shown to be compatible in Figure 1 meet the 
standards for an incompatible pair in Appendix III.
    Appendix I contains cargoes which have been found to be exceptions 
to Figure 1, the Compatibility Chart.

[CGD 83-047, 50 FR 33038, Aug. 16, 1985, as amended at CGD 95-072, 60 FR 
50465, Sept. 29, 1995; CGD 96-041, 61 FR 50731, Sept. 27, 1996]



Sec.  150.160  Carrying a cargo as an exception to the compatibility
chart.

    The Operator of a vessel having on board a cargo carried as an 
exception under Sec.  150.150 but not listed in Appendix I, Exceptions 
to the Chart, shall make sure that:
    (a) The Commandant (CG-ENG-5) has authorized by letter or message 
the cargo pair as an exception to the compatibility chart; and
    (b) A copy of the letter or message is on the vessel.

[CGD 75-59, 45 FR 70263, Oct. 23, 1980, as amended by CGD 82-063b, 48 FR 
4781, Feb. 3, 1983; CGD 83-047, 50 FR 33038, Aug. 16, 1985; CGD 95-072, 
60 FR 50465, Sept. 29, 19955; CGD 96-041, 61 FR 50731, Sept. 27, 1996]



Sec.  150.170  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 50381, Dec. 6, 1989]

[[Page 94]]



             Sec. Figure 1 to Part 150--Compatibility Chart
[GRAPHIC] [TIFF OMITTED] TC02FE91.079



         Sec. Table 1 to Part 150--Alphabetical List of Cargoes

----------------------------------------------------------------------------------------------------------------
                                            Group
              Chemical name                  No.    Footnote      CHRIS Code           Related CHRIS Codes
----------------------------------------------------------------------------------------------------------------
Acetaldehyde.............................       19  ........  AAD
Acetic acid..............................        4         2  AAC
Acetic anhydride.........................       11         2  ACA
Acetochlor...............................       10  ........  ACG
Acetone..................................       18         2  ACT
Acetone cyanohydrin......................        0      1, 2  ACY
Acetonitrile.............................       37  ........  ATN
Acetonitrile (low purity grade)..........       37         3  AIL
Acetophenone.............................       18  ........  ACP
Acid oil mixture from soyabean, corn       .......         3  .................  AOM
 (maize) and sunflower oil refining, see
 Oil, misc.: Acid mixture from soyabean,
 corn (maize), and sunflower oil refining.
Acrolein.................................       19         2  ARL
Acrylamide solution (50% or less)........       10         3  AAM                AAO
Acrylic acid.............................        4         2  ACR
Acrylic acid/ethenesulfonic (alternately        30         3  APG
 ethenesulphonic) acid copolymer with
 phosphonate groups, sodium salt solution.
Acrylonitrile............................       15         2  ACN
Acrylonitrile-Styrene copolymer                 20  ........  ALE
 dispersion in Polyether polyol.
Adiponitrile.............................       37  ........  ADN
Alachlor technical (90% or more).........       33         3  ALH                ALI
Alcohol (C12-C13, branched and linear)          41         3  ABL
 poly(4-8) propoxy sulfates (alternately
 sulphates), sodium salt 25-30% solution.
Alcohol (C9-C11) poly(2.5-9) ethoxylates.       20         3  AET                ALY/APV/APW

[[Page 95]]

 
Alcohol (C6-C17) (secondary) poly(3-6)          20         3  AEA                AEB
 ethoxylates.
Alcohol (C6-C17) (secondary) poly(7-12)         20         3  AEB                AEA
 ethoxylates.
Alcohol (C12-C16) poly(1-6) ethoxylates..       20         3  AED                AET/ALY/APW
Alcohol (C12-C16) poly(7-19) ethoxylates.       20         3  APV                AET/ALY/APV
Alcohol (C12-C16) poly(20+) ethoxylates..       20         3  APW                AET/ALY
Alcohol (C12-C15) poly (. . .)
 ethoxylate, see Alcohol (C12-C16) poly
 (. . .) ethoxylate.
Alcohol polyethoxylates..................       20  ........  .................  AEA/AEB/AED/AET/APV/APW
Alcohol polyethoxylates, secondary.......       20  ........  .................  AEA/AEB
Alcoholic beverages, n.o.s...............       20         3  ABV
Alcohols (C12+), primary, linear.........       20         3  ASY                ALR/AYK/AYL
Alcohols (C8-C11), primary, linear, and         20  ........  ALR                AYK/AYL
 essentially linear.
Alcohols (C12-C13), primary, linear, and        20         3  AYK                ALR/ASY/AYL
 essentially linear.
Alcohols (C14-C18), primary, linear, and        20         3  AYL                ALR/ASY/AYK
 essentially linear.
Alcohols (C13+)..........................       20  ........  ALY                ASY/AYK
Including:
    Cetyl alcohol (Hexadecanol)..........       20
    Oleyl alcohol (Octadecenol)..........       20
    Pentadecanol.........................       20
    Tallow alcohol.......................       20
    Tetradecanol.........................       20
    Tridecanol...........................       20
Alkanes (C10-C26), linear and branched          31         3  ABD
 (flash point 60 [deg]C).
Alkanes (C10-C26), linear and branched          31         3  ABE
 (flash point <= 60 [deg]C).
Alkanes (C6-C9)..........................       31  ........  ALK
Including:
    Heptanes.............................       31
    Hexanes..............................       31
    Nonanes..............................       31
    Octanes..............................       31
iso- & cyclo-Alkanes (C10-C11)...........       31  ........  AKI
iso- & cyclo-Alkanes (C12+)..............       31  ........  AKJ
n-Alkanes (C9-C11).......................       31         3
n-Alkanes (C10+) (all isomers)...........       31  ........  ALV                ALJ
Including:
    Decanes..............................       31
    Dodecanes............................       31
    Heptadecanes.........................       31
    n-Paraffins (C10-C20)................       31  ........  PFN                ALJ
    Tridecanes...........................       31
    Undecanes............................       31
Alkane (C14-C17) sulfonic (alternately     .......  ........  AKA                SAA (AKE/SSU)
 sulphonic) acid, sodium salt solutions,
 see Sodium alkyl (C14-C17) sulfonates
 (alternately sulphonates) (60-65%
 solution).
Alkaryl polyethers (C9-C20)..............       41  ........  AKP
Alkenoic acid, polyhydroxy ester borated.        0      1, 3  AAY
Alkenyl (C11+) amide.....................       10  ........  AKM
Alkenyl (C8+) amine, Alkenyl (C12+) acid        34  ........  AAA
 ester mixture.
Alkenyl (C16-C20) succinic anhydride.....       11  ........  AAH
Alkyl acrylate-Vinyl pyridine copolymer         32  ........  AAP
 in Toluene.
Alkyl amine (C17+).......................        7  ........  AKY
Alkylaryl phosphate mixtures (more than         34  ........  ADP
 40% Diphenyl tolyl phosphate, less than
 0.02% ortho-isomers).
Alkylated (C4-C9) hindered phenols.......       21         3  AYO
Alkyl (C3-C4) benzenes...................       32  ........  AKC
Including:
    Butylbenzenes........................       32         3
    Cumene...............................       32
    Propylbenzenes.......................       32
Alkyl (C5-C8) benzenes...................       32  ........  AKD
Including:
    Amylbenzenes.........................       32
    Heptylbenzenes.......................       32
    Hexylbenzenes........................       32
    Octylbenzenes........................       32
Alkyl (C9+) benzenes.....................       32  ........  AKB
Including:
    Decylbenzenes........................       32
    Dodecylbenzenes......................       32
    Nonylbenzenes........................       32
    Tetradecylbenzenes...................       32
    Tetrapropylbenzenes..................       32

[[Page 96]]

 
    Tridecylbenzenes.....................       32
    Undecylbenzenes......................       32
Alkyl benzene distillation bottoms.......        0      1, 3  ABB
Alkylbenzene mixtures (containing at            32         3  AZT
 least 50% of Toluene).
Alkylbenzene, Alkylindane, Alkylindene          32  ........  AIH
 mixture (each C12-C17).
Alkyl (C11-C17) benzene sulfonic                 0      1, 3  ABN                ABS/ABQ
 (alternately sulphonic) acid.
Alkylbenzene sulfonic (alternately               0      1, 2  ABQ                ABS/ABN
 sulphonic) acid (less than 4%).
Alkylbenzene sulfonic (alternately              33  ........  ABT
 sulphonic) acid, sodium salt solution.
Alkyl (C12+) dimethylamine...............        7         3  ADM
Alkyl dithiocarbamate (C19-C35)..........       34         3  ADB
Alkyl dithiothiadiazole (C6-C24).........       33  ........  ADT
Alkyl ester copolymer (C4-C20)...........       34  ........  AES                AEQ
Alkyl ester copolymer in mineral oil.....       34  ........  AEQ                AES
Alkyl (C7-C9) nitrates...................       34         2  AKN                ONE
Alkyl (C7-C11) phenol poly(4-12)                40  ........  APN                NPE
 ethoxylate.
Alkyl (C4-C9) phenols....................       21  ........  AYI                BLT/BTP/NNP/OPH
Alkyl phenol sulfide (alternately          .......  ........  .................  AKS
 sulphide) (C8-C40), see Alkyl (C8-C40)
 phenol sulfide.
Alkyl (C8-C40) phenol sulfide                   34  ........  AKS
 (alternately sulphide).
Alkyl (C9-C15) phenyl propoxylate........       40  ........  AXL
Alkyl (C8-C9) phenylamine in aromatic            9  ........  ALP
 solvents.
n-Alkyl phthalates, see individual         .......  ........  AYS
 phthalates.
Alkyl polyglucoside solution, see          .......  ........  AGD                AGL/AGM/AGN/AGO/AGP
 individual polyglucoside solutions.
Alkyl (C8-C10) polyglucoside solution           43         3  AGL                AGD/AGM/AGN/AGO/
 (65% or less).                                                                  AGP
Alkyl (C8-C10)/(C12-C14):(40% or less/60%       43         3  AGN                AGD/AGL AGM/AGO/AGP
 or more) polyglucoside solution (55% or
 less).
Alkyl (C8-C10)/(C12-C14):(50%/50%)              43         3  AGO                AGD/AGL/AGN/AGP
 polyglucoside solution (55% or less).
Alkyl (C8-C10)/(C12-C14):(60% or more/40%       43         3  AGP                AGD/AGL/AGM/AGN/AGO
 or less) polyglucoside solution (55% or
 less).
Alkyl (C12-C14) polyglucoside solution          43         3  AGM                AGD/AGL/AGN/AGO/AGP
 (55% or less).
Alkyl (C12-C16) propoxyamine ethoxylates.        8         3  AXE                LPE
Alkyl (C10-C20), saturated and                  34  ........  AKL
 unsaturated phosphite.
Alkyl succinic anhydride.................       11  ........  AUA
Alkyl sulfonic (alternately sulphonic)          34  ........  AKH
 acid ester of phenol.
Alkyl toluene............................       32  ........  AYL                AUS
Alkyl (C18+) toluenes....................       32         3  AUS                AYL
Alkyl (C18-C28) toluenesulfonic                  0      1, 3  AUU
 (alternately toluenesulphonic) acid.
Alkyl (C18-C28) toluenesulfonic                 34         3  AUB
 (alternately toluenesulphonic) acid,
 Calcium salts, borated.
Alkyl (C18-C28) toluenesulfonic                 33         3  AUC
 (alternately toluenesulphonic) acid,
 Calcium salts, high overbase.
Alkyl (C18-C28) toluenesulfonic                 33         3  AUL
 (alternately toluenesulphonic) acid,
 Calcium salts, low overbase.
Allyl alcohol............................       15         2  ALA
Allyl chloride...........................       15  ........  ALC
Aluminum (alternately, Aluminium)          .......         1  AHS                AHG
 chloride/Hydrochloric acid solution, see
 ``Aluminum (alternately, Aluminium)
 chloride/Hydrogen chloride solution''.
Aluminum (alternately Aluminium) chloride/       0      1, 3  AHG                AHS
 Hydrogen chloride solution.
Aluminum (alternately Aluminium)                 5         3  AHN
 hydroxide/sodium hydroxide/sodium
 carbonate solution (40% or less).
Aluminum sulfate (alternately Aluminium         43         2  ASX                ALM
 sulphate) solution.
Amine C-6, morpholine process residue....        9  ........  AOI
Aminoethyldiethanolamine/                        8  ........  ADY
 Aminoethylethanolamine solution.
2-(2-Aminoethoxy) ethanol................        8  ........  AEX
Aminoethylethanolamine...................        8  ........  AEE
N-Aminoethylpiperazine...................        7  ........  AEP
2-Amino-2-hydroxymethyl-1,3-propanediol         43  ........  AHL
 solution.
2-Amino-2-methyl-1-propanol..............        8  ........  APZ                APQ/APR.
Ammonia, anhydrous.......................        6  ........  AMA
Ammonia, aqueous (28% or less Ammonia),    .......  ........  .................  AMH
 see Ammonium hydroxide.
Ammonium bisulfite (alternately                 43         2  ABX                ASU
 bisulphite) solution (70% or less).
Ammonium chloride solution (less than           43         3  AIS                AMC
 25%).
Ammonium hydrogen phosphate solution.....        0         1  AMI
Ammonium hydroxide (28% or less Ammonia).        6  ........  AMH
Ammonium lignosulfonate (alternately       .......  ........  ALG                LNL
 lignosulphonate) solution, see also
 Lignin liquor.
Ammonium nitrate solution (45% or less)..        0         1  AND                AMN/ANR/ANW
Ammonium nitrate solution (93% or less)..        0         1  ANW                AMN/AND/ANR
Ammonium nitrate/Urea solution             .......  ........  .................  UAS (ANU/UAT/UAU/UAV)
 (containing Ammonia), see Urea/Ammonium
 nitrate solution (containing 1% or more
 Ammonia).

[[Page 97]]

 
Ammonium nitrate/Urea solution (not        .......  ........  .................  UAU (ANU/UAS/UAT/UAV)
 containing Ammonia), see Urea/Ammonium
 nitrate solution (containing less than
 1% Ammonia).
Ammonium phosphate/Urea solution, see      .......  ........  .................  UAP (APP/URE)
 Urea/Ammonium phosphate solution.
Ammonium polyphosphate solution..........       43  ........  AMO
Ammonium sulfate (alternately sulphate)         43  ........  ASW                AME/AMS
 solution.
Ammonium sulfate (alternately sulphate)         43  ........  AME                AMS/ASW
 solution (20% or less).
Ammonium sulfide (alternately sulphide)          5         3  ASS                ASF
 solution (45% or less).
Ammonium thiocyanate/Ammonium thiosulfate        0         1  ACV                ACS
 (alternately thiosulphate) solution.
Ammonium thiosulfate (alternately               43         3  ATV                ATF
 thiosulphate) solution (60% or less).
Amyl acetate (all isomers)...............       34         3  AEC                IAT/AML/AAS/AYA
Amyl acid phosphate......................       34  ........  AIA
Amyl alcohol, primary....................       20         3  APM                AAI/AAL/AAN/APM/IAA
n-Amyl alcohol...........................       20         3  AAN                AAI/AAL/APM/ASE/IAA
sec-Amyl alcohol.........................       20         3  ASE                AAI/AAL/AAN/APM/IAA
tert-Amyl alcohol........................       20         3  AAL                AAI/APM/ASE/IAA
tert-Amyl methyl ether...................       41  ........  AYE
Amyl methyl ketone, see Methyl amyl        .......  ........  AMJ                MAK (AMK)
 ketone.
Amylene, see Pentene (all isomers).......  .......  ........  AMW                PTX (AMX/AMZ/PTE)
tert-Amylenes, see Pentene (all isomers).  .......  ........  AMZ                PTX (AMW)
Aniline..................................        9  ........  ANL
Animal and Fish oils, n.o.s..............       34  ........  AFN
Including:
    Cod liver oil........................       34
    Lanolin..............................       34
    Neatsfoot oil........................       34
    Pilchard oil.........................       34
    Sperm oil............................       34
Animal and Fish acid oils and                   34  ........  AFA
 distillates, n.o.s..
Including:
    Animal acid oil......................       34
    Fish acid oil........................       34
    Lard acid oil........................       34
    Mixed acid oil.......................       34
    Mixed general acid oil...............       34
    Mixed hard acid oil..................       34
    Mixed soft acid oil..................       34
Anthracene oil (Coal tar fraction), see    .......  ........  AHO                COR
 Coal tar.
Apple juice..............................       43  ........  APJ
Argon, liquefied.........................        0         1  ARG
Aryl polyolefin (C11-C50)................       30  ........  AYF.
Asphalt..................................       33  ........  ASP                ACU.
Asphalt blending stocks, roofers flux....       33  ........  ARF
Asphalt blending stocks, straight run           33  ........  ASR
 residue.
Asphalt emulsion.........................       33  ........  ASQ
Asphalt, Kerosene, and other components..       33  ........  AKO
Aviation alkylates (C8 paraffins and            33         3  AVA                GAK/GAV
 isoparaffins BPT 95-120 [deg]C).
Barium long-chain (C11-C50) alkaryl             34  ........  BCA
 sulfonate (alternately sulphonate).
Barium long-chain alkyl (C8-C14) phenate        34  ........  BCH
 sulfide (alternately sulphide).
Behenyl alcohol..........................       20  ........  BHY
Benzene..................................       32         2  BNZ                BHA/BHB/PYG.
Benzene and mixtures having 10% Benzene         32  ........  BHB                BHA/BNZ/PYG.
 or more.
Benzene hydrocarbon mixtures (containing        32  ........  BHA                BHB/BNZ/PYG
 Acetylenes) (having 10% Benzene or more).
Benzene/Toluene/Xylene mixtures (having         32  ........  BTX                BHB/BNZ/PYG/TOL/XLX/XLM/XLO/XLP
 10% Benzene or more).
Benzenesulfonyl (alternately                     0      1, 2  BSC
 Benzenesulphonyl) chloride.
Benzenetricarboxylic acid, trioctyl ester       34  ........  BCE
Benzyl acetate...........................       34  ........  BZE
Benzyl alcohol...........................       21  ........  BAL
Benzyl chloride..........................       36  ........  BCL
Bio-fuel blends of Diesel/gas oil and           33         3  BIF                BIG/BIH/BII/BIJ/BIK
 Alkanes (C10-C26), linear and branched
 with a flash point 60 [deg]C
 (25% but <99% by volume).
Bio-fuel blends of Diesel/gas oil and           33         3  BIG                BIF/BIH/BII/BIJ/BIK
 Alkanes (C10-C26), linear and branched
 with a flash point <= 60 [deg]C (25% but <99% by volume).
Bio-fuel blends of Diesel/gas oil and           34         3  BIH                BIF/BIG/BII/BIJ/BIK
 FAME (25% but <99% by volume).
Bio-fuel blends of Diesel/gas oil and           34         3  BII                BIF/BIG/BIH/BIJ/BIK
 vegetable oil (25% but <99%
 by volume).
Bio-fuel blends of Gasoline and Ethyl           20      2, 3  BIJ                BIF/BIG/BIH/BII/BIK
 alcohol (25% but <99% by
 volume).

[[Page 98]]

 
Bis (2-ethylhexyl) terephthalate.........       34  ........  DHH
Boronated Calcium sulfonate (alternately        34  ........  BCU
 sulphonate).
Brake fluid base mix: Poly(2-8)alkylene         20         3  BFY
 (C2-C3) glycols/Polyalkylene (C2-C10)
 glycols monoalkyl (C1-C4) ethers and
 their borate esters.
Brominated Epoxy Resin in Acetone........       16  ........  BER
Bromochloromethane.......................       36  ........  BCM
Butadiene (all isomers)..................       30  ........  BDI
Butadiene/Butylene mixtures (containing         30  ........  BBM                BBX/BDI/BTN/IBL.
 Acetylenes).
Butane (all isomers).....................       31  ........  BMX                IBT/BUT.
Butane/Propane mixture...................       31  ........  BUP                LPG
1,4-Butanediol, see Butylene glycol......  .......  ........  BDO                BUG
2-Butanone, see Methyl ethyl ketone......  .......         2  .................  MEK
Butene oligomer..........................       30  ........  BOL
Butene, see Butylenes (all isomers)......  .......  ........  .................  BUT/IBL
2-Butoxyethanol (58%)/Hyperbranched             20
 polyesteramide (42%) (mixture).
Butyl acetate (all isomers)..............       34         3  BAX                BCN/BTA/BYA/IBA
Butyl acrylate (all isomers).............       14         3  BAR                BAI/BTC
Butyl alcohol (all isomers)..............       20         2  BAY                BAN/BAS/BAT/IAL
Butyl alcohol (iso-, n-, sec-, tert-),     .......         2  .................  BAN/BAS/BAT/BAY/IAL
 see Butyl alcohol (all isomers).
Butylamine (all isomers).................        7         3  BTY                BAM/BTL/BUA/IAM
Butylbenzene (all isomers), see Alkyl (C3- .......         3  BBE                AKC
 C4) benzenes.
Butyl benzyl phthalate...................       34  ........  BPH
Butyl butyrate (all isomers).............       34         3  BBA                BIB/BUB
Butylene glycol..........................       20         2  BUG                BDO
1,2-Butylene oxide.......................       16  ........  BTO
Butylenes (all isomers)..................       30  ........  BTN                IBL
n-Butyl ether............................       41         3  BTE
n *-Butyl ether..........................       41  ........  BTE
iso-Butyl formate, see Isobutyl formate..  .......         3  BFI                BFN/BFO
n-Butyl formate..........................       34  ........  BFN                BFI/BFO.
Butyl heptyl ketone......................       18  ........  BHK
Butyl methacrylate.......................       14  ........  BMH                BMI/BMN.
Butyl methacrylate, Decyl methacrylate,    .......         3  .................  DER (BMH/BMI/BMN/CEM)
 Cetyl-Eicosyl methacrylate mixture, see
 Butyl/Decyl/Cetyl/Eicosyl methacrylate
 mixture.
Butyl/Decyl/Cetyl/Eicosyl methacrylate          14         3  DER                BMH/BMI/BMN/CEM
 mixture.
Butyl methyl ketone, see Methyl butyl      .......         2  .................  MBJ (MBK/MIK)
 ketone.
Butyl phenol, Formaldehyde resin in             32
 Xylene.
n-Butyl propionate.......................       34  ........  BPN
Butyl stearate...........................       34  ........  BST
Butyl toluene............................       32  ........  BUE
Butyraldehyde (all isomers)..............       19         3  BAE                BAD/BTR
Butyric acid.............................        4  ........  BRA                IBR.
gamma-Butyrolactone......................        0      1, 2  BLA
C9 Resinfeed (DSM).......................       32         2  CNR
Calcium alkaryl sulfonate (alternately     .......         3  CAE                CAY
 sulphonate) (C11-C50), see Calcium long-
 chain alkaryl sulfonate (alternately
 sulphonate) (C11-C50).
Calcium alkyl (C9) phenol sulfide               34  ........  CPX.
 (alternately sulphide), polyolefin
 phosphorosulfide (alternately
 phosphorosulphide) mixture.
Calcium alkyl (C10-C28) salicylate.......       34         3  CAJ.
Calcium bromide solution, see Drilling     .......  ........  CBI                DRB
 brines.
Calcium alkyl salicylate, see Calcium           34  ........  .................  CAJ/CAK/CAZ.
 long-chain alkyl salicylate (C13 + ),
 Calcium long-chain alkyl (C18-C28)
 salicylate, or Calcium alkyl (C10-C28)
 salicylate.
Calcium bromide solution, see Drilling     .......  ........  CBI                DRB
 brines.
Calcium bromide/Zinc bromide solution,     .......  ........  .................  DZB
 see Drilling brine (containing Zinc
 salts).
Calcium carbonate slurry.................       34  ........  CSR
Calcium chloride solution, see Drilling    .......  ........  CCS                CLC
 brines.
Calcium hydroxide slurry.................        5  ........  COH                CAH.
Calcium hypochlorite solution (15% or            5         3  CHU                CHY/CHZ
 less).
Calcium hypochlorite solution (more than         5         3  CHZ                CHU/CHY
 15%).
Calcium lignosulfonate (alternately        .......  ........  CLL                LNL
 lignosulphonate) solution, see also
 Lignin liquor.
Calcium long-chain alkaryl sulfonate            34  ........  CAY
 (alternately sulphonate) (C11-C50).
Calcium long-chain alkyl (C8-C40)          .......  ........  CAQ                CAU/CAV (CAN/CAW)
 phenate, see Calcium long-chain alkyl
 (C5-C10) phenate or Calcium long-chain
 alkyl (C11-C40) phenate.
Calcium long-chain alkyl (C5-C10) phenate       34         3  CAU                CAN/CAQ/CAV/CAW
Calcium long-chain alkyl (C5-C20) phenate       34  ........  CAV                CAN/CAQ/CAU/CAW
Calcium long-chain alkyl (C11-C40)              34         3  CAW                CAN/CAQ/CAU/CAV
 phenate.
Calcium long-chain alkyl phenate sulfide        34  ........  CPI
 (alternately sulphide) (C8-C40).
Calcium long-chain alkyl phenolic amine          9  ........  CPQ
 (C8-C40).
Calcium long-chain alkyl (C18-C28)              34         3  CAJ
 salicylate.

[[Page 99]]

 
Calcium long-chain alkyl salicylate             34  ........  CAK                CAJ/CAZ
 (C13+).
Calcium nitrate solutions (50% or less)..       34         3  CNU                CNT
Calcium nitrate/Magnesium nitrate/              34  ........  CLM                CNT/CNU/MGN/MGO/PCS/PCU/PSD.
 Potassium chloride solution.
Calcium salts of fatty acids.............       34  ........  CFF
Calcium stearate.........................       34  ........  CSE
Calcium sulfonate (alternately                  33  ........  CSH
 sulphonate)/Calcium carbonate/
 Hydrocarbon solvent mixture.
Camelina oil, see Oil, misc.: Camelina...  .......         3  CEL
Camphor oil (light)......................       18  ........  CPO
Canola oil, see Oil, edible: Rapeseed      .......  ........  .................  ORO (ORP)
 (low erucic acid containing less than 4%
 free fatty acids).
Caprolactam solution, see epsilon-         .......  ........  CLS
 Caprolactam (molten or aqueous
 solutions).
epsilon-Caprolactam (molten or aqueous          22         3  CLU                CLS
 solutions).
Caramel solutions........................       43  ........  CML
Carbolic oil.............................       21  ........  CBO
Carbon dioxide (high purity).............        0         1  CDH                CDO/CDQ
Carbon dioxide (reclaimed quality).......        0         1  CDQ                CDH/CDO
Carbon dioxide, liquefied................        0         1  CDO                CDH/CDQ
Carbon disulfide (alternately disulphide)       38  ........  CBB
Carbon tetrachloride.....................       36         2  CBT                CBU
Cashew nut shell oil (untreated), see      .......  ........  .................  OCN
 Oil, misc.: Cashew nut shell (untreated).
Castor oil, see Oil, edible: Castor......       34  ........  .................  OCA (VEO).
Catoxid feedstock........................       36         2  CXF
Caustic potash solution..................        5         2  CPS
Caustic soda solution....................        5         2  CSS
Cesium formate solution..................       43         3  CSM
Cetyl alcohol (Hexadecanol), see Alcohols  .......  ........  .................  ALY (ASY/AYL)
 (C13+).
Cetyl alcohol, see Alcohols (C13 + ).....       20  ........  .................  ALY (ASY/AYL).
Cetyl/Eicosyl methacrylate mixture.......       14         1  CEM
Cetyl/Stearyl alcohol, see Alcohols        .......  ........  .................  ALY (ASY/AYL)
 (C13+).
Chlorinated paraffins (C10-C13)..........       36  ........  CLH                CLG/CLJ/CLQ.
Chlorinated paraffins (C14-C17) (with 50%       36         3  CLJ                CLG/CLH/CLQ
 Chlorine or more, and less than 1% C13
 or shorter chains).
Chlorinated paraffins (C14-C17) (with 52%       36  ........  CLQ                CLG/CLH/CLJ.
 Chlorine).
Chlorinated paraffins (C18+) with any           36  ........  CLG                CLH/CLJ
 level of chlorine.
Chlorine.................................        0         1  CLX
Chloroacetic acid (80% or less)..........        4         3  CHM                CHL/MCA
Chlorobenzene............................       36         2  CRB
Chlorodifluoromethane, see                 .......  ........  MCF
 Monochlorodifluoromethane.
2-Chloro-4-ethylamino-6-isopropylamino-5-        0         1  CET
 triazine solution.
1-(4-Chlorophenyl)-4,4-dimethyl pentan-3-       18         2  CDP
 one.
2- or 3-Chloropropionic acid.............        4  ........  CPM                CLA/CLP
Chloroform...............................       36  ........  CRF
Chlorohydrins (crude)....................       17         3  CHD
4-Chloro-2-methylphenoxyacetic acid,             9  ........  CDM
 dimethylamine salt solution.
o-Chloronitrobenzene.....................       42  ........  CNO                CNP
Chlorosulfonic (alternately                      0         1  CSA
 Chlorosulphonic) acid.
m-Chlorotoluene..........................       36         3  CTM                CHI/CRN/CTO
o-Chlorotoluene..........................       36         3  CTO                CHI/CRN/CTM
p-Chlorotoluene..........................       36         3  CRN                CHI/CTM/CTO
Chlorotoluenes (mixed isomers)...........       36         3  CHI                CRN/CTM/CTO
Choline chloride solutions...............       20  ........  CCO
Citric acid (70% or less)................        4         3  CIS                CIT
Clay slurry..............................       43  ........  CLY
Coal slurry..............................       43  ........  COG                COA.
Coal tar.................................       33  ........  COR                OCT.
Coal tar crude bases.....................       33  ........  CTB
Coal tar distillate, see Naphtha: Coal     .......  ........  CDL                NCT (CTU)
 tar solvent.
Coal tar naphtha solvent, see Naphtha:     .......  ........  .................  NCT (CDL/CTU)
 Coal tar solvent.
Coal tar pitch (molten)..................       33         3  CTP
Coal tar, high temperature...............       33  ........  CHH
Cobalt naphthenate in solvent naphtha....       34  ........  CNS
Cocoa butter, see Oil, edible: Cocoa       .......  ........  .................  OCB (VEO)
 butter.
Coconut oil, see Oil, edible: Coconut....  .......  ........  .................  OCC (VEO)
Coconut oil, fatty acid, see Oil, misc.:   .......         2  .................  CFA
 Coconut fatty acid.
Coconut oil, fatty acid methyl ester, see  .......         3  .................  OCM
 Oil, misc.: Coconut fatty acid methyl
 ester.
Copper salt of long-chain (C17 + )              34  ........  CUS                CFT.
 alkanoic acid.
Copper salt of long-chain (C3-C16) fatty        34  ........  CFT                CUS.
 acid.
Corn oil, see Oil, edible: Corn..........  .......  ........  .................  OCO (VEO)

[[Page 100]]

 
Corn syrup...............................       43  ........  CSY
Cottonseed oil, see Oil, edible:           .......  ........  .................  OCS (VEO)
 Cottonseed.
Cottonseed oil, fatty acid, see Oil,       .......  ........  CFY
 misc.: Cottonseed oil, fatty acid.
Creosote.................................       21         2  CCW                CCT/CWD
Creosote (coal tar)......................       21      2, 3  CCT                CCW
Creosote (wood tar)......................       21      2, 3  CWD                CCT/CCW
Cresols (all isomers)....................       21         3  CRS                CFO/CFP/CRL/CRO/CSC/CSO
Cresols with 5% or more Phenol, see        .......  ........  CFP                PHN (CFO/CRL/CRO/CRS/CSO)
 Phenol.
Cresols with less than 5% Phenol, see      .......  ........  CFO                CRS (CFP/CRL/CRO/CSO)
 Cresols (all isomers).
Cresylate spent caustic, see Cresylic      .......         2  CSC                CYD
 acid, sodium salt solution.
Cresylic acid............................       21  ........  CRY
Cresylic acid, dephenolized..............       21  ........  CAD                CRY/CYN
Cresylic acid tar........................       21  ........  CRX
Cresylic acid with 5% or more phenol.....       21  ........  CYN                CAD/CRY
Cresylic acid, sodium salt solution......        5         2  CYD                CSC
Crotonaldehyde...........................       19         2  CTA
Crude Isononylaldehyde, see                .......  ........  .................  INC
 Isononyldehyde (crude).
Crude Isopropanol........................       20  ........  .................  IPB (IPA/PAL)
Crude Piperazine, see Piperazine (crude).  .......  ........  .................  PZC (PPZ/PIZ)
Cumene, see Alkyl(C3-C4) benzenes........  .......  ........  CUM                AKD (PBY/PBZ)
1,5,9-Cyclododecatriene..................       30  ........  CYT
Cycloheptane.............................       31  ........  CYE
Cyclohexane..............................       31  ........  CHX
Cyclohexanol.............................       20  ........  CHN
Cyclohexanone............................       18         2  CCH
Cyclohexanone/Cyclohexanol mixtures......       18         2  CYX
Cyclohexyl acetate.......................       34  ........  CYC
Cyclopentadiene/Styrene/Benzene mixture..       30  ........  CSB
1,3-Cyclopentadiene dimer (molten).......       30         3  CPD                DPT/DPV
Cyclopentane.............................       31  ........  CYP
Cyclopentene.............................       30  ........  CPE.
p-Cymene.................................       32  ........  CMP
Decahydronaphthalene.....................       33  ........  DHN
Decaldehyde..............................       19  ........  DAY                IDA/DAL.
iso-Decaldehyde, see Isodecaldehyde.
n-Decaldehyde............................       19
Decane (all isomers), see n-Alkanes        .......  ........  DCC                ALV (ALJ)
 (C10+) (all isomers).
Decanoic acid............................        4  ........  DCO                NEA.
Decene...................................       30  ........  DCE
Decyl acetate............................       34  ........  DYA
Decyl acrylate...........................       14  ........  DAT                IAI/DAR.
Decyl alcohol (all isomers)..............       20      2, 3  DAX                ISA/DAN
Decyl/Dodecyl/Tetradecyl alcohol mixture.       20         3  DYO                DAN/DAX/DDN/ISA
Decylbenzene, see Alkyl (C9+) benzenes...  .......  ........  DBZ                AKB
Decyloxytetrahydrothiophene dioxide......        0         1  DHT
Detergent alkylate.......................       32  ........  DKY                AKB/DBZ/DDB/TDB/TRB/UDB.
Dextrose solution, see Glucose solution..  .......  ........  DTS                GLU
Diacetone alcohol........................       20         2  DAA
Dialkyl (C10-C14) benzenes, see Alkyl      .......  ........  DAB                AKB
 (C9+) benzenes.
Dialkyl(C8-C9) diphenylamines............        9  ........  DAQ
Dialkyl (C7-C13) phthalates..............       34  ........  DAH
Including:
    Di-(2-ethylhexyl) phthalate..........       34
    Diheptyl phthalate...................       34
    Dihexyl phthalate....................       34
    Diisooctyl phthalate.................       34
    Diisodecyl phthalate.................       34
    Diisononyl phthalate.................       34
    Dinonyl phthalate....................       34
    Dioctyl phthalate....................       34
    Ditridecyl phthalate.................       34
    Diundecyl phthalate..................       34
Dialkyl (C9-C10) phthalates, see Dialkyl   .......  ........  DLK                DLH (DAP/DHL/DHP/DID/DIE/DIF/
 (C7-C13) phthalates.                                                             DIN/DIO/DIT/DOP/DPA/DTP/DUP)
Dialkyl thiophosphates sodium salts             34         3  DYH
 solution.
Dibromomethane...........................       36  ........  DBH
Dibutyl carbinol, see Nonyl alcohol (all   .......  ........  .................  NNS (DBC/NNI/NNN)
 isomers).

[[Page 101]]

 
Dibutyl hydrogen phosphonate.............       34  ........  DHD
Dibutyl phthalate........................       34  ........  DPA                DIT
Dibutyl terephthalate....................       34         3  DYE
Dibutylamine.............................        7  ........  DBA
Dibutylphenols...........................       21  ........  DBT
Di-tert-butylphenol......................       21  ........  DBF                DBT/DBV/DBW
2,4-Di-tert-butylphenol..................       21  ........  DBV                DBF/DBT/DBW
2,6-Di-tert-butylphenol..................       21         3  DBW                DBF/DBT/DBV
Dichlorobenzene (all isomers)............       36         3  DBX                DBM/DBO/DBP
3,4-Dichloro-1-butene....................       36  ........  DCD                DCB.
Dichlorodifluoromethane..................       36  ........  DCF
1,1-Dichloroethane.......................       36  ........  DCH
Dichloroethyl ether......................       41         3  DYR                DEE
1,6-Dichlorohexane.......................       36  ........  DHX
2,2[min]-Dichloroisopropyl ether.........       41  ........  DCI
Dichloromethane..........................       36         2  DCM
2,4-Dichlorophenol.......................       21  ........  DCP
2,4-Dichlorophenoxyacetic acid/                 43  ........  DDE
 Diethanolamine salt solution.
2,4-Dichlorophenoxyacetic acid/                  0   1, 2, 3  DDA                DAD/DSX
 Dimethylamine salt solution (70% or
 less).
2,4-Dichlorophenoxyacetic acid/                 43         2  DTI
 Triisopropanolamine salt solution.
1,1-Dichloropropane......................       36  ........  DPB                DPC/DPL/DPP/DPX
1,2-Dichloropropane......................       36      2, 3  DPP                DPB/DPC/DPL/DPX
1,3-Dichloropropane......................       36  ........  DPC                DPB/DPL/DPP/DPX
Dichloropropene (all isomers)............       15  ........  DCW                DPF/DPU.
1,3-Dichloropropene......................       15  ........  .................  DCW/DPF.
Dichloropropene/Dichloropropane mixtures.       15  ........  DMX                DCW/DPB/DPC/DPL/DPP/DPU/DPX.
2,2-Dichloropropionic acid...............        4  ........  DCN
Dicyclopentadiene, Resin Grade, 81-89%...       30         3  DPV                CPD/DPT
Dicyclopentadiene, see 1,3-                .......  ........  DPT                CPD (DPV)
 Cyclopentadiene dimer (molten).
Diethanolamine...........................        8         2  DEA
Diethanolamine salt of 2,4-                .......  ........  DZZ                DDE
 Dichlorophenoxyacetic acid solution, see
 2,4-Dichlorophenoxyacetic acid,
 Diethanolamine salt solution.
Diethylamine.............................        7  ........  DEN
Diethylaminoethanol......................        8  ........  DAE
2,6-Diethylaniline.......................        9  ........  DMN                DIY.
Diethylbenzene...........................       32  ........  DEB
Diethylene glycol........................       40         2  DEG
Diethylene glycol butyl ether, see Poly(2- .......  ........  DME                PAG
 8)alkylene glycol monoalkyl (C1-C6)
 ether.
Diethylene glycol butyl ether acetate,     .......  ........  DEM                PAF
 see Poly(2-8)alkylene glycol monoalkyl
 (C1-C6) ether acetate.
Diethylene glycol dibenzoate.............       34  ........  DGZ
Diethylene glycol dibutyl ether..........       40  ........  DIG
Diethylene glycol diethyl ether..........       40  ........  DGS
Diethylene glycol ethyl ether, see Poly(2- .......  ........  DGE                PAG
 8)alkylene glycol monoalkyl (C1-C6)
 ether.
Diethylene glycol ethyl ether acetate,     .......  ........  DGA                PAF
 see Poly(2-8)alkylene glycol
 monoalkyl(C1-C6) ether acetate.
Diethylene glycol n-hexyl ether, see       .......  ........  DHE                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Diethylene glycol methyl ether, see        .......  ........  DGM                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Diethylene glycol methyl ether acetate,    .......  ........  DGR                PAF
 see Poly(2-8)alkylene glycol
 monoalkyl(C1-C6) ether acetate.
Diethylene glycol phenyl ether...........       40  ........  DGP
Diethylene glycol phthalate..............       34  ........  DGL
Diethylene glycol propyl ether, see        .......  ........  DGO                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Diethylenetriamine.......................        7         2  DET
Diethylenetriaminepentaacetic acid,             43  ........  DYS
 pentasodium salt solution.
Diethylethanolamine, see                   .......  ........  .................  DAE
 Diethylaminoethanol.
Diethyl ether............................        8  ........  EET
Diethyl hexanol, see Decyl alcohol (all    .......  ........  .................  DAX
 isomers).
Di-(2-ethylhexyl) adipate................       34  ........  DEH
Di-(2-ethylhexyl) phosphoric acid........        1  ........  DEP
Di-(2-ethylhexyl) phthalate, see Dialkyl   .......  ........  DIE                DAH
 (C7-C13) phthalate.
Di-(2-ethylhexyl) terephthalate..........       34  ........  DHH
Diethyl phthalate........................       34  ........  DPH
Diethyl sulfate (alternately sulphate)...       34  ........  DSU
Diglycidyl ether of Bisphenol A..........       16  ........  BDE
Diglycidyl ether of Bisphenol F..........       16  ........  DGF
Diheptyl phthalate, see Dialkyl (C7-C13)   .......  ........  DHP                DAH
 phthalate.

[[Page 102]]

 
Di-n-hexyl adipate.......................       34  ........  DHA
Dihexyl phthalate, see Dialkyl (C7-C13)    .......  ........  DHL
 phthalate.
Diisobutyl carbinol, see Nonyl alcohol     .......  ........  DBC                NNS
 (all isomers).
Diisobutyl ketone........................       18  ........  DIK
Diisobutyl phthalate.....................       34  ........  DIT                DPA
Diisobutylamine..........................        7  ........  DBU
Diisobutylene............................       30  ........  DBL
Diisodecyl phthalate, see Dialkyl (C7-     .......  ........  DID                DAH
 C13) phthalates.
1,4-Dihydro-9,10-dihydroxy anthracene,           5  ........  DDH
 disodium salt solution.
Diisononyl adipate.......................       34  ........  DNY
Diisononyl phthalate, see Dialkyl (C7-     .......         2  DIN                DAH
 C13) phthalates.
Diisooctyl phthalate, see Dialkyl (C7-     .......  ........  DIO                DAH/(DIE/DOP)
 C13) phthalate.
Diisopropanolamine.......................        8  ........  DIP
Diisopropylamine.........................        7  ........  DIA                DNA.
Diisopropylbenzene (all isomers).........       32  ........  DIX
Diisopropylnaphthalene...................       32  ........  DII
1,4-Dihydro-9,10-dihydroxy anthracene,           5  ........  DDH
 disodium salt solution.
N,N-Dimethylacetamide....................       10  ........  DAC                DLS
N,N-Dimethylacetamide solution (40% or          10         3  DLS                DAL.
 less).
Dimethyl adipate.........................       34  ........  DLA
Dimethylamine............................        7  ........  DMA                DMC/DMG/DMY.
Dimethylamine salt of 4-Chloro-2-          .......  ........  .................  CDM
 methylphenoxyacetic acid solution, see 4-
 Chloro-2-methylphenoxyacetic acid,
 Dimethylamine salt solution.
Dimethylamine salt of 2,4-                 .......  ........  DAD                DDA (DSX)
 Dichlorophenoxyacetic acid solution, see
 2,4-Dichlorophenoxyacetic acid,
 Dimethylamine salt solution (70% or
 less).
Dimethylamine solution (45% or less).....        7         3  DMG                DMA/DMC/DMY
Dimethylamine solution (greater than 45%         7         3  DMY                DMA/DMC/DMG
 but not greater than 55%).
Dimethylamine solution (greater than 55%         7         3  DMC                DMA/DMG/DMY
 but not greater than 65%).
2,6-Dimethylaniline......................        9  ........  DMM                DDL
Dimethylbenzene, see Xylenes.............  .......         2  .................  XLX/XLM/XLO/XLP
Dimethylcyclicsiloxane hydrolyzate.......       34  ........  DXZ
N,N-Dimethylcyclohexylamine..............        7  ........  DXN
Dimethyl disulfide (alternately                  0   1, 2, 3  DSK
 disulphide).
Dimethyldodecylamine, see N,N-                   7  ........  .................  DDY.
 Dimethyldodecylamine.
N,N-Dimethyldodecylamine.................        7  ........  DDY
Dimethylethanolamine.....................        8  ........  DMB
Dimethyl ether...........................       41  ........  DIM
Dimethylformamide........................       10         2  DMF
Dimethyl furan...........................       41  ........  DFU
Dimethyl glutarate.......................       34  ........  DGT
Dimethyl hydrogen phosphite..............       34         2  DPI
Dimethyl naphthalene sulfonic                   34         2  DNS
 (alternately sulphonic) acid, sodium
 salt solution.
Dimethyl octanoic acid...................        4  ........  DMO
Dimethyl phthalate.......................       34  ........  DTL
Dimethylpolysiloxane, see                  .......  ........  DMP
 Polydimethylsiloxane.
2,2-Dimethylpropane-1,3-diol (molten or         20         3  DDI
 solution).
Dimethyl succinate.......................       34  ........  DSE
Dinitrotoluene (molten)..................       42         3  DNM                DNL/DNU/DTT
Dinonyl phthalate, see Dialkyl (C7-C13)    .......  ........  DIF                DAH
 phthalates.
Dioctyl phthalate, see Dialkyl (C7-C13)    .......  ........  DOP                DAH (DIE/DIO)
 phthalates.
1,4-Dioxane..............................       41  ........  DOX
Dipentene................................       30  ........  DPN
Diphenyl.................................       32  ........  DIL
Diphenylamine (molten)...................        9  ........  DAG                DAM.
Diphenylamine, reaction product with             9  ........  DAK
 2,2,4-trimethylpentene.
Diphenylamines, alkylated................        9  ........  DAJ
Diphenyl/Diphenyl ether mixtures.........       33  ........  DDO
Diphenyl ether...........................       41  ........  DPE
Diphenyl ether/Biphenyl ether mixture,     .......  ........  .................  DDO
 see Diphenyl/Diphenyl ether mixture.
Diphenyl ether/Diphenyl phenyl ether            41  ........  DOB
 mixture.
Diphenylmethane diisocyanate.............       12         2  DPM
Diphenyl oxide, see Diphenyl ether.......  .......  ........  .................  DPE
Diphenylol propane-Epichlorohydrin resins        0         1  DPR
Di-n-propylamine.........................        7  ........  DNA                DIA
Dipropylene glycol.......................       40  ........  DPG
Dipropylene glycol butyl ether, see        .......  ........  DBG                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Dipropylene glycol dibenzoate............       34  ........  DGY
Dipropylene glycol methyl ether, see       .......  ........  DPY                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Distillates, flashed feed stocks.........       33  ........  DFF

[[Page 103]]

 
Distillates, straight run................       33  ........  DSR
Di-tert-butyl phenol.....................       21  ........  DBF                DBT/DBV/DBW.
2,4-Di-tert-butyl phenol.................       21  ........  DBV                DBF/DBT/DBW.
2,6-Di-tert-butyl phenol.................       21  ........  DBW                DBF/DBT/DBV.
Dithiocarbamate ester (C7-C35)...........       34  ........  DHO
Ditridecyl adipate.......................       34  ........  DTY
Ditridecyl phthalate, see Dialkyl (C7-     .......  ........  DTP                DAH
 C13) phthalate.
Diundecyl phthalate, see Dialkyl (C7-C13)  .......  ........  DUP                DAH
 phthalates.
Dodecane (all isomers), see n-Alkanes      .......  ........  DOF                ALV (ALJ/DOC)
 (C10+) (all isomers).
tert-Dodecanethiol.......................       20         2  DDL                LRM
Dodecene (all isomers)...................       30         3  DOZ                DDC/DOD
Dodecanol (all isomers), see Dodecyl       .......         2  DDN                LAL
 alcohol (all isomers).
2-Dodecenylsuccinic acid, dipotassium           34  ........  DSP
 salt solution.
Dodecyl alcohol (all isomers)............       20         2  DDN                ASK/ASY/LAL
Dodecylamine/Tetradecylamine mixture.....        7         2  DTA
Dodecylbenzene, see Alkyl (C9+)..........
Dodecylbenzenesulfonic (alternately              0      1, 2  DSA
 Dedecylbenzenesulphonic) acid.
Dodecyldimethylamine/                            7  ........  DOT
 Tetradecyldimethylamine mixture.
Dodecyl diphenyl ether disulfonate              43  ........  DTA
 (alternately disulphonate) solution.
Dodecyl hydroxypropyl sulfide                    0         1  DOH
 (alternately sulphide).
Dodecyl methacrylate.....................       14  ........  DDM
Dodecyl/Octadecyl methacrylate mixture...       14  ........  DOM                DDM.
Dodecyl/Pentadecyl methacrylate mixture..       14  ........  DDP
Dodecyl phenol...........................       21  ........  DOL
Dodecyl xylene...........................       32  ........  DXY
Drilling brines (containing Calcium,            43  ........  DRL                DRB/DRS.
 Potassium or Sodium salts).
Drilling brines (containing Zinc salts)..       43  ........  DZB                DRB.
Drilling brines, including: Calcium             43         3  .................  DRS/DRL
 bromide solution, Calcium chloride
 solution and Sodium chloride solution.
Drilling mud (low toxicity) (if flammable       33  ........  DRO                DRM/DRN/DRP.
 or combustible).
Drilling mud (low toxicity) (if non-            43  ........  DRP                DRM/DRN/DRO.
 flammable or non-combustible).
Epichlorohydrin..........................       17  ........  EPC
Epoxy resin..............................       16  ........  EPN
ETBE, see Ethyl tert-butyl ether.........  .......  ........  .................  EBE
Ethane...................................       31  ........  ETH
Ethanolamine.............................        8  ........  MEA
2-Ethoxyethanol, see Ethylene glycol       .......  ........  EEO                EGC (EGE)
 monoalkyl ethers.
2-Ethoxyethyl acetate....................       34         2  EEA                EGA.
Ethoxylated alkyloxy alkyl amine.........        8  ........  ELM
Ethoxylated alcohols, C11-C15, see         .......  ........  .................  AEA/AEB/AED/AET/APV/APW/APX
 alcohol polyethoxylates.
Ethoxylated long-chain (C16+)                    8  ........  ELA
 alkyloxyalkylamine.
Ethoxylated tallow alkyl amine...........        7  ........  TAY                TAG/TAR
Ethoxylated tallow alkyl amine, glycol           7  ........  TAG                TAR/TAY
 mixture.
Ethoxylated tallow amine (            7         3  TAR                TAG/TAY
 95%).
Ethoxy triglycol, see Poly(2-8)alkylene    .......  ........  ETG                PAG (ETR/TGE)
 glycol monoalkyl (C1-C6) ether.
Ethoxy triglycol (crude).................       40  ........  ETR
Ethyl acetate............................       34         2  ETA
Ethyl acetoacetate.......................       34  ........  EAA
Ethyl acrylate...........................       14         2  EAC
Ethyl alcohol............................       20         2  EAL
Ethylamine...............................        7         2  EAM                EAN/EAO.
Ethylamine solution (72% or less)........        7         3  EAN                EAM/EAO
Ethyl amyl ketone........................       18  ........  EAK                ELK.
Ethylbenzene.............................       32  ........  ETB
Ethyl butanol............................       20  ........  EBT
N-Ethylbutylamine........................        7  ........  EBA
Ethyl tert-butyl ether...................       41         2  EBE
Ethyl butyrate...........................       34  ........  EBR
Ethyl chloride...........................       36  ........  ECL
Ethyl cyclohexane........................       31  ........  ECY
N-Ethylcyclohexylamine...................        7  ........  ECC
2-Ethyl-2-(2,4-dichlorophenoxy) acetate..       34  ........  EDY
2-Ethyl-2-(2,4-dichlorophenoxy)                 34  ........  EDP
 propionate.
S-Ethyl dipropylthiocarbamate............       34         3  ECB
Ethylene.................................       30  ........  ETL
Ethyleneamine EA 1302....................        7         2  EMX
Ethylene carbonate.......................       34  ........  ECR
Ethylene chlorohydrin....................       20  ........  ECH
Ethylene cyanohydrin.....................       20         2  ETC
Ethylenediamine..........................        7         2  EDA                EMX.
Ethylenediaminetetraacetic acid/                43  ........  EDS
 tetrasodium salt solution.
Ethylene dibromide.......................       36  ........  EDB

[[Page 104]]

 
Ethylene dichloride......................       36         2  EDC
Ethylene glycol..........................       20         2  EGL                EAG.
Ethylene glycol acetate..................       34  ........  EGO
Ethylene glycol butyl ether, see Ethylene  .......  ........  EGM                EGC
 glycol monoalkyl ethers.
Ethylene glycol tert-butyl ether, see      .......  ........  EGG                EGC
 Ethylene glycol monoalkyl ethers.
Ethylene glycol butyl ether acetate......       34  ........  EMA
Ethylene glycol diacetate................       34  ........  EGY
Ethylene glycol dibutyl ether............       40  ........  EGB
Ethylene glycol ethyl ether, see Ethyl     .......  ........  EGE                EGC/EEO
 glycol monoalkyl ethers.
Ethylene glycol ethyl ether acetate, see   .......  ........  EGA                EEA
 2-Ethoxyethyl acetate.
Ethylene glycol hexyl ether, see Ethylene  .......  ........  EGH                EGC
 glycol monoalkyl ethers.
Ethylene glycol isobutyl ether, see        .......  ........  .................  EGC (EGG/EGM)
 Ethylene glycol monoalkyl ethers.
Ethylene glycol isopropyl ether, see       .......  ........  EGI                EGC
 Ethylene glycol monoalkyl ethers.
Ethylene glycol methyl butyl ether, see    .......  ........  EMB                EGC
 Ethylene glycol monoalkyl ethers.
Ethylene glycol methyl ether, see          .......  ........  EME                EGC
 Ethylene glycol monoalkyl ethers.
Ethylene glycol methyl ether acetate.....       34  ........  EGT
Ethylene glycol monoalkyl ethers.........       40         2  EGC
Including:
    Ethylene glycol butyl ether..........       40
    Ethylene glycol tert-butyl ether.....       40
    Ethylene glycol ethyl ether..........       40
    Ethylene glycol hexyl ether..........       40
    Ethylene glycol isobutyl ether.......       40
    Ethylene glycol isopropyl ether......       40
    Ethylene glycol methyl ether.........       40
    Ethylene glycol methyl butyl ether...       40
    Ethylene glycol propyl ether.........       40
Ethylene glycol phenyl ether.............       40  ........  EPE
Ethylene glycol phenyl ether/Diethylene         40  ........  EDX
 glycol phenyl ether mixture.
Ethylene glycol propyl ether, see          .......  ........  EGP                EGC/EGI/EGN
 Ethylene glycol monoalkyl ethers.
Ethylene glycol n-propyl ether, see        .......  ........  EGN                EGC (EGI/EGP)
 Ethylene glycol monoalkyl ethers.
Ethylene oxide...........................        0         1  EOX
Ethylene oxide/Propylene oxide mixture...       16  ........  EPF                EPM.
Ethylene oxide/Propylene oxide mixture          16         3  EPM                EPF
 with an Ethylene oxide content not more
 than 30% by mass.
Ethylene-Propylene copolymer (in liquid         31  ........  EPY
 mixtures).
Ethylene-Vinyl acetate copolymer                43  ........  ECV
 (emulsion).
Ethyl ether, see Diethyl ether...........  .......  ........  .................  EET
Ethyl-3-ethoxypropionate.................       34  ........  EEP
2-Ethylhexaldehyde, see Octyl aldehydes..  .......  ........  EHA                OAL (OLX)
2-Ethylhexanoic acid, see Octanoic acid    .......  ........  EHO                OAY (OAA)
 (all isomers).
2-Ethylhexanol, see Octanol..............  .......  ........  EHX                OCA (OTA)
2-Ethylhexyl acrylate....................       14  ........  EAI
2-Ethylhexylamine........................        7  ........  EHM
Ethyl hexyl phthalate....................       34  ........  EHE
Ethyl hexyl tallate......................       34  ........  EHT
2-Ethyl-2-(hydroxymethyl) propane-1,3-          34  ........  EHD
 diol (C8-C10) ester.
Ethyl lactate............................       34  ........  ELT
Ethylidene norbornene....................       30         2  ENB
Ethyl methacrylate.......................       14  ........  ETM
N-Ethylmethylallylamine..................        7  ........  EML
Ethyl propionate.........................       34  ........  EPR
2-Ethyl-3-propylacrolein.................       19         2  EPA
2-Ethyl-6-methyl-N-(1[min]-methyl-2-             9  ........  EEM.
 methoxyethyl)aniline.
o-Ethyl phenol...........................       21  ........  EPL
Ethyl toluene............................       32  ........  ETE
Fatty acid methyl esters.................       34         3  FME
Fatty acids (C8-C10).....................       34         3  FDS
Fatty acids (C12+).......................       34         3  FDT                FAB/FAD/FAI/FDI
Fatty acids (saturated, C13+)............       34  ........  FAB                FAD
Fatty acids (saturated, C14+), see Fatty   .......  ........  FAD                FAB
 acids (saturated, C13+).
Fatty acids (C16+).......................       34         3  FDI
Fatty acids, essentially linear (C6-C18)        34      2, 3  FAE
 2-ethylhexyl ester.
Ferric chloride solution.................        1  ........  FCS                FCL.
Ferric                                          43         2  FHX                STA.
 hydroxyethylethylenediaminetriacetic
 acid, trisodium salt solution.
Ferric nitrate/Nitric acid solution......        3         2  FNN
Fish oil, see Oil, edible: Fish..........  .......         2  .................  OFS (AFN)
Fish solubles (water based fish meal            43  ........  FSO
 extracts).
Fluorosilicic acid (20-30%) in water             1         3  FSK                FSJ/FSL/HFS
 solution.
Fluorosilicic acid (30% or less).........        1  ........  FSJ                FSK/FSL/HFS.
Formaldehyde (50% or more), Methanol            19         2  MTM
 mixtures.
Formaldehyde solutions (37%-50%).........       19         2  FMS                FMG/FMR.
Formaldehyde solutions (45% or less).....       19      2, 3  FMR                FMG/FMS

[[Page 105]]

 
Formamide................................       10  ........  FAM
Formic acid..............................        4         2  FMA                FMB.
Formic acid (85% or less)................        4         2  FMB                FMA
Formic acid (over 85%)...................        4      2, 3  FMD
Formic acid mixture (containing up to 18%        4      2, 3  FMC                FMA/FMB
 Propionic acid and up to 25% Sodium
 formate).
Fructose solution........................       43  ........  FTS                FRT.
Fumaric adduct of Rosin, water dispersion       43  ........  FAR
Fuming sulfuric (alternately sulphuric)
 acid, see.
Furfural.................................       19  ........  FFA
Furfuryl alcohol.........................       20         2  FAL
Gas oil, cracked, see Oil, misc.: Gas,...
Gasoline blending stock, alkylates.......       33  ........  GAK
Gasoline blending stock, reformates......       33  ........  GRF
Gasolines:
    Automotive (containing not more than        33  ........  GAT
     4.23 grams lead per gal.).
    Aviation (containing not more than          33  ........  GAV                AVA
     4.86 grams lead per gal.).
    Casinghead (natural).................       33  ........  GCS
    Polymer..............................       33  ........  GPL
    Straight run.........................       33  ........  GSR
Gasolines: Pyrolysis (containing           .......  ........  GPY                PYG
 Benzene), see Pyrolysis gasoline
 (containing Benzene).
Glucitol/Glycerol blend propoxylated            40         3  GGA
 (containing less than 10% amines).
Glucose solution.........................       43  ........  GLS                DTS.
Glutaraldehyde solutions (50% or less)...       19  ........  GTA
Glycerine................................       20         2  GCR
Glycerine (83%)/Dioxanedimethanol (17%)         20  ........  GDN                GDM.
 mixture.
Glycerol, see Glycerine..................  .......         2  .................  GCR
Glycerol ethoxylated.....................       40  ........  GXA
Glycerol monooleate......................       20  ........  GMO
Glycerol polyalkoxylate..................       40  ........  GPA
Glycerol propoxylated....................       40         3  GXP
Glycerol, propoxylated and ethoxylated...       40         3  GXE
Glycerol/Sucrose blend propoxylated and         40         3  GSB
 ethoxylated.
Glyceryl triacetate......................       34  ........  GCT
Glycidyl ester of C10 trialkyl acetic           34  ........  GLU                GLT
 acid.
Glycidyl ester of tertiary carboxylic      .......  ........  GLT                GLU
 acid, see Glycidyl ester of C10 trialkyl
 acetic acid.
Glycidyl ester of tridecyl acetic acid,    .......  ........  GLT                GLU
 see Glycidyl ester of C10 trialkyl
 acetic acid.
Glycidyl ester of Versatic acid, see       .......  ........  GLT                GLU
 Glycidyl ester of C10 trialkyl acetic
 acid.
Glycine, sodium salt solution............        7  ........  GSS
Glycol diacetate, see Ethylene glycol      .......  ........  .................  EGY
 diacetate.
Glycol mixture, crude....................       20  ........  GMC
Glycol triacetate, see Glyceryl            .......  ........  .................  GCT
 triacetate.
Glycolic acid solution (70% or less).....        4         3  GLC
Glyoxal solution (40% or less)...........       19         3  GOS
Glyoxylic acid solution (50% or less)....        4         3  GAC
Glyphosate solution (not containing              7  ........  GIO                RUP.
 surfactant).
Grape Seed Oil, see Oil, edible: Grape     .......  ........  .................  ...............................
 seed.
Groundnut oil, see Oil, edible: Groundnut  .......  ........  .................  OGN
Hazelnut oil, see Oil, edible: Hazelnut..  .......  ........  .................  OHN (VEO)
Heptadecane (all isomers), see n-Alkanes   .......  ........  .................  ALV (ALJ)
 (C10+) (all isomers).
Heptane (all isomers), see Alkanes (C6-    .......  ........  HMX                ALK(HPI/HPT)
 C9).
n-Heptanoic acid.........................        4  ........  HEN                HEP.
Heptanol (all isomers)...................       20         3  HTX                HTN
Heptene (all isomers)....................       30      2, 3  HPX                THE
Heptyl acetate...........................       34  ........  HPE
Heptylbenzenes, see Alkyl (C5-C8)          .......  ........  .................  AKD
 benzenes.
Herbicide (C15-H22-NO2-Cl), see            .......  ........  .................  MCO
 Metolachlor.
Hexadecanol (Cetyl alcohol), see Alcohols  .......  ........  .................  ALY (ASY/AYL)
 (C13+).
1-Hexadecylnaphthalene/1,4-                     32  ........  HNH                HNI.
 bis(Hexadecyl)naphthalene mixture.
1-n-Hexadecylnaphthalene (90%)/1,4-di-n-        32  ........  HNI                HNH.
 (Hexadecyl)naphthalene (10%).
Hexaethylene glycol, see Polyethylene      .......  ........  HMG                PEG
 glycol.
Hexamethylene diisocyanate...............       12  ........  HMS                HDI
Hexamethylene glycol.....................       20  ........  HMG                HXG
Hexamethylenediamine (molten)............        7         3  HME                HMD/HMC
Hexamethylenediamine adipate (50% in            43  ........  HAM                HAN
 water).
Hexamethylenediamine adipate solution....       43  ........  HAN                HAM
Hexamethylenediamine solution............        7  ........  HMC                HMD/HME
Hexamethyleneimine.......................        7  ........  HMI
Hexamethylenetetramine solutions.........        7  ........  HTS                HMT

[[Page 106]]

 
Hexane (all isomers), see Alkanes (C6-C9)  .......         2  HXS                ALK (IHA/HXA)
1,6-Hexanediol, distillation overheads...        4      2, 3  HDO
Hexanoic acid............................        4  ........  HXO
Hexanol..................................       20  ........  HXM                HEW/HEZ/HXN.
Hexene (all isomers).....................       30      2, 3  HEX                HXE/HXT/HXU/HXV/MPN/MTN
Hexyl acetate............................       34  ........  HAE
Hexylbenzenes, see Alkyl (C5-C8) benzenes  .......  ........  .................  AKD
Hexylene glycol, see Hexamethylene glycol  .......  ........  HXG                HMG
Hog grease, see Lard.....................  .......  ........  .................  LRD
Hydrochloric acid........................        1  ........  HCL
Hydrofluorosilicic acid (25% or less),     .......  ........  .................  FSJ(FSK/FSL/HFS)
 see Fluorosilicic acid (30% or less).
bis(Hydrogenated tallow alkyl)methyl             7  ........  HTA
 amines.
Hydrogen peroxide solutions (over 8% but         0      1, 3  HPN                HPO/HPS
 not more than 60% by mass).
Hydrogen peroxide solutions (over 60% but        0      1, 3  HPS                HPN/HPO
 not more than 70% by mass).
Hydrogenated starch hydrolysate..........        0      1, 3  HSH
2-Hydroxyethyl acrylate..................       14         2  HAI
N-(Hydroxyethyl)ethylenediamine triacetic       43  ........  HET
 acid, trisodium salt solution.
N,N-bis(2-Hydroxyethyl) oleamide.........       10  ........  HOO
2-Hydroxy-4-(methylthio)butanoic acid....        4  ........  HBA
Hydroxyl terminated polybutadiene, see     .......  ........  .................  PHT
 Polybutadiene, hydroxyl terminated.
alpha-Hydro-omega-                              40  ........  HTO                PYS/PYT
 hydroxytetradeca(oxytetramethylene).
Illipe oil, see Oil, edible: Illipe......  .......  ........  .................  ILO (VEO)
Isoamyl alcohol..........................       20         3  IAA                AAI/AAL/AAN/APM/ASE
Isobutyl alcohol.........................       20      2, 3  IAL                BAN/BAS/BAT/BAY
Isobutyl formate.........................       34         3  BFI                BFN/BFO
Isobutyl methacrylate....................       14         3  BMI                BMH/BMN
Isodecaldehyde...........................       19
Isononylaldehyde (crude).................       19  ........  INC
Isophorone...............................       18         2  IPH
Isophoronediamine........................        7  ........  IPI
Isophorone diisocyanate..................       12  ........  IPD
Isoprene (all isomers)...................       30  ........  IPR
Isoprene (part refined)..................       30  ........  IPS                IPR/ISC.
Isoprene concentrate (Shell).............       30  ........  ISC
Isopropanolamine.........................        8         3  MPA                IPF/PAX/PLA
Isopropanolamine solution................        8         3  PAI                MPA/PAY/PLA/PRG
Isopropyl acetate........................       34         3  IAC                PAT
Isopropyl alcohol........................       20      2, 3  IPA                IPB/PAL
Isopropylamine...........................        7         3  IPP                IPO/IPQ/PRA
Isopropylamine (70% or less) solution....        7         3  IPQ                IPO/IPP/PRA
Isopropylbenzene, see Alkyl (C3-C4)        .......  ........  .................  AKC(CUM/PBY/PBZ)
 benzenes.
Isopropylcyclohexane.....................       31         3  IPX
Isopropyl ether..........................       41         3  IPE                PRL/PRN
Jatropha oil, see Oil, misc.: Jatropha...  .......         3  .................  JTO
Jet fuels:                                 .......  ........  JPO                JPT/JPF/JPV
    JP-4.................................       33  ........  JPF
    JP-5.................................       33  ........  JPV
    JP-8.................................       33  ........  JPE
Kaolin clay solution.....................       43  ........  KLC                KLS.
Kaolin slurry............................       43  ........  KLS                KLC.
Kerosene.................................       33  ........  KRS
Ketone residue...........................       18  ........  KTR
Kraft black liquor.......................        5  ........  KBL                KPL.
Kraft pulping liquors (free alkali               5  ........  KPL                KBL
 content 3% or more) (Black, Green, or
 White).
Lactic acid..............................        0      1, 2  LTA
Lactonitrile solution (80% or less)......       37         3  LNI
Lard.....................................       34  ........  LRD                OLD.
Latex, ammonia (1% or less)-inhibited....       30         3  LTX
Latex: Carboxylated Styrene-Butadiene           43         3  LCC                LCB/LSB
 copolymer; Styrene-Butadiene rubber.
Latex, liquid synthetic..................       43  ........  LLS                LCB/LCC/LSB.
Lauric acid..............................       34  ........  LRA
Lauric acid methyl ester/Myristic acid          34  ........  LMM
 methyl ester mixture.
Lauryl polyglucose, see Alkyl (C12-C14)    .......  ........  .................  AGM/LAP
 polyglucoside solution (55% or less).
Lauryl polyglucose (50% or less), see      .......  ........  LAP                AMG
 Alkyl (C12-C14) polyglucoside solution
 (55% or less).
Lecithin.................................       34  ........  LEC

[[Page 107]]

 
Lignin liquor............................       43  ........  LNL                ALG/CLL/LGA/LGM/LSL/SHC/SHP/SHQ/
                                                                                  SLP.
Ligninsulfonic (alternately                     43         3  LGM                LGA/LNL/LSL
 Ligninsulphonic) acid, magnesium salt
 solution.
Ligninsulfonic (alternately                .......  ........  LGA                LNL or SLG
 Ligninsulphonic) acid, sodium salt
 solution, see Lignin liquor or Sodium
 lignosulfonate (alternately
 lignosulphonate) solution.
d-Limonene, see Dipentene................  .......  ........  .................  DPN
Linear alkyl (C12-C16) propoxyamine              8  ........  LPE
 ethoxylate.
Linseed oil, see Oil, misc.: Linseed.....  .......  ........  .................  OLS
Liquefied Natural Gas, see Methane.......  .......  ........  LNG                MTH
Liquid chemical wastes...................        0      1, 3  LCW
Liquid Streptomyces solubles.............       43
Long-chain alkaryl polyether (C11-C20)...       41  ........  LCP
Long-chain alkaryl sulfonic (alternately         0         1  LCS
 sulphonic) acid (C16-C60).
Long-chain alkyl amine...................        7  ........  LAA
Long-chain alkylphenate/Phenol sulfide          21  ........  LPS
 (alternately sulphide) mixture.
Long-chain alkyl (C13+) salicylic acid...        4  ........  LAS
Long-chain polyetheramine in alkyl (C2-          7  ........  LCE
 C4)benzenes.
L-Lysine solution (60% or less)..........       43         3  LYS
Magnesium chloride solution..............        0      1, 2  MGL
Magnesium hydroxide slurry...............        5  ........  MHS
Magnesium long-chain alkaryl sulfonate          34  ........  MAS                MSE
 (alternately sulphonate) (C11-C50).
Magnesium long-chain alkyl phenate              34  ........  MPS
 sulfide (alternately sulphide) (C8-C20).
Magnesium long-chain alkyl salicylate           34  ........  MLS
 (C11+).
Magnesium nitrate solution (66.7%).......       43  ........  MGP                MGN/MGO.
Magnesium nonyl phenol sulfide             .......  ........  .................  MPS
 (alternately sulphide), see Magnesium
 long-chain alkyl phenate sulfide
 (alternately sulphide) (C8-C20).
Magnesium sulfonate (alternately           .......  ........  MSE                MAS
 sulphonate), see Magnesium long-chain
 alkaryl sulfonate (alternately
 sulphonate) (C11-C50).
Maleic anhydride.........................       11  ........  MLA
Maleic anhydride/sodium allylsulphonate         11  ........  .................  PHN (CFO/CRL/CRO/CRS/CSO)
 copolymer solution.
Maltitol solution........................        0      1, 3  MTI
Mango kernel oil, see Oil, edible: Mango   .......  ........  .................  MKO (VEO)
 kernel.
Mercaptobenzothiazol, sodium salt                5  ........  SMB                MBT
 solution.
2-Mercaptobenzothiazol (in liquid                5  ........  BTM                SMD
 mixture).
Mesityl oxide............................       18         2  MSO
Metam sodium solution....................        7  ........  MSS                SMD.
Methacrylic acid.........................        4  ........  MAD
Methacrylic acid--Alkoxypoly(alkylene           20         3  MAQ
 oxide) methacrylate copolymer, sodium
 salt aqueous solution (45% or less).
Methacrylic resin in ethylene dichloride.       14  ........  MRD
Methacrylonitrile........................       15         2  MET
Methane..................................       31  ........  MTH                LNG.
3-Methoxy-1-butanol......................       20  ........  MTX
3-Methoxybutyl acetate...................       34  ........  MOA
N-(2-Methoxy-1-methyl ethyl)-2-ethyl-6-         34  ........  .................  MCO.
 methyl chloroacetanilide, see
 Metolachlor.
1-Methoxy-2-propyl acetate...............       34  ........  MXP
Methoxy triglycol, see Poly(2-8)alkylene   .......  ........  MTG                PAG (TGY)
 glycol monoalkyl (C1-C6) ether.
Methyl acetate...........................       34  ........  MTT
Methyl acetoacetate......................       34  ........  MAE
Methyl acetylene/Propadiene mixture......       30  ........  MAP
Methyl acrylate..........................       14  ........  MAM
Methyl alcohol...........................       20         2  MAL
Methylamine solutions (42% or less)......        7         3  MSZ
Methyl amyl acetate......................       34  ........  MAC
Methyl amyl alcohol......................       20  ........  MAA                MIC
Methyl amyl ketone.......................       18  ........  MAK
N-Methylaniline..........................        9         3  MAN
alpha-Methylbenzyl alcohol with                 20         3  MBA
 Acetophenone (15% or less).
Methyl bromide...........................       36  ........  MTB
Methyl butanol, see the Amyl alcohols....  .......  ........  .................  AAI/AAL/AAN/APM/ASE/IAA
Methyl butenes, see Pentene (all isomers)  .......  ........  .................  PTX (AMW/AMZ/PTE)
Methyl butenol...........................       20  ........  MBL
Methyl tert-butyl ether..................       41         2  MBE
Methyl butyl ketone......................       18         2  MBB                MBK/MIK.
Methyl 3-(3,5 di-tert-butyl-4-                  20  ........  MYP
 hydroxyphenyl) propionate crude melt.
Methylbutynol............................       20  ........  MBY                MHB.

[[Page 108]]

 
3-Methyl butyraldehyde...................       19  ........  MBR
Methyl butyrate..........................       34  ........  MBU
Methyl chloride..........................       36  ........  MTC
Methylcyclohexane........................       31  ........  MCY
Methylcyclohexanemethanol (crude)........       20  ........  MYH
Methylcyclopentadiene dimer..............       30  ........  MCK
Methylcyclopentadienyl manganese                 0      1, 3  MCT                MCW
 tricarbonyl.
Methylcyclopentadienyl manganese                 0         1  MCW                MCT.
 tricarbonyl (60-70%) in mineral oil.
Methyl diethanolamine....................        8  ........  MDE                MAB
Methyl ethyl ketone......................       18         2  MEK
2-Methyl-6-ethyl aniline.................        9  ........  MEN
Methyl formate...........................       34  ........  MFM
N-Methylglucamine solution (70% or less).       43         3  MGC
2-Methylglutaronitrile...................       37  ........  MLN                MGN
2-Methylglutaronitrile with 2-                  37         3  MGE                MLN
 Ethylsuccinonitrile (12% or less).
Methyl heptyl ketone.....................       18  ........  MHK
2-Methyl-2-hydroxy-3-butyne..............       20  ........  MHB                MBY
Methyl isoamyl ketone, see Methyl amyl     .......  ........  MAJ                MAK
 ketone.
Methyl isobutyl carbinol, see Methyl amyl  .......  ........  MIC                MAA
 alcohol.
Methyl isobutyl ketone...................       18  ........  MIK                MBB/MBK
Methyl methacrylate......................       14  ........  MMM
Methylene bridged isobutylenated phenols.       21  ........  MBP
Methylene chloride, see Dichloromethane..  .......  ........  .................  DCM
3-Methyl-3-methoxybutanol................       20  ........  MXB
2-Methyl-5-ethyl pyridine................        9  ........  MEP
3-Methyl-3-methoxybutyl acetate..........       34  ........  MMB
Methyl naphthalene (molten)..............       32         3  MNA
Methylolurea.............................       19  ........  MUS
2-Methyl pentane, see Hexane (all          .......  ........  .................  HXS (ALK/HXA/IHA/NHX)
 isomers).
2-Methyl-1,5-pentanediamine..............        7  ........  MPM
2-Methyl-1-pentene, see Hexene (all        .......  ........  MPN                HEX (HXE/HXT/HXU/HXV/MTN)
 isomers).
4-Methyl-1-pentene, see Hexene (all        .......  ........  MTN                HEX (HXE/HXT/HXU/HXV/MPN)
 isomers).
Methyl tert-pentyl ether, see tert-Amyl    .......  ........  .................  AYE
 methyl ether.
2-Methyl-1,3-propanediol.................       20  ........  MDL
Methyl propyl ketone.....................       18  ........  MKE
2-Methyl-5-ethylpyridine.................        9  ........  MEP
Methylpyridine, see the Methylpyridines..  .......  ........  MPQ                MPE/MPF/MPR
2-Methylpyridine.........................        9         3  MPR                MPE/MPF/MPQ
3-Methylpyridine.........................        9         3  MPE                MPF/MPQ/MPR
4-Methylpyridine.........................        9         3  MPF                MPE/MPQ/MPR
N-Methyl-2-pyrrolidone...................        9         2  MPY
Methyl salicylate........................       34  ........  MES
alpha-Methylstyrene......................       30  ........  MSR
3-(Methylthio)propionaldehyde............       19  ........  MTP
Metolachlor..............................       34  ........  MCO
Microsilica slurry.......................       43  ........  MOS
Milk.....................................       43  ........  MLK
Mineral spirits..........................       33  ........  MNS
Mixed C4 Cargoes.........................       30  ........  MIX
Molasses.................................       20  ........  MOL                MON.
Molasses residue (from fermentation).....        0         1  MON                MOL.
Molybdenum polysulfide (alternately              0      1, 3  MOP
 polysulphide) long-chain alkyl
 dithiocarbamide complex.
Monochlorodifluoromethane................       36  ........  MCF
Monoethylamine, see Ethylamine...........  .......  ........  .................  EAM (EAN/EAO)
Monoisopropanolamine, see                  .......  ........  .................  MPA (PLA/PLX)
 Isopropanolamine.
Monoethylamine, see Ethylamine...........  .......  ........  .................  EAM (EAN/EAO)
Morpholine...............................        7         2  MPL
Motor fuel anti-knock compound                   0         1  MFA
 (containing lead alkyls).
MTBE, see Methyl tert-butyl ether........  .......  ........  .................  MBE
Myrcene..................................       30  ........  MRE
Naphtha:
    Aromatic.............................       33  ........  NAR
    Coal tar solvent.....................       33  ........  NCT
    Heavy................................       33  ........  NAG
    Paraffinic...........................       33  ........  NPF
    Petroleum............................       33  ........  PTN
    Solvent..............................       33  ........  NSV
    Stoddard solvent.....................       33  ........  NSS
    Varnish Makers' and Painters'........       33  ........  NVM

[[Page 109]]

 
Naphthalene (molten).....................       32         3  NTM
Naphthalene still residue................       32         2  NSR
Naphthalene sulfonic (alternately               34  ........  NSB                NSA
 sulphonic) acid, sodium salt solution.
Naphthalene sulfonic (alternately                0         1  NFS
 sulphonic) acid-Formaldehyde copolymer,
 sodium salt solution.
Naphthenic acid..........................        4  ........  NTI
Naphthenic acid, sodium salt solution....       43  ........  NTS
Neodecanoic acid.........................        4  ........  NEA                DCO/NAT.
Nitrating acid (mixture of Sulfuric              0         1  NIA
 (alternately Sulphuric) and Nitric
 acids).
Nitric acid (70% and over)...............        3      2, 3  NCE                NAC/NCD
Nitric acid (less than 70%)..............        3         2  NCD                NAC/NCE.
Nitric Acid, fuming, see Nitric acid (70%  .......   1, 2, 3  .................  NCE
 and over).
Nitric Acid, red fuming, see Nitric acid   .......   1, 2, 3  .................  NCE
 (70% and over).
Nitrilotriacetic acid, trisodium salt           34         3  NCA
 solution.
Nitrobenzene.............................       42  ........  NTB
o-Nitrochlorobenzene, see o-               .......  ........  .................  CNO (CNP)
 Chloronitrobenzene.
Nitroethane..............................       42  ........  NTE
Nitroethane (80%)/Nitropropane (20%).....       42      2, 3  NNL                NNM/NNO/NPM/NPN/NPP/NTE
Nitroethane/1-Nitropropane (each 15% or         42         2  NNO                NNL/NNM/NPM/NPN/NPP/NTE.
 more) mixture.
Nitrogen.................................        0         1  NXX
Nitrophenol (mixed isomers)..............       42  ........  NPX                NIP/NPH
o-Nitrophenol (molten)...................        0      1, 2  NTP                NIP/NPH/NPX
Nitropropane (60%)/Nitroethane (40%)            42  ........  NNM                NNL/NNO/NPM/NPN/NPP/NTE
 mixture.
1-or 2-Nitropropane......................       42  ........  NPM                NPN/NPP
o- or p-Nitrotoluenes....................       42         3  NIT                NIE/NTR/NTT
Nonane (all isomers), see Alkanes (C6-C9)  .......  ........  NAX                ALK (NAN)
Nonanoic acid (all isomers)..............        4  ........  NNA                NAI/NIN.
Nonanoic/Tridecanoic acid mixture........        4  ........  NAT                NAI/NIN/NNA.
Non-edible industrial grade palm oil, see  .......  ........  .................  OPB
 Oil, misc.: Palm, non-edible industrial
 grade.
Nonene (all isomers).....................       30         2  NOO                NNE/NON/OAM/OFX/OFY
Nonyl acetate............................       34  ........  NAE
Nonyl alcohol (all isomers)..............       20         2  NNS                ALR/DBC/NNI/NNN
Nonylbenzene, see Alkyl (C9+) benzenes...  .......  ........  .................  AKB
Non-noxious Liquid Substance, (12) n.o.s.        0         1  NOL
 Cat OS.
Nonyl methacrylate monomer...............       14  ........  NMA
Nonyl phenol.............................       21  ........  NNP
Nonyl phenol poly(4+)ethoxylate, see       .......  ........  NPE                APN
 Alkyl (C7-C11) phenol poly(4-12)
 ethoxylate.
Nonyl phenol sulfide (alternately          .......  ........  .................  AKS (NPS)
 sulphide) (90% or less) solution, see
 Alkyl (C8-C40) phenol sulfide
 (alternately sulphide).
Nonylphenol (48-62%)/Phenol (42-48%)/           21  ........  NYL
 Dinonylphenol (1-10%) mixture.
Noxious Liquid Substance, NF, (1) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat X.
Noxious Liquid Substance, F, (2) n.o.s.          0         1
 (``trade name'' contains ``principal
 components'') Cat X.
Noxious Liquid Substance, NF, (3) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat X.
Noxious Liquid Substance, F, (4) n.o.s.          0         1
 (``trade name'' contains ``principal
 components'') Cat X.
Noxious Liquid Substance, NF, (5) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat Y.
Noxious Liquid Substance, F, (6) n.o.s.          0         1
 (``trade name'' contains ``principal
 components'') Cat Y.
Noxious Liquid Substance, NF, (7) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat Y.
Noxious Liquid Substance, F, (8) n.o.s.          0         1
 (``trade name'' contains ``principal
 components'') Cat Y.
Noxious Liquid Substance, NF, (9) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat Z.
Noxious Liquid Substance, F, (10) n.o.s.         0         1
 (``trade name'' contains ``principal
 components'') Cat Z.
Noxious Liquid Substance, (11) n.o.s.            0         1
 (``trade name'' contains ``principal
 components'') Cat Z.
Non-noxious Liquid Substance, (12) n.o.s.        0         1  NOL
 (``trade name'' contains ``principal
 components'') Cat OS.
Nutmeg butter oil, see Oil, edible:        .......  ........  .................  ONB (VEO)
 Nutmeg butter.
1-Octadecene, see the olefin or alpha-     .......  ........  .................  OAM/OFZ
 olefin entries.
1-Octadecanol, see Stearyl alcohol.......  .......  ........  .................  SYL (ALY/ASY)

[[Page 110]]

 
Octadecenoamide solution.................       10  ........  ODD
Octadecenol (oleyl alcohol), see Alcohols  .......  ........  .................  ALY (AYL/ASY/OYL)
 (C13+).
Octamethylcyclotetrasiloxane.............       34         3  OSA
Octane (all isomers), see Alkanes (C6-C9)  .......  ........  OAX                ALK (IOO/OAN)
Octanoic acid (all isomers)..............        4  ........  OAY                OAA/EHO
Octanol (all isomers)....................       20         2  OCX                EHX/OPA/OTA.
Octene (all isomers).....................       30         2  OTX                OAM/OFC/OFY/OFW/OTE.
n-Octyl acetate..........................       34  ........  OAF                OAE.
Octyl alcohol, see Octanol (all isomers).  .......         2  .................  OCX (EHX/IOA/OTA)
Octyl aldehydes..........................       19  ........  OAL                EHA/IOC//OLX.
Octylbenzenes, see Alkyl (C5-C8) benzenes  .......  ........  .................  AKD
Octyl decyl adipate......................       34  ........  ODA
n-Octyl mercaptan........................        0  ........  OME
Octyl nitrates (all isomers), see Alkyl    .......         2  ONE                AKN
 (C7-C9) nitrates.
Octyl phenol.............................       21  ........  OPH
Octyl phthalate, see Dioctyl phthalate...  .......  ........  .................  DAH (DIE/DIO/DLK/DOP)
Oil, edible:
    Beechnut.............................       34  ........  OBN                VEO
    Castor...............................       34  ........  OCA                VEO
    Cocoa butter.........................       34  ........  OCB                VEO
    Coconut..............................       34  ........  OCC                VEO
    Cod liver............................       34  ........  OCL                AFN
    Corn.................................       34  ........  OCO                VEO
    Cotton seed..........................       34  ........  OCS                VEO
    Fish.................................       34         2  OFS                AFN
    Grape seed...........................       34
    Groundnut............................       34  ........  OGN                VEO
    Hazelnut.............................       34  ........  OHN                VEO
    Illipe...............................       34  ........  ILO                VEO
    Lard.................................       34  ........  OLD                AFN
    Maize, see Oil, edible: Corn.........  .......  ........  .................  OCO (VEO)
    Mango kernel.........................       34         3  MKO
    Nutmeg butter........................       34  ........  ONB                VEO
    Olive................................       34  ........  OOL                VEO
    Palm.................................       34      2, 3  OPM                VEO
    Palm kernel..........................       34  ........  OPO                VEO
    Palm kernel olein....................       34  ........  PKO                VEO
    Palm kernel stearin..................       34  ........  PKS                VEO
    Palm mid fraction....................       34  ........  PFM                VEO
    Palm olein...........................       34  ........  PON                VEO
    Palm stearin.........................       34  ........  PMS                VEO
    Peanut...............................       34  ........  OPN                VEO
    Poppy................................       34  ........  OPY                VEO
    Poppy seed...........................       34  ........  OPS                VEO
    Raisin seed..........................       34  ........  ORA                VEO
    Rapeseed.............................       34  ........  ORP                VEO
    Rapeseed (low erucic acid containing        34         3  ORO                ORP/VEO
     less than 4% free fatty acids).
    Rice bran............................       34  ........  ORB                VEO
    Safflower............................       34  ........  OSF                VEO
    Salad................................       34  ........  OSL                VEO
    Sesame...............................       34  ........  OSS                VEO
    Shea butter..........................       34  ........  OSH                VEO
    Soyabean.............................       34         2  OSB                VEO
    Sunflower, see Oil, edible: Sunflower  .......  ........  .................  OSN (VEO)
     seed.
    Sunflower seed.......................       34  ........  OSN                VEO
    Tucum................................       34  ........  OTC                VEO
    Vegetable............................       34  ........  OVG                VEO
    Walnut...............................       34  ........  OWN                VEO
Oil, fuel:
    No. 1................................       33  ........  OON
    No. 1-D..............................       33  ........  OOD
    No. 2................................       33  ........  OTW
    No. 2-D..............................       33  ........  OTD
    No. 4................................       33  ........  OFR
    No. 5................................       33  ........  OFV
    No. 6................................       33  ........  OSX
Oil, misc.:
    Acid mixture from soyabean, corn            34  ........  AOM
     (maize) and sunflower oil refining.
    Aliphatic............................       33  ........  OML

[[Page 111]]

 
    Animal...............................       34  ........  OMA                AFN
    Aromatic.............................       33  ........  OMR
    Camelina.............................       34  ........  OCI
    Cashew nut shell (untreated).........       34  ........  OCN
    Clarified............................       33  ........  OCF
    Coal.................................       33  ........  OMC
    Coconut fatty acid...................       34         2  CFA
    Coconut, fatty acid methyl ester.....       34  ........  OCM
    Cotton seed oil, fatty acid..........       34  ........  CFY
    Crude................................       33  ........  OFA
    Diesel...............................       33  ........  ODS
    Disulfide (alternately Disulphide)...        0         1  ODI
    Gas, cracked.........................       33  ........  GOC
    Gas, high pour.......................       33  ........  OGP
    Gas, low pour........................       33  ........  OGL
    Gas, low sulfur (alternately sulphur)       33  ........  OGS
    Heartcut distillate..................       33  ........  OHD
    Jatropha.............................       34         3  JTO
    Lanolin..............................       34  ........  OLL                AFN
    Linseed..............................       33  ........  OLS
    Lubricating..........................       33         2  OLB
    Mineral..............................       33  ........  OMN
    Mineral seal.........................       33  ........  OMS
    Motor................................       33  ........  OMT
    Neatsfoot............................       33  ........  ONF                AFN
    Oiticica.............................       34  ........  OOI
    Palm acid............................       34  ........  PLM
    Palm fatty acid distillate...........       34  ........  PFD
    Palm oil, fatty acid methyl ester....       34  ........  OPE
    Palm kernel acid.....................       34  ........  OPK
    Palm kernel fatty acid distillate....       34  ........  PNG
    Palm, non-edible industrial grade....       34  ........  OPB
    Penetrating..........................       33  ........  OPT
    Perilla..............................       34  ........  OPR
    Pilchard.............................       34  ........  OPL                AFN
    Pine.................................       33  ........  OPI                PNL
    Rapeseed fatty acid methyl esters....       34         3  ORP
    Residual.............................       33  ........  ORL
    Resin, distilled.....................       30         3  ORR
    Road.................................       33  ........  ORD
    Rosin................................       33  ........  ORN
    Seal.................................       34  ........  OSE
    Soapstock............................       34  ........  OIS
    Soyabean (epoxidized)................       34  ........  .................  OSC/EVO
    Soyabean fatty acid methyl ester.....       34  ........  .................  OST
    Spindle..............................       33  ........  OSD
    Tall.................................       34  ........  OTL                OTI/OTJ
    Tall, crude..........................       34         2  OTI                OTJ/OTL
    Tall, distilled......................       34         2  OTJ                OTI/OTL
    Tall, fatty acid.....................       34         2  OTT
    Tall fatty acid (resin acids less           34         2  OTK                OTT
     than 20%).
    Tall pitch...........................       34  ........  OTP
    Transformer..........................       33  ........  OTF
    Tung.................................       34  ........  OTG
    Turbine..............................       33  ........  OTB
    Vacuum gas oil.......................       33  ........  OVC
Oleamide solution, see Octadecenoamide     .......  ........  .................  ODD
 solution.
Olefin-Alkyl ester copolymer (molecular         30  ........  OCP
 weight 2000+).
Olefin mixture (C7-C9) C8 rich,                 30         3  OFC                OFW/OFY/OFX
 stabilized.
Olefin mixtures (C5-C7)..................       30         3  OFY                OAM/OFC/OFW/OFX/OFZ
Olefin mixtures (C5-C15).................       30         3  OFY                OAM/OFC/OFW/OFX/OFZ
Olefins (C13+, all isomers)..............       30  ........  OFZ                OAM/OFW
alpha-Olefins (C6-C18) mixtures..........       30  ........  OAM                OFC/OFW/OFX/OFY/OFZ.
Oleic acid...............................        4  ........  OLA
Oleum....................................        0      1, 2  OLM                SAC/SFX.
Oleyl alcohol, see Alcohols (C13+).......  .......  ........  OYL                ALY (ASY)
Oleylamine...............................        7  ........  OLY
Olive oil, see Oil, edible: Olive........  .......  ........  .................  OOL (VEO)
Orange juice (concentrated)..............        0      1, 3  OJC                OJN
Orange juice (not concentrated)..........        0      1, 3  OJN                OJC

[[Page 112]]

 
Organomolybdenum amide...................       10  ........  OGA
ORIMULSION, see Asphalt emulsion.........  .......  ........  .................  ASQ
Oxyalkylated alkyl phenol formaldehyde...       33  ........  OPF
Oxygenated aliphatic hydrocarbon mixture.        0      1, 3  OAH
Palm acid oil, see Oil, misc.: Palm acid.  .......         3  .................  PLM
Palm fatty acid distillate, see Oil,       .......         3  .................  PFD
 misc.: Palm fatty acid distillate.
Palm kernel acid oil, see Oil, misc.:      .......  ........  .................  PNO
 Palm kernel acid.
Palm kernel acid oil, methyl ester, see    .......  ........  .................  PNF
 Oil, misc.: Palm kernel acid, methyl
 ester.
Palm kernel oil, see Oil, edible: Palm     .......  ........  .................  OPO (VEO)
 kernel.
Palm kernel oil fatty acid distillate,     .......  ........  .................  PNG
 see Oil, misc.: Palm kernel fatty acid
 distillate.
Palm kernel olein, see Oil, edible: Palm   .......         3  .................  PKO (VEO)
 kernel olein.
Palm kernel stearin, see Oil, edible:      .......         3  .................  PKS (VEO)
 Palm kernel stearin.
Palm mid fraction, see Oil, edible: Palm   .......         3  .................  PFM (VEO)
 mid fraction.
Palm oil, see Oil, edible: Palm..........  .......      2, 3  OPM                VEO/OPE
Palm oil fatty acid methyl ester, see      .......         3  .................  OPE
 Oil, misc.: Palm fatty acid methyl ester.
Palm olein, see Oil, edible: Palm olein..  .......         3  .................  PON (VEO)
Palm stearin, see Oil, edible: Palm        .......  ........  .................  PMS (VEO)
 stearin.
Parachlorobenzotrifluoride...............       32  ........  PBF
Paraffin wax, see Waxes: Paraffin........  .......         3  .................  WPF
n-Paraffins (C10-C20), see n-Alkanes       .......  ........  PFN                ALJ
 (C10+) all isomers.
Paraldehyde..............................       19  ........  PDH
Paraldehyde-Ammonia reaction product.....        9  ........  PRB
Peanut, see Oil, edible: Peanut..........  .......  ........  .................  OPN (VEO)
Pentachloroethane........................       36  ........  PCE
Pentacosa (oxypropane-2,3-diyl)s.........       20  ........  POY
Pentadecanol, see Alcohols (C13+)........        .  ........  PDC                ALY
1,3-Pentadiene...........................       30  ........  PDE                PDN.
1,3-Pentadiene (greater than 50%),              30         3  PMM
 Cyclopentene and isomers, mixtures.
Pentaethylene glycol, see Polyethylene     .......  ........  .................  PEG
 glycols.
Pentaethylene glycol methyl ether, see     .......  ........  .................  PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Pentaethylenehexamine....................        7  ........  PEN
Pentaethylenehexamine/                           7  ........  PEP
 Tetraethylenepentamine mixture.
Pentane (all isomers)....................       31  ........  PTY                IPT/PTA.
Pentanoic acid...........................        4  ........  POC.
n-Pentanoic acid (64%)/2-Methyl butyric          4  ........  POJ                POC
 acid (36%) mixture.
Pentasodium salt of                        .......  ........  .................  DYS
 Diethylenetriaminepentaacetic acid
 solution, see
 Diethylenetriaminepentaacetic acid,
 pentasodium salt solution.
Pentene (all isomers)....................       30  ........  PTX                PTE.
Pentyl aldehyde..........................       19  ........  PYL
n-Pentyl propionate......................       34  ........  PPE
Perchloroethylene........................       36         2  PER                TTE.
Petrolatum...............................       33  ........  PTL
Phenol...................................       21         2  PHN                PNS.
Phenol solutions (2% or less)............       43  ........  PNS                PHN.
1-Phenyl-1-xylyl ethane..................       32  ........  PXE
Phosphate esters.........................       34  ........  PZE
Phosphate esters, alkyl (C12-C14) amine..        7  ........  PEA
Phosphoric acid..........................        1         2  PAC
Phosphorus, yellow or white..............        0         1  PPW                PPB/PPR.
Phosphosulfurized (alternately                   0         1  PBT
 Phosphosulphurized) bicycle terpene.
Phthalate based polyester polyol.........        0      1, 2  PBE
Phthalic anhydride (molten)..............       11  ........  PAN
PIB, see Poly(4+)isobutylene (molecular
 weight  224).
alpha-Pinene.............................       30  ........  PIO                PIB/PIN.
beta-Pinene..............................       30  ........  PIP                PIN/PIO.
Pine oil, see Oil, misc.: Pine...........  .......  ........  PNL                OPI
Piperazine (70% or less).................        7         3  PIZ                PPB/PPZ
Piperazine (crude).......................        7  ........  PZC                PPZ/PIZ
Piperazine, 68% solution.................        7
Polyacrylic acid solution (40% or less)..       43  ........  PYA
Polyalkenyl succinic anhydride amine.....        7  ........  PSN
Polyalkyl acrylate.......................       14  ........  PAY
Polyalkyl (C18-C22) acrylate in Xylene...       14  ........  PIX
Polyalkylalkenaminesuccinimide,                  0         3  PSO
 molybdenum oxysulfide (alternately
 oxysulphide).
Polyalkylene glycols/Polyalkylene glycol        40  ........  PPX
 monoalkyl ethers mixtures.
Polyalkylene glycol butyl ether, see       .......  ........  PGB                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Poly(2-8)alkylene glycol monoalkyl (C1-         40         2  PAG
 C6) ether.

[[Page 113]]

 
Including:
    Diethylene glycol butyl ether........       40
    Diethylene glycol ethyl ether........       40
    Diethylene glycol n-hexyl ether......       40
    Diethylene glycol methyl ether.......       40
    Diethylene glycol propyl ether.......       40
    Dipropylene glycol butyl ether.......       40
    Dipropylene glycol methyl ether......       40
    Polyalkylene glycol butyl ether......       40
    Polyethylene glycol monoalkyl ether..       40
    Polypropylene glycol methyl ether....       40
    Tetraethylene glycol methyl ether....       40
    Triethylene glycol butyl ether.......       40
    Triethylene glycol ethyl ether.......       40
    Triethylene glycol methyl ether......       40
    Tripropylene glycol methyl ether.....       40
Poly(2-8)alkylene glycol monoalkyl (C1-         34  ........  PAF
 C6) ether acetate.
Including:
    Diethylene glycol butyl ether acetate       34
    Diethylene glycol ethyl ether acetate       34
    Diethylene glycol methyl ether              34
     acetate.
Polyalkylene oxide polyol................       20  ........  PAO
Polyalkylene glycols/Polyalkylene glycol        40  ........  PPX
 monoalkyl ethers mixtures.
Polyalkylene oxide polyol................       20  ........  PAO
Polyalkyl (C10-C20) methacrylate.........       14  ........  PMT                PYY.
Polyalkyl methacrylate in mineral oil....       14  ........  PYY                PMT.
Polyalkyl(C10-C18) methacrylate/Ethylene-       14  ........  PEM
 propylene copolymer mixture.
Polyalpha olefins........................       31  ........  PYO
Polyaluminum (alternately Polyaluminium)         1  ........  PLS
 chloride solution.
Polybutadiene, hydroxyl terminated.......       20  ........  PHT
Polybutene...............................       33  ........  PLB
Polybutenyl succinimide..................       10  ........  PBS
Polycarboxylic ester (C9+), see            .......  ........  .................  DTY
 Ditridecyl adipate.
Poly(2+)cyclic aromatics.................       32  ........  PCA
Polydimethylsiloxane, see                  .......  ........  .................  DMP
 Dimethylpolysiloxane.
Polyether, borated.......................       41  ........  PED
Polyether (molecular weight 1350+).......       41  ........  PYR
Polyether polyols........................       41  ........  PEO
Polyethylene glycol......................       40  ........  PEG
Polyethylene glycol dimethyl ether.......       40  ........  PEF
Poly(ethylene glycol) methylbutenyl ether       40  ........  PBN
 (molecular weight 1000).
Polyethylene glycol monoalkyl ether, see   .......  ........  PEE                PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Polyethylene polyamines..................        7         2  PEB                PEY.
Polyethylene polyamines (more than 50% C5-       7      2, 3  PEY                PEB
 C20 Paraffin oil).
Polyferric sulfate (alternately sulphate)       34  ........  PSS
 solution.
Polyglycerine/Sodium salts solution             20         2  PGT                PGS.
 (containing less than 3% Sodium
 hydroxide).
Polyglycerol.............................       20  ........  PGL
Poly(iminoethylene)-graft-N-                     7         3  PIG                PIM
 poly(ethyleneoxy) solution (90% or less).
Polyisobutenamine in aliphatic (C10-C14)         7         2  PIB                PIA
 solvent.
(Polyisobutene) amino products in                7         3
 aliphatic hydrocarbons.
Polyisobutenyl anhydride adduct..........       11  ........  PBA
Polyisobutenyl succinimide...............       10  ........  PIS
Poly(4+)isobutylene (molecular weight  224).
Polyisobutylene (molecular weight <= 224)       30         3  PIL
Polyisobutylene succinic anhydride.......       11  ........  PYS
Polymerized esters.......................       34  ........  PYM
Polymethylene polyphenyl isocyanate......       12         2  PPI
Polymethylsiloxane.......................       34  ........  PMX
Polyolefin (molecular weight 300+).......       33  ........  PMW                PLF
Polyolefin amide alkeneamine (C17+)......       33  ........  POH                POD
Polyolefin amide alkeneamine (C28+), see   .......  ........  POD                POH
 Polyolefin amide alkenamine (C17+).
Polyolefin amide alkeneamine borate (C28-       33  ........  PAB
 C250).
Polyolefin amide alkeneamine in mineral         33  ........  PLK
 oil.
Polyolefin amide alkeneamine/Molybdenum          7  ........  PMO
 oxysulfide (alternately oxysulphide)
 mixture.
Polyolefin amide alkeneamine polyol......       20  ........  PAP
Polyolefin amine (C17+)..................        7  ........  POG
Polyolefinamine (C28-C250)...............       33  ........  POM
Polyolefinamine in alkyl(C2-C4) benzenes.       32  ........  POF                POR.
Polyolefinamine in aromatic solvent......       32         3  POR                POF

[[Page 114]]

 
Polyolefin aminoester salts (molecular          34  ........  PAE
 weight 2000+).
Polyolefin anhydride.....................       11  ........  PAR
Polyolefin ester (C28-C250)..............       34  ........  POS
Polyolefin in mineral oil................       30  ........  PLF                PMW.
Polyolefin phenolic amine (C28-C250).....        9  ........  PPH
Polyolefin phosphorosulfide (alternately        34  ........  PPS
 phosphorosulphide), barium derivative
 (C28-C250).
Poly (oxyalkylene) alkenyl ether                41         3  PXY
 (molecular weight  1000).
Polyoxybutylene alcohol..................       41  ........  PXA
Poly(20)oxyethylene sorbitan monooleate..       34  ........  PSM
Polyoxypropylenediamine (molecular weight        7  ........  PYD
 2000).
Poly(5+) propylene.......................       30  ........  PLQ                PLP
Polypropylene glycol.....................       40         2  PGC
Polypropylene glycol methyl ether, see     .......  ........  PGM                PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Polysiloxane.............................       34  ........  PSX
Polysiloxane/White spirit, low (15-20%)         34  ........  PWS
 aromatic.
Poly(tetramethylene ether) glycols         .......  ........  PYU                HTO
 (molecular weight 950-1050), see alpha-
 hydro-omega-
 Hydroxytetradeca(oxytetramethylene).
Polytetramethylene ether glycol..........       40  ........  PYT                HTO/PYU/PYS
Poppy seed, see Oil, edible: Poppy seed..  .......  ........  .................  OPS (VEO)
Poppy, see Oil, edible: Poppy............  .......  ........  .................  OPY (VEO)
Potassium chloride solution..............       43  ........  PCU                PCD/PSD.
Potassium chloride solution (10% or more)       43  ........  PCS                PCD/PCU.
Potassium chloride solution (less than          43  ........  PSD                CLM/DRL/PCS/PCU.
 26%).
Potassium formate solutions..............       34  ........  PFR
Potassium hydroxide solution, see Caustic  .......         2  .................  CPS/PTH
 potash solution.
Potassium oleate.........................       34  ........  POE
Potassium polysulfide (alternately               0         1  PYP                PSF/PTF
 polysulphide)/Potassium thiosulfide
 (alternately thiosulphide) solution (41%
 or less).
Potassium salt of polyolefin acid........       34  ........  PSP
Potassium thiosulfate (alternately              43  ........  PTF
 thiosulphate) (50% or less).
Propane..................................       31  ........  PRP                LPG.
iso-Propanolamine, see Isopropanolamine..  .......  ........  .................  MPA (PAX/PLA)
n-Propanolamine..........................        8  ........  PLA                MPA/PAX.
2-Propene-1-aminium, N,N-dimethyl-N-2-           0      1, 3  PLN
 propenyl-, chloride, homopolymer
 solution.
Propionaldehyde..........................       19  ........  PAD
beta-Propiolactone.......................       18         3  PLT
Propionic acid...........................        4  ........  PNA
Propionic anhydride......................       11  ........  PAH
Propionitrile............................       37  ........  PCN
n-Propoxypropanol, see Propylene glycol    .......  ........  PXP                PGE
 monoalkyl ether.
n-Propyl acetate.........................       34  ........  PAT                IAC.
n-Propyl alcohol.........................       20         2  PAL                IPA.
n-Propyl chloride........................       36  ........  PRC
Propyl ether.............................       41  ........  .................  IPE/PRE
n-Propylamine............................        7  ........  PRA                IPO/IPP/IPQ
iso-Propylamine solution, see              .......  ........  .................  IPQ (IPO/IPP/PRA)
 Isopropylamine (70% or less) solution.
Propylbenzenes (all isomers), see Alkyl    .......  ........  PBY                AKC (CUM/PBZ)
 (C3-C4) benzenes.
iso-Propyl cyclohexane, see                .......  ........  .................  IPX
 Isopropylcyclohexane.
Propylene................................       30  ........  PPL
Propylene-Butylene copolymer.............       30  ........  PBP
Propylene carbonate......................       34  ........  PLC
Propylene dimer..........................       30  ........  PDR
Propylene glycol.........................       20         2  PPG
Propylene glycol n-butyl ether, see        .......  ........  PGD                PGE
 Propylene glycol monoalkyl ether.
Propylene glycol ethyl ether, see          .......  ........  PGY                PGE
 Propylene glycol monoalkyl ether.
Propylene glycol methyl ether, see         .......         2  PME                PGE
 Propylene glycol monoalkyl ether.
Propylene glycol methyl ether acetate....       34         2  PGN
Propylene glycol monoalkyl ether.........       40  ........  PGE
Including:
    n-Propoxypropanol....................       40
    Propylene glycol n-butyl ether.......       40
    Propylene glycol ethyl ether.........       40
    Propylene glycol methyl ether........       40
    Propylene glycol propyl ether........       40
Propylene glycol phenyl ether............       40  ........  PGP
Propylene glycol propyl ether, see         .......  ........  .................  PGE
 Propylene glycol monoalkyl ether.
Propylene oxide..........................       16  ........  POX
Propylene tetramer.......................       30  ........  PTT
Propylene trimer.........................       30  ........  PTR
Propylene/Propane/MAPP gas mixture.......       30         2  PPM

[[Page 115]]

 
Pseudocumene, see Trimethylbenzene (all    .......  ........  .................  TMB/TMD/TME/TRE
 isomers).
Pyridine.................................        9  ........  PRD
Pyridine bases, see Paraldehyde-Ammonia    .......  ........  .................  PRB
 reaction product.
Pyrolysis gasoline (containing Benzene)..       32         3  PYG                GPY
Rapeseed oil (low erucic acid containing   .......         3  .................  ORO (VEO)
 less than 4% free fatty acids), see Oil,
 edible: Rapeseed (low erucic acid
 containing less than 4% free fatty
 acids).
Rapeseed oil fatty acid methyl esters,     .......         3  .................  RSO
 see Oil, misc.: Rapeseed fatty acid
 methyl esters.
Rapeseed oil, see Oil, edible: Rapeseed..  .......  ........  .................  ORO (VEO)
Refrigerant gases........................        0         1  RFG
Resin oil, distilled, see Oil, misc.:      .......         3  .................  ORR (ORS)
 Resin, distilled.
Rice bran oil, see Oil, edible: Rice bran  .......  ........  .................  ORB
Rosin soap (disproportionated) solution..       43  ........  RSP
Rosin, see Oil, misc.: Rosin.............  .......  ........  .................  ORN
Rum, see Alcoholic beverages, n.o.s......  .......  ........  .................  ABV
Safflower oil, see Oil, edible: Safflower  .......  ........  .................  OSF (VEO)
Sewage sludge............................       43  ........  SWS
Shea butter, see Oil, edible: Shea butter  .......         3  .................  OSH (VEO)
Silica slurry............................       43  ........  SLC
Siloxanes................................       34  ........  SLX
Sludge, treated..........................       43  ........  SWA
Sodium acetate solutions.................       34  ........  SAN
Sodium acetate, Glycol, Water mixture            5         2  SAY                SAO/SAP/SAQ/SAY
 (containing 1% or less Sodium hydroxide)
 (if non-flammable or non-combustible).
Sodium acetate, Glycol, Water mixture            5  ........  SAQ                SAO/SAP/SAW/SAY
 (containing Sodium hydroxide).
Sodium acetate, Glycol, Water mixture           34         2  SAW                SAO/SAP/SAQ/SAY
 (not containing Sodium hydroxide).
Sodium alkyl (C14-C17) sulfonates               34  ........  SSU                AKA/AKE
 (alternately sulphonates) (60-65%
 solution).
Sodium aluminate solution................        5  ........  SAV                SAU.
Sodium aluminate solution (45% or less)..        5  ........  SAU                SAV.
Sodium aluminosilicate slurry............       34  ........  SLR
Sodium benzoate..........................       34  ........  SBN                SBM
Sodium bicarbonate solution (less than          34         3  SBC
 10%).
Sodium borohydride (15% or less)/Sodium          5  ........  SBX                CSS/SBH/SBI/SHD.
 hydroxide solution.
Sodium bromide solution (less than 50%)..       43         3  SBL                SBR
Sodium carbonate solution................        5  ........  SCE
Sodium chlorate solution (50% or less)...        0      1, 2  SDD                SDC.
Sodium cyanide solution..................        5  ........  SCO                SCN/SCS.
Sodium dichromate solution (70% or less).        0      1, 2  SDL                SCR.
Sodium dimethyl naphthalene sulfonate      .......  ........  .................  DNS
 solution, see Dimethyl naphthalene
 sulfonic (alternately sulphonic) acid,
 sodium salt solution.
Sodium hydrogen sulfide (alternately             0   1, 2, 3  SSS                SCE/SHW
 sulphide) (6% or less)/Sodium carbonate
 (3% or less) solution.
Sodium hydrogen sulfite (alternately            43  ........  SHY                SHX
 sulphite) solution (45% or less).
Sodium hydrosulfide (alternately                 5         2  SSA                ASF/ASS
 hydrosulphide)/Ammonium sulfide
 (alternately sulphide) solution.
Sodium hydrosulfide (alternately                 5         2  SHR
 hydrosulphide) solution (45% or less).
Sodium hydroxide solution, see Caustic     .......         2  .................  CSS (SHD)
 soda solution.
Sodium hypochlorite solution (15% or             5  ........  SHP                SHC/SHQ.
 less).
Sodium hypochlorite solution (20% or             5  ........  SHQ                SHC/SHP.
 less).
Sodium lignosulfonate (alternately              43  ........  SLG                LNL
 lignosulphonate) solution.
Sodium long-chain alkyl salicylate (C13+)       34  ........  SLS
Sodium-2-mercaptobenzothiazol solution,    .......  ........  .................  SMB
 see Mercaptobenzothiazol, sodium salt
 solution.
Sodium methoxide (25% in methanol).......        0         1  SMO
Sodium methylate 21-30% in methanol......        0   1, 2, 3  SMT                SMS
Sodium naphthalene sulfonate (alternately  .......  ........  SNS                NSA (NSB)
 sulphonate) solution, see Naphthalene
 sulfonic (alternately sulphonic) acid
 (40% or less), sodium salt solution (40%
 or less).
Sodium naphthenate solution, see           .......  ........  .................  NTS
 Naphthenic acid, sodium salt solution.
Sodium nitrite solution..................        5  ........  SNI                SNT.
Sodium N-methyl dithio carbamate           .......  ........  MSS                SMD
 solution, see Metam sodium solution.
Sodium petroleum sulfonate (alternately         34  ........  SPS
 sulphonate).
Sodium poly(4+)acrylate solution.........       43         2  SOP                SOO
Sodium polyacrylate solution.............       43         2  SOO                SOP
Sodium salt of Ferric                      .......  ........  STA                FHX
 hydroxyethylethylenediaminetriacetic
 acid solution, see Ferric
 hydroxyethylethylenediaminetriacetic
 acid, trisodium salt solution.
Sodium silicate solution.................       43         2  SSN                SSC.
Sodium sulfate (alternately sulphate)           34         3  SST                SSO
 solution.
Sodium sulfide (alternately sulphide)           43  ........  SDR                SDS
 solution (15% or less).
Sodium sulfide (alternately sulphide)/           0      1, 2  SSH                SDS/SHR/SSI/SSJ
 Hydrosulfide (alternately Hydrosulphide)
 solution (H2S 15 ppm or less).

[[Page 116]]

 
Sodium sulfide (alternately sulphide)/           0      1, 2  SSI                SDS/SHR/SSH/SSJ
 Hydrosulfide (alternately Hydrosulphide)
 solution (H2S greater than 15 ppm but
 less than 200 ppm).
Sodium sulfide (alternately sulphide)/           0      1, 2  SSJ                SDS/SHR/SSH/SSI
 Hydrosulfide (alternately Hydrosulphide)
 solution (H2S greater than 200 ppm).
Sodium sulfite (alternately sulphite)           43  ........  SUP                SSF/SUS
 solution (25% or less).
[ADD]
Sodium tartrates/Sodium succinates              43  ........  STM
 solution.
Sodium thiocyanate solution (56% or less)        0      1, 2  STS                SCY.
Sorbitol solution........................       20  ........  SBU                SBT.
Soyabean fatty acid methyl ester, see      .......  ........  .................  OST
 Oil, misc.: Soyabean fatty acid methyl
 ester.
Soyabean oil (epoxidized)................       34  ........  .................  OSC/EVO
Soyabean oil, see Oil, edible: Soyabean..  .......         2  .................  OSB (VEO)
Stearic acid, see Fatty acids (saturated,  .......  ........  SRA                FAD (FAB/FAE/FDI/FDT)
 C13+).
Stearyl alcohol..........................       20  ........  SYL                ALY/ASY.
Stoddard solvent, see Naphtha: Stoddard    .......  ........  .................  NSS
 solvent.
Styrene monomer..........................       30  ........  STY
Sulfohydrocarbon (alternately                   33  ........  SFO
 Sulphohydrocarbon) (C3-C88).
Sulfohydrocarbon (alternately                    7  ........  SFX
 Sulphohydrocarbon), long-chain (C18+)
 alkylamine mixture.
Sulfolane (alternately Sulpholane).......       39  ........  SFL
Sulfonated (alternately Sulphonated)            43         2  SPA
 polyacrylate solutions.
Sulfur (alternately Sulphur) (molten)....        0      1, 2  SXX
Sulfur (alternately Sulphur) dioxide.....        0         1  SFD
Sulfuric (alternately Sulphuric) acid....        2         2  SFA                SAC
Sulfuric (alternately Sulphuric) acid,           2         2  SAC                SFA
 spent.
Sulfurized (alternately Sulphurized) fat        33  ........  SFT
 (C14-C20).
Sulfurized (alternately Sulphurized)            10  ........  SPY
 polyolefinamide.
Sulfurized (alternately Sulphurized)            33  ........  SPO
 polyolefinamide alkene (C28-C250) amine.
Sunflower seed oil, see Oil, edible:            34  ........  .................  OSN (VEO)
 Sunflowerseed.
Sym-trichlorobenzene, see 1,2,4-
 Trichlorobenzene.
Tall oil, see Oil, misc.: Tall...........  .......  ........  .................  OTL (OTI/OTJ)
Tall oil, crude, see Oil, misc.: Tall,     .......      2, 3  .................  OTI (OTJ/OTL)
 crude.
Tall oil, distilled, see Oil, misc.:       .......         3  .................  OTJ (OTI/OTL)
 Tall, distilled.
Tall oil, fatty acid, see Oil, misc.:      .......         2  .................  OTT
 Tall fatty acid.
Tall oil fatty acid (resin acids less      .......         2  .................  OTK (OTT)
 than 20%), see Oil, misc.: Tall oil
 fatty acid (resin less than 20%).
Tall oil fatty acid, barium salt.........        0      1, 2  TOB
Tall oil pitch, see Oil, misc.: Tall       .......         3  .................  OTP (OTI/OTJ/OTL)
 pitch.
Tall oil soap (crude)....................       34  ........  TOR                TOS
Tall oil soap (disproportionated)               43  ........  TOS
 solution.
Tallow...................................       34         2  TLO
Tallow alcohol, see Alcohols (C13+)......  .......         2  TFA                ALY (ASY)
Tallow alkyl nitrile.....................       37  ........  TAN
Tallow fatty acid........................       34         2  TFD
Tallow fatty alcohol, see Alcohols (C13+)  .......         2  TFA                ALY
TAME, see tert-Amyl methyl ether.........  .......  ........  .................  AYE
Tertiary butylphenols....................       21  ........  BLT                BTP
Tetrachloroethane........................       36  ........  TEC
1,1,2,2-Tetrachloroethane, see                  36  ........  TEC                TEE
 Tetrachloroethane.
Tetradecanol, see Alcohols (C13+)........  .......  ........  TTN                ALY
Tetradecene, see olefins or alpha-olefin   .......  ........  .................  OAM/OFY/OFW/OFZ/TDD
 entries.
Tetradecylbenzene, see Alkyl (C9+)         .......  ........  TDB                AKB
 benzenes.
Tetraethyl silicate monomer/oligomer (20%        0      1, 3  TSM
 in ethanol).
Tetraethylene glycol.....................       40  ........  TTG
Tetraethylene glycol methyl ether, see     .......  ........  .................  PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Tetraethylenepentamine...................        7         2  TTP
Tetrahydrofuran..........................       41  ........  THF
Tetrahydronaphthalene....................       32  ........  THN
Tetramethylbenzene (all isomers).........       32  ........  TTC                TTB.
1,2,3,5-Tetramethylbenzene, see            .......  ........  TTB                TTC
 Tetramethylbenzene (all isomers).
Tetrapropylbenzene, see                    .......  ........  .................  AKB
 Alkyl(C9+)benzenes.
Tetrasodium salt of                        .......  ........  .................  EDS
 ethylenediaminetetraacetic acid
 solution, see Ethylenediaminetetraacetic
 acid, tetrasodium salt solution.
Titanium dioxide slurry..................       43  ........  TDS
Titanium tetrachloride...................        2  ........  TTT
Toluene..................................       32         2  TOL
Toluene diisocyanate.....................       12         2  .................  TDI

[[Page 117]]

 
Toluenediamine...........................        9  ........  TDA
o-Toluidine..............................        9         2  TLI                TOD/TOI
Triarylphosphate, see Triisopropylated     .......  ........  TRA                TPL
 phenyl phosphates.
Tributyl phosphate.......................       34  ........  TBP
1,2,3-Trichlorobenzene (molten)..........       36         3  TBZ                TCB
1,2,4-Trichlorobenzene...................       36  ........  TCB                TBZ.
1,2,3-Trichlorobenzol, see 1,2,3-          .......  ........  TBZ                TCB
 Trichlorobenzene (molten).
1,1,1-Trichloroethane....................       36         2  TCE                TCM.
1,1,2-Trichloroethane....................       36  ........  TCM                TCE.
Trichloroethylene........................       36         2  TCL
1,1,2-Trichloro-1,2,2-trifluoroethane....       36  ........  TTF
Tricresyl phosphate (containing 1% or           34         3  TCO                TCP/TCQ
 more ortho-isomer).
Tricresyl phosphate (containing less than       34         3  TCP                TCO/TCQ
 1% ortho-isomer).
1,2,3-Trichloropropane...................       36         2  TCN
Tridecane (all isomers), see n-Alkanes     .......  ........  TRD                ALV (ALJ)
 (C10+) (all isomers).
Tridecanoic acid.........................       34  ........  TDO
Tridecanol, see Alcohols (C13+)..........  .......  ........  TDN                ALY (ASK/ASY/AYK/LAL)
Tridecene, see Olefins (C13+ all isomers)  .......  ........  TRD                OAM/OFY/OFW/OFZ/TDC
Tridecyl acetate.........................       34  ........  TAE
Tridecylbenzene, see Alkyl (C9+) benzenes  .......  ........  TRB                AKB
Triethanolamine..........................        8         2  TEA
Triethylamine............................        7  ........  TEN
Triethylbenzene..........................       32  ........  TEB
Triethylene glycol.......................       40  ........  TEG
Triethylene glycol butyl ether, see        .......  ........  TBE                PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Triethylene glycol butyl ether mixture...       40  ........  TBD
Triethylene glycol di-(2-ethylbutyrate)..       34  ........  TGD
Triethylene glycol dibenzoate............       34  ........  TGB
Triethylene glycol ether mixture.........       40  ........  TYM
Triethylene glycol ethyl ether, see        .......  ........  TGE                PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Triethylene glycol methyl ether, see       .......  ........  TGY                PAG
 Poly(2-8)alkylene glycol monoalkyl (C1-
 C6) ether.
Triethylenetetramine.....................        7         2  TET
Triethyl phosphate.......................       34  ........  TPS
Triethyl phosphite.......................       34         2  TPI
Triisobutylene...........................       30  ........  TIB
Triisooctyl trimellitate.................       34  ........  TIS
Triisopropanolamine......................        8  ........  TIP
Triisopropanolamine salt of 2,4-           .......  ........  .................  DTI
 Dichlorophenoxyacetic acid solution, see
 2,4-Dichlorophenoxyacetic acid,
 Triisopropanolamine salt solution.
Triisopropylated phenyl phosphates.......       34  ........  TPL
Trimethylacetic acid.....................        4  ........  TAA
Trimethylamine solution (30% or less)....        7  ........  TMT                TMA.
Trimethylbenzene (all isomers)...........       32  ........  TRE                TMB/TMD/TME.
Trimethyl nonanol, see Dodecyl alcohol...  .......  ........  .................  DDN (ASK/ASY/LAL)
Trimethylol propane polyethoxylated......       20  ........  TPR
Trimethyl phosphite......................       34         2  TPP
Trimethylhexamethylene diisocyanate             12  ........  THI
 (2,2,4- and 2,4,4-).
Trimethylhexamethylenediamine (2,2,4- and        7  ........  THA
 2,4,4-).
2,2,4-Trimethyl-1,3-pentanediol                 34  ........  TMQ
 diisobutyrate.
2,2,4-Trimethyl-1,3-pentanediol-1-              34  ........  TMP
 isobutyrate.
2,2,4-Trimethyl-3-pentanol-1-isobutyrate.       34  ........  TMR
1,3,5-Trioxane...........................       41         2  TRO
Triphenylborane (10% or less)/Caustic            5  ........  TPB
 soda solution.
Tripropylene, see Propylene trimer.......  .......  ........  .................  PTR
Tripropylene glycol......................       40  ........  TGC
Tripropylene glycol methyl ether, see      .......  ........  TGM                PAG
 Poly(2-8)alkylene glycol monoalkyl(C1-
 C6) ether.
Trisodium nitrilotriacetate solution, see  .......  ........  TSO                NCA (TSN)
 Nitrilotriacetic acid, trisodium salt
 solution.
Trisodium phosphate solution.............        5  ........  TSP
Trisodium salt of N-                       .......  ........  .................  HET
 (Hydroxyethyl)ethylenediaminetriacetic
 acid solution, see N-
 (Hydroxyethyl)ethylenediaminetriacetic
 acid, trisodium salt solution.
Trixylyl phosphate.......................       34  ........  .................  TRP
Trixylenyl phosphate, see Trixylyl         .......  ........  .................  TRP
 phosphate.
Tung oil, see Oil, misc.: Tung...........  .......  ........  .................  OTG
Turpentine...............................       30  ........  TPT
Turpentine substitute, see White spirit    .......  ........  .................  WSL (WSP)
 (low (15-20%) aromatic).

[[Page 118]]

 
Undecane (all isomers), see Alkanes        .......  ........  UDN                ALV (ALJ)
 (C10+) (all isomers).
Undecanoic acid..........................        4  ........  UDA
Undecanol, see Undecyl alcohol...........  .......  ........  .................  UND (ALR)
Undecene.................................       30  ........  UDD                UDC.
1-Undecene...............................       30  ........  UDC                UDD.
Undecyl alcohol..........................       20  ........  UND                ALR.
Undecylbenzene, see Alkyl (C9+) benzenes.  .......  ........  UDB                AKB
Urea solution............................       43  ........  USL                URE
Urea, Ammonium mono- and di-hydrogen             0         1  UPX
 phosphate/Potassium chloride solution.
Urea/Ammonium nitrate solution                  43         2  UAU                ANU/UAS/UAT/UAV
 (containing less than 1% free Ammonia).
Urea/Ammonium nitrate solution                   6  ........  UAT                ANU/UAS
 (containing 1% or more free Ammonia).
Urea/Ammonium phosphate solution.........       43  ........  UAP.
Vacuum gas oil, see oil misc.: Vacuum gas       33  ........  OVC
 oil.
Valeraldehyde (all isomers)..............       19  ........  VAK                IVA/VAL
Vanillin black liquor (free alkali               5  ........  VBL
 content 3% or more).
Vegetable acid oils, n.o.s...............       34  ........  VAD
Including:
    Corn acid oil........................       34
    Cottonseed acid oil..................       34
    Dark mixed acid oil..................       34
    Groundnut acid oil...................       34
    Mixed acid oil.......................       34
    Mixed general acid oil...............       34
    Mixed hard acid oil..................       34
    Mixed soft acid oil..................       34
    Rapeseed acid oil....................       34
    Safflower acid oil...................       34
    Soya acid oil........................       34
    Sunflower seed acid oil..............       34
Vegetable fatty acid distillates, n.o.s..       34         3  VFD
Including:
    Palm kernel fatty acid distillate....       34
    Palm oil fatty acid distillate.......       34
    Tall fatty acid distillate...........       34
    Tall oil fatty acid distillate.......       34
Vegetable oils, n.o.s....................       34  ........  VAD
Including:
    Beechnut oil.........................       34
    Camelina oil.........................       34
    Cashew nut shell.....................       34
    Castor oil...........................       34
    Cocoa butter.........................       34
    Coconut oil..........................       34         2
    Corn oil.............................       34
    Cottonseed oil.......................       34
    Croton oil...........................       34
    Grape seed oil.......................       34
    Groundnut acid oil...................       34
    Hazelnut oil.........................       34
    Illipe oil...........................       34
    Jatropha oil.........................       34         3
    Linseed oil..........................       34
    Mango kernel oil.....................       34
    Nutmeg butter........................       34
    Oiticica oil.........................       34
    Olive oil............................       34
    Palm kernel oil......................       34
    Palm kernel olein....................       34
    Palm kernel stearin..................       34
    Palm mid fraction....................       34
    Palm, non-edible industrial grade....       34
    Palm oil.............................       34      2, 3
    Palm olein...........................       34
    Palm stearin.........................       34
    Peanut oil...........................       34
    Peel oil (oranges and lemons)........       34
    Perilla oil..........................       34
    Pine oil.............................       34
    Poppy seed oil.......................       34
    Poppy oil............................       34
    Raisin seed oil......................       34
    Rapeseed oil.........................       34

[[Page 119]]

 
    Rapeseed (low erucic acid containing        34         3
     less than 4% free fatty acids).
    Resin oil, distilled.................       30         3
    Rice bran oil........................       34
    Rosin oil............................       34
    Safflower oil........................       34
    Salad oil............................       34
    Sesame oil...........................       34
    Shea butter..........................       34
    Soyabean oil.........................       34         2
    Sunflower seed oil...................       34
    Tall.................................       34
    Tall, crude..........................       34
    Tall, distilled......................       34
    Tall, pitch..........................       34
    Tucum oil............................       34
    Tung oil.............................       34
    Walnut oil...........................       34
Vegetable protein solution (hydrolyzed)..       43  ........  VPS
Vinyl acetate............................       13         2  VAM
Vinyl chloride...........................       35  ........  VCM
Vinyl ethyl ether........................       13  ........  VEE
Vinylidene chloride......................       35  ........  VCI
Vinyl neodecanoate.......................       13         2  VND
Vinyltoluene.............................       13  ........  VNT
Water....................................       43  ........  WTR
Waxes....................................  .......  ........  WAX
Including:
    Candelilla...........................       34  ........  WCD
    Carnauba.............................       34  ........  WCA
    Paraffin.............................       31  ........  WPF
    Petroleum............................       33  ........  WPT
White spirit, see White spirit (low (15-   .......  ........  WSP                WSL
 20%) aromatic).
White spirit (low (15-20%) aromatic).....       33  ........  WSL                WSP.
Wine, see Alcoholic beverages............  .......  ........  ABV
Wood lignin with Sodium acetate/oxalate..        0      1, 3  WOL
Xylenes..................................       32         2  XLX                XLM/XLO/XLP
Xylenes/Ethylbenzene (10% or more)              32  ........  XEB
 mixture.
Xylenols.................................       21  ........  XYL
Zinc alkaryl dithiophosphate (C7-C16)....       34  ........  ZAD
Zinc alkenyl carboxamide.................       10  ........  ZAA                WSL
Zinc alkyl dithiophosphate (C3-C14)......       34  ........  ZAP
Zinc bromide/Calcium bromide solution,     .......  ........  .................  DZB
 see Drilling brine (containing Zinc
 salts).
----------------------------------------------------------------------------------------------------------------
Notes:
1. Because of very high reactivity, unusual conditions of carriage, or potential compatibility problems, this
  commodity is not assigned to a specific group in Figure 1 to 46 CFR part 150 (Compatibility Chart).
2. See Appendix I to 46 CFR part 150 (Exceptions to the Chart).
3. Entry was added from the March 2012 Annex to the 2007 edition of the IBC Code (MEPC 63/23/Add.1), the
  December 2012 IMO Marine Environmental Protection Committee Circular (MEPC.2/Circ.18), or the December 2013
  IMO Marine Environmental Protection Committee Circular (MEPC.2/Circ.19).
4. Italicized words are not part of the cargo name but may be used in addition to the cargo name.


[78 FR 50162, Aug. 16, 2013, as amended at USCG-2013-0423, 85 FR 21674, 
Apr. 17, 2020; USCG-2013-0423, 85 FR 27309, May 8, 2020]



              Sec. Table 2 to Part 150--Grouping of Cargoes

------------------------------------------------------------------------
               Group                                Cargo
------------------------------------------------------------------------
0. Unassigned Cargoes.............  Acetone cyanohydrin.
                                    Alkenoic acid, polyhydroxy ester
                                     borated.
                                    Alkylbenzene distillation bottoms.
                                    Alkyl (C8-C10)/(C12-C14) : (60% or
                                     more/40% or less)
                                    Alkyl (C11-C17) benzene sulfonic
                                     (alternately sulphonic) acid.
                                    Alkylbenzene sulfonic (alternately
                                     sulphonic) acid (less than 4%).
                                    Alkyl (C18-C28) toluenesulfonic
                                     (alternately toluenesulphonic)
                                     acid.
                                    Aluminum (alternately Aluminium)
                                     chloride/Hydrogen chloride
                                     solution.
                                    Ammonium hydrogen phosphate
                                     solution.
                                    Ammonium nitrate solution (45% or
                                     less).
                                    Ammonium nitrate solution (93% or
                                     less).
                                    Ammonium thiocyanate/Ammonium
                                     thiosulfate (alternately
                                     thiosulphate) solution.
                                    Argon, liquefied.

[[Page 120]]

 
                                    Benzenesulfonyl (alternately
                                     Benzenesulphonyl) chloride.\1\
                                    gamma-Butyrolactone.\1\
                                    Carbon dioxide (high purity).
                                    Carbon dioxide (reclaimed quality).
                                    Carbon dioxide, liquefied.
                                    Chlorine.
                                    2-Chloro-4-ethylamino-6-
                                     isopropylamino-5-triazine solution.
                                    Chlorosulfonic (alternately
                                     Chlorosulphonic) acid.
                                    Decyloxytetrahydro-thiophene
                                     dioxide.
                                    2,4-Dichlorophenoxyacetic acid,
                                     Dimethylamine salt solution (70% or
                                     less).\1\
                                    Dimethyl disulfide (alternately
                                     disulphide).
                                    Diphenylol propane-Epichlorohydrin
                                     resins.
                                    Disulfide (alternately Disulphide).
                                    Dodecyl hydroxypropyl sulfide
                                     (alternately sulphide).\1\
                                    Dodecylbenzenesulfonic (alternately
                                     Dodecylbenzenesulphonic) acid.\1\
                                    Ethylene oxide.
                                    Hydrogen peroxide solutions (over
                                     60% but not more than 70% by mass).
                                    Hydrogen peroxide solutions (over 8%
                                     but not more than 60% by mass).
                                    Hydrogenated starch hydrolysate.
                                    Lactic acid.\1\
                                    Liquid chemical wastes.
                                    Long-chain alkaryl sulfonic
                                     (alternately sulphonic) acid (C16-
                                     C60).\1\
                                    Magnesium chloride solution.\1\
                                    Maltitol solution.
                                    Methylcyclopentadienyl manganese
                                     tricarbonyl.
                                    Methylcyclopentadienyl manganese
                                     tricarbonyl (60-70%) in mineral
                                     oil.
                                    Molasses residue (from
                                     fermentation).
                                    Molybdenum polysulfide (alternately
                                     polysulphide) long-chain alkyl
                                     dithiocarbamide complex.
                                    Motor fuel anti-knock compound
                                     (containing lead alkyls).
                                    Naphthalene sulfonic (alternately
                                     sulphonic) acid-formaldehyde
                                     copolymer, sodium salt solution.
                                    Nitrating acid (mixture of Sulfuric
                                     (alternately Sulphuric) and Nitric
                                     acids).
                                    Nitric acid (70% and over).\1\
                                    Nitric acid fuming.
                                    Nitric acid red fuming.
                                    Nitrogen.
                                    o-Nitrophenol (molten).\1\
                                    Noxious Liquid Substance, NF, (1)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat X.
                                    Noxious Liquid Substance, F, (2)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat X.
                                    Noxious Liquid Substance, NF, (3)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat X.
                                    Noxious Liquid Substance, F, (4)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat X.
                                    Noxious Liquid Substance, NF, (5)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Y.
                                    Noxious Liquid Substance, F, (6)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Y.
                                    Noxious Liquid Substance, NF, (7)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Y.
                                    Noxious Liquid Substance, F, (8)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Y.
                                    Noxious Liquid Substance, NF, (9)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Z.
                                    Noxious Liquid Substance, F, (10)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Z.
                                    Noxious Liquid Substance, (11)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat Z.
                                    Non-noxious Liquid Substance, (12)
                                     n.o.s. (``trade name'' contains
                                     ``principal components'') Cat OS.
                                    n-Octyl Mercaptan.
                                    Orange juice (concentrated).
                                    Orange juice (not concentrated).
                                    Oxygenated aliphatic hydrocarbon
                                     mixture.
                                    Phosphorus, yellow or white.
                                    Phosphosulfurized (alternately
                                     Phosphosulphurized) bicycle
                                     terpene.
                                    Phthalate-based polyester polyol.\1\
                                    Polyalkylalkenaminesuccinimide,
                                     molybdenum oxysulfide.
                                    Potassium polysulfide (alternately
                                     polysulphide), Potassium
                                     thiosulfide (alternately
                                     thiosulphide) solution (41% or
                                     less).
                                    2-Propene-1-aminium, N,N-dimethyl-N-
                                     2-propenyl-, chloride, homopolymer
                                     solution.
                                    Refrigerant gases.
                                    Sodium chlorate solution (50% or
                                     less).\1\
                                    Sodium dichromate solution (70% or
                                     less).\1\
                                    Sodium hydrogen sulfide (alternately
                                     sulphide) (6% or less)/Sodium
                                     carbonate (3% or less) solution.\1\
                                    Sodium methoxide (25% in methanol).
                                    Sodium methylate (21-30% in
                                     methanol).

[[Page 121]]

 
                                    Sodium sulfide (alternately
                                     sulphide)/Hydrosulfide (alternately
                                     Hydrosulphide) solution (H2S 15 ppm
                                     or less).
                                    Sodium sulfide (alternately
                                     sulphide), Hydrosulfide
                                     (alternately Hydrosulphide)
                                     solution (H2S greater than 15 ppm
                                     but less than 200 ppm).\1\
                                    Sodium sulfide (alternately
                                     sulphide)/Hydrosulfide (alternately
                                     Hydrosulphide) solution (H2S
                                     greater than 200 ppm).
                                    Sodium thiocyanate solution (56% or
                                     less).\1\
                                    Sulfur (alternately Sulphur)
                                     (molten).
                                    Sulfur (alternately Sulphur)
                                     dioxide.
                                    Tall oil fatty acid, barium salt.\1\
                                    Tetraethyl silicate monomer/oligomer
                                     (20% in ethanol).
                                    Urea, Ammonium mono- and di-hydrogen
                                     phosphate/Potassium chloride
                                     solution.
                                    Wood lignin with Sodium acetate/
                                     oxalate.
1. Non-Oxidizing Mineral Acids....  Di-(2-ethylhexyl) phosphoric acid.
                                    Ferric chloride solution
                                    Fluorosilicic acid (20-30%) in water
                                     solution
                                    Fluorosilicic acid (30% or less)
                                    Hydrochloric acid
                                    Hydrofluorosilicic acid (25% or
                                     less).
                                    Phosphoric acid
                                    Polyaluminum (alternately
                                     Polyaluminium) chloride solution.
2. Sulfuric (Alternately            Sulfuric (alternately Sulphuric)
 Sulphuric) Acids.                   acid.\1\
                                    Sulfuric (alternately sulphuric)
                                     acid, spent.
                                    Titanium tetrachloride
3. Nitric Acids...................  Ferric nitrate/Nitric acid solution.
                                    Nitric acid (70% or less).
4. Organic Acids..................  Acetic acid.\1\
                                    Acetic acid.\1\
                                    Acrylic acid.\1\
                                    Butyric acid.
                                    Chloroacetic acid (80% or less).
                                    2- or 3-Chloropropionic acid.
                                    Citric acid (70% or less).
                                    Decanoic acid.
                                    2,2-Dichloropropionic acid.
                                    Dimethyl octanoic acid.
                                    Formic acid.\1\
                                    Formic acid (85% or less).
                                    Formic acid (over 85%).
                                    Formic acid mixture (containing up
                                     to 18% Propionic acid and up to 25%
                                     Sodium formate).
                                    Glycolic acid (70% or less).
                                    Glyoxylic acid solution (50% or
                                     less).
                                    n-Heptanoic acid.
                                    1,6-Hexanediol, distillation
                                     overheads.
                                    Hexanoic acid
                                    2-Hydroxy-4-(methylthio)butanoic
                                     acid
                                    Jatropha oil
                                    Long-chain alkyl (C13+) salicylic
                                     acid.
                                    Methacrylic acid.
                                    Naphthenic acid.
                                    Neodecanoic acid.
                                    Nonanoic acid (all isomers).
                                    Nonanoic/Tridecanoic acid mixture.
                                    Octanoic acid (all isomers).
                                    Oleic acid.
                                    Pentanoic acid.
                                    n-Pentanoic acid (64%)/2-Methyl
                                     butyric acid (36%) mixture.
                                    Propionic acid.
                                    Trimethylacetic acid
                                    Undecanoic acid
5. Caustics.......................  Aluminum (alternately Aluminium)
                                     hydroxide/sodium hydroxide/sodium
                                     carbonate solution (40% or less).
                                    Ammonium sulfide (alternately
                                     sulphide) solution (45% or less).
                                    Calcium hydroxide slurry.
                                    Calcium hypochlorite solution (15%
                                     or less).
                                    Calcium hypochlorite solution (more
                                     than 15%).
                                    Caustic potash solution.\1\
                                    Caustic soda solution.\1\
                                    Cresylic acid, sodium salt solution.
                                    1,4-Dihydro-9,10-dihydroxy
                                     anthracene, disodium salt solution.
                                    Kraft black liquor.
                                    Kraft pulping liquors (free alkali
                                     content 3% or more) (Black, Green,
                                     or White).
                                    Magnesium hydroxide slurry.

[[Page 122]]

 
                                    Mercaptobenzothiazol, sodium salt
                                     solution.
                                    2-Mercaptobenzothiazol (in liquid
                                     mixture).
                                    Potassium hydroxide solution.\1\
                                    Sodium acetate, Glycol, Water
                                     mixture (containing 1% or less
                                     Sodium hydroxide) (if non-flammable
                                     or non-combustible).
                                    Sodium acetate, Glycol, Water
                                     mixture (containing Sodium
                                     hydroxide).
                                    Sodium aluminate solution
                                    Sodium aluminate solution (45% or
                                     less).
                                    Sodium borohydride (15% or less)/
                                     Sodium hydroxide solution.
                                    Sodium carbonate solutions.
                                    Sodium cyanide solution
                                    Sodium hydrosulfide (alternately
                                     hydrosulphide) solution (45% or
                                     less).\1\
                                    Sodium hydrosulfide (alternately
                                     hydrosulphide)/Ammonium sulfide
                                     (alternately sulphide) solution.\1\
                                    Sodium hypochlorite solution (15% or
                                     less).
                                    Sodium hypochlorite solution (20% or
                                     less).
                                    Sodium 2-mercaptobenzothiazol
                                     solution
                                    Sodium nitrite solution
                                    Triphenylborane (10% or less)/
                                     Caustic soda solution.
                                    Trisodium phosphate solution
                                    Vanillin black liquor (free alkali
                                     content 3% or more).
6. Ammonia........................  Ammonia, anhydrous
                                    Ammonium hydroxide (28% or less
                                     Ammonia)
                                    Urea/Ammonium nitrate solution
                                     (containing 1% or more Ammonia).
7. Aliphatic Amines...............  Alkyl amine (C17+).
                                    Alkyl (C12+) dimethylamine.
                                    N-Aminoethylpiperazine
                                    Butylamine (all isomers).
                                    Crude piperazine.
                                    Cyclohexylamine
                                    Dibutylamine
                                    Diethylamine.\1\
                                    Diethylenetriamine.\1\
                                    Diisobutylamine
                                    Diisopropylamine
                                    Dimethylamine
                                    Dimethylamine solution (45% or less)
                                    Dimethylamine solution (greater than
                                     45% but not greater than 55%)
                                    Dimethylamine solution (greater than
                                     55% but not greater than 65%)
                                    N,N-Dimethylcyclohexylamine
                                    N,N-Dimethyldodecylamine
                                    Di-n-propylamine.
                                    Dodecylamine/Tetradecylamine
                                     mixture.
                                    Dodecyldimethylamine/
                                     Tetradecyldimethylamine mixture.
                                    Ethoxylated tallow alkyl amine.
                                    Ethoxylated tallow alkyl amine,
                                     glycol mixture.
                                    Ethoxylated tallow amine (95%).
                                    Ethylamine.\1\
                                    Ethylamine solution (72% or less).
                                    N-Ethylbutylamine.
                                    N-Ethylcyclohexylamine.
                                    Ethyleneamine EA 1302.\1\
                                    Ethylenediamine.\1\
                                    2-Ethylhexylamine.
                                    N-Ethylmethylallylamine.
                                    Glycine, sodium salt solution.
                                    Glyphosate solution (not containing
                                     surfactant).
                                    Hexamethylenediamine (molten).
                                    Hexamethylenediamine solution.
                                    Hexamethylenimine.
                                    Hexamethylenetetramine solutions.
                                    bis-(Hydrogenated tallow alkyl)
                                     methyl amines.
                                    Isophoronediamine.
                                    Isopropylamine
                                    Isopropylamine (70% or less)
                                     solution.
                                    Long-chain alkyl amine.
                                    Long-chain polyetheramine in alkyl
                                     (C2-C4) benzenes.
                                    Metam sodium solution
                                    Methylamine solutions (42% or less).
                                    2-Methyl-1,5-pentanediamine.
                                    Monoethylamine.
                                    Morpholine.\1\
                                    Oleylamine
                                    Pentaethylenehexamine

[[Page 123]]

 
                                    Pentaethylenehexamine/
                                     Tetraethylenepentamine mixture.
                                    Phosphate esters, alkyl (C12-C14)
                                     amine.
                                    Piperazine (70% or less).
                                    Piperazine (crude).
                                    Piperazine, 68% solution.
                                    Polyalkenyl succinic anhydride
                                     amine.
                                    Polyethylene polyamines.\1\
                                    Polyethylene polyamines (more than
                                     50% C5-C20 Paraffin oil).
                                    Poly(iminoethylene)-graft-N-poly
                                     (ethyleneoxy) solution (90% or
                                     less)
                                    (Polyisobutene) amino products in
                                     aliphatic hydrocarbons.
                                    Polyisobutenamine in aliphatic (C10-
                                     C14) solvent
                                    Polyolefin amide alkeneamine/
                                     Molybdenum oxysulfide (alternately
                                     oxysulphide) mixture.
                                    Polyolefin amine (C17+).
                                    Polyoxypropylenediamine (molecular
                                     weight 2000).
                                    n-Propylamine.
                                    iso-Propylamine solution.
                                    Poly olefin amine
                                    Sodium N-methyl dithio carbamate
                                     solution.
                                    Sulfohydrocarbon (alternately
                                     Sulphohydrocarbon), long-chain
                                     (C18+) alkylamine mixture.
                                    Tetraethylenepentamine.\1\
                                    Triethylamine
                                    Triethylenetetramine.\1\
                                    Trimethylamine solution (30% or
                                     less).
                                    Trimethylhexamethylenediamine (2,2,4-
                                      and 2,4,4-).
8. Alkanolamines..................  Alkyl (C12-C16) propoxyamine
                                     ethoxylates.
                                    2-(2-Aminoethoxy)ethanol
                                    Aminoethyldiethanolamine/
                                     Aminoethylethanolamine solution.
                                    Aminoethylethanolamine
                                    2-Amino-2-methyl-1-propanol
                                    Diethanolamine
                                    Diethylaminoethanol.
                                    Diisopropanolamine.
                                    Dimethylethanolamine.\1\
                                    Ethanolamine
                                    Ethoxylated alkyloxy alkyl amine
                                    Ethoxylated long-chain (C16+)
                                     alkyloxyalkanamine.
                                    Isopropanolamine
                                    Isopropanolamine solution.
                                    Linear alkyl (C12-C16) propoxyamine
                                     ethoxylates.
                                    Methyl diethanolamine
                                    Monoethanolamine.
                                    Monoisopropanolamine.
                                    n-Propanolamine.
                                    Triethanolamine.
                                    Triisopropanolamine.
9. Aromatic Amines................  Alkyl (C8-C9) phenylamine in
                                     aromatic solvents
                                    Amine C-6, morpholine process
                                     residue
                                    Aniline
                                    Calcium long chain alkyl phenolic
                                     amine (C8-C40)
                                    4-Chloro-2-methylphenoxyacetic acid,
                                     Dimethylamine salt solution
                                    Dialkyl (C8-C9) diphenylamines
                                    2,6-Diethylaniline.
                                    2,6-Dimethylaniline.
                                    Diphenylamine (molten).
                                    Diphenylamine, reaction product with
                                     2,2,4-trimethylpentene
                                    Diphenylamines, alkylated
                                    2-Ethyl-6-methyl-N-(1[min]-methyl-2-
                                     methoxyethyl)aniline
                                    N-Methylaniline
                                    2-Methyl-6-ethyl aniline
                                    2-Methyl-5-ethylpyridine.
                                    Methylpyridine.
                                    2-Methylpyridine
                                    3-Methylpyridine.
                                    4-Methylpyridine.
                                    N-Methyl-2-pyrrolidone.\1\
                                    Paraldehyde-Ammonia reaction product
                                    Polyolefin phenolic amine (C28-C250)
                                    Pyridine
                                    Pyridine bases
                                    Toluenediamine
                                    o-Toluidine.
10. Amides........................  Acetochlor
                                    Acrylamide solution (50% or less)
                                    Alkenyl (C11+) amide.

[[Page 124]]

 
                                    N,N-Dimethylacetamide
                                    N,N-Dimethylacetamide solution
                                    N,N-Dimethylacetamide solution (40%
                                     or less)
                                    Dimethylformamide
                                    Formamide
                                    N,N-bis(2-Hydroxyethyl) oleamide.
                                    Octadecenoamide solution.
                                    Oleamide solution.
                                    Organomolybdenum amide.
                                    Polybutenyl succinimide
                                    Polyisobutenyl succinimide.
                                    Sulfurized (alternately Sulphurized)
                                     polyolefinamide.
                                    Zinc alkenyl carboxamide
11. Organic Anhydrides............  Acetic anhydride.
                                    Alkenyl (C16-C20) succinic
                                     anhydride.
                                    Alkyl succinic anhydride.
                                    Maleic anhydride.
                                    Maleic anhydride/sodium
                                     allylsulphonate copolymer solution.
                                    Phthalic anhydride (molten).
                                    Polyisobutenyl anhydride adduct
                                    Polyisobutylene succinic anhydride
                                    Polyolefin anhydride
                                    Propionic anhydride
12. Isocyanates...................  Diphenylmethane diisocyanate
                                    Hexamethylene diisocyanate
                                    Isophorone diisocyanate
                                    Polymethylene polyphenyl isocyanate
                                    Toluene diisocyanate
                                    Trimethylhexamethylene diisocyanate
                                     (2,2,4- and 2,4,4-)
13. Vinyl Acetates................  Vinyl acetate
                                    Vinyl ethyl ether
                                    Vinyl neodecanate
                                    Vinyltoluene.
14. Acrylates.....................  Butyl acrylate (all isomers).
                                    Butyl methacrylate.
                                    Butyl/Decyl/Cetyl/Eicosyl
                                     methacrylate mixture.
                                    Cetyl/Eicosyl methacrylate mixture.
                                    Decyl acrylate
                                    Dodecyl methacrylate
                                    Dodecyl/Octadecyl methacrylate
                                     mixture.
                                    Dodecyl/Pentadecyl methacrylate
                                     mixture.
                                    Ethyl acrylate
                                    2-Ethylhexyl acrylate
                                    Ethyl methacrylate
                                    2-Hydroxyethyl acrylate.\1\
                                    Isobutyl methacrylate
                                    Methacrylic resin in ethylene
                                     dichloride.
                                    Methyl acrylate
                                    Methyl methacrylate.
                                    Nonyl methacrylate monomer.
                                    Polyalkyl acrylate.
                                    Polyalkyl(C18-C22) acrylate in
                                     Xylene.
                                    Polyalkyl (C10-C20) methacrylate.
                                    Polyalkyl methacrylate in mineral
                                     oil.
                                    Polyalkyl (C10-C18) methacrylate/
                                     Ethylene-propylene copolymer
                                     mixture.
15. Substituted Allyls............  Acrylonitrile.\1\
                                    Allyl chloride.
                                    Dichloropropene (all isomers).
                                    1,3-Dichloropropene.
                                    Dichloropropene/Dichloropropane
                                     mixtures.
                                    Methacrylonitrile
16. Alkylene Oxides...............  Brominated Epoxy Resin in Acetone.
                                    1,2-Butylene oxide.
                                    Diglycidyl ether of Bisphenol A.
                                    Diglycidyl ether of Bisphenol F.
                                    Epoxy resin.
                                    Ethylene oxide/Propylene oxide
                                     mixture.
                                    Ethylene oxide/Propylene oxide
                                     mixture with an Ethylene oxide
                                     content not more than 30% by mass)
                                    Propylene oxide
17. Epichlorohydrins..............  Chlorohydrins.
                                    Epichlorohydrin
18. Ketones.......................  Acetone.\1\
                                    Acetophenone.

[[Page 125]]

 
                                    Butyl heptyl ketone.
                                    Camphor oil (light).
                                    1-(4-Chlorophenyl)-4,4-dimethyl
                                     pentan-3-one.\1\
                                    Cyclohexanone
                                    Cyclohexanone/Cyclohexanol mixtures.
                                    Diisobutyl ketone
                                    Ethyl amyl ketone.
                                    Isophorone.
                                    Ketone residue.
                                    Mesityl oxide.\1\
                                    Methyl amyl ketone.
                                    Methyl butyl ketone.
                                    Methyl ethyl ketone.\1\
                                    Methyl heptyl ketone.
                                    Methyl isoamyl ketone.
                                    Methyl isobutyl ketone.\1\
                                    Methyl propyl ketone.
                                    beta-Propriolactone
19. Aldehydes.....................  Acetaldehyde
                                    Acrolein.\1\
                                    Butyraldehyde (all isomers)
                                    Crotonaldehyde.\1\
                                    Crude isononylaldehyde.
                                    Decaldehyde.
                                    n-Decaldehyde.
                                    2-Ethyl-3-propylacrolein.\1\
                                    Formaldehyde (50% or more)/Methanol
                                     mixtures.\1\
                                    Formaldehyde solutions (37%-50%).\1\
                                    Formaldehyde solutions (45% or
                                     less).\1\
                                    Furfural.
                                    Glutaraldehyde solutions (50% or
                                     less).
                                    Glyoxal solution (40% or less).
                                    Isodecaldehyde.
                                    Isononylaldehyde (crude).
                                    3-Methyl butyraldehyde.
                                    Methylolureas
                                    3-(Methylthio)propionaldehyde
                                    Octyl aldehyde
                                    Paraldehyde
                                    Pentyl aldehyde
                                    Propionaldehyde.
                                    Valeraldehyde (all isomers).
20. Alcohols, Glycols.............  Acrylonitrile-Styrene copolymer
                                     dispersion in Polyether polyol.
                                    Alcoholic beverages
                                    Alcohol (C9-C11) poly (2.5-9)
                                     ethoxylates.
                                    Alcohol (C6-C17) (secondary) poly (3-
                                     6) ethoxylates.
                                    Alcohol (C6-C17) (secondary) poly (7-
                                     12) ethoxylates.
                                    Alcohol (C12-C16) poly (1-6)
                                     ethoxylates.
                                    Alcohol (C12-C16) poly (7-19)
                                     ethoxylates.
                                    Alcohol (C12-C16) poly (20+)
                                     ethoxylates.
                                    Alcohol polyethoxylates
                                    Alcohol polyethoxylates, secondary.
                                    Alcoholic beverages, n.o.s.
                                    Alcohols (C12+), primary, linear.
                                    Alcohols (C8-C11), primary, linear
                                     and essentially linear.
                                    Alcohols (C12-C13), primary, linear
                                     and essentially linear.
                                    Alcohols (C14-C18), primary, linear
                                     and essentially linear.
                                    Alcohols (C13+):
                                     Cetyl Alcohol (Hexadecanol).
                                     Oleyl Alcohol (Octadecenol).
                                     Pentadecanol.
                                     Tallow alcohol.
                                     Tetradecanol.
                                     Tridecanol.
                                    Amyl alcohol, primary.
                                    n-Amyl alcohol.
                                    sec-Amyl alcohol.
                                    tert-Amyl alcohol.
                                    Behenyl alcohol
                                    Bio-fuel blends of Gasoline and
                                     Ethyl alcohol (25% but
                                     <99% by volume).
                                    Brake fluid base mix: Poly(2-
                                     8)alkylene (C2-C3) glycols/
                                     Polyalkylene (C2-C10) glycols
                                     monoalkyl (C1-C4) ethers and their
                                     borate esters.
                                    2-Butoxyethanol (58%)/Hyperbranched
                                     polyesteramide (42%) (mixture).
                                    Butyl alcohol (all isomers).\1\

[[Page 126]]

 
                                    n-Butyl alcohol
                                    Butylene glycol.
                                    Choline chloride solutions.
                                    Crude Isopropanol.
                                    Cyclohexanol.
                                    Decyl alcohol (all isomers).\1\
                                    Decyl/Dodecyl/Tetradecyl alcohol
                                     mixture.
                                    Diacetone alcohol.\1\
                                    2,2-Dimethylpropane-1,3-diol (molten
                                     or solution).
                                    tert-Dodecanethiol.\1\
                                    Dodecyl alcohol (all isomers).
                                    Ethoxylated alcohols, C11-C15
                                    Ethyl alcohol.\1\
                                    Ethyl butanol
                                    Ethylene chlorohydrin
                                    Ethylene cyanohydrin
                                    Ethylene glycol.\1\
                                    Furfuryl alcohol.\1\
                                    Glycerine.\1\
                                    Glycerine (83%)/Dioxanedimethanol
                                     (17%) mixture.
                                    Glycerol.
                                    Glycerol monooleate.
                                    Glycol mixture, crude.
                                    Heptanol (all isomers).
                                    Hexadecanol (Cetyl alcohol).
                                    Hexamethylene glycol.
                                    Hexanol
                                    Hexylene glycol.
                                    Isoamyl alcohol.
                                    Isobutyl alcohol.
                                    Isopropyl alcohol.
                                    Methacrylic acid--Alkyloxypoly
                                     (alkylene oxide) methacrylate
                                     copolymer, sodium salt aqueous
                                     solution (45% or less).
                                    3-Methoxy-1-butanol.
                                    Methyl alcohol.\1\
                                    Methyl amyl alcohol
                                    alpha-Methylbenzyl alcohol with
                                     Acetophenone (15% or less).
                                    Methyl butanol.
                                    Methyl butenol.
                                    Methyl 3- (3,5 di-tert-butyl-4-
                                     hydroxyphenyl) propionate crude
                                     melt.
                                    Methylbutynol.
                                    Methylcyclohexanemethanol (crude).
                                    2-Methyl-2-hydroxy-3-butyne.
                                    Methyl isobutyl carbinol
                                    3-Methyl-3-methoxybutanol
                                    2-Methyl-1,3-propanediol
                                    Molasses.
                                    Nonyl alcohol (all isomers).\1\
                                    1-Octadecanol.
                                    Octadecenol (oleyl alcohol).
                                    Octanol (all isomers).\1\
                                    Octyl alcohol.\1\
                                    Pentacosa(oxypropane-2,3-diyl)s.
                                    Polyalkylene oxide polyol.
                                    Polybutadiene, hydroxyl terminated.
                                    Polyglycerine/Sodium salts solution
                                     (containing less than 3% Sodium
                                     hydroxide).\1\
                                    Polyglycerol.
                                    Polyolefin amide alkeneamine polyol.
                                    n-Propyl alcohol.\1\
                                    Propylene glycol.\1\
                                    Sorbitol solution.
                                    Stearyl alcohol.
                                    Tallow alcohol.
                                    Tallow fatty alcohol (C13+).
                                    Trimethyl nonanol.
                                    Trimethylol propane polyethoxylated.
                                    Undecanol
                                    Undecyl alcohol
                                    Wine.
21. Phenols, Cresols..............  Alkyl (C4-C9) phenols.
                                    Alkylated (C4-C9) hindered phenols.
                                    Benzyl alcohol
                                    Carbolic oil
                                    Creosote.\1\

[[Page 127]]

 
                                    Creosote (coal tar).
                                    Creosote (wood tar).
                                    Cresols (all isomers).
                                    Cresols with 5% or more phenol.
                                    Cresols with less than 5% phenol.
                                    Cresylic acid.
                                    Cresylic acid dephenolized
                                    Cresylic acid tar.
                                    Cresylic acid with 5% or more
                                     phenol.
                                    Dibutylphenols
                                    2,4-Dichlorophenols.
                                    Di-tert-butylphenol.
                                    2,4-Di-tert-butylphenol.
                                    2,6-Di-tert-butylphenol.
                                    2,4-Dichlorophenol.
                                    Dodecyl phenol.
                                    o-Ethyl phenol.
                                    Long-chain alkylphenate/Phenol
                                     sulfide (alternately sulphide)
                                     mixture.
                                    Methylene bridged isobutylenated
                                     phenols.
                                    Nonylphenol.
                                    Nonylphenol (48-62%)/Phenol (42-48%)/
                                     Dinonylphenol (1-10%) mixture.
                                    Octyl phenol
                                    Phenol
                                    Tertiary butylphenols.
                                    Xylenols
22. Caprolactam Solutions.........  epsilon-Caprolactam (molten or
                                     aqueous solutions)
23-29. Unassigned.................
30. Olefins.......................  Acrylic acid/ethenesulfonic
                                     (alternately ethenesulphonic) acid
                                     copolymer with phosphonate groups,
                                     sodium salt solution.
                                    Aryl polyolefin (C11-C50).
                                    Butadiene (all isomers).
                                    Butadiene/Butylene mixtures
                                     (containing Acetylenes).
                                    Butene oligomer.
                                    Butylenes (all isomers).
                                    1,5,9-Cyclododecatriene.
                                    Cyclopentadiene/Styrene/Benzene
                                     mixture.
                                    1,3-Cyclopentadiene dimer (molten).
                                    Cyclopentene.
                                    Decene.
                                    Dicyclopentadiene, Resin Grade, 81-
                                     89%.
                                    Diisobutylene
                                    Dipentene
                                    Dodecene (all isomers).
                                    Ethylene.
                                    Ethylidene norbornene.\1\
                                    Heptene (all isomers).
                                    Hexene (all isomers).
                                    Isoprene (all isomers).
                                    Isoprene (part refined).
                                    Isoprene concentrate (Shell).
                                    Latex ammonia (1% or less)-
                                     inhibited.
                                    d-Limonene.
                                    Methyl acetylene/Propadiene mixture.
                                    Methyl butenes.
                                    Methylcyclopentadiene dimer.
                                    2-Methyl-1-pentene.
                                    4-Methyl-1-pentene.
                                    alpha-Methylstyrene.
                                    Mixed C4 Cargoes.
                                    Myrcene.
                                    Nonene (all isomers).
                                    1-Octadecene.
                                    Octene (all isomers).
                                    Olefin-Alkyl ester copolymer
                                     (molecular weight 2000+).
                                    Olefin mixture (C7-C9) C8 rich,
                                     stabilized.
                                    Olefin mixtures (C5-C7)
                                    Olefin mixtures (C5-C15)
                                    Olefins (C13+, all isomers).
                                    alpha-Olefins (C6-C18) mixtures.
                                    1,3-Pentadiene.
                                    1,3-Pentadiene (greater than 50%),
                                     Cyclopentene and isomers, mixtures.
                                    Pentene (all isomers).
                                    Pentene
                                    alpha-Pinene

[[Page 128]]

 
                                    beta-Pinene.
                                    Piperylene concentrate.
                                    Poly(4+)isobutylene (molecular
                                     weight 224).
                                    Polyisobutylene (molecular weight
                                     <=224).
                                    Polyolefin in mineral oil.
                                    Poly(5+)propylene.
                                    Propylene.
                                    Propylene-butylene copolymer
                                    Propylene dimer.
                                    Propylene tetramer.
                                    Propylene trimer.
                                    Propylene/Propane/MAPP gas mixture.
                                    Styrene monomer.
                                    Tetradecene
                                    Tridecene
                                    Triisobutylene
                                    Tripropylene
                                    Turpentine
                                    Undecene.
                                    1-Undecene.
31. Paraffins.....................  Alkanes (C10-C26) linear and
                                     branched (flash point 60
                                     [deg]C).
                                    Alkanes (C10-C26) linear and
                                     branched (flash point <=60 [deg]C).
                                    Alkanes (C6-C9).
                                    n-Alkanes (C9-C11).
                                    n-Alkanes (C10+) (all isomers).
                                    iso- & cyclo-Alkanes (C10-C11).
                                    iso- & cyclo-Alkanes (C12+).
                                    Butane (all isomers).
                                    Butane/Propane mixture.
                                    Cycloheptane
                                    Cyclohexane
                                    Cyclopentane.
                                    Ethane.
                                    Ethyl cyclohexane
                                    Ethylene-Propylene copolymer (in
                                     liquid mixtures).
                                    Heptadecane (all isomers).
                                    Isopropylcyclohexane.
                                    Methane.
                                    Methylcyclohexane
                                    2-Methyl pentane.
                                    Nonane (all isomers).
                                    Octane (all isomers).
                                    Paraffin wax.
                                    Pentane (all isomers).
                                    Polyalpha olefins.
                                    Propane.
                                    Waxes: Paraffin.
32. Aromatic Hydrocarbons Mixures.  Alkyl acrylate-Vinyl pyridine
                                     copolymer in Toluene.
                                    Alkyl (C3-C4) benzenes:
                                     Butylbenzenes.
                                     Cumene.
                                     Propylbenzenes.
                                    Alkyl (C5-C8) benzenes:
                                     Amylbenzenes.
                                     Heptylbenzenes.
                                     Hexylbenzenes.
                                     Octylbenzenes.
                                    Alkyl (C9+) benzenes:
                                     Decylbenzenes.
                                     Dodecylbenzenes.
                                     Nonylbezenes.
                                     Tetradecylbenzenes.
                                     Tetrapropylbenzenes.
                                     Tridecylbenzenes.
                                     Undecylbenzenes.
                                    Alkylbenzene mixtures (containing at
                                     least 50% of Toluene).
                                    Alkylbenzene, Alkylindane,
                                     Alkylindene mixture (each C12-C17).
                                    Alkyl toluene.
                                    Alkyl (C18+) toluenes.
                                    Benzene.
                                    Benzene and mixtures having 10%
                                     Benzene or more.
                                    Benzene hydrocarbon mixtures
                                     (containing Acetylenes) (having 10%
                                     Benzene or more).
                                    Benzene/Toluene/Xylene mixtures
                                     (having 10% Benzene or more).

[[Page 129]]

 
                                    Butyl phenol, Formaldehyde resin in
                                     Xylene
                                    Butyl toluene.
                                    C9 Resinfeed (DSM).\1\
                                    p-Cymene.
                                    Detergent alkylate.
                                    Diethylbenzene.
                                    Diisopropylbenzene (all isomers)
                                    Diisopropylnaphthalene.
                                    Diphenyl.
                                    Dodecyl xylene.
                                    Ethylbenzene
                                    Ethyl toluene.
                                    1-Hexadecylnaphthalene/1,4-bis
                                     (Hexadecyl) naphthalene mixture.
                                    1,n-Hexadecylnaphthalene (90%)/1,4-
                                     Di-n-(Hexadecyl) naphthalene (10%).
                                    Hexylbenzenes.
                                    Methyl naphthalene (molten).
                                    Naphthalene (molten).
                                    Naphthalene still residue.
                                    Parachlorobenzotrifluoride.
                                    1-Phenyl-1-xylyl ethane.
                                    Poly(2+) cyclic aromatics.
                                    Polyolefinamine in alkyl (C2-C4)
                                     benzenes.
                                    Polyolefinamine in aromatic solvent.
                                    Pyrolysis gasoline (containing
                                     Benzene).
                                    Tetrahydronaphthalene.
                                    Tetramethylbenzene (all isomers).
                                    C9 Resinfeed (DSM) \2\
                                    1,2,3,5-Tetramethylbenzene.
                                    Toluene.
                                    Tridecylbenzene
                                    Triethylbenzene.
                                    Trimethylbenzene (all isomers).
                                    Xylenes.
                                    Xylenes/Ethylbenzene (10% or more)
                                     mixture.
33. Miscellaneous Hydrocarbon        Alachlor technical (90% or more).
 Mixtures.
                                    Alkylbenzene sulfonic (alternately
                                     sulphonic) acid, sodium salt
                                     solution.
                                    Alkyl dithiothiadiazole (C6-C24).
                                    Alkyl (C18-C28) toluenesulfonic
                                     (alternately toluenesulphonic)
                                     acid, Calcium salts, high overbase.
                                    Alkyl (C18-C28) toluenesulfonic
                                     (alternately toluenesulphonic)
                                     acid, Calcium salts, low overbase.
                                    Asphalt.
                                    Asphalt blending stocks, roofers
                                     flux.
                                    Asphalt blending stocks, straight
                                     run residue
                                    Asphalt emulsion
                                    Asphalt, kerosene, and other
                                     components
                                    Aviation alkylates (C8 paraffins and
                                     isoparaffins BPT 95 to 120 [deg]C).
                                    Bio-fuel blends of Diesel/gas oil
                                     and Alkanes (C10-C26), linear and
                                     branched with a flash point 60 [deg]C (25% but
                                     <99% by volume)
                                    Bio-fuel blends of Diesel/gas oil
                                     and Alkanes (C10-C26), linear and
                                     branched with a flash point <=60
                                     [deg]C (25% but <99% by
                                     volume).
                                    Calcium sulfonate (alternately
                                     sulphonate)/Calcium carbonate/
                                     Hydrocarbon solvent mixture.
                                    Coal tar.
                                    Coal tar crude bases.
                                    Coal tar distillate.
                                    Coal tar pitch (molten).
                                    Coal tar, high temperature.
                                    Decahydronaphthalene.
                                    Diphenyl/Diphenyl ether mixture.
                                    Distillates, flashed feed stocks.
                                    Distillates, straight run
                                    Drilling mud (low toxicity) (if
                                     flammable or combustible).
                                    Gas oil, cracked
                                    Gasoline blending stock, alkylates
                                    Gasoline blending stock, reformates
                                    Gasolines:
                                     Automotive (containing not over
                                     4.23 grams lead per gal.).
                                     Aviation (containing not over 4.86
                                     grams lead per gal.).
                                     Casinghead (natural).
                                     Polymer.
                                     Straight run.
                                    Jet Fuels:
                                     JP-4.

[[Page 130]]

 
                                     JP-5.
                                     JP-8.
                                    Kerosene.
                                    Mineral spirits.
                                    Naphtha:
                                     Aromatic.
                                     Coal tar solvent.
                                     Heavy.
                                     Paraffinic.
                                     Petroleum.
                                     Solvent.
                                     Stoddard solvent.
                                     Varnish Makers' and Painters'.
                                    Oil, fuel:
                                     No. 1.
                                     No. 1-D.
                                     No. 2.
                                     No. 2-D.
                                     No. 4.
                                     No. 5.
                                     No. 6.
                                    Oil, misc.:
                                     Aliphatic.
                                     Aromatic.
                                     Clarified.
                                     Coal.
                                     Crude.
                                     Diesel.
                                     Gas, cracked.
                                     Gas, high pour.
                                     Gas, low pour.
                                     Gas, low sulfur (alternately
                                     sulphur).
                                     Heartcut distillate.
                                     Lubricating.
                                     Mineral.
                                     Mineral seal.
                                     Motor.
                                     Neatsfoot.
                                     Penetrating.
                                     Pine.
                                     Residual.
                                     Road.
                                     Rosin.
                                     Spindle.
                                     Transformer.
                                     Turbine.
                                     Vacuum gas oil.
                                    Oxyalkylated alkyl phenol
                                     formaldehyde.
                                    Petrolatum.
                                    Petroleum wax.
                                    Polybutene.
                                    Polyolefin (molecular weight 300+).
                                    Polyolefin amide alkeneamine (C17+).
                                    Polyolefin amide alkeneamine (C28+).
                                    Polyolefin amide alkeneamine borate
                                     (C28-C250)
                                    Polyolefin amide alkeneamine in
                                     mineral oil.
                                    Polyolefinamine (C28-C250).
                                    Sulfohydrocarbon (alternately
                                     Sulphohydrocarbon) (C3-C88).
                                    Sulfurized (alternately Sulphurized)
                                     fat (C14-C20).
                                    Sulfurized (alternately Sulphurized)
                                     polyolefinamide alkene (C28-C250)
                                     amine.
                                    Waxes: Petroleum.
                                    White spirit.
                                    White spirit (low (15-20%)
                                     aromatic).
34. Esters........................  Alkenyl (C8+) amine, Alkenyl (C12+)
                                     acid ester mixture.
                                    Alkyl dithiocarbamate (C19-C35).
                                    Alkyl ester copolymer (C4-C20).
                                    Alkyl ester copolymer in mineral
                                     oil.
                                    Alkyl (C7-C9) nitrates.\1\
                                    Alkyl (C8-C40) phenol sulfide
                                     (alternately sulphide).
                                    Alkyl (C10-C20), (saturated and
                                     unsaturated) phosphite.
                                    Alkyl sulfonic (alternately
                                     sulphonic) acid ester of phenol.
                                    Alkyl (C18-C28) toluenesulfonic
                                     (alternately toluenesulphonic)
                                     acid, Calcium salts, borated.
                                    Alkylaryl phosphate mixtures (more
                                     than 40% Diphenyl tolyl phosphate,
                                     less than 0.02% ortho-isomer).

[[Page 131]]

 
                                    Amyl acetate (all isomers).
                                    Amyl acid phosphate.
                                    Animal and Fish oils, n.o.s.:
                                     Cod liver oil.
                                     Lanolin.
                                     Neatsfoot oil.
                                     Pilchard oil.
                                     Sperm oil.
                                    Animal and Fish acid oils and
                                     distillates, n.o.s.:
                                     Animal acid oil.
                                     Fish acid oil.
                                     Lard acid oil.
                                     Mixed acid oil.
                                     Mixed general acid oil.
                                     Mixed hard acid oil.
                                     Mixed soft acid oil.
                                    Barium long-chain (C11-C50) alkaryl
                                     sulfonate (alternately sulphonate).
                                    Barium long-chain alkyl (C8-C14)
                                     phenate sulfide (alternately
                                     sulphide).
                                    Benzenetricarboxylic acid trioctyl
                                     ester.
                                    Benzyl acetate
                                    Bio-fuel blends of Diesel/gas oil
                                     and FAME (25% but <99%
                                     by volume)
                                    Bio-fuel blends of Diesel/gas oil
                                     and vegetable oil (25%
                                     but <99% by volume)
                                    Boronated calcium sulfonate
                                    Bis (2-ethylhexyl) terephthalate.
                                    Boronated calcium sulfonate
                                     (alternately sulphonate).
                                    Butyl acetate (all isomers)
                                    Butyl benzyl phthalate
                                    Butyl butyrate (all isomers).
                                    n-Butyl formate.
                                    n-Butyl propionate.
                                    Butyl stearate
                                    Calcium alkyl (C10-C28) salicylate.
                                    Calcium alkyl (C9) phenol sulfide
                                     (alternately sulphide), polyolefin
                                     phosphorosulfide (alternately
                                     phosphorosulphide) mixture.
                                    Calcium carbonate slurry.
                                    Calcium long-chain alkaryl sulfonate
                                     (alternately sulphonate) (C11-C50).
                                    Calcium long-chain alkyl (C5-C10)
                                     phenate.
                                    Calcium long-chain alkyl (C5-C20)
                                     phenate.
                                    Calcium long-chain alkyl (C11-C40)
                                     phenate.
                                    Calcium long-chain alkyl phenate
                                     sulfide (alternately sulphide) (C8-
                                     C40).
                                    Calcium long chain alkyl salicylate
                                     (C13 + )
                                    Calcium long-chain alkyl (C18-C28)
                                     salicylate.
                                    Calcium nitrate solutions (50% or
                                     less).
                                    Calcium nitrate/Magnesium nitrate/
                                     Potassium chloride solution.
                                    Calcium salts of fatty acids.
                                    Calcium stearate.
                                    Cobalt naphthenate in solvent
                                     naphtha.
                                    Copper salt of long-chain (C17+)
                                     alkanoic acid.
                                    Copper salt of long-chain (C3-C16)
                                     fatty acid.
                                    Cyclohexyl acetate.
                                    Decyl acetate.
                                    Dialkyl (C7-C13) phthalates:
                                     Di-(2-ethylhexyl) phthalate.
                                     Diheptyl phthalate.
                                     Dihexyl phthalate.
                                     Diisooctyl phthalate.
                                     Dioctyl phthalate.
                                     Diisodecyl phthalate.
                                     Diisononyl phthalate.
                                     Dinonyl phthalate.
                                     Ditridecyl phthalate.
                                     Diundecyl phthalate.
                                    Dialkyl thiophosphates sodium salts
                                     solution.
                                    Dibutyl hydrogen phosphonate
                                    Dibutyl phthalate
                                    Dibutyl terephthalate.
                                    Di-(2-ethylhexyl) adipate.
                                    Di-(2-ethylhexyl) terephthalate.
                                    Diethylene glycol dibenzoate.
                                    Diethylene glycol phthalate.
                                    Diethyl phthalate.
                                    Diethyl sulfate (alternately
                                     sulphate).
                                    Di-n-hexyl adipate
                                    Diisobutyl phthalate

[[Page 132]]

 
                                    Dimethyl adipate
                                    Dimethylcyclicsiloxane hydrolyzate
                                    Dimethyl glutarate
                                    Dimethyl hydrogen phosphite.\1\
                                    Dimethyl naphthalene sulfonic
                                     (alternately sulphonic) acid,
                                     sodium salt solution.\1\
                                    Dimethyl phthalate
                                    Dimethylpolysiloxane.
                                    Dimethyl succinate
                                    Dipropylene glycol dibenzoate
                                    Dithiocarbamate ester (C7-C35)
                                    Ditridecyl adipate.
                                    2-Dodecenylsuccinic acid,
                                     dipotassium salt solution.
                                    2-Ethoxyethyl acetate.
                                    Ethyl acetate
                                    Ethyl acetoacetate
                                    Ethyl butyrate
                                    2-Ethyl-2-(2,4-dichlorophenoxy)
                                     acetate
                                    2-Ethyl-2-(2,4-dichlorophenoxy)
                                     propionate
                                    S-Ethyl dipropylthiocarbamate.
                                    Ethylene carbonate.
                                    Ethylene glycol acetate
                                    Ethylene glycol butyl ether acetate
                                    Ethylene glycol diacetate.
                                    Ethylene glycol methyl ether
                                     acetate.
                                    Ethyl-3-ethoxypropionate
                                    Ethyl hexyl phthalate
                                    Ethyl hexyl tallate.
                                    2-Ethyl-2-(hydroxymethyl) propane-
                                     1,3-diol (C8-C10) ester.
                                    Ethyl lactate.
                                    Ethyl propionate.
                                    Fatty acid methyl esters.
                                    Fatty acids (C8-C10).
                                    Fatty acids (C12+).
                                    Fatty acids (saturated, C13+).
                                    Fatty acids (C16+).
                                    Fatty acids, essentially linear (C6-
                                     C18) 2-ethylhexyl ester.
                                    Glyceryl triacetate.
                                    Glycidyl ester of C10 trialkyl
                                     acetic acid.
                                    Glycidyl ester of tertiary
                                     carboxylic acid.
                                    Glycidyl ester of tridecyl acetic
                                     acid.
                                    Glycidyl ester of Versatic acid.
                                    Glycol diacetate.
                                    Glycol triacetate.
                                    Heptyl acetate.
                                    Herbicide (C15-H22-NO2-Cl).
                                    Hexyl acetate.
                                    Hog grease.
                                    Isobutyl formate
                                    Isopropyl acetate
                                    Lauric acid methyl ester/Myristic
                                     acid methyl ester mixture.
                                    Lecithin
                                    Magnesium long-chain alkaryl
                                     sulfonate (alternately sulphonate)
                                     (C11-C50).
                                    Magnesium long-chain alkyl phenate
                                     sulfide (alternately sulphide) (C8-
                                     C20).
                                    Magnesium long-chain alkyl
                                     salicylate (C11+).
                                    Magnesium nonyl phenol sulfide
                                     (alternately sulphide).
                                    Magnesium sulfonate (alternately
                                     sulphonate).
                                    3-Methoxybutyl acetate
                                    1-Methoxy-2-propyl acetate
                                    Methyl acetate
                                    Methyl acetoacetate
                                    Methyl amyl acetate
                                    Methyl butyrate
                                    Methyl formate
                                    3-Methyl-3-methoxybutyl acetate
                                    Methyl salicylate.
                                    N-(2-Methoxy-1-methyl ethyl)-2-ethyl-
                                     6-methyl chloroacetanilide.
                                    Metolachlor.
                                    Naphthalene sulfonic (alternately
                                     sulphonic) acid, sodium salt
                                     solution.
                                    Nitrilotriacetic acid, trisodium
                                     salt solution
                                    Nonyl acetate
                                    Nonyl phenol sulfide (90% or less)
                                     solution.
                                    Octamethylcyclotetrasiloxane
                                    n-Octyl acetate
                                    Octyl decyl adipate

[[Page 133]]

 
                                    Octyl nitrate.
                                    Octyl phthalate.
                                    Oil, edible:
                                     Beechnut.
                                     Castor.
                                     Cocoa butter.
                                     Coconut.
                                     Cod liver.
                                     Corn.
                                     Cotton seed.
                                     Fish.
                                     Grape seed.
                                     Groundnut.
                                     Hazelnut.
                                     Illipe.
                                     Lard.
                                     Maize.
                                     Mango kernel.
                                     Nutmeg butter.
                                     Olive.
                                     Palm.
                                     Palm kernel.
                                     Palm kernel olein.
                                     Palm kernel stearin.
                                     Palm mid fraction.
                                     Palm olein.
                                     Palm stearin.
                                     Peanut.
                                     Poppy.
                                     Poppy seed.
                                     Raisin seed.
                                     Rapeseed.
                                     Rapeseed, (low erucic acid
                                     containing less than 4% free fatty
                                     acids).
                                     Rice bran.
                                     Safflower.
                                     Salad.
                                     Sesame.
                                     Shea butter.
                                     Soyabean.
                                     Sunflower.
                                     Sunflower seed.
                                     Tucum.
                                     Vegetable.
                                     Walnut.
                                    Oil, misc.:
                                     Acid mixture from soyabean, corn
                                     (maize) and sunflower oil refining.
                                     Animal.
                                     Camelina.
                                     Cashew nut shell oil (untreated).
                                     Coconut fatty acid.
                                     Coconut, fatty acid methyl ester.
                                     Cottonseed oil, fatty acid.
                                     Lanolin.
                                     Linseed.
                                     Oiticica.
                                     Palm acid.
                                     Palm fatty acid distillate.
                                     Palm oil, fatty acid methyl ester.
                                     Palm kernel acid.
                                     Palm kernel fatty acid distillate.
                                     Palm, non-edible industrial grade.
                                     Perilla.
                                     Pilchard.
                                     Rapeseed fatty acid methyl esters.
                                     Seal.
                                     Soapstock.
                                     Soyabean (epoxidized).
                                     Soyabean fatty acid methyl ester.
                                     Tall.
                                     Tall, crude.
                                     Tall, distilled.
                                     Tall, fatty acid.
                                     Tall, fatty acid (resin acids less
                                     than 20%).
                                     Tall pitch.

[[Page 134]]

 
                                     Tung.
                                    n-Pentyl propionate.
                                    Phosphate esters
                                    Poly (2-8)alkylene glycol monoalkyl
                                     (C1-C6) ether acetate:
                                    Diethylene glycol butyl ether
                                     acetate.
                                    Diethylene glycol ethyl ether
                                     acetate.
                                    Diethylene glycol methyl ether
                                     acetate.
                                    Polycarboxylic ester (C9+).
                                    Polyferric sulfate (alternately
                                     sulphate) solution.
                                    Polymerized esters.
                                    Polymethylsiloxane.
                                    Polyolefin aminoester salts
                                     (molecular weight 2000+).
                                    Polyolefin ester (C28-C250).
                                    Polyolefin phosphorosulfide
                                     (alternately phosphorosulphide),
                                     barium derivative (C28-C250).
                                    Poly(20)oxyethylene sorbitan
                                     monooleate.
                                    Polysiloxane
                                    Polymethylsiloxane.
                                    Polyolefin aminoester salts
                                     (molecular weight 2000+).
                                    Polyolefin ester (C28-C250).
                                    Polyolefin phosphorosulfide
                                     (alternately phosphorosulphide),
                                     barium derivative (C28-C250).
                                    Poly(20)oxyethylene sorbitan
                                     monooleate.
                                    Polysiloxane/White spirit, low (15-
                                     20%) aromatic.
                                    Potassium formate solutions.
                                    Potassium formate solution (75% or
                                     more)
                                    Potassium oleate.
                                    Potassium salt of polyolefin acid.
                                    n-Propyl acetate.
                                    Propylene carbonate
                                    Propylene glycol methyl ether
                                     acetate.
                                    Shea butter
                                    Siloxanes.
                                    Sodium acetate solution.
                                    Sodium acetate/Glycol/Water mixture
                                     (not containing Sodium hydroxide).
                                    Sodium alkyl (C14-C17) sulfonates
                                     (alternately sulphonates) 60-65%
                                     solution.
                                    Sodium aluminosilicate slurry.
                                    Sodium benzoate.
                                    Sodium bicarbonate solution (less
                                     than 10%).
                                    Sodium dimethyl naphthalene
                                     sulfonate (alternately sulphonate)
                                     solution.\2\
                                    Sodium long-chain alkyl salicylate
                                     (C13+).
                                    Sodium naphthalene sulfonate
                                     (alternately sulphonate) solution.
                                    Sodium petroleum sulfonate
                                     (alternately sulphonate).
                                    Sodium sulfate (alternately
                                     sulphate) solution.
                                    Tall oil soap, crude.
                                    Tallow.
                                    Tallow fatty acid.
                                    Tributyl phosphate
                                    Tricresyl phosphate (containing 1%
                                     or more ortho-isomer)
                                    Tricresyl phosphate (containing less
                                     than 1% ortho-isomer)
                                    Tridecanoic acid
                                    Tridecyl acetate.
                                    Triethylene glycol di-(2-
                                     ethylbutyrate).
                                    Triethylene glycol dibenzoate.
                                    Triethyl phosphate.
                                    Triethyl phosphite.\1\
                                    Triisooctyl trimellitate.\1\
                                    Triisopropylated phenyl phosphates.
                                    Trimethyl phosphite.\1\
                                    2,2,4-Trimethyl-1,3-pentanediol
                                     diisobutyrate.
                                    2,2,4-Trimethyl-3-pentanol-1-
                                     isobutyrate.
                                    Trisodium nitrilotriacetate
                                     solution.
                                    2,2,4-Trimethyl-1,3-pentanediol-1-
                                     isobutyrate
                                    Trixylyl phosphate
                                    Trixylenyl phosphate.
                                    Vegetable acid oils, n.o.s.:
                                     Corn acid oil.
                                     Cottonseed acid oil.
                                     Dark mixed acid oil.
                                     Groundnut acid oil.
                                     Mixed acid oil.
                                     Mixed general acid oil.
                                     Mixed hard acid oil.
                                     Mixed soft acid oil.
                                     Rapeseed acid oil.
                                     Safflower acid oil.

[[Page 135]]

 
                                     Soya acid oil.
                                     Sunflower seed acid oil.
                                    Vegetable fatty acid distillates,
                                     n.o.s.:
                                     Palm kernel fatty acid distillate.
                                     Palm oil fatty acid distillate.
                                     Tall fatty acid distillate.
                                     Tall oil fatty acid distillate.
                                    Vegetable oils, n.o.s.:
                                     Beechnut oil.
                                     Camelina oil.
                                     Cashew nut shell.
                                     Castor oil.
                                     Cocoa butter.
                                     Coconut oil.
                                     Corn oil.
                                     Cotton seed oil.
                                     Croton oil.
                                     Grape seed oil.
                                     Groundnut oil.
                                     Hazelnut oil.
                                     Illipe oil.
                                     Linseed oil.
                                     Mango kernel oil.
                                     Nutmeg butter.
                                     Oiticica oil.
                                     Olive oil.
                                     Palm kernel oil.
                                     Palm kernel olein.
                                     Palm kernel stearin.
                                     Palm mid fraction.
                                     Palm, non-edible industrial grade.
                                     Palm oil.
                                     Palm olein.
                                     Palm stearin.
                                     Peanut oil.
                                     Peel oil (oranges and lemons).
                                     Perilla oil.
                                     Pine oil.
                                     Poppy seed oil.
                                     Poppy oil.
                                     Raisin seed oil.
                                     Rapeseed oil.
                                     Rapeseed (low erucic acid
                                     containing less than 4% free fatty
                                     acids).
                                     Rice bran oil.
                                     Rosin oil.
                                     Safflower oil.
                                     Salad oil.
                                     Sesame oil.
                                     Shea butter.
                                     Soyabean oil.
                                     Sunflower seed oil.
                                     Tall.
                                     Tall, crude.
                                     Tall, distilled.
                                     Tall, pitch.
                                     Tucum oil.
                                     Tung oil.
                                     Walnut oil.
                                    Waxes:
                                     Candelilla.
                                     Carnauba.
                                    Zinc alkaryl dithiophosphate (C7-
                                     C16)
                                    Zinc alkyl dithiophosphate (C3-C14)
35. Vinyl Halides.................  Vinyl chloride
                                    Vinylidene chloride
36. Halogenated Hydrocarbons......  Benzyl chloride
                                    Bromochloromethane
                                    Carbon tetrachloride.\1\
                                    Catoxid feedstock.\1\
                                    Chlorinated paraffins (C10-C13)
                                    Chlorinated paraffins (C14-C17)
                                     (with 50% Chlorine or more, and
                                     less than 1% C13 or shorter chains)
                                    Chlorinated paraffins (C14-C17)
                                     (with 52% Chlorine).
                                    Chlorinated paraffins (C18+) with
                                     any level of Chlorine.

[[Page 136]]

 
                                    Chlorobenzene
                                    Chloroform
                                    m-Chlorotoluene
                                    o-Chlorotoluene
                                    p-Chlorotoluene
                                    Chlorotoluenes (mixed isomers)
                                    Dibromomethane.
                                    Dichlorobenzene (all isomers).
                                    3,4-Dichloro-1-butene.
                                    Dichlorodifluoromethane.
                                    1,1-Dichloroethane
                                    1,6-Dichlorohexane
                                    Dichloromethane
                                    Dichloropropane.
                                    1,1-Dichloropropane.
                                    1,2-Dichloropropane.
                                    1,3-Dichloropropane.
                                    Ethyl chloride
                                    Ethylene dibromide
                                    Ethylene dichloride.\1\
                                    Methyl bromide
                                    Methyl chloride
                                    Methylene chloride.
                                    Monochlorodifluoromethane.
                                    Pentachloroethane.
                                    Perchloroethylene.
                                    n-Propyl chloride.
                                    Sym-trichlorobenzene.
                                    Tetrachloroethane.
                                    1,1,2,2-Tetrachloroethane
                                    1,2,3-Trichlorobenzene (molten)
                                    1,2,4-Trichlorobenzene
                                    1,2,3-Trichlorobenzol.
                                    1,1,1-Trichloroethane.\1\
                                    1,1,2-Trichloroethane
                                    Trichloroethylene.\1\
                                    1,1,2-Trichloro-1,2,2-
                                     trifluoroethane.
                                    1,2,3-Trichloropropane.
37. Nitriles......................  Acetonitrile
                                    Acetonitrile (low purity grade)
                                    Adiponitrile
                                    Lactonitrile solution (80% or less)
                                    2-Methylglutaronitrile
                                    2-Methylglutaronitrile with 2-
                                     Ethylsuccinonitrile (12% or less)
                                    Propionitrile
                                    Tallow alkyl nitrile.
38. Carbon Disulfide (Alternately   Carbon disulfide (alternately
 Disulfide).                         disulphide).
39. Sulfolane (Alternately          Sulfolane (alternately Sulpholane).
 Sulfolane).
40. Glycol Ethers.................  Alkyl (C7-C11) phenol poly(4-12)
                                     ethoxylates.
                                    Alkyl (C9-C15) phenyl propoxylate.
                                    Diethylene glycol butyl ether
                                    Diethylene glycol.\1\
                                    Diethylene glycol dibutyl ether.
                                    Diethylene glycol diethyl ether.
                                    Diethylene glycol ethyl ether
                                    Diethylene glycol methyl ether
                                    Diethylene glycol n-hexyl ethe
                                    Diethylene glycol phenyl ether.r
                                    Diethylene glycol propyl ether
                                    Dipropylene glycol.
                                    Dipropylene glycol butyl ether
                                    Dipropylene glycol methyl ether
                                    2-Ethoxyethanol.
                                    Ethoxy triglycol (crude).
                                    Ethylene glycol dibutyl ether.
                                    Ethylene glycol monoalkyl ethers:
                                     Ethylene glycol butyl ether.
                                     Ethylene glycol tert-butyl ether.
                                     Ethylene glycol ethyl ether.
                                     Ethylene glycol hexyl ether.
                                     Ethylene glycol isopropyl ether.
                                     Ethylene glycol methyl butyl ether.

[[Page 137]]

 
                                     Ethylene glycol methyl ether.
                                     Ethylene glycol propyl ether.
                                     Ethylene glycol n-propyl ether.
                                    Ethylene glycol phenyl ether.
                                    Ethylene glycol phenyl ether/
                                     Diethylene glycol phenyl ether
                                     mixture.
                                    Glucitol/glycerol blend propoxylated
                                     (containing less than 10% amines).
                                    Glycerol, ethoxylated.
                                    Glycerol polyalkoxylate.
                                    Glycerol, propoxylated
                                    Glycerol, propoxylated and
                                     ethoxylated
                                    Glycerol/Sucrose blend propoxylated
                                     and ethoxylated
                                    alpha-Hydro-omega-hydroxytetradeca
                                     (oxytetramethylene)
                                    Methoxy triglycol
                                    Nonyl phenol poly(4+)ethoxylates.
                                    Pentaethylene glycol methyl ether.
                                    Polyalkylene glycols/Polyalkylene
                                     glycol monoalkyl ethers mixtures.
                                    Poly(2-8)alkylene glycol monoalkyl
                                     (C1-C6) ethers:
                                     Diethylene glycol butyl ether.
                                     Diethylene glycol ethyl ether.
                                     Diethylene glycol n-hexyl ether.
                                     Diethylene glycol methyl ether.
                                     Diethylene glycol propyl ether.
                                     Dipropylene glycol butyl ether.
                                     Dipropylene glycol methyl ether.
                                     Polyalkylene glycol butyl ether.
                                     Polyethylene glycol monoalkyl
                                     ether.
                                     Polypropylene glycol methyl ether.
                                     Tetraethylene glycol methyl ether.
                                     Triethylene glycol butyl ether.
                                     Triethylene glycol ethyl ether.
                                     Triethylene glycol methyl ether.
                                     Tripropylene glycol methyl ether.
                                    Polyethylene glycol.
                                    Polyalkylene glycol butyl ether
                                    Polyethylene glycol dimethyl ether
                                    Poly (ethylene glycol) methylbutenyl
                                     ether (molecular weight 1000).
                                    Polypropylene glycol.
                                    Poly (tetramethylene ether) glycols
                                     (molecular weight 950-1050).
                                    Polytetramethylene ether glycol.
                                    Propylene glycol monoalkyl ethers:
                                     n-Propoxypropanol.
                                     Propylene glycol n-butyl ether.
                                     Propylene glycol ethyl ether.
                                     Propylene glycol methyl ether.
                                     Propylene glycol propyl ether.
                                    Propylene glycol phenyl ether.
                                    Tetraethylene glycol.
                                    Triethylene glycol.
                                    Triethylene glycol butyl ether
                                     mixture.
                                    Triethylene glycol ether mixture.
                                    Tripropylene glycol.
41. Ethers........................  Alcohol (C12-C13, branched and
                                     linear) poly (4-8) propoxy sulfates
                                     (alternately sulphates), sodium
                                     salt 25-30% solution.
                                    Alkaryl polyethers (C9-C20).
                                    tert-Amyl methyl ether
                                    n-Butyl ether.
                                    Dichloroethyl ether.
                                    2,2[min]-Dichloroisopropyl ether.
                                    Diethyl ether.
                                    Dimethyl ether.
                                    Dimethyl furan
                                    1,4-Dioxane
                                    Diphenyl ether
                                    Diphenyl ether/Diphenyl phenyl ether
                                     mixture.
                                    Ethyl tert-butyl ether.\1\
                                    Isopropyl ether
                                    Long chain alkaryl polyether (C11-
                                     C20)
                                    Methyl-tert-butyl ether.\1\
                                    Methyl tert-pentyl ether.
                                    Methyl tert-pentyl ether.
                                    Polyether, borated.
                                    Polyether (molecular weight 1350+).
                                    Polyether polyols.
                                    Poly(oxyalkylene) alkenyl ether
                                     (molecular weight 1000).

[[Page 138]]

 
                                    Polyoxybutylene alcohol
                                    Propyl ether
                                    Tetrahydrofuran
                                    1,3,5-Trioxane.
42. Nitrocompounds................  o-Chloronitrobenzene
                                    Dinitrotoluene (molten).
                                    Nitrobenzene.
                                    o-Nitrochlorobenzene.
                                    Nitroethane
                                    Nitroethane/1-Nitropropane (each 15%
                                     or more) mixture.
                                    Nitrophenol (mixed isomers).
                                    Nitropropane (60%)/Nitroethane (40%)
                                     mixtures.
                                    1- or 2-Nitropropane.
                                    Nitropropane, Nitroethane mixtures
                                    o- or p-Nitrotoluenes.
43. Miscellaneous Water Solutions.  Alkyl (C8-C10) polyglucoside
                                     solution (65% or less).
                                    Alkyl (C8-C10)/(C12-C14):(40% or
                                     less/60% or more) polyglucoside
                                     solution (55% or less).
                                    Alkyl (C8-C10)/(C12-C14):(60% or
                                     more/40% or less) polyglucoside
                                     solution (55% or less)
                                    Alkyl (C8-C10) polyglucoside
                                     solution (65% or less)
                                    Alkyl (C8-C10)/(C12-C14):(60% or
                                     more/40% or less) polyglucoside
                                     solution (55% or less).
                                    Alkyl (C12-C14) polyglucoside
                                     solution (55% or less).
                                    Aluminum sulfate (alternately
                                     Aluminium sulphate) solution.\1\
                                    2-Amino-2-hydroxymethyl-1,3-
                                     propanediol solution
                                    Ammonium bisulfite (alternately
                                     bisulphite) solution (70% or
                                     less).\1\
                                    Ammonium chloride solution (less
                                     than 25%).
                                    Ammonium polyphosphate solution
                                    Ammonium sulfate (alternately
                                     sulphate) solution.
                                    Ammonium sulfate (alternately
                                     sulphate) solution (20% or less).
                                    Ammonium thiosulfate (alternately
                                     thiosulphate) solution (60% or
                                     less).
                                    Apple juice.
                                    Caramel solutions
                                    Cesium formate solution.
                                    Clay slurry
                                    Coal slurry
                                    Corn syrup
                                    Dextrose solution
                                    2,4-Dichlorophenoxyacetic acid,
                                     Diethanolamine salt solution
                                    2,4-Dichlorophenoxyacetic acid,
                                     Triisopropanolamine salt
                                     solution.\1\
                                    Diethylenetriaminepentaacetic acid,
                                     pentasodium salt solution.
                                    Dodecyl diphenyl ether disulfonate
                                     (alternately disulphonate)
                                     solution.
                                    Drilling brines (containing Calcium,
                                     Potassium, or Sodium salts).
                                    Drilling brines (containing Zinc
                                     salts).
                                    Drilling brines, including: Calcium
                                     bromide solution, Calcium chloride
                                     solution, and Sodium chloride
                                     solution.
                                    Drilling mud (low toxicity) (if non-
                                     flammable or non-combustible).
                                    Ethylenediaminetetracetic acid/
                                     tetrasodium salt solution.
                                    Ethylene-Vinyl acetate copolymer
                                     (emulsion).
                                    Ferric
                                     hydroxyethylethylenediaminetriaceti
                                     c acid, trisodium salt solution.\1\
                                    Fish solubles (water-based fish meal
                                     extracts).
                                    Fructose solution
                                    Fumaric adduct of Rosin, water
                                     dispersion
                                    Glucose solution.
                                    Hexamethylenediamine adipate (50% in
                                     water).
                                    Hexamethylenediamine adipate
                                     solution
                                    N-(Hydroxyethyl)ethylenediamine
                                     triacetic acid, trisodium salt
                                     solution.
                                    Kaolin clay solution.
                                    Kaolin slurry.
                                    Latex, liquid synthetic.
                                    Latex: Carboxylated Styrene-
                                     Butadiene copolymer; Styrene-
                                     butadiene rubber.
                                    Lauryl polyglucose.
                                    Lauryl polyglucose (50% or less).
                                    Lignin liquor
                                    Ligninsulfonic (alternately
                                     Ligninsulphonic) acid, magnesium
                                     salt solution.
                                    Ligninsulfonic (alternately
                                     Ligninsulphonic) acid, sodium salt
                                     solution.
                                    Liquid Streptomyces solubles
                                    L-Lysine solution (60% or less)
                                    Magnesium nitrate solution (66.7%)
                                    Microsilica slurry.
                                    Milk.
                                    N-Methylglucamine solution
                                    N-Methylglucamine solution (70% or
                                     less)
                                    Naphthenic acid, sodium salt
                                     solution
                                    Pentasodium salt of
                                     Diethylenetriaminepentaacetic acid
                                     solution.

[[Page 139]]

 
                                    Phenol solutions (2% or less).
                                    Polyacrylic acid solution (40% or
                                     less)
                                    Potassium chloride solution
                                    Potassium chloride solution (10% or
                                     more).
                                    Potassium chloride solution (less
                                     than 26%)
                                    Potassium thiosulfate (alternately
                                     thiosulphate) (50% or less).
                                    Rosin soap (disproportionated)
                                     solution
                                    Sewage sludge.
                                    Silica slurry.
                                    Sludge, treated.
                                    Sodium bromide solution (less than
                                     50%)
                                    Sodium hydrogen sulfite (alternately
                                     sulphite) solution (45% or less).
                                    Sodium lignosulfonate (alternately
                                     lignosulphonate) solution.
                                    Sodium naphthalene sulfonate
                                     solution (40% or less), see
                                     Naphthalene sulphonic acid, sodium
                                     salt solution (40% or less).
                                    Sodium naphthenate solution, see
                                     Naphthenic acid, sodium salt
                                     solution.
                                    Sodium poly(4+)acrylate solution.
                                    Sodium polyacrylate solution.\1\
                                    Sodium salt of Ferric
                                     hydroxyethylethylenediaminetriaceti
                                     c acid solution.
                                    Sodium silicate solution.\1\
                                    Sodium sulfide (alternately
                                     sulphide) solution (15% or less).
                                    Sodium sulfite (alternately
                                     sulphite) solution (25% or less).
                                    Sodium tartrates/Sodium succinates
                                     solution.
                                    Sulfonated (alternately Sulphonated)
                                     polyacrylate solution.\1\
                                    Tall oil soap (disproportionated)
                                     solution
                                    Tetrasodium salt of
                                     ethylenediaminetetraacetic acid
                                     solution.
                                    Titanium dioxide slurry
                                    Triisopropanolamine salt of 2,4-
                                     Dichlorophenoxyacetic acid solution
                                    Trisodium salt of N-
                                     (Hydroxyethyl)ethylenediaminetriace
                                     tic acid solution.
                                    Urea solution.
                                    Urea/Ammonium nitrate solution
                                     (containing less than 1% free
                                     Ammonia).
                                    Urea/Ammonium phosphate solution.
                                    Vegetable protein solution
                                     (hydrolyzed).
                                    Water.
------------------------------------------------------------------------
Notes:
\1\ See Appendix I to 46 CFR part 150 (Exceptions to the Chart).
\2\ See Appendix I to 46 CFR part 150 (Exceptions to the Chart).


[78 FR 50187, Aug. 16, 2013, as amended at USCG-2013-0423, 85 FR 21700, 
Apr. 17, 2020; USCG-2013-0423, 85 FR 27309, May 8, 2020]



          Sec. Appendix I to Part 150--Exceptions to the Chart

    (a) The binary combinations listed below have been tested as 
prescribed in Appendix III to part 150 and found not to be dangerously 
reactive. These combinations are exceptions to Figure 1 of part 150 
(Compatibility Chart) and may be stowed in adjacent tanks.

------------------------------------------------------------------------
        Member of reactive group                 Compatible with
------------------------------------------------------------------------
Acetone (18)...........................  Diethylenetriamine (7).
Acetone cyanohydrin (0)................  Acetic acid (4).
                                         Acrylates (14).
                                         Alcohols, Glycols (20).
                                         Aldehydes (19).
                                         Aromatic Hydrocarbon Mixtures
                                          (32).
                                         Carbon Disulfide (alternately
                                          Disulphide) (38).
                                         Esters (34).
                                         Ethers (41).
                                         Glycol Ethers (40).
                                         Halogenated Hydrocarbons (36).
                                         Ketones (18).
                                         Miscellaneous Hydrocarbon
                                          Mixtures (33).
                                         Nitriles (37).
                                         Nitrocompounds (42).
                                         Olefins (30).
                                         Paraffins (31).
                                         Phenols, Cresols (21).
                                         Substituted Allyls (15).
                                         Sulfolane (alternately
                                          Sulpholane) (39).

[[Page 140]]

 
                                         Vinyl Acetate (13).
                                         Vinyl Halides (35).
Acrylonitrile (15).....................  Triethanolamine (8).
1,3-Butylene glycol (20)...............  Morpholine (7).
1,4-Butylene glycol (20)...............  Ethylamine (7).
                                         Triethanolamine (8).
gamma-Butyrolactone (0)................  N-Methyl-2-pyrrolidone (9).
Caustic potash, 50% or less (5)........  Bio-fuel blends of Gasoline and
                                          Ethyl alcohol (25%
                                          but <99% by volume) (20).
                                         n-Butyl alcohol (20).
                                         Cetyl alcohol (Hexadecanol)
                                          (20).
                                         Ethyl alcohol (20).
                                         Ethylene glycol (20).
                                         Isobutyl alcohol (20).
                                         Isooctyl alcohol (20).
                                         Isopropyl alcohol (20).
                                         Methyl alcohol (20).
                                         Propylene glycol (20).
Caustic soda, 50% or less (5)..........  Acrylonitrile/Styrene copolymer
                                          dispersion in Polyether polyol
                                          (20).
                                         Alcohol (C12-C16) poly(1-
                                          6)ethoxylates (20).
                                         Bio-fuel blends of Gasoline and
                                          Ethyl alcohol (25%
                                          but <99% by volume) (20).
                                         Butyl alcohol (20).
                                         tert-Butyl alcohol, Methanol
                                          mixtures (20).
                                         Cetyl alcohol (Hexadecanol)
                                          (20).
                                         Decyl alcohol (20).
                                         Diacetone alcohol (20).
                                         Diethylene glycol (40).
                                         Dodecyl alcohol (20).
                                         Ethyl alcohol (20).
                                         Ethyl alcohol (40% whiskey)
                                          (20).
                                         Ethylene glycol (20).
                                         Ethylene glycol, Diethylene
                                          glycol mixture (20).
                                         Ethyl hexanol (Octyl alcohol)
                                          (20).
                                         Isobutyl alcohol (20).
                                         Isodecyl alcohol (20).
                                         Isononyl alcohol (20).
                                         Isopropyl alcohol (20).
                                         Isotridecanol (20).
                                         Methyl alcohol (20).
                                         Nonyl alcohol (20).
                                         Propyl alcohol (20).
                                         Propylene glycol (20).
                                         Sodium chlorate solution (0).
Dimethyl disulfide (0).................  Acrylates (14).
                                         Alcohols, Glycols (20).
                                         Aromatic Hydrocarbon Mixtures
                                          (32).
                                         Esters (34).
                                         Halogenated Hydrocarbons (36).
                                         Ketones (18).
                                         Methyl tert-butyl ether (41).
                                         Olefins (30).
                                         Organic Acids (4).
                                         Organic Anhydrides (11).
                                         Paraffins (31).
                                         Phenols, Cresols (21).
Diphenylmethane diisocyanate (12)......  2,2-Dimethylpropane-1,3-diol
                                          (20).
                                         Polypropylene glycol (40).
tert-Dodecanethiol (20)................  Caustic soda solution (50%)
                                          (5).
                                         Isopropylamine solution (70%)
                                          (7).
                                         Polymethylene polyphenyl
                                          isocyanate (12).
                                         Toluene diisocyanate (12).
Dodecyl and Tetradecylamine mixture (7)  Tall oil, fatty acid (34).
Ethylenediamine (7)....................  Bio-fuel blends of Gasoline and
                                          Ethyl alcohol (25%
                                          but <99% by volume) (20).
                                         Butyl alcohol (20).
                                         tert-Butyl alcohol (20).
                                         Butylene glycol (20).
                                         Creosote (21).
                                         Diethylene glycol (40).
                                         Diisobutyl ketone (18).
                                         Ethyl alcohol (20).
                                         Ethylene glycol (20).

[[Page 141]]

 
                                         Ethyl hexanol (20).
                                         Fatty alcohols (C12-C14).
                                         Glycerine (20).
                                         Isononyl alcohol (20).
                                         Isophorone (18).
                                         Methyl butyl ketone (18).
                                         Methyl ethyl ketone (18).
                                         Methyl isobutyl ketone (18).
                                         Propyl alcohol (20).
                                         Propylene glycol (20).
Lactic acid (0)........................  Acetic acid (4).
                                         Benzene (32).
                                         Ethanol (20).
                                         Polypropylene glycol (40).
                                         Vinyl acetate (13).
Oleum (0)..............................  Hexane (31).
                                         Dichloromethane (36).
                                         Perchloroethylene (36).
1,2-Propylene glycol (20)..............  Diethylenetriamine (7).
                                         Polyethylene polyamines (7).
                                         Triethylenetetramine (7).
Sodium cresylate as Cresylate spent      Methyl alcohol (20).
 caustic (5).
Sodium dichromate solution (70% or       Acetone (18).
 less) (0).
                                         n-Butyl alcohol (20).
                                         Ethyl acetate (34).
                                         1-Hexene (30).
                                         Methyl alcohol (20).
                                         Octene (all isomers) (30).
                                         Phosphoric acid (1).
Sodium hydrosulfide (alternately         Isopropyl alcohol (20).
 hydrosulphide) solution (45% or less)
 (5).
                                         Methyl alcohol (20).
Sodium Methylate 21-30% in methanol (0)  1,2-Dichloropropane (36).
                                         Chlorobenzene (36).
                                         Cyclohexanone (18).
                                         Cyclohexanone, Cyclohexanol
                                          mixtures (18).
                                         Diethanolamine (8).
                                         Diisononyl phthalate (34).
                                         Dimethylformamide (10).
                                         Ethyl alcohol (20).
                                         Ethylene glycol (20).
                                         Furfuryl alcohol (20).
                                         Heptene (all isomers) (30).
                                         Isobutyl alcohol (20).
                                         Isopropyl alcohol (20).
                                         Lubricating oil (33).
                                         Methyl ethyl ketone (18).
                                         Nonene (all isomers) (30).
                                         Nonyl alcohol (all isomers)
                                          (20).
                                         Octene (all isomers) (30).
                                         Perchloroethylene (36).
                                         Polyisobutenamine in aliphatic
                                          (C10-C14) solvent (7).
                                         o-Toluidine (9).
                                         Xylene (32).
Sulfuric (alternately Sulphuric) acid    Coconut oil (34).
 (2).
                                         Coconut oil, fatty acid (34).
                                         Palm oil (34).
                                         Soyabean oil (34).
                                         Tallow (34).
Sulfuric (alternately Sulphuric) acid,   Choice white grease tallow
 98% or less (2).                         (34).
Urea/Ammonium Nitrate solution           Magnesium chloride solutions
 (containing less than 1% free Ammonia)   (0).
 (43).
------------------------------------------------------------------------

    (b) The binary combinations listed below have been determined to be 
dangerously reactive, based either on data obtained in the literature or 
on laboratory testing that has been carried out in accordance with 
procedures prescribed in Appendix III. These combinations are exceptions 
to Figure 1 of part 150 (Compatibility Chart) and may not be stowed in 
adjacent tanks.
    Acetone cyanohydrin (0) is not compatible with Groups 1-12, 16, 17 
or 22.
    Acrolein (19) is not compatible with Group 1, Non-Oxidizing Mineral 
Acids.

[[Page 142]]

    Acrylic acid (4) is not compatible with Group 9, Aromatic Amines.
    Acrylonitrile (15) is not compatible with Group 5, Caustics.
    Alkyl (C7-C9) nitrates (34) is not compatible with Group 1, Non-
Oxidizing Mineral Acids.
    Alkylbenzene sulfonic (alternately sulphonic) acid (less than 4%) 
(0) is not compatible with Groups 1-3, 5-9, 15, 16, 18, 19, 30, 34, 37, 
or strong oxidizers.
    Allyl alcohol (15) is not compatible with Group 12, Isocyanates.
    Aluminum sulfate (alternately Aluminium sulphate) solution (43) is 
not compatible with Groups 5-11.
    Ammonium bisulfite (alternately bisulphite) solution (70% or less) 
(43) is not compatible with Groups 1 or 3-5.
    Benzenesulfonyl (alternately Benzenesulphonyl) chloride (0) is not 
compatible with Groups 5-7, or 43.
    Butylene glycol (20) is not compatible with Caustic soda solution 
(5).
    gamma-Butyrolactone (0) is not compatible with Groups 1-9.
    C9 Resinfeed (DSM) (32) is not compatible with Group 2, Sulfuric 
(alternately Sulphuric) Acids.
    Carbon tetrachloride (36) is not compatible with 
Tetraethylenepentamine or Triethylenetetramine, both Group 7, Aliphatic 
Amines.
    Catoxid feedstock (36) is not compatible with Groups 1-5, or 12.
    Caustic soda solution (5) is not compatible with Butylene glycol 
(20).
    1-(4-Chlorophenyl)-4,4-dimethyl pentan-3-one (18) is not compatible 
with Group 5, Caustics, or Group 10, Amides.
    Crotonaldehyde (19) is not compatible with Group 1, Non-Oxidizing 
Mineral Acids.
    Cyclohexanone/Cyclohexanol mixture (18) is not compatible with Group 
12, Isocyanates.
    2,4-Dichlorophenoxyacetic acid, Dimethylamine salt solution (70% or 
less) (0) is not compatible with Groups 1-5, 11, 12, or 16.
    2,4-Dichlorophenoxyacetic acid, Triisopropanolamine salt solution 
(43) is not compatible with Group 3, Nitric Acids.
    Diethylenetriamine (7) is not compatible with 1,2,3-
Trichloropropane, Group 36, Halogenated Hydrocarbons.
    Dimethyl hydrogen phosphite (34) is not compatible with Groups 1 or 
4.
    Dimethyl naphthalene sulfonic (alternately sulphonic) acid, sodium 
salt solution (34) is not compatible with Group 12, or Formaldehyde, or 
with strong oxidizing agents.
    Dodecylbenzenesulfonic (alternately Dodecylbenzenesulphonic) acid 
(0) is not compatible with oxidizing agents or Groups 1-3, 5-9, 15, 16, 
18, 19, 30, 34, or 37.
    Ethyl tert-butyl ether (41) is not compatible with Group 1, Non-
Oxidizing Mineral Acids.
    Ethylenediamine (7) and Ethyleneamine EA 1302 (7) are not compatible 
with either Ethylene dichloride (36) or 1,2,3-Trichloropropane (36).
    Ethylene dichloride (36) is not compatible with Ethylenediamine (7) 
or Ethyleneamine EA 1302 (7).
    Ethylidene norbornene (30) is not compatible with Groups 1-3 or 5-8.
    2-Ethyl-3-propylacrolein (19) is not compatible with Group 1, Non-
Oxidizing Mineral Acids.
    Fatty acids, essentially linear (C6-C18) 2-ethylhexyl ester (34) is 
not compatible with Group 3, Nitric Acids.
    Ferric hydroxyethylethylenediamine triacetic acid, Triodium salt 
solution (43) is not compatible with Group 3, Nitric Acids.
    Fish oil (34) is not compatible with Sulfuric (alternately 
Sulphuric) acid (2).
    Formaldehyde (50% or more) in Methyl alcohol (over 30%) (19) is not 
compatible with Group 12, Isocyanates.
    Formic acid (4) is not compatible with Furfuryl alcohol (20).
    Furfuryl alcohol (20) is not compatible with Group 1, Non-Oxidizing 
Mineral Acids, or with Formic acid (4).
    1,6-Hexanediol distillation overheads (4) is not compatible with 
Group 3, Nitric Acids, or Group 9, Aromatic Amines.
    2-Hydroxyethyl acrylate (14) is not compatible with Groups 5, 6, or 
12.
    Isophorone (18) is not compatible with Group 8, Alkanolamines.
    Lactic acid (0) is not compatible with Caustic soda solution (5).
    Magnesium chloride solution (0) is not compatible with Groups 2, 3, 
5, 6, or 12.
    Mesityl oxide (18) is not compatible with Group 8, Alkanolamines.
    Methacrylonitrile (15) is not compatible with Group 5, Caustics.
    Methyl tert-butyl ether (41) is not compatible with Group 1, Non-
Oxidizing Mineral Acids.
    Nitroethane/1-Nitropropane (each 15% or more) mixture (42) is not 
compatible with Group 7, Aliphatic Amines; Group 8, Alkanolamines; or 
Group 9, Aromatic Amines.
    o-Nitrophenol (0) is not compatible with Groups 2, 3, or 5-10.
    Nitropropane (60%)/Nitroethane (40%) mixture (42) is not compatible 
with Group 7, Aliphatic Amines; Group 8, Alkanolamines; or Group 9, 
Aromatic Amines.
    Oleum (0) is not compatible with Sulfuric (alternately Sulphuric) 
acid (2) or 1,1,1-Trichloroethane (36).
    Phthalate-based polyester polyol (0) is not compatible with Groups 
2, 3, 5, 7, or 12.
    Polyglycerine, Sodium salts solution (containing less than 3% sodium 
hydroxide) (20)

[[Page 143]]

is not compatible with Groups 1, 4, 11, 16, 17, 19, 21, or 22.
    Propylene, Propane, MAPP gas mixture (containing 12% or less MAPP 
gas) (30) is not compatible with Group 1, Non-Oxidizing Mineral Acids, 
Group 36, Halogenated Hydrocarbons, or with nitrogen dioxide, oxidizing 
agents, or molten sulfur (alternately sulphur) (0).
    Sodium acetate, Glycol, Water mixture (containing 1% or less Sodium 
hydroxide) (5) is not compatible with Group 12, Isocyanates.
    Sodium chlorate solution (50% or less) (0) is not compatible with 
Groups 1-3, 5, 7, 8, 10, 12, 13, 17, or 20.
    Sodium dichromate solution (70% or less) (0) is not compatible with 
Groups 1-3, 5, 7, 8, 10, 12, 13, 17, or 20.
    Sodium dimethyl naphthalene sulfonate solution (34) is not 
compatible with Group 12, or Formaldehyde, or strong oxidizing agents.
    Sodium hydrogen sulfide (alternately sulphide) (6% or less)/Sodium 
carbonate solution (3% or less) (0) is not compatible with Group 6, 
Ammonia, or Group 7, Aliphatic Amines.
    Sodium hydrosulfide (alternately hydrosulphide) solution (45% or 
less) (5) is not compatible with Group 6, Ammonia, or Group 7, Aliphatic 
Amines.
    Sodium hydrosulfide (alternately hydrosulphide), Ammonium sulfide 
(alternately sulphide) solution (5) is not compatible with Group 6, 
Ammonia, or Group 7, Aliphatic Amines.
    Sodium polyacrylate solution (43) is not compatible with Group 3, 
Nitric Acids.
    Sodium silicate solution (43) is not compatible with Group 3, Nitric 
Acids.
    Sodium sulfide, hydrosulfide (alternately sulphide, hydrosulphide) 
solution (0) is not compatible with Group 6, Ammonia, or Group 7, 
Aliphatic Amines.
    Sodium thiocyanate (56% or less) (0) is not compatible with Groups 
1-4.
    Sulfonated (alternately Sulphonated) polyacrylate solution (43) is 
not compatible with Group 5, Caustics.
    Sulfuric (alternately Sulphuric) acid (2) is not compatible with 
Fish oil (34), or Oleum (0).
    Tall oil fatty acid (Resin acids less than 20%) (34) is not 
compatible with Group 5, Caustics.
    Tallow fatty acid (34) is not compatible with Group 5, Caustics.
    Tetraethylenepentamine (7) is not compatible with Carbon 
tetrachloride, Group 36, Halogenated Hydrocarbons.
    1,1,1-Trichloroethane (36) is not compatible with Oleum (0).
    Trichloroethylene (36) is not compatible with Group 5, Caustics.
    1,2,3-Trichloropropane (36) is not compatible with 
Diethylenetriamine, Ethylenediamine, Ethyleaneamine EA 1302, or 
Triethylenetetramine, all Group 7, Aliphatic Amines.
    Triethylenetetramine (7) is not compatible with Carbon 
tetrachloride, or 1,2,3-Trichloropropane, both Group 36, Halogenated 
Hydrocarbons.
    Triethyl phosphite (34) is not compatible with Group 1, Non-
Oxidizing Mineral Acids, or Group 4, Organic Acids.
    Trimethyl phosphite (34) is not compatible with Group 1, Non-
Oxidizing Mineral Acids, or Group 4, Organic Acids.
    1,3,5-Trioxane (41) is not compatible with Group 1, Non-Oxidizing 
Mineral Acids, or Group 4, Organic Acids.
    Vinyl neodecanoate (13) is not compatible with Group 5, Caustics.

[78 FR 50205, Aug. 16, 2013, as amended at USCG-2013-0423, 85 FR 21700, 
Apr. 17, 2020]



          Sec. Appendix II to Part 150--Explanation of Figure 1

    Definition of a hazardous reaction-- As a first approximation, a 
mixture of two cargoes is considered hazardous when, under specified 
condition, the temperature rise of the mixture exceeds 25 [deg]C or a 
gas is evolved. It is possible for the reaction of two cargoes to 
produce a product that is significantly more flammable or toxic than the 
original cargoes even though the reaction is non-hazardous from 
temperature or pressure considerations, although no examples of such a 
reaction are known at this time.
    Chart format-- There are different degrees of reactivity among the 
various cargoes. Many of them are relatively non-reactive: For example, 
aromatic hydrocarbons or paraffins. Others will form hazardous 
combinations with many groups: For example, the inorganic acids.
    The cargo groups in the compatibility chart are separated into two 
categories: 1 through 22 are ``Reactive Groups'' and 30 through 43 are 
``Cargo Groups''. Left unassigned and available for future expansion are 
groups 23 through 29 and those past 43. Reactive Groups contain products 
which are chemically the most reactive; dangerous combinations may 
result between members of different Reactive Groups and between members 
of Reactive Groups and Cargo Groups. Products assigned to Cargo Groups, 
however, are much less reactive; dangerous combinations involving these 
can be formed only with members of certain Reactive Groups. Cargo Groups 
do not react hazardously with one another.
    Using the Compatibility Chart-- The following procedure explains how 
the compatibility chart should be used to find compatibility 
information:
    (1) Determine the group numbers of the two cargoes by referring to 
the alphabetical listing of cargoes and the corresponding

[[Page 144]]

groups (Table I). Many cargoes are listed under their parent names; 
unless otherwise indicated, isomers or mixtures of isomers of a 
particular cargo are assigned to the same group. For example, to find 
the group number for Isobutyl Alcohol, look under the parent name Butyl 
Alcohol. Similarly, the group number for para-Xylene is found under the 
entry Xylene. If a cargo cannot be found in this listing, contact the 
Coast Guard for a group determination (see Sec.  150.140).
    (2) If both group numbers are between 30 and 43 inclusive, the 
products are compatible and the chart need not be used.
    (3) If both group numbers do not fall between 30 and 43 inclusive, 
locate one of the numbers on the left of the chart (Cargo Groups) and 
the other across the top (Reactive Groups). (Note that if a group number 
is between 30 and 43, it can only be found on the left side of the 
chart.) The box formed by the intersection of the column and row 
containing the two numbers will contain one of the following:
    (a) Blank--The two cargoes are compatible.
    (b) ``X''--The two cargoes are not compatible.

(Note that reactivity may vary among the group members. Refer to Table I 
or Table II to find whether the products in question are referenced by a 
footnote which indicates that exceptions exist and are listed in 
Appendix I. Unless the combination is specifically mentioned in Appendix 
I, it is compatible.)

                                Examples
------------------------------------------------------------------------
               Combination                Groups        Compatible
------------------------------------------------------------------------
Butyraldehyde/Acetic Acid...............    19/4  Yes.
Allyl Alcohol/Toluene Diisocyanate......   15/12  No.
Decene/Ethyl Benzene....................   30/32  Yes.
Ethanolamine/Acetone....................    8/18  Yes.
Ammonia/Dimethylformamide...............    6/10  No.
------------------------------------------------------------------------


[CGD 75-59, 45 FR 70263, Oct. 23, 1980, as amended by CGD 83-047, 50 FR 
33046, Aug. 16, 1985]



   Sec. Appendix III to Part 150--Testing Procedures for Determining 
                         Exceptions to the Chart

    experimental procedure for evaluating binary chemical reactivity

    General safety precautions--Chemical reactivity tests have, by their 
nature, serious potential for injuring the experimenter or destroying 
equipment. The experimenter should 1) have knowledge of the magnitude of 
the reactivity to be expected, 2) use adequate facilities and protective 
equipment to prevent injury from splatter of materials or release of 
fumes, and 3) start on a small scale so that unexpected reactions can be 
safely contained. All tests should be performed in a well-ventilated 
laboratory hood provided with shields.
    Testing chemicals other than liquids--The procedure outlined below 
was developed for chemicals which are liquids at ambient temperatures. 
If one or both chemicals are normally shipped at elevated temperatures, 
the same procedure may be followed except the chemicals are tested at 
their respective shipping temperatures and the oil bath in Step 3 is 
maintained at a level 25 [deg]C above the higher temperature. This 
information is then indicated on the data sheet. If one of the chemicals 
is a gas at ambient temperatures, consult the Coast Guard for additional 
instructions before proceeding with the compatibility test.

                                 Step 1

    Objective--To determine if the test chemicals react violently and 
present a safety hazard in further tests.
    Procedure--Place 0.5ml of one (A) of the test chemicals in a 25 x 
150mm test tube. Clamp the test tube to a stand behind a safety shield 
(in a hood). Carefully add from a dropper 0.5ml of the other substance 
(B). Shake to induce mixing. If no immediate reaction occurs, retain the 
mixture for at least 10 minutes to check for a delayed reaction.
    Results--If a violent reaction occurs, such as sputtering, boiling 
of reactants or release of fumes, record the results on the Data Sheet 
(appendix IV) and do not proceed to Step 2. If no reaction or a minor 
reaction occurs, proceed to Step 2.

                                 Step 2

    Objective--To determine the heat of reaction of two chemicals on 
mixing under specified conditions.
    Procedure--These separate mixes of the proposed binary combination 
will be tested. These are 2 ml : 18 ml, 10 ml : 10 ml, and 18 ml : 2 ml, 
respectively, to result in a final mixture of about 20 ml in each case.
    A reference-junctioned thermocouple is prepared by inserting two 
lengths of 20 gauge or finer iron-constantan or chromelalumel duplex 
thermocouple wire into glass capilary sheaths. The common wire of each 
probe is joined, while the other wire of each is connected to a strip-
chart recorder. The thermocouple probe which produces a negative pen 
deflection upon warming is the reference junction and is placed in a 
test tube of water at ambient laboratory temperature. The other probe is 
placed near the bottom of a Dewar flask of about 300ml capacity, such 
that the thermocouple will be below the surface of the test mixture. The 
Dewar flask is equipped with a magnetic stirrer having a stirring bar 
coated with an inert material such as a fluorinated hydrocarbon.

[[Page 145]]

    Start the temperature recorder and stirrer. Deliver the test 
chemicals to the Dewar Flask simultaneously from separate graduated 
syringes. If an exothermic reaction occurs, continue the test until the 
maximum temperature is reached and begins to subside. If no apparent 
reaction occurs, continue the test for at least 30 minutes to check for 
a delayed reaction. Stop agitation and observe the mixture at five-
minute intervals to determine if the mixture is miscible, if gases are 
evolved, or if other visible changes occur. In the interest of safety, a 
mirror can be used for these observations. Repeat the above test for the 
other mixture combinations.
    Results--Record the results in the appropriate places on the Data 
Sheet. If no reaction occurs or if the temperature rise is less than 25 
[deg]C, proceed to Step 3. If the observed temperature rise exceeds 25 
[deg]C or gases are evolved, do not proceed to Step 3.

                                 Step 3

    Objective--To determine if exothermic reactions occur at 
temperatures up to 50 [deg]C.
    Procedure--If a non-hazardous reaction occurred in Step 2, the ratio 
of chemicals which resulted in the greatest temperature rise will be 
tested. Fresh chemicals will be used with a total volume for this test 
of about 10ml (a ratio of 1ml:9ml, 5ml:5ml, or 9ml:1ml). If no reaction 
was observed in Step 2, use a ratio of 5ml:5ml. Using the thermocouple 
prepared for Step 2, insert the reference probe into a 25 x 150mm test 
tube containing 10ml of water. Place the other probe into an empty test 
tube. Start the temperature recorder and add the two chemicals of the 
combination, one at a time, to the empty test tube. Lower the two test 
tubes into an oil bath maintained at 50 2 [deg]C. 
Hold the samples in the oil bath until the maximum temperature 
differential is recorded, and in all cases at least 15 minutes. Observe 
the test mixture to determine if gases are evolved or if other visible 
changes occur. Follow prescribed safety precautions.
    Results--Record the maximum differential temperature measured, the 
time required to reach this temperature, and any other observations in 
the proper space on the Data Sheet.
    Send a copy of the Data Sheet for each binary chemical mixture 
tested to: Commandant (CG-ENG-5), Attn: Hazardous Materials Division, 
U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue SE., 
Washington, DC 20593-7509.

[CGD 75-59, 45 FR 70263, Oct. 23, 1980, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 83-047, 50 FR 33046, Aug. 16, 1985; CGD 88-070, 
53 FR 34535, Sept. 7, 19885; CGD 96-041, 61 FR 50731, Sept. 27, 1996; 
USCG-2012-0832, 77 FR 59783, Oct. 1, 2012; USCG-2013-0671, 78 FR 60155, 
Sept. 30, 2013; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]

[[Page 146]]



                Sec. Appendix IV to Part 150--Data Sheet
[GRAPHIC] [TIFF OMITTED] TC02FE91.080


[[Page 147]]


[GRAPHIC] [TIFF OMITTED] TC02FE91.081



PART 151_BARGES CARRYING BULK LIQUID HAZARDOUS MATERIAL CARGOES--Table of Contents



                         Subpart 151.01_General

Sec.
151.01-1 Applicability.
151.01-2 Incorporation by reference.
151.01-3 [Reserved]
151.01-5 [Reserved]
151.01-10 Application of vessel inspection regulations.
151.01-15 Dangerous cargoes not specifically named.
151.01-20 Use of minimum requirements.
151.01-25 Existing barges.
151.01-30 Effective date.
151.01-35 Right of appeal.

                       Subpart 151.02_Equivalents

151.02-1 Conditions under which equivalents may be used.
151.02-5 Design of unmanned barges.

                       Subpart 151.03_Definitions

151.03-1 Definitions of terms.
151.03-3 Angle of downflooding.
151.03-5 Approved.
151.03-7 Barge.
151.03-9 Cargo.
151.03-11 Coastwise.
151.03-13 Cofferdam.
151.03-15 Commandant.
151.03-17 Compatible.
151.03-19 Environment.
151.03-21 Filling density.
151.03-23 Flame arrestor.
151.03-25 Flame screen.

[[Page 148]]

151.03-27 Gas free.
151.03-29 Great Lakes.
151.03-30 Hazardous material.
151.03-31 Headquarters.
151.03-33 Lakes, bays, and sounds.
151.03-35 Limiting draft.
151.03-36 Liquid.
151.03-37 Maximum allowable working pressure.
151.03-38 Nondestructive testing.
151.03-39 Ocean.
151.03-41 Officer in Charge, Marine Inspection (OCMI).
151.03-43 Pressure.
151.03-45 Rivers.
151.03-47 Service.
151.03-49 Sounding tube.
151.03-51 Tank barge.
151.03-53 Tankerman.
151.03-55 [Reserved]

               Subpart 151.04_Inspection and Certification

151.04-1 Certificate of inspection.
151.04-2 Inspection required.
151.04-3 Initial inspection.
151.04-5 Inspection for certification.
151.04-7 Nondestructive testing.

   Subpart 151.05_Summary of Minimum Requirements for Specific Cargoes

151.05-1 Explanation of column headings in Table 151.05.
151.05-2 Compliance with requirements for tank barges carrying benzene 
          and benzene containing cargoes, or butyl acrylate cargoes.

Table 151.05 to Subpart 151.05 of Part 151--Summary of Minimum 
          Requirements

           Subpart 151.10_Barge Hull Construction Requirements

151.10-1 Barge hull classifications.
151.10-5 Subdivision and stability.
151.10-15 Certificate endorsement.
151.10-20 Hull construction.

   Subpart 151.12_Equipment and Operating Requirements for Control of 
                  Pollution From Category D NLS Cargoes

151.12-5 Equipment for Category D NLS.
151.12-10 Operation of oceangoing non-self-propelled ships carrying 
          Category D NLS.

                    Subpart 151.13_Cargo Segregation

151.13-1 General.
151.13-5 Cargo segregation--tanks.

                          Subpart 151.15_Tanks

151.15-1 Tank types.
151.15-3 Construction.
151.15-5 Venting.
151.15-6 Venting piping.
151.15-10 Cargo gauging devices.

                      Subpart 151.20_Cargo Transfer

151.20-1 Piping--general.
151.20-5 Cargo system valving requirements.
151.20-10 Cargo system instrumentation.
151.20-15 Cargo hose if carried on the barge.
151.20-20 Cargo transfer methods.

                  Subpart 151.25_Environmental Control

151.25-1 Cargo tank.
151.25-2 Cargo handling space.

               Subpart 151.30_Portable Fire Extinguishers

151.30-1 Type.

      Subpart 151.40_Temperature or Pressure Control Installations

151.40-1 Definitions.
151.40-2 Materials.
151.40-5 Construction.
151.40-10 Operational requirements.
151.40-11 Refrigeration systems.

                        Subpart 151.45_Operations

151.45-1 General.
151.45-2 Special operating requirements.
151.45-3 Manning.
151.45-4 Cargo-handling.
151.45-5 Open hopper barges.
151.45-6 Maximum amount of cargo.
151.45-7 Shipping papers.
151.45-8 Illness, alcohol, drugs.
151.45-9 Signals.

                   Subpart 151.50_Special Requirements

151.50-1 General.
151.50-5 Cargoes having toxic properties.
151.50-6 Motor fuel antiknock compounds.
151.50-10 Alkylene oxides.
151.50-12 Ethylene oxide.
151.50-13 Propylene oxide.
151.50-20 Inorganic acids.
151.50-21 Sulfuric acid.
151.50-22 Hydrochloric acid.
151.50-23 Phosphoric acid.
151.50-30 Compressed gases.
151.50-31 Chlorine.
151.50-32 Ammonia, anhydrous.
151.50-34 Vinyl chloride (vinyl chloride monomer).
151.50-36 Argon or nitrogen.
151.50-40 Additional requirements for carbon disulfide (carbon 
          bisulfide) and ethyl ether.
151.50-41 Carbon disulfide (carbon bisulfide).
151.50-42 Ethyl ether.
151.50-50 Elemental phosphorus in water.
151.50-55 Sulfur (molten).

[[Page 149]]

151.50-60 Benzene.
151.50-70 Cargoes requiring inhibition or stabilization.
151.50-73 Chemical protective clothing.
151.50-74 Ethylidene norbornene.
151.50-75 Ferric chloride solution.
151.50-76 Hydrochloric acid, spent (NTE 15%).
151.50-77 Fluorosilicic acid (30% or less) (hydrofluorosilicic acid).
151.50-79 Methyl acetylene-propadiene mixture.
151.50-80 Nitric acid (70% or less).
151.50-81 Special operating requirements for heat sensitive cargoes.
151.50-84 Sulfur dioxide.
151.50-86 Alkyl (C7-C9) nitrates.

    Subpart 151.55_Special Requirements for Materials of Construction

151.55-1 General.

           Subpart 151.56_Prohibited Materials of Construction

151.56-1 Prohibited materials.

            Subpart 151.58_Required Materials of Construction

151.58-1 Required materials.

    Authority: 33 U.S.C. 1903; 46 U.S.C. 3703; Department of Homeland 
Security Delegation No. 0170.1.

    Source: CGFR 70-10, 35 FR 3714, Feb. 25, 1970, unless otherwise 
noted.

    Editorial Note: Nomenclature changes to part 151 appear by USCG-
2009-0702, 74 FR 49236, Sept. 25, 2009, and USCG-2012-0832, 77 FR 59784, 
Oct. 1, 2012.



                         Subpart 151.01_General



Sec.  151.01-1  Applicability.

    This part applies to the following:
    (a) Oceangoing, as defined in 33 CFR 151.05(j), non-self-propelled 
United States ships and non-self-propelled foreign ships operating in 
United States waters that carry a bulk cargo that is--
    (1) Listed in Table 151.05;
    (2) Not being carried in a portable tank regulated under subpart 
98.30 or 98.33 of this chapter; and
    (3) Not an NLS or is an NLS cargo that is a Category D listed in 
Sec.  151.12-5 of this part.
    (b) All non-self-propelled United States ships that are not 
oceangoing that carry a bulk cargo that is--
    (1) Listed in Table 151.05, and
    (2) Not being carried in a portable tank regulated under subpart 
98.30 or 98.33 of this chapter.

[CGD 81-101, 52 FR 7776, Mar. 12, 1987, as amended by CGD 84-043, 55 FR 
37413, Sept. 11, 1990]



Sec.  151.01-2  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 ones 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 National Archives and Records Administration (NARA), and is 
available from the sources indicated in paragraph (b) of this section. 
For information on the availability of this material at NARA, call 202-
741-6030, or go to: http://www.archives.gov/federal_register/
code_of_federal_regulations/ibr_locations.html.
    (b) The standards and specifications approved for incorporation by 
reference in this part and the sections affected, are:

           American Society for Nondestructive Testing (ASNT)

4153 Arlingate Road, Caller 28518, Columbus, OH 43228-0518

ASNT ``Recommended Practice No. SNT-TC-1A (1988), Personnel 
Qualification and Certification in Nondestructive Testing'' 
                                                          151.04-7(c)(2)

      American Society of Mechanical Engineers (ASME) International

Three Park Avenue, New York, NY 10016-5990

ASME Boiler and Pressure Vessel Code Section V, Nondestructive 
Examination (1986)........................................151.04-7(a)(1)

            American Society for Testing and Materials (ASTM)

100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.

ASTM D 4986-98, Standard Test Method for Horizontal Burning 
Characteristics of Cellular Polymeric Materials.................151.15-3
ASTM E 84-98, Standard Test Method

[[Page 150]]

for Surface Burning Characteristics of Building Materials--151.15-3

[CGD 85-061, 54 FR 50965, Dec. 11, 1989, as amended by USCG-1999-6216, 
64 FR 53227, Oct. 1, 1999; USCG-1999-5151, 64 FR 67183, Dec. 1, 1999; 69 
FR 18803, Apr. 9, 2004]



Sec.  151.01-3  [Reserved]



Sec.  151.01-5  [Reserved]



Sec.  151.01-10  Application of vessel inspection regulations.

    (a) The regulations in this part are requirements which may be in 
addition to, supplement, or modify requirements in other subchapters in 
this chapter. When a specific requirement in another part or section in 
another subchapter in this chapter is in conflict with or contrary to 
requirement or intent expressed in this part, the regulations in this 
part shall take precedence.
    (b) Every unmanned tank barge which carries or is intended to carry 
in bulk any liquid or liquefied gas listed in Table 151.05 and has 
flammability or combustibility characteristics as indicated by a fire 
protection requirement in Table 151.05 shall be inspected and 
certificated under the provisions in subchapter D (Tank Vessels) of this 
chapter and the regulations in this part.
    (c) Every unmanned tank barge prior to the carriage in bulk of any 
liquid or liquefied gas listed in Table 151.05 which does not have the 
flammability or combustibility characteristics as indicated by the fire 
protection requirement in Table 151.05 shall be inspected and 
certificated under the applicable provisions of subchapter D or 
subchapter I of this chapter, at the option of the barge owner, in 
addition to the regulations in this part. However, unless the barge 
owner notifies the Officer in Charge, Marine Inspection of his option to 
have the barge inspected and certificated under subchapter I at the time 
he submits the application for inspection (Form CG-3752), the unmanned 
tank barge shall be inspected and certificated under the provisions of 
subchapter D of this chapter and the regulations in this part.
    (c-1) Each unmanned tank barge constructed on or after September 6, 
1977, that carries in bulk a cargo listed in Table 151.05 and that is 
certificated under subchapter I of this chapter must meet the loading 
information requirements in Sec.  31.10-32 of this chapter.
    (d) The provisions of subchapter D of this chapter shall apply to 
all unmanned tank barges which carry in bulk any of the liquids or 
liquefied gases listed in Table 30.25-1 of this chapter. The provisions 
of this part shall not apply to such barges unless it is also desired to 
carry one or more of the liquids or liquefied gases listed in Table 
151.05.
    (e) Manned barges which carry or intend to carry in bulk the cargoes 
specified in Table 151.05 will be considered individually by the 
Commandant and may be required to meet the requirements of this 
subchapter and of subchapter D (Tank Vessels) or I (Cargo and 
Miscellaneous Vessels) of this chapter as applicable.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970]

    Editorial Note: For Federal Register citations affecting Sec.  
151.01-10, see the List of CFR Sections Affected, which appears in the 
Finding Aids section of the printed volume and at www.govinfo.gov.



Sec.  151.01-15  Dangerous cargoes not specifically named.

    (a) Any liquid or liquefied gas, which meets the definitions 
referred to in Sec.  151.01-1 and is not named in Table 151.05 or Table 
30.25-1 of this chapter shall not be transported in bulk in a manned or 
unmanned tank barge without the prior specific approval of the 
Commandant.
    (b) Mixtures or blends of two or more cargoes, one or more of which 
appears in Table 151.05, will be treated as though they were new 
products and specific approval of the Commandant must be obtained prior 
to undertaking their transportation.

[CGFR-70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 81-101, 52 FR 
7777, Mar. 12, 1987; CGD 81-101, 53 FR 28974, Aug. 1, 1988 and 54 FR 
12629, Mar. 28, 1989; CGD 88-100, 54 FR 40029, Sept. 29, 1989]



Sec.  151.01-20  Use of minimum requirements.

    (a) The minimum requirements governing transportation of any liquid 
or liquefied gas listed in Table 151.05 are

[[Page 151]]

set forth in this part when such substances are carried in bulk in 
unmanned tank barges.
    (b) Before any liquid or liquefied gas listed in Table 151.05 may be 
carried in an unmanned tank barge, the certificate of inspection issued 
to such barge shall be appropriately endorsed to show approval to 
transport such cargo.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40029, Sept. 29, 1989]



Sec.  151.01-25  Existing barges.

    (a) Except as provided in paragraph (c) of this section, barges 
certified for, or used within the previous 2 years prior to the 
effective date of this regulation, or barges equivalent to such barges, 
for the transportation of any cargo regulated by this subchapter which 
do not meet the specific requirements herein, may be continued in 
service subject to the following conditions:
    (1) Venting, gauging, and all operating requirements shall be met 
within a 1-year period subsequent to the effective date.
    (2) All other requirements shall be met within a 2-year period 
subsequent to the effective date.
    (b) If an existing barge, which has been designed to carry or has 
regularly been carrying one or more of the cargoes regulated by this 
subchapter, is found to be so arranged, or outfitted that conversion to 
bring it into compliance with any or all of the requirements of this 
subchapter is impractical or impossible, the Commandant, upon 
application, may review the plans of the barge to determine if it is 
suitable and safe for the cargoes to be transported.
    (c) Except for operating and vinyl chloride requirements, barges 
constructed and certificated for the transportation of any cargo for 
which specific regulations existed, in parts 36, 38, 39, 40, and 98 of 
this chapter at the time of their construction or conversion, may 
continue and will be certificated to operate without the requirement 
that they comply with the provisions of subchapter O of this chapter.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 74-167k, 40 FR 
17026, Apr. 16, 1975]



Sec.  151.01-30  Effective date.

    (a) The regulations in this subchapter are effective on and after 
June 1, 1970. However, amendments, revisions, or additions shall become 
effective ninety (90) days after the date of publication in the Federal 
Register unless the Commandant shall fix a different time.
    (b) The regulations in this subchapter are not retroactive in effect 
unless specifically made so at the time the regulations are issued. 
Changes in specification requirements of articles of equipment, or 
materials used in construction of tank barges, shall not apply to such 
items which have been passed as satisfactory until replacement shall 
become necessary, unless a specific finding is made that such equipment 
or materials used is unsafe or hazardous and has to be removed from tank 
barges.



Sec.  151.01-35  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 50381, Dec. 6, 1989]



                       Subpart 151.02_Equivalents



Sec.  151.02-1  Conditions under which equivalents may be used.

    (a) Where in this part 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 any particular provision shall be 
made or arrangement including cargo segregation shall be adopted, the 
Commandant may accept in substitution therefor any other fitting, 
material, apparatus or equipment, or type thereof, or any other 
provision or arrangement. However, the Commandant shall be satisfied by 
suitable evidence that the fitting, material, appliance, apparatus, or 
equipment, or the type thereof, or the provision or arrangement shall be 
at least as effective as that specified in this part.
    (b) In any case where it is shown to the satisfaction of the 
Commandant that the use of any particular equipment, apparatus, or 
arrangement not

[[Page 152]]

specifically required by law is unreasonable or impracticable, the 
Commandant may permit the use of alternate equipment apparatus, or 
arrangement to such an extent and upon such conditions as will insure, 
to his satisfaction, a degree of safety consistent with the minimum 
standards set forth in this part.



Sec.  151.02-5  Design of unmanned barges.

    (a) In order not to inhibit design and application, the Commandant 
may approve vessels of novel design, both new and for conversion, after 
it is shown to his satisfaction that such a vessel is at least as safe 
as any vessel which meets the standards required by this part.
    (b) [Reserved]



                       Subpart 151.03_Definitions



Sec.  151.03-1  Definitions of terms.

    Certain terms used in the regulations in this subchapter are defined 
in this subpart.



Sec.  151.03-3  Angle of downflooding.

    The angle of heel of the vessel at which any opening in the hull not 
provided with a water tight closure would be immersed.



Sec.  151.03-5  Approved.

    This term means approved by the Commandant unless otherwise stated.



Sec.  151.03-7  Barge.

    This term means any non-self-propelled vessel designed to carry 
cargo.



Sec.  151.03-9  Cargo.

    This term means any liquid, gas or solid having one or more of the 
dangerous properties defined in this subchapter.



Sec.  151.03-11  Coastwise.

    This designation refers to all vessels normally navigating the 
waters of any ocean or the Gulf of Mexico 20 nautical miles or less 
offshore.



Sec.  151.03-13  Cofferdam.

    This term means a void or empty space separating two or more 
compartments for the purpose of isolation or to prevent the contents of 
one compartment from entering another in the event of the failure of the 
walls of one to retain their tightness.



Sec.  151.03-15  Commandant.

    This term means Commandant of the U.S. Coast Guard.



Sec.  151.03-17  Compatible.

    Compatible means that a cargo will not react in an unsafe manner 
with other cargo or materials used in construction of the barge. The 
prime considerations are the chemical, physical, or thermal properties 
of the reaction including heat, pressure, toxicity, stability, and 
explosive nature of the reaction and its end products.



Sec.  151.03-19  Environment.

    This term refers to the atmosphere within a cargo tank and the 
spaces adjacent to the tank or spaces in which cargo is handled.



Sec.  151.03-21  Filling density.

    The ratio, expressed as a percentage, of the weight of cargo that 
may be loaded into a tank compared to the weight of water that the tank 
will hold at 60 [deg]F. The weight of a gallon of water at 60 [deg]F in 
air shall be 8.32828 pounds.



Sec.  151.03-23  Flame arrestor.

    Any device or assembly of cellular, tubular, pressure or other type 
used for preventing the passage of flames into enclosed spaces.



Sec.  151.03-25  Flame screen.

    A fitted single screen of corrosion-resistant wire of at least 30 by 
30 mesh or two fitted screens, both of corrosion-resistant wire, of at 
least 20 by 20 mesh spaced not less than one-half inch or more than 1\1/
2\ inches apart.



Sec.  151.03-27  Gas free.

    Free from dangerous concentrations of flammable or toxic gases.



Sec.  151.03-29  Great Lakes.

    A designation for all vessels in Great Lakes service.

[[Page 153]]



Sec.  151.03-30  Hazardous material.

    In this part hazardous material means a liquid material or substance 
that is--
    (a) Flammable or combustible;
    (b) Designated a hazardous substance under section 311(b) of the 
Federal Water Pollution Control Act (33 U.S.C. 1321); or
    (c) Designated a hazardous material under 49 U.S.C. 5103.

    Note: The Environmental Protection Agency designates hazardous 
substances in 40 CFR Table 116.4A. The Coast Guard designates hazardous 
materials that are transported as bulk liquids by water in Sec.  153.40.

[CGD 81-101, 52 FR 7777, Mar. 12, 1987, as amended by CGD 95-028, 62 FR 
51209, Sept. 30, 1997]



Sec.  151.03-31  Headquarters.

    Commandant (CG-5P), Attn: Assistant Commandant for Prevention, U.S. 
Coast Guard Stop 7501, 2703 Martin Luther King Jr. Avenue SE., 
Washington, DC 20593-7501

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-070, 53 FR 
34535, Sept. 7, 1988; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]



Sec.  151.03-33  Lakes, bays, and sounds.

    A designation for all vessels navigating the waters of any of the 
lakes, bays, or sounds other than the waters of the Great Lakes.



Sec.  151.03-35  Limiting draft.

    Maximum allowable draft to which a barge may be loaded. Limiting 
draft is a function of hull type and cargo specific gravity. A barge may 
be assigned different limiting drafts for different hull types or within 
one hull type for different specific gravities.



Sec.  151.03-36  Liquid.

    In this part liquid includes liquefied and compressed gases.

[CGD 81-101, 52 FR 7777, Mar. 12, 1987]



Sec.  151.03-37  Maximum allowable working pressure.

    The maximum allowable working pressure shall be as defined in 
section VIII of the ASME Boiler and Pressure Vessel Code.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85-061, 54 FR 
50965, Dec. 11, 1989]



Sec.  151.03-38  Nondestructive testing.

    Nondestructive testing includes ultrasonic examination, liquid 
penetrant examination, magnetic particle examination, radiographic 
examination, eddy current, and acoustic emission.

[CGD 85-061, 54 FR 50965, Dec. 11, 1989]



Sec.  151.03-39  Ocean.

    A designation for all vessels normally navigating the waters of any 
ocean or the Gulf of Mexico more than 20 nautical miles offshore.



Sec.  151.03-41  Officer in Charge, Marine Inspection (OCMI).

    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 an inspection zone for the performance of duties with 
respect to the enforcement and administration of Subtitle II of Title 
46, U.S. Code, Title 46 and Title 33 U.S. Code, and regulations issued 
under these statutes.

[CGD 95-028, 62 FR 51209, Sept. 30, 1997]



Sec.  151.03-43  Pressure.

    Terminology used in this part are: pounds per square inch gauge 
(p.s.i.g.) or pounds per square inch absolute (p.s.i.a.). 14.7 p.s.i.a. 
is equal to 0 p.s.i.g. P.s.i.g. is normally used in reference to design 
or operating requirements.



Sec.  151.03-45  Rivers.

    A designation for all vessels whose navigation is restricted to 
rivers and/or canals, exclusively.



Sec.  151.03-47  Service.

    The waters upon which a vessel may be operated as endorsed upon the 
certificate of inspection.

[[Page 154]]



Sec.  151.03-49  Sounding tube.

    This is an unperforated tube fitted to an ullage hole, secured so as 
to be vapor tight to the underside of the tank top open at the bottom, 
and extending to within 18 inches or less of the bottom of the tank.



Sec.  151.03-51  Tank barge.

    A non-self-propelled vessel especially constructed or converted to 
carry bulk liquid cargo in tanks.



Sec.  151.03-53  Tankerman.

    The following ratings are established in part 13 of this chapter. 
The terms for the ratings identify persons holding valid merchant 
mariner credentials or merchant mariners' documents for service in the 
ratings issued under that part:
    (a) Tankerman-PIC.
    (b) Tankerman-PIC (Barge).
    (c) Restricted Tankerman-PIC.
    (d) Restricted Tankerman-PIC (Barge).
    (e) Tankerman-Assistant.
    (f) Tankerman-Engineer.

[CGD 79-116, 60 FR 17157, Apr. 4, 1995, as amended by USCG-2006-24371, 
74 FR 11266, Mar. 16, 2009]



Sec. Sec.  151.03-55  [Reserved]



               Subpart 151.04_Inspection and Certification



Sec.  151.04-1  Certificate of inspection.

    (a) A certificate of inspection is required for every unmanned tank 
barge subject to the requirements in this subchapter. A certificate of 
inspection shall be issued to the barge or to its owners by the Officer 
in Charge, Marine Inspection, if the barge is found to comply with 
applicable inspection laws and the regulations in this chapter.
    (b) The certificate of inspection shall be endorsed with respect to 
the waters over which the barge may be operated.
    (c) The certificate shall be endorsed describing the cargoes by name 
as given in Table 151.05 or as specifically approved by the Commandant. 
No other dangerous cargo as defined in Subpart 151.01-1 shall be 
carried. Certificates shall specify maximum cargo weight (short tons), 
maximum density (pounds per gallon) and any operating limitations and a 
limiting draft.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40029, Sept. 29, 1989]



Sec.  151.04-2  Inspection required.

    (a) Every unmanned tank barge subject to the regulations in this 
subchapter shall be inspected every five years. More frequent 
inspections may be required, if necessary, by the Officer in Charge, 
Marine Inspection, to see that the hull, equipment and appliances of the 
vessel comply with the marine inspection laws, and the regulations of 
this subchapter and other subchapters where applicable.
    (b) [Reserved]

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by USCG-2007-29018, 
72 FR 53967, Sept. 21, 2007]



Sec.  151.04-3  Initial inspection.

    (a) The initial inspection which may consist of a series of 
inspections during the construction of an unmanned barge shall include a 
complete inspection of the structure, auxiliary machinery, and 
equipment. The inspection shall be such as to insure that the 
arrangement, materials, and scantlings of the hull structure, tanks and 
pressure vessels and their appurtenances comply with applicable 
regulations of this chapter and with the requirements of this part.
    (b) [Reserved]



Sec.  151.04-5  Inspection for certification.

    (a) An inspection for certification is a prerequisite of the 
reissuance of a Certificate of Inspection as provided for in applicable 
regulations of this chapter.
    (b) Unless otherwise specified in table 151.05, cargo tanks are 
internally examined as follows:
    (1) Where the cargo tank is of the gravity type and the structural 
framing is on the internal tank surface, the tank shall be inspected 
internally at the time of inspection for certification.
    (2) Where the cargo tank is of the gravity type and the structural 
framing is on the external tank surface accessible for examination from 
voids, cofferdams, double bottoms, and other

[[Page 155]]

similar spaces, tanks shall be inspected internally at 4-year intervals.
    (3) If the tank is a pressure-vessel type cargo tank, an internal 
inspection of the tank is conducted within--
    (i) Ten years after the last internal inspection on an unmanned 
barge carrying cargo at temperatures of -67 [deg]F (-55 [deg]C) or 
warmer; or
    (ii) Eight years after the last internal inspection if the tank is a 
pressure type cargo tank carrying cargo at temperatures colder than -67 
[deg]F (-55 [deg]C).
    (4) Internal inspection may be required at more frequent intervals 
as deemed necessary by the Officer in Charge, Marine Inspection.
    (c) An external examination of unlagged tanks and the visible parts 
of lagged tanks is made at each biennial inspection. If the vessel has 
single skin construction, the underwater portion of the tank need not be 
examined unless deemed necessary by the Officer in Charge, Marine 
Inspection. If an external examination of the tank is not possible 
because of insulation, the owner shall ensure that--
    (1) The amount of insulation deemed necessary by the marine 
inspector is removed during each cargo tank internal inspection to allow 
spot external examination of the tanks and insulation; or
    (2) The thickness of the tanks is gauged by a nondestructive means 
accepted by the marine inspector without the removal of insulation.
    (d) If required by the Officer in Charge, Marine Inspection the 
owner shall conduct nondestructive testing of each tank designated by 
the Officer in Charge, Marine Inspection in accordance with Sec.  
151.04-7.
    (e) If the Officer in Charge, Marine Inspection considers a 
hydrostatic test necessary to determine the condition of the tanks, the 
owner shall perform the test at a pressure of 1\1/2\ times the tank's--
    (1) Maximum allowable pressure, as determined by the safety relief 
valve setting; or
    (2) Design pressure, when cargo tanks operate at maximum allowable 
pressures reduced below the design pressure in order to satisfy special 
mechanical stress relief requirements.

    Note: See the ASME Code, Section VIII, Appendix 3 for information on 
design pressure.

    (f) Quick closing valves shall be tested by operating the emergency 
shutoff system from each operating point at the time of each vessel's 
inspection for certification.
    (g) Excess flow valves shall be inspected at the time of inspection 
for certification. The Officer in Charge, Marine Inspection, shall 
satisfy himself that the valve is in working condition by visual 
inspection, and if this is impossible, by one of the following means:
    (1) Removing the valve and bench testing ashore; the valve shall 
close at or below its rated closing flow.
    (2) By any other means acceptable to the Officer in Charge, Marine 
Inspection, which will demonstrate that the valve is operable.
    (h) Pressure vacuum relief valves shall be examined to determine 
that the operating mechanism is free and capable of activation.
    (i) Safety relief valves shall be tested by bench testing or other 
suitable means. The valves shall relieve and reseat within the design 
tolerances of the set pressure, or it shall be removed and reset prior 
to being returned to service. This test shall be conducted at the time 
of the inspection for certification.
    (j) Cargo hose stored on board the vessel which is used in 
transferring cargoes listed in Table 151.05 shall be inspected every 2 
years. This inspection shall consist of a visual examination and a 
hydrostatic test of 1\1/2\ times the maximum pressure to which the hose 
will be subjected in service. The date of the most recent inspection and 
the test pressure shall be stenciled or otherwise marked on the hose.
    (k) Cargo piping shall be inspected and tested at the same time as 
the cargo tanks.
    (l) If the tank is a pressure vessel type cargo tank with an 
internal inspection interval of 10 years, and is 30 years old or older, 
determined from the date it was built, the owner shall conduct 
nondestructive testing of each

[[Page 156]]

tank in accordance with Sec.  151.04-7, during each internal inspection.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40029, Sept. 29, 1989; CGD 85-061, 54 FR 50965, Dec. 11, 1989; USCG-
2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  151.04-7  Nondestructive testing.

    (a) Before nondestructive testing may be conducted to meet Sec.  
151.04-5 (d) and (l), the owner shall submit a proposal to the Officer 
in Charge, Marine Inspection that includes--
    (1) The test methods and procedures to be used all of which must 
meet section V of the ASME Boiler and Pressure Vessel Code (1986);
    (2) Each location on the tank to be tested; and
    (3) The test method and procedure to be conducted at each location 
on the tank.
    (b) If the Officer in Charge, Marine Inspection rejects the 
proposal, the Officer in Charge, Marine Inspection informs the owner of 
the reasons why the proposal is rejected.
    (c) If the Officer in Charge, Marine Inspection accepts the 
proposal, then the owner shall ensure that--
    (1) The proposal is followed; and
    (2) Nondestructive testing is performed by personnel meeting ASNT 
``Recommended Practice No. SNT-TC-1A (1988), Personnel Qualification and 
Certification in Nondestructive Testing.''
    (d) Within 30 days after completing the nondestructive test, the 
owner shall submit a written report of the results to the Officer in 
Charge, Marine Inspection.

[CGD 85-061, 54 FR 50966, Dec. 11, 1989]



   Subpart 151.05_Summary of Minimum Requirements for Specific Cargoes



Sec.  151.05-1  Explanation of column headings in Table 151.05.

    (a) Cargo identification/name. This column identifies cargoes by 
name. Words in italics are not part of the cargo name but may be used in 
addition to the cargo name. When one entry references another entry by 
use of the word ``see'' and both names are in roman type, either name 
may be used as the cargo name (e.g., ``Diethyl either see Ethyl 
ether''). However, the referenced entry is preferred.
    (b) Cargo identification/pressure. This column identifies cargo in 
terms of pressure within the tank. Terms used are:
    (1) Pressurized. Cargo carried at a pressure in excess of 10 pounds 
per square inch gauge as measured at the top of the tank (i.e., 
exclusive of static head).
    (2) Atmospheric pressure. Cargo carried at not more than 10 pounds 
per square inch gauge, exclusive of static head.
    (c) Cargo identification/temperature. This column identifies the 
cargo by the temperature of the cargo during transit.
    (1) Ambient temperature. Cargo which is carried at naturally 
occurring temperatures.
    (2) Low temperature. Cargo carried below ambient temperatures when 
the product temperature is below 0 [deg]F.
    (3) Elevated temperature. Cargo carried above ambient temperatures.
    (d) Hull type. This column refers to the flotation features of the 
barge. Terms used are explained and defined in Subpart 151.10 of this 
part.
    (e) Cargo segregation/tanks. This column refers to the separation of 
the cargo from its surroundings. Terms are explained in Sec.  151.13-5 
and in footnotes to Table 151.05 of this part.
    (f) Tanks/type. This column refers to the design requirements for 
cargo tanks and their placement within the hull of the vessel. Terms are 
explained in Sec.  151.15-1.
    (g) Tanks/venting. This column refers to arrangements for preventing 
excess pressure or vacuum within the cargo tank. Terms used are 
explained and defined in Sec.  151.15-5.
    (h) Tanks/gauging devices. This column refers to arrangements 
provided for determining the amount of cargo present in cargo tanks. 
Terms used are explained and defined in Sec.  151.15-10.
    (i) Cargo transfer/piping. This column refers to the classification 
of piping in accordance with Subchapter F of this chapter as discussed 
in Sec.  151.20-1.
    (j) Cargo transfer/control. This column refers to the valving 
requirements for the cargo piping system. These requirements are defined 
in Sec.  151.20-5.

[[Page 157]]

    (k) Environmental control/cargo tanks. This column refers to control 
of the composition of the environment within cargo tanks. Definitions 
and detailed requirements are given in Sec.  151.25-1.
    (l) Environmental control/cargo handling space. This column refers 
to control of the environment in the cargo handling spaces. Definitions 
and detailed requirements are found in Sec.  151.25-2.
    (m) Fire protection. This column specifies whether portable fire 
extinguishers are required on barges carrying the cargo named. 
Requirements for cargoes requiring extinguishers are given in Subpart 
151.30 of this part.
    (n) Special requirements. This column refers to requirements in 
subparts 151.40, 151.50, 151.55, 151.56, and 151.58 of this part which 
apply to specific cargoes. The section numbers listed omit the preceding 
part designation, ``151''.
    (o) Electrical hazard class--group. This column lists the electrical 
hazard class and group used for the cargo when determining requirements 
for electrical equipment under subchapter J (Electrical engineering) of 
this chapter.
    (p) Temperature control installations. This column refers to systems 
which are used to control the temperature of the cargo. Definitions and 
requirements which are applicable if such systems are used are given in 
Subpart 151.40 of this part.
    (q) Tank inspection period. This column refers to the maximum period 
in years between internal cargo tank inspections. Applicable 
requirements are given in Sec.  151.04-5.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970; 35 FR 6431, Apr. 22, 1970, as 
amended by CGD 74-275, 40 FR 21958, May 20, 1975; CGD 88-100, 54 FR 
40029, Sept. 29, 19895; CGD 96-041, 61 FR 50731, Sept. 27, 1996; USCG-
2000-7079, 65 FR 67183, Nov. 8, 2000]



Sec.  151.05-2  Compliance with requirements for tank barges carrying
benzene and benzene containing cargoes, or butyl acrylate cargoes.

    A tank barge certificated to carry benzene and benzene containing 
cargoes or butyl acrylate cargoes must comply with the gauging 
requirement of Table 151.05 of this part by August 15, 1998. Until that 
date, a tank barge certificated to carry benzene and benzene containing 
cargoes must meet either the gauging requirement of Table 151.05 or the 
restricted or closed gauging requirements in effect on September 29, 
1994; and a tank barge certificated to carry butyl acrylate cargoes must 
meet either the gauging requirements of Table 151.05 or comply with the 
open, restricted, or closed gauging requirements in effect on September 
29, 1994.

[CGD 95-900, 60 FR 34050, June 29, 1995]

[[Page 158]]

     Table 151.05 to Subpart 151.05 of Part 151--Summary of Minimum 
                              Requirements

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                Cargo identification\1\                                                       Tanks                      Cargo transfer      Environmental
--------------------------------------------------------           Cargo  ---------------------------------------------------------------       control                                              Electrical
                                                          Hull    segre-                                                                 ---------------------    Fire      Special requirements in    hazard      Temp.   Tank internal
                                                          type    gation                                       Gauging   Piping                       Cargo    protection       46 CFR Part 151       class and   control     inspect.
              Cargo name                Pressure  Temp.            tank              Type              Vent    device    class   Control    Cargo    handling   required                                group    install.  period--years
                                                                                                                                            tanks     space
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
a.                                            b.     c.      d.     e.     f.......................       g.        h.       i.       j.        k.         l.         m.   n.......................          o.        p.          q.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetaldehyde..........................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-1     Inert     Vent F        Yes   .55-1(h)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetic acid...........................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-73..................         I-D        NA           G
                                                                    2 i i                                                                                                  .55-1(g)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetic anhydride......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-73..................         I-D        NA           G
                                                                    2 i i                                                                                                  .55-1(g)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetone cyanohydrin...................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                      2 i                                                                                                  .50-70(b)...............
                                                                                                                                                                           .50-73..................
                                                                                                                                                                           .50-81..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acetonitrile..........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acrylic acid..........................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
                                                                                                                                                                           .50-81..................
                                                                                                                                                                           .58-1(a)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Acrylonitrile.........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .55-1(e)................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-70(a)...............
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Adiponitrile..........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV      Open       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Alkylbenzenesulfonic acid (greater        Atmos.  Elev.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-73..................         I-B        NA           G
 than 4%).                                                          2 i i                                                                                                  .58-1(e)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Alkyl(C7-C9) nitrates.................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-81..................          NA        NA           G
                                                                    2 i i                                                                                                  .50-86..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Allyl alcohol.........................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-C        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 159]]

 
Allyl chloride........................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Aluminum sulfate solution.............    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .58-1(e)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Aminoethylethanolamine................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(b)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ammonia, anhydrous....................    Press.   Amb.      II       1NA  Ind. Pressure...........    SR250    Restr.       II      P-2        NR     Vent F         No   .50-30..................         I-D        NA           G
                                                                    2 i i                             p.s.i.                                                               .50-32..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ammonia, anhydrous....................    Atmos.    Low      II       1NA  Ind. Gravity............       PV    Restr.     II-L      G-2        NR     Vent F         No   .50-30..................         I-D      .40-           8
                                                                    2 i i                                                                                                  .50-32..................               1(b)(1)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ammonium bisulfite solution (70% or       Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-73..................          NA        NA           G
 less).                                                               2 i                                                                                                  .56-1(a), (b), (c)......
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ammonium hydroxide (28% or less NH 3).    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .56-1(a), (b), (c), (f),         I-D        NA           G
                                                                      2 i                                                                                                   (g).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Aniline...............................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Anthracene oil (Coal tar fraction)....    Atmos.   Amb.      II     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................         I-D        NA           G
                                                  Elev.             2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Argon, liquefied......................    Press.    Low     III       1NA  Ind. Pressure...........       SR    Restr.     II-L      P-1        NR     Vent F         No   .40-1(a)................          NA  .40-1(a)           G
                                                                      2 i                                                                                                  .50-30..................
                                                                                                                                                                           .50-36..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Benzene...............................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-60..................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Benzene hydrocarbon mixtures              Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-60..................         I-D        NA           G
 (containing Acetylenes) (having 10%                                2 i i                                                                                                  .56-1(b), (d), (f), (g),
 Benzene or more).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Benzene hydrocarbon mixtures (having      Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-60..................         I-D        NA           G
 10% Benzene or more).                                              2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 160]]

 
Benzene, Toluene, Xylene mixtures         Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-60..................         I-D        NA           G
 (having 10% Benzene or more).                                      2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butadiene.............................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-2        NR     Vent F        Yes   .50-70(a)...............         I-B        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butadiene, Butylene mixtures              Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-1        NR     Vent F        Yes   .50-30..................         I-B        NA           G
 (containing Acetylenes).                                           2 i i                                                                                                  .50-70(a)...............
                                                                                                                                                                           .50-73..................
                                                                                                                                                                           .56-1(b), (d), (f), (g).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butyl acrylate (all isomers)..........    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butylamine (all isomers)..............    Atmos.   Amb.      II     1 i i  Ind. Gravity............       PV    Closed       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butyl methacrylate....................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Butyraldehyde (all isomers)...........    Atmos.   Amb.     III       1 i  Integral Gravity........       PV      Open       II      G-1        NR     Vent F        Yes   .55-1(h)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Camphor oil (light)...................    Atmos.   Amb.      II     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Carbolic oil..........................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................          NA        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Carbon dioxide, liquefied.............    Press.    Low     III       1NA  Ind. Pressure...........       SR    Restr.      I-L      P-1        NR     Vent F         No   .50-30..................          NA      .40-           G
                                                                      2 i                                                                                                                                         1(b)(1)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Carbon disulfide......................    Atmos.   Amb.      II       1NA  Ind. Gravity............       PV    Restr.       II      G-1     Inert     Vent F        Yes   .50-40..................         I-A        NA           G
                                                                    2 i i                                                                                                  .50-41..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 161]]

 
Carbon tetrachloride..................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV      Open       II      G-1        NR     Vent N         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cashew nut shell oil (untreated)......    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-2        NR     Vent N        Yes   .50-73..................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Caustic potash solution...............    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
                                                  Elev.               2 i                                                                                                  .55-1(j)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Caustic soda solution.................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
                                                  Elev.               2 i                                                                                                  .55-1(j)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chlorine..............................    Press.   Amb.       I       1NA  Ind. Pressure...........    SR300  Indirect        I      P-2        NR     Vent F         No   .50-30..................          NA        NA           3
                                                                    2 i i                             p.s.i.                                                               .50-31..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chlorobenzene.........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV      Open       II      G-1        NR     Vent N        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chloroform............................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent F         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chlorohydrins (crude).................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
o-Chloronitrobenzene..................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................          NA        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Chlorosulfonic acid...................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           G
                                                                    2 i i                                                                                                  .50-21..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Coal tar naphtha solvent..............    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-73..................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Coal tar pitch (molten)...............    Atmos.  Elev.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-73..................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Creosote..............................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cresols (all isomers).................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cresols with less than 5% Phenol, see
 Cresols (all isomers).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cresols with 5% or more Phenol, see
 Phenol.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 162]]

 
Cresylate spent caustic...............    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-73..................          NA        NA           G
                                                                      2 i                                                                                                  .55-1(b)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cresylic acid, sodium salt solution,
 see Cresylate spent caustic.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Crotonaldehyde........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(h)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cyclohexanone.........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(a), (b)...........         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cyclohexanone, Cyclohexanol mixture...    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(b)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cyclohexylamine.......................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(a), (b), (c), (g).         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Cyclopentadiene, Styrene, Benzene         Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent F        Yes   .50-60..................         I-D        NA           G
 mixture.                                                           2 i i                                                                                                  .56-1(b)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
iso-Decyl acrylate....................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-70(a)...............          NA        NA           G
                                                                      2 i                                                                                                  .50-81(a), (b)..........
                                                                                                                                                                           .55-1(c)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dichlorobenzene (all isomers).........    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(a), (b)...........         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dichlorodifluoromethane...............    Press.   Amb.     III       1NA  Ind. Pressure...........       SR    Restr.       II      P-1        NR         NR         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,1-Dichloroethane....................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 163]]

 
2,2'-Dichloroethyl ether..............    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(f)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dichloromethane.......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   No......................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2,4-Dichlorophenoxy acetic acid,          Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .56-1(a), (b), (c), (g).          NA        NA           G
 diethanolamine salt solution.                                        2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2,4-Dichlorophenoxyacetic acid,           Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .56-1(a), (b), (c), (g).          NA        NA           G
 dimethylamine salt solution.                     Elev.               2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2,4-Dichlorophenoxyacetic acid,           Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .56-1(a), (b), (c), (g).          NA        NA           G
 triisopropanolamine salt solution.                                   2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,1-Dichloropropane...................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,2-Dichloropropane...................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,3-Dichloropropane...................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,3-Dichloropropene...................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dichloropropene, Dichloropropane          Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
 mixtures.                                                          2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2,2-Dichloropropionic acid............    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1       Dry     Vent F        Yes   .50-73..................          NA        NA           G
                                                                      2 i                                                                                                  .58-1(e)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diethanolamine........................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diethylamine..........................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diethylenetriamine....................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 164]]

 
Diethyl ether, see Ethyl ether........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diisobutylamine.......................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diisopropanolamine....................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diisopropylamine......................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
N,N-Dimethylacetamide.................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(b)................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dimethylamine.........................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-2        NR     Vent F        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dimethylethanolamine..................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(b), (c)...........         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dimethylformamide.....................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(e)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,4-Dioxane...........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1     Inert     Vent F        Yes   No......................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Diphenylmethane diisocyanate..........    Atmos.  Elev.      II     1 i i  Integral Gravity........       PV    Closed        I      G-1     Inert     Vent F        Yes   .50-5...................          NA       Yes           G
                                                                      2 i                                                                      Dry                         .56-1(a), (b)...........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Di-n-propylamine......................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dodecyl- dimethyl- amine,                 Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .56-1(b)................          NA        NA           G
 Tetradecyldimethylamine mixture.                                     2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Dodecyl phenol........................    Atmos.   Amb.       I     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-73..................         I-D        NA           2
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 165]]

 
Epichlorohydrin.......................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethanolamine..........................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethyl acrylate........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylamine solution (72% or less).....    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .55-1(b)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
N-Ethylbutylamine.....................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(b)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethyl chloride........................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-2        NR     Vent F        Yes   No......................         I-D        NA           8
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
N-Ethylcyclohexylamine................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(b)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene chlorohydrin.................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene cyanohydrin..................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................          NA        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylenediamine.......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene dibromide....................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene dichloride...................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 166]]

 
Ethylene glycol monoalkyl ethers......    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-C        NA           G
Including:............................                                2 i
2-Ethoxyethanol.......................
Ethylene glycol butyl ether...........
Ethylene glycol tert-butyl ether......
Ethylene glycol ethyl ether...........
Ethylene glycol methyl ether..........
Ethylene glycol n-propyl ether........
Ethylene glycol isopropyl ether.......
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene glycol hexyl ether...........    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene glycol propyl ether..........    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylene oxide........................    Press.   Amb.       I       1NA  Ind. Pressure...........       SR    Restr.       II      P-2     Inert     Vent F        Yes   .50-10..................         I-B  .40-1(c)           4
                                                                    2 i i                                                                                                  .50-12..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethyl ether...........................    Atmos.   Amb.      II       1NA  Ind. Gravity............       PV    Closed       II      G-1     Inert     Vent F        Yes   .50-40..................         I-C        NA           G
                                                                    2 i i                                                                                                  .50-42..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2-Ethylhexyl acrylate.................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethylidene norbornene.................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-5...................          NA        NA           G
                                                                    2 i i                                                                                                  .50-74..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ethyl methacrylate....................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 167]]

 
2-Ethyl-3-propylacrolein..............    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Ferric chloride solutions.............    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           G
                                                                    2 i i                                                                                                  .50-75..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Fluorosilicic acid (30% or less)......    Atmos.   Amb.      II     1 i i  Ind. Gravity............       PV    Closed       II      G-1        NR     Vent F         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-22..................
                                                                                                                                                                           .50-73..................
                                                                                                                                                                           .50-77..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Formaldehyde solution (37% to 50%)....    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .55-1(h)................         I-B        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Formic acid...........................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-73..................         I-D        NA           G
                                                                      2 i                                                                                                  .55-1(i)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Furfural..............................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(h)................         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Glutaraldehyde solution (50% or less).    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Glyoxylic acid solution (50% or less).    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-73..................          NA        NA           G
                                                                    2 i i                                                                                                  .50-81..................
                                                                                                                                                                           .58-1(e)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Hexamethylenediamine solution.........    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Hexamethyleneimine....................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .56-1(b), (c)...........         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Hydrochloric acid.....................    Atmos.   Amb.     III       1NA  Ind. Gravity............     Open      Open       II      G-1        NR     Vent F         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-22..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Hydrofluorosilicic acid (25% or less),
 see Fluorosilicic acid (30% or less).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2-Hydroxyethyl acrylate...............    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................          NA        NA           G
                                                                      2 i                                                                                                  .50-70(a)...............
                                                                                                                                                                           .50-73..................
                                                                                                                                                                           .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 168]]

 
Isoprene..............................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV      Open       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Kraft pulping liquors (free alkali        Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
 content 3% or more) (including:                                      2 i                                                                                                  .56-1(a), (c), (g)......
 Black, Green, or White liquor).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Mesityl oxide.........................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methylacetylene, Propadiene mixture...    Press.   Amb.     III      1 NA  Ind. Pressure...........       SR    Restr.       II      P-2        NR     Vent F        Yes   .50-79..................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methyl acrylate.......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methylamine solution (42% or less)....    Atmos.   Amb.      II       1NA  Ind. Gravity............       PV    Closed       II      G-1        NR     Vent F        Yes   .56-1(a), (b), (c), (g).         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methyl bromide........................    Press.   Amb.       I       1NA  Ind. Pressure...........       SR    Closed        I      P-2        NR     Vent F        Yes   .50-5...................         I-D        NA           2
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methyl chloride.......................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-2        NR     Vent F        Yes   .55-1(c)................         I-D        NA           8
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methylcyclopentadiene dimer...........    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-B        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Methyl diethanolamine.................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .56-1(b), (c)...........         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2-Methyl-5-ethylpyridine..............    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(e)................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 169]]

 
Methyl methacrylate...................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
2-Methylpyridine......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
alpha-Methylstyrene...................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Monochloro- difluoromethane...........    Press.   Amb.     III       1NA  Ind. Pressure...........       SR    Restr.        I      P-1        NR         NR         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Morpholine............................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Motor fuel anti-knock compounds           Atmos.   Amb.       I     1 i i  Ind. Gravity............       PV    Closed        I      G-1        NR     Vent F        Yes   .50-6...................         I-D        NA       .50-6
 (containing lead alkyls).                                          2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nitric acid (70% or less).............    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-73..................
                                                                                                                                                                           .50-80..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nitrobenzene..........................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Nitrogen, liquefied...................    Press.    Low     III       1NA  Ind. Pressure...........       SR    Restr.     II-L      P-1        NR     Vent F         No   .40-1(a)................          NA  .40-1(a)           G
                                                                      2 i                                                                                                  .50-30..................
                                                                                                                                                                           .50-36..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1- or 2-Nitropropane..................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-81..................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
o-Nitrotoluene........................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Octyl nitrates (all isomers), see
 Alkyl(C7-C9) nitrates.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Oleum.................................    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-21..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Pentachloroethane.....................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 170]]

 
1,3-Pentadiene........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Perchloroethylene.....................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   No......................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Phenol................................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           2
                                                                      2 i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Phosphoric acid.......................    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           4
                                                                      2 i                                                                                                  .50-23..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Phosphorus, white (elemental).........    Atmos.  Elev.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1     Water     Vent F        Yes   .50-50..................          NA        NA         4-8
                                                                    2 i i                                                                      Pad
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Phthalic anhydride (molten)...........    Atmos.  Elev.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Polyethylene polyamines...............    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(e)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Polymethylene polyphenyl isocyanate...    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1       Dry     Vent F        Yes   .55-1(e)................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Potassium hydroxide solution, see
 Caustic potash solution.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
iso-Propanolamine.....................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Propanolamine (iso-, n-)..............    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .56-1(b), (c)...........         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Propionic acid........................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-73..................         I-D        NA           G
                                                                    2 i i                                                                                                  .55-1(g)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
iso-Propylamine.......................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .55-1(c)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 171]]

 
Propylene oxide.......................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Restr.       II      P-1     Inert     Vent F        Yes   .50-10..................         I-B        NA           G
                                                                    2 i i                                                                                                  .50-13..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
iso-Propyl ether......................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1     Inert     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Pyridine..............................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(e)................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium aluminate solution (45% or         Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
 less).                                           Elev.               2 i                                                                                                  .56-1(a), (b), (c)......
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium chlorate solution (50% or less)    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-73..................          NA        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium dichromate solution (70% or        Atmos.   Amb.      II     1 i i  Integral Gravity........     Open    Closed       II      G-1        NR     Vent N         No   .50-5(d)................          NA        NA           G
 less).                                                             2 i i                                                                                                  .50-73..................
                                                                                                                                                                           .56-1(b), (c)...........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium hydroxide solution, see Caustic
 soda solution.
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium hypochlorite solution (20% or      Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .50-73..................          NA        NA           G
 less).                                                             2 i i                                                                                                  .56-1(a), (b)...........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium sulfide, hydrosulfide solutions    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-73..................          NA        NA           G
 (H2S 15ppm or less).                                                 2 i                                                                                                  .55-1(b)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium sulfide, hydrosulfide solutions    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .50-73..................          NA        NA           G
 (H2S greater than 15ppm but less than                                2 i                                                                                                  .55-1(b)................
 200ppm).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium sulfide, hydrosulfide solutions    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F         No   .50-73..................          NA        NA           G
 (H2S greater than 200ppm).                                           2 i                                                                                                  .55-1(b)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sodium thiocyanate solution (56% or       Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .58-1(a)................          NA        NA           G
 less).                                                               2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 172]]

 
Styrene monomer.......................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sulfur (molten).......................    Atmos.  Elev.     III       1 i  Integral Gravity........     Open      Open       II      G-1    Vent N     Vent N        Yes   .50-55..................         I-C      .40-           G
                                                                    2 i i                                                                                                                                         1(f)(1)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sulfur dioxide........................    Press.   Amb.       I       1NA  Ind. Pressure...........       SR    Closed  .......      P-2        NR     Vent F         No   .50-30..................          NA        NA           2
                                                                    2 i i                                                                                                  .50-84..................
                                                                                                                                                                           .55-1(j)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sulfuric acid.........................    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-21..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Sulfuric acid, spent..................    Atmos.   Amb.     III     1 i i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N         No   .50-20..................         I-B        NA           4
                                                                    2 i i                                                                                                  .50-21..................
                                                                                                                                                                           .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,1,2,2-Tetrachloroethane.............    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   No......................          NA        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Tetraethylenepentamine................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(c)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Tetrahydrofuran.......................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(b)...............         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Toluenediamine........................    Atmos.  Elev.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-73..................          NA        NA           G
                                                                      2 i                                                                                                  .56-1(a), (b), (c), (g).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Toluene diisocyanate..................    Atmos.   Amb.       I     1 i i  Integral Gravity........       PV    Closed        I      G-1       Dry     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                      N 2                         .55-1(e)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
o-Toluidine...........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Closed       II      G-1        NR     Vent F        Yes   .50-5...................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-73..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,2,4-Trichlorobenzene................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   No......................         I-D        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 173]]

 
1,1,2-Trichloroethane.................    Atmos.   Amb.     III     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .50-73..................         I-D        NA           G
                                                                      2 i                                                                                                  .56-1(a)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Trichloroethylene.....................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   No......................         I-D        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1,2,3-Trichloropropane................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-73..................         I-D        NA           G
                                                                      2 i                                                                                                  .56-1(a)................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triethanolamine.......................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(b)................         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triethylamine.........................    Atmos.   Amb.      II     1 i i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .55-1(e)................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triethylenetetramine..................    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR     Vent N        Yes   .55-1(b)................         I-C        NA           G
                                                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Triphenylborane (10% or less), Caustic    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .56-1(a), (b), (c)......          NA        NA           G
 soda solution.                                                       2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Trisodium phosphate solution..........    Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
                                                  Elev.               2 i                                                                                                  .56-1(a), (c)...........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Urea, Ammonium nitrate solution           Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F         No   .56-1(b)................         I-D        NA           G
 (containing more than 2% NH 3).                                      2 i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Valeraldehyde (all isomers)...........    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1     Inert     Vent F        Yes   No......................         I-C        NA           G
                                                                    2 i i
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Vanillan black liquor (free alkali        Atmos.   Amb.     III       1 i  Integral Gravity........     Open      Open       II      G-1        NR         NR         No   .50-73..................          NA        NA           G
 content 3% or more).                                                 2 i                                                                                                  .56-1(a), (c), (g)......
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Vinyl acetate.........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV      Open       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Vinyl chloride........................    Press.   Amb.      II       1NA  Ind. Pressure...........       SR    Closed       II      P-2        NR     Vent F        Yes   .50-30..................         I-D        NA           8
                                                                    2 i i                                                                                                  .50-34..................
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Vinyl chloride........................    Atmos.    Low      II       1NA  Ind. Gravity............       PV    Closed     II-L      G-2        NR     Vent F        Yes   .50-30..................         I-D      .40-           8
                                                                    2 i i                                                                                                  .50-34..................               1(b)(1)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[[Page 174]]

 
Vinylidene chloride...................    Atmos.   Amb.      II       1NA  Ind. Gravity............       PV    Closed       II      P-2    Padded     Vent F        Yes   .55-1(f)................         I-D        NA           G
                                                                    2 i i                                                                                                  .50-70(a)...............
                                                                                                                                                                           .50-81(a), (b)..........
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Vinyltoluene..........................    Atmos.   Amb.     III       1 i  Integral Gravity........       PV    Restr.       II      G-1        NR     Vent F        Yes   .50-70(a)...............         I-D        NA           G
                                                                    2 i i                                                                                                  .50-81..................
                                                                                                                                                                           .56-1(a), (b), (c), (g).
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
For requirements see these sections in  ........  .....   .10-1    .13- 5  .15- 1..................    .15-5   .15- 10   .20- 1   .20- 5     .25-1      .25-2        .30   ........................     111.105       .40     .04- 5
 Part 151:.                                                                                                                                                                                               (Sub-
                                                                                                                                                                                                     chapter J)
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
See Table 2 of Part 153 for additional cargoes permitted to be carried by tankbarge.
Terms and symbols:
Segregation--Tank--
 Line 1--Segregation of cargo from surrounding waters:
 i = Skin of vessel (single skin) only required. Cargo tank wall can be vessel's hull.
 i i = Double skin required. Cargo tank wall cannot be vessel's hull.
 Line 2--Segregation of cargo space from machinery spaces and other spaces which have or could have a source of ignition:
 i = Single bulkhead only required. Tank wall can be sole separating medium.
 i i = Double bulkhead required. Cofferdam, empty tank, pumproom, tank with Grade E Liquid (if compatible with cargo) is satisfactory.
Internal tank inspection--
 G--Indicates cargo is subject to general provisions of 151.04-5(b).
 Specific numbers in this column are changes from the general provisions.
Abbreviations used:
Tank type: Ind = Independent.
Vent:
 PV = Pressure vacuum valve.
 SR = Safety relief.
Gauging device: Restr. = Restricted.
General usage:
 NR = No requirement.
 NA = Not applicable.
1. The provisions contained in 46 CFR Part 197, subpart C, apply to liquid cargoes containing 0.5% or more benzene by volume.


[USCG-2000-7079, 65 FR 67183, Nov. 8, 2000]

[[Page 175]]



           Subpart 151.10_Barge Hull Construction Requirements



Sec.  151.10-1  Barge hull classifications.

    (a) Each barge constructed or converted in conformance with this 
subpart shall be assigned a hull type number.
    (1) Effective dates for certain requirements:
    (i) Barges constructed or converted between July 1, 1964, and June 
1, 1970, in accordance with the construction requirements of Sec. Sec.  
32.63 and 98.03 of this chapter are considered to comply with the basic 
provisions of this subpart and will retain the hull type classification 
for the service for which they were originally approved. Changes in 
product endorsement will not be considered a change in service, except 
when a change to a product of higher specific gravity necessitates a 
reevaluation of the intact and damage stability requirements in subpart 
E of part 172 of this chapter.
    (2) [Reserved]
    (b) For this purpose the barge hull types shall be defined as 
follows:
    (1) Type I barge hull. Barge hulls classed as Type I are those 
designed to carry products which require the maximum preventive measures 
to preclude the uncontrolled release of the cargo. These barges are 
required to meet:
    (i) Standards of intact stability and a modified two compartment 
standard of subdivision and damage stability, as specified in subpart E 
of part 172 of this chapter; and
    (ii) Hull structural requirements, including an assumed grounding 
condition.
    (2) Type I-S (special) barge hulls. Type I-S (special) barge hulls 
are those constructed or converted for the carriage of chlorine in bulk 
prior to July 1, 1964, and modified to higher stability standards prior 
to July 1, 1968, but not meeting the requirements for full Type I 
classification.
    (3) Type II barge hull. Barge hulls classed as Type II are those 
designed to carry products which require significant preventive measures 
to preclude the uncontrolled release of the cargo. These barges are 
required to meet:
    (i) Standards of intact stability and a modified one compartment 
standard of subdivision and damage stability, as specified in subpart E 
of part 172 of this chapter; and
    (ii) Hull structural requirements, including an assumed grounding 
condition.
    (4) Type III barge hull. Barge hulls classed as Type III are those 
designed to carry products of sufficient hazard to require a moderate 
degree of control. These barges are required to meet:
    (i) Standards of intact stability as specified in subpart E of part 
172 of this chapter; and
    (ii) Hull structural requirements.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 79-023, 48 FR 
51008, Nov. 4, 1983; CGD 88-100, 54 FR 40040, Sept. 29, 1989]



Sec.  151.10-5  Subdivision and stability.

    Each barge must meet the applicable requirements in subchapter S of 
this chapter.

[CGD 70-023, 48 FR 51009, Nov. 4, 1983]



Sec.  151.10-15  Certificate endorsement.

    (a)-(b) [Reserved]
    (c) Certificate endorsement. The following information shall be 
submitted, and upon approval of calculations shall form part of the 
endorsement on the Certificate of Inspection:
    (1) Limiting draft for each hull type service for which approval is 
requested.
    (2) Maximum density (lb./gal.) and maximum cargo weight (tons) for 
each tank for which approval is requested. Their weights will normally 
reflect uniform loading except that for trim purposes the individual 
tank cargo weight may exceed the uniform loading tank cargo weight, 
corresponding to the barge fresh water deadweight at the limiting draft, 
by 5 percent. Where a greater degree of nonuniform loading is desired, 
longitudinal strength calculations shall be submitted.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 79-023, 48 FR 
51009, Nov. 4, 1983]



Sec.  151.10-20  Hull construction.

    (a) Construction features. (1) Each barge hull shall be constructed 
with a suitable bow form (length, shape, and height of headlog) to 
protect against diving at the maximum speed at which the barge is 
designed to be towed. In

[[Page 176]]

any integrated tow, only the lead barge need comply with this 
requirement.
    (2) All ``open hopper'' type barges shall be provided with coamings 
around the hopper space and a 36-inch minimum height plowshare 
breakwater on the forward rake. The plowshare breakwater may be omitted, 
if it is demonstrated to the satisfaction of the Commandant that 
sufficient protection is achieved without it. Coamings shall have a 
minimum height of 36 inches forward and may be graduated to a minimum 
height of 24 inches at midlength and 18 inches thereafter. All hopper 
barges constructed with a weathertight rain shield over the hopper space 
are exempt from these requirements, except that they shall be provided 
with an 18-inch minimum coaming all around the hopper.
    (3) All ``open hopper'' type barges modified for the carriage of 
chlorine in bulk shall be provided with 36-inch minimum height coamings 
around the hopper.
    (4) All barges in ocean or coastwise service shall be provided with 
a structural deck and hatches in accordance with the applicable 
provisions of subchapter E of this chapter and the scantling 
requirements of the American Bureau of Shipping.
    (b) Hull structural requirements. (1) All Types I, II, and III 
barges shall comply with the basic structural requirements of the 
American Bureau of Shipping for barges of the ordinary types and the 
applicable supplementary requirements of this section.
    (2) Types I and II barges in inland service: A grounding condition 
shall be assumed where the forward rake bulkhead rests upon a pinnacle 
at the water surface. The maximum hull and tank bending moment and tank 
saddle reactions (if applicable) shall be determined. The hull bending 
stress shall not exceed the applicable limits of paragraphs (b)(2) (i), 
(ii), or (iii) of this section. The maximum tank bending moment and 
saddle reaction shall be used in the tank design calculations required 
by Sec.  151.15-2(b)(3).
    (i) Independent tanks supported by only two saddles do not 
contribute to the strength and stiffness of the barge hull. In such 
case, the hull stress shall not exceed either 50 percent of the minimum 
ultimate tensile strength of the material or 70 percent of the yield 
strength when specified, whichever is greater.
    (ii) Independent tanks supported by three or more saddles contribute 
to the strength and stiffness of the hull. In such case, the hull stress 
shall not exceed the percentage stress values prescribed in Sec.  
151.10-20(b)(2)(i), multiplied by the quantity

(1.5-SWT/UTS),

where SWT is the stress calculated without including the effect of the 
          tanks, and UTS is the minimum ultimate tensile strength of the 
          material. The value SWT, however, shall in no case be more 
          than 75 percent of UTS.

    (iii) Integral tanks may be considered as contributing to the 
strength and stiffness of the barge hull. The hull stresses for integral 
tank barges shall not exceed the percentage stress values prescribed in 
paragraph (b)(2)(i), of this section.
    (3) Types I and II barges in ocean service:
    (i) Independent tank barges with tanks supported by three or more 
saddles shall be subjected to a 0.6L\0.6\ trochoidal wave hogsag 
analysis to determine the maximum hull and tank bending moments and tank 
saddle reactions.
    (ii) All independent tank barges, regardless of the number of saddle 
supports shall be subject to a still water bending analysis to determine 
the hull bending moment. For those barges with independent tanks 
supported by three or more saddles, this analysis shall consider tank-
hull interaction so as to determine tank bending moments and saddle 
reactions.
    (iii) The still water tank bending moments and saddle reactions 
shall be superimposed upon those obtained by simultaneous application of 
the following dynamic loadings:
    (a) Rolling 30[deg] each side (120[deg] full cycle) in 10 seconds.
    (b) Pitching 6[deg] half amplitude (24[deg] full cycle) in 7 
seconds.
    (c) Heaving L/80 half amplitude (L/20 full cycle) in 8 seconds.
    (iv) The hull structure and saddle support system shall be analyzed, 
using the maximum hull bending moments and saddle reactions obtained 
from the

[[Page 177]]

foregoing. Bending stress shall not exceed 60 percent of the yield 
strength or 42 percent of the minimum tensile strength of the material, 
whichever is less. Critical buckling strength shall be at least 75 
percent greater than calculated buckling stresses. The maximum tank 
bending moments and saddle reactions shall be used in the tank design 
calculations required by Sec.  151.15-3(b)(8).



   Subpart 151.12_Equipment and Operating Requirements for Control of 
                  Pollution From Category D NLS Cargoes

    Source: CGD 81-101, 52 FR 7777, Mar. 12, 1987, unless otherwise 
noted.



Sec.  151.12-5  Equipment for Category D NLS.

    The Coast Guard endorses the Certificate of Inspection and for ships 
making foreign voyages issues the endorsed NLS Certificate required by 
Sec.  151.12-10 for an oceangoing non-self-propelled ship to carry as 
bulk cargo the following Category D NLSs if the ship meets the 
requirements of this part and the requirements applying to ships that 
carry Category D NLS cargoes in Sec. Sec.  153.470, 153.486, and 153.490 
of this chapter:

Acetic acid
Acrylic acid
Adiponitrile
Aminoethylethanolamine
Ammonium bisulfite solution
Butyl methacrylate
Caustic soda solution
Coal tar pitch
Cyclohexanone
Cyclohexanone, Cychexanol mixture
Dichloromethane
2,2-Dichloropropionic acid
Diethylenetriamine
N,N-Dimethylacetamide
Dimethylethanolamine
Dimethylformamide
1,4-Dioxane
Ethanolamine
N-Ethylcyclohexylamine
Ethylene cyanohydrin
Ethylene glycol monoalkyl ethers
Ethyl methacrylate
Formic acid
Glutaraldehyde solution
Glyoxylic acid solution (50% or less)
Hydrochloric acid
Mesityl oxide
Methyl methacrylate
Morpholine
1- or 2-Nitropropane
Phosphoric acid
Polyethylene polyamines
Polymethylene polyphenyl isocyanate
Propionic acid
iso-Propyl ether
Pyridine
Tetraethylenepentamine
Tetrahydrofuran
Triethanolamine
Triethylenetetramine

[CGD 81-101, 52 FR 7777, Mar. 12, 1989, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989; CGD 92-100, 59 FR 17028, Apr. 11, 1994; CGD 94-
900, 59 FR 45139, Aug. 31, 1994; CGD 94-902, 60 FR 34043, June 29, 1995; 
USCG-2000-7079, 65 FR 67196, Nov. 8, 2000]



Sec.  151.12-10  Operation of oceangoing non-self-propelled ships
Carrying Category D NLS.

    (a) An oceangoing non-self-propelled ship may not carry in a cargo 
tank a Category D NLS cargo listed under Sec.  151.12-5 unless the ship 
has on board a Certificate of Inspection and for ships making foreign 
voyages an NLS Certificate endorsed under that section to allow the 
cargo tank to carry the NLS cargo.
    (b) The person in charge of an oceangoing non-self-propelled ship 
that carries a Category D NLS listed under Sec.  151.12-5 shall ensure 
that the ship is operated as prescribed for the operation of oceangoing 
ships carrying Category D NLSs in Sec. Sec.  153.901, 153.909, 153.1100, 
153.1102, 153.1104, 153.1106, 153.1124, 153.1126, 153.1128, 153.1130 and 
153.1132 of this chapter.

[CGD 81-101, 52 FR 7777, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28974, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



                    Subpart 151.13_Cargo Segregation



Sec.  151.13-1  General.

    This subpart prescribes the requirements for cargo segregation for 
cargo tanks. These requirements are based on considerations of cargo 
reactivity, stability, and contamination of the surroundings and other 
cargoes.

[CGD 88-100. 54 FR 40029, Sept. 29, 1989, as amended by CGD 96-041, 61 
FR 50731, Sept. 27, 1996]

[[Page 178]]



Sec.  151.13-5  Cargo segregation--tanks.

    (a) The configurations listed in this paragraph refer to the 
separation of the cargo from its surroundings and list the various 
degrees of segregation required. Paragraphs and (2) of this section 
explain the symbols used in lines 1 and 2, in order, under the tank 
segregation column of Table 151.05.
    (1) Segregation of cargo from surrounding waters (Line 1 of Table 
151.05).

i = Skin of vessel (single skin) only required. Cargo tank wall can be 
vessel's hull.
ii = Double skin required. Cargo tank wall cannot be vessel's hull.
NA = Nonapplicable for this case. Independent tanks already have such 
segregation built in through design.

    (2) Segregation of cargo space from machinery spaces and other 
spaces which have or could have a source of ignition (Line 2 of Table 
151.05).

i = Single bulkhead only required. Tank wall can be sole separating 
medium.
ii = Double bulkhead, required. Cofferdam, empty tank, pumproom, tank 
with Grade E Liquid (if compatible with cargo) is satisfactory.

    (b) [Reserved]
    (c) If a cofferdam is required for segregation purposes and a 
secondary barrier is required for low temperature protection by Sec.  
151.15-3(d)(4), the void space between the primary and secondary 
barriers shall not be acceptable in lieu of the required cofferdam.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 75-59, 45 FR 
70273, Oct. 23, 19805; CGD 96-041, 61 FR 50731, Sept. 27, 1996]



                          Subpart 151.15_Tanks



Sec.  151.15-1  Tank types.

    This section lists the definitions of the various tank types 
required for cargo containment by Table 151.05.
    (a) Integral. A cargo containment envelope which forms a part of the 
vessel's hull in which it is built, and may be stressed in the same 
manner and by the same loads which stress the contiguous hull structure. 
An integral tank is essential to the structural completeness of its 
vessel's hull.
    (b) Independent. A cargo containment envelope which is not a 
contiguous part of the hull structure. An independent tank is built and 
installed so as to eliminate, wherever possible (or, in any event, to 
minimize) its stressing as a result of stressing or motion of the 
adjacent hull structure. In general, therefore, motion of parts of the 
tank relative to the adjacent hull structure is possible. An independent 
tank is not essential to the structural completeness of its carrying 
vessel's hull.
    (c) Gravity. Tanks having a design pressure (as described in Part 54 
of this chapter) not greater than 10 pounds per square inch gauge and of 
prismatic shape or other geometry where stress analysis is neither 
readily nor completely determinate. (Integral tanks are of the gravity 
type.)
    (d) Pressure. Independent tanks whose design pressure (as described 
in Part 54 of this chapter) is above 10 pounds per square inch gauge and 
fabricated in accordance with part 54, of this chapter. Independent 
gravity tanks which are of normal pressure vessel configuration (i.e., 
bodies of revolution, in which the stresses are readily determinate) 
shall be classed as pressure vessel type tanks even though their maximum 
allowable working pressure is less than 10 pounds per square inch gauge. 
Pressure vessel tanks shall be of Classes I, I-L, II, II-L, or III, as 
defined in subchapter F of this chapter.



Sec.  151.15-3  Construction.

    This section lists the requirements for construction of the types of 
cargo tanks defined in Sec.  151.15-1.
    (a) Gravity type tanks. Gravity type cargo tanks vented at a 
pressure of 4 pounds per square inch gauge or less shall be constructed 
and tested as required by standards established by the American Bureau 
of Shipping or other recognized classification society. Gravity type 
tanks vented at a pressure exceeding 4 but not exceeding 10 pounds per 
square inch gauge will be given special consideration by the Commandant.
    (b) Pressure vessel type tanks. Pressure vessel type tanks shall be 
designed and tested in accordance with the requirements of Part 54 of 
this chapter.

[[Page 179]]

    (1) Uninsulated cargo tanks, where the cargo is transported, at or 
near ambient temperatures, shall be designed for a pressure not less 
than the vapor pressure of the cargo at 115 [deg]F. The design shall 
also be based on the minimum internal pressure (maximum vacuum), plus 
the maximum external static head to which the tank may be subjected.
    (2) When cargo tanks, in which the cargo is transported at or near 
ambient temperature, are insulated with an insulation material of a 
thickness to provide a thermal conductance of not more than 0.075 B.t.u. 
per square foot per degree Fahrenheit differential in temperature per 
hour, the tanks shall be designed for a pressure of not less than the 
vapor pressure of the cargo at 105 [deg]F. The insulation shall also 
meet the requirements of paragraph (f) of this section.
    (3) Cargo tanks in which the temperature is maintained below the 
normal atmospheric temperature by refrigeration or other acceptable 
means shall be designed for a pressure of not less than 110 percent of 
the vapor pressure corresponding to the temperature of the liquid at 
which the system is maintained, or the pressure corresponding to the 
greatest dynamic and static loads expected to be encountered in service. 
For mechanically stressed relieved cargo tanks, additional factors 
relating design pressure and maximum allowable pressure shall be as 
specified by the Commandant. The material of the tank shall meet the 
material requirements specified in part 54 of this chapter for the 
service temperature, and this temperature shall be permanently marked on 
the tank as prescribed in Sec.  54.10-20 of this chapter.
    (4) The maximum allowable temperature of the cargo is defined as the 
boiling temperature of the liquid at a pressure equal to the setting of 
the relief valve.
    (5) 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.

tz=tw-0.25(tw-tB)

where:
tz = 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.


Under normal circumstances, only temperatures due to refrigerated 
service will be considered in determining the service temperature. 
Refrigerated service for purposes of this paragraph is defined as 
service where the temperature is controlled in the process rather than 
being caused by atmospheric conditions.
    (6) Heat transmission studies, where required, shall assume the 
minimum ambient temperatures of 0 [deg]F still air and 32 [deg]F still 
water, and maximum ambient temperatures of 115 [deg]F still air and 90 
[deg]F still water.
    (7) Where applicable, the design of the cargo tanks shall 
investigate the thermal stresses induced in the tanks at the service 
temperature.
    (8) Calculations showing the stress level in the tanks under dynamic 
loading conditions for ocean service barges (see Sec.  151.10-20(b)(4)) 
and grounding conditions for inland service barges (see Sec.  151.10-20-
(b)(2)) shall be submitted to the Commandant for approval. These 
calculations shall take into account the local stresses due to the 
interaction between the barge hull and the tanks.
    (c) High density cargo. Cargoes with a specific gravity greater than 
that for which the scantlings of the tank are designed may be carried 
provided that:
    (1) The maximum cargo weight (tons) in a specific tank does not 
exceed the maximum cargo weight (tons) endorsed on the certificate of 
inspection.
    (2) The scantlings of the tank are sufficient to prevent rupture 
under a full head of the higher density cargo. Scantlings meeting 
ordinary bulkhead requirements for the full head will satisfy this 
requirement.
    (d) Arrangements--(1) Collision protection. (i) Tanks containing 
cargoes which are required to be carried in Type I hulls by Table 151.05 
shall be located a minimum of 4 feet inboard from the side shell and box 
end of the vessel. Tanks containing cargoes which are required to be 
carried in Type II

[[Page 180]]

hulls by Table 151.05 shall be located a minimum of 3 feet inboard from 
the side shell and box end of the vessel.
    (ii) All independent cargo tanks installed on Type I or Type II 
barge hulls shall be protected with suitable collision chocks or 
collision straps. A longitudinal collision load of one and one half 
times the combined weight of the tank and the cargo shall be assumed. 
All other independent cargo tanks shall be provided with suitable 
collision chocks or collision straps assuming a longitudinal collision 
load equal to the combined weight of the tank and the cargo. The design 
bearing stress shall not exceed 2 times the yield strength or 1.5 times 
the minimum ultimate strength, whichever is less.
    (iii) Tanks containing cargoes, which are required to be carried in 
Type I or Type II hulls by Table 151.05, shall be located a minimum of 
25 feet from the head log at the bow. Box barges and trail barges need 
not comply with this requirement.
    (2) Inspection clearances. The distance between tanks or between a 
tank and the vessel's structure shall be such as to provide adequate 
access for inspection and maintenance of all tank surfaces and hull 
structure; but shall not normally be less than 15 inches except in way 
of web frames or similar major structural members where the minimum 
clearance shall be equal to the flange or faceplate width.
    (3) Access openings. Each tank shall be provided with at least a 
15 x 18 diameter manhole, fitted with a cover 
located above the maximum liquid level as close as possible to the top 
of the tank. Where access trunks are fitted to tanks, the diameter of 
the trunks shall be at least 30 inches.
    (4) Low temperature protection. (i) When low temperature cargoes are 
to be carried in gravity type tanks at a temperature lower than that for 
which the hull steel is adequate, a secondary barrier designed to 
contain leaked cargo temporarily shall be provided. The design of the 
cargo containment system shall be such that under normal service 
conditions, or upon failure of the primary tank, the hull structure 
shall not be cooled down to a temperature which is unsafe for the 
materials involved. The secondary barrier and structural components of 
the hull which may be exposed to low temperatures shall meet the 
material requirements (i.e., chemistry and physical properties) 
specified in part 54 of this chapter for the service temperature 
involved. Heat transmission studies and tests may be required to 
demonstrate that the structural material temperatures in the hull are 
acceptable.
    (ii) The design shall take into consideration the thermal stresses 
induced in the cargo tank at the service temperature during loading.
    (iii) Where necessary, devices for spray loading or other methods of 
precooling or cooling during loading shall be included in the design.
    (iv) Pressure-vessel type tanks shall be radiographed in accordance 
with the requirements of part 54 of this chapter. For gravity type 
tanks, all weld intersections or crossings in joints of primary tank 
shells shall be radiographed for a distance of 10 thicknesses from the 
intersection. All other welding in the primary tank and in the secondary 
barrier, shall be spot radiographed in accordance with the requirements 
specified in part 54 of this chapter for Class II-L pressure vessels.
    (v) For nonpressure vessel type containment systems, access shall be 
arranged to permit inspection one side each of the primary tank and 
secondary barrier, under normal shipyard conditions. Containment systems 
which, because of their peculiar design, cannot be visually inspected to 
this degree, may be specially considered provided an equivalent degree 
of safety is attained.
    (e) Installation of cargo tanks. (1) Cargo tanks shall be supported 
on foundations of steel or other suitable material and securely anchored 
in place to prevent the tanks from shifting when subjected to external 
forces. Each tank shall be supported so as to prevent the concentration 
of excessive loads on the supporting portions of the shell or head.
    (2) Foundations, and stays where required, shall be designed for 
support and constraint of the weight of the full tank, and the dynamic 
loads imposed thereon. Thermal movement shall also be considered.

[[Page 181]]

    (3) Foundations and stays shall be suitable for the temperatures 
they will experience at design conditions.
    (4) Cargo tanks may be installed ``on deck,'' ``under deck,'' or 
with the tanks protruding through the deck. All tanks shall be installed 
with the manhole openings located in the open above the weather deck. 
Provided an equivalent degree of safety is attained, the Commandant may 
approve cargo tanks installed with manhole openings located below the 
weather deck. Where a portion of the tank extends above the weather 
deck, provision shall be made to maintain the weathertightness of the 
deck, except that the weathertightness of the upper deck need not be 
maintained on:
    (i) Vessels operating on restricted routes which are sufficiently 
protected; or,
    (ii) Open hopper type barges of acceptable design.
    (5) No welding shall be performed on tanks which require and have 
been stress relieved unless authorized by the Commandant.
    (f) Materials. (1) Materials used in the construction of cargo tanks 
shall be suitable for the intended application and shall be in 
accordance with the applicable requirements of part 54 of this chapter. 
For cargoes carried at low temperatures, the tank supports and 
foundations, and portions of the hull which may be exposed to low 
temperature, shall also meet the applicable requirements of that part.
    (2) When required, cargo tanks shall be lined with rubber or other 
material acceptable to the Commandant. The interior surfaces of the 
cargo tanks shall be made smooth, welds chipped or ground smooth, and 
the surfaces thoroughly cleaned before the lining is applied. The lining 
material shall be resistive to attack by the cargo, not less elastic 
than the metal of the tank proper, and nonporous when tested after 
application. It shall be of substantially uniform thickness. The lining 
shall be directly bonded to the tank plating, or attached by other 
satisfactory means acceptable to the Commandant.
    (g) Insulation. (1) Insulation, when provided, shall be compatible 
with the cargo and the tank materials.
    (2) Insulation in a location exposed to possible high temperature or 
source of ignition shall be one of the following:
    (i) Incombustible, complying with the requirements of Subpart 
164.009 of Part 164 of this chapter; or
    (ii) Fire retardant, having a flame spread rating of 50 or less as 
determined by ASTM Specification E 84 (incorporated by reference, see 
Sec.  151.01-2) (Tunnel Test); or,
    (iii) Nonburning or ``self-extinguishing'' as determined by ASTM 
Specification D 4986, ``Horizontal Burning Characteristics of Cellular 
Polymeric Materials'' (incorporated by reference, see Sec.  151.01-2) 
and covered by a steel jacket having a minimum thickness of 18 gauge 
(0.0428 inches) (U.S. Standard Gauge) or an equivalent means of 
protection acceptable to the Commandant.
    (3) Insulation in a location protected against high temperature or 
source of ignition need satisfy no requirement for combustibility.
    (4) Insulation shall be impervious to water vapor, or have a vapor-
proof coating of a fire-retardant material acceptable to the Commandant. 
Unless the vapor barrier is inherently weather resistant, tanks exposed 
to the weather shall be fitted with a removable sheet metal jacket of 
not less than 18 gauge over the vapor-proof coating and flashed around 
all openings so as to be weathertight. Insulation which is not exposed 
to the weather when installed on tanks carrying cargoes above ambient 
temperatures need not be impervious to water vapor nor be covered with a 
vapor-proof coating.
    (5) Insulation shall be adequately protected in areas of possible 
mechanical damage.
    (h) Fire exposure protection. Tanks which are provided with fire 
exposure protection of one of the following categories may be allowed a 
reduction in the size of relief valves.
    (1) Approved incombustible insulation meeting the requirements of 
subpart 164.007 of part 164 of this chapter which is secured to the tank 
with steel bands.
    (2) Located in a hold or protected by a self-supporting steel jacket 
or cover (such as a hopper cover) of at least 10 gauge (0.1345) for 
insulation.

[[Page 182]]

    (i) Tanks not protected against fire exposure as described in this 
paragraph shall not be permitted a reduction in size of relief valves.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989; USCG-1999-5151, 64 FR 67183, Dec. 1, 1999; USCG-
2000-7790, 65 FR 58463, Sept. 29, 2000]



Sec.  151.15-5  Venting.

    This section contains definitions and requirements for the various 
methods of venting specified in Table 151.05. In addition to the 
requirement that all vents must penetrate into tanks at the top of the 
vapor space, the following methods of venting and the applicable 
restrictions are listed:
    (a) Open venting. A venting system which offers no restriction 
(except pipe losses and flame screen, where used) to the movement of 
liquid or vapor to or from the cargo tank (via the vent) under normal 
operating conditions. The total cross-sectional area of the vents shall 
not be less than the total cross-sectional area of the filling pipe or 
pipes. Ullage openings may be counted as part of the required cross-
sectional area: Provided, That each cargo tank has at least one 
permanent vent. The minimum size of a cargo tank vent shall be not less 
than 2\1/2\ inches. The outlet end of the vent shall terminate in a 
gooseneck bend and shall be located at a reasonable height above the 
weather deck, clear of all obstructions. No shut-off valve or frangible 
disk shall be fitted in the vent lines except that a float check valve 
may be installed so as to exclude the entry of water into the tank 
(i.e., to prevent downflooding). An open venting system may be fitted 
with a flame screen.
    (b) Pressure-vacuum venting. A normally closed venting system fitted 
with a device to automatically limit the pressure or vacuum in the tank 
to design limits. Pressure-vacuum relief valves shall comply with the 
requirements of subpart 162.017 of this chapter. The required capacity 
of the venting system shall be in accordance with part 54 of this 
chapter.
    (c) Safety relief venting. A closed venting system fitted with a 
device to automatically limit the pressure in the tank to below its 
maximum allowable working pressure. The maximum safety relief valve 
setting shall not exceed the maximum allowable working pressure of the 
tank. For cargoes carried at ambient temperatures, the minimum safety 
relief valve setting shall correspond to the saturated vapor pressure of 
the cargo at 105 [deg]F if carried in an insulated tank, or 115 [deg]F 
if carried in an uninsulated tank. For cargoes carried below ambient 
temperature, the safety relief valve setting shall be selected to 
provide a suitable margin between normal operating pressure of the tank 
and the opening pressure of the valve but in no case shall it exceed the 
maximum allowable working pressure of the tank. The safety relief valves 
shall be of a type approved under subparts 162.001 or 162.018 of 
subchapter Q of this chapter. The required capacity of the safety relief 
valves shall be in accordance with the requirements of part 54 of this 
chapter.
    (d) Rupture disks. (1) When required by the nature of the cargo, 
rupture disks may be installed in lieu of or in addition to other 
pressure limiting devices in accordance with the requirements of Sec.  
54.15-13 of this chapter.
    (2) When a pressure-vacuum relief valve or safety relief valve 
normally protected by a rupture disk or breaking pin device is exposed 
to the cargo due to breakage of the disk, the valve shall be reinspected 
before being returned to service.



Sec.  151.15-6  Venting piping.

    (a) The back pressure in the relief valve discharge lines shall be 
taken into account when determining the flow capacity of the relief 
valve to be used. The back pressure in the discharge line shall be 
limited to 10 percent of the valve operating pressure or a compensating-
type valve shall be used. Suitable provision shall be made for draining 
condensate which may accumulate in the vent piping.
    (b) [Reserved]



Sec.  151.15-10  Cargo gauging devices.

    This section contains definitions and requirements for types of 
gauging devices specified in Table 151.05.
    (a) Open gauging. A gauging method which uses an opening in the 
cargo tank and which may expose the gauge

[[Page 183]]

user to the cargo and its vapors. Examples of this type are gauge hatch, 
ullage hole.
    (b) Restricted. A gauging device which penetrates the cargo tank and 
which, in operation, causes or permits the release to the atmosphere of 
small quantities of cargo vapor or liquid. The amount of cargo released 
is controlled by the small diameter of the tank penetration opening and 
by a locally operated valve or similar closure device in that opening. 
When not in use, this type gauging device is closed to maintain the 
complete integrity of cargo containment. Examples of this type are 
rotary tube, fixed tube, slip tube, sounding tube. (See Sec. Sec.  
151.03-49 and 151.15-10(g).)
    (c) Closed. A gauging device which penetrates the cargo tank, but 
which is part of a closed system maintaining the complete integrity of 
cargo containment. This device is designed and installed so as not to 
release cargo liquid or vapor in any amount to the atmosphere. Examples 
of this type are automatic float, continuous tape (magnetic coupled), 
sight glass (protected), electronic probe, magnetic, differential 
pressure cell.
    (d) Isolated or indirect. A gauging method or device which is 
isolated from the tank (no penetration of the tank shell) and which may 
employ an indirect measurement to obtain the desired quantity. Examples 
of this type are weighing of cargo, sonic depth gauge (without 
penetration of tank shell), pipe flow meter.
    (e) All gauging devices and related fixtures which form a part of 
the cargo containment barrier shall be of suitable material and shall be 
designed for the pressure and temperature of the cargo in accordance 
with the requirements of Subchapter F of this chapter.
    (f) Use of restricted gauging devices. (1) When required in Table 
151.05, cargoes carried under pressure shall have restricted gauging 
devices designed so that the maximum bleed valve opening is not larger 
than 0.055;inch; diameter, unless provided with an excess flow valve. 
Sounding tubes are prohibited for use with cargoes having a vapor 
pressure in excess of 14.7 p.s.i.a. at 115 [deg]F, if carried in an 
uninsulated tank, or at 105 [deg]F, if carried in an insulated tank.
    (2) When utilizing a sounding tube, the cargo tank vent system shall 
be designed to prevent the discharge of cargo through the sounding tube 
due to pressure build up in the cargo tank vapor space. (See Sec.  
151.03-43) When cargoes carried at atmospheric pressure are required to 
have a restricted gauging device, open gauges may be provided in 
addition to restricted gauges for this type of cargo. However, open 
gauges may not be used while cargo transfer operations are actually 
being performed.
    (g) Fixed tube gauges are not acceptable as primary means of 
gauging. They may be used as a check on the calibration of other gauging 
devices.
    (h) For pressure-vessel type tanks, each automatic float, continuous 
reading tape or similar type gauge not mounted directly on the tank or 
dome shall be fitted with a shutoff device located as close to the tank 
as practicable. When an automatic float gauging device, which gauges the 
entire height of the tank, is used, a fixed tube gauge set in the range 
of 85 percent to 90 percent of the water capacity of the tank shall be 
provided in addition as a means of checking the accuracy of the 
automatic float gauge, or other alternate means acceptable to the 
Commandant may be used.
    (i) Gauge glasses of the columnar type are prohibited.
    (j) Flat sight glasses may be used in the design of automatic float 
continuous reading tape gauges. However such glasses shall be made of 
high strength material, suitable for the operating temperatures, of not 
less than one-half inch in thickness and adequately protected by a metal 
cover.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by USCG-2005-22329, 
70 FR 57183, Sept. 30, 2005]



                      Subpart 151.20_Cargo Transfer



Sec.  151.20-1  Piping--general.

    (a) Cargo piping systems shall be arranged and fabricated in 
accordance with this section and Subchapter F. The class of piping 
system required for a specific cargo shall be as listed in Table 151.05 
as a minimum; however, a

[[Page 184]]

higher class may be required when the actual service temperature or 
pressure so dictates. See Table 56.04-2 of this chapter.
    (b) Piping system components shall be suitable for use with the 
cargoes for which the barge is certificated, and shall be of materials 
listed in Subchapter F of this chapter, or such other material as the 
Commandant may specifically approve. All piping materials shall be 
tested in accordance with the requirements of Subchapter F of this 
chapter. The valve seat material, packing, gaskets, and all other 
material which comes into contact with the cargo shall be resistant to 
the chemical action of the cargoes for which the barge is certificated.
    (c) Cargo piping systems, when subject to corrosive attack of the 
cargo, and when serving cargo tanks which are required by this 
subchapter to be lined or coated, shall be constructed of, lined or 
coated with corrosion-resistant material. Vent systems shall be 
similarly constructed, lined, or coated up to and including the vent 
control device.
    (d) All piping systems components shall have a pressure rating at 
operating temperature (according to the applicable American National 
Standards Institute, Inc., pressure/temperature relations) not less than 
the maximum pressure to which the system may be subjected. Piping which 
is not protected by a relief valve, or which can be isolated from its 
relief valve, shall be designed for the greatest of:
    (1) The cargo vapor pressure at 115 [deg]F.
    (2) The maximum allowable working pressure of the cargo tank.
    (3) The pressure of the associated pump or compressor relief valve.
    (4) The total discharge head of the associated pump or compressor 
where a discharge relief valve is not used.

The escape from cargo piping system relief valves shall be run to 
venting system or to a suitable recovery system. Provisions shall be 
made for pressure relief of all piping, valves, fittings, etc., in which 
excessive pressure build-up may occur because of an increase in product 
temperature.
    (e) Provisions shall be made by the use of offsets, loops, bends, 
expansion joints, etc., to protect the piping and tank from excessive 
stress due to thermal movement and/or movements of the tank and hull 
structure. Expansion joints shall be held to a minimum and where used 
shall be subject to individual approval by the Commandant.
    (f) Low temperature piping shall be isolated from the hull 
structure. Where necessary, arrangements to provide for the protection 
of the hull structure from leaks in low temperature systems in way of 
pumps, flanges, etc., shall be provided.
    (g) Connections to tanks shall be protected against mechanical 
damage and tampering. Underdeck cargo piping shall not be installed 
between the outboard side of cargo containment spaces and the skin of 
the barge, unless provision is made to maintain the minimum inspection 
and collision protection clearances (where required) between the piping 
and the skin. Cargo piping which is external to tanks, and is installed 
below the weather deck shall be joined by welding, except for flanged 
connections to shutoff valves and expansion joints.
    (h) Piping shall enter independent cargo tanks above the 
weatherdeck, either through or as close to the tank dome as possible.
    (i) Horizontal runs of cargo piping on integral tank barges may be 
run above or below the weatherdeck. When run below the weatherdeck, the 
following are applicable:
    (1) Horizontal runs located entirely within integral cargo tanks 
shall be fitted with a stop valve, located inside the tank that is being 
serviced and operable from the weatherdeck. There shall be cargo 
compatibility in the event of a piping failure.
    (2) Horizontal runs of cargo piping installed in pipe tunnels may 
penetrate gravity type tanks below the weatherdeck: Provided, That each 
penetration is fitted with a stop valve operable from the weatherdeck. 
If the tunnel is directly accessible from the weatherdeck without 
penetrating the cargo tank, the stop valve shall be located on the 
tunnel side. If the tunnel is not accessible from the weatherdeck, the 
valve shall be located on the tank side of the penetration.

[[Page 185]]

    (3) The tunnel shall comply with all tank requirements for 
construction, location, ventilation, and electrical hazard. There shall 
be cargo compatibility in the event of a piping failure.
    (4) The tunnel shall have no other openings except to the 
weatherdeck or a cargo pumproom.



Sec.  151.20-5  Cargo system valving requirements.

    For the purpose of adequately controlling the cargo, both under 
normal operating and casualty conditions, every cargo piping system 
shall be provided with one of the following sets of control valves and 
meet the requirements listed below. Cargo tanks, whether gravity or 
pressure vessel type, for cargoes having a saturated vapor pressure of 
10 pounds per square inch gauge or less at 115 [deg]F (105 [deg]F if the 
tank is insulated) shall be provided with a valving system designated as 
Gravity-1. Cargo tanks, whether gravity or pressure vessel type, for 
cargoes which are carried below ambient temperature and whose vapor 
pressure is maintained at 10 pounds per square inch gauge or below shall 
be provided with a valving system designated as Gravity-2. Cargo tanks 
for cargoes which have vapor pressures above 10 p.s.i.g. at 115 [deg]F 
(105 [deg]F if tank is insulated) shall be provided with a valving 
system designated as Pressure-1. Cargo tanks for cargoes which have 
vapor pressures above 10 pounds per square inch gauge at 115 [deg]F (105 
[deg]F if tank is insulated) and which require greater protection due to 
their hazardous characteristics shall be provided with a valving system 
designated as Pressure-2. The requirements of paragraphs (a) through (d) 
of this section for stop valves or excess flow valves to be fitted at 
tank penetrations are not applicable to nozzles at which pressure vacuum 
or safety relief valves are fitted.
    (a) Gravity-1 (G-1). (1) One manually operated stop valve shall be 
installed on each tank filling and discharge line, located near the tank 
penetration.
    (2) One stop valve or blind flange shall be installed at each cargo 
hose connection. When a cargo hose connection is in use, it shall be 
provided with a stop valve; which may be part of the vessel's equipment 
or may be part of the shore facility and attached to the barge end of 
the loading hose. When a cargo hose connection is not in use, it may be 
secured with a blind flange.
    (3) If individual deepwell pumps are used to discharge the contents 
of each cargo tank, and the pumps are provided with a remote shutdown 
device, a stop valve at the tank is not required on the tank discharge 
line.
    (b) Gravity-2 (G-2). (1) One manually operated stop valve shall be 
installed on each tank penetration, located as close as possible to the 
tank.
    (2) One remote operated, quick closing shut-off valve shall be 
installed at each cargo hose connection.
    (3) A remote shutdown device shall be installed for all cargo 
handling machinery.
    (c) Pressure-1 (P-1). (1) One manually operated stop valve and one 
excess flow valve shall be installed on each tank penetration, located 
as close as possible to the tank.
    (2) One manually operated stop valve shall be installed at each 
cargo hose connection, when in use.
    (d) Pressure-2 (P-2). (1) One manually operated stop valve and one 
excess flow valve shall be installed at each tank penetration, located 
as close as possible to the tank.
    (2) One remote operated quick closing shutoff valve shall be 
installed at each cargo hose connection when in use.
    (3) No tank penetration shall be less than 1 inch diameter.
    (e) Cargo tank penetrations which are connections for gauging or 
measuring devices need not be equipped with excess flow or remote 
operated quick closing valves provided that the opening is constructed 
so that the outward flow of tank contents shall not exceed that passed 
by a No. 54 drill size (0.055-inch diameter).
    (f) The control system for any required quick closing shutoff valves 
shall be such that the valves may be operated from at least two remote 
locations on the vessel; if means of fire protection is required by 
Table 151.05, the control system shall also be provided with fusible 
elements designed to melt between 208 [deg]F and 220 [deg]F, which will 
cause the quick closing shutoff valves to close in case of fire. Quick

[[Page 186]]

closing shutoff valves shall be of the fail-closed (closed on loss of 
power) type and be capable of local manual operation. Quick closing 
shutoff valves shall operate from full open to full closed under all 
service conditions in not more than 10 seconds, without causing 
excessive pressure surges.
    (g) Excess flow valves, where required, shall close automatically at 
the rated closing flow of vapor or liquid as tested and specified by the 
manufacturer. The piping, including fittings, valves, and appurtenances 
protected by an excess flow valve, shall have a greater capacity than 
the rated closing flow of the excess flow valve. Excess flow valves may 
be designed with a bypass not to exceed 0.040-inch diameter opening to 
allow equalization of pressure, after an operating shutdown.
    (h) Suitable means shall be provided to relieve the pressure and 
remove liquid contents from cargo lines and hoses to the cargo tank or 
other safe location prior to effecting disconnections.



Sec.  151.20-10  Cargo system instrumentation.

    (a) Each tank operated at other than ambient temperature shall be 
provided with at least one remote reading temperature sensor located in 
the liquid phase of the cargo. The temperature gauge shall be located at 
the cargo handling control station or another approved location.
    (b) Where required, each tank equipped with safety relief valves 
shall be fitted with a pressure gauge which shall be located at the 
cargo handling control station or at another approved location.



Sec.  151.20-15  Cargo hose if carried on the barge.

    (a) Liquid and vapor line hose used for cargo transfer shall be of 
suitable material resistant to the action of the cargo. Hose shall be 
suitable for the temperatures to which it may be subjected and shall be 
acceptable to the Commandant.
    (b) Hose subject to tank pressure, or the discharge pressure of 
pumps or vapor compressors, shall be designed for a bursting pressure of 
not less than 5 times the maximum safety relief valve setting of the 
tank, pump, or compressor, whichever determines the maximum pressure to 
which the hose may be subjected in service.
    (c) Each new type of cargo hose, complete with end fittings, shall 
be prototype tested to a pressure not less than five times its specified 
maximum working pressure. The hose temperature during this prototype 
test shall duplicate the intended extreme service temperature. 
Thereafter, each new length of cargo hose produced shall be 
hydrostatically tested at ambient temperature to a pressure not less 
than twice its maximum working pressure nor more than two-fifths its 
bursting pressure. The hose shall be marked with its maximum working 
pressure, and if used in other than ambient temperature service, its 
maximum or minimum temperature.



Sec.  151.20-20  Cargo transfer methods.

    (a) Cargo transfer may be accomplished by means of gravity, pumping, 
vapor or gas pressurization, or fluid displacement unless otherwise 
provided in Subpart 151.50 of this part.
    (b) Vapor or gas pressurization may be used only in transferring 
cargo from pressure vessel type cargo tanks. The pressurizing vapor or 
gas lines shall be provided with safety relief device in the lines set 
to open at a pressure no greater than 90 percent of the set pressure of 
the cargo tank safety relief valve. The pressurizing line shall be 
fitted with a stop valve at the tank, and a check valve to prevent the 
accidental release of cargo through the pressure line.
    (c) Fluid displacement is permitted with either gravity or pressure 
vessel type cargo tanks. The displacing fluid shall enter the tank under 
low relative pressure. The fluid entry line shall be fitted with a 
safety relief valve set to lift at a pressure no higher than 80 percent 
of the cargo tank safety relief valve setting.
    (d) When cargo vapors are flammable, combustible or toxic, cargo 
filling lines entering the top of the tank shall lead to a point at or 
near the bottom. Spray filling lines, discharging near the top of the 
tank, may be fitted in lieu of, or in addition to, the above cargo 
filling lines.

[[Page 187]]



                  Subpart 151.25_Environmental Control



Sec.  151.25-1  Cargo tank.

    When carrying certain commodities regulated by this subchapter, one 
of the following types of cargo protection may be required, within the 
main cargo tank, and in some cases, in the space between the primary and 
secondary barriers.
    (a) Inerted. All vapor spaces within the cargo tank are filled and 
maintained with a gas or vapor which will not support combustion and 
which will not react with the cargo.
    (b) Padded. All vapor spaces within the cargo tanks are filled and 
maintained with a liquid, gas (other than air), or vapor which will not 
react with the cargo.
    (c) Ventilated (forced). Vapor space above the liquid surface in the 
tank is continuously swept with air by means of blowers or other 
mechanical devices requiring power.
    (d) Ventilated (natural). Vapor space above the liquid surface in 
the tank is continuously swept with atmospheric air without the use of 
blowers or other mechanical devices requiring power (e.g., ``chimney-
effect'' ventilation).
    (e) Dry. All vapor space within the cargo tank is filled and 
maintained with a gas or vapor containing no more than 100 ppm water.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.25-2  Cargo handling space.

    Pump rooms, compressor rooms, refrigeration rooms, heating rooms, 
instrument rooms or other closed spaces regularly entered by operating 
personnel, in which work is performed on the cargo or in which the cargo 
movement is locally controlled, may be required to be fitted with one of 
the following types of ventilation:
    (a) Forced ventilation. The forced ventilation system shall be 
designed to insure sufficient air movement through these spaces to avoid 
the accumulation of toxic or flammable vapors and to insure sufficient 
oxygen to support life, and, in any event, the ventilation system shall 
have a minimum capacity sufficient to permit a change of air every 3 
minutes.
    (b) Natural ventilation. The natural ventilation system shall be 
designed to insure sufficient air movement to avoid the accumulation of 
toxic or flammable vapors and to insure sufficient oxygen to support 
life.



               Subpart 151.30_Portable Fire Extinguishers



Sec.  151.30-1  Type.

    When required by Table 151.05, approved portable fire extinguishers 
shall be installed in accordance with Subpart 34.50 of this chapter. The 
fire extinguishing media shall be dry chemical or other suitable agent 
for all locations.



      Subpart 151.40_Temperature or Pressure Control Installations



Sec.  151.40-1  Definitions.

    This section defines the various methods by which the cargo may be 
heated or cooled.
    (a) Boiloff. Cargo pressure and temperatures are maintained by 
permitting the cargo to boil naturally and the cargo vapor thus 
generated removed from the tank by venting.
    (b) External cargo cooling--(1) Cargo vapor compression. A 
refrigeration system in which the cargo vapors generated within the tank 
are withdrawn, compressed, and the lower energy vapor or its condensate 
returned to the tank.
    (2) External heat exchange. A refrigeration system in which the 
cargo vapor or liquid is cooled outside the cargo tanks by being passed 
through a heat exchanger. Refrigeration is not accomplished by direct 
compression of the cargo.
    (c) Internal heat exchange. A refrigeration system in which a 
cooling fluid is passed through heat transfer coils immersed in the 
cargo tank liquid or vapor phases.
    (d) Tank refrigeration. A refrigeration system in which the cooling 
fluid is passed around the cargo tank exterior in order to remove heat 
from the tank or its surroundings.

[[Page 188]]

    (e) No refrigeration. A system that allows the liquefied gas to warm 
up and increase in pressure. The insulation and tank design pressure 
shall be adequate to provide for a suitable margin for the operating 
time and temperatures involved.
    (f) Tank heating. (1) A system in which the cargo is heated by means 
of steam or other heat transfer fluid running through coils within or 
around the tank. The cargo itself does not leave the tank.
    (2) A recirculating system in which the cargo leaves the tank, is 
pumped through a heater and then returned to the tank.



Sec.  151.40-2  Materials.

    Materials used in the construction of temperature or pressure 
control systems shall be suitable for the intended application and meet 
the requirements of Subchapter F and the Special Requirements section of 
this subchapter.



Sec.  151.40-5  Construction.

    Construction of machinery or equipment, such as heat exchangers, 
condensers, piping, etc., associated with temperature or pressure 
control systems shall meet the requirements of Subchapter F of this 
chapter. The electrical portions of these installations shall meet the 
requirements of Subchapter J of this chapter.



Sec.  151.40-10  Operational requirements.

    Control systems, required by Table 151.05 shall be provided with an 
audible or visual high cargo temperature or high cargo pressure alarm 
which is discernible at the towboat. The alarm shall operate when either 
the pressure or the temperature exceeds the operating limits of the 
system. The alarm may monitor either pressure or temperature, but must 
be independent of the control system.



Sec.  151.40-11  Refrigeration systems.

    (a) Boiloff systems. The venting of cargo boiloff to atmosphere 
shall not be used as a primary means of temperature or pressure control 
unless specifically authorized by the Commandant.
    (b) Vapor compression, tank refrigeration, and secondary 
refrigeration systems: The required cooling capacity of refrigeration 
systems shall be sufficient to maintain the cargo at design operating 
conditions with ambient temperature of 115 [deg]F still air and 90 
[deg]F still water. The number and arrangement of compressors shall be 
such that the required cooling capacity of the system is maintained with 
one compressor inoperative. Portions of the system other than the 
compressors need not have standby capacity.



                        Subpart 151.45_Operations



Sec.  151.45-1  General.

    (a) Barges certificated as tank barges (Subchapter D of this 
chapter) or cargo barges (Subchapter I of this chapter) for the carriage 
of cargoes regulated by this subchapter shall meet all applicable 
requirements for operations in the appropriate subchapter; in addition, 
requirements prescribed in this subpart shall apply to either type of 
certification.
    (b) [Reserved]



Sec.  151.45-2  Special operating requirements.

    (a) The requirements of this section shall apply to all barges 
carrying in bulk any cargoes regulated by this subchapter; however, the 
provisions of this section are not applicable to such barges when empty 
and gas-freed.
    (b) When it is necessary to operate box or square-end barges as lead 
barges of tows, the person in charge of the towing vessel shall control 
the speed to insure protection against diving and swamping of such 
barges, having due regard to their design and freeboard, and to the 
operating conditions.
    (c) No cargo tank hatch, ullage hole, or tank cleaning openings 
shall be opened or remain open except under the supervision of the 
person in charge, except when the tank is gas free.
    (d) Barges, when tendered to the carrier for transportation, shall 
have all bilges and void spaces (except those used for ballasting) 
substantially free of water. Periodic inspections and necessary pumping 
shall be carried out to insure maintenance of such water-free condition 
in order to minimize the free surface effects, both in longitudinal and 
transverse directions. Except when

[[Page 189]]

otherwise considered necessary for inspection or pumping, all hatch 
covers and other hull closure devices for void spaces and hull 
compartments other than cargo spaces shall be closed and secured at all 
times.
    (e) Cargo signs and cards. (1) Warning signs shall be displayed on 
the vessel, port and starboard, facing outboard without obstructions, at 
all times except when the vessel is gas free. The warning sign shall be 
rectangular and a minimum of 3 feet wide and 2 feet high. It shall be of 
sufficient size to accommodate the required alerting information, which 
shall be shown in black block style letters and numerals (characters) at 
least 3 inches high on a white background. The minimum spacing between 
adjacent words and lines of characters shall be 2 inches. The minimum 
spacing between adjacent characters shall be one-half inch. All 
characters shall have a minimum stroke width of one-half inch and shall 
be a minimum of 2 inches wide, except for the letters ``M'' and ``W'', 
which shall be a minimum of 3 inches wide, and except for the letter 
``I'' and the Numeral ``1'', which may be \1/2\-inch wide. The signs 
shall have a 2-inch minimum white border clear of characters. The signs 
shall be maintained legible. The alerting information shall include the 
following:

                                 Warning

                             Dangerous Cargo

    (This sign may be covered or removed when Subchapter O commodities 
are not being carried.)

                               No Visitors

                               No Smoking

    (This sign may be removed or covered when the commodity is not 
flammable or combustible.)

                             No Open Lights

    (This sign may be removed or covered when the commodity is not 
flammable or combustible.)

    (2)(i) Names and locations of all cargoes will be displayed in a 
readily discernible manner on all barges carrying one or more 
commodities regulated by this subchapter. This may be an individual sign 
at or on each tank or by a single sign similar to the following example:

 
                            Tank No.                              Cargo
 
IP.............................................................   /xxxx/
ISec............................................................   /xxxx/
2P.............................................................   /xxxx/
2Sec............................................................   /xxxx/
 


These signs may be printed, handwritten, permanent or changeable, but be 
visible and readable at all times. These signs should be as readable, as 
those specified in paragraph (e)(1) of this section. Cargoes regulated 
by other subchapters will be included whenever carried simultaneously 
with commodities regulated by this subchapter.
    (ii) When the dangerous cargo barge is carrying only a single 
product, the Warning Sign required by paragraph (e)(1) of this section 
can be considered as meeting the requirements for the cargo location 
sign. The name of the commodity shall be added to the Warning Sign.
    (3) A cargo information card for each cargo regulated by this 
subchapter shall be carried on the bridge or in the pilot house of the 
towing vessel, readily available for use by the person in charge of the 
watch. This information card shall also be carried aboard the barge, 
mounted near the Warning Sign required by paragraph (e)(1) of this 
section, in such position as to be easily read by a man standing on the 
deck of the barge. The minimum card size shall be 7 x 9\1/
2\. The card shall have legible printing on one side only. 
The card shall be laminated in clear plastic or otherwise made 
weatherproof. The following data shall be listed:
    (i) Cargo identification and characteristics. Identification of the 
cargo, as listed in Table 151.05, its appearance and odor. A statement 
of the hazards involved and instructions for the safe handling of the 
cargo and, as applicable, the need for special cargo environments.
    (ii) Emergency procedures. Precautions to be observed in the event 
of spills, leaks, or equipment or machinery breakdown and/or 
uncontrolled release of the cargo into the waterway or atmosphere. 
Precautions to be observed in the event of exposure of personnel to 
toxic cargoes.

[[Page 190]]

    (iii) Firefighting procedures. Precautions to be observed in the 
event of a fire occurring on or adjacent to the barge, and enumeration 
of firefighting media suitable for use in case of a cargo fire.
    (f) Surveillance. During the time the cargo tanks contain any amount 
of liquid or gaseous dangerous cargoes requiring Type I or Type II barge 
hulls, the barge shall be under surveillance, as set forth in this 
paragraph:
    (1) The licensed operator, person in command, and mate of a vessel 
towing a tank barge that need not be manned, and each of them, shall be 
responsible for monitoring the security and integrity of the tank barge 
and for ensuring adherence to proper safety precautions. These 
responsibilities include, but are not limited to--
    (i) Ensuring that every tank barge added to the tow has all tank 
openings properly secured; has its freeing-ports and scuppers, if any, 
unobstructed; meets any loadline or freeboard requirements; and neither 
leaks cargo into the water, voids, or cofferdams nor leaks water into 
the tanks, voids, or cofferdams;
    (ii) Ensuring that every tank barge in the tow is properly secured 
within the tow;
    (iii) Ensuring that periodic checks are made of every tank barge in 
the tow for leakage of cargo into the water, voids, or cofferdams and 
for leakage of water into the tanks, voids, or cofferdams;
    (iv) Knowing the cargo of every tank barge in the tow, all hazards 
associated with the cargo, and what to do on discovery of a leak;
    (v) Ensuring that the crew of the vessel know the cargo of every 
tank barge in the tow, all hazards associated with the cargo, and what 
to do on discovery of a leak;
    (vi) Reporting to the Coast Guard any leaks from a tank barge in the 
tow into the water, as required by 33 CFR 151.15; and
    (vii) Ensuring that the crew of the vessel and other personnel in 
the vicinity of the tank barges in the tow follow the proper safety 
precautions for tank vessels, and that no activity takes place in the 
vicinity of the barges that could create a hazard.
    (2) A towing vessel engaged in transporting such unmanned barges 
shall not leave them unattended. When a barge is moored, but not gas 
free, it shall be under the care of a watchman who may be a member of 
the complement of the towing vessel, or a terminal employee, or other 
person. This person shall be responsible for the security of the barge 
and for keeping unauthorized persons off the barge. Such person shall be 
provided with, read, and have in his possession for ready reference the 
information cards required by paragraph (e) of this section.
    (g) All cargo hatches shall be closed, dogged down, or otherwise 
tightly secured.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989; CGD 79-116, 60 FR 17158, Apr. 4, 1995]



Sec.  151.45-3  Manning.

    Except as provided for in this section, barges need not be manned 
unless in the judgment of the Officer in Charge, Marine Inspection, such 
manning is necessary for the protection of life and property and for 
safe operation of the vessel. Vessels requiring manning for safe 
operation shall be subject to additional requirements as determined by 
the Commandant. Towing vessels, while towing barges which are not 
required to be manned, shall be provided with and have on board the 
information card required by Sec.  151.45-2(e)(3). This card shall be in 
the possession of the master or person in charge.



Sec.  151.45-4  Cargo-handling.

    (a) On a United States tank barge subject to inspection--
    (1) The owner and operator of the vessel, and his or her agent, and 
each of them, shall ensure that no transfer of liquid cargo in bulk or 
cleaning of a cargo tank takes place unless under the supervision of a 
qualified person designated as the person in charge of the transfer or 
the cleaning under Subpart C of 33 CFR part 155.
    (2) The person in charge of the transfer shall ensure that enough 
qualified personnel are on duty to safely transfer liquid cargo in bulk 
or to safely clean cargo tanks.
    (b) Closing of sea and ballast valves. All sea and ballast valves 
are to be

[[Page 191]]

properly aligned and lashed, or sealed in their correct position prior 
to beginning cargo transfer operations. Under no circumstances shall 
such valves be secured by locks.
    (c) Connecting for cargo transfer. (1) Movement of the vessel shall 
be considered when making the cargo connections to insure safe cargo 
transfer. Suitable material shall be used in joints and in couplings 
when making connections to insure that they are tight. Under no 
circumstances shall less than three bolts be used in a bolted flanged 
coupling.
    (2) When cargo connections are supported by the vessel's tackle, the 
person in charge of the transfer operations shall inspect the vessel to 
insure that sufficient tackles are used.
    (3) Pans or buckets shall be placed under cargo hose connections.
    (4) Cargo transfer operations for any cargo requiring a PV or safety 
relief venting device in Table 151.05 shall be performed with cargo 
hatch covers closed.
    (d) Inspection prior to transfer of cargo. Prior to the transfer of 
cargo, the person in charge of the transfer operation shall inspect the 
barge and other cargo equipment to assure himself that the following 
conditions exist:
    (1) The Certificate of Inspection is endorsed for the products to be 
loaded. Loading restrictions, if any, should be noted.
    (2) Warning signs are displayed as required.
    (3) Cargo information cards for the product are aboard.
    (4) No repair work in way of cargo space is being carried out.
    (5) Cargo connections and hatch covers conform with the provisions 
of paragraph (c) of this section and cargo valves are properly set.
    (6) All connections for cargo transfer have been made to the 
vessel's fixed pipeline system.
    (7) In transferring flammable or combustible cargoes, there are no 
fires or open flames present on the deck, or in any compartment which is 
located on, facing, open or adjacent to the part of the deck on which 
cargo connections have been made.
    (8) The shore terminal or other tank vessel concerned has reported 
itself in readiness for transfer of cargo.
    (9) All sea valves are properly set and those connected to the cargo 
piping are closed.
    (10) When transferring flammable or combustible cargoes that a 
determination was made as to whether or not boiler and/or galley fires 
can be maintained with reasonable safety.
    (e) Duties of the person in charge during transfer operations. The 
person in charge of the transfer operations shall control the operations 
as follows:
    (1) Supervise the operation of the cargo system valves.
    (2) Start transfer of cargo slowly.
    (3) Observe cargo connections and hose for leakage.
    (4) Observe operating pressure on cargo systems.
    (5) Comply with loading limitations placed on the vessel by the 
Certificate of Inspection, if, any, for the purpose of not overloading 
individual tanks or the vessel.
    (6) Observe the loading rate for the purpose of avoiding overflow of 
the tanks.
    (f) Cargo transfer operations shall not be started or, if started, 
shall be discontinued under the following conditions:
    (1) During severe electrical storms.
    (2) If a fire occurs on the barge, the wharf or in the immediate 
vicinity.
    (3) If potentially dangerous leakage occurs.
    (g) No vessel shall come alongside or remain alongside a barge in 
way of its cargo tanks while it is transferring cargo unless the 
conditions then prevailing are mutually acceptable to the persons in 
charge of cargo handling.
    (h) Auxiliary steam, air, fuel, or electric current. When 
discharging cargo from one or more barges, the towing vessel may furnish 
steam, air, fuel, or electric current for pumps on barges or dock, but 
in no case shall the cargo pass through or over the towing vessel.
    (i) Termination of transfer operations. When transfer operations are 
completed, the valves on cargo connections on the vessel shall be 
closed. The cargo connections shall be drained of cargo.
    (j) Transfer of other cargo or stores on a barge. (1) Packaged 
goods, freight,

[[Page 192]]

and ship's stores shall not be loaded or discharged during the loading 
of flammable cargoes except by permission of the person in charge of the 
transfer operation. Explosives shall not be loaded or carried on any 
barge containing products regulated by this subchapter.
    (2) Where package and general cargo is carried directly over bulk 
cargo tanks, it shall be properly dunnaged to prevent chafing of metal 
parts and securely lashed or stowed.
    (k) Transportation of other cargo or stores on barges. Barges may be 
permitted to transport deck cargoes directly over bulk cargo spaces when 
the nature of such deck cargoes and the methods of loading and unloading 
same do not create an undue hazard. Such barges shall have their decks 
properly dunnaged to prevent chafing between the steel parts of the 
vessel and the deck cargo.
    (l) Deck construction must be adequate to support the intended load. 
Provisions for carrying deck cargo shall be endorsed on the Certificate 
of Inspection by the Officer in Charge, Marine Inspection.
    (m) Emergencies. In case of emergencies, nothing in the regulations 
in this subchapter shall be construed as preventing the person in charge 
of transfer operations from pursuing the most effective action in his 
judgment for rectifying the conditions causing the emergency.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970; 35 FR 6431, Apr. 22, 1970, as 
amended by CGD 75-59, 45 FR 70273, Oct. 23, 1980; CGD 81-059, 54 FR 151, 
Jan. 4, 1989; CGD 79-116, 60 FR 17158, Apr. 4, 1995]



Sec.  151.45-5  Open hopper barges.

    (a) All open hopper barges not constructed or modified in 
conformance with the provisions of Subpart 151.10 of this part when 
carrying in bulk any cargoes regulated by this subchapter shall meet the 
provisions of this section. However, the provisions of this section are 
not applicable to such barges when empty (not necessarily cleaned or 
gas-freed).
    (1) Except as otherwise provided in this section, no such open 
hopper type barge shall be placed as lead barge in any tow. These barges 
shall be placed in protected positions within the tow so that the danger 
from diving or swamping will be minimized. Where, due to operating 
conditions, compliance with this paragraph is impossible, the provisions 
of paragraph (a)(3) of this section apply. The person in charge of the 
towing vessel shall be responsible for compliance with this paragraph.
    (2) No such open hopper type barge shall be moved from a loading 
facility unless all void spaces and bilges are substantially free of 
water. Periodic inspections and necessary pumping shall be carried out 
to insure the maintenance of such water-free conditions, in order to 
minimize the free surface effect in both the longitudinal and transverse 
directions. Except when considered necessary for inspection or pumping, 
all hatch covers and other hull closure devices for void spaces and hull 
compartments shall be closed and secured at all times. In the case of 
unmanned barges, the person in charge of the towing vessel shall be 
deemed to be in charge of the barge, and all requirements to be carried 
out on the barge shall be carried out by or under the direction of this 
person.
    (3) When an open hopper type barge is in an exposed position, such 
that protection from swamping provided by adjoining barges cannot be 
obtained from the location within the tow, it shall be the 
responsibility of the person in charge of the towing vessel to control 
speed so as to insure protection against diving and swamping of the 
barge, having regard to its design and freeboard, and other operating 
conditions.
    (b) To show that special operating requirements apply to a specific 
open hopper type barge, additional placards or signs shall be displayed 
in at least four different locations on the barge when the cargoes 
subject to this part are carried in any form in the cargo tanks. The 
placards or signs shall be posted on the barge approximately amidships 
on each side and near the centerline fore and aft facing outboard. 
Racks, or other suitable means for mounting such placards or signs, 
shall be so arranged as to provide clear visibility and shall be 
protected from becoming readily damaged or obscured. The placards or 
signs shall be at least

[[Page 193]]

equal in dimensions to the DOT standard tank car ``Dangerous'' placard 
(10\3/4\ inches square or larger) and shall display a circle (10 inches 
in diameter or larger) with alternating quadrants of white and red, and 
so mounted that the red quadrants are centered on the vertical axis. The 
shipper and/or owner of the barge shall be responsible for the 
installation of the required placards or signs, including maintenance of 
them while such barge is in temporary storage with cargo aboard. The 
person in charge of the towing vessel shall be responsible for the 
continued maintenance of the placards or signs while such barge is in 
transit.



Sec.  151.45-6  Maximum amount of cargo.

    (a) Tanks carrying liquids or liquefied gases at ambient 
temperatures regulated by this subchapter shall be limited in the amount 
of cargo loaded to that which will avoid the tank being liquid full at 
105 [deg]F if insulated, or 115 [deg]F if uninsulated. If specific 
filling densities are designated in Subpart 151.50 of this part, they 
shall take precedence over that noted above.
    (b) Refrigerated and semirefrigerated tanks shall be filled so that 
there is an outage of at least 2 percent of the volume of the tank at 
the temperature corresponding to the vapor pressure of the cargo at the 
safety relief valve setting. A reduction in the required outage may be 
permitted by the Commandant when warranted by special design 
considerations. Normally, then, the maximum volume to which a tank may 
be loaded is:

VL = 0.98drV / dL

where:

VL = Maximum volume to which tank may be loaded.
V = Volume of tank.
dr = Density of cargo at the temperature required for a cargo 
          vapor pressure equal to the relief valve setting.
dL = Density of cargo at the loading temperature and pressure.



Sec.  151.45-7  Shipping papers.

    Each barge carrying dangerous cargo shall have on board a bill of 
lading, manifest, or shipping document giving the name of shipper, 
location of the loading point, and the kind, grade, and approximate 
quantity by compartment of each cargo in the barge. Such manifest or 
bills of lading may be made out by the shipper, master of the towing 
vessel, owner, or agent of the owner. However, in the case of unmanned 
barges the master of the towing vessel shall either have a copy of the 
shipping papers for each barge in his tow or he shall make an entry in 
the towing vessel's log book giving the name of the shipper, location 
where the barge was loaded, and the kind, grade, and quantity of cargo 
by compartment in the barge. The barge shall not be delayed in order to 
secure the exact quantities of cargo.



Sec.  151.45-8  Illness, alcohol, drugs.

    A person who is under the influence of liquor or other stimulants, 
or is so ill as to render him unfit to perform service shall not be 
permitted to perform any duties on the barge.



Sec.  151.45-9  Signals.

    While fast to a dock, a vessel during transfer of bulk cargo shall 
display a red flag by day or a red light by night, which signal shall be 
so placed that it will be visible on all sides. When at anchor, a vessel 
during transfer of bulk cargo shall display a red flag by day, placed so 
that it will be visible on all sides. This flag may be metallic.



                   Subpart 151.50_Special Requirements

    Editorial Note: Nomenclature changes to subpart 151.50 of part 151 
appear by CGD-95-072, 60 FR 50465, Sept. 29, 1995, and CGD-96-041, 61 FR 
50732, Sept. 27, 1996.



Sec.  151.50-1  General.

    Special requirements found in this subpart pertain to specific 
cargoes and to similar groups of cargoes. These requirements are in 
addition to and take precedence over any other requirements found in 
these regulations.



Sec.  151.50-5  Cargoes having toxic properties.

    When table 151.05 refers to this section, the following apply:
    (a) [Reserved]
    (b) Independent tanks shall be designed and tested for a head of at 
least 8 feet above the top of the tank using

[[Page 194]]

the specific gravity of the product to be carried. In addition, tank 
design calculations shall demonstrate that the tank can withstand, 
without rupture, a single loading to the highest level to which the 
product may rise, if that exceeds 8 feet. In general, plate less than 
five-sixteenths inch in thickness shall not be used in the fabrication 
of independent tanks unless otherwise approved.
    (c)(1) Cargo tanks transporting liquids having a Reid vapor pressure 
exceeding 14 pounds per square inch absolute or vented at a gauge 
pressure exceeding 4 pounds per square inch, or where air or water 
pressure is used to discharge the cargo, shall be fabricated as arc-
welded unfired pressure vessels.
    (2) Unfired pressure vessel cargo tanks shall be designed for a 
pressure not less than the vapor pressure, in pounds per square inch 
gauge, of the lading at 115 [deg]F, or the maximum air or water pressure 
used to discharge the cargo, whichever is greater, but in no case shall 
the design pressure of such tanks be less than 30 pounds per square inch 
gauge.
    (d) Piping. (1) The pumps and piping used for cargo transfer shall 
be independent of all other piping.
    (2) Where multiple cargoes are carried, and the cargo piping 
conveying cargoes covered under this section are led through cargo tanks 
containing other products, the piping shall be encased in a tunnel.
    (3) Where cargo lines handling other products, or bilge and ballast 
piping are led through tanks containing cargoes covered by this section, 
the piping shall be enclosed in a tunnel.
    (e) Gravity type cargo tanks shall be fitted with an approved 
pressure-vacuum relief valve of not less than 2\1/2\-inch size, which 
shall be set at a pressure of not less than 3 pounds per square inch 
gauge, but not in excess of the design pressure of the tank.
    (f) The discharge fittings from each safety relief or pressure 
vacuum relief valve shall be directed in such a manner as to not impinge 
on another tank, piping or any other equipment which would increase the 
fire hazard should burning products be discharged from the safety or 
pressure vacuum relief valve as a result of a fire or other casualty. In 
addition, the discharges shall be directed away from areas where it is 
likely that persons might be working and as remote as practicable from 
ventilation inlets and ignition sources. A common discharge header may 
be employed if desired. The area near the discharge fittings shall be 
clearly marked as a hazardous area.
    (g) A means shall be provided for either the reclamation or safe 
venting of vapors during the loading and unloading operations. For this 
purpose the safety relief or pressure vacuum relief valve shall be 
provided with a valved bypass to a vapor return line shore connection 
which shall be used whenever vapor return shore facilities are 
available. In the event vapors must be vented to the atmosphere, a vent 
riser shall extend at least 12 feet above the highest level accessible 
to personnel. The vent riser may be collapsible for ease of stowage when 
not in use. Vapor return lines or vent risers for tanks carrying the 
same class product may be connected to a common header system if 
desired. Tanks carrying cargoes covered by this section shall be vented 
independent of tanks carrying other products.
    (h) The pump room ventilation outlet duct exhausts shall terminate 
at a distance of at least 6 feet above the enclosed space or pump room 
and at least 6 feet from any entrance to the interior part of the 
vessel. The discharge end of the exhaust ducts shall be located so as to 
preclude the possibility of recirculating contaminated air through the 
pump room, or other spaces where personnel may be present.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.50-6  Motor fuel antiknock compounds.

    When transporting motor fuel antiknock compounds containing 
tetraethyl lead and tetramethyl lead the requirements listed in this 
section shall be observed.
    (a) Tanks used for these cargoes shall not be used for the 
transportation of any other cargo except those commodities to be used in 
the manufacture of tetraethyl lead and tetramethyl lead.

[[Page 195]]

    (b) Pump rooms shall be equipped with forced ventilation with 
complete air change every 2 minutes. Air analysis shall be run for lead 
content to determine if the atmosphere is satisfactory prior to 
personnel entering the pump room.
    (c) Entry into cargo tanks used for the transportation of these 
cargoes is not permitted.
    (d) No internal tank inspection is required. If it is desired to 
internally inspect tanks used for these cargoes, the Commandant must be 
notified in advance before such inspection is made.
    (e) The provisions of Sec.  151.50-5 shall also be met as a 
requirement for shipping antiknock compounds containing tetraethyl lead 
and tetramethyl lead.



Sec.  151.50-10  Alkylene oxides.

    (a) For the purpose of this part, alkylene oxides are considered to 
be ethylene oxide and propylene oxide.
    (b) Alkylene oxides transported under the provisions of this part 
shall be acetylene free.
    (c)(1) No other product may be transported in tanks certified for an 
alkylene oxide except that the Commandant may approve subsequent 
transportation of other products and return to alkylene oxide service if 
tanks, piping and auxiliary equipment are adequately cleaned to the 
satisfaction of the Marine Inspector.
    (2) Unless authorized by the Commandant, no other kind of cargo 
except methane, ethane, propane, butane and pentane shall be on board a 
tank vessel certificated for the carriage of an alkylene oxide at the 
same time an alkylene oxide in either the liquid or vapor state is 
present in any cargo tank. Alkylene oxide tanks shall not be installed 
in tanks intended for any other cargo.
    (d) All valves, flanges, fittings, and accessory equipment shall be 
of a type suitable for use with the alkylene oxides and shall be made of 
steel or stainless steel, or other materials acceptable to the 
Commandant. Impurities of copper, magnesium and other acetylide-forming 
metals shall be kept to a minimum. The chemical composition of all 
material used shall be submitted to the Commandant for approval prior to 
fabrication. Disks or disk faces, seats and other wearing parts of 
valves shall be made of stainless steel containing not less than 11 
percent chromium. Mercury, silver, aluminum, magnesium, copper, and 
their alloys shall not be used for any valves, gauges, thermometers, or 
any similar devices. Gaskets shall be constructed of spirally wound 
stainless steel with ``Teflon'' or other suitable material. All packing 
and gaskets shall be constructed of materials which do not react 
spontaneously with or lower the autoignition temperature of the alkylene 
oxides.
    (e) The pressure rating of valves, fittings, and accessories shall 
be not less than the maximum pressure for which the cargo tank is 
designed, or the shutoff head of the cargo pump, whichever is greater, 
but in no case less than 150 pounds per square inch. Welded fittings 
manufactured in accordance with A.N.S.I. Standards shall be used 
wherever possible, and the number of pipe joints shall be held to a 
minimum. Threaded joints in the cargo liquid and vapor lines are 
prohibited.
    (f) The thermometer shall terminate in the liquid space and shall be 
attached to the shell by welding with the end of the fitting being 
provided with a gastight screwed plug or bolted cover.
    (g) Automatic float continuous reading tape gauge, and similar 
types, shall be fitted with a shutoff valve located as close to the tank 
as practicable, which shall be designed to close automatically in the 
event of fracture of the external gauge piping. An auxiliary gauging 
device shall always be used in conjunction with an automatic gauging 
device.
    (h) Filling and discharge piping shall extend to within 4 inches of 
the bottom of the tank or sump pit if one is provided.
    (i) Venting. (1) The discharge fittings from each safety relief or 
pressure vacuum relief valve shall be directed in such a manner as to 
not impinge on another tank, piping or any other equipment which would 
increase the fire hazard should burning products be discharged from the 
safety or pressure vacuum relief valve as a result of a fire or other 
casualty. In addition, the discharges shall be directed away from areas 
where it is likely that persons

[[Page 196]]

might be working and as remote as practicable from ventilation inlets 
and ignition sources. A common discharge header may be employed if 
desired. The area near the discharge fittings shall be clearly marked as 
a hazardous area.
    (2) A means shall be provided for either the reclamation or safe 
venting of vapors during the loading and unloading operations. For this 
purpose, the safety relief or pressure vacuum relief valve shall be 
provided with a valved bypass to a vapor return line shore connection 
which shall be used whenever vapor return shore facilities are 
available. In the event vapors must be vented to the atmosphere, a vent 
riser shall be connected to the vapor return line and extend at least 12 
feet above the highest level accessible to personnel. The vent riser may 
be collapsible for ease of stowage when not in use. The vent riser shall 
not be connected to a safety relief or pressure vacuum valve. Vapor 
return lines or vent risers for tanks carrying the same class product 
may be connected to a common header system if desired. Tanks carrying 
alkylene oxides shall be vented independent of tanks carrying other 
products.
    (3) The outlet of each vent riser shall be fitted with acceptable 
corrosion-resistant flame screen of suitable material or a flame 
arrester suitable for use with alkylene oxide.
    (j) Ventilation. (1) All enclosed spaces within the hull shall be 
vented or ventilated in accordance with the provisions of this 
subchapter except as otherwise provided for in this subpart.
    (2) The enclosed spaces in which the cargo tanks are located shall 
be inerted by injection of a suitable inert gas or shall be well 
ventilated.
    (3) The enclosed spaces in which the cargo tanks are located, if an 
inerting system is not installed, shall be fitted with forced 
ventilation of such capacity to provide a complete change of air every 
three minutes and arranged in such a manner that any vapors lost into 
the space will be removed. The ventilation system shall be in operation 
at all times cargo is being loaded or discharged. No electrical 
equipment shall be fitted within the spaces or within ten feet of the 
ventilation exhaust from these spaces.
    (4) All ventilation machinery shall be of nonsparking construction 
and shall not provide a source of vapor ignition.
    (5) Each vent shall be fitted with a flame screen of corrosion 
resistant wire which is suitable for use with the alkylene oxide.
    (k)(1) Flexible metal hose fabricated of stainless steel or other 
acceptable material, resistant to the action of the alkylene oxide, 
shall be fitted to the liquid and vapor lines during cargo transfer.
    (2) The hose shall be marked with the maximum pressure guaranteed by 
the manufacturer, and with his certification with the words ``Certified 
for _____ Oxide.''
    (3) Cargo hose intended for alkylene oxide service shall not be used 
for any other products except those which are compatible with the 
alkylene oxide.
    (l) Vessel shall be electrically bonded to the shore piping prior to 
connecting the cargo hose. This electrical bonding shall be maintained 
until after the cargo hose has been disconnected and any spillage has 
been removed.
    (m) Cargo shall be discharged by pumping or by displacement with 
nitrogen or other acceptable inert gas. In no case shall air be allowed 
to enter the system. During loading and unloading operations, the vapor 
shall not be discharged to the atmosphere. Provisions shall be made to 
return all displaced vapor to the loading facility. The loading rate and 
the pressure applied to the tank to discharge the cargo shall be so 
limited to prevent opening the safety relief valves.
    (n) During cargo transfer, a water hose with pressure to the nozzle, 
when atmospheric temperatures permit, shall be connected to a water 
supply for immediate use during filling and discharge operations and any 
spillage of alkylene oxide shall be immediately washed away. This 
requirement can be met by facilities provided from shore.
    (o) Prior to disconnecting shore lines, the pressure in the liquid 
and vapor lines shall be relieved through suitable valves installed at 
the loading header. The liquid and vapor discharged from these lines 
shall not be discharged to atmosphere.
    (p) The safety relief valves shall be tested by liquid, gas, or 
vapor pressure

[[Page 197]]

at least once every 2 years to determine the accuracy of adjustment and, 
if necessary, shall be reset. Alkylene oxides shall not be used as the 
testing medium.
    (q) The special requirements for ethylene oxide contained in Sec.  
151.50-12 and for propylene oxide contained in Sec.  151.50-13 shall 
also be observed.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85-061, 54 FR 
50966, Dec. 11, 1989]



Sec.  151.50-12  Ethylene oxide.

    (a)(1) Ethylene oxide shall be carried in fixed, independent, 
pressure vessel type cargo tanks, designed, constructed, arranged and, 
if necessary, equipped with machinery to maintain the cargo temperature 
below 90 [deg]F except as otherwise provided for in paragraph (a)(3) of 
this section.
    (2) Ethylene oxide shall be loaded at a temperature below 70 [deg]F.
    (3) When ethylene oxide is to be transported at or near atmospheric 
pressure, the Commandant may permit the use of alternate methods of 
storage which are consistent with the minimum requirements of this 
subpart.
    (b)(1) All cargo tanks shall be constructed of a carbon steel or 
stainless steel acceptable to the Commandant. Impurities of copper, 
magnesium and other acetylide-forming metals shall be kept to a minimum. 
The chemical composition of all steel used shall be submitted to the 
Commandant for approval prior to fabrication. Aluminum, copper and other 
acetylide-forming metals, such as silver, mercury, magnesium, and their 
alloys shall not be used as materials of construction for tanks or 
equipment used in handling ethylene oxide.
    (2) Cargo tanks shall meet the requirements of Class I pressure 
vessels.
    (3) Cargo tanks shall be designed for the maximum pressure of vapor 
or gas used in discharging the cargo but in no case shall the design 
pressure of such tanks be less than 75 pounds per square inch gauge. The 
tank shell and heads shall not be less than \5/16\-inch thick.
    (c)(1) Cargo tanks shall be located below deck in holds or enclosed 
spaces with the domes or trunks extended above the weather deck and 
terminating in the open. Provisions shall be made to maintain the 
watertightness of the deck by means of watertight seals around such 
domes or trunks. The holds or enclosed spaces, in which the ethylene 
oxide tanks are located, shall not be used for any other purpose. 
However, in open hopper type barges of a suitable design approved for 
such service, the weatherdeck may not be required to be watertight.
    (2) All cargo tanks shall be installed with the manhole openings and 
all tank connections located above the weatherdeck in the open.
    (3) Tanks shall be electrically bonded to the hull.
    (4) No welding of any kind shall be done on cargo tanks or 
supporting structure unless authorized by the Commandant.
    (d) All cargo tanks, piping, valves, fittings, and similar equipment 
which may contain ethylene oxide in either the liquid or vapor phase, 
including the vent risers, shall be insulated. Flanges need not be 
covered, but if covered, a small opening shall be left at the bottom of 
the flange cover to detect leaks. Insulation shall be of an approved 
incombustible material suitable for use with ethylene oxide, which does 
not significantly lower the autoignition temperature and which does not 
react spontaneously with ethylene oxide. The insulation shall be of such 
thickness as to provide a thermal conductance of not more than 0.075 
B.t.u. per square foot per degree Fahrenheit differential in temperature 
per hour.
    (e)(1) When cooling systems are installed to maintain the 
temperature of the liquid below 90 [deg]F, at least two complete cooling 
plants, automatically regulated by temperature variations within the 
tanks shall be provided; each to be complete with the necessary 
auxiliaries for proper operation. The control system shall also be 
capable of being manually operated. An alarm shall be provided to 
indicate malfunctioning of the temperature controls. The capacity of 
each cooling system shall be sufficient to maintain the temperature of 
the liquid cargo at or below the design temperature of the system.
    (2) An alternate arrangement may consist of three cooling plants, 
any two of which shall be sufficient to maintain the temperature of the 
liquid cargo at

[[Page 198]]

or below the design temperature of the system.
    (3) Cooling systems requiring compression of ethylene oxide are 
prohibited.
    (f) In addition to the shutoff valve required, all tank connections 
larger than one-half inch inside pipe size, except safety relief valves 
and liquid level gauging devices, shall be fitted with either internal 
back pressure check valves or internal excess flow valves in conjunction 
with a quick closing stop valve operable from at least two remote 
locations. The quick closing stop valve shall be of the ``fail safe'' 
type acceptable to the Commandant and shall be equipped with a fusible 
plug designed to melt between 208 [deg]F and 220 [deg]F, which will 
cause the quick closing valve to close automatically in case of fire. 
The quick closing valve shall be located as close to the tank as 
possible.
    (g) Piping systems intended for ethylene oxide service shall not be 
used for any other product and shall be completely separate from all 
other systems. The piping system shall be designed so that no cross 
connections may be made either through accident or design.
    (h) Each safety relief valve shall be set to start to discharge at 
not less than 75 pounds per square inch gauge, nor more than the design 
pressure of the tank.
    (i) The filling density shall not exceed 83 percent.
    (j)(1) The cargo shall be shipped under a suitable protective 
inerting gas system, such as nitrogen. When nitrogen gas is used, the 
gas inerting system shall be so designed that the vapor space above the 
liquid cargo will be filled and maintained with a gas mixture of not 
less than 45 percent nitrogen. Other gases proposed for inerting use may 
be given consideration by the Commandant. Original charging only of 
protective inerting gas at the loading facility is not considered 
adequate. A sufficient amount of spare inerting gas as approved by the 
Commandant shall be provided on the vessel in order to maintain the 
proper concentration of the gas in the event of normal leakage or other 
losses.
    (2) Any inerting gas selected should be at least 98 percent pure and 
free of reactive materials, such as ammonia, hydrogen sulfide, sulfur 
compounds, and acetylene.
    (k) Prior to loading, a sample from the cargo tank will be taken to 
insure that the pad gas will meet the requirements of paragraph (j) of 
this section and that the oxygen content of the vapor space will be not 
more than 2 percent maximum. If necessary, a sample will be taken after 
loading to insure the vapor space meets this requirement.
    (l) The cargo piping shall be inspected and tested at least once in 
each 2 calendar years.
    (m) In those cases where the cargo transfer hose used is not part of 
the barge's equipment, the person in charge of the transfer operation 
shall determine that the provisions of Sec.  151.50-10(k) have been met 
before using this hose. A certificate of test, supplied by the transfer 
facility, will be considered as adequate for this determination.
    (n) The provisions of Sec.  151.50-10 shall be complied with as a 
requirement for shipping ethylene oxide.
    (o) A hydrostatic test of 1\1/2\ times the design pressure shall be 
made on the cargo tanks at least once in each 4 years at the time the 
internal examination is made and at such other times as considered 
necessary by the Officer in Charge, Marine Inspection.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85-061, 54 FR 
50966, Dec. 11, 1989]



Sec.  151.50-13  Propylene oxide.

    (a)(1) Pressure vessel cargo tanks shall meet the requirements of 
Class II pressure vessels.
    (2) Cargo tanks shall be designed for the maximum pressure expected 
to be encountered during loading, storing and discharging the cargo but 
in no case shall the design pressure of pressure vessel tanks be less 
than thirty (30) pounds per square inch gauge. The tank shell and heads 
shall not be less than \5/16\-inch thick.
    (b) When propylene oxide is carried on board a vessel, piping 
systems in propylene oxide service shall not be used for any other 
product and shall be

[[Page 199]]

completely separate from all other systems. The piping system shall be 
designed so that no cross connection may be made through inadvertence.
    (c) Each safety relief valve shall be set to start to discharge at 
not less than 30 pounds per square inch gauge, nor more than the design 
pressure of the tank.
    (d) Filling density shall not exceed 80 percent.
    (e)(1) The cargo shall be shipped under a suitable protective 
padding, such as nitrogen gas. Other gases proposed for use as padding 
may be given consideration by the Commandant. Original charging only of 
protective gas padding at the loading facility is not considered 
adequate. A sufficient amount of spare padding gas as approved by the 
Commandant shall be provided on the vessel in order to maintain the 
proper concentration of the gas in the event of normal leakage or other 
losses.
    (2) Any padding gas selected should be at least 98 percent pure and 
free of reactive materials.
    (f) Prior to loading, a sample from the cargo tank will be taken to 
insure that the pad gas will meet the requirements of paragraph (e) of 
this section and that the oxygen content of the vapor space will be not 
more than 2 percent maximum. If necessary, a sample will be taken after 
loading to insure the vapor space meets this requirement.
    (g) The cargo piping shall be subjected to a hydrostatic test of 
1\1/2\ times the maximum pressure to which they may be subjected in 
service.
    (h) The Commandant may permit the transportation of propylene oxide 
in other than pressure vessel type tanks if it is shown to his 
satisfaction that a degree of safety is obtained consistent with the 
minimum requirements of this subpart.
    (i) The provisions of Sec.  151.50-10 shall be complied with as a 
requirement for shipping propylene oxide.



Sec.  151.50-20  Inorganic acids.

    (a)(1) Gravity type cargo tanks shall be designed and tested to meet 
the rules of the American Bureau of Shipping for a head of water at 
least 8 feet above the tank top or the highest level the lading may 
rise, whichever is the greater. The plate thickness of any part of the 
tank shall not be less than three-eighths inch.
    (2) Gravity tank vents. (i) The outlet end of the gravity tank vent 
shall terminate above the weatherdeck, clear of all obstructions and 
away from any source of ignition.
    (ii) The gravity tank vent shall terminate in a gooseneck bend and 
shall be fitted with a single flame screen or two fitted flame screens 
as described in Sec.  151.03-25. No shutoff valve or frangible disk 
shall be fitted in the vent lines.
    (b)(1) Pressure vessel type cargo tanks shall be independent of the 
vessel's structure and shall be designed for the maximum pressure to 
which they may be subjected when compressed air is used to discharge the 
cargo, but in no case shall the design pressure be less than that 
indicated as follows:

Fluorosilicic Acid--50 pounds per square inch gauge.
Hydrochloric Acid--50 pounds per square inch gauge.
Hydrofluorosilicic Acid, see Fluorosilicic Acid.
Phosphoric Acid--30 pounds per square inch gauge.
Sulfuric Acid--50 pounds per square inch gauge.

    (2) Pressure vessel type cargo tanks shall be of welded construction 
meeting the requirements for Class II or Class III given in Part 54 of 
this chapter.
    (3) When compressed air is used to discharge the cargo, the tank 
shall be fitted with a vent led to the atmosphere in which a rupture 
disk shall be installed. The rupture disk shall be designed to burst at 
a pressure not exceeding the design pressure of the tank. An auxiliary 
vent to relieve the pressure or vacuum in the tank during the cargo 
transfer operation may be led from the vent line between the tank and 
the rupture disk. A shutoff valve may be fitted in the auxiliary vent.
    (c) Openings in tanks are prohibited below deck, except for access 
openings used for inspection and maintenance of tanks, or unless 
otherwise specifically approved by the Commandant. Openings shall be 
fitted with bolted cover plates and acid-resistant gaskets.

[[Page 200]]

    (d) Where special arrangements are approved by the Commandant to 
permit a pump suction to be led from the bottom of the tank, the filling 
and discharge lines shall be fitted with shutoff valves located above 
the weatherdeck or operable therefrom.
    (e) The outage shall not be less than 1 percent.
    (f) All enclosed compartments containing cargo tanks and all 
machinery spaces containing cargo pumps shall be fitted with effective 
means of ventilation.
    (g) A separator shall be fitted in compressed air lines to the tank 
when air pressure is used to discharge the cargo.
    (h) Only installed electric or portable battery lights shall be used 
during the cargo transfer operations. Smoking is prohibited and the 
person in charge of cargo transfer shall post No Smoking signs during 
cargo transfer operations.
    (i) Tanks approved for the transportation of acid cargoes subject to 
this section shall not be used for the transportation of any other 
commodity, except upon authorization by the Commandant (CG-ENG).
    (j) Each cargo tank shall be subjected to an internal examination at 
least once in every 4 years. If cargo tank lining is required and the 
lining of the cargo tank has deteriorated in service or is not in place, 
the Marine Inspector may require the tank to be tested by such 
nondestructive means as he may consider necessary to determine its 
condition.
    (k) The special requirements for fluorosilicic acid in Sec.  151.50-
77, for hydrochloric acid in Sec.  151.50-22, for hydrofluorosilicic 
acid, see fluorosilicic acid, for phosphoric acid in Sec.  151.50-23, 
and for sulfuric acid in Sec.  151.50-21 also apply to the carriage of 
those acids.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 80-001, 46 FR 
63279, Dec. 31, 1981; CGD 82-063b, 48 FR 4781, Feb. 3, 1983; CGD 88-100, 
54 FR 40040, Sept. 29, 1989; CGD 92-100, 59 FR 17028, Apr. 11, 1994]



Sec.  151.50-21  Sulfuric acid.

    (a) How sulfuric acid may be carried. (1) Sulfuric acid of 
concentration of 77.5 percent (1.7019 specific gravity) (59.8[deg] 
Baum[eacute]) or greater concentrations with or without an inhibitor, 
provided the corrosive effect on steel measured at 100 [deg]F is not 
greater than that of 66[deg] Baum[eacute] commercial sulfuric acid, may 
be transported in unlined gravity type cargo tanks or unlined pressure 
vessel type cargo tanks.
    (2) Sulfuric acid of concentration of 65.25 percent (1.559 specific 
gravity) (52[deg] Baum[eacute]) or greater concentrations, provided the 
corrosive effect on steel measured at 100 [deg]F is not greater than 
that of 52[deg] Baum[eacute] commercial sulfuric acid, may be 
transported in unlined pressure vessel type cargo tanks independent of 
the vessel's structure.
    (3) Sulfuric acid of concentration not to exceed 65.25 percent 
(1.559 specific gravity) (52[deg] Baum[eacute]) may be transported in 
gravity type cargo tanks or pressure-vessel type cargo tanks which are 
lined with lead or other equally suitable acid-resistant material 
acceptable to the Commandant.
    (4) Sulfuric acid of concentration not to exceed 51 percent (1.408 
specific gravity) (42[deg] Baum[eacute]) and spent sulfuric acid 
resulting from the use of sulfuric acid in industrial processes may be 
transported in gravity type cargo tanks which are lined with rubber or 
other equally suitable acid-resistant material acceptable to the 
Commandant. See Sec.  151.15-3(f)(2).
    (5) Spent or sludge sulfuric acid resulting from the use of sulfuric 
acid in industrial processes may be transported in unlined gravity type 
cargo tanks or unlined pressure vessel type cargo tanks, provided the 
corrosive effect on steel is not greater than that of commercial 
sulfuric acid as prescribed in paragraph (a)(1) of this section.
    (b) Heating coils will be the only acceptable means of liquefying 
frozen or congealed sulfuric acid.
    (c) During cargo transfer, a water hose shall be connected to a 
water supply ready for immediate use and any leakage or spillage of acid 
shall be immediately washed down. This requirement can be met by 
facilities provided from shore.
    (d) The requirements of Sec.  151.50-20 are also applicable to the 
shipment of sulfuric acid.



Sec.  151.50-22  Hydrochloric acid.

    (a) Hydrochloric acid shall be carried in gravity or pressure type 
cargo tanks which are independent of the vessel's

[[Page 201]]

structure provided such tanks are lined with rubber or other equally 
suitable material acceptable to the Commandant. See Sec.  151.15-
3(f)(2).
    (b) Notwithstanding the provisions of Sec.  151.50-20(b)(3), 
compressed air may be used to discharge hydrochloric acid from gravity 
type cargo tanks only if the tanks are of cylindrical shape with dished 
heads, provided the air pressure does not exceed the design pressure of 
the tank but in no case shall it exceed 10 pounds per square inch gauge. 
Such tanks shall be fitted with pressure relief devices and need not be 
vented to the atmosphere as required by Sec.  151.50-20(b)(3).
    (c) During cargo transfer, a water hose shall be connected to a 
water supply and be ready for immediate use. Any leakage or spillage of 
acid shall be immediately washed down. This requirement can be met by 
facilities provided from shore.
    (d) Spent hydrochloric acid or hydrochloric acid adulterated by 
other chemicals, inhibitors, oils, solvents, water, etc., shall not be 
transported in bulk except upon authorization by the Commandant (CG-
ENG).
    (e) The requirements of Sec.  151.50-20 are also applicable to the 
shipment of hydrochloric acid.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.50-23  Phosphoric acid.

    (a) The term phosphoric acid as used in this subpart shall include, 
in addition to phosphoric acid, aqueous solutions of phosphoric acid, 
and super phosphoric acid.
    (b) Phosphoric acid may be carried in either gravity or pressure 
type cargo tanks. The tanks shall be rubber-lined, or lined or clad with 
other suitable material acceptable to the Commandant, or shall be 
fabricated of a phosphoric acid resistant stainless steel. See Sec.  
151.15-3(f)(2).
    (c) The vessel's shell plating shall not be used as any part of the 
boundaries of gravity type cargo tanks.
    (d) Cargo piping, including valves, fittings, and flanges where 
exposed to the acid, shall be rubber-lined, or lined, coated or clad 
with other corrosion-resistant material, or shall be fabricated of a 
phosphoric acid resistant stainless steel. Vent piping, including 
flanges and fittings, shall be similarly protected at least to the 
height of the frangible disk if such is installed.
    (e) Phosphoric acid adulterated by other chemicals, inhibitors, 
oils, solvents, etc., shall not be transported in bulk cargo tanks 
except upon authorization by the Commandant (CG-ENG).
    (f) The requirements of Sec.  151.50-20 are also applicable to the 
shipment of phosphoric acid.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 82-063b, 48 FR 
4781, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  151.50-30  Compressed gases.

    (a) All tank inlet and outlet connections, except safety relief 
valves, liquid level gauging devices, and pressure gauges shall be 
marked to designate whether they terminate in the vapor or liquid space. 
Labels, when used, shall be of corrosion-resistant materials and may be 
attached to valves.
    (b) Venting. (1) Except as provided in paragraph (b)(2) of this 
section each safety relief valve installed on a cargo tank shall be 
connected to a branch vent of a venting system which shall be 
constructed so that the discharge of gas will be directed vertically 
upward to a point at least 10 feet above the weatherdeck or the top of 
any tank or house located above the weatherdeck.
    (2) Safety valves on cargo tanks in barges may be connected to 
individual or common risers which shall extend to a reasonable height 
above the deck. Where the escape of vapors from the venting system may 
interfere with towing operations, the installation shall be acceptable 
to the Commandant, and the arrangement shall be such as to minimize the 
hazard of escaping vapors. Arrangements specially provided for venting 
cargo tanks forming part of the hull on unmanned barges will be given 
special consideration by the Commandant.
    (3) The capacity of branch vents or vent headers shall depend upon 
the number of cargo tanks connected to such branch or header as provided 
in Table 151.50-30(b)(3).

[[Page 202]]



     Table 151.50-30(b)(3)--Capacity of Branch Vents or Vent Headers
 
                                                                Percent
                                                                of total
                    Number of cargo tanks                        valve
                                                               discharge
 
1 or 2.......................................................        100
3............................................................         90
4............................................................         80
5............................................................         70
6 or more....................................................         60
 

    (4) Return bends and restrictive pipe fittings are prohibited. Vents 
and headers shall be so installed as to minimize stresses on safety 
relief valves and their mounting nozzles.
    (5) When vent discharge risers are installed, they shall be so 
located as to protect against physical damage and be fitted with loose 
raincaps.
    (6) When vent discharge risers are installed and their installation 
in accordance with the provisions of this paragraph results in 
restrictions in the operation of the barge due to navigation clearances, 
the vents may be designed so as to be collapsible when passing under 
such low clearance obstacles.
    (c) Repairs involving welding or burning. (1) Repairs involving 
welding or burning shall not be undertaken on the cargo tanks or piping 
while cargo in either the liquid or vapor state is present therein.
    (2) Repairs involving welding or burning on parts of the barge other 
than cargo tanks or piping may be undertaken provided positive pressure 
is maintained in the tanks or the tanks have been vented or washed 
internally.
    (d) Respiratory equipment. (1) At least one approved self-contained 
breathing apparatus shall be available in a readily accessible location 
off the barge at all times during the cargo transfer operations. This 
equipment shall not be considered to be part of the barge equipment, and 
the barge shall not be required to carry this equipment en route.
    (2) The approved self-contained breathing apparatus, masks, and all 
respiratory protective devices shall be of types suitable for starting 
and operating at the temperatures encountered, and shall be maintained 
in good operating condition.
    (3) Personnel involved in the cargo transfer operations shall be 
adequately trained in the use of the respiratory equipment.
    (e) Filling densities and container design pressure. For compressed 
gases transported at or near ambient temperatures, the maximum filling 
densities and minimum design pressure of container as indicated in Table 
151.50-30(e) shall apply. Deviations from the tabulated values shall be 
submitted to the Commandant for approval. Where cargo is to be carried 
at temperatures below ambient, the tank shall be designed in accordance 
with Sec.  151.15-3(b)(3) and the maximum amount of cargo shall be in 
accordance with Sec.  151.45-6(b).

                      Table 151.50-30(e)--Filling Densities and Container Design Pressures
----------------------------------------------------------------------------------------------------------------
                                                           Maximum permitted filling  Minimum design pressure of
                                                              density (percent by       tank (pounds per square
                                                          weight, see Sec.   151.03-          inch gauge)
                       Kind of gas                                    21)            ---------------------------
                                                         ----------------------------
                                                           Uninsulated    Insulated    Uninsulated    Insulated
                                                              tanks         tanks         tanks         tanks
----------------------------------------------------------------------------------------------------------------
Ammonia, anhydrous......................................            57            58           250           215
Chlorine................................................           125           125           300           300
Dichlorodifluoromethane.................................           123           125           147           127
Dimethylamine...........................................            61            62            46            36
Methyl chloride.........................................            85            87           131           112
Monochlorodi-fluoromethane..............................           110           113           243           211
Vinyl chloride..........................................            86            87            81            67
----------------------------------------------------------------------------------------------------------------

    (f) The shell and head thickness of liquefied compressed cargo tanks 
shall not be less than five-sixteenths inch.
    (g) The special requirements for ammonia (anhydrous) in Sec.  
151.50-32, for argon in Sec.  151.50-36, for chlorine in Sec.  151.50-
31, for nitrogen in Sec.  151.50-36,

[[Page 203]]

and for vinyl chloride in Sec.  151.50-34 also apply to the carriage of 
those gases.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.50-31  Chlorine.

    (a) Chlorine barges. Subparts 98.03 and 98.20 of Part 98 of this 
chapter have been revoked. However, chlorine barges that were certified 
in accordance with the requirements of subpart 98.20 of part 98 of this 
chapter and having hulls modified, if necessary, to comply with 
Sec. Sec.  98.03-5(c) and 98.03-25(c) of this chapter, shall be 
considered as complying with this part.
    (b) Design and construction of cargo tanks. (1) The cargo tanks 
shall meet the requirements of Class I pressure vessels.
    (2) Tanks shall be designed for a pressure of not less than 300 
pounds per square inch gauge. For the maximum allowable working pressure 
of tanks in service, see paragraph (q) of this section.
    (3) Each tank shall be provided with one or more 24-inch inside 
diameter manhole, fitted with a cover located above the maximum liquid 
level and as close as possible to the top of the tank. There shall be no 
other openings in the tank.
    (c) Tanks may be installed ``on deck'' or ``under deck'' with the 
tank protruding above deck. If a portion of the tank extends above the 
weatherdeck, provision shall be made to maintain the weathertightness on 
the deck. All tanks shall be installed with the manhole opening located 
above the weatherdeck. Hopper type barges operating on protected inland 
waters may have tanks located in the hopper space.
    (d) All valves, flanges, fittings and accessory equipment shall be 
of a type suitable for use with chlorine and shall be made of metal, 
corrosion-resistant to chlorine in either the gas or liquid phase. Cast 
or malleable iron shall not be used. Valves, flanges, and flanged joints 
shall be 300 pounds A.N.S.I. standard minimum with tongue and groove or 
raised face. Joints shall be fitted with sheet lead or other suitable 
gasket material. Welded fittings shall be used wherever possible and the 
number of pipe joints held to a minimum. Threaded joints in cargo lines 
and vapor lines shall not be used in sizes above 1 inch internal 
diameter. Welded ``hammerlock'' unions or other unions approved by the 
Commandant may be used at terminal points of fixed barge piping.
    (e) Each tank shall be provided with liquid and vapor connections 
fitted with manually operated shutoff valves and with safety relief 
valves. All valves shall be bolted to the cover or covers specified in 
paragraph (b)(3) of this section and shall be protected against 
mechanical damage by a suitable protective metal housing. A drain 
connection shall be provided from the protective housing.
    (f) All liquid and vapor connections, except safety relief valves, 
shall be fitted with automatic excess flow valves, which shall be 
located on the inside of the tank. Bypass openings are not permitted in 
excess flow valves.
    (g) Chlorine barge cargo piping shall not be fitted with the 
nonreturn valves specified by Sec.  151.20-20(b).
    (h) Liquid level gauging devices of any type are prohibited on 
chlorine tanks.
    (i) A pressure gauge shall be attached to the vapor shutoff valve or 
vapor line so as to indicate the pressure in the tank at all times 
during loading and unloading.
    (j) Piping including connections between tank valves and fixed barge 
piping, shall be of a thickness of not less than Schedule 80.
    (k) In multiple tank installations the tanks shall not be 
interconnected by piping or manifolds which may contain liquid chlorine. 
Manifolding of vapor lines of individual tanks into a common header for 
connection to shore is permitted. More than one cargo tank may be filled 
or discharged at a time, provided each tank is filled from or discharged 
to shore tanks through separate lines.
    (l) Connections between fixed barge piping and shore piping shall be 
fabricated from one of the following:
    (1) Schedule 80 seamless pipe, having flexible metallic joints.
    (2) Corrosion-resistant metallic pipe (equivalent to Schedule 80) 
not subject to deterioration by chlorine, having flexible metallic 
joints.

[[Page 204]]

    (3) Flexible metallic hose acceptable to the Commandant. If 
paragraphs (k)(1) or (2) of this section are used, the flexible metallic 
joints shall meet the requirements for cargo hose. See Sec.  151.04-
5(h).
    (m) Safety relief valves shall discharge into the protective housing 
surrounding the valves. Suitable provisions shall be made to vent the 
housing. The arrangement shall be such as to minimize the hazard of 
escaping vapors.
    (n) Cargo transfer operations. (1) The amount of chlorine loaded 
into each cargo tank shall be determined by weight. Draft marks shall 
not be used as a means of weighing. Any chlorine vapors vented during 
the filling operation shall be disregarded when calculating the maximum 
amount of chlorine to be loaded into the cargo tanks.
    (2) Prior to the start of filling operations, care shall be 
exercised to insure that the cargo tanks are empty, dry, and free from 
foreign matter.
    (3) After the filling operation is completed, the vapor in each 
cargo tank shall be analyzed to determine the percentage of gaseous 
chlorine in the vapor space. If it should contain less than 80 percent 
chlorine by volume, vapors shall be withdrawn through the vent or vapor 
line until the vapor in the cargo tanks contains at least 80 percent 
chlorine by volume.
    (4) After filling connections are removed, upon completion of the 
loading of a cargo tank, all connections at the tank shall be tested for 
leakage of chlorine by the aqua ammonia method.
    (5) The chlorine in the cargo tanks shall be discharged by the 
pressure differential method. If the vapor pressure of the chlorine is 
not sufficient to force the liquid out of the tank, compressed air, or 
other nonreactive gas, may be used to secure the desired rate of 
discharge, provided the air or gas is oil-free and thoroughly dried by 
passing it over activated aluminum oxide, silica gel, or other 
acceptable drying agent, and provided the supply pressure is limited to 
75 percent of maximum allowable pressure of chlorine tanks.
    (6) After completion of cargo transfer, any liquid chlorine in the 
cargo piping shall be removed and cargo transfer piping shall be 
disconnected at the cargo tanks. After disconnecting the cargo piping, 
both ends of the line shall be closed and all inlet and outlet valves on 
the tank shall be plugged or fitted with blind flanges.
    (o) During cargo transfer, every person on the barge shall carry on 
his person a respiratory protective device which will protect the wearer 
against chlorine vapors and will provide respiratory protection for 
emergency escape from a contaminated area resulting from cargo leakage. 
This respiratory protective equipment shall be of such size and weight 
that the person wearing it will not be restricted in movement or in the 
wearing of a lifesaving device.
    (p) During each internal inspection, each cargo tank must be tested 
hydrostatically to 1\1/2\ times the maximum allowable pressure as 
determined by the safety relief valve setting.
    (q) During each internal inspection, each cargo tank excess flow 
valve and safety relief valve must be inspected and tested in accordance 
with paragraphs (g) and (i) of Sec.  151.04-5 of this chapter.
    (r) When periodic inspection indicates that a cargo tank has 
deteriorated in service, the maximum allowable pressure shall be 
recalculated, using the minimum thickness found by actual measurement. 
The recalculated maximum allowable pressure shall be not less than 275 
pounds per square inch gauge. If the recalculated maximum allowable 
pressure is less than 275 pounds per square inch gauge, the cargo tanks 
shall be withdrawn from service.
    (s) The following substances shall not be carried as stores on board 
barges transporting chlorine in bulk: hydrogen, methane, liquefied 
petroleum gases, coal gas, acetylene, ammonia, turpentine, compounds 
containing metallic powders, finely divided metals or finely divided 
organic materials.
    (t) The requirements of Sec.  151.50-30 for compressed gases are 
also applicable to the shipment of chlorine.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85-061, 54 FR 
50966, Dec. 11, 1989; CGD 85-061, 55 FR 41918, Oct. 16, 1990; USCG-2014-
0688, 79 FR 58284, Sept. 29, 2014]

[[Page 205]]



Sec.  151.50-32  Ammonia, anhydrous.

    (a) The anhydrous ammonia tanks may be installed in the bulk liquid 
cargo tanks provided the liquid surrounding the enclosed anhydrous 
ammonia tanks complies with the following chemical and physical 
properties:
    (1) Boiling point above 125 [deg]F atmospheric pressure.
    (2) Inert to ammonia at 100 [deg]F at atmospheric pressure.
    (3) Noncorrosive in the liquid and vapor phase to the ammonia tanks 
and piping.
    (b) Copper, copper alloys, and copper bearing alloys shall not be 
used as materials of construction for tanks, pipelines, valves, 
fittings, and other items of equipment that may come in contact with 
anhydrous ammonia liquid or vapor.
    (c) Valves, flanges and pipe fittings shall be of the tongue and 
groove or raised-face type, fitted with suitable gasket material. Welded 
fittings shall be used wherever possible and the number of pipe joints 
shall be held to a minimum. Threaded joints are not permitted for pipe 
diameters exceeding 2 inches. Brazed joints are prohibited.
    (d) All enclosed spaces containing cargo tanks fitted with bottom 
outlet connections shall be provided with mechanical ventilation of 
sufficient capacity to assure a change of air every 3 minutes.
    (e) Each cargo tank shall be electrically grounded to the hull.
    (f) When transferring cargo, a hose shall be connected to a water 
supply so that if leakage of anhydrous ammonia occurs the vapor may be 
dispersed by the use of water fog. This requirement can be met by 
facilities provided from shore.
    (g) During cargo transfer operations, every person on the vessel 
shall carry on his person or have close at hand at all times a canister 
mask approved for ammonia or each person shall carry on his person a 
respiratory protective device which will protect the wearer against 
ammonia vapors and will provide respiratory protection for emergency 
escape from a contaminated area resulting from cargo leakage. This 
respiratory protective equipment shall be of such size and weight that 
the person wearing it will not be restricted in movement or in the 
wearing of a lifesaving device.
    (h) [Reserved]
    (i) The requirements of Sec.  151.50-30 for compressed gases are 
also applicable to the shipment of anhydrous ammonia.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 85-061, 54 FR 
50966, Dec. 11, 1989]



Sec.  151.50-34  Vinyl chloride (vinyl chloride monomer).

    (a) Copper, aluminum, magnesium, mercury, silver, and their alloys 
shall not be used as materials of construction for tanks, pipelines, 
valves, fittings, and other items of equipment that may come in contact 
with vinyl chloride liquid or vapor.
    (b) Valves, flanges, and pipe fittings shall be of the tongue and 
groove or raised-face type, fitted with suitable gasket material. Welded 
fittings shall be used wherever possible and the number of pipe joints 
shall be held to a minimum. Threaded joints are not permitted for pipe 
diameters exceeding 2 inches. Brazed joints are prohibited.
    (c) Each cargo tank shall be electrically grounded to the hull.
    (d) The vessel shall be electrically bonded to the shore piping 
prior to connecting the cargo hose. This electrical bonding shall be 
maintained until after the cargo hose has been disconnected and any 
spillage has been removed.
    (e) To the extent he deems it necessary, the Officer in Charge, 
Marine Inspection, may require that sufficient insulation shall be 
removed from insulated tanks at least once in each 8 calendar years to 
permit spot external examination of the tanks and insulation in 
accordance with Sec.  151.04-5(c).
    (f) The requirements of Sec.  151.50-30 for compressed gases are 
also applicable to the shipment of vinyl chloride.
    (g) The person in charge of cargo transfer shall ensure that:
    (1) Cargo vapors are returned to the cargo tank or shore disposition 
for reclamation or destruction during cargo transfer operations;
    (2) Continuous monitoring for vinyl chloride vapor leaks is 
conducted aboard a tank barge undergoing vinyl chloride transfer 
operations. Fixed or

[[Page 206]]

portable instrumentation may be utilized to ensure that personnel are 
not exposed to vinyl chloride vapor concentrations in excess of 1 ppm 
averaged over any eight hour period of 5 ppm averaged over any period 
not exceeding 15 minutes. The method of monitoring and measurement shall 
have an accuracy (with a confidence level of 95 percent) of not less 
than plus or minus 50 percent from 0.25 through 0.5 ppm, plus or minus 
35 percent from over 0.5 ppm through 1.0 ppm, and plus or minus 25 
percent over 1.0 ppm;
    (3) Cargo transfer operation is discontinued or corrective action is 
initiated by the person in charge to minimize exposure to personnel 
whenever a vinyl chloride vapor concentration in excess of 1 ppm is 
detected. If the vinyl chloride vapor concentration exceeds 5 ppm for 
over 15 minutes, action to reduce the leak can be continued only if the 
respiratory protection requirements of 29 CFR 1910.1017 are met by all 
personnel in the area of the leak;
    (4) Those portions of cargo lines which will be open to the 
atmosphere after piping is disconnected are free of vinyl chloride 
liquid and that the vinyl chloride vapor concentration in the area of 
the cargo piping disconnect points is not greater than 5 ppm;
    (5) Any restricted gauge fitted on a tank containing vinyl chloride 
is effectively out of service by locking or sealing the device so that 
it cannot be used; and
    (6) A restricted gauge is not to be used as a ``check'' on the 
required closed gauge, nor as a means or sampling.
    (h) The words ``CANCER--SUSPECT AGENT'' must be added to the warning 
signs required by 46 CFR 151.45-2(e).
    (i) Signs bearing the legend:

                   cancer--suspect agent in this area

                      protective equipment required

                        authorized personnel only

must be posted whenever hazardous operations, such as tank cleaning, are 
in progress.
    (j) A tank barge undergoing cargo transfer operations must be 
designated a ``regulated area'' having access limited to authorized 
persons and requiring a daily roster of authorized persons who may board 
the barge.
    (k) Employees engaged in hazardous operations, such as tank 
cleaning, must be provided, and be required to wear and use respiratory 
protection in accordance with the provisions of 29 CFR 1910.1017 and 
protective garments, provided clean and dry for each use, to prevent 
skin contact with liquid vinyl chloride.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 74-167R, 40 FR 
17026, Apr. 16, 1975; CGD 88-100, 54 FR 40040, Sept. 29, 1989]



Sec.  151.50-36  Argon or nitrogen.

    (a) A cargo tank that contains argon or nitrogen and that has a 
maximum allowable working pressure of 172 kPa (25 psig) or greater must 
have one of the following arrangements:
    (1) A refrigeration system that keeps the tank pressure below the 
safety relief valve operating pressure when ambient temperatures are 46 
[deg]C (115 [deg]F) air and 32 [deg]C (90 [deg]F) water.
    (2) A relief valve or pressure control valve that maintains the tank 
pressure below the setting of the tank's required safety relief valve in 
ambient temperatures of 46 [deg]C (115 [deg]F) air and 32 [deg]C (90 
[deg]F) water.
    (b) A cargo tank with a maximum allowable working pressure of less 
than 172 kPa (25 psig) is approved by the Commandant (CG-ENG) on a case 
by case basis.
    (c) Section 151.50-30 also applies to the carriage of argon or 
nitrogen.

[CGD 88-100, 54 FR 40040, Sept. 29, 1989]



Sec.  151.50-40  Additional requirements for carbon disulfide
(carbon bisulfide) and ethyl ether.

    (a) The provisions of this section are applicable if specifically 
referenced in the Special Requirements column of Table 151.05.
    (b) Cargo tanks shall be electrically bonded to the hull of the 
vessel. A vessel shall be electrically bonded to the shore piping prior 
to connecting the cargo hose. This electrical bonding shall be 
maintained until after the cargo hose has been disconnected and any 
spillage has been removed.
    (c) Pumps may be used for discharging cargo: Provided, That they are

[[Page 207]]

the vertical submerged type designed to avoid liquid pressure against 
the shaft gland and are suitable for use with the cargo.
    (d) Provisions shall be made to maintain an inert gas padding in the 
cargo tank during loading, unloading and during transit.
    (e) Provisions shall be made to prevent any leakage being washed 
into the waterways at the loading and unloading points.
    (f) The special requirements of Sec.  151.50-41 for carbon disulfide 
(carbon bisulfide) and Sec.  151.50-42 for ethyl ether shall also be 
observed.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40029, Sept. 29, 1989]



Sec.  151.50-41  Carbon disulfide (carbon bisulfide).

    (a) All openings shall be in the top of the tank.
    (b) Loading lines shall terminate near the bottom of the tank.
    (c) A standard ullage opening shall be provided for secondary and 
emergency sounding.
    (d) If a cargo discharge pump is used, it shall be inserted through 
a cylindrical well extending from the tank top to a point near the tank 
bottom. A blanket of water shall be formed in this well before 
attempting pump removal.
    (e) Water or inert gas displacement may be used for discharging 
cargo provided the cargo system is designed for the expected pressure 
and temperature. This method for discharging may be used with pressure 
type tanks only.
    (f) Adequate natural ventilation shall be provided for the voids 
around the cargo tanks while the vessel is under way. During loading and 
unloading, forced ventilation shall be used. The forced ventilation 
shall be of sufficient capacity to provide a complete change of air 
within each void space every 5 minutes. The ventilating fan shall be of 
nonsparking construction.
    (g) Because of its low ignition temperature and the close clearances 
required to arrest its flame propagation, carbon disulfide (carbon 
bisulfide) requires safeguards beyond those required for any electrical 
hazard groups.
    (h) The requirements of Sec.  151.50-40 are also applicable to the 
shipment of carbon disulfide (carbon bisulfide).

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.50-42  Ethyl ether.

    (a)(1) Gravity tanks shall be designed and tested to meet the rules 
of the American Bureau of Shipping for a head of water at least 8 feet 
above the tank top or the highest level the lading may rise, whichever 
is greater. All openings shall be in the top of the tank.
    (2) Pressure vessel type tanks shall be designed for the maximum 
pressure to which they may be subjected when pressure is used to 
discharge the cargo, but in no case shall the design pressure be less 
than 50 pounds per square inch gauge. All openings shall be in the top 
of the tank.
    (b) Adequate natural ventilation shall be provided for the voids 
around the cargo tanks while the vessel is underway. If a power 
ventilation system is installed, all blowers shall be of nonsparking 
construction. Power driven ventilation equipment shall not be located in 
the void spaces surrounding the cargo tanks.
    (c) Pressure relief valve settings shall not be less than 3 pounds 
per square inch gauge for gravity tanks. For pressure vessels, the 
relief valve setting shall not exceed the design pressure of the tank.
    (d) Inert gas displacement may be used for discharging cargo from 
pressure vessel tanks provided the cargo system is designed for the 
expected pressure and the discharge pressure does not exceed 50 pounds 
per square inch gauge or the design pressure of the tank, whichever is 
less.
    (e) No electrical equipment except for approved lighting fixtures 
shall be installed in enclosed spaces adjacent to the cargo tanks. 
Lighting fixtures must be approved for use in Class I, Group C, 
hazardous locations. The installation of electrical equipment on the 
weather deck shall comply with the requirements of part 111, subpart 
111.105 of this chapter.

[[Page 208]]

    (f) Copper, silver, mercury and magnesium or other acetylide forming 
metals and their alloys shall not be used as materials of construction 
for tanks, pipelines, valves, fittings and other items of equipment that 
may come in contact with the cargo vapor or liquid.
    (g) Precautions shall be taken to prevent the contamination of ethyl 
ether by strong oxidizing agents.
    (h) The requirements of Sec.  151.50-40 are also applicable to the 
shipment of ethyl ether.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 88-100, 54 FR 
40040, Sept. 29, 1989]



Sec.  151.50-50  Elemental phosphorus in water.

    (a) Tanks shall be designed and tested for a head equivalent to the 
design lading of phosphorus and its water blanket extended to 8 feet 
above the tank top. In addition, tank design calculations shall 
demonstrate that the tank can withstand, without rupture, a single 
loading to the highest level to which the water blanket may rise, if 
that exceeds 8 feet. Tanks shall not be less than \5/16\-inch thick.
    (b) When a water displacement method of discharge is used, pressure 
vessel type cargo tanks, designed and tested in accordance with 
Subchapter F of this chapter shall be employed. Such tanks shall be 
designed for the maximum pressure to which they may be subjected when 
water pressure is used to discharge the cargo.
    (c) Each cargo tank shall be fitted with an approved pressure vacuum 
relief valve set to discharge at a pressure not exceeding 2 pounds per 
square inch. When transferring cargo, the vent discharge shall lead 
overboard above the waterline. When pressure vessel type tanks are used, 
each tank shall be fitted with a relief valve of suitable size.
    (d) Sufficient outage shall be provided to prevent the tank from 
being liquid full at any time, but in no case shall the outage be less 
than 1 percent. When pressure vessel type tanks are used, outage need 
not be provided.
    (e) The use of compressed air to discharge cargo is prohibited.
    (f) Cargo shall be loaded at a temperature not exceeding 140 [deg]F, 
and then cooled until the water above the cargo has a temperature not 
exceeding 105 [deg]F prior to the movement of the vessel. Upon 
presentation of satisfactory proof that procedures followed will provide 
adequate safety in transportation and handling, the Commandant may 
authorize movement of the vessel following cooling of the water above 
the cargo to a temperature exceeding 105 [deg]F.
    (g) Coils in which steam or hot water is circulated to heat the 
cargo so that it may be pumped shall be located outside the cargo tanks.
    (h) A fixed ballast piping system (including a power driven pump of 
ample capacity), or other means acceptable to the Commandant shall be 
installed so that any void space surrounding the tanks may be flooded.
    (i) All openings shall be in the top of the tank and shall be fitted 
with bolted cover plates and gaskets resistant to the attack of 
phosphorus pentoxide.
    (j) All enclosed compartments containing cargo tanks shall be 
provided with effective means of ventilation.
    (k) Cargo lines shall be traced with steam piping and secured 
thereto by lagging to prevent solidification of cargo during transfer 
operations.
    (l) During cargo transfer, a water hose shall be connected to a 
water supply ready for immediate use, and any spillage of phosphorus 
shall be immediately washed down. This requirement can be met by 
facilities provided from shore.
    (m) At least two fresh air masks or self-contained breathing 
apparatus shall be stowed on board the vessel at all times for use of 
personnel entering the tanks or adjacent spaces.
    (n) Authorization from the Commandant (CG-ENG) shall be obtained to 
transport lading other than phosphorus in the cargo tanks or to have on 
board any other cargo when phosphorus is laden in the tanks.
    (o) Mechanical ventilation of sufficient capacity to insure a change 
of air within the cargo tanks every 3 minutes shall be provided during 
the inspection and maintenance of the cargo tanks.
    (p) Cargo tanks shall be electrically bonded to the hull of the 
barge. A vessel shall be electrically bonded to the shore piping prior 
to connecting the

[[Page 209]]

cargo hose. This electrical bonding shall be maintained until after the 
cargo hose has been disconnected.

[CGFR 70-10, 35 FR 3714, Feb. 24, 1970, as amended by CGD 82-063b, 48 FR 
4781, Feb. 3, 1983]



Sec.  151.50-55  Sulfur (molten).

    (a) Ventilation (cargo tank):
    (1) Cargo tank ventilation shall be provided to maintain the 
concentration of H2S below one-half of its lower explosive 
limit throughout the cargo tank vapor space for all conditions of 
carriage; i.e., below 1.85 percent by volume.
    (2) Where mechanical ventilation systems are used for maintaining 
low gas concentrations in cargo tanks, an alarm system shall be provided 
to give warning if the system fails.
    (3) Connections shall be provided to enable sampling of the 
atmosphere over the cargo in each cargo tank for analysis.
    (4) The ventilation system shall be designed and arranged to 
preclude the depositing of sulfur within the system.
    (b) Void spaces:
    (1) Openings to void spaces adjacent to cargo tanks shall be 
designed and fitted to prevent the entry of water, sulfur or cargo 
vapors.
    (2) Connections shall be provided to enable sampling and analyzing 
vapors in void spaces.
    (c) Temperature controls shall be provided in accordance with Sec.  
151.20-10 and applicable sections of Subpart 151.40 of this part. Heat 
transfer media shall be steam, and alternate media will require specific 
approval of the Commandant.

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970]



Sec.  151.50-60  Benzene.

    The person in charge of a Coast Guard inspected barge must ensure 
that the provisions of part 197, subpart C, of this chapter are applied.

[CGD 88-040, 56 FR 65006, Dec. 13, 1991]



Sec.  151.50-70  Cargoes requiring inhibition or stabilization.

    When table 151.05 refers to this section, that cargo must be--
    (a) Inhibited; or
    (b) Stabilized.

[CGD 88-100, 54 FR 40040, Sept. 29, 1989]



Sec.  151.50-73  Chemical protective clothing.

    When table 151.05 refers to this section, the following apply:
    (a) The person in charge of cargo handling operations shall ensure 
that the following chemical protective clothing constructed of materials 
resistant to permeation by the cargo being handled is worn by all 
personnel engaged in an operation listed in paragraph (b) of this 
section:
    (1) Splash protective eyewear.
    (2) Long-sleeved gloves.
    (3) Boots or shoe covers.
    (4) Coveralls or lab aprons.

    Note: ``Guidelines for the Selection of Chemical Protective 
Clothing'', Third Edition, 1987, available from the American Conference 
of Governmental Industrial Hygienists, 1330 Kemper Meadow Drive, 
Cincinnati, OH 45240-1634, provides information on the proper clothing 
for the cargo being handled.

    (b) The section applies during the following operations:
    (1) Sampling cargo.
    (2) Transferring cargo.
    (3) Making or breaking cargo hose connections.
    (4) Gauging a cargo tank, unless gauging is by closed system.
    (5) Opening cargo tanks.
    (c) Coveralls or lab aprons may be replaced by splash suits or 
aprons constructed of light weight or disposable materials if, in the 
judgment of the person in charge of cargo handling operations,
    (1) Contact with the cargo is likely to occur only infrequently and 
accidentally; and
    (2) The splash suit or apron is disposed of immediately after 
contamination.
    (d) Splash protective eyewear must be tight-fitting chemical-splash 
goggles, face shields, or similar items intended specifically for eye 
protection from chemical splashing or spraying.
    (e) The person in charge of cargo handling operations shall ensure 
that each person in the vicinity of an operation listed in the paragraph 
(b) of this section or in the vicinity of tanks, piping, or pumps being 
used to transfer the

[[Page 210]]

cargo wears splash protective eyewear under paragraph (d) of this 
section.

[CGD 88-100, 54 FR 40040, Sept. 29, 1989, as amended by USCG-1999-6216, 
64 FR 53227, Oct. 1, 1999]



Sec.  151.50-74  Ethylidene norbornene.

    When Table 151.05 refers to this section, the following apply:
    (a) 151.50-5 (g) and (h)
    (b) Rubber hoses or fittings may not be used in transfer operations.

[CGD 80-001, 46 FR 63279, Dec. 31, 1981]



Sec.  151.50-75  Ferric chloride solution.

    A containment system (cargo tank piping system, venting system, and 
gauging system) carrying this solution must be lined with rubber, 
corrosion resistant plastic, or a material approved by the Commandant 
(CG-ENG).

[CGD 80-001, 46 FR 63279, Dec. 31, 1981, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983; CGD 88-100, 54 FR 40041, Sept. 29, 1989; 55 FR 
17276, Apr. 24, 1990]



Sec.  151.50-76  Hydrochloric acid, spent (NTE 15%).

    (a)(1) Gravity type cargo tanks must be designed and tested to meet 
the rules of the American Bureau of Shipping for a head of water at 
least 8 feet above the tank top or the highest level the lading may 
rise, whichever is greater. The plate thickness of any part of the tank 
may not be less than three-eighths inch. A shell plating of a barge may 
not be on the boundary of any part of the cargo tank.
    (2) Gravity tank vents must:
    (i) Terminate above the weatherdeck, clear of all obstructions and 
away from any from any source of ignition; and
    (ii) Be fitted with a single flame screen or two fitted flame 
screens as described in Sec.  151.03-25. Neither a shut-off valve nor a 
frangible disk may be fitted in the vent lines.
    (b) Openings in the tanks are prohibited below deck, except for 
access openings used for inspection and maintenance of tanks, or unless 
otherwise specifically approved by the Commandant (CG-ENG). Openings 
must be fitted with bolted cover plates and acid-resistant gaskets.
    (c) Where special arrangements are approved by the Commandant (CG-
ENG) to permit a pump suction to be led from the bottom of the tank, the 
filling and discharge lines must be fitted with shutoff valves located 
above the weatherdeck or operable from it.
    (d) The outage may not be less than 1 percent.
    (e) An enclosed compartment containing, or a compartment adjacent 
to, a cargo tank:
    (1) May have no electrical equipment that does not meet or exceed 
class I-B electrical requirements; and
    (2) Must have at least one gooseneck vent of 2.5 inch diameter or 
greater. The structural arrangement of the compartment must provide for 
the free passage of air and gases to the vent or vents.
    (f) No lights may be used during the cargo transfer operations, 
except installed electric or portable battery lights. Smoking is 
prohibited and the person in charge of cargo transfer shall ensure that 
``No Smoking'' signs are displayed during cargo transfer operations.
    (g) Tanks approved for the transportation of acid cargoes subject to 
this section may not be used for the transportation of any other 
commodity, except upon authorization by the Commandant (CG-ENG).
    (h) Each cargo tank must be examined internally at least once in 
every 4 years. If the lining of the cargo tank has deteriorated in 
service or is not in place, the Marine Inspector may require the tank to 
be tested by such nondestructive means as he may consider necessary to 
determine its condition.

[CGD 80-001, 46 FR 63279, Dec. 31, 1981, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983]



Sec.  151.50-77  Fluorosilicic acid (30% or less) 
(hydrofluorosilicic acid).

    (a) Hydrofluorosilicic acid must be carried in gravity or pressure 
type cargo tanks independent of the vessel's structure. The tanks must 
be lined with rubber or other equally suitable material approved by the 
Commandant (CG-ENG). See Sec.  151.15-3(f)(2).
    (b) Notwithstanding the provisions of Sec.  151.50-20(b)(3), no 
compressed air may be used to discharge hydrofluorosilicic

[[Page 211]]

acid from gravity type cargo tanks unless:
    (1) The tanks are of cylindrical shape with dished heads, and
    (2) The air pressure does not exceed:
    (i) The design pressure of the tank, and
    (ii) 10 pounds per square inch gauge. The tanks must be fitted with 
pressure relief devices.
    (c) During cargo transfer, a water hose must be connected to a water 
supply and be ready for immediate use. Any leakage or spillage of acid 
must be immediately washed down. This requirement can be met by 
facilities provided from shore.

[CGD 80-001, 46 FR 63279, Dec. 31, 1981, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983; CGD 92-100, 59 FR 17028, Apr. 11, 1994]



Sec.  151.50-79  Methyl acetylene-propadiene mixture.

    (a) The composition of the methyl acetylene-propadiene mixture at 
loading must be within one of the following sets of composition limits:
    (1) Composition 1 is:
    (i) Maximum methyl acetylene to propadiene molar ratio of 3 to 1;
    (ii) Maximum combined concentration of methyl acetylene and 
propadiene of 65 mole percent;
    (iii) Minimum combined concentration of propane, butane, and 
isobutane of 24 mole percent, of which at least one-third (on a molar 
basis) must be butanes and one-third propane; and
    (iv) Maximum combined concentration of propylene and butadiene of 10 
mole percent.
    (2) Composition 2 is:
    (i) Maximum methyl acetylene and propadiene combined concentration 
of 30 mole percent;
    (ii) Maximum methyl acetylene concentration of 20 mole percent;
    (iii) Maximum propadiene concentration of 20 mole percent;
    (iv) Maximum propylene concentration of 45 mole percent;
    (v) Maximum butadiene and butylenes combined concentration of 2 mole 
percent;
    (vi) Minimum saturated C4 hydrocarbon concentration of 4 
mole percent; and
    (vii) Minimum propane concentration of 25 mole percent.
    (b) A barge carrying a methyl acetylene-propadiene mixture must have 
a refrigeration system that does not compress the cargo vapor or have a 
refrigeration system with the following features:
    (1) A vapor compressor that does not raise the temperature and 
pressure of the vapor above 60 [deg]C (140 [deg]F) and 1.72 MPa gauge 
(250 psig) during its operations, and that does not allow vapor to 
stagnate in the compressor while it continues to run.
    (2) At the discharge piping from each compressor stage or each 
cylinder in the same stage of a reciprocating compressor:
    (i) Two temperature actuated shutdown switches set to operate at 60 
[deg]C (140 [deg]F) or less;
    (ii) A pressure actuated shutdown switch set to operate at 1.72 MPa 
gauge (250 psig) or less; and
    (iii) A safety relief valve set to relieve at 1.77 MPa gauge (256 
psig) or less anywhere except into the compressor suction line.
    (c) The piping system, including the cargo refrigeration system, for 
tanks to be loaded with methyl acetylene-propadiene mixture must be 
completely separate from piping and refrigeration systems for other 
tanks. If the piping system for the tanks to be loaded with methyl 
acetylene-propadiene mixture is not independent, the required piping 
separation must be accomplished by the removal of spool pieces, valves 
or other pipe sections and the installation of blank flanges at these 
locations. The required separation applies to all liquid and vapor 
piping, liquid and vapor vent lines and any other possible connections, 
such as common inert gas supply lines.

[CGD 80-001, 46 FR 63279, Dec. 31, 1981, as amended by USCG-2014-0688, 
79 FR 58284, Sept. 29, 2014]



Sec.  151.50-80  Nitric acid (70% or less).

    (a) Tanks, cargo piping, valves, fittings, and flanges (where 
exposed to the acid) must be lined with nitric acid resistant rubber or 
fabricated from nitric acid resistant stainless steel. See Sec.  151.15-
3(f)(2).
    (b) During cargo transfer, a water hose must be connected to a water 
supply, ready for immediate use. Any

[[Page 212]]

leakage or spillage of acid must be immediately washed down. This 
requirement can be met by facilities provided from shore.
    (c) Nitric acid contaminated by other chemicals, oils, solvents, 
etc. may not be transported in bulk without an authorization from the 
Commandant (CG-ENG).

[CGD 80-001, 46 FR 63280, Dec. 31, 1981, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983; CGD 88-100, 54 FR 40041, Sept. 29, 1989]



Sec.  151.50-81  Special operating requirements for heat sensitive 
cargoes.

    When table 151.05 refers to this section, the following apply to the 
cargo:
    (a) Must not be carried in a tank equipped with heating coils unless 
the heating supply to the coils is disconnected.
    (b) Must not be carried in a tank adjacent to another tank 
containing an elevated temperature cargo.
    (c) Must not be carried in a deck tank.

[CGD 80-001, 46 FR 63280, Dec. 31, 1981, as amended by CGD 88-100, 54 FR 
40041, Sept. 29, 1989]



Sec.  151.50-84  Sulfur dioxide.

    (a) Sulfur dioxide that is transported under the provisions of this 
part may not contain more than 100 ppm of water.
    (b) Cargo piping must be at least Schedule 40 pipe.
    (c) Flanges must be 150 lb. A.N.S.I. Standard minimum with tongue 
and groove or raised face.
    (d) A cargo tank must:
    (1) Meet the requirements of a Class I welded pressure vessel;
    (2) Be designed for a maximum allowable working pressure of at least 
125 psig;
    (3) Be hydrostatically tested every two years to at least 188 psig;
    (4) Be provided with one or more manholes that are fitted with a 
cover sized not less than 15 inches by 23 inches or 13 inches nominal 
diameter, located above the maximum liquid level, and as close as 
possible to the top of the tank;
    (5) Have no openings other than those required in paragraph (d)(4) 
of this section;
    (6) Have no liquid level gauges other than closed or indirect 
gauges;
    (7) Have all valves and the closed gauge that is required by Table 
151.05 bolted to the cover or covers that are required in paragraph 
(d)(4) of this section;
    (8) Have a metal housing that is fitted with a drain and vent 
connection protecting all valves and the closed gauge within this 
housing against mechanical damage;
    (9) Have all safety relief valves discharging into the protective 
housing;
    (10) Not be interconnected with another cargo tank by piping or 
manifold that carriers cargo liquid, except vapor lines connected to a 
common header, and
    (11) Have an excess flow valve that is located on the inside of the 
tank for every liquid and vapor connection, except the safety relief 
valve;
    (12) Have no bypass opening on any excess flow valve.
    (e) Cargo transfer operations:
    (1) May not be conducted with more than one cargo tank at a time 
unless each tank is filled from or discharged to shore tanks through 
separate lines;
    (2) Must be conducted with connections between fixed barge piping 
and shore piping of either Schedule 40 pipe having flexible metallic 
joints that meet Sec.  151.04-5(h) or of flexible metallic hose that is 
acceptable to the Commandant (CG-ENG);
    (3) From barge to shore must be by pressurization with an oil free, 
non-reactive gas that has a maximum of 100 ppm moisture;
    (4) Must be conducted with vapor return to shore connections that 
ensure that all vapor is returned to shore; and
    (5) Must be conducted with every person on the barge carrying a 
respiratory protective device that protects the wearer against sulfur 
dioxide vapors and provides respiratory protection for emergency escape 
from a contaminated area that results from cargo leakage.
    (f) Respiratory protective equipment must be of a size and weight 
that allows unrestricted movement and wearing of a lifesaving device.
    (g) After the completion of cargo transfer, all liquid sulfur 
dioxide in the cargo piping must be removed and

[[Page 213]]

cargo transfer piping must be disconnected at the cargo tanks. After the 
cargo piping is disconnected, both ends of the line must be plugged or 
fitted with blind flanges.

[CGD 80-001, 46 FR 63280, Dec. 31, 1981, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983; CGD 88-100, 54 FR 40041, Sept. 29, 1989; 55 FR 
17276, Apr. 24, 1990; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  151.50-86  Alkyl (C7-C9) nitrates.

    (a) The carriage temperature of octyl nitrates must be maintained 
below 100 [deg]C (212 [deg]F) in order to prevent the occurrence of a 
self-sustaining exothermic decomposition reaction.
    (b) Octyl nitrates may not be carried in a deck tank unless the tank 
has a combination of insulation and a water deluge system sufficient to 
maintain the tank's cargo temperature below 100 [deg]C (212 [deg]F) and 
the cargo temperature rise at or below 1.5 [deg]C(2.7 [deg]F)/hour, for 
a fire of 650 [deg]C (1200 [deg]F).

[CGD 88-100, 54 FR 40040, Sept. 29, 1989; CGD 92-100, 59 FR 17028, Apr. 
11, 1994]



    Subpart 151.55_Special Requirements for Materials of Construction



Sec.  151.55-1  General.

    (a) This section provides special requirements for the materials of 
construction of equipment that may come into contact with various 
cargoes. Table 151.05 contains specific requirements for various 
cargoes.
    (b) Copper, copper alloys, zinc, and aluminum shall not be used as 
materials of construction for tanks, pipelines, valves, fittings, and 
other items of equipment that may come in contact with the cargo liquid 
or vapor. (Equivalent to Sec.  151.56-1(a),(b), and (c).)
    (c) Copper, copper alloys, zinc, galvanized steel, and mercury shall 
not be used as materials of construction for tanks, pipelines, valves, 
fittings, and other items of equipment that may come in contact with the 
cargo liquid or vapor. (Equivalent to Sec.  151.56-1(b),(c), and (g).)
    (d) Aluminum, magnesium, zinc, and lithium shall not be used as 
materials of construction for tanks, pipelines, valves, fittings, and 
other items of equipment that may come in contact with the cargo liquid 
or vapor. (Equivalent to Sec.  151.56-1(a),(c), and (d).)
    (e) Copper and copper bearing alloys shall not be used as materials 
of construction for tanks, pipelines, valves, fittings, and other items 
of equipment that may come in contact with the cargo liquid or vapor. 
(Equivalent to Sec.  151.56-1(b).)
    (f) Aluminum or copper or alloys of either shall not be used as 
materials of construction for tanks, pipelines, valves, fittings, and 
other items of equipment that may come in contact with the cargo vapor 
or liquid. (Equivalent to Sec.  151.56-1(a) and (b).)
    (g) Aluminum, stainless steel, or steel covered with a suitable 
protective lining or coating shall be used as materials of construction 
for tanks, pipelines, valves fittings, and other items of equipment that 
may come in contact with the cargo liquid or vapor. (Equivalent to Sec.  
151.58-1(a).)
    (h) Alkaline or acidic materials, such as caustic soda or sulfuric 
acid, should not be allowed to contaminate this cargo.
    (i) For concentrations of 98 percent or greater, aluminum or 
stainless steel shall be used as materials of construction. For 
concentrations of less than 98 percent, 304L or 316 stainless steel 
shall be used as materials of construction.
    (j) Zinc, alloys that have more than 10 percent zinc by weight, and 
aluminum may not be used as materials of construction for tanks, 
pipelines, valves, fittings, and other items of equipment that may come 
in contact with cargo liquid or vapor. (Equivalent to Sec.  151.56-1(a) 
and (c).)

[CGFR 70-10, 35 FR 3714, Feb. 25, 1970, as amended by CGD 73-275R, 41 FR 
3087, Jan. 21, 1976; CGD 75-223, 42 FR 8378, Feb. 10, 1977; CGD 88-100, 
54 FR 40041, Sept. 29, 1989]



           Subpart 151.56_Prohibited Materials of Construction



Sec.  151.56-1  Prohibited materials.

    When one of the following paragraphs of this section is referenced 
in table 151.05, the materials listed in that paragraph may not be used 
in components that contact the cargo or its vapor:
    (a) Aluminum or aluminum alloys.

[[Page 214]]

    (b) Copper or copper alloys.
    (c) Zinc, galvanized steel, or alloys having more than 10 percent 
zinc by weight.
    (d) Magnesium.
    (e) Lead.
    (f) Silver or silver alloys.
    (g) Mercury.

[CGD 88-100, 54 FR 40041, Sept. 29, 1989]



            Subpart 151.58_Required Materials of Construction



Sec.  151.58-1  Required materials.

    When one of the following paragraphs of this section is referenced 
in table 151.05, only those materials listed in that paragraph may be 
used in components that contact the cargo or its vapor:
    (a) Aluminum, stainless steel, or steel covered with a protective 
lining or coating. (See Sec.  151.15-3(f)(2).)
    (b)-(c) [Reserved]
    (d) Solid austenitic stainless steel.
    (e) Stainless steel or steel covered with a suitable protective 
lining or coating. (See Sec.  151.15-3(f)(2).)

[CGD 88-100, 54 FR 40041, Sept. 29, 1989]

                           PART 152 [RESERVED]



PART 153_SHIPS CARRYING BULK LIQUID, LIQUEFIED GAS, OR COMPRESSED
GAS HAZARDOUS MATERIALS--Table of Contents



                            Subpart A_General

Sec.
153.0 Availability of materials.
153.1 Applicability.
153.2 Definitions and acronyms.
153.3 Right of appeal.
153.4 Incorporation by reference.
153.7 Ships built before December 27, 1977 and non-self-propelled ships 
          built before July 1, 1983: Application.
153.8 Procedures for requesting an endorsed Certificate of Inspection.
153.9 Foreign flag vessel endorsement application.
153.10 Procedures for requesting alternatives and waivers; termination 
          of waivers.
153.12 IMO Certificates for United States Ships.
153.15 Conditions under which the Coast Guard issues a Certificate of 
          Inspection or Certificate of Compliance.
153.16 Requirements for foreign flag vessel permits.
153.30 Special area endorsement.
153.40 Determination of materials that are hazardous.

                     Subpart B_Design and Equipment

                       General Vessel Requirements

153.190 Stability requirements.
153.201 Openings to accommodation, service or control spaces.
153.208 Ballast equipment.
153.209 Bilge pumping systems.
153.214 Personnel emergency and safety equipment.
153.215 Safety equipment lockers.
153.216 Shower and eyewash fountains.
153.217 Access to enclosed spaces and dedicated ballast tanks.
153.219 Access to double bottom tanks serving as dedicated ballast 
          tanks.

                        Cargo Containment Systems

153.230 Type I system.
153.231 Type II system.
153.232 Type III system.
153.233 Separation of tanks from machinery, service and other spaces.
153.234 Fore and aft location.
153.235 Exceptions to cargo piping location restrictions.
153.236 Prohibited materials.
153.238 Required materials.
153.239 Use of cast iron.
153.240 Insulation.

                               Cargo Tanks

153.250 Double-bottom and deep tanks as cargo tanks.
153.251 Independent cargo tanks.
153.252 Special requirement for an independent cargo tank.
153.254 Cargo tank access.
153.256 Trunks, domes, and openings of cargo tanks.
153.266 Tank linings.

               Piping Systems and Cargo Handling Equipment

153.280 Piping system design.
153.281 Piping to independent tanks.
153.282 Cargo filling lines.
153.283 Valving for cargo piping.
153.284 Characteristics of required quick closing valves.
153.285 Valving for cargo pump manifolds.
153.292 Separation of piping systems.
153.294 Marking of piping systems.
153.296 Emergency shutdown stations.
153.297 Emergency actuators at the point of cargo control.

                    Cargo Handling Space Ventilation

153.310 Ventilation system type.
153.312 Ventilation system standards.

[[Page 215]]

153.314 Ventilation of spaces not usually occupied.
153.316 Special cargo pumproom ventilation rate.

                             Cargo Pumprooms

153.330 Access.
153.332 Hoisting arrangement.
153.333 Cargo pump discharge pressure gauge.
153.334 Bilge pumping systems.
153.336 Special cargo pump or pumproom requirements.

                          Cargo Venting Systems

153.350 Location of B/3 vent discharges.
153.351 Location of 4 m vent discharges.
153.352 B/3 and 4 m venting system outlets.
153.353 High velocity vents.
153.354 Venting system inlet.
153.355 PV venting systems.
153.358 Venting system flow capacity.
153.360 Venting system restriction.
153.361 Arrangements for removal of valves from venting systems having 
          multiple relief valves.
153.362 Venting system drain.
153.364 Venting system supports.
153.365 Liquid overpressurization protection.
153.368 Pressure-vacuum valves.
153.370 Minimum relief valve setting for ambient temperature cargo 
          tanks.
153.371 Minimum relief valve setting for refrigerated cargo tanks.
153.372 Gauges and vapor return for cargo vapor pressures exceeding 100 
          kPa (approx. 14.7 psia).

                          Cargo Gauging Systems

153.400 General requirements for gauges.
153.404 Standards for containment systems having required closed gauges.
153.406 Standards for containment systems having required restricted 
          gauges.
153.407 Special requirements for sounding tube gauges.
153.408 Tank overflow control.
153.409 High level alarms.

                    Cargo Temperature Control Systems

153.430 Heat transfer systems; general.
153.432 Cooling systems.
153.434 Heat transfer coils within a tank.
153.436 Heat transfer fluids: compatibility with cargo.
153.438 Cargo pressure or temperature alarms required.
153.440 Cargo temperature sensors.

        Special Requirements for Flammable or Combustible Cargoes

153.460 Fire protection systems.
153.461 Electrical bonding of independent tanks.
153.462 Static discharges from inert gas systems.
153.463 Vent system discharges.
153.465 Flammable vapor detector.
153.466 Electrical equipment.

               Design and Equipment for Pollution Control

153.470 System for discharge of NLS residue to the sea: Categories A, B, 
          C, and D.
153.480 Stripping quantity for Category B and C NLS tanks on ships built 
          after June 30, 1986: Categories B and C.
153.481 Stripping quantities and interim standards for Category B NLS 
          tanks on ships built before July 1, 1986: Category B.
153.482 Stripping quantities and interim standards for Category C NLS 
          tanks on ships built before July 1, 1986: Category C.
153.483 Restricted voyage waiver for Category B and C NLS tanks on ships 
          built before July 1, 1986: Category B and C.
153.484 Prewash equipment.
153.486 Design and equipment for removing NLS residue by ventilation: 
          Categories A, B, C, and D.
153.488 Design and equipment for tanks carrying high melting point NLSs: 
          Category B.
153.490 Cargo Record Book and Approved Procedures and Arrangements 
          Manual: Categories A, B, C, and D.
153.491 Waiver of certain equipment for dedicated cargo tanks.

                          Special Requirements

153.500 Inert gas systems.
153.501 Requirement for dry inert gas.
153.515 Special requirements for extremely flammable cargoes.
153.520 Special requirements for carbon disulfide.
153.525 Special requirements for unusually toxic cargoes.
153.526 Toxic vapor detectors.
153.527 Toxic vapor protection.
153.530 Special requirements for alkylene oxides.
153.545 Special requirements for liquid sulfur.
153.554 Special requirements for acids.
153.555 Special requirements for inorganic acids.
153.556 Special requirements for sulfuric acid and oleum.
153.557 Special requirements for hydrochloric acid.
153.558 Special requirements for phosphoric acid.
153.559 Special requirements for nitric acid (less than 70 percent).
153.560 Special requirements for Alkyl (C7-C9) nitrates.
153.565 Special requirements for temperature sensors.

[[Page 216]]

153.602 Special requirements for cargoes reactive with water.

                         Testing and Inspection

153.806 Loading information.
153.808 Examination required for a Certificate of Compliance.
153.809 Procedures for having the Coast Guard examine a vessel for a 
          Certificate of Compliance.
153.812 Inspection for Certificate of Inspection.

                          Subpart C_Operations

                     Documents and Cargo Information

153.900 Certificates and authorization to carry a bulk liquid hazardous 
          material.
153.901 Documents: Posting, availability, and alteration.
153.902 Expiration and invalidation of the Certificates of Compliance.
153.903 Operating a United States ship in special areas: Categories A, 
          B, and C.
153.904 Limitations in the endorsement.
153.905 Regulations required to be on board.
153.907 Cargo information.
153.908 Cargo viscosity and melting point information; measuring cargo 
          temperature during discharge: Categories A, B, and C.
153.909 Completing the Cargo Record Book and record retention: 
          Categories A, B, C, and D.
153.910 Cargo piping plan.
153.912 Certficate of inhibition or stabilization.

                 General Cargo Operational Requirements

153.920 Cargo quantity limitations.
153.921 Explosives.
153.923 Inerting systems.

                          General Vessel Safety

153.930 Cargo antidotes.
153.931 Obstruction of pumproom ladderways.
153.932 Goggles and protective clothing.
153.933 Chemical protective clothing.
153.934 Entry into spaces containing cargo vapor.
153.935 Opening of tanks and cargo sampling.
153.935a Storage of cargo samples.
153.936 Illness, alcohol, drugs.

                     Marking of Cargo Transfer Hose

153.940 Standards for marking of cargo hose.

                        Cargo Transfer Procedures

153.953 Signals during cargo transfer.
153.955 Warning signs during cargo transfer.
153.957 Persons in charge of transferring liquid cargo in bulk or 
          cleaning cargo tanks.
153.959 Approval to begin transfer operations required.
153.964 Discharge by gas pressurization.
153.966 Discharge by liquid displacement.
153.968 Cargo transfer conference.
153.970 Cargo transfer piping.
153.972 Connecting a cargo hose.
153.975 Preparation for cargo transfer.
153.976 Transfer of packaged cargo or ship's stores.
153.977 Supervision of cargo transfer.
153.979 Gauging with a sounding tube.
153.980 Isolation of automatic closing valves.
153.981 Leaving room in tank for cargo expansion.
153.983 Termination procedures.

                        Special Cargo Procedures

153.1000 Special operating requirements for cargoes reactive with water.
153.1002 Special operating requirements for heat sensitive cargoes.
153.1003 Prohibited carriage in deck tanks.
153.1004 Inhibited and stabilized cargoes.
153.1010 Alkylene oxides.
153.1011 Changing containment systems and hoses to and from alkylene 
          oxide service.
153.1020 Unusually toxic cargoes.
153.1025 Motor fuel antiknock compounds.
153.1035 Acetone cyanohydrin or lactonitrile solutions.
153.1040 Carbon disulfide.
153.1045 Inorganic acids.
153.1046 Sulfuric acid.
153.1052 Carriage of other cargoes in acid tanks.
153.1060 Benzene.
153.1065 Sodium chlorate solutions.

 Approval of Surveyors and Handling of Categories A, B, C, and D Cargo 
                             and NLS Residue

153.1100 Responsibility of the person in charge.
153.1101 Procedures for getting a Surveyor: Approval of Surveyors.
153.1102 Handling and disposal of NLS residue: Categories A, B, C, and 
          D.
153.1104 Draining of cargo hose: Categories A, B, C, and D.
153.1106 Cleaning agents.
153.1108 Heated prewash for solidifying NLS, high viscosity NLS and 
          required prewashes of NLS whose viscosity exceeds 25 mPa sec 
          at 20 [deg]C: Categories A, B, and C.
153.1112 Prewash for tanks containing Category A NILS residue.
153.1114 Conditions under which a prewash may be omitted: Categories A, 
          B, and C.
153.1116 Prewash for tanks unloaded without following the approved 
          Procedures and Arrangements Manual: Category B and C.

[[Page 217]]

153.1118 Prewash of Categories B and C cargo tanks not meeting stripping 
          standards: Categories B and C.
153.1119 When to prewash and discharge NLS residues from a prewash; 
          unloading an NLS cargo in a country whose Administration is 
          not signatory to MARPOL 73/78: Categories A, B, and C.
153.1120 Procedures for tank prewash: Categories A, B, and C.
153.1122 Discharges of NLS residue from tank washing other than a 
          prewash: Categories A, B, and C.
153.1124 Discharges of Category D NLS residue.
153.1126 Discharge of NLS residue from a slop tank to the sea: 
          Categories A, B, C, and D.
153.1128 Discharge of NLS residue from a cargo tank to the sea: 
          Categories A, B, C, and D.
153.1130 Failure of slops discharge recording equipment; operating with, 
          reporting failures, and replacing pollution equipment: 
          Category A, B, C, D.
153.1132 Reporting spills and non-complying discharges: Category A, B, 
          C, and D.

                               Maintenance

153.1500 Venting system rupture disks.
153.1502 Fixed ballast relocation.
153.1504 Inspection of personnel emergency and safety equipment.

  Subpart D_Test and Calculation Procedures for Determining Stripping 
          Quantity, Clingage NLS Residue, and Total NLS Residue

153.1600 Equipment required for conducting the stripping quantity test.
153.1602 Test procedure for determining the stripping quantity.
153.1604 Determining the stripping quantity from the test results.
153.1608 Calculation of total NLS residue and clingage NLS residue.

Table 1 to Part 153--Summary of minimum requirements
Table 2 to Part 153--Cargoes Not Regulated Under Subchapters D or O of 
          This Chapter When Carried in Bulk on Non-Oceangoing Barges
Appendix I to Part 153 [Reserved]
Appendix II to Part 153--Metric Units Used in Part 153

    Authority: 46 U.S.C. 3703; Department of Homeland Security 
Delegation No. 0170.1. Section 153.40 issued under 49 U.S.C. 5103. 
Sections 153.470 through 153.491, 153.1100 through 153.1132, and 
153.1600 through 153.1608 also issued under 33 U.S.C. 1903 (b).

    Source: CGD 73-96, 42 FR 49027, Sept. 26, 1977, unless otherwise 
noted.

    Editorial Note: Nomenclature changes to part 153 appear by CGD-95-
072, 60 FR 50465, Sept. 29, 1995, CGD-96-041, 61 FR 50732, Sept. 27, 
1996, USCG-2009-0702, 74 FR 49235, Sept. 25, 2009, and USCG-2012-0832, 
77 FR 59784, Oct. 1, 2012.



                            Subpart A_General



Sec.  153.0  Availability of materials.

    (a) Various sections in this part refer to the following documents 
which are incorporated in Annex II of MARPOL 73/78.
    (1) IMO Standards for Procedures and Arrangements for the Discharge 
of Noxious Liquid Substances, Resolution MEPC 18(22), 1985 in effect on 
April 6, 1987.
    (2) IMO International Code for the Construction and Equipment of 
Ships Carrying Dangerous Chemicals in Bulk, Resolution MEPC 19(22), 1985 
in effect on April 6, 1987.
    (3) IMO Code for the Construction and Equipment of Ships Carrying 
Dangerous Chemicals in Bulk, Resolution MEPC 20(22), 1985 in effect on 
April 6, 1987.
    (b) The IMO documents listed in this section are available from the 
following:
    (1) IMO Secretariat, Publications section, 4 Albert Embankment, 
London SE1 7SR, United Kingdom, Telex 23588;
    (2) New York Nautical Instrument and Service Company, 140 West 
Broadway, New York, NY 10013;
    (3) Baker, Lyman & Company, 3220 South I-10 Service Road, Metairie, 
LA 70001.
    (4) UNZ & Company, 190 Baldwin Avenue, Jersey City, NJ 07306.
    (5) Southwest Instrument Company, 235 West 7th Street, San Pedro, CA 
90731.
    (6) Marine Education Textbooks, 124 North Van Avenue, Houma, LA 
70363-5895.

[CGD 81-101, 52 FR 7777, Mar. 12, 1987, as amended by CGD 92-100, 59 FR 
17028, Apr. 11, 1994]



Sec.  153.1  Applicability.

    This part applies to the following:
    (a) All United States self-propelled ships and those foreign self-
propelled ships operating in United States waters that carry in bulk a 
cargo listed in

[[Page 218]]

Table 1 or allowed in a written permission under Sec.  153.900(d), 
unless--
    (1) The ship is carrying the cargo under 33 CFR part 151;
    (2) The ship is carrying the cargo in a portable tank under subpart 
98.30 or 98.33 of this chapter; or
    (3) The ship is an offshore supply vessel carrying the cargo under 
subpart 98.31 of the chapter; or
    (b) All United States oceangoing non-self-propelled ships and those 
foreign non-self-propelled ships operating in United States waters that 
carry in bulk a Category A, B, or C NLS cargo listed in Table 1 or 
allowed in a written permission under Sec.  153.900(d), unless--
    (1) The ship is carrying the cargo under 33 CFR part 151;
    (2) The ship is carrying the cargo in a portable tank under subpart 
98.30 or 98.33 of this chapter;
    (3) The ship is an offshore supply vessel carrying the cargo under 
subpart 98.31 of this chapter; or
    (4) The ship's Certificate of Inspection is endorsed for a limited 
short protected coastwise route and the ship is constructed and 
certificated primarily for service on an inland route.
    (c) All ships that carry a bulk liquid, liquefied gas, or compressed 
gas cargo that is not--
    (1) Listed in Table 1 of this part;
    (2) Listed in Table 2 of this part;
    (3) Carried under a written permission granted under Sec.  
153.900(d);
    (4) Carried under part 30 through 35, 98, 151, or 154 of this 
chapter; or
    (5) Carried as an NLS under 33 CFR part 151.

[CGD 81-101, 52 FR 7777, Mar. 12, 1987, as amended by CGD 84-025, 53 FR 
15844, May 4, 1988; CGD 81-101, 53 FR 28974, Aug. 1, 1988 and 54 FR 
12629, Mar. 28, 1989; CGD 84-043, 55 FR 37413, Sept. 11, 19905; CGD 96-
041, 61 FR 50732, Sept. 27, 1996]



Sec.  153.2  Definitions and acronyms.

    As used in this part:
    Accommodation spaces means halls, dining rooms, lounges, lavatories, 
cabins, staterooms, offices, hospitals, cinemas, game and hobby rooms, 
pantries containing no cooking appliances, and similar permanently 
enclosed spaces.
    Adequate reception facility means each facility certified as 
adequate under 33 CFR 158.160 and each facility provided by a 
Administration signatory to MARPOL 73/78 under Regulation 7 of Annex II.
    Annex II means Annex II to MARPOL 73/78 and is the Annex to MARPOL 
73/78 regulating the discharge of noxious liquid substances to the sea.
    B means the breadth of the vessel and is defined in Sec.  42.13-
15(d) of this chapter.
    Built means that a ship's construction has reached any of the 
following stages:
    (1) The keel is laid.
    (2) The mass of the partially assembled ship is 50,000 kg.
    (3) The mass of the partially assembled ship is one percent of the 
estimated mass of the completed ship.
    Cargo area means that part of a vessel that includes the cargo 
tanks, spaces adjacent to the cargo tanks and the part of the deck over 
the cargo tanks and adjacent spaces.
    Cargo containment system means a cargo tank, its cargo piping 
system, its venting system, and its gauging system.
    Cargo handling space means an enclosed space that must be entered 
during a routine loading, carriage, or discharge of cargo and that 
contains an element of the cargo containment system having a seal or 
packing to prevent the escape of cargo, such as a valve, cargo pump, or 
cargo vapor compressor.
    Cargo piping system means a tankship's permanently installed piping 
arrangement, including any valves and pumps, that carries cargo to or 
from a cargo tank.
    Cargo tank means a tank that:
    (1) Is part of or permanently affixed to a tankship; and
    (2) Carries a cargo described in part 153, table 1--SUMMARY OF 
MINIMUM REQUIREMENTS in any quantity, including residual liquid or 
vapor.
    Certificate of Compliance means a certificate issued by the Coast 
Guard that a foreign flag vessel had been examined and found to comply 
with the regulations in this chapter.
    Closed gauging system means an arrangement for gauging the amount of 
cargo in a tank, such as a float and tape or a magnetically coupled 
float and indicator, that does not have any

[[Page 219]]

opening through which cargo vapor or liquid can escape.
    Combustible is defined in Sec.  30.10-15 of this chapter.
    Commandant means Commandant (staff symbol), Attn: (Staff title), 
U.S. Coast Guard Stop (mailing code) 2703 Martin Luther King Jr. Avenue 
SE., Washington, DC 20593-(mailing code).

The term is often followed by a mailing code in parentheses. The mailing 
address should include any mailing code and should be written as 
follows:

Commandant (mailing code), U.S. Coast Guard, 2100 2nd Street SW., Stop 
7126, Washington, DC 20593-7126.

    Control space is defined in Sec.  30.10-19a of this chapter.
    Cycle, means that the tank washing machine progresses through 
complete rotations until it reaches an orientation identical to its 
starting orientation.

    Note: For a typical one or two nozzle tank washing machine that 
rotates in both the horizontal and vertical planes though more slowly in 
one than the other, a cycle would be at least one rotation in each plane 
of rotation.

    Dedicated ballast tank means a tank that is used only for ballast.
    Emergency shutdown station means a part of the tankship where the 
required emergency shutdown controls are clustered.
    Flammable is defined in Sec.  30.10-22 of this chapter.
    Forward perpendicular is defined in Sec.  42.13-15(b) of this 
chapter.
    Hazardous material means a liquid material or substance that is--
    (1) Flammable or combustible;
    (2) Designated a hazardous substance under section 311(b) of the 
Federal Water Pollution Control Act (33 U.S.C. 1321); or
    (3) Designated a hazardous material under 49 U.S.C. 5103.

    Note: The Environmental Protection Agency designates hazardous 
substances in 40 CFR Table 116.A. The Coast Guard designates hazardous 
materials that are transported as bulk liquids by water in Sec.  153.40.

    High viscosity NLS includes high viscosity Category B NLS and high 
viscosity Category C NLS.
    High viscosity Category B NLS means any Category B NLS having a 
viscosity of at least 25 mPa.s at 20 [deg]C and at least 25 mPa.s at the 
time it is unloaded.
    High viscosity Category C NLS means any Category C NLS having a 
viscosity of at least 60 mPa.s at 20 [deg]C and at least 60 mPa.s at the 
time it is unloaded.
    IMO means the International Maritime Organization (IMO, formerly 
Inter-Governmental Maritime Consultative Organization or IMCO).
    IMO Bulk Chemical Code includes the IMO International Code for the 
Construction and Equipment of Ships Carrying Dangerous Chemicals in 
Bulk, Resolution MEPC 19(22), 1985 and the IMO Code for the Construction 
and Equipment of Ships Carrying Dangerous Chemicals in Bulk, Resolution 
MEPC 20(22), 1985.
    IMO Certificate includes a Certificate of Fitness for the Carriage 
of Dangerous Chemicals in Bulk issued under the IMO Code for the 
Construction and Equipment of Ships Carrying Dangerous Chemicals in 
Bulk, Resolution MEPC 20(22), 1985 and an International Certificate of 
Fitness for the Carriage of Dangerous Chemicals in Bulk issued under the 
IMO International Code for the Construction and Equipment of Ships 
Carrying Dangerous Chemicals in Bulk, Resolution MEPC 19(22), 1985.
    Independent, as applied to a cargo piping, venting, heating or 
cooling system means that the system is connected to no other system, 
and has no means available for connection to another system.
    Independent tank means a cargo tank that is permanently affixed to 
the vessel, that is self-supporting, that incorporates no part of the 
vessel's hull and that is not essential to the integrity of the hull.
    Intank cargo pump means a pump:
    (1) Located within the cargo tank it serves; and
    (2) Whose piping passes through only the top of the cargo tank.
    Integral tank means a cargo tank that also is part of or is formed 
in part by the vessel's hull structure so that the tank and the hull may 
be stressed by the same loads.
    IOPP Certificate means an International Oil Pollution Prevention 
Certificate required under 33 CFR 151.19.

[[Page 220]]

    L means the length of the vessel and is defined in Sec.  42.13-15(a) 
of this chapter.
    Liquid means each substance having a vapor pressure of 172 kPa or 
less at 37.8 [deg]C.
    Marine Inspector is defined in Sec.  30.10-43 of this chapter.
    MARPOL 73/78 means the International Convention for Prevention of 
Pollution from Ships, 1973 (done at London, November 2, 1973), modified 
by the Protocol of 1978 relating to the International Convention for 
Prevention of Pollution from Ships, 1973 (done at London, on February 
17, 1978).
    Master means the person-in-charge of a self-propelled or non-self-
propelled ship.
    Mixture means a mixture containing only the substances described in 
conjunction with the term.
    Nearest land has the same meaning as in 33 CFR 151.05(h).
    Noxious liquid substance (NLS) means--
    (1) Each substance listed in 33 CFR 151.47 or 33 CFR 151.49;
    (2) Each substance having an ``A,'' ``B,'' ``C,'' or ``D'' beside 
its name in the column headed ``Pollution Category'' in Table 1; and
    (3) Each substance that is identified as an NLS in a written 
permission issued under Sec.  153.900(c).
    NLS Certificate means an International Pollution Prevention 
Certificate for the Carriage of Noxious Liquid Substances in Bulk issued 
under Annex II of MARPOL 73/78.
    Oceangoing ship has the same meaning as in 33 CFR 151.05(j).
    Officer in Charge, Marine Inspection, is defined in Sec.  1.05(b) of 
this chapter.
    Open gauging means an arrangement for gauging the amount of cargo in 
a tank through a large opening, such as a tank hatch or ullage opening.
    Open venting system means a venting system that always allows vapor 
to flow freely to and from the tank.
    Phosphoric acid means phosphoric acid, superphosphoric acid, and 
aqueous solutions of phosphoric acid.
    Pressure-vacuum (PV) valve means a valve that is normally closed and 
which opens under a preset positive pressure or a vacuum.
    Prewash means a tank washing operation that meets the procedure in 
Sec.  153.1120.
    Pumproom means any enclosed space containing a pump that is part of 
a cargo containment system.
    Reception facility means anything capable of receiving NLS residues 
in a country whose Administration is not signatory to MARPOL 73/78 and 
each adequate reception facility.
    Refrigerated tank means a cargo tank that is equipped to carry a 
cargo that must be cooled in order to keep the cargo's vapor pressure 
from exceeding the tank's pressure-vacuum or safety relief valve setting 
under ambient conditions of 32 [deg]C (approx. 90 [deg]F) still water 
and 46 [deg]C (approx. 115 [deg]F) still air.
    Relief valve setting means the inlet line pressure at which a vent 
system's pressure-vacuum or safety relief valve fully opens.
    Residues and mixtures containing NLSs (NLS residue) means--
    (1) Any Category A, B, C, or D NLS cargo retained on the ship 
because it fails to meet consignee specifications;
    (2) Any part of a Category A, B, C, or D NLS cargo remaining on the 
ship after NLS is discharged to the consignee, including but not limited 
to puddles on the tank bottom and in sumps, clingage in the tanks, and 
substance remaining in the pipes; or
    (3) Any material contaminated with a Category A, B, C, or D NLS 
cargo, including but not limited to bilge slops, ballast, hose drip pan 
contents, and tank wash water.
    Restricted gauging system means a method of gauging the amount of 
cargo in a tank through an opening of limited size that restricts or 
prevents the release of cargo vapors from the tank vapor space.
    Safety relief (SR) valve means a normally closed valve that opens 
under a preset positive pressure.
    Separate and separated, as applied to a cargo piping, venting, 
heating or cooling system, means either an independent system or one 
that may be disconnected from all other systems by:
    (a) Removing spool pieces or valves and blanking the open pipe ends; 
or
    (b) Blocking each system interconnection with two blind flanges in

[[Page 221]]

series and providing a means of detecting leakage into the pipe section 
between the flanges.
    Service spaces means spaces outside the cargo area used for galleys, 
pantries containing cooking appliances, lockers, store rooms, workshops 
other than those forming part of machinery spaces, and trunks to such 
spaces.
    Ship means a vessel of any type whatsoever, including hydrofoils, 
air-cushion vehicles, submersibles, floating craft whether self-
propelled or not, and fixed or floating platforms.
    Slop tanks include slop tanks and cargo tanks used as slop tanks.
    Solidifying NLS means a Category A, B, or C NLS that has a melting 
point--
    (1) Greater than 0 [deg]C but less than 15 [deg]C and a temperature, 
measured under the procedure in Sec.  153.908(d), that is less than 5 
[deg]C above its melting point at the time it is unloaded; or
    (2) 15 [deg]C or greater and has a temperature, measured under the 
procedure in Sec.  153.908(d), that is less than 10 [deg]C above its 
melting point at the time it is unloaded.
    Solution means a water solution.
    Special area means the Baltic Sea Area as defined in 33 CFR 
151.13(a)(2) and the Black Sea Area as defined in 33 CFR 151.13(a)(3).
    SR venting system means a venting system in which an SR valve 
controls vapor flow from the cargo tank.
    Tankship has the same meaning as ``ship''.
    Venting system means a permanent piping arrangement leading from a 
cargo tank and used to control the flow of vapor to and from the tank.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977]

    Editorial Note: For Federal Register citations affecting Sec.  
153.2, see the List of CFR Sections Affected, which appears in the 
Finding Aids section of the printed volume and at www.govinfo.gov.



Sec.  153.3  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 50381, Dec. 6, 1989]



Sec.  153.4  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 Coast Guard Headquarters. 
Contact Commandant (CG-ENG), Attn: Office of Design and Engineering 
Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue 
SE., Washington, DC 20593-7509; or contact the National Archives and 
Records Administration (NARA). For information on the availability of 
this material at NARA, call 202-741-6030, or go to: http://
www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html. All material is available from the sources indicated 
in paragraph (b) of this section.
    (b) American National Standards Institute (ANSI), 25 West 43rd 
Street, 4th Floor, New York, NY 10036, http://www.ansi.org.
    (1) ANSI B16.5, Pipe Flanges and Flanged Fittings, 1988, 
incorporation by reference approved for Sec.  153.940.
    (2) ANSI B16.24, Bronze Pipe Flanges and Flanged Fittings, 1979, 
incorporation by reference approved for Sec.  153.940.
    (3) ANSI B16.31, Non-Ferrous Flanges, 1971, incorporation by 
reference approved for Sec.  153.940.
    (c) American Society for Testing and Materials (ASTM), 100 Barr 
Harbor Drive, West Conshohocken, PA 19428-2959, 877-909-2786, http://
www.astm.org.
    (1) ASTM F 1122-87 (1992), Standard Specification for Quick 
Disconnect Couplings, incorporation by reference approved for Sec.  
153.940.
    (2) ASTM F1271-90 (Reapproved 2012), Standard Specification for 
Spill Valves

[[Page 222]]

for Use in Marine Tank Liquid Overpressure Protections Applications 
(approved May 1, 2012), incorporation by reference approved for Sec.  
153.365.

[CGD 88-032, 56 FR 35826, July 29, 1991, as amended by CGD 96-041, 61 FR 
50732, Sept. 27, 1996; CGD 97-057, 62 FR 51048, Sept. 30, 1997; USCG-
1999-5151, 64 FR 67183, Dec. 1, 1999; 69 FR 18803, Apr. 9, 2004; USCG-
2012-0832, 77 FR 59784, Oct. 1, 2012; USCG-2012-0866, 78 FR 13251, Feb. 
27, 2013; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]



Sec.  153.7  Ships built before December 27, 1977 and
non-self-propelled ships built before July 1, 1983: Application.

    (a) Definitions. (1) Permit means a Certificate of Inspection, 
Letter of Compliance, or Certificate of Compliance.
    (2) Existing tankship means a tankship for which a contract was let 
on or before December 27, 1977.
    (3) Letter of Compliance in this section means a letter issued by 
the Coast Guard before 27 December 1977 which permitted a foreign flag 
tankship to carry a bulk cargo regulated under this part.
    (b) Endorsements for existing tankships. (1) The Coast Guard 
endorses the permit of an existing tankship to carry a cargo listed in 
Table 1 if:
    (i) The tankship held a permit on December 27, 1977, endorsed for 
the cargo in question;
    (ii) The tankship meets the construction standards under which the 
Coast Guard issued the permit; and
    (iii) The tankship meets the standards in paragraph (c) of this 
section.
    (2) The Coast Guard endorses the permit of an existing tankship to 
carry a cargo listed in Table 1 if:
    (i) The tankship held a permit on December 27, 1977;
    (ii) The Coast Guard did not require the permit to be endorsed with 
the name of the cargo at any time before December 27, 1977;
    (iii) The tankship meets the construction standards under which the 
Coast Guard issued the permit;
    (iv) The tankship carried the cargo in question; and
    (v) The tankship meets the standards in paragraph (c) of this 
section.
    (3) The Coast Guard endorses the permit of an existing tankship to 
carry a cargo listed in Table 1 if:
    (i) The tankship held a permit on December 27, 1977 endorsed to 
carry class B or C poisons under 46 CFR part 39;
    (ii) The cargo in question is a class B or C poison;
    (iii) The tankship meets the construction standards in 46 CFR part 
39; and
    (iv) The tankship meets the standards in paragraph (c) of this 
section.
    (4) The Commandant (CG-ENG) considers on a case by case basis 
endorsing the permit of an existing tankship to carry a cargo listed in 
Table 1 if:
    (i) The tankship does not come within the categories described in 
paragraphs (b) (1) through (3) of this section;
    (ii) The tankship meets paragraph (c) of this section; and
    (iii) The tankship meets any additional requirements the Commandant 
(CG-ENG) may prescribe.
    (c) An existing tankship must meet all the requirements of this part 
except as provided in paragraphs (c) (3), (4), (5) and (6) of this 
section.
    (1)-(2) [Reserved]
    (3) The Commandant (CG-ENG) considers on a case by case basis 
endorsing as a type II containment system one that fails to meet 
Sec. Sec.  153.231(b), 153.234, 172.130 and 172.133 of this chapter if 
the tankship and containment system meet the following minimum 
conditions:
    (i) The tankship has a loadline certificate.
    (ii) The cargo tank is not part of the tankship's shell plating.
    (iii) The distance between the bottom plating of the cargo tank and 
the bottom shell plating of the tankship is at least 76 cm measured 
parallel to the vertical axis of the tankship.
    (4) The Commandant (CG-ENG) considers on a case by case basis 
endorsing a containment system as a type II containment system if:
    (i) The containment system is modified to meet Sec.  153.231(b) by 
adding double bottoms or wing tanks; and
    (ii) The tankship can survive the damage described in Sec. Sec.  
172.135 and 172.150 of this chapter to those parts of the tankship other 
than machinery spaces.
    (5) The Commandant (CG-ENG) considers on a case by case basis 
endorsing

[[Page 223]]

as a type III containment system one that does not meet Sec. Sec.  
153.234, 172.130 and 172.133 of this chapter if the tankship has a load 
line certificate.
    (6) The Commandant (CG-ENG) considers on a case by case basis 
endorsing the tankship to carry cargoes listed in Table 1 of this part 
if the tankship does not meet Sec. Sec.  153.217, 153.219 and 153.254.
    (d) Except as required by this paragraph, subpart B of this part 
does not apply to a non-self-propelled ship that carries an NLS cargo 
under this part if--
    (1) The ship was built before July 1, 1983;
    (2) The ship carries no NLS cargo or NLS residue at any time it is 
in waters of another Administration signatory to MARPOL 73/78;
    (3) The NLS does not require a type I containment system;
    (4) The ship meets all requirements in parts 30 through 34 and part 
151 of this chapter that apply to the cargo;
    (5) The ship meets the provisions in Sec.  153.216 and Sec. Sec.  
153.470 through 153.491 applying to the NLS category of that cargo;
    (6) When the ``Special Requirements'' column of Table 1 contains an 
entry for Sec.  153.408 or Sec.  153.409 beside the cargo name, the ship 
meets the section, except the system prescribed by the section need be 
capable of operation only during loading;
    (7) [Reserved]
    (8) No part of the ship's hull plating is a component of a cargo 
tank if the cargo tank is endorsed to carry a cargo having a type II 
containment system in Table 1.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21204, May 17, 1982; CGD 82-063b, 48 FR 4781, Feb. 3, 1983; CGD 79-023, 
48 FR 51009, Nov. 4, 1983; CGD 81-052, 50 FR 8733, Mar. 5, 1985; CGD 81-
101, 52 FR 7779, Mar. 12, 1987; CGD 81-101, 53 FR 28974, Aug. 1, 1988 
and 54 FR 12629, Mar. 28, 1989; CGD 95-072, 60 FR 54106, Oct. 19, 1995]



Sec.  153.8  Procedures for requesting an endorsed Certificate
of Inspection.

    (a) When applying for the endorsed Certificate of Inspection that 
Sec.  153.900 requires for a ship to carry a cargo listed in Table 1, 
the applicant must proceed as follows:
    (1) Send a letter to one of the Coast Guard offices listed in Sec.  
91.55-15 of this chapter that includes--
    (i) A request for the endorsed Certificate of Inspection;
    (ii) The name of the ship; and
    (iii) A list of the cargoes from Table 1 the applicant wishes the 
endorsement to allow.
    (2) Supply to the Coast Guard when requested--
    (i) Hull type calculations;
    (ii) The plans and information listed in Sec. Sec.  54.01-18, 56.01-
10, 91.55-5 (a), (b), (d), (g), and (h), and 110.25-1 of this chapter;
    (iii) A copy of the Procedures and Arrangements Manual required by 
Sec.  153.490; and
    (iv) Any other ship information, including plans, design 
calculations, test results, certificates, and manufacturer's data, that 
the Coast Guard needs to determine if the ship meets this part.
    (b) The Coast Guard notifies the applicant in writing--
    (1) Whether any further information is necessary to evaluate the 
request for the endorsed Certificate of Inspection; and
    (2) Of the outcome of the request for the endorsed Certificate of 
Inspection.
    (c) The Coast Guard returns the Procedures and Arrangements Manual 
stamped ``Approved'' or indicating what corrections are necessary.

    Note: The procedures for requesting an IOPP Certificate are found in 
33 CFR Part 151.

[CGD 81-101, 52 FR 7779, Mar. 12, 1987]



Sec.  153.9  Foreign flag vessel endorsement application.

    (a) Application for a vessel whose flag administration is signatory 
to MARPOL 73/78 and issues IMO Certificates. A person who desires a 
Certificate of Compliance endorsed to carry a cargo in table 1 of this 
part, as described in Sec.  153.900 of this part, must request the 
endorsement from the cognizant Officer in Charge, Marine Inspection and 
have aboard the vessel copies of IMO Certificates issued by the vessel's 
administration and--
    (1) An additional classification society statement that the vessel 
complies with Sec.  153.530 (b), (d), and (p)(1) if a person desires a 
Certificate of Compliance

[[Page 224]]

endorsed with the name of an alkylene oxide; and
    (2) An additional classification society statement that the vessel 
complies with Sec. Sec.  153.370, 153.371, and 153.438 if a person 
desires a Certificate of Compliance endorsed with the name of a cargo 
whose vapor pressure exceeds 100 kPa absolute at 37.8 [deg]C 
(approximately 14.7 psia at 100 [deg]F).
    (b) Application for a vessel whose flag administration does not 
issue IMO Certificates. A person who desires a Certificate of Compliance 
endorsed with the name of a cargo in Table 1 of this part, as described 
in Sec.  153.900, must submit an application, in a written or electronic 
format, to Commanding Officer (MSC), Attn: Marine Safety Center, U.S. 
Coast Guard Stop 7430, 2703 Martin Luther King Jr. Avenue SE., 
Washington, DC 20593-7430, that includes the following information:
    (1) A copy of the vessel's Cargo Ship Safety Construction 
Certificate and Cargo Ship Safety Equipment Certificate issued under the 
International Convention for Safety of Life at Sea, 1974.
    (2) A list of those cargoes for which the Letter of Compliance is to 
be endorsed.
    (3) The specific tanks that are to be endorsed for each cargo.
    (4) The names of the U.S. ports in which the person anticipates 
operating the vessel.
    (5) The name of the vessel's flag administration.
    (6) The name of the society that classes the vessel.
    (7) A brief description of the vessel's cargo containment systems.
    (8) Hull type calculations.
    (9) The plans and information listed in Sec. Sec.  54.01-18, 56.01-
10, 91.55-5 (a), (b), (d), (g), and (h), and 111.05-5(d) of this 
chapter.
    (c) Conditions applying to all Certificate of Compliance 
applications. (1) If requested by the Commanding Officer, U.S. Coast 
Guard Marine Safety Center, a person desiring a Certificate of 
Compliance for a vessel must furnish any other vessel information such 
as plans, design calculations, test results, certificates, and 
manufacturer's data, that the Coast Guard needs to determine that the 
vessel meets the standards of this part.
    (2) Correspondence with the Coast Guard and vessel information 
submitted under this part must be in English except IMO Certificates 
which may be in French.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977]

    Editorial Note: For Federal Register citations affecting Sec.  
153.9, see the List of CFR Sections Affected, which appears in the 
Finding Aids section of the printed volume and at www.govinfo.gov.



Sec.  153.10  Procedures for requesting alternatives and waivers;
termination of waivers.

    (a) The Coast Guard considers allowing the use of an alternative in 
place of a requirement in this part if--
    (1) The person wishing to use the alternative sends a written 
application to the Commandant (CG-ENG) explaining--
    (i) The requirement in this part that would not be met and the 
reason why;
    (ii) The alternative the person proposes to be substituted; and
    (iii) How the alternative would ensure a level of safety and 
pollution protection at least equal to that of the requirement for which 
the alternative would substitute;
    (2) The alternative does not substitute an operational standard for 
a design or equipment standard; and
    (3) The Commandant (CG-ENG) determines that the alternative provides 
a level of protection for purposes of safety and pollution at least 
equal to the requirement in this part.
    (b) The Coast Guard considers granting a waiver of a requirement for 
which this part allows a waiver if the person wishing the waiver sends a 
written application to the Commandant (CG-ENG) that includes--
    (1) A citation of the regulation that allows the waiver; and
    (2) Any information and pledges that the regulation requires to be 
submitted with the application for the waiver.
    (c) The Commandant notifies the applicant in writing--
    (1) Whether any further information is necessary to evaluate the 
request for an alternative or waiver; and
    (2) Of the outcome of the request for an alternative or waiver.

[[Page 225]]

    (d) A waiver issued under this part terminates if any--
    (1) Information required to be supplied with the application for the 
waiver changes;
    (2) Pledges required to be supplied with the application for the 
waiver are repudiated;
    (3) Restrictions or procedures applying to operations under the 
waiver are violated; or
    (4) Requirements in the section of this part authorizing the waiver 
are violated.

[CGD 81-101, 52 FR 7780, Mar. 12, 1987]



Sec.  153.12  IMO Certificates for United States Ships.

    Either a classification society authorized under 46 CFR part 8, or 
the Officer in Charge, Marine Inspection, issues a United States ship an 
IMO Certificate endorsed to allow the carriage of a hazardous material 
or NLS cargo in table 1 of this part if the following requirements are 
met:
    (a) The ship's owner must make a request to the OCMI for the IMO 
Certificate.
    (b) The ship must meet this part.
    (c) Self-propelled ships contracted for after November 1, 1973 but 
built before December 28, 1977 must meet requirements in this part that 
apply to a self-propelled ship built on December 28, 1977.
    (d) Non-self-propelled ships contracted for after November 1, 1973 
but built before July 1, 1983 must meet the requirements in this part 
applying to non-self-propelled ships built on July 1, 1983.

[CGD 81-101, 52 FR 7780, Mar. 12, 1987, as amended by CGD 95-010, 62 FR 
67537, Dec. 24, 1997]



Sec.  153.15  Conditions under which the Coast Guard issues a 
Certificate of Inspection or Certificate of Compliance.

    (a) The Coast Guard issues the endorsed Certificate of Inspection 
required under Sec.  153.900 for a United States ship to carry a 
hazardous material or NLS listed in Table 1 if--
    (1) The person wishing the Certificate of Inspection applies 
following the procedures under Sec.  153.8; and
    (2) The ship meets the design and equipment requirements of this 
part and--
    (i) Subchapter D of this chapter if the hazardous material or NLS is 
flammable or combustible; or
    (ii) Either Subchapter D or I of this chapter, at the option of the 
ship owner, if the hazardous material or NLS is non-flammable or non-
combustible.
    (b) The Coast Guard issues the endorsed Certificate of Compliance 
required under Sec.  153.900 for a foreign ship to carry a hazardous 
material or NLS listed in Table 1 if--
    (1) The person wishing the Certificate of Compliance follows the 
procedures under Sec.  153.9;
    (2) The ship has an IMO Certificate issued by its Administration and 
endorsed with the name of the hazardous material or NLS if the ship's 
Administration is signatory to MARPOL 73/78;
    (3) The ship meets the requirements of this part applying to United 
States ships and Sec.  30.01-5(e) of this chapter if the ship's 
Administration is not signatory to MARPOL 73/78; and
    (4) The ship meets any additional design and equipment requirements 
specified by the Commandant (CG-ENG).

[CGD 81-101, 52 FR 7780, Mar. 12, 1987]



Sec.  153.16  Requirements for foreign flag vessel permits.

    To have its Certificate of Compliance endorsed to carry a cargo 
listed in Table 1, a foreign flag vessel must:
    (a) Have an IMO Certificate, if the flag administration issues IMO 
Certificates, endorsed with the name of the cargo and meet any specific 
requirements in this subpart that the Commandant (CG-ENG) may prescribe; 
or
    (b) Meet the requirements of this subpart and Sec.  30.01-5(e) of 
this chapter.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983; CGD 81-052, 50 FR 8733, Mar. 5, 1985; CGD 81-101, 
52 FR 7780, Mar. 12, 1987; CGD 95-027, 61 FR 26008, May 23, 1996]



Sec.  153.30  Special area endorsement.

    The Coast Guard endorses the Certificate of Inspection of a United 
States ship allowing it to operate in special areas if the ship owner--

[[Page 226]]

    (a) Requests the endorsement following the procedures in Sec.  
153.8;
    (b) Shows that the ship meets the design and equipment requirements 
applying to ships operating in special areas contained in Regulations 5, 
5A, and 8 of Annex II and the Standards for Procedures and Arrangements.

[CGD 81-101, 52 FR 7780, Mar. 12, 1987]



Sec.  153.40  Determination of materials that are hazardous.

    Under the authority delegated by the Secretary of Transportation in 
49 CFR 1.46(t) to carry out the functions under 49 U.S.C. 1803, the 
Coast Guard has found the following materials to be hazardous when 
transported in bulk:
    (a) Materials listed in Table 30.25-1 of this chapter.
    (b) Materials listed in Table 151.05.
    (c) Materials listed in Table 1. \1\
---------------------------------------------------------------------------

    \1\ Those hazardous material cargoes designated Category A, B, C, or 
D in Table 1 are also Noxious Liquid Substances under Annex II and the 
Act to Prevent Pollution from Ships, 33 U.S.C. 1901 et seq.
---------------------------------------------------------------------------

    (d) Materials listed in Table 4 of Part 154.
    (e) Materials that are NLSs under MARPOL Annex II.
    (f) Liquids, liquefied gases, and compressed gases, that are--
    (1) Listed in 49 CFR 172.101;
    (2) Listed in 49 CFR 172.102; or
    (3) Listed or within any of the definitions in subparts C through O 
of 49 CFR part 173.
    (g) Those liquid, liquefied gas, and compressed gas materials 
designated as hazardous in the permissions granted under Sec.  
153.900(c). \2\
---------------------------------------------------------------------------

    \2\ The Coast Guard continues to propose in the Federal Register any 
addition of these designated hazardous materials to one of the tables 
referred to in paragraphs (a) through (d).

[CGD 81-101, 52 FR 7780, Mar. 12, 1987]



                     Subpart B_Design and Equipment

                       General Vessel Requirements



Sec.  153.190  Stability requirements.

    Each vessel must meet the applicable requirements in Subchapter S of 
this chapter.

[CGD 79-023, 48 FR 51009, Nov. 4, 1983. Redesignated by CGD 81-101, 52 
FR 7780, Mar. 12, 1987]



Sec.  153.201  Openings to accommodation, service or control spaces.

    (a) Except as allowed in paragraph (b) of this section, entrances, 
ventilation intakes and exhausts, and other openings to accommodation, 
service, or control spaces must be located aft of the house bulkhead 
facing the cargo area a distance at least equal to the following:
    (1) 3 m (approx. 10 ft) if the vessel length is less than 75 meters 
(approx. 246 ft).
    (2) L/25 if the vessel length is between 75 and 125 meters (approx. 
246 ft and 410 ft).
    (3) 5 m (approx. 16.5 ft) if the vessel length is more than 125 
meters (approx. 410 ft).
    (b) Fixed port lights, wheelhouse doors, and windows need not meet 
the location requirements specified in paragraph (a) of this section if 
they do not leak when tested with a fire hose at 207 kPa gauge (30 
psig).

[CGD 81-078, 50 FR 21173, May 22, 1985]



Sec.  153.208  Ballast equipment.

    (a) Except for the arrangement described in paragraph (b) of this 
section no piping that serves a dedicated ballast tank that is adjacent 
to a cargo tank may enter an engine room or accommodation space.
    (b) Piping used only to fill a dedicated ballast tank adjacent to a 
cargo tank may enter an engine room or accommodation space if the piping 
has a valve or valving arrangement:
    (1) Within the part of the tankship where a containment system may 
be located under Sec.  153.234;
    (2) That allows liquid to flow only towards that ballast tank (such 
as a check valve); and

[[Page 227]]

    (3) That enables a person to shut off the fill line from the 
weatherdeck (such as a stop valve).
    (c) Except as prescribed in paragraph (d) of this section, pumps, 
piping, vent lines, overflow tubes and sounding tubes serving dedicated 
ballast tanks must not be located within a cargo containment system.
    (d) Each vent line, overflow tube and sounding tube that serves a 
dedicated ballast tank and that is located within a cargo containment 
system must meet Sec.  32.60-10(e)(2) of this chapter.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21207, May 17, 1982]



Sec.  153.209  Bilge pumping systems.

    Bilge pumping systems for cargo pumprooms, slop tanks, and void 
spaces separated from cargo tanks by only a single bulkhead must be 
entirely within the locations allowed containment systems in Sec.  
153.234.



Sec.  153.214  Personnel emergency and safety equipment.

    Each self-propelled ship must have the following:
    (a) Two stretchers or wire baskets complete with equipment for 
lifting an injured person from a pumproom or a cargo tank.
    (b) In addition to any similar equipment required by Subchapter D of 
this chapter, three each of the following:
    (1) A 30 minute self-contained breathing apparatus of the pressure 
demand type, approved by the Mining Safety and Health Administration 
(formerly the Mining Enforcement and Safety Administration) and the 
National Institute for Occupational Safety and Health, or the tankship's 
flag administration with five refill tanks or cartridges of 30 minutes 
capacity each.
    (2) A set of overalls or large apron, boots, long sleeved gloves, 
and goggles, each made of materials resistant to the cargoes in Table 1 
that are endorsed on the Certificate of Inspection or Certificate of 
Compliance.
    (3) A steel-cored lifeline with harness.
    (4) An explosion-proof lamp.
    (c) First aid equipment.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 77-222, 43 FR 
57256, Dec. 7, 1978; CGD 78-128, 47 FR 21207, May 17, 1982; CGD 81-052, 
50 FR 8733, Mar. 5, 1985; CGD 81-101, 52 FR 7781, Mar. 12, 1987]



Sec.  153.215  Safety equipment lockers.

    Each self-propelled ship must have the following:
    (a) Each tankship must have at least two safety equipment lockers.
    (b) One safety equipment locker must be adjacent to the emergency 
shutdown station required by Sec.  153.296(b). This locker must contain 
one set of the equipment required by Sec.  153.214(a) and two sets of 
that required by Sec.  153.214(b).
    (c) The second safety equipment locker must be adjacent to the 
second emergency shutdown station required by Sec.  153.296. This locker 
must contain the remaining equipment required by Sec.  153.214 (a) and 
(b).
    (d) Each safety equipment locker must be marked as described in 
Sec.  153.955 (c), (d), and (e) with the legend ``SAFETY EQUIPMENT.''

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21207, May 17, 1982; CGD 81-101, 52 FR 7781, Mar. 12, 1987]



Sec.  153.216  Shower and eyewash fountains.

    (a) Each non-self-propelled ship must have a fixed or portable 
shower and eyewash fountain that operates during cargo transfer and 
meets paragraph (c) of this section.
    (b) Each self-propelled ship must have a shower and eyewash fountain 
that operates at all times and meets paragraph (c) of this section.
    (c) The shower and eyewash fountains required by paragraphs (a) and 
(b) of this section must--
    (1) Operate in any ambient temperature;
    (2) Dispense water at a temperature between 0 [deg]C and 40 [deg]C 
(approx. 32 [deg]F and 104 [deg]F);
    (3) Be located on the weatherdeck; and
    (4) Be marked ``EMERGENCY SHOWER'' as described in Sec.  153.955 
(c), (d), and (e), so that the marking is visible from work areas in the 
part of the deck

[[Page 228]]

where the cargo containment systems are located.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987]



Sec.  153.217  Access to enclosed spaces and dedicated ballast tanks.

    An access opening to an enclosed space or a dedicated ballast tank 
must meet the requirements for a cargo tank access in Sec.  153.254 (b), 
(c), and (d) if:
    (a) The enclosed space or dedicated ballast tank is located within 
the cargo area of the vessel; or
    (b) A part of a cargo containment system lies within the enclosed 
space or dedicated ballast tank.

[CGD 78-128, 47 FR 21207, May 17, 1982]



Sec.  153.219  Access to double bottom tanks serving as dedicated
ballast tanks.

    (a) Except as prescribed in paragraph (b) of this section, access 
openings to double bottom tanks serving as dedicated ballast tanks must 
not be located within a cargo containment system.
    (b) Each access opening to a double bottom tank that is a dedicated 
ballast tank and that is located within a cargo containment system must 
be:
    (1) Enclosed in an access trunk extending to the weatherdeck;
    (2) Separated from the cargo containment system by two manhole 
coverings; or
    (3) Approved by the Commandant (CG-ENG).

[CGD 78-128, 47 FR 21207, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                        Cargo Containment Systems



Sec.  153.230  Type I system.

    A type I containment system must meet the following requirements:
    (a) The vessel must meet the requirements in subpart F of part 172 
of this chapter for a type I hull.
    (b) Except as described in Sec.  153.235:
    (1) It may be no closer to the tankship's shell than 76 cm (approx. 
29.9 in.); and
    (2) It may not be located in any part of the tankship subject to the 
damage described in Table 172.135 of this chapter for:
    (i) Collision Penetration, Transverse extent; and
    (ii) Grounding Penetration, Vertical extents from the baseline 
upward.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 79-023, 48 FR 
51009, Nov. 4, 1983]



Sec.  153.231  Type II system.

    A type II containment system must meet the following requirements:
    (a) The vessel must meet the requirements in subpart F of part 172 
of this chapter for a type I or II hull.
    (b) Except as allowed in Sec. Sec.  153.7 and 153.235--
    (1) It may be no closer to the tankship's shell than 76 cm (approx. 
29.9 in.); and
    (2) It may not be located in any part of the tankship subject to the 
damage described in Table 172.135 of this chapter for Grounding 
Penetration, Vertical extent from the baseline upward.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 79-023, 48 FR 
51009, Nov. 4, 1983; CGD 81-101, 52 FR 7781, Mar. 12, 1987]



Sec.  153.232  Type III system.

    A type III containment system must be in either a type I, II, or III 
hull. The requirements for type I, II, and III hulls are in subpart F of 
part 172 of this chapter.

[CGD 79-023, 48 FR 51009, Nov. 4, 1983]



Sec.  153.233  Separation of tanks from machinery, service and
other spaces.

    (a) To prevent leakage through a single weld failure, the following 
spaces must be separated from a cargo by two walls, two bulkheads, or a 
bulkhead and a deck not meeting in a cruciform joint:
    (1) Machinery spaces.
    (2) Service spaces.
    (3) Accommodation spaces.
    (4) Spaces for storing potable domestic, or feed water.
    (5) Spaces for storing edibles.
    (b) Some examples of arrangements that may separate cargo from the 
spaces listed in paragraph (a) of this section are the following:
    (1) Dedicated ballast tanks.
    (2) Cargo pumprooms.

[[Page 229]]

    (3) Ballast pumprooms.
    (4) Tanks not carrying a cargo listed in this part. \3\
---------------------------------------------------------------------------

    \3\ See also Sec. Sec.  32.56-5 and 32.60-10 of this chapter for 
limitations on the stowage of combustible liquids adjacent to ignition 
sources.
---------------------------------------------------------------------------

    (5) A cofferdam aft of the cargo containment systems and whose 
forward bulkhead is forward of any joint common to an accommodations 
space and the deck.
    (6) Double walled piping or a piping tunnel.



Sec.  153.234  Fore and aft location.

    Except as allowed in Sec.  153.7, each ship must meet the following:
    (a) Each cargo containment system and any compartments within which 
a containment system is located must be forward of a tankship's 
accommodation spaces.
    (b) Except as described in Sec.  153.235, each cargo containment 
system must be located at least 0.05L aft of the forward perpendicular, 
but in no case forward of a collision bulkhead.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 81-101, 52 FR 
7781, Mar. 12, 1987]



Sec.  153.235  Exceptions to cargo piping location restrictions.

    Cargo piping must not be located in those areas from which a 
containment system is excluded by Sec. Sec.  153.230(b), 153.231(b), and 
153.234(b) unless the cargo piping:
    (a) Drains back to the cargo tank under any heel or trim resulting 
from the damage specified in Sec.  172.135 of this chapter; and
    (b) Enters the cargo tank above the liquid level for a full tank in 
any condition of heel or trim resulting from the damage specified in 
Sec.  172.135 of this chapter.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 79-023, 48 FR 
51009, Nov. 4, 1983]



Sec.  153.236  Prohibited materials.

    When one of the following paragraphs of this section is referenced 
in Table 1, the materials listed in that paragraph may not be used in 
components that contact the cargo liquid or vapor:
    (a) Aluminum or aluminum alloys.
    (b) Copper or copper alloys.
    (c) Zinc, galvanized steel or alloys having more than 10 percent 
zinc by weight.
    (d) Magnesium.
    (e) Lead.
    (f) Silver or silver alloys.
    (g) Mercury.



Sec.  153.238  Required materials.

    When one of the following paragraphs of this section is referenced 
in Table 1, only those materials listed in that paragraph may be used in 
components that contact the cargo liquid or vapor:
    (a) Aluminum, stainless steel, or steel covered with a protective 
lining or coating.
    (b) With cargo concentrations of 98 percent or greater, aluminum or 
stainless steel.
    (c) With cargo concentrations of less than 98 percent, 304L or 316 
stainless steel.
    (d) Solid austenitic stainless steel.
    (e) Stainless steel or steel covered with a suitable protective 
lining or coating. (See Sec.  153.266.)

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 88-100, 54 FR 
40041, Sept. 29, 1989]



Sec.  153.239  Use of cast iron.

    (a) Cast iron used in a cargo containment system must meet the 
requirements of Sec.  56.60-10(b) of this chapter.
    (b) For purposes of this section, the term ``lethal products'' in 
Sec.  56.60-10(b) means those cargoes that Table 1 references to Sec.  
153.525 or Sec.  153.527.

[CGD 78-128, 47 FR 21207, May 17, 1982]



Sec.  153.240  Insulation.

    Cargo containment system insulation made necessary by the 
requirements of this part must meet the requirements in Sec.  38.05-20 
of this chapter. However, the vapor barrier required by Sec.  38.05-
20(b) is unnecessary if the insulation is:
    (a) Protected from the weather, and attached to a containment system 
maintained at a temperature in excess of 46 [deg]C (approx. 115 [deg]F); 
or

[[Page 230]]

    (b) In an atmosphere whose dew point is less than the temperature of 
any surface in contact with the insulation.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by USCG-2014-0688, 
79 FR 58284, Sept. 29, 2014]

                               Cargo Tanks



Sec.  153.250  Double-bottom and deep tanks as cargo tanks.

    Except in those cases in which Commandant (CG-ENG) specifically 
approves another arrangement, such as a double-bottom or deep tank as a 
cargo tank, an integral cargo tank or the hold within which an 
independent cargo tank is located must extend to the weatherdeck.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983]



Sec.  153.251  Independent cargo tanks.

    All independent cargo tank must meet Sec.  38.05-10 (a)(1), (b), 
(d), and (e)(1) of this chapter.

[CGD 78-128, 47 FR 21208, May 17, 1982]



Sec.  153.252  Special requirement for an independent cargo tank.

    When Table 1 refers to this section, the cargo tank must be an 
independent tank that meets Sec. Sec.  38.05-2(d) and 38.05-4(g) of this 
chapter. (See also Sec.  153.256(b)).

[CGD 78-128, 47 FR 21208, May 17, 1982]



Sec.  153.254  Cargo tank access.

    (a) A cargo tank must have at least one covered manhole opening into 
the vapor space described in Sec.  153.354.
    (b) An access through a vertical cargo tank surface must be at least 
60 cm by 80 cm (approx. 23.6 x 31.5 in.) and no more than 60 cm above a 
foothold grating, or surface on both sides of the access way.
    (c) An access through a horizontal cargo tank surface must be at 
least 60 cm by 60 cm (approx. 23.6 x 23.6 in.).
    (d) An access trunk must be no less than 76 cm (approx. 29.9 in.) in 
diameter.



Sec.  153.256  Trunks, domes, and openings of cargo tanks.

    (a) The hatch of a cargo tank must:
    (1) Be at the highest point of the tank; and
    (2) Open on or above the weatherdeck.
    (b) To be endorsed to carry a cargo requiring an independent cargo 
tank, a tank must have:
    (1) A trunk or dome at the uppermost part of the tank, extending 
above the weatherdeck;
    (2) Its hatch at the top of the trunk or dome; and
    (3) No openings below the weatherdeck.



Sec.  153.266  Tank linings.

    A tank lining must be:
    (a) At least as elastic as the tank material; and
    (b) Applied or attached to the tank as recommended by the lining 
manufacturer.

               Piping Systems and Cargo Handling Equipment



Sec.  153.280  Piping system design.

    (a) Each cargo piping system must meet the standards of Part 56 and 
Sec. Sec.  38.10-1(b), 38.10-1(e), and 38.10-10(a) of this chapter.
    (b) Piping carrying cargo or cargo residue may not enter any 
machinery space except a cargo pumproom.



Sec.  153.281  Piping to independent tanks.

    Piping for an independent cargo tank must penetrate the tank only 
through that part of the tank or dome extending above the weatherdeck.

[CGD 78-128, 47 FR 21208, May 17, 1982]



Sec.  153.282  Cargo filling lines.

    The discharge point of a cargo tank filling line must be no higher 
above the bottom of the cargo tank or sump than 10 cm (approx. 4 in.) or 
the radius of the filling line, whichever is greater.



Sec.  153.283  Valving for cargo piping.

    (a) Except as described in this section, a cargo line must have a 
deck operable, manual stop valve:
    (1) In each tank which the line serves; and
    (2) At each cargo hose connection point.
    (b) The valve required by paragraph (a)(1) of this section may be in 
a cargo

[[Page 231]]

pumproom at the pumproom bulkhead if the cargo tank the cargo line 
serves is adjacent to the pumproom.
    (c) The valve required by paragraph (a)(1) of this section may be on 
the weatherdeck if:
    (1) The weatherdeck is the top of the tank;
    (2) The line goes through the weatherdeck into the tank; and
    (3) The valve is at the point where the line penetrates the 
weatherdeck.
    (d) The valve required by paragraph (a)(1) of this section may be 
outside the tank if:
    (1) The tank is an independent tank; and
    (2) The valve is at the point where the line penetrates the tank.
    (e) The discharge line of an intank cargo pump need not have the 
valve required by paragraph (a)(1) of this section.
    (f) If the cargo exerts a gravity head pressure on a valve required 
by this section, the valve must be a positive shutoff valve that meets 
Sec.  56.50-60(d) of this chapter.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21208, May 17, 1982]



Sec.  153.284  Characteristics of required quick closing valves.

    A remotely actuated quick closing shutoff valve required by Sec.  
153.530(n) must:
    (a) Be a positive shutoff valve;
    (b) Be of the fail-closed type that closes on loss of power;
    (c) Be capable of local manual closing;
    (d) Close from the time of actuation in 30 seconds or less; and
    (e) Be equipped with a fusible element that melts at less than 104 
[deg]C (approx. 220 [deg]F) and closes the valve.

[CGD 78-128, 47 FR 21208, May 17, 1982; 47 FR 27293, June 24, 1982]



Sec.  153.285  Valving for cargo pump manifolds.

    (a) When cargo lines serving different tanks enter a pumproom and 
connect to the same pump:
    (1) Each cargo line must have a stop valve within the line;
    (2) The valve must be before the cargo line joins the other lines or 
pump; and
    (3) The valve must be within the pumproom.
    (b) The valve in paragraph (a) of this section is required in 
addition to any valve required under Sec.  153.283(b).



Sec.  153.292  Separation of piping systems.

    Cargo piping systems must be arranged so that operations necessary 
to provide separate systems can be accomplished in a cargo handling 
space or on the weatherdeck.

[CGD 78-128, 47 FR 21208, May 17, 1982]



Sec.  153.294  Marking of piping systems.

    (a) Each cargo piping system must be marked with the designation 
number of the cargo tank it serves at each hose connection, valve, and 
blind in the piping system. The markings must be in characters at least 
5 cm (approx. 2 in.) high.
    (b) Every hose connection of a cargo piping system must be marked 
with the cargo piping system's working pressure required by Sec.  38.10-
10(a) of this chapter. \4\
---------------------------------------------------------------------------

    \4\ See Sec.  153.280 of the part.
---------------------------------------------------------------------------



Sec.  153.296  Emergency shutdown stations.

    (a) Each tankship must have at least two emergency shutdown 
stations.
    (b) One emergency shutdown station must be located forward of the 
deckhouse, in the after part of the weatherdeck in which the cargo tanks 
are located.
    (c) A second emergency shutdown station must be located so that one 
of the two stations is accessible from any part of the weatherdeck if a 
break in a cargo piping system or hose causes spraying or leaking.
    (d) Each emergency shutdown station must contain a single remote 
actuator for all quick closing shutoff valves required by this part.
    (e) Each emergency shutdown station must have the controls necessary 
to stop all cargo pumps on the tankship.
    (f) Any remote emergency actuator, such as that for a quick closing 
shut-off valve, a cargo pump, or a water spray system, must be of a type 
that

[[Page 232]]

will not defeat the operation of other remote emergency actuators. The 
emergency action must occur whether one or several actuators are 
operated.
    (g) Each emergency shutdown station must be marked as described in 
Sec.  153.955 (c), (d), and (e) with the legend ``EMERGENCY SHUTDOWN 
STATION'' so that the legend is visible from work areas in the part of 
the deck where the cargo containment systems are located.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21208, May 17, 1982]



Sec.  153.297  Emergency actuators at the point of cargo control.

    (a) The point from which cargo transfer is controlled must have the 
same actuators an emergency shutdown station must have under Sec.  
153.296 and an actuator for any deck water spray systems required by 
this part.
    (b) The point from which cargo transfer is controlled may be one of 
the emergency shutdown stations required under Sec.  153.296 if it meets 
the requirements of that section.

                    Cargo Handling Space Ventilation



Sec.  153.310  Ventilation system type.

    A cargo handling space must have a permanent forced ventilation 
system of the exhaust type.



Sec.  153.312  Ventilation system standards.

    A cargo handling space ventilation system must meet the following:
    (a) A ventilation system exhaust duct must discharge no less than 10 
m (approx. 32.8 ft) from openings into or ventilation intakes for, 
accommodation or service spaces.
    (b) A ventilation system must not recycle vapors from ventilation 
discharges.
    (c) Except for the space served by the ventilation duct, a 
ventilation duct must not pass through a machinery room, an 
accommodation space, or working spaces.
    (d) A ventilation system must be operable from outside the space it 
ventilates.
    (e) A ventilation system must be sized to change the air in the 
ventilated space at least 30 times per hour.
    (f) A ventilation system must not allow air to stagnate in any part 
of a ventilated space.
    (g) A ventilation system must be able to exhaust air from both above 
and below the deck plates of a ventilated space.



Sec.  153.314  Ventilation of spaces not usually occupied.

    (a) Each tankship must have portable ventilation equipment that fits 
the mount required in paragraph (b)(1) of this section.
    (b) Each enclosed space within the cargo area that does not have a 
permanent ventilation system meeting Sec.  153.312 must have:
    (1) A mount for the portable mechanical ventilation equipment 
required by this section; and
    (2) Either permanent ventilation ductwork connected to the mount and 
arranged to supply air to the extremities of the space; or
    (3) An attachment for temporary ductwork at the mount with enough 
ductway in the ventilated space and temporary ductwork stowed aboard the 
vessel to supply air to the extremities of the space.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21208, May 17, 1982]



Sec.  153.316  Special cargo pumproom ventilation rate.

    When Table 1 refers to this section, the cargo pumproom ventilation 
system must change the air in the cargo pumproom 45 times per hour and 
discharge no less than 4 m (approx. 13.1 ft) above the deck.

                             Cargo Pumprooms



Sec.  153.330  Access.

    (a) The access door to a cargo pump-room must open on the 
weatherdeck.
    (b) The access way to a cargo pump-room and its valving must allow 
passage of a man wearing the breathing apparatus required by Sec.  
153.214(b)(1).
    (c) Each ladderway in a cargo pump-room must be free from 
obstructions by piping, framework, or other equipment.
    (d) Cargo pumproom ladders and platforms must have guard railings.

[[Page 233]]

    (e) Each ladder to a cargo pump-room must have an incline from the 
horizontal of less than 60[deg].

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by USCG-2014-0688, 
79 FR 58284, Sept. 29, 2014]



Sec.  153.332  Hoisting arrangement.

    (a) A cargo pumproom located below the weatherdeck must have a 
permanent hoisting arrangement with a lifting capacity of 2500 N 
(approx. 562 lbs), operable from the weatherdeck, for the removal of an 
unconscious person.
    (b) The cargo pumproom must have a 60 cm by 60 cm (approx. 2 ft by 2 
ft) cross-sectional clearance through the hoistway.



Sec.  153.333  Cargo pump discharge pressure gauge.

    Each cargo pump within a pump-room must have a discharge pressure 
gauge outside the pumproom.



Sec.  153.334  Bilge pumping systems.

    (a) A cargo pumproom must have a bilge pumping system.
    (b) The bilge pumping system must have:
    (1) Complete remote operating controls outside the cargo pumproom; 
and
    (2) An alarm that operates when the depth of liquid in the bilges 
exceeds 50 cm (approx. 19.7 in.).



Sec.  153.336  Special cargo pump or pumproom requirements.

    (a) When Table 1 refers to this section:
    (1) The cargo pump must be an intank cargo pump;
    (2) The cargo pumproom must be on or above the weatherdeck; or
    (3) The cargo pumproom must have the specific approval of the 
Commandant (CG-ENG).
    (b) For a cargo pumproom described in paragraph (a)(2) or (a)(3) the 
tankship must:
    (1) Have a low pressure breathing quality air supply system for use 
with the breathing apparatus in the pumproom; or
    (2) Meet any requirements specified by the Commandant (CG-522).
    (c) A low pressure air supply system described in paragraph (b)(1) 
of this section must:
    (1) Run from fixed air bottles to the pumproom;
    (2) Have an air compressor to recharge the fixed air bottles;
    (3) have hose connections in the pumproom suitable for use with the 
breathing apparatus required in Sec.  153.214(b)(1); and
    (4) have the air capacity to enable two men to work in the pumproom 
for at least one hour each without using the cartridges for the 
breathing apparatus required in Sec.  153.214(b)(1).

[CGD 78-128, 47 FR 21208, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4781, Feb. 3, 1983]

                          Cargo Venting Systems



Sec.  153.350  Location of B/3 vent discharges.

    Except as prescribed in Sec.  153.353, a

B/3 venting system must discharge:
    (a) At the highest of the following points:
    (1) 6m (approx. 19.7 ft) above the weatherdeck.
    (2) B/3 above the weatherdeck.
    (3) 6m (approx. 19.7 ft) above a walkway, if the walkway is within a 
6m (approx. 19.7 ft) horizontal radius from the vent discharge.
    (b) At least 15m (approx. 49.2 ft) from air intakes for, or openings 
into, accommodation and service spaces.

[CGD 78-128, 47 FR 21208, May 17, 1982; 47 FR 27293, June 24, 1982]



Sec.  153.351  Location of 4m vent discharges.

    Except as prescribed in Sec.  153.353, a 4m venting system must 
discharge:
    (a) At least 4m (approx. 13.1 ft) above the higher of:
    (1) the weatherdeck; or
    (2) any walkway that is within a 4m (approx. 13.1 ft) horizontal 
radius from the vent discharge.
    (b) At least 10m (approx. 32.8 ft) from air intakes for, or openings 
into, accommodation or service spaces.

[CGD 78-128, 47 FR 21208, May 17, 1982]



Sec.  153.352  B/3 and 4 m venting system outlets.

    A B/3 or 4 m venting system outlet must:
    (a) Discharge vertically upwards; and

[[Page 234]]

    (b) Prevent precipitation from entering the vent system.



Sec.  153.353  High velocity vents.

    The discharge point of a B/3 or 4m venting system must be located at 
least 3m (approx. 10 ft) above the weatherdeck or walkway if:
    (a) The discharge is a vertical, unimpeded jet;
    (b) The jet has a minimum exit velocity of 30 m/sec (approx. 98.4 
ft/sec); and
    (c) The high velocity vent has been approved by Commandant (CG-ENG).

[CGD 78-128, 47 FR 21208, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  153.354  Venting system inlet.

    A venting system must terminate in the vapor space above the cargo 
when the tank is filled to a 2 percent ullage and the tankship has no 
heel or trim.



Sec.  153.355  PV venting systems.

    When Table 1 requires a PV venting system, the cargo tank must have 
a PV valve in its vent line. The PV valve must be located between the 
tank and any connection to another tank's vent line (such as a vent 
riser common to two or more tanks).



Sec.  153.358  Venting system flow capacity.

    (a) The cross-sectional flow area of any vent system segment, 
including any PV or SR valve, must at no point be less than that of a 
pipe whose inside diameter is 6.4 cm (approx. 2.5 in.).
    (b) When Table 1 requires a closed or restricted gauging system, 
calculations must show that, under conditions in which a saturated cargo 
vapor is discharged through the venting system at the maximum 
anticipated loading rate, the pressure differential between the cargo 
tank vapor space and the atmosphere does not exceed 28 kPa gauge 
(approx. 4 psig), or, for independent tanks, the maximum working 
pressure of the tank.



Sec.  153.360  Venting system restriction.

    A venting system must have no assembly that could reduce its cross-
sectional flow area or flow capacity to less than that required in Sec.  
153.358.



Sec.  153.361  Arrangements for removal of valves from venting
systems having multiple relief valves.

    A venting system having multiple relief valves may be arranged to 
allow the removal of a valve (for repair, as an example) provided the 
venting system:
    (a) Has valves that are interlocked, so that the removal of a valve 
does not reduce the venting system relieving capacity below the minimum 
relieving capacity required by Sec.  153.358; and
    (b) Is arranged so that cargo vapor will not escape through the 
opening left after a valve has been removed.

[CGD 78-128, 47 FR 21208, May 17, 1982; 47 FR 27293, June 24, 1982]



Sec.  153.362  Venting system drain.

    Unless a cargo vent system at every point is level or slopes back to 
the cargo tank under all conditions of heel and trim allowed under Sec.  
153.806, the cargo vent system must have a drain valve at each low point 
(trap) in the vent line.



Sec.  153.364  Venting system supports.

    Supports for a vent system must meet Sec.  38.10-10(c) of this 
chapter.



Sec.  153.365  Liquid overpressurization protection.

    (a) Except as noted in paragraph (b) of this section, a containment 
system requiring closed or restricted gauging must:
    (1) Be designed to withstand the maximum pressure that develops 
during an overfill of the densest cargo endorsed for the containment 
system; or
    (2) Have an overflow control system that meets Sec.  153.408; or
    (3) Meet the requirements specified by the Commandant (CG-ENG).
    (b) A containment system requiring restricted gauging, except for 
those cargoes that reference Sec. Sec.  153.525 or 153.527, may be 
equipped with a spill valve that:
    (1) Meets ASTM F 1271 (incorporated by reference, see Sec.  153.4); 
and
    (2) Limits the maximum pressure during liquid overfill at a 
specified cargo loading rate to that which the

[[Page 235]]

containment system is able to withstand (see Sec. Sec.  153.294(b) and 
152.977(b)).

[CGD 78-128, 47 FR 21208, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 88-032, 56 FR 35827, July 29, 1991; USCG-2000-
7790, 65 FR 58463, Sept. 29, 2000]



Sec.  153.368  Pressure-vacuum valves.

    (a) The pressure side of a required pressure-vacuum relief valve 
must begin to open only at a pressure exceeding 3.5 kPa gauge (approx. 
0.5 psig).
    (b) A pressure-vacuum relief valve must meet the requirements of 
Subpart 162.017 of this chapter.



Sec.  153.370  Minimum relief valve setting for ambient temperature
cargo tanks.

    The relief valve setting for a containment system that carries a 
cargo at ambient temperature must at least equal the cargo's vapor 
pressure at 46 [deg]C (approx. 115 [deg]F).

[CGD 81-078, 50 FR 21173, May 22, 1985]



Sec.  153.371  Minimum relief valve setting for refrigerated cargo
tanks.

    The relief valve setting for a containment system that carries a 
refrigerated cargo must at least equal the lesser of:
    (a) That in Sec.  153.370; or
    (b) 110 percent of the cargo's vapor pressure at the steady state 
temperature obtained by a full tank of cargo with the refrigeration 
system operating under ambient conditions described within the 
definition of a refrigerated tank in Sec.  153.2.



Sec.  153.372  Gauges and vapor return for cargo vapor pressures
exceeding 100 kPa (approx. 14.7 psia).

    When table 1 references this section, the containment system must 
have a:
    (a) Tank pressure gauge at the point where cargo flow is controlled 
during transfer; and
    (b) Vapor return connection.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977; 42 FR 57126, Nov. 1, 1977, as 
amended by CGD 81-078, 50 FR 21173, May 22, 1985]

                          Cargo Gauging Systems



Sec.  153.400  General requirements for gauges.

    (a) Columnar gauge glasses must not be installed on a cargo 
containment system.
    (b) Flat sight glasses must meet Sec.  38.10-20(h) of this chapter.



Sec.  153.404  Standards for containment systems having required 
closed gauges.

    When Table 1 requires a cargo's containment system to have a closed 
gauge, the containment system must have the following:
    (a) A permanently installed closed gauging system.
    (b) A vapor return connection.
    (c) The high level alarm described in Sec.  153.409.
    (d) Either a closed cargo sampling system or a cargo sampling 
arrangement allowing the retrieval of a sample through an orifice not 
exceeding:
    (1) 0.635 cm (approx. 0.25 in.) diameter when the cargo's vapor 
pressure is 28 kPa gauge (approx. 4 psig) or less; or
    (2) 0.140 cm (approx. 0.055 in.) diameter when the cargo's vapor 
pressure exceeds 28 kPa (approx. 4 psig).



Sec.  153.406  Standards for containment systems having required
restricted gauges.

    When Table 1 requires a cargo's containment system to have a 
restricted gauge, the containment system must have:
    (a) A closed gauging system; or
    (b) A system that has:
    (1) A restricted gauge (e.g., a sounding tube) with an orifice 
diameter not exceeding 20 cm (approx. 7.8 in.);
    (2) A permanently attached gauge cover that is vapor tight when in 
place; and
    (3) A venting system that has either:
    (i) Lock open PV valves; or
    (ii) Valved bypasses around the PV valves.



Sec.  153.407  Special requirements for sounding tube gauges.

    (a) A sounding tube installed as a restricted gauge must extend to 
within one meter (approx. 39.4 in.) of the bottom of the tank.

[[Page 236]]

    (b) A sounding tube must not be installed on a tank whose relief 
valve setting exceeds 28 kPa (approx. 4 psig) unless it is specifically 
permitted by the Commandant (CG-ENG).
    (c) A sounding tube must have no perforations in the tube wall.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983]



Sec.  153.408  Tank overflow control.

    (a) When table 1 references this section, a cargo containment system 
must have a cargo high level alarm meeting Sec.  153.409 and one of the 
following additional systems:
    (1) A second high level (cargo overflow) alarm.
    (2) A system that automatically stops cargo flow to the tank 
(automatic shutdown system).
    (b) The high level alarm and the cargo overflow alarm or automatic 
shutdown system must:
    (1) Be independent of one-another; and
    (2) Operate on loss of power.
    (c) The cargo overflow alarm or the automatic shutdown system must 
operate early enough to:
    (1) Stop the loading operation before the cargo tank overflows; and
    (2) Avoid surge pressures that exceed the working pressure specified 
in Sec.  153.294(b).
    (d) A tank overflow must be identified with the legend ``TANK 
OVERFLOW ALARM'' in lettering as specified for the warning sign in Sec.  
153.955.
    (e) A tank overflow alarm must be audible and visible in that part 
of the deck where the containment systems are located and at the point 
where cargo loading is controlled on the tankship.
    (f) The automatic shutdown system or tank overflow alarm must be 
able to be checked at the tank for proper operation (for example, by 
electrically simulating an overfill at the tank gauge connection).
    (g) In this section, ``independent'' as applied to two systems means 
that one system will operate with a failure of any part of the other 
system except high level power sources and electrical feeder panels. 
Conduit need not be independent; the control wiring for several 
independent systems may be carried in a single conduit.

[CGD 81-078, 50 FR 21173, May 22, 1985]



Sec.  153.409  High level alarms.

    When Table 1 refers to this section or requires a cargo to have a 
closed gauging system, the cargo's containment system must have a high 
level alarm:
    (a) That gives an audible and visual alarm before the tank fills to 
97 percent of its capacity;
    (b) That can be seen and heard where cargo transfer is controlled 
and on the open deck;
    (c) Whose operation can be checked prior to each loading; and
    (d) That must be marked as described in Sec.  153.408(c)(6) with the 
legend ``HIGH LEVEL ALARM.''

[CGD 78-128, 47 FR 21209, May 17, 1982; 47 FR 27293, June 24, 1982]

                    Cargo Temperature Control Systems



Sec.  153.430  Heat transfer systems; general.

    Each cargo cooling system required by this part and each cargo 
heating system must:
    (a) Meet the standards of Subchapters F (Marine Engineering) and J 
(Electrical Engineering) of this chapter;
    (b) Have valving that enables the system to be separated from all 
other cooling and heating systems; and
    (c) Allow manual regulation of the system's heat transfer rate.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21209, May 17, 1982; CGD 81-078, 50 FR 21174, May 22, 1985]



Sec.  153.432  Cooling systems.

    (a) Each cargo cooling system must have an equivalent standby unit 
that is installed and that can be placed in operation immediately after 
failure of the primary cooling system.
    (b) Each tankship that has a cargo tank with a required cooling 
system must have a manual that contains:
    (1) A piping diagram for the cooling system; and

[[Page 237]]

    (2) Instructions for changing over to the standby system described 
in paragraph (a) of this section.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21209, May 17, 1982]



Sec.  153.434  Heat transfer coils within a tank.

    When a cargo tank contains any quantity of cargo, a cargo cooling or 
heating system having coils within the tank must keep the heat transfer 
fluid at a pressure greater than the pressure exerted on the heating or 
cooling system by the cargo.

[CGD 78-128, 47 FR 21209, May 17, 1982]



Sec.  153.436  Heat transfer fluids: compatibility with cargo.

    A heat transfer fluid separated from the cargo by only one wall (for 
example, the heat transfer fluid in a coil within a tank) must be 
compatible with the cargo under the standards prescribed for 
compatibility between two cargoes in Part 150 of this chapter.

[CGD 81-078, 50 FR 21174, May 22, 1985]



Sec.  153.438  Cargo pressure or temperature alarms required.

    (a) Each refrigerated tank must have:
    (1) An alarm that operates when the cargo's pressure exceeds the 
vapor pressure described in Sec.  153.371(b); or
    (2) An alarm that operates when the cargo's temperature exceeds the 
steady state temperature described in Sec.  153.371(b).
    (b) The alarm must give an audible and visual signal on the bridge 
and at the cargo control station.
    (c) The cargo pressure or temperature alarm must be independent of 
other cargo pressure or temperature sensing arrangements.



Sec.  153.440  Cargo temperature sensors.

    (a) Except as prescribed in paragraph (c) of this section, when 
Table 1 refers to this section, the containment system must meet the 
following requirements:
    (1) A heated or refrigerated cargo tank must have a remote reading 
thermometer sensing the temperature of the cargo at the bottom of the 
tank.
    (2) A refrigerated tank must have a remote reading second 
thermometer near the top of the tank and below the maximum liquid level 
allowed by Sec.  153.981.
    (3) Unless waived under Sec.  153.491(a), a cargo tank endorsed to 
carry a Category A, B, or C NLS cargo must have a thermometer whose 
temperature reading is no greater than the temperature of the cargo at a 
level above the tank bottom at least one-eighth but no more than one-
half the height of the tank if the cargo is--
    (i) A Category A NLS or a Category B NLS having a viscosity of at 
least 25 mPa.s at 20 [deg]C;
    (ii) A Category C NLS having a viscosity of at least 60 mPa.s at 20 
[deg]C; or
    (iii) A Category A, B, or C NLS that has a melting point greater 
than 0 [deg]C.
    (b) A readout for each remote thermometer required by this section 
must be at the point where cargo transfer is controlled.
    (c) A portable thermometer may be substituted for the equipment 
required in paragraphs (a) and (b) of this section if--
    (1) Table 1 allows open gauging with the cargo; or
    (2) Table 1 allows restricted gauging with the cargo, and the 
portable thermometer is designed to be used through the containment 
system's restricted gauging system.

[CGD 78-128, 47 FR 21209, May 17, 1982, as amended by CGD 81-101, 52 FR 
7781, Mar. 12, 1987; CGD 81-101, 53 FR 28974, Aug. 1, 1988 and 54 FR 
12629, Mar. 28, 1989]

        Special Requirements for Flammable or Combustible Cargoes



Sec.  153.460  Fire protection systems.

    Each self-propelled ship and each manned non-self-propelled ship 
must meet the following:
    (a) With the exception of the vent riser, each part of a cargo 
containment system exposed on the weatherdeck must be covered by the 
fire protection system listed beside the cargo in Table 1 and described 
in the footnotes to Table 1.
    (b) The Commandant (CG-ENG) approves the substitution of a dry 
chemical (D) type fire protection system for an A or B type on a case by 
case basis.

[[Page 238]]

    (c) A fire protection system required by this part must meet part 34 
of this chapter or be specifically approved by the Commandant (CG-ENG).

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983; CGD 81-101, 52 FR 7781, Mar. 12, 1987]



Sec.  153.461  Electrical bonding of independent tanks.

    An independent metallic cargo tank that carries a flammable or 
combustible cargo must be electrically bonded to the tankship's hull.



Sec.  153.462  Static discharges from inert gas systems.

    An inert gas system on a tank that carries a flammable or 
combustible cargo must not create static arcing as the inert gas is 
injected into the tank.



Sec.  153.463  Vent system discharges.

    The discharge of a venting system must be at least 10 m (approx. 
32.8 ft) from an ignition source if:
    (a) The cargo tank is endorsed to carry a flammable or combustible 
cargo; and
    (b) Table 1 requires the cargo to have a PV venting system.



Sec.  153.465  Flammable vapor detector.

    (a) A tankship that carries a flammable cargo must have two vapor 
detectors that meet Sec.  35.30-15(b) of this chapter.
    (b) At least one of the vapor detectors in paragraph (a) of this 
section must be portable.



Sec.  153.466  Electrical equipment.

    A tankship carrying a flammable or combustible cargo under this part 
must meet subchapter J of this chapter.

               Design and Equipment for Pollution Control

    Source: Sections 153.470 through 153.491 appear at CGD 81-101, 52 FR 
7781, Mar. 12, 1987, unless otherwise noted.



Sec.  153.470  System for discharge of NLS residue to the sea:
Categories A, B, C, and D.

    Unless waived under Sec.  153.491, each ship that discharges 
Category A, B, or C NLS residue, or Category D NLS residue not diluted 
to \1/10\th of its original concentration, into the sea under Sec. Sec.  
153.1126 and 153.1128 must have an NLS residue discharge system meeting 
the following:
    (a) Minimum diameter of an NLS residue discharge outlet. The outlet 
of each NLS residue discharge system must have a diameter at least as 
great as that given by the following formula:
[GRAPHIC] [TIFF OMITTED] TC13NO91.044

where:

D = Minimum diameter of the discharge outlet in meters.
Qd = Maximum rate in cubic meters per hour at which the ship 
          operator wishes to discharge slops (note: Qd 
          affects the discharge rate allowed under Sec.  
          153.1126(b)(2)).
L = Distance from the forward perpendicular to the discharge outlet in 
          meters.
[phis] = The acute angle between a perpendicular to the shell plating at 
          the discharge location and the direction of the average 
          velocity of the discharged liquid.

    (b) Location of an NLS residue discharge outlet. Each NLS residue 
discharge outlet must be located--
    (1) At the turn of the bilge beneath the cargo area; and
    (2) Where the discharge from the outlet is not drawn into the ship's 
seawater intakes.
    (c) Location of dual NLS residue discharge outlets. If the value of 
6.45 for K is used in Sec.  153.1126(b)(2), the NLS residue discharge 
system must have two outlets located on opposite sides of the ship.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28974, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989; CGD 95-028, 62 FR 
51209, Sept. 30, 1997]



Sec.  153.480  Stripping quantity for Category B and C NLS tanks on
ships built after June 30, 1986: Categories B and C.

    Unless waived under Sec.  153.491, Category B and C NLS cargo tanks 
on each ship built after June 30, 1986 must have stripping quantities 
determined under Sec.  153.1604 that are less than--
    (a) 0.15 m\3\ if Category B; and
    (b) 0.35 m\3\ if Category C.

[[Page 239]]



Sec.  153.481  Stripping quantities and interim standards for
Category B NLS tanks on ships built before July 1, 1986: Category B.

    Unless waived under Sec.  153.483 or Sec.  153.491, each Category B 
NLS cargo tank on ships built before July 1, 1986 must meet the 
following:
    (a) Unless the tank meets the interim standard provided by paragraph 
(b) of this section and is prewashed in accordance with Sec.  153.1118, 
the tank must have a stripping quantity determined under Sec.  153.1604 
that is less than 0.35m \3\.
    (b) Before October 3, 1994, the tank may have a total NLS residue 
determined under Sec.  153.1608 that is less than 1.0 m\3\ or \1/3000\th 
of the tank's capacity and an NLS residue discharge system meeting the 
following:
    (1) The system must be capable of discharging at a rate equal to or 
less than Q in the following formula:

Q = K U\1.4\ L\1.6\ x 10-5 m\3\/hr

where:

K = 4.3, except K = 6.45 if the discharge is equally distributed between 
          two NLS residue discharge outlets on opposite sides of the 
          ship (see Sec. Sec.  153.470(c) and 153.1126(b)).
L = ship's length in meters.
U = for a ship that is self-propelled, the minimum speed in knots 
          specified in the approved Procedures and Arrangements Manual 
          for discharging Category B NLS residue, but at least 7;
U = for a ship that is not self-propelled, the minimum speed in knots 
          specified in the approved Procedures and Arrangements Manual 
          for discharging Category B NLS residue, but at least 4.

    (2) The system must have equipment capable of automatically 
recording--
    (i) The time of day that discharge of NLS residue through the 
residue discharge system starts and ends; and
    (ii) The dates on which discharge begins and ends unless the 
equipment allows a person to enter these dates on the record manually.
    (3) Each system that has the capacity to exceed Q calculated in 
paragraph (b)(1) of this section must have equipment that--
    (i) Records the NLS residue flow through the system; and
    (ii) Is sufficiently accurate that its recorded values averaged over 
any 30 second period differ no more than 15% from the actual flow 
averaged over the same 30 second period.
    (4) Each system that has the capacity to exceed Q calculated under 
paragraph (b)(1) of this section and does not automatically control the 
flow rate must have--
    (i) Manual controls that enable the flow to be adjusted to the value 
of Q calculated in paragraph (b)(1) of this section and that must be 
moved through at least 25% of their total range of movement for the 
discharge rate to change from 0.5Q to 1.5Q; and
    (ii) A flow rate meter located where the flow is manually 
controlled.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28974, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.482  Stripping quantities and interim standards for
Category C NLS tanks on ships built before July 1, 1986: Category C.

    Unless waived under Sec.  153.483 or Sec.  153.491, each Category C 
NLS cargo tank on ships built before July 1, 1986 must meet the 
following:
    (a) Unless the tank meets the interim standard provided by paragraph 
(b) of this section, the tank must have a stripping quantity determined 
under 153.1604 that is less than 0.95 m\3\.
    (b) Before October 3, 1994, the tank may have a total NLS residue 
determined under Sec.  153.1608 that is less than 3.0 m\3\ or 1/1000th 
of the tank's capacity.



Sec.  153.483  Restricted voyage waiver for Category B and C NLS
tanks on ships built before July 1, 1986: Category B and C.

    At its discretion the Coast Guard waives Sec. Sec.  153.481 and 
153.482 under this section and allows a ship to carry Category B and C 
NLS cargoes between ports or terminals in one or more countries 
signatory to MARPOL 73/78 if the ship's owner requests a waiver 
following the procedures in Sec.  153.10 and includes--
    (a) A written pledge to--
    (1) Limit the loading and discharge of Category B and C NLS cargoes 
in a foreign port to those ports and terminals in countries signatory to 
MARPOL 73/78 and listed in accordance with paragraph (b) of this 
section; and

[[Page 240]]

    (2) Prewash the cargo tank as required under Sec.  153.1118 after 
each Category B or C NLS is unloaded unless the prewash is allowed to be 
omitted under Sec.  153.1114;
    (b) A list of--
    (1) All foreign ports or terminals at which the ship is expected to 
load or discharge Category B or C NLS cargo, and
    (2) All foreign ports or terminals at which the ship is expected to 
discharge Category B or C NLS residue from the tank;
    (c) An estimate of the quantity of NLS residue to be discharged to 
each foreign port or terminal listed under paragraph (b)(2) of this 
section;
    (d) Written statements from the owners of adequate reception 
facilities in the ports and terminals listed in accordance with 
paragraph (b)(2) of this section who have agreed to take NLS residue 
from the ship, showing the amount of NLS residue each agrees to take; 
and
    (e) A written attestation from the person in charge of each port or 
terminal listed in accordance with paragraph (b)(1) of this section that 
the administration has determined the port or terminal to have adequate 
reception facilities for the NLS residue.

    Note to Sec.  153.483: Certificates of Inspection and any IMO 
Certificates issued to ships on restricted voyage waivers indicate that 
while the ship carries an NLS cargo or NLS residue, it is limited to 
voyages between the ports or terminals listed on the certificate.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.484  Prewash equipment.

    Unless the ship operator shows that the prewash equipment specified 
in this section will be available at discharge or prewash facilities or 
the equipment is waived under Sec.  153.491, to have its Certificate of 
Inspection or Certificate of Compliance endorsed to carry a Category A 
NLS or a Category B or C NLS requiring viscosity or melting point 
information under Sec.  153.908 (a) and (b), a ship must have the 
following:
    (a) For the tanks that carry the NLS, a tank washing system capable 
of washing all interior tank surfaces except those shielded from the 
washing system spray by ship's structure, and consisting of a wash water 
supply system and--
    (1) A fixed tank washing machine in each tank; or
    (2) A portable tank washing machine and, if required by the Coast 
Guard, equipment to move it during washing and when storing.
    (b) Piping, valving, and crossovers needed to arrange the cargo 
piping so that the wash water passes through the cargo pump and cargo 
piping during tank washing or discharge of tank wash water.
    (c) If the approved Procedures and Arrangements Manual specifies the 
hot water prewash required under 153.1108, a means of supplying water to 
the tank washing machine under paragraph (a) of this section at--
    (1) A temperature of at least 60 [deg]C (140 [deg]F) when it leaves 
the washing machine; and
    (2) The flow rate needed for the washing machine jets to meet 
paragraph (a) of this section.



Sec.  153.486  Design and equipment for removing NLS residue by
ventilation: Categories A, B, C, and D.

    (a) If NLS residue is to be removed from a cargo tank by 
ventilation, in addition to the equipment required under paragraph (b) 
of this section the ship must have--
    (1) Openings in the tank deck near the sump or suction point;
    (2) If the openings required by paragraph (a)(1) of this section are 
insufficient, an access opening for visually determining whether liquid 
remains in the sump area of the cargo tank after ventilation or some 
other means for making this determination; and
    (3) An approved Procedures and Arrangements Manual with instructions 
that meet Sec.  153.490(b)(3).
    (b) Unless the ship operator shows that the ventilation equipment 
specified in this paragraph will be available from shore when needed, if 
NLS residue is to be removed from a cargo tank by ventilation, in 
addition to the equipment required under paragraph (a) of this section 
the ship must have--
    (1) Portable forced air ventilating equipment fitting the 
ventilation openings required in paragraph (a) of this

[[Page 241]]

section and able to ventilate the extremities of the tank to the extent 
prescribed in Appendix C of the IMO Standards for Procedures and 
Arrangements for the Discharge of Noxious Liquid Substances, Resolution 
MEPC 18(22), 1985; and
    (2) A connector that allows a fan or air supply to be connected to 
the hose connections for the tank at the manifold.

    Note: The Clean Air Act (42 U.S.C. 7401 et seq.) allows states to 
regulate emissions from tank ventilation. There may be other 
regulations, both local and Federal, that affect the use of tank 
ventilation for safety or environmental purposes.



Sec.  153.488  Design and equipment for tanks carrying high melting 
point NLSs: Category B.

    Unless waived under Sec.  153.491, for a ship to have its 
Certificate of Inspection or Certificate of Compliance endorsed allowing 
a tank to carry a Category B NLS with a melting point of 15 [deg]C or 
more, the cargo tank must have--
    (a) An arrangement enabling the cargo to be heated before cargo 
transfer, using heat supplied by the ship or by another source; and
    (b) Sides and bottom separate from the ship's side or bottom shell 
plating.



Sec.  153.490  Cargo Record Book and Approved Procedures and 
Arrangements Manual: Categories A, B, C, and D.

    (a) Unless waived under Sec.  153.491, to have a Certificate of 
Inspection or Certificate of Compliance endorsed to carry NLS cargo, a 
ship must have--
    (1) If U.S., a Cargo Record Book published by the Coast Guard (OMB 
App. No. 1625-0094), or, if foreign, a Cargo Record Book having the same 
entries and format as Appendix 4 of Annex II; and
    (2) A Procedures and Arrangements Manual meeting paragraph (b) of 
this section and approved by--
    (i) The Coast Guard, if the ship is a United States ship or one 
whose Administration is not signatory to MARPOL 73/78; or
    (ii) The Administration, if the ship is one whose Administration is 
signatory to MARPOL 73/78.
    (b) Each Procedures and Arrangements Manual under paragraph (a)(2) 
of this section must include the following:
    (1) The standard format and content prescribed in Chapter 2 and 
Appendix D of the IMO Standards for Procedures and Arrangements for the 
Discharge of Noxious Liquid Substances, Resolution MEPC 18(22), 1985, 
or, for ships for which the only NLS carried is a Category D NLS and 
ships having a waiver under Sec.  153.483 or Sec.  153.491, the format 
and content prescribed by the Commandant (CG-ENG).
    (2) If the ship has a tank that carries a cargo under a waiver 
issued under Sec.  153.483, procedures ensuring that--
    (i) Category B and C NLSs are discharged from the tank only in the 
ports or terminals listed in accordance with Sec.  153.483(b); and
    (ii) The tank is prewashed after discharging each Category B or C 
NLS unless Sec.  153.1114 allows the prewash to be omitted.
    (3) If ventilation is used to clean a tank under Sec.  
153.1102(b)(2), ventilation procedures that meet those in Appendix C of 
the IMO Standards for Procedures and Arrangements for the Discharge of 
Noxious Liquid Substances, Resolution MEPC 18(22), 1985.
    (4) If tank cleaning agents are used, quantities to use and 
instructions for using the cleaning agents.
    (5) If the tank has the discharge recording equipment required in 
Sec.  153.481(b), procedures to ensure that no NLS residue is discharged 
from the tank when the recording equipment is incapacitated unless the 
concentration and total quantity limits for the NLS in Annex II are not 
exceeded.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989; USCG-2006-25697, 71 
FR 55747, Sept. 25, 2006]



Sec.  153.491  Waiver of certain equipment for dedicated cargo tanks.

    (a) The Coast Guard waives Sec. Sec.  153.440(a)(3), 153.480, 
153.481, 153.482, and 153.488 and endorses a ship's Certificate of 
Inspection or Certificate of Compliance allowing a cargo tank to carry a 
single, specific NLS cargo and no other cargo if the ship's owner--
    (1) Requests a waiver following the procedures in Sec.  153.10; and

[[Page 242]]

    (2) Pledges in writing that while any waiver is in effect the cargo 
tank will--
    (i) Carry only the NLS cargo listed on the Certificate of Inspection 
or Certificate of Compliance;
    (ii) Carry no cargo other than the NLS; and
    (iii) Not be washed or ballasted unless the wash water or ballast 
water is discharged to a reception facility.
    (b) The Coast Guard waives Sec. Sec.  153.470 and 153.490(a)(2) if--
    (1) The ship's owner requests a waiver following the procedures in 
Sec.  153.10;
    (2) The Coast Guard has issued a waiver to each of the ship's NLS 
cargo tanks under paragraph (a) of this section; and
    (3) The ship's owner adds to the ship's operational manual any 
provisions for preventing NLS discharge specified by the Commandant (CG-
ENG) as a condition for issuing the waiver.

[CGD 81-101, 52 FR 7781, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]

                          Special Requirements



Sec.  153.500  Inert gas systems.

    When Table 1 refers to this section, a cargo containment system must 
have a permanent inert gas system that:
    (a) Maintains the vapor space of the containment system in an inert 
state by filling the vapor space with a gas that is neither reactive 
with the cargo nor flammable;
    (b) Has a pressure control system that:
    (1) Prevents the inert gas system from raising the cargo tank 
pressure to more than the relief valve setting; and
    (2) Maintains at least a 3.5 kPa gauge (approx. 0.5 psig) pressure 
within the containment system at all times, including cargo discharge;
    (c) Has storage for enough inerting gas to replace that normally 
lost while the tank's atmosphere is maintained in an inert condition 
(e.g. through tank breathing and relief valve leakage), but in no case 
an amount less than 5 percent of the tank's capacity when measured with 
the gas at -18 [deg]C (approx. 0 [deg]F) and a pressure equal to the 
cargo tank's relief valve setting; and
    (d) Has connections for any supplemental gas supply necessary to 
maintain the inert gas pressure described in paragraph (b) of this 
section during cargo discharge.



Sec.  153.501  Requirement for dry inert gas.

    When Table 1 refers to this section, an inert gas system for the 
containment system must supply inert gas containing no more than 100 ppm 
water.



Sec.  153.515  Special requirements for extremely flammable cargoes.

    When Table 1 refers to this section:
    (a) An enclosed space containing a cargo tank must have an inerting 
system that meets the requirements in Sec.  153.500 applying to the 
inert gas system of a containment system;
    (b) Cargo discharge pumps must be of a type that does not subject 
the shaft gland to the cargo under pressure or that is submerged; and
    (c) The cargo tank's relief valve setting must be no less than 21 
kPa gauge (approx. 3 psig).



Sec.  153.520  Special requirements for carbon disulfide.

    A containment system carrying carbon disulfide must meet the 
following:
    (a) Each cargo pump must be of the intank type and encased within a 
cylindrical well that extends from the top of the tank to a point no 
more than 10 cm (approx. 4 in.) above the bottom of the tank.
    (b) [Reserved]
    (c) The cargo piping and venting systems must be completely 
independent of those for other cargo.
    (d) Pressure relief valves must be made of type 304 or 316 stainless 
steel.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21209, May 17, 1982]



Sec.  153.525  Special requirements for unusually toxic cargoes.

    When Table 1 refers to this section a containment system must meet 
the following:
    (a) Cargo piping and venting systems must be designed so that they 
can be separated from any containment system endorsed for a cargo not 
covered by this section.

[[Page 243]]

    (b) A cargo tank's relief valve setting must be not less than 21 kPa 
gauge (approx. 3 psig).
    (c) All cargo pumps and valves located below the weatherdeck must be 
operable from the weatherdeck.
    (d) A heat transfer system for the cargo must:
    (1) Be independent of other ship service systems, except for other 
cargo heat transfer systems, and not enter the engine room;
    (2) Be totally external to the cargo containment system; or
    (3) Be approved by the Commandant (CG-ENG) for use with toxic 
cargoes.
    (e) The cargo must be separated from any bunkers by at least two 
bulkheads.
    (f) A cargo containment system must have a vapor return connection.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21209, May 17, 1982; CGD 82-063b, 48 FR 4782, Feb. 3, 1983]



Sec.  153.526  Toxic vapor detectors.

    (a) When Table 1 refers to this section, a tankship must have two 
toxic vapor detectors, at least one of which must be portable, each able 
to measure vapor concentrations in the range of the time weighted 
average (TWA) for the cargo. The portable detector may be a direct 
reading detector tube instrument. These vapor detectors may be combined 
with those required by Sec.  153.465.
    (b) When the toxic vapor detectors required by paragraph (a) of this 
section are not available and the cargo referenced to this section is 
transferred through a cargo pumproom, the tankship must meet Sec.  
153.336(b).

[CGD 78-128, 47 FR 21210, May 17, 1982]



Sec.  153.527  Toxic vapor protection.

    When Table 1 refers to this section, a tankship must have on board 
for each crew member:
    (a) An emergency escape breathing apparatus (EEBA) approved by the 
Mining Safety and Health Administration (formerly the Mining Enforcement 
and Safety Administration) and the National Institute for Occupational 
Safety and Health, or the tankship's flag administration.
    (b) Where the emergency escape breathing apparatus does not protect 
the eyes from vapors, a set of goggles that either:
    (1) Meet the specifications of ANSI Practice for Occupational and 
Educational Eye and Face Protection, Z-87.1(1979); or
    (2) Are approved by the tankship's flag administration.

[CGD 78-128, 47 FR 21210, May 17, 1982]



Sec.  153.530  Special requirements for alkylene oxides.

    When Table 1 refers to this section, a containment system must meet 
the following:
    (a) Except as provided in paragraphs (b) and (c) of this section, a 
cargo containment system must be made of:
    (1) Stainless steel other than types 416 and 442; and
    (2) Steel.
    (b) Except as provided in paragraph (c) of this section, gaskets 
must be composites of spirally wound stainless steel and Teflon or 
similar fluorinated polymer.
    (c) The Commandant (CG-ENG) approves a cargo containment system 
using materials other than those described in this section for alkylene 
oxides on a case by case basis if:
    (1) The person wishing to have the containment system approved 
completes any tests prescribed by the Commandant (CG-ENG); and
    (2) The Commandant (CG-ENG) approves the results of the tests and 
the material for use with alkylene oxides.
    (d) The following materials are generally found unsatisfactory for 
gaskets, packing, insulation, and similar uses in alkylene oxide 
containment systems and would require extensive testing as described in 
paragraph (c) of this section before being approved:
    (1) Neoprene or natural rubber if it might be in contact with the 
alkylene oxide.
    (2) Asbestos or asbestos mixed with other materials such as with 
many common insulations, packing materials, and gasket materials.
    (3) Materials containing oxides of magnesium, such as mineral wools.
    (e) The tank's relief valve setting must not be less than 21 kPa 
gauge (approx. 3 psig).

[[Page 244]]

    (f) If the containment system is equipped with a cooling system, the 
cooling system must:
    (1) Not compress the cargo; and
    (2) Regulate the cargo temperature automatically and allow manual 
regulation.
    (g) The cargo piping system must:
    (1) Comply with Part 38 of this chapter;
    (2) Be completely separate from all other systems;
    (3) Be assembled from valves, fittings, and accessories having a 
pressure rating of not less than 1030 kPa gauge (approx. 150 psig) 
(American National Standards Institute); and
    (4) Have no threaded joints.
    (h) The cargo containment system vapor space and each space listed 
in paragraphs (k) and (l) of this section must have continuous 
monitoring of oxygen concentration or have an arrangement to enable 
sampling with a portable oxygen analyzer.
    (i) Valve disks or disk faces, seats, and other wearing valve parts 
must be made of stainless steel containing no less than 11 percent 
chromium.
    (j) The venting system must be independent of other containment or 
tankship systems.
    (k) When a cargo tank is in an enclosed space, the space must have:
    (1) An inert gas system meeting the requirements that apply to the 
inert gas system of a containment system in Sec.  153.500, or
    (2) A forced ventilation system meeting the requirements that apply 
to a cargo handling space ventilation system in Sec.  153.312.
    (l) Cofferdams, cargo tanks, double bottom spaces, void spaces and 
other enclosed spaces adjacent to an integral cargo tank must have an 
inert gas system meeting the requirements that apply to the inert gas 
system of a containment system in Sec.  153.500.
    (m) An intank pump or inert gas displacement must be used to 
discharge cargo.
    (n) The cargo discharge piping system must have a remotely actuated 
quick closing shutoff valve that meets Sec.  153.284 at the cargo 
transfer hose connection.
    (o) Cargo hose must:
    (1) Have the specific approval of the Commandant (CG-ENG) for use in 
alkylene oxide transfer; and
    (2) Be marked ``For Alkylene Oxide Transfer Only''.
    (p) All exposed parts of the cargo containment system above or on 
the deck, such as tank domes, cargo piping, and loading manifolds, must 
be covered by a water spray system that:
    (1) Operates automatically in a fire involving the cargo containment 
system;
    (2) Has at least two remote manual actuators, one in each emergency 
shutdown station required by Sec.  153.296; and
    (3) Covers the area of application with a uniform spray of

0.175 l/m\2\ sec (0.0043 gal/ft\2\ sec).

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21210, May 17, 1982; CGD 82-063b, 48 FR 4782, Feb. 3, 1983; CGD 82-063b, 
48 FR 39629, Sept. 1, 1983; CGD 81-078, 50 FR 21174, May 22, 1985; USCG-
2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  153.545  Special requirements for liquid sulfur.

    (a) A containment system carrying liquid sulfur must have:
    (1) A cargo tank ventilation system that:
    (i) Maintains the H2S vapor concentration below 1.85 
percent by volume; and
    (ii) Prevents sulfur buildup within itself; and
    (2) An alarm system designed to operate when the ventilation system 
blower fails.
    (b) The void spaces around a cargo tank that carries liquid sulfur 
must be oil tight.
    (c) A cargo tank that carries liquid sulfur and the void spaces 
surrounding the tank must have connections for sampling vapor.



Sec.  153.554  Special requirements for acids.

    When Table 1 refers to this section:
    (a) Each containment system loading and discharge connection must 
have a spray shield;
    (b) Each cargo containment system must be separated from bunkers by 
double walls, such as a cofferdam and piping tunnels; and

[[Page 245]]

    (c) Each vessel must have on board a means to determine whether 
cargo has leaked into the spaces adjacent to a cargo containment system.



Sec.  153.555  Special requirements for inorganic acids.

    When Table 1 refers to this section, a tankship's shell plating must 
not be a part of the cargo tank.

[CGD 78-128, 47 FR 21210, May 17, 1982]



Sec.  153.556  Special requirements for sulfuric acid and oleum.

    (a) Except as prescribed in paragraphs (b) and (c) of this section, 
containment systems carrying sulfuric acid, oleum, or contaminated 
sulfuric acid are approved by the Commandant (CG-ENG) on a case by case 
basis.
    (b) A containment system carrying sulfuric acid may be:
    (1) Made of unlined steel if the cargo composition is between 70 and 
80 or between 90 and 100 percent acid by weight;
    (2) Lined with lead if the cargo composition does not exceed 96 
percent acid by weight; or
    (3) Lined with natural rubber or neoprene if the cargo composition 
does not exceed 51 percent acid by weight.
    (c) A containment system for oleum may be of unlined steel if the 
concentration of free sulfur trioxide in the oleum exceeds 20 percent by 
weight.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983]



Sec.  153.557  Special requirements for hydrochloric acid.

    (a) A containment system that carries hydrochloric acid must be 
lined with:
    (1) Natural rubber;
    (2) Neoprene; or
    (3) A material approved for hydrochloric acid tanks by the 
Commandant (CG-ENG).
    (b) Containment systems for contaminated hydrochloric acid are 
approved by the Commandant (CG-ENG) on a case by case basis.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4781, Feb. 3, 1983]



Sec.  153.558  Special requirements for phosphoric acid.

    A phosphoric acid containment system must be:
    (a) Lined with natural rubber or neoprene;
    (b) Lined with a material approved for phosphoric acid tanks by the 
Commandant (CG-ENG); or
    (c) Made of a stainless steel that resists corrosion by phosphoric 
acid.

    Note: ``Phosphoric acid'', as defined in Sec.  153.2, includes 
phosphoric acid, superphosphoric acid, and aqueous solutions of 
phosphoric acid.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983; CGD 88-100, 54 FR 40042, Sept. 29, 1989]



Sec.  153.559  Special requirements for nitric acid (less than 70 percent).

    A containment system that carries nitric acid (less than 70 percent) 
must be of stainless steel that resists corrosion by nitric acid.



Sec.  153.560  Special requirements for Alkyl (C7-C9) nitrates.

    (a) The carriage temperature of octyl nitrates must be maintained 
below 100 [deg]C (212 [deg]F) in order to prevent the occurrence of a 
self-sustaining exothermic decomposition reaction.
    (b) Octyl nitrates may not be carried in a deck tank unless the tank 
has a combination of insulation and a water deluge system sufficient to 
maintain the tank's cargo temperature below 100 [deg]C (212 [deg]F) and 
the cargo temperature rise at below 1.5 [deg]C(2.7 [deg]F)/hour, for a 
fire of 650 [deg]C (1200 [deg]F).

[CGD 88-100, 54 FR 40042, Sept. 29, 1989, as amended by CGD 92-100, 59 
FR 17028, Apr. 11, 1994; CGD 94-900, 59 FR 45139, Aug. 31, 1994]



Sec.  153.565  Special requirement for temperature sensors.

    If a cargo listed in table 1 of this part refers to this section, 
temperature sensors must be used to monitor the cargo pump temperature 
to detect overheating due to pump failures, when carrying that cargo.

[CGD 94-900, 59 FR 45139, Aug. 31, 1994]

[[Page 246]]



Sec.  153.602  Special requirements for cargoes reactive with water.

    When Table 1 refers to this section, the air inlet to the pressure-
vacuum valve for the cargo tank must be located at least 2m (approx. 6.6 
ft) above the weatherdeck.

[CGD 78-128, 47 FR 21210, May 17, 1982]

                         Testing and Inspection



Sec.  153.806  Loading information.

    Each tankship must have a manual containing information that enables 
the master to load and ballast the tankship while keeping structural 
stresses within design limits.

[CGD 79-023, 48 FR 51009, Nov. 4, 1983]



Sec.  153.808  Examination required for a Certificate of Compliance.

    Before a vessel receives either an initial or a reissued Certificate 
of Compliance endorsed to carry a cargo from Table 1 of this part, the 
vessel must call at a U.S. port for an examination during which the 
Officer in Charge, Marine Inspection, determines whether or not the 
vessel meets the requirements of this chapter.

[CGD 81-052, 50 FR 8733, Mar. 5, 1985, as amended by CGD 95-027, 61 FR 
26009, May 23, 1996]



Sec.  153.809  Procedures for having the Coast Guard examine a 
vessel for a Certificate of Compliance.

    The owner of a foreign flag vessel wishing to have the Coast Guard 
conduct a Certificate of Compliance examination, as required by Sec.  
153.808, must proceed as follows:
    (a) Notify the Officer in Charge, Marine Inspection of the port 
where the vessel is to be inspected at least 7 days before the vessel 
arrives and arrange the exact time and other details of the examination. 
This notification is in addition to any other pre-arrival notice to the 
Coast Guard required by other regulations, but may be concurrent with 
the endorsement application in Sec.  153.9, and must include--
    (1) The name of the vessel's first U.S. port of call;
    (2) The date that the vessel is scheduled to arrive;
    (3) The name and telephone number of the owner's local agent; and
    (4) The names of all cargoes listed in table 1 of this part that are 
on board the vessel.
    (b) Before the examination required by Sec.  153.808 is begun, make 
certain that the following plans are on board the vessel and available 
to the Marine Inspector. These plans include--
    (1) A general arrangement (including the location of fire fighting, 
safety, and lifesaving gear);
    (2) A capacity plan;
    (3) A schematic diagram of cargo piping on deck and in tanks 
(including the location of all valves and pumps); and
    (4) A schematic diagram of cargo tank vent piping (including the 
location of relief valves and flame screens).

[CGD 95-027, 61 FR 26009, May 23, 1996]



Sec.  153.812  Inspection for Certificate of Inspection.

    The rules governing the issuance of Certificates of Inspection are 
contained in part 31 of this chapter.



                          Subpart C_Operations

                     Documents and Cargo Information



Sec.  153.900  Certificates and authorization to carry a bulk liquid
hazardous material.

    (a) Except as allowed in 33 CFR 151.33(a), no ship may carry a cargo 
of bulk liquid hazardous material or an NLS residue if the bulk liquid 
hazardous material or NLS is listed in Table 1 or carried under a 
written permission under paragraph (d) of this section unless the ship 
meets the following:
    (1) The cargo must be carried in a cargo tank.
    (2) If a United States ship, the ship must have a Subchapter D or I 
Certificate of Inspection that is endorsed to allow the cargo tank to 
carry the cargo.
    (3) If a foreign ship, the ship must have a Certificate of 
Compliance that is endorsed to allow the cargo tank to carry the cargo.
    (4) The ship must have an IMO Certificate of Fitness issued under 
Sec.  153.12 that is endorsed to allow the cargo tank to carry the cargo 
if it is--

[[Page 247]]

    (i) A United States self-propelled ship in foreign waters; or
    (ii) A United States non-self-propelled ship in the waters of 
another Administration signatory to MARPOL 73/78 and the cargo is a 
Category A, B, or C NLS.
    (b) [Reserved]
    (c) No ship may carry any bulk liquid cargo not listed in Sec.  
30.25-1 of this chapter, Table 151.05 of Part 151 of this chapter, Table 
1 or Table 2 of this part, Table 4 of Part 154 of this chapter, 33 CFR 
151.47, or 33 CFR 151.49 unless the cargo name is endorsed on the 
Certificate of Inspection or contained in a letter issued under 
paragraph (d) of this section.
    (d) The Coast Guard at its discretion endorses the Certificate of 
Inspection with the name of or issues a letter allowing the carriage of 
an unlisted cargo described under paragraph (c) of this section if--
    (1) The shipowner--
    (i) Requests the Coast Guard to add the cargo; and
    (ii) Supplies any information the Coast Guard needs to develop 
carriage requirements for the bulk liquid cargo; and
    (2) The ship--
    (i) Has a Certificate of Inspection, Certificate of Compliance, or 
IOPP Certificate as specified in this part;
    (ii) Meets the design and equipment requirements of this part 
specified by the Coast Guard; and
    (iii) Meets any additional requirements made by the Coast Guard.

[CGD 81-101, 52 FR 7783, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.901  Documents: Posting, availability, and alteration.

    (a) No person may operate a United States ship unless the endorsed 
Certificate of Inspection is readily available on the ship.
    (b) No person may operate a foreign ship unless the endorsed 
Certificate of Compliance or Certificate of Inspection is readily 
available on the ship.
    (c) No person may operate a ship under an alternative or waiver 
granted under this part unless the document granting the alternative or 
waiver is attached to the ship's Certificate of Inspection or 
Certificate of Compliance.
    (d) Except as allowed in paragraph (e) of this section, the Coast 
Guard does not accept the following if altered:
    (1) Certificates of Inspection.
    (2) Certificates of Compliance.
    (3) Certificates of Fitness, unless the alteration is by the issuing 
authority.
    (4) Approved Procedures and Arrangements Manuals, unless the 
alteration is approved by the issuing authority.
    (5) NLS Certificates.
    (e) A person wishing to change a Procedures and Arrangements Manual 
approved by the Coast Guard must submit a copy to the Coast Guard 
following the procedures for requesting an endorsed Certificate of 
Inspection in Sec.  153.8.

[CGD 81-101, 52 FR 7783, Mar. 12, 1987]



Sec.  153.902  Expiration and invalidation of the Certificate of
Compliance.

    (a) The Certificate of Compliance shows its expiration date.
    (b) The endorsement of a Certificate of Compliance under this part 
is invalid if the vessel does not have a valid IMO Certificate of 
Fitness.
    (c) The endorsement on a Certificate of Compliance invalidated under 
paragraph (b) of this section, becomes valid again once the ship has the 
IMO Certificate of Fitness revalidated or reissued.

    Note: See Sec.  153.809 for procedures for having a Certificate of 
Compliance reissued.

[CGD 81-101, 52 FR 7784, Mar. 12, 1987; CGD 95-072, 60 FR 50465, Sept. 
29, 1995; 60 FR 54106, Oct. 19, 1995; CGD 95-027, 61 FR 26009, May 23, 
1996]



Sec.  153.903  Operating a United States ship in special areas:
Categories A, B, and C.

    No person may operate a United States ship that carries an NLS or 
NLS residue in a special area unless--
    (a) The ship's Certificate of Inspection is endorsed in accordance 
with Sec.  153.30; and
    (b) The ship meets the operating requirements applying to special 
areas in Regulations 5, 5A, 8 and the Standards

[[Page 248]]

for Procedures and Arrangements of Annex II.

[CGD 81-101, 52 FR 7784, Mar. 12, 1987]



Sec.  153.904  Limitations in the endorsement.

    No person may operate a tankship unless that person complies with 
all limitations in the endorsement on the tankship's Certificate of 
Inspection or Certificate of Compliance.

[CGD 81-052, 50 FR 8734, Mar. 5, 1985]



Sec.  153.905  Regulations required to be on board.

    No person may operate a tankship unless the most recent editions of 
this part, and parts 35 and 150 of this chapter are on board.

[CGD 78-128, 47 FR 21210, May 17, 1982]



Sec.  153.907  Cargo information.

    (a) The master shall ensure that the following information for each 
cargo carried under this part is readily available to those on the 
tankship engaged in cargo operations:
    (1) The name of the cargo as listed in table 1.
    (2) A description of the cargo's appearance and color.
    (3) Hazards in handling the cargo.
    (4) Any special handling procedures for the cargo, such as inerting.
    (5) Procedures to follow if the cargo spills or leaks.
    (6) Procedures for treating a person exposed to the cargo.
    (7) A list of fire fighting procedures and extinguishing agents 
effective with cargo fires.
    (8) Shipper's name.
    (9) Loading point.
    (10) Approximate quantity of cargo.
    (11) Tank in which the cargo is located.
    (12) The name of an agent in the United States authorized to accept 
service of legal process for the vessel.
    (b) The master shall make sure that the following information for 
cargoes other than those carried under this part is readily available on 
the tankship:
    (1) The name of the cargo as listed in Table 4 of Part 154 of this 
chapter or Sec.  30.25-1 of this chapter if the cargo is listed in one 
of these two tables.
    (2) The name of the cargo prescribed in the letter authorizing 
carriage of the cargo under Sec.  153.900(d) if the cargo is a hazardous 
or flammable cargo authorized for carriage under that section.
    (3) The shipper's name for the cargo and the name of the shipper if 
the cargo is neither a hazardous nor flammable cargo.

[CGD 81-078, 50 FR 21174, May 22, 1985, as amended by CGD 88-100, 54 FR 
40042, Sept. 29, 1989]



Sec.  153.908  Cargo viscosity and melting point information; measuring
cargo temperature during discharge: Categories A, B, and C.

    (a) The person in charge of the ship may not accept a shipment of a 
Category A, B, or C NLS cargo having a reference to this paragraph in 
the ``Special Requirements'' column of Table 1 unless the person has, 
from the cargo's manufacturer or the person listed as the shipper on the 
bill of lading, a written statement of the following:
    (1) For Category A or B NLS, the cargo's viscosity at 20 [deg]C in 
mPa.s and, if the cargo's viscosity exceeds 25 mPa.s at 20 [deg]C, the 
temperature at which the viscosity is 25 mPa.s.
    (2) For Category C NLS, the cargo's viscosity at 20 [deg]C in mPa.s 
and, if the cargo's viscosity exceeds 60 mPa.s at 20 [deg]C, the 
temperature at which the viscosity is 60 mPa.s. If the cargo's viscosity 
varies from shipment to shipment, the maximum viscosity and maximum 
temperature values may be supplied.
    (b) The person in charge of the ship may not accept a shipment of a 
Category A, B, or C cargo having a reference to this paragraph in the 
``Special Requirements'' column of Table 1 unless the person has a 
written statement of the cargo's melting point in [deg]C from the 
cargo's manufacturer or the person listed as the shipper on the bill of 
lading. If the cargo's melting point varies from shipment to shipment, 
the highest melting point may be supplied.
    (c) The person in charge of the ship shall ensure that the cargo 
temperature is read and recorded in the Cargo Record Book following the 
procedures in paragraph (d) of this section when a

[[Page 249]]

cargo having a reference to paragraph (a) or (b) of this section in the 
``Special Requirements'' column of Table 1 is unloaded.
    (d) The cargo temperature measured in paragraph (c) of this section 
must be made using the following procedure:
    (1) Each reading must be made with the sensor or thermometer 
required by Sec.  153.440(a)(3) or (c). If a portable thermometer is 
used, it must be located as prescribed for the temperature sensor in 
Sec.  153.440(a)(3).
    (2) A total of 2 readings must be made, the first reading to be made 
no more than 30 minutes after cargo transfer begins and the second 
reading no more than 30 minutes before the main cargo pump is shut down.
    (3) The cargo's temperature is the average of the 2 readings made 
under paragraph (d)(2) of this section.

[CGD 81-101, 52 FR 7784, Mar. 12, 1987]



Sec.  153.909  Completing the Cargo Record Book and record retention:
Categories A, B, C, and D.

    (a) The person in charge of a ship shall ensure that the Cargo 
Record Book required under Sec.  153.490 is completed immediately after 
any of the following occurs:
    (1) An NLS cargo is loaded.
    (2) An NLS cargo is transferred between tanks on a ship.
    (3) An NLS cargo is unloaded from a tank.
    (4) A tank that last carried an NLS cargo is prewashed under this 
part.
    (5) A tank that last carried an NLS cargo is washed, except as 
reported under paragraph (a)(4) of this section, cleaned, or ventilated.
    (6) Washings from a tank that last carried an NLS cargo are 
discharged to the sea.
    (7) Tanks that last carried an NLS cargo are ballasted.
    (8) Ballast water is discharged to the sea from a cargo tank that 
last carried an NLS.
    (9) An NLS cargo or NLS residue is discharged to the sea by accident 
or except as allowed by this part.
    (10) A Surveyor is present during an operation that this part 
requires the presence of a Surveyor.
    (11) NLS residue or NLS cargo is transferred from cargo pumproom 
bilges or transferred to an incinerator.
    (12) A waiver is issued to the ship, ship owner, ship operator, or 
person in charge of the ship under this part.
    (13) The concentration of a Category A NLS residue is measured under 
Sec.  153.1120(a).
    (14) Any discharge recording equipment required by Sec.  
153.481(b)(2) fails.
    (b) The person in charge of the ship shall ensure that the Cargo 
Record Book is on board and readily available for inspection and copying 
by the Coast Guard and when the ship is a U.S. ship in the waters of a 
foreign country whose Administration is signatory to MARPOL 73/78, the 
authorities of that country.
    (c) Each officer in charge of an operation listed under paragraph 
(a) of this section, and each Surveyor observing an operation that this 
part requires the presence of a Surveyor, shall attest to the accuracy 
and completeness of each Cargo Record Book entry concerning those 
operations by signing after each entry.
    (d) After all the entries on a page of the Cargo Record Book are 
completed, and if the person in charge of the ship agrees with the 
entries, the person in charge of the ship shall sign the bottom of that 
page.
    (e) The ship owner or operator shall ensure that--
    (1) Each Cargo Record Book is retained on board the ship for at 
least 3 years after the last entry; and
    (2) Each discharge recording required by Sec.  153.1126(b)(1) is 
retained on board the ship for at least three years.

[CGD 81-101, 52 FR 7784, Mar. 12, 1987]



Sec.  153.910  Cargo piping plan.

    No person may operate a tankship unless the tankship has a cargo 
piping plan that:
    (a) Shows all cargo piping on the tankship;
    (b) Shows all cargo valving, pumps, and other equipment that is used 
during cargo transfer;
    (c) Shows the cargo tanks;
    (d) Shows any modifications necessary to a containment system that 
is to be separated as prescribed under

[[Page 250]]

Part 150 of this subchapter, or Sec. Sec.  153.525 and 153.1020;
    (e) Emphasizes the piping and equipment described in paragraphs (a), 
(b) and (d) of this section by using contrasting colors, line widths, or 
similar methods; and
    (f) Shows the cargo loading rates chosen under Sec.  153.365(b) for 
all applicable cargo lines.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21210, May 17, 1982]



Sec.  153.912  Certificate of inhibition or stabilization.

    (a) When a cargo in Table 1 is referred to this section, no person 
may operate a tankship carrying the cargo without a written 
certification, carried on the bridge of the tankship, from the shipper 
that the cargo is:
    (1) Inhibited; or
    (2) Stabilized.
    (b) The certification required by this section must contain the 
following information:
    (1) Whether the cargo is inhibited or stabilized.
    (2) The name and concentration of the inhibitor or stabilizer.
    (3) The date the inhibitor or stabilizer was added.
    (4) The length of time the inhibitor or stabilizer is effective.
    (5) Any temperature limitations qualifying the inhibitor's or 
stabilizer's effective lifetime.
    (6) The action to be taken should the duration of the voyage exceed 
the inhibitor's or stabilizer's useful life.

                 General Cargo Operational Requirements



Sec.  153.920  Cargo quantity limitations.

    (a) No person may load a cargo tank or operate a tankship that 
carries a cargo tank containing in excess of 1250 m\3\ (approx. 44,138 
ft\3\) of cargo requiring a type I containment system.
    (b) No person may load a cargo tank or operate a tankship that 
carries a cargo tank containing in excess of 3000 m\3\ (approx. 105,932 
ft\3\) of a cargo requiring a type II containment system.



Sec.  153.921  Explosives.

    No person may load, off-load, or carry a cargo listed in this part 
on board a vessel that carries explosives unless he has the prior 
written permission of the Commandant (CG-ENG).

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983]



Sec.  153.923  Inerting systems.

    The master shall ensure that the inert gas systems for any cargo 
that this part requires to be inerted are operating correctly.

                          General Vessel Safety



Sec.  153.930  Cargo antidotes.

    No person may operate a tankship that carries a cargo listed in 
Table 1 unless the tankship has on board the antidotes described for the 
cargo in the Medical First Aid Guide for Use in Accidents Involving 
Dangerous Goods, published by IMO.



Sec.  153.931  Obstruction of pumproom ladderways.

    The master shall ensure that all cargo pumproom ladderways are 
unobstructed at all times.



Sec.  153.932  Goggles and protective clothing.

    (a) The master shall ensure that each person wear a face mask or 
tight-fitting goggles for eye protection against splashing or spraying 
liquids if that person is:
    (1) Sampling cargo;
    (2) Transferring cargo;
    (3) Making or breaking a cargo hose connection;
    (4) Gauging a cargo tank; or
    (5) Opening a cargo tank by opening a Butterworth hatch, ullage 
hatch, cargo tank hatch, or similar opening.
    (b) The master shall ensure that each person wear a face mask or 
tight-fitting goggles for eye protection against splashing or spraying 
liquids if the person is:
    (1) In the area of the deck where the cargo tanks, cargo piping, and 
cargo pumprooms are located while a cargo transfer is taking place; or
    (2) In a cargo pumproom, an enclosed space adjacent to a cargo tank, 
or a

[[Page 251]]

space containing part of a cargo containment system.
    (c) The master shall ensure that each person in paragraphs (a) and 
(b) of this section wear any additional protective clothing the master 
believes necessary to protect the person from the cargo's hazards.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21210, May 17, 1982]



Sec.  153.933  Chemical protective clothing.

    When table 1 refers to this section, the following apply:
    (a) The master shall ensure that the following chemical protective 
clothing constructed of materials resistant to permeation by the cargo 
being handled is worn by all personnel engaged in an operation listed in 
paragraph (b) of this section:
    (1) Splash protective eyewear.
    (2) Long-sleeved gloves.
    (3) Boots or shoe covers.
    (4) Coveralls or lab aprons.

    Note: ``Guidelines for the Selection of Chemical Protective 
Clothing'', Third Edition, 1987, available from the American Conference 
of Governmental Industrial Hygienists, 1330 Kemper Meadow Drive, 
Cincinnati, OH 45240-1634, provides information on the proper clothing 
for the cargo being handled.

    (b) This section applies during the following operations:
    (1) Sampling cargo.
    (2) Transferring cargo.
    (3) Making or breaking cargo hose connections.
    (4) Gauging a cargo tank, unless gauging is by closed system.
    (5) Opening cargo tanks.
    (c) Coveralls or lab aprons may be replaced by splash suits or 
aprons constructed of light weight or disposable materials if, in the 
judgment of the master--
    (1) Contact with the cargo being handled is likely to occur only 
infrequently and accidentally; and
    (2) The splash suit or apron is disposed of immediately after 
contamination.
    (d) Splash protective eyewear must be tight-fitting chemical-splash 
goggles, face shields, or similar items intended specifically for eye 
protection from chemical splashing or spraying.
    (e) The master shall ensure that each person in the vicinity of an 
operation listed in paragraph (b) of this section or in the vicinity of 
tanks, piping, or pumps being used to transfer the cargo wears splash 
protective eyewear under paragraph (d) of this section.

[CGD 88-100, 54 FR 40042, Sept. 29, 1989, as amended by USCG-1999-6216, 
64 FR 53227, Oct. 1, 1999]



Sec.  153.934  Entry into spaces containing cargo vapor.

    (a) No person may enter a cargo tank, cargo handling space, pumproom 
or enclosed space in the cargo area without the permission of the 
master.
    (b) Before permitting anyone to enter a cargo tank, cargo handling 
space, pumproom or other enclosed space in the cargo area, the master 
shall make sure that:
    (1) The space is free of toxic vapors and has sufficient oxygen to 
support life; or
    (2) Those entering the space wear protective equipment with self-
contained breathing apparatus as described in Sec.  153.214(b) and an 
officer closely supervises the entire operation.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21210, May 17, 1982]



Sec.  153.935  Opening of tanks and cargo sampling.

    (a) Except as provided in paragraph (b) of this section, the master 
shall ensure that all cargo tank hatches, ullage openings, and tank 
cleaning openings are tightly closed at all times.
    (b) The master may not authorize the opening of a cargo tank, 
except:
    (1) To clean a tank;
    (2) To transfer a cargo that Table 1 allows in a containment system 
having an open gauging system;
    (3) To sample a cargo that Table 1 allows in a containment system 
having an open gauging system; or
    (4) To sample a cargo that Table 1 allows in a containment system 
having a restricted gauging system if:
    (i) The tank is not being filled during sampling;
    (ii) The vent system has relieved any pressure in the tank;

[[Page 252]]

    (iii) The person sampling the cargo wears the protective clothing 
required during cargo transfer; and
    (iv) The tank is closed tightly following sampling.
    (c) The master shall make sure that cargoes requiring closed gauging 
are sampled only through the controlled sampling arrangement required by 
Sec.  153.404(d).

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21210, May 17, 1982]



Sec.  153.935a  Storage of cargo samples.

    (a) The master shall make sure that any cargo samples are stored in:
    (1) A designated and ventilated space in the cargo area of the 
vessel; or
    (2) An area approved by the Commandant (CG-ENG) or the tankship's 
flag administration for the stowage of cargo samples.
    (b) The master shall make sure that cargo sample bottles are stored:
    (1) In a way that prevents shifting of the sample bottles when the 
vessel is at sea;
    (2) In bins or containers constructed of materials that are 
resistant to the cargo samples; and
    (3) Apart from other sample bottles containing incompatible liquids 
(See part 150, subpart A).

[CGD 78-128, 47 FR 21211, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  153.936  Illness, alcohol, drugs.

    The master shall ensure that no person participates in cargo related 
operations who appears to be intoxicated by alcohol or drugs or to be so 
ill as to be unfit for the particular operation.

                     Marking of Cargo Transfer Hose



Sec.  153.940  Standards for marking of cargo hose.

    No person may mark a hose assembly as meeting the standards of this 
section unless the hose assembly meets the following requirements:
    (a) Each hose assembly must have:
    (1) Fully threaded connections;
    (2) Flanges that meet ANSI B16.5, B16.24, or B16.31; or
    (3) Class 1 quick-disconnect couplings that comply with ASTM F 1122 
(incorporated by reference, see Sec.  153.4), and are marked ``C1-1.''
    (b) Each hose assembly must be marked with the:
    (1) Date of manufacture;
    (2) Working pressure described in paragraph (d) of this section;
    (3) Date of the last test made as prescribed in paragraph (e) of 
this section; and
    (4) Manufacturer's recommended maximum and minimum temperatures.
    (c) A cargo hose assembly must have a minimum bursting pressure as 
stated by the manufacturer of at least 5152 kPa gauge (approx. 750 
psig).
    (d) The working pressure marked on a hose must meet the following:
    (1) Be at least 1030 kPa gauge (approx. 150 psig).
    (2) Not exceeded 20 per cent (one-fifth) of the manufacturer's 
stated bursting pressure.
    (3) Not exceed the manufacturer's recommended working pressure.
    (4) Not exceed the test pressure used in the latest test under 
paragraph (e)(3) of this section.
    (e) A cargo hose assembly must be inspected and tested by placing it 
in a straight, horizontal position so that its entire external surface 
is accessible. It must be ascertained that the hose assembly:
    (1) Has no loose covers, kinks, bulges, soft spots, and no gouges, 
cuts, or slashes that penetrate any hose reinforcement;
    (2) Has no external and, to the extent internal inspection is 
possible with both ends of the hose open, no internal deterioration; and
    (3) Does not burst, bulge, leak, or abnormally distort under static 
liquid pressure at least as great as the recommended working pressure.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21211, May 17, 1982; CGD 88-032, 56 FR 35827, July 29, 1991; USCG-2000-
7790, 65 FR 58463, Sept. 29, 2000; USCG-2014-0688, 79 FR 58284, Sept. 
29, 2014]

                        Cargo Transfer Procedures



Sec.  153.953  Signals during cargo transfer.

    The master shall ensure that:
    (a) The tankship displays a red flag in the day and a red light at 
night

[[Page 253]]

when transferring cargo while fast to a dock;
    (b) The tankship displays a red flag when transferring cargo while 
at anchor; and
    (c) The red flag or the red light is visible from all sides of the 
tankship.



Sec.  153.955  Warning signs during cargo transfer.

    (a) When transferring cargo while fast to a dock or at anchor in 
port, the master shall ensure that the tankship displays a warning sign 
at the gangway facing the shore so that it may be seen from the shore 
and another warning sign facing outboard toward the water so that it may 
be seen from the water. (See figure 1).
    (b) Except as provided in paragraph (f) of this section, each 
warning sign must have the following legends:
    (1) Warning.
    (2) Dangerous Cargo.
    (3) No Visitors.
    (4) No Smoking.
    (5) No Open Lights.
    (c) Each letter must be block style, black on a white background.
    (d) Each letter must:
    (1) Be 7.5 cm (approx. 3 in.) high;
    (2) Be 5 cm (approx. 2 in.) wide except for ``M'' and ``W'' which 
must be 7.5 cm (approx. 3 in.) wide and the letter ``I'' which may be 
1.3 cm (approx. \1/2\ in.) wide; and
[GRAPHIC] [TIFF OMITTED] TC02FE91.082

    (3) Have 1.3 cm (approx. \1/2\ in.) stroke width.
    (e) The spacing must be:
    (1) 1.3 cm (approx. \1/2\ in.) between letters of the same word;
    (2) 5 cm (approx. 2 in.) between words;
    (3) 5 cm (approx. 2 in.) between lines; and
    (4) 5 cm (approx. 2 in.) at the borders of the sign.
    (f) Except as described in Sec.  153.1045, the legends ``No 
Smoking'' and ``No Open Lights'' are not required when the cargoes on 
board the tankship are neither flammable nor combustible.



Sec.  153.957  Persons in charge of transferring liquid cargo in bulk
or cleaning cargo tanks.

    (a) The owner and operator of the vessel, and his or her agent, and 
each of them, shall ensure that--
    (1) Enough ``Tankerman-PICs'' or restricted ``Tankerman-PICs'', and 
``Tankerman-Assistants'', authorized for the classification of cargo 
carried, are on duty to safely transfer liquid cargo in bulk or to 
safely clean cargo tanks;
    (2) Each transfer of liquid cargo in bulk and each cleaning of a 
cargo tank is supervised by a qualified person designated as a person in 
charge of the

[[Page 254]]

transfer or the cleaning under Subpart C of 33 CFR part 155;
    (3) When cargo regulated under this part is due for transfer, the 
person in charge of the transfer has received special training in the 
particular hazards associated with the cargo and in all special 
procedures for its handling; and
    (4) On each foreign vessel, the person in charge understands his or 
her responsibilities as described in this subchapter.
    (b) Upon request by the Officer in Charge, Marine Inspection, in 
whose zone the transfer will take place, the owner and operator of the 
vessel, and his or her agent, and each of them, shall provide 
documentary evidence that the person in charge has received the training 
specified by paragraph (a)(3) of this section and is capable of 
competently performing the procedures necessary for the cargo.

[CGD 79-116, 60 FR 17158, Apr. 4, 1995]



Sec.  153.959  Approval to begin transfer operations required.

    No person may make connections for cargo transfer or transfer cargo 
unless he has authorization from the person in charge of cargo transfer.



Sec.  153.964  Discharge by gas pressurization.

    The person in charge of cargo transfer may not authorize cargo 
discharge by gas pressurization unless:
    (a) The tank to be offloaded has an SR or PV venting system;
    (b) The pressurization medium is either the cargo vapor or a 
nonflammable, nontoxic gas inert to the cargo; and
    (c) The pressurizing line has:
    (1) A pressure reducing valve whose setting does not exceed 90% of 
the tank's relief valve setting and a manual control valve between the 
pressure reducing valve and the tank; or
    (2) For an inert gas medium:
    (i) A safety relief valve with a cross sectional flow area at least 
equal to that of the pressurizing line and whose relieving pressure does 
not exceed 90 percent of the tank's relief valve setting;
    (ii) A manual control valve between the safety relief valve and the 
tank; and
    (iii) A check valve between the manual control valve and the tank.



Sec.  153.966  Discharge by liquid displacement.

    The person in charge of cargo transfer may not authorize cargo 
discharge by liquid displacement unless the liquid supply line to the 
tank has:
    (a) A safety relief or pressure reducing valve set to operate at no 
more than 80 percent of the tank's relief valve setting; and
    (b) A manual control valve between the tank and the supply line's 
safety relief valve or pressure reducing valve.



Sec.  153.968  Cargo transfer conference.

    (a) Before he may begin making connections for cargo transfer, the 
person in charge of cargo transfer shall confer with the person 
supervising the cargo transfer at the facility.
    (b) The person in charge of cargo transfer shall discuss the 
important aspects of the transfer operation, such as the following, with 
the supervisor at the facility:
    (1) The products to be transferred.
    (2) The cargo loading rates marked on the cargo piping plan or the 
maximum safe transfer rates.
    (3) The critical or hazardous stages of the transfer operation.
    (4) The emergency procedures in case of a spill.
    (5) If the vessel is equipped with the tank overflow alarm 
prescribed in Sec.  153.408(c), a procedure for shutdown of shore pumps, 
shore valves, and ship's valves that prevents piping system pressures 
from exceeding those for which the piping system is designed.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21211, May 17, 1982; CGD 81-078, 50 FR 21174, May 22, 1985]



Sec.  153.970  Cargo transfer piping.

    The person in charge of cargo transfer shall ensure that:
    (a) Cargo is transferred to or from a cargo tank only through the 
tankship's cargo piping system;
    (b) Vapor not returned to shore through the tankship's vapor return 
system is discharged at the height required for the cargo's vent riser 
in Table 1, and

[[Page 255]]

    (c) All cargo vapor is returned to shore through the valved 
connection on the venting system if:
    (1) The cargo requires closed gauging, is referenced to Sec.  
153.372 or is referenced to Sec.  153.525;
    (2) The transfer terminal has vapor return equipment; and
    (3) In his estimation the vapor return equipment is adequate to 
handle the vapor expected from the tank.



Sec.  153.972  Connecting a cargo hose.

    The person in charge of cargo transfer may not authorize the 
connection of a hose to a cargo containment system unless:
    (a) He has ensured himself that the cargo will not weaken or damage 
the hose;
    (b) The hose is marked as meeting the standards of Sec.  153.940;
    (c) The date of the hose's last pressure test is within one year of 
the date on which the hose is used to transfer cargo;
    (d) The recommended working pressure marked on a hose used for 
discharge meets or exceeds the working pressure marked on the cargo 
piping at the hose connection; and
    (e) The cargo's temperature is within the manufacturer's recommended 
maximum and minimum hose temperatures.



Sec.  153.975  Preparation for cargo transfer.

    The person in charge of cargo transfer may not approve or continue 
cargo transfer unless the following conditions are met:
    (a) No fires or open flames are on deck or in compartments near the 
hose connections when Table 1 requires the cargo's containment system to 
have a fire protection system.
    (b) Any electrical bonding of the tankship to the transfer facility 
is made before the cargo transfer piping is joined.
    (c) Any supplemental inert gas supply necessary to maintain the 3.5 
kPa gauge (approx. 0.5 psig) pressure in the tank during offloading (see 
Sec.  153.500) is connected to the inert gas pressure control system.
    (d) The transfer connections have enough slack to allow for vessel 
movement.
    (e) The transfer connections are supported by tackles.
    (f) The cargo high level alarms, tank overflow alarms and overflow 
control systems are functioning correctly when the cargo is loaded.
    (g) Joints and couplings are gasketed and mated tightly.
    (h) Flanges are bolted tightly.
    (i) No repair work is underway in areas where cargo or cargo vapors 
may collect.
    (j) Cargo and sea valves are properly set, with those sea valves 
connected to cargo piping lashed or sealed shut.
    (k) Venting system bypass valves are set for cargo transfer and are 
operating properly.
    (l) All scuppers are plugged.
    (m) Smoking is limited to safe places.
    (n) Fire fighting and safety equipment is ready.
    (o) He is in effective communication with the transfer terminal.
    (p) The person in charge of the transfer terminal has acknowledged 
that he is ready to transfer.
    (q) Pressures within the cargo transfer and containment systems do 
not exceed the pressure ranges for which the transfer hose and 
containment systems are designed.
    (r) No vessels that would hazard cargo transfer are alongside the 
tankship.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21211, May 17, 1982]



Sec.  153.976  Transfer of packaged cargo or ship's stores.

    The person in charge of cargo transfer may neither begin nor 
continue the transfer of a flammable or combustible cargo while packaged 
cargo or ship's stores are transferred unless transfer of the packaged 
cargo or ship's stores does not hazard transfer of the flammable or 
combustible cargo.



Sec.  153.977  Supervision of cargo transfer.

    The person in charge of cargo transfer shall:

[[Page 256]]

    (a) Supervise the operation of cargo system valves;
    (b) Monitor the cargo loading rate to ensure it does not exceed that 
stated on the cargo piping plan; and
    (c) Monitor the cargo level in the tanks to make sure they do not 
overflow.

[CGD 78-128, 47 FR 21211, May 17, 1982]



Sec.  153.979  Gauging with a sounding tube.

    (a) No person may remove the cover of a sounding tube unless he has 
authorization from the person in charge of cargo transfer.
    (b) The person in charge of cargo transfer may not authorize removal 
of the cover from a sounding tube gauge unless all tank pressure has 
been relieved through the tank's venting system.



Sec.  153.980  Isolation of automatic closing valves.

    The person in charge of cargo transfer may isolate automatic closing 
valves described in Sec.  153.408(b) from a cargo containment system if 
the following conditions are met:
    (a) The containment system carries products to which Sec.  153.408 
does not apply.
    (b) The valves are isolated by:
    (1) Removing the valves; or
    (2) Installing removable pipes and blind flanges to by-pass the 
valves.

[CGD 78-128, 47 FR 21211, May 17, 1982]



Sec.  153.981  Leaving room in tank for cargo expansion.

    The person in charge of cargo transfer shall ensure that the amount 
of cargo in a tank does not exceed the tank's capacity at any ambient 
temperature between -18 [deg]C (approx. 0 [deg]F) and 46 [deg]C (approx. 
115 [deg]F).



Sec.  153.983  Termination procedures.

    Upon completion of the transfer operation, the person in charge of 
cargo transfer shall ensure that:
    (a) The cargo transfer connections are closed off;
    (b) The transfer lines and hoses are drained of cargo, either into 
the tank or back to the transfer terminal;
    (c) Any electrical bonding between the vessel and the shore facility 
is broken only after the cargo hose is disconnected and all spills 
removed; and
    (d) Each vent system is returned to its nonloading configuration.

                        Special Cargo Procedures



Sec.  153.1000  Special operating requirements for cargoes reactive 
with water.

    When Table 1 refers to this section, the master must ensure that the 
cargo:
    (a) Is carried only in a containment system completely isolated from 
any systems containing water, such as slop tanks, ballast tanks, cargo 
tanks containing slops or ballast, their vent lines or piping; and
    (b) Is separated by double walls, such as cofferdams and piping 
tunnels, from any system containing water, as for example those 
described in paragraph (a) of this section.



Sec.  153.1002  Special operating requirements for heat sensitive
cargoes.

    When Table 1 refers to this section, the master shall make sure 
that:
    (a) The cargo temperature is maintained below the temperature that 
would induce polymerization, decomposition, thermal instability, 
evolution of gas or reaction of the cargo;
    (b) Any heating coils in the cargo tank are blanked off; and
    (c) The cargo is not carried in uninsulated deck tanks.

[CGD 78-128, 47 FR 21211, May 17, 1982]



Sec.  153.1003  Prohibited carriage in deck tanks.

    When Table 1 refers to this section, cargoes may not be carried in 
deck tanks.

[CGD 95-900, 60 FR 34050, June 29, 1995]



Sec.  153.1004  Inhibited and stabilized cargoes.

    (a) Before loading a cargo containment system with a cargo 
referenced to this section in Table 1, the person in charge of cargo 
transfer shall make sure that the cargo containment system is free of 
contaminants that could:
    (1) Catalyze the polymerization or decomposition of the cargo; or

[[Page 257]]

    (2) Degrade the effectiveness of the inhibitor or stabilizer.
    (b) The master shall make sure that the cargo is maintained at a 
temperature which will prevent crystallization or solidification of the 
cargo.

[CGD 78-128, 47 FR 21211, May 17, 1982]



Sec.  153.1010  Alkylene oxides.

    (a) Before each loading of a cargo containment system with a cargo 
referenced to this section in Table 1, the person in charge of cargo 
transfer shall:
    (1) Unless the tankship is equipped with independent cargo piping 
that meets paragraph (d) of this section:
    (i) Obtain verification from a Coast Guard Marine Inspector or from 
a representative of the tankship's flag administration that separation 
of the alkylene oxide piping system complies with alkylene oxide 
handling plans approved by the Coast Guard or the tankship's flag 
administration; and
    (ii) Make sure that each spectacle flange and blank flange 
connection that is required to separate alkylene oxide piping systems 
from other systems has a wire and seal attached by a Coast Guard Marine 
Inspector or a representative of the tankship's flag administration.
    (2) Purge the containment system until the oxygen content of the 
cargo tank is less than 2% by volume.
    (b) The person in charge of an alkylene oxide cargo transfer shall 
ensure that:
    (1) No alkylene oxide vapor or liquid is released to the atmosphere 
during cargo transfer;
    (2) No vapor return system connected to an alkylene oxide 
containment system is at the same time connected to another containment 
system;
    (3) Alkylene oxide is discharged only by an intank cargo pump or 
inert gas displacement;
    (4) Transfer hose is approved by the Commandant (CG-ENG) under Sec.  
153.530(o) for alkylene oxide transfer and is marked ``For Alkylene 
Oxide Transfer Only''; and
    (5) A water hose is laid out on deck with water pressure to the 
nozzle, and all alkylene oxide spillages are washed away immediately.
    (c) While alkylene oxides are onboard the vessel, the master shall 
make sure that the oxygen content of the vapor space above the alkylene 
oxide and those spaces specified in Sec.  153.530 (k) and (l) is 
maintained below 2% by volume.
    (d) Tankships with independent piping for alkylene oxides must have 
onboard:
    (1) Alkylene oxide handling plans approved by the Coast Guard or the 
tankship's flag administration; and
    (2) Certification from the Coast Guard or the tankship's flag 
administration that the cargo piping for alkylene oxides is independent.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21211, May 17, 1982; CGD 82-063b, 48 FR 4782, Feb. 3, 1983]



Sec.  153.1011  Changing containment systems and hoses to and from
alkylene oxide service.

    (a) The person in charge of cargo transfer shall make sure that:
    (1) No alkylene oxide is loaded into a containment system that last 
carried a cargo other than an alkylene oxide unless the containment 
system has been cleaned and inspected to make sure it is in good 
condition with no heavy rust accumulations or traces of previous 
cargoes;
    (2) No alkylene oxide is loaded into a containment system that 
within the previous three loadings carried a cargo listed in paragraph 
(b) of this section unless the containment system has been cleaned to 
the satisfaction of a Coast Guard Marine Inspector or a person 
specifically authorized by the Commandant (CG-ENG) to approve alkylene 
oxide tank cleaning;
    (3) No cargo but an alkylene oxide is loaded into a containment 
system which last carried an alkylene oxide unless the containment 
system has been cleaned of alkylene oxide to the satisfaction of a Coast 
Guard Marine Inspector or person specifically authorized by the 
Commandant (CG-ENG) to approve alkylene oxide tank cleaning; and
    (4) No hose marked ``For Alkylene Oxide Transfer Only'' is used for 
the transfer of a cargo other than an alkylene oxide.

[[Page 258]]

    (b) The following cargoes are particularly reactive with alkylene 
oxides:
    (1) Non-oxidizing mineral acids (e.g. hydrochloric, phosphoric);
    (2) Sulfuric acid;
    (3) Nitric acid;
    (4) Organic acids (e.g. acetic, formic);
    (5) Halogenated organic acids (e.g. chloroacetic);
    (6) Sulfonic acids (e.g. alkyl benzene sulfonic);
    (7) Caustic alkalies (e.g. caustic soda, caustic potash; sodium 
hydrosulfide);
    (8) Ammonia and ammonia solutions;
    (9) Aliphatic amines;
    (10) Alkanolamines; and
    (11) Oxidizing substances.

[CGD 78-128, 47 FR 21211, May 17, 1982, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 81-078, 50 FR 21174, May 22, 1985]



Sec.  153.1020  Unusually toxic cargoes.

    (a) No person may load or carry a cargo referenced to this section 
in Table 1 unless the cargo's piping and venting systems are separated 
from piping and venting systems carrying cargoes not referred to this 
section.
    (b) The master shall ensure that no heat transfer medium that has 
been circulated through a cargo referenced to this section in Table 1 is 
circulated through a cargo not referenced to this section unless he 
determines the medium to be uncontaminated with cargo.
    (c) No person may discharge overboard condensed steam from the 
heating system of a cargo referenced to this section in Table 1 unless 
he first determines the condensate to be uncontaminated with cargo.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21212, May 17, 1982]



Sec.  153.1025  Motor fuel antiknock compounds.

    (a) No person may load or carry any other cargo in a containment 
system approved for motor fuel antiknock compounds containing lead 
alkyls except a cargo to be used solely in the manufacture of motor fuel 
antiknock compounds.
    (b) The master shall ensure that no person enter a pumproom or void 
space that contains piping from a containment system approved for motor 
fuel antiknock compounds containing lead alkyls unless:
    (1) The pumproom or void space atmosphere has been analyzed for its 
lead (as Pb) content and found to be less than 0.075 mg/m\3\; or
    (2) The person follows the procedures for entering a cargo tank 
described in paragraph (c) of this section.
    (c) No person may enter a cargo tank endorsed for motor fuel 
antiknock compounds containing lead alkyls without prior specific 
authorization from the Commandant (CG-ENG). This authorization may be 
obtained by calling telephone number 202-372-1420 or e-mail 
[email protected] if the person has previously obtained approval 
for the cargo tank entry procedure from the Commandant (CG-ENG).
    (d) No person may enter a cargo tank endorsed for motor fuel 
antiknock compounds if he does not follow the conditions in the 
authorization under paragraph (c) of this section.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21212, May 17, 1982; CGD 82-063b, 48 FR 4782, Feb. 3, 1983; CGD 88-100, 
54 FR 40042, Sept. 29, 1989; USCG-2006-25697, 71 FR 55747, Sept. 25, 
2006; USCG-2012-0832, 77 FR 59785, Oct. 1, 2012]



Sec.  153.1035  Acetone cyanohydrin or lactonitrile solutions.

    No person may operate a tankship carrying a cargo of acetone 
cyanohydrin or lactonitrile solutions, unless that cargo is stabilized 
with an inorganic acid.

[CGD 88-100, 54 FR 40042, Sept. 29, 1989]



Sec.  153.1040  Carbon disulfide.

    (a) No person may load, carry, or discharge carbon disulfide unless 
the cargo tank has a water pad over the cargo of at least one meter 
(approx. 40 in.).
    (b) The person in charge of a carbon disulfide transfer operation 
shall ensure that carbon disulfide is discharged only by displacement or 
intank cargo pump.
    (c) No person may remove a cargo pump for a containment system that 
carries carbon disulfide unless:
    (1) The containment system has a gas free certificate issued under 
the standards in Sec.  35.01-1 of this chapter; or

[[Page 259]]

    (2) The vapor space in the pump well is filled with water.



Sec.  153.1045  Inorganic acids.

    When Table 1 refers to this section, the person in charge of cargo 
transfer shall ensure that the legends ``NO SMOKING'' and ``NO OPEN 
LIGHTS'' are displayed on the warning sign required in Sec.  153.955(a) 
when cargo is transferred.



Sec.  153.1046  Sulfuric acid.

    No person may liquefy frozen or congealed sulfuric acid other than 
by external tank heating coils.



Sec.  153.1052  Carriage of other cargoes in acid tanks.

    No person shall load or carry other cargoes in a cargo containment 
system of a U.S. flag ship endorsed to carry sulfuric acid, hydrochloric 
acid, or phosphoric acid without specific authorization from the 
Commandant (CG-ENG).

[CGD 94-900, 59 FR 45139, Aug. 31, 1994, as amended by USCG-2014-0688, 
79 FR 58284, Sept. 29, 2014]



Sec.  153.1060  Benzene.

    The person in charge of a Coast Guard inspected vessel must ensure 
that the provisions of part 197, subpart C, of this chapter are applied.

[CGD 88-040, 56 FR 65006, Dec. 13, 1991]



Sec.  153.1065  Sodium chlorate solutions.

    (a) No person may load sodium chlorate solutions into a containment 
system that previously carried another cargo unless the containment 
system is thoroughly washed before loading.
    (b) The person in charge of cargo transfer shall make sure that 
spills of sodium chlorate solutions are immediately washed away.

[CGD 81-078, 50 FR 21174, May 22, 1985]

 Approval of Surveyors and Handling of Categories A, B, C, and D Cargo 
                             and NLS Residue

    Source: CGD 81-101, 52 FR 7785, Mar. 12, 1987, unless otherwise 
noted.



Sec.  153.1100  Responsibility of the person in charge.

    The person in charge of the ship shall ensure that--
    (a) The requirements of Sec. Sec.  153.1102 through 153.1132 are 
met; and
    (b) The procedures in the approved Procedures and Arrangements 
Manual are followed.



Sec.  153.1101  Procedures for getting a Surveyor: Approval of 
Surveyors.

    (a) At least 24 hours before a Surveyor is needed, the person 
wishing the services of a Surveyor must contact the Captain of the Port 
or the Sector Office that has jurisdiction over the port at which the 
Surveyor will be needed to--
    (1) Arrange for the Coast Guard to provide a Surveyor; or
    (2) Inform the Coast Guard of the selection of a Surveyor from one 
of the organizations accepted by the Coast Guard to provide Surveyors.
    (b) Organizations may be accepted by the Coast Guard to provide 
Surveyors if they--
    (1) Are engaged, as a regular part of their business, in performing 
inspections or tests of bulk liquid cargo tanks or bulk liquid cargo 
handling equipment;
    (2) Are familiar with the references in Sec.  153.0(b) and with the 
requirements of this part;
    (3) Are not controlled by the owners or operators of ships needing 
the services of the Surveyors or the facilities at which those ships 
would unload cargo;
    (4) Are not dependent on Coast Guard acceptance under this section 
to remain in business; and
    (5) Sign a Memorandum of Understanding with the Coast Guard.
    (c) Each application for acceptance as a Surveyor must be submitted 
to the Commandant (CG-ENG) and must contain the following:
    (1) The name and address of the organization, including subsidiaries 
and divisions, requesting acceptance by the Coast Guard to provide 
Surveyors.
    (2) A statement that the organization is not controlled by the 
owners or operators of ships needing the services of Surveyors or the 
facilities at which

[[Page 260]]

these ships would unload, or a full disclosure of any ownership or 
controlling interest held by such parties.
    (3) A description of the experience and qualifications of the 
personnel who would be performing the function of Surveyor.
    (4) A statement that the persons who will be performing the function 
of Surveyor have been trained in and are familiar with the requirements 
of Annex II and the regulations in this part.
    (5) A statement that the Coast Guard may verify the information 
submitted in the application and may examine the persons who will be 
performing the function of Surveyor to determine their qualifications.
    (d) The acceptance of an organization may be terminated by the 
Commandant if the organization fails to properly perform or supervise 
the inspections required in this part.

[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by USCG-2006-25556, 
72 FR 36330, July 2, 2007]



Sec.  153.1102  Handling and disposal of NLS residue:
Categories A, B, C, and D.

    (a) Except those Category A NLS residues that must be discharged 
under paragraph (c) of this section, NLS residue from an NLS whose vapor 
pressure is 5 kPa (50 mbar) or less at 20 [deg]C (68 [deg]F) must be--

    Note to paragraph (a): The Marine Protection, Research, and 
Sanctuaries Act allows specific liquids to be discharged to the sea 
under permits issued by the EPA.

    (1) Unloaded to any consignee;
    (2) Returned to the shipper;
    (3) Discharged to a reception facility;
    (4) Retained on the ship; or
    (5) Discharged to the sea under Sec.  153.1126 or Sec.  153.1128.
    (b) Except those Category A NLS residues that must be discharged 
under paragraph (c) of this section, NLS residue from an NLS whose vapor 
pressure is greater than 5 kPa (50 mbar) at 20 [deg]C must be--
    (1) Handled in the same way as the NLS residue under paragraph (a) 
of this section; or
    (2) Ventilated following a ventilation procedure in the approved 
Procedures and Arrangements Manual.

    Note: The Clean Air Act (42 U.S.C. 7401 et seq) allows states to 
regulate emissions from tank ventilation. There may be other 
regulations, both local and Federal, that affect the use of tank 
ventilation for safety or environmental purposes.

    (c) NLS residue containing Category A NLS in pumproom bilges and in 
spill trays at the manifold must be discharged to a reception facility.

[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.1104  Draining of cargo hose: Categories A, B, C, and D.

    Before a cargo hose used in discharging an NLS from a ship's cargo 
tank is disconnected, the hose must be drained back to the transfer 
terminal unless the tank unloading the cargo has a waiver under Sec.  
153.483 or Sec.  153.491.

[CGD 81-101, 53 FR 28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.1106  Cleaning agents.

    No tank cleaning agent other than water or steam may be used to 
clean an NLS residue from a cargo tank except as prescribed in the 
approved Procedures and Arrangements Manual.



Sec.  153.1108  Heated prewash for solidifying NLS, high viscosity
NLS and required prewashes of NLS whose viscosity exceeds 25 mPa 
sec at 20 [deg]C: Categories A, B, and C.

    (a) When a high viscosity or solidifying cargo is unloaded from a 
cargo tank, the cargo tank must be prewashed unless Sec.  153.1114 or 
paragraph (c) of this section allows the prewash to be omitted.
    (b) When a prewash is required for a tank that has unloaded a 
solidifying cargo or a cargo having a viscosity exceeding 25 mPa sec at 
20 [deg]C, the wash water used in the prewash must leave the tank 
washing machine at a temperature of at least 60 [deg]C (140 [deg]F).
    (c) The prewash required under paragraph (a) of this section may be 
omitted if the approved Procedures and Arrangements Manual contains a 
procedure for measuring the temperature of all interior cargo tank 
surfaces throughout unloading and under the measuring procedure the 
temperature of these surfaces remains above--

[[Page 261]]

    (1) The temperature of the cargo's melting point if the cargo is a 
Category B or C solidifying NLS; or
    (2) The temperature at which the cargo's viscosity exceeds--
    (i) 25 mPa.s, if the cargo is a high viscosity Category B NLS; or
    (ii) 60 mPa.s, if the cargo is a high viscosity Category C NLS.

[CGD 81-101, 53 FR 28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.1112  Prewash for tanks containing Category A NLS residue.

    Unless Sec.  153.1114 allows the prewash to be omitted, a cargo tank 
that unloads a Category A NLS cargo must be prewashed following the 
procedures in Sec.  153.1120.



Sec.  153.1114  Conditions under which a prewash may be omitted:
Categories A, B, and C.

    A prewash required by this part may be omitted if one of the 
following requirements is met:
    (a) A Surveyor has signed a statement in the Cargo Record Book that 
the next cargo has been determined to be one that may be loaded without 
washing the tank, and the tank is not washed or ballasted before it is 
loaded with the next cargo.
    (b) A Surveyor has signed a statement in the Cargo Record Book that 
the approved Procedures and Arrangements Manual contains procedures for 
removing the NLS residue by ventilation, and the cargo tank is not 
washed or ballasted before being cleaned following the ventilation 
procedure.

    Note: The Clean Air Act (42 U.S.C. 7401 et seq.) allows states to 
regulate emissions from tank ventilation. There may be other 
regulations, both local and Federal, that affect the use of tank 
ventilation for safety or environmental purposes.

    (c) The tank requiring the prewash has a waiver issued under Sec.  
153.483 or Sec.  153.491 and the waiver states when the tank is to be 
prewashed.



Sec.  153.1116  Prewash for tanks unloaded without following the 
approved Procedures and Arrangements Manual: Categories B and C.

    If for any reason more Category B or C NLS residue remains in a 
cargo tank and transfer piping of a ship after unloading than would 
remain after a normal discharge of the cargo when the unloading 
procedures in the approved Procedures and Arrangements Manual are 
followed, the tank must be prewashed following the procedures in Sec.  
153.1120 unless--
    (a) Section 153.1114 allows the prewash to be omitted; or
    (b) The residue is reduced using another procedure, and a Surveyor 
estimates and states in the Cargo Record Book that the cargo tank and 
transfer piping contain no more NLS residue than they would if 
discharged following the procedures in the approved Procedures and 
Arrangements Manual, and no other prewash is required by this part.



Sec.  153.1118  Prewash of Categories B and C cargo tanks not 
meeting stripping standards: Categories B and C.

    (a) Unless Sec.  153.1114 allows the prewash to be omitted, a cargo 
tank from which a Category B NLS is unloaded must be prewashed using the 
procedures in Sec.  153.1120(b) if the tank--
    (1) Operates under the interim standard in Sec.  153.481(b); or
    (2) Has a waiver issued under Sec.  153.483.
    (b) Unless Sec.  153.1114 allows the prewash to be omitted, a cargo 
tank from which a Category C NLS is unloaded must be prewashed using the 
procedures in Sec.  153.1120(b) if the tank has a waiver issued under 
Sec.  153.483.



Sec.  153.1119  When to prewash and discharge NLS residues from
a prewash; unloading an NLS cargo in a country whose Administration
is not signatory to MARPOL 73/78: Categories A, B, and C.

    (a) Except as allowed in paragraphs (b), (c), and (e) of this 
section, each prewash required by this subpart must be completed and all 
tank washings must be discharged to a reception facility before the ship 
leaves the unloading port.
    (b) NLS residue from the prewash following the unloading of a 
Category B NLS may be transferred to a slop tank for discharge under 
Sec.  153.1126 instead of being discharged under paragraph (a) of this 
section if the prewash is required solely under Sec.  153.1118(a)(1).

[[Page 262]]

    (c) A tank that is required by this part to be prewashed may be 
prewashed in a port other than the unloading port if the following 
conditions are met:
    (1) The person in charge requests permission from the Commandant 
(CG-ENG) (tel num: 202-372-1420; email: [email protected]) if the 
prewash port is a foreign port, or the Captain of the Port having 
jurisdiction over the unloading port if the prewash port is a U.S. port.
    (2) The person in charge supplies with the request required under 
paragraph (c)(1) of this section--
    (i) The name of the ship;
    (ii) The name of the owner;
    (iii) The name of the NLS;
    (iv) The approximate date the tank will be prewashed if the 
relocation of the prewash port is for one time only;
    (v) A written agreement to receive the tank washings by a reception 
facility in the prewash port;
    (vi) When the prewash port or terminal is in a country whose 
Administration is signatory to MARPOL 73/78, a written attestation from 
the person in charge of each prewash port or terminal that the 
Administration has determined the port or terminal to have adequate 
reception facilities for the NLS residue;
    (vii) Written pledges from the person in charge that--
    (A) The tank to be prewashed will not be washed or ballasted before 
being prewashed; and
    (B) The ship will be taken to the reception facility and the tank 
prewashed in accordance with the requirements in Sec.  153.1120; and
    (viii) Any additional information the Captain of the Port or 
Commandant (CG-ENG) requests to evaluate granting the permission.
    (3) The Coast Guard or Commandant (CG-ENG) has granted the 
permission in writing, the permission is carried aboard the ship, and 
the person in charge of the ship has made an entry in the Cargo Record 
Book stating that the permission has been granted.
    (d) Unless the permission granted under paragraph (c)(4) of this 
section includes alternate conditions of termination or revocation in 
writing, the permission is--
    (1) Terminated after the tank is prewashed as pledged in paragraph 
(c)(3)(vii) of this section or loaded with another cargo;
    (2) Revoked if either of the pledges in paragraph (c)(3)(vii) of 
this section is invalidated or the agreement in paragraph (c)(3)(v) of 
this section is repudiated; and
    (3) Revoked at any time the ship is not operated in accordance with 
the pledges in paragraph (c)(3)(vii) of this section and the conditions 
listed with the granted permission.
    (e) A U.S. ship that would otherwise be required by this part to 
prewash in a port without reception facilities must obtain permission 
from Commandant (CG-ENG) to prewash in an alternate port.

[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by USCG-2006-25697, 
71 FR 55747, Sept. 25, 2006; USCG-2014-0688, 79 FR 58284, Sept. 29, 
2014]



Sec.  153.1120  Procedures for tank prewash: Categories A, B, and C.

    Except where the approved Procedures and Arrangements Manual 
prescribes a different procedure, each of the following steps must be 
done in the order listed for the Coast Guard to consider the tanks 
prewashed under this part:
    (a) When this part requires a prewash of a tank containing Category 
A NLS residue and the alternative prewash procedure in paragraph (b) of 
this section is not used, the prewash must meet the following:
    (1) The prewash may not begin until--
    (i) A Surveyor is present; and
    (ii) Instrumentation or equipment is available that is capable of 
measuring the concentration of the Category A NLS in the NLS residue and 
determining whether it is below 0.1 per cent by weight.
    (2) The equipment specified in Sec.  153.484 must be used as 
prescribed in the approved Procedures and Arrangements Manual for the 
prewash.
    (3) The wash water must be heated if required by Sec.  153.1108, and 
water or tank washings must pass through the cargo pump and piping, 
including any stripping equipment, during washing or during discharge of 
tank washings.

[[Page 263]]

    (4) The tank washing machine must be placed in all positions 
specified for the tank's Category A NLS prewash procedure in the 
approved Procedures and Arrangements Manual.
    (5) The tank must be pumped out each time there are enough tank 
washings collected in the bottom of the tank for the pump to gain 
suction, and if the NLS is immiscible with water or is a solidifying 
cargo, all floating and suspended NLS must be discharged.
    (6) The washing machine must be operated until samples of the 
discharged tank washings taken by the Surveyor are tested using the 
equipment required by paragraph (a)(1)(ii) of this section and the 
concentration of NLS is below 0.1 per cent by weight.
    (7) After the washing is stopped, the remaining tank washings must 
be pumped out.
    (8) The Cargo Record Book must have items 12 through 14 completed 
and must show the Surveyor's written certification of their accuracy.
    (9) The Cargo Record Book must have the Surveyor's written 
concurrence that the prewash procedures specified in the approved 
Procedures and Arrangements Manual were followed.
    (b) When this part requires a prewash of a tank containing Category 
B or C NLS residue or when the procedure in this paragraph is used as an 
alternative to the prewash procedure under paragraph (a) of this 
section, the prewash must meet the following:
    (1) If the prewash is for a Category A NLS, the prewash may not 
begin until a Surveyor is present.
    (2) The equipment specified in Sec.  153.484 must be used as 
prescribed in the approved Procedures and Arrangements Manual for the 
prewash.
    (3) The wash water must be heated if required by Sec.  153.1108, and 
water or tank washings must pass through the cargo pump and piping, 
including any stripping equipment, during washing or during discharge of 
tank washings.
    (4) Except as required in paragraph (b)(5) of this section, the 
number of washing machine cycles specified in Table 153.1120 must be 
completed. If a prewash is required by a section listed under Column 1 
of Table 153.1120 and another section listed under Column 2, the number 
of cycles in Column 1 must be completed but no additional cycles are 
necessary.
    (5) If the approved Procedures and Arrangements Manual specifies 
that a tank washing machine must be moved for the prewash of a tank from 
which a Category A NLS or a solidifying NLS has been unloaded, the 
number of washing machine cycles specified in Table 153.1120 must be 
completed at each position to which the washing machine is moved.
    (6) When the NLS is immiscible with water or is a solidifying cargo, 
the tank must be pumped out each time enough tank washings collect in 
the bottom of the tank for the pump to gain suction, or the procedures 
in paragraphs (b)(3), (b)(4), and (b)(5) of this section must be 
repeated two additional times with the tank pumped out each time, for a 
total of three washings.
    (7) Items 12 through 14 in the Cargo Record Book must be completed 
and, if the prewash is for a Category A NLS, verification that the 
procedures specified in the approved Procedures and Arrangements Manual 
were followed shown by the Surveyor's endorsement in the Cargo Record 
Book.

     Table 153.1120--Number of Washing Machine Cycles in the Prewash
                                Procedure
------------------------------------------------------------------------
                                       Number of washing machine cycles
                                     -----------------------------------
                                          Column 1:
                                        Prewash under
                                       Sec.   153.1116      Column 2:
                                          or for a      Prewashes except
                                       solidifying NLS    those listed
                                         under Sec.      under column 1
                                          153.1108
------------------------------------------------------------------------
Category A NLSec.....................                 2                 1
Category B or C NLSec................                 1               1/2
------------------------------------------------------------------------


[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28975, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.1122  Discharges of NLS residue from tank washing other than
a prewash: Categories A, B, and C.

    Tank washings that do not result from a prewash and that contain 
Category A, B, or C NLS residues must be discharged to a reception 
facility or discharged to the sea under Sec.  153.1126 or Sec.  153.1128 
except those tank washings resulting from washing a tank that has been 
cleaned following a ventilation procedure in the approved Procedures and 
Arrangements Manual.

[[Page 264]]



Sec.  153.1124  Discharges of Category D NLS residue.

    NLS residue from Category D NLSs must be discharged to a reception 
facility or discharged to the sea using the following procedure:
    (a) Before discharge begins, drain or flush the NLS residue in the 
tank's piping systems into the tank.
    (b) After draining or flushing, discharge the NLS residue to the sea 
in accordance with Sec.  153.1128 or transfer it to a slop tank and 
discharge in accordance with Sec.  153.1126.



Sec.  153.1126  Discharge of NLS residue from a slop tank to the sea:
Categories A, B, C, and D.

    NLS residue in a slop tank may not be discharged into the sea 
unless--
    (a) The ship meets the conditions for discharging the NLS residue 
from a cargo tank in Sec.  153.1128; and
    (b) For Category B NLS residue transferred to the slop tank under 
Sec.  153.1119(b), the NLS is discharged--
    (1) Through an NLS residue discharge system with the flow recording 
equipment required in Sec.  153.481(b)(2) operating; and
    (2) At a rate maintained at or below Q in the following:
    For tank contents that are miscible
    [GRAPHIC] [TIFF OMITTED] TC13NO91.045
    
    For tank contents that are immiscible

Q = KU\1.4\ L\1.6\ x 10-5 m\3\/hr

where:

Q = maximum permissible slops discharge rate in cubic meters per hour.
V = volume of slops in the tank in cubic meters.
K = 4.3, except K = 6.45 if Q is distributed between two NLS residue 
          discharge outlets on opposite sides of the ship (see 
          Sec. Sec.  153.470(c) and 153.481(b)).
U = ship's speed in knots.
L = ship's length in meters.
N = number of tanks containing Category B NLS residue pumped into the 
          slop tank.



Sec.  153.1128  Discharge of NLS residue from a cargo tank to the sea:
Categories A. B, C, and D.

    The discharge of NLS residue to the sea must be made with the ship 
at least 22.24 km (12 nautical miles) from the nearest land, and must 
meet the following additional conditions:
    (a) To discharge the following the ship must be in water at least 25 
m (76.2 ft) deep:
    (1) Category B or C NLS residue diluted to less than 1 ppm of the 
NLS.
    (2) Category B or C NLS residue resulting from washing a tank after 
the following washing procedure has been completed:
    (i) If the tank is not required to be prewashed under this part, the 
tank must be washed following the procedures that apply to a prewash of 
a Category B NLS in Sec.  153.1120 using one washing machine cycle, and 
the tank washings discharged to a reception facility or to the sea under 
Sec.  153.1126 or paragraph (a)(1), (c) or (d) of this section.
    (ii) After the tank has been prewashed or has been washed under 
paragraph (a)(2)(i) of this section, the tank must then be washed with 
one cycle of the tank washing machine, and the tank washings discharged 
to a reception facility or to the sea in accordance with Sec.  153.1126 
or paragraph (a)(1), (c), or (d) of this section.
    (b) To discharge a Category D NLS residue to which 10 times its 
volume in water is added and mixed, the ship must be--
    (1) If self-propelled, maintained at a speed of at least 12.97 km/hr 
(7 knots); and
    (2) If not self-propelled, maintained at a speed of at least 7.41 
km/hr (4 knots).
    (c) Each ship built before July 1, 1986 that discharges Category A, 
B or C NLS residues before January 1, 1988 must be--
    (1) In water at least 25 m (76.2 ft) deep;
    (2) If discharging the residue of a Category A NLS cargo, 
discharging only residue created by washing the Category A NLS's cargo 
tank after a prewash;
    (3) If discharging the residue of a Category B NLS cargo, 
discharging no more than the larger of 1 m\3\ or 1/3000th the volume of 
the Category B cargo loaded;
    (4) If discharging the residue of a Category C NLS cargo, 
discharging no more than the larger of 3 m\3\ of or

[[Page 265]]


1/1000th the volume of the Category C cargo loaded;
    (5) If self-propelled, maintained at a speed of at least 12.97 km/hr 
(7 knots); and
    (6) If not self-propelled, maintained at a speed of at least 7.41 
km/hr (4 knots).
    (d) To discharge Category A, B, C, or D NLS residue other than as 
allowed under paragraphs (a) through (c) of this section, the ship must 
be--
    (1) In water at least 25 m (76.2 ft) deep;
    (2) Discharging at a rate not exceeding that used for Qd 
in Sec.  153.470;
    (3) If self-propelled, maintained at speed no less than the minimum 
specified in the approved Procedures and Arrangements Manual but at 
least 12.97 km/hr (7 knots);
    (4) If not self-propelled, maintained at a speed no less than the 
minimum specified in the approved Procedures and Arrangements Manual but 
at least 7.41 km/hr (4 knots);
    (5) If discharging the residue of a Category A NLS cargo, 
discharging only residue created by washing the Category A NLS's cargo 
tank after a prewash;
    (6) If discharging the residue of a Category B NLS cargo, 
discharging no more than the larger of 1 m\3\ or 1/3000th the volume of 
the Category B cargo loaded;
    (7) If discharging the residue of a Category C NLS cargo, 
discharging no more than the larger of 3 m\3\ of or

1/1000th the volume of the Category C cargo loaded;
    (8) Discharging through an NLS residue discharge system meeting 
Sec.  153.470.

[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by CGD 81-101, 53 FR 
28976, Aug. 1, 1988 and 54 FR 12629, Mar. 28, 1989]



Sec.  153.1130  Failure of slops discharge recording equipment; 
operating with, reporting failures, and replacing pollution equipment:
Category A, B, C, D.

    (a) If equipment required in Sec. Sec.  153.470 through 153.488 
fails, the Coast Guard Marine Inspection Office, Sector Office, or 
Captain of the Port must be notified within 24 hours after the failure.
    (b) No person shall replace a piece of equipment required by 
Sec. Sec.  153.470 through 153.488 unless the replacement is--
    (1) Identical to the original equipment; or
    (2) Allowed as an alternative under Sec.  153.10.
    (c) The following conditions apply when discharge recording 
equipment required under Sec.  153.481(b)(2) fails:
    (1) No NLS residue may be discharged unless the approved Procedures 
and Arrangements Manual contains procedures for discharging with 
incapacitated discharge recording equipment while meeting the discharge 
restrictions of Sec.  153.1126(b) and these procedures are followed.
    (2) The failure of the discharge recording equipment must be 
recorded in the Cargo Record Book within 24 hours after the failure.
    (3) If the ship operates under a Certificate of Inspection, the 
failed discharge recording equipment must be repaired or replaced within 
60 days after it fails, and the repair or replacement recorded in the 
Cargo Record Book and reported to the Coast Guard within 24 hours after 
it is completed.

[CGD 81-101, 52 FR 7785, Mar. 12, 1987, as amended by USCG-2006-25556, 
72 FR 36330, July 2, 2007]



Sec.  153.1132  Reporting spills and non-complying discharges:
Category A, B, C, and D.

    The following shall be reported following the procedures applying to 
oil in 33 CFR 151.15 (c), (d), (g), (h):
    (a) All discharges of the NLS that do not meet the requirements of 
this part.
    (b) All spills into the water.

                               Maintenance



Sec.  153.1500  Venting system rupture disks.

    The master shall ensure that a relief valve exposed to a cargo after 
the failure of a rupture disk or breaking pin is cleaned and operates 
properly before the next cargo is loaded into the tank.



Sec.  153.1502  Fixed ballast relocation.

    No person may remove or relocate fixed ballast unless:
    (a) The change is approved by the Commandant (CG-ENG); or

[[Page 266]]

    (b) The ballast is temporarily moved under the supervision of a 
Coast Guard Marine Inspector for examination or repair of the tankship.

[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 82-063b, 48 
FR 4782, Feb. 3, 1983]



Sec.  153.1504  Inspection of personnel emergency and safety equipment.

    The master shall ensure that the personnel emergency and safety 
equipment required by Sec.  153.214 is inspected each 30 days and found 
to be in good condition and operating properly.



  Subpart D_Test and Calculation Procedures for Determining Stripping 
          Quantity, Clingage NLS Residue, and Total NLS Residue

    Source: CGD 81-101, 52 FR 7788, Mar. 12, 1987, unless otherwise 
noted.



Sec.  153.1600  Equipment required for conducting the stripping
quantity test.

    The operator shall ensure the stripping quantity test is conducted 
with--
    (a) Equipment that maintains a backpressure of at least 100 kPa (1 
atm) (gauge) at the connection of the discharge line of the tank to be 
tested to the cargo transfer hose, including, but not limited to, piping 
whose discharge is 10 m above the manifold or a constant pressure valve 
in the discharge line and set at 100 kPa;
    (b) A container for measuring the volume of water remaining in the 
tank to an accuracy of 5%;
    (c) A squeegee or broom to collect standing water on the tank floor;
    (d) One or more containers for collecting and transferring water; 
and
    (e) One of the following for transferring the water remaining in the 
tank to the measuring container:
    (1) A wet vacuum.
    (2) A positive displacement pump.
    (3) An eductor with an air/water separator in line.



Sec.  153.1602  Test procedure for determining the stripping quantity.

    (a) The stripping quantity of a tank must be determined by testing 
the tank under the procedures in paragraph (b) of this section unless 
the Coast Guard agrees under the provisions of Sec.  153.10 to accept 
the stripping quantity, previously determined under paragraph (b) of 
this section, of a tank having similar geometry, internal structure, and 
piping system.
    (b) When testing a tank for stripping quantity, the owner or 
operator of the ship shall proceed as follows:
    (1) Make arrangements with the Officer in Charge, Marine Inspection, 
for a Coast Guard Marine Inspector to witness the stripping test.
    (2) Clean and gas free the tanks to be tested.
    (3) Determine the least favorable values of list and trim for 
drainage within the range allowed by the approved Procedures and 
Arrangements Manual.
    (4) Maintain the ship's list and trim during the test to that 
determined under paragraph (b)(3) of this section.
    (5) Load the tank with enough water so that unloading the water 
simulates the final stages of unloading a full tank of cargo.
    (6) Pump out the water and strip the tank using the procedures 
specified in the approved Procedures and Arrangements Manual.
    (7) After shutting the manifold valve, open any cargo pump foot 
valve to allow water trapped in the cargo pump to drain into the tank.
    (8) Open all valves in the piping system except the manifold valve 
and allow the water to drain into the tank.
    (9) Squeegee or sweep the water drained under paragraphs (b)(7) and 
(b)(8) of this section and any water that stands in puddles on the tank 
floor to the tank's low point or sump and collect in the container 
required by Sec.  153.1600(b) using the equipment required in Sec.  
153.1600(e).
    (10) With the manifold valve still closed, drain any water remaining 
in the piping system on the ship's side of the cargo transfer manifold 
valve into containers, and add this water to that collected from the 
tank under paragraph (b)(9) of this section. Water collected from a 
cargo line serving a block of tanks may be prorated between all the 
tanks it serves if--
    (i) The ship owner requests, under the provisions of Sec.  153.10, 
that the water be prorated; and

[[Page 267]]

    (ii) The ship's approved Procedures and Arrangements Manual 
specifies that no tank in the block be washed until all the tanks in the 
block have been discharged.
    (c) Include any water that is trapped in dead end pipe sections, 
either by--
    (1) Draining the pipe sections and adding the water to that 
collected in the container under paragraphs (b)(9) and (b)(10) of this 
section; or
    (2) Adding an estimate of the water's volume to the sum calculated 
in paragraph (d) of this section using the pipe's dimensions, the ship's 
list and trim, and the geometry of the piping system.
    (d) Measure the volume of water collected in the container under 
paragraphs (b)(9), (b)(10), and (c)(1) of this section and add to that 
volume the volume, if any, estimated under paragraph (c)(2) of this 
section.

[CGD 81-101, 52 FR 7788, Mar. 12, 1987]



Sec.  153.1604  Determining the stripping quantity from the test results.

    (a) For a single test, the stripping quantity is the volume of water 
calculated under Sec.  153.1602(d).
    (b) If multiple tests are made on a tank without modifications to 
the tank, pumping system, or stripping procedure between the tests, the 
stripping quantity must be taken as the average of the stripping 
quantities for all of the tests.
    (c) If multiple tests are made on a tank with modifications to the 
tank, pumping system, or stripping procedure between the tests, the 
stripping quantity is the stripping quantity determined under paragraph 
(b) of this section using only those tests performed after the last 
modification.



Sec.  153.1608  Calculation of total NLS residue and clingage NLS residue.

    (a) The total NLS residue for each tank is calculated by adding the 
stripping quantity and the clingage NLS residue.
    (b) The clingage NLS residue for each tank is calculated using the 
following formula:

Qclingage = 1.1 x 10-4 Ad + 1.5 x 
10-5 Aw + 4.5 x 10-4 L\1/2\ 
Ab

where:

Ab = Area of the tank bottom added to the area in square 
          meters of tank structural components projected on a horizontal 
          surface
Ad = Area of the tank underdecks added to the area in square 
          meters of tank structural components projected on a horizontal 
          surface
Aw = Area of the tank walls added to the area in square 
          meters of tank structural components projected on a vertical 
          surface
L = Length of tank in meters from fore to aft
Qclingage = volume of clingage in cubic meters

When using the formula in this paragraph, areas that are inclined more 
than 30[deg] from the horizontal may be assumed to be vertical.

    Note: The Commandant (CG-ENG) (telephone number 202-372-1420) has 
information that may be useful in approximating surface areas of typical 
structural members for the projected area calculations under Sec.  
153.1608(b).

[CGD 81-101, 52 FR 7788, Mar. 12, 1987, as amended by USCG-2006-25697, 
71 FR 55747, Sept. 25, 2006; USCG-2012-0832, 77 FR 59785, Oct. 1, 2012]

[[Page 268]]

          Table 1 to Part 153--Summary of Minimum Requirements

--------------------------------------------------------------------------------------------------------------------------------------------------------
                                 IMO Annex
                                     II                 Cargo       Vent                                  Fire       Special requirements    Electrical
           Cargo name            Pollution    Haz.   containment   height      Vent        Gauge       protection     in 46 CFR Part 153    hazard class
                                  Category              system                                           system                               and group
--------------------------------------------------------------------------------------------------------------------------------------------------------
a.                                      b.       c.          d.        e.  f.           g.           h.             i.....................  j.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Acetic acid....................      D         S         III         4m    PV           Restr        A              .238(a), .409, .527,    I-D
                                                                                                                     .554, .933.
Acetic anhydride...............      D         S          II         4m    PV           Restr        A              .238(a), .409, .526,    I-D
                                                                                                                     .527, .554, .933.
Acetochlor.....................      A         P          II         NR    Open         Open         A              .409..................  NA
Acetone cyanohydrin............      A        S/P         II        B/3    PV           Closed       A              .238(a), .316, .336,    I-D
                                                                                                                     .408, .525, .526,
                                                                                                                     .527, .912(a)(2),
                                                                                                                     .933, .1002, .1004,
                                                                                                                     .1020, .1035.
Acetonitrile...................     III        S          II        B/3    PV           Restr        A              .409, .525, .526,       I-D
                                                                                                                     .1020.
Acrylamide solution (50% or          D         S          II         NR    Open         Closed       NSR            .409, .525(a), (c),     NA
 less).                                                                                                              (d), (e), .912(a)(1),
                                                                                                                     .1002(a), .1004,
                                                                                                                     .1020.
Acrylic acid...................      D         S         III         4m    PV           Restr        A              .238(a), .409, .526,    I-D
                                                                                                                     .912(a)(1), .933,
                                                                                                                     .1002(a), .1004.
Acrylonitrile..................      B        S/P         II        B/3    PV           Closed       A              .236(a), (c), (d),      I-D
                                                                                                                     .316, .408, .525,
                                                                                                                     .526, .527,
                                                                                                                     .912(a)(1), .1004,
                                                                                                                     .1020.
Adiponitrile...................      D         S         III         4m    PV           Restr        A              .526..................  I-D
Alachlor.......................      B        S/P        III         NR    Open         Open         A, C           .238(a), .409, .440,    NA
                                                                                                                     .488, .908(a), (b).
Alcohol (C6-C17) (secondary)         A         P          II         NR    Open         Open         A              .409..................  NA
 poly(3-6)ethoxylates.
Alcohol (C6-C17) (secondary)         B         P         III         NR    Open         Open         A              .409, .440, .908(a),    NA
 poly(7-12)ethoxylates.                                                                                              (b).
Alcohol(C9-C11) poly(2.5-9)          B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
 ethoxylate.
Alcohol(C12-C15)
 poly(...)ethoxylates, see
 Alcohol(C12-C16)
 poly(...)ethoxylates.
Alcohol(C12-C16) poly(1-             A         P          II         NR    Open         Open         A              .409..................  NA
 6)ethoxylates.
Alcohol(C12-C16) poly(7-             B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
 19)ethoxylates.
Alcohol(C12-C16) poly(20 +           C         P         III         NR    Open         Open         A              None..................  NA
 )ethoxylates.
Alkanes(C6-C9) (all isomers)...      C         P         III         4m    PV           Restr        A              .409..................  I-D
Alkane(C14-C17) sulfonic acid,       B         P         III         NR    Open         Open         NSR            .440, .908(a).........  NA
 sodium salt solution (65% or
 less).
Alkaryl polyether (C9-C20).....      B         P         III         NR    Open         Open         A, B           .409; (.440, .908(a))   NA
                                                                                                                     \1\.
Alkenyl(C16-C20) succinic            D         S         III        B/3    PV           Closed       NSR            .316, .408, .525,       NA
 anhydride.                                                                                                          .526, .1020.
Alkyl acrylate-Vinyl pyridine        C         P         III         4m    PV           Restr        A              .409..................  NA
 copolymer in Toluene.
Alkylaryl phosphate mixtures         A        S/P         I         B/3    PV           Closed       A, B, C        .316, .408, .525,       NA
 (more than 40% Diphenyl tolyl                                                                                       .526, .1020.
 phosphate, less than 0.02%
 ortho- isomer).
Alkyl(C3-C4)benzenes (all            A         P         III         4m    PV           Restr        A              .409..................  I-D
 isomers).
Alkyl(C5-C8)benzenes (all            A         P          II         NR    Open         Open         A              .409..................  I-D
 isomers).
Alkylbenzene, Alkylindane,           A         P          II         NR    Open         Open         A              .409..................  NA
 Alkylindene mixture (each C12-
 C17).
Alkylbenzenesulfonic acid            C        S/P        III         NR    Open         Open         A, B           .440, .908(a).........  NA
 (greater than 4%).

[[Page 269]]

 
Alkylbenzenesulfonic acid,           C         P         III         NR    Open         Open         NSR            .440, .903, .908(a),    NA
 sodium salt solution.                                                                                               (b).
Alkyl(C7-C9) nitrates..........      B        S/P         II         NR    Open         Open         A, B           .409, .560, .1002.....  NA
Alkyl (C7-C11) phenol poly(4-        B         P         III         NR    Open         Open         A              .409, .440, .488 \1\,   I-D
 12) ethoxylate.                                                                                                     .908(a), (b).
Alkyl(C8-C9) phenylamine in          A         P         III         4m    PV           Restr        A              .409..................  NA
 aromatic solvent.
Alkyl(C10-C20, saturated and         C         P         III         NR    Open         Open         A              None..................  NA
 unsaturated) phosphite.
Alkyl(C8-C10) polyglucoside          C         P         III         NR    Open         Open         NSR            .440, .908(a), (b)....  NA
 solution (65% or less).
Alkyl(C12-C14) polyglucoside         B         P         III         NR    Open         Open         NSR            .409, .440, .908(a),    NA
 solution (55% or less).                                                                                             (b).
Alkyl(C8-C10)/(C12-C14): (40%        B         P         III         NR    Open         Open         NSR            .409, .440, .908(a),    NA
 or less/60% or more)                                                                                                (b).
 polyglucoside solution (55% or
 less).
Alkyl(C8-C10)/(C12-C14): (50/        C         P         III         NR    Open         Open         NSR            .440, .908(a), (b)....  NA
 50%) polyglucoside solution
 (55% or less).
Alkyl(C8-C10)/(C12-C14): (60%        C         P         III         NR    Open         Open         NSR            .440, .908(a), (b)....  NA
 or more/40% or less)
 polyglucoside solution (55% or
 less).
Allyl alcohol..................      B        S/P         II        B/3    PV           Closed       A              .316, .408, .525,       I-C
                                                                                                                     .526, .527, .933,
                                                                                                                     .1020.
Allyl chloride.................      B        S/P         II        B/3    PV           Closed       A              .316, .408, .525,       I-D
                                                                                                                     .526, .527, .1020.
Aluminum chloride (30% or            D         S         III         4m    PV           Restr        NSR            .252, .526, .527,       I-B
 less), Hydrochloric acid (20%                                                                                       .554, .557, .933,
 or less) solution.                                                                                                  .1045, .1052.
2-(2-Aminoethoxy) ethanol......      D         S         III         NR    Open         Open         A, C, D        .236(b), (c), .409....  NA
Aminoethylethanolamine.........      D         S         III         NR    Open         Open         A              .236(a), (b), (c), (g)  NA
N-Aminoethylpiperazine.........      D         S         III         4m    PV           Restr        A              .236(b), (c), .409,     I-C
                                                                                                                     .526.
2-Amino-2-methyl-1-propanol          D         S         III         NR    Open         Open         A              .236(a), (b), (c), (g)  I-D
 (90% or less).
Ammonia aqueous (28% or less),
 see Ammonium hydroxide (28% or
 less NH3).
Ammonium bisulfite solution          D         S         III         4m    PV           Restr        No             .238(e), .526, .933,    NA
 (70% or less).                                                                                                      .1002.
Ammonium hydroxide (28% or less      C        S/P        III         4m    PV           Restr        A, B, C        .236(b), (c), (f),      I-D
 NH3).                                                                                                               .526, .527.
Ammonium nitrate solution            D         S          II         NR    Open         Open         NSR            .238(d), .252, .336,    NA
 (greater than 45% and less                                                                                          .409, .554(a), (b).
 than 93%).
Ammonium sulfide solution (45%       B        S/P         II        B/3    PV           Closed       A, C           .236(a), (b), (c),      I-D
 or less).                                                                                                           (g), .316, .408,
                                                                                                                     .525, .526, .527,
                                                                                                                     .933, .1002, .1020.
Ammonium thiocyanate (25% or         C         P         III         NR    Open         Open         NSR            None..................  NA
 less), Ammonium thiosulfate
 (20% or less) solution.
Ammonium thiosulfate solution        C         P         III         NR    Open         Open         NSR            .440, .908(b).........  NA
 (60% or less).
Amyl acetate (all isomers).....      C         P         III         4m    PV           Restr        A              .409..................  I-D
tert-Amyl methyl ether.........      C         P         III         4m    PV           Restr        A              .409..................  NA
Aniline........................      C        S/P         II        B/3    PV           Closed       A              .316, .408, .525,       I-D
                                                                                                                     .526, .933, .1020.
Anthracene oil (Coal tar
 fraction), see Coal tar.

[[Page 270]]

 
Aviation alkylates.............      C         P         III         4m    PV           Restr        B              .409..................  I-C
 (C8 paraffins and iso-
 paraffins, b. pt. 95-120 deg.
 C).
Barium long chain (C11-C50)          B        S/P         II         NR    Open         Open         A, D           .408, .440, .525(a),    NA
 alkaryl sulfonate.                                                                                                  (c), (e), (d),
                                                                                                                     .908(a), .1020.
Barium long chain alkyl (C8-        [A]        P          II         NR    Open         Open         A              .409..................  NA
 C14) phenate sulfide.
Benzene hydrocarbon mixtures       C \2\      S/P        III        B/3    PV           Closed       A, B           .316, .409, .440,       I-D
 \2\ (having 10% Benzene or                                                                                          .526, .908(b), .933,
 more).                                                                                                              .1060.
Benzenesulfonyl chloride.......      D         S         III         4m    PV           Restr        A, B, D        .236(a), (b), (c),      I-D
                                                                                                                     (g), .409, .526.
Benzene, Toluene, Xylene           @C \2\     S/P        III        B/3    PV           Closed       B              .316, .409, .440,       I-D
 mixtures \2\ (having 10%                                                                                            .526, .908(b), .1060.
 Benzene or more).
Benzyl acetate.................      C         P         III         NR    Open         Open         A              None..................  I-D
Benzyl alcohol.................      C         P         III         NR    Open         Open         A              None..................  I-D
Benzyl chloride................      B        S/P         II        B/3    PV           Closed       A, B           .316, .408, .525,       I-D
                                                                                                                     .526, .527,
                                                                                                                     .912(a)(2), .1004,
                                                                                                                     .1020.
Bromochloromethane.............      D         S         III         4m    PV           Restr        NSR            .236(a), (b), (d),      NA
                                                                                                                     .526, .933.
Butene oligomer................      B         P         III         NR    Open         Open         A              .409..................  NA
Butyl acetate (all isomers)....      C         P         III         4m    PV           Restr        A              .409..................  I-D
Butyl acrylate (all isomers)...      B        S/P         II         4m    PV           Restr        A              .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Butylamine (all isomers).......      C        S/P         II        B/3    PV           Restr        A              .236(b), (c), .316,     I-D
                                                                                                                     .408, .525, .526,
                                                                                                                     .527, .1020.
Butylbenzene (all isomers), see      A         P         III         4m    PV           Restr        A              .409..................  I-D
 Alkyl(C3-C4)benzenes (all
 isomers).
Butyl benzyl phthalate.........      A         P          II         NR    Open         Open         A              .409..................  I-D
n-Butyl butyrate, see Butyl
 butyrate (all isomers).
Butyl butyrate (all isomers)...      B         P         III         4m    PV           Restr        A              .409..................  I-D
1,2-Butylene oxide.............      C        S/P        III         4m    PV           Restr        A, C           .372, .409, .440,       I-B
                                                                                                                     .500, .526, .530(a),
                                                                                                                     (c), (e)-(g), (m)-
                                                                                                                     (o), .1010, .1011.
n-Butyl ether..................      C        S/P        III        B/3    PV           Restr        A, D           .409, .500, .525,       I-C
                                                                                                                     .526, .1020.
Butyl heptyl ketone............     [C]        P         III         NR    Open         Open         A              None..................  NA
iso-Butyl isobutyrate, see
 Butyl butyrate (all isomers).
Butyl methacrylate.............      D         S         III         4m    PV           Restr        A, D           .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Butyl methacrylate, Decyl            D         S         III         4m    PV           Restr        A, C, D        .912(a)(1), .1002(a),   I-D
 methacrylate, Cetyl-Eicosyl                                                                                         (b), .1004.
 methacrylate mixture.
n-Butyl propionate.............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Butyl toluene..................      @A        P          II         NR    Open         Open         A              .409..................  I-D
Butyraldehyde (all isomers)....      C        S/P        III         4m    PV           Restr        A              .409, .526............  I-C
Butyric acid...................      D         S         III         4m    PV           Restr        A              .238(a), .554.........  I-D
Calcium alkyl(C9)phenol              A         P          II         NR    Open         Open         A, B           .409..................  NA
 sulfide, polyolefin
 phosphorosulfide mixture.

[[Page 271]]

 
Calcium bromide, Zinc bromide
 solution, see Drilling brine
 (containing Zinc salts).
Calcium hypochlorite solution        C        S/P        III         4m    PV           Restr        NSR            .236(a), (b)..........  NA
 (15% or less).
Calcium hypochlorite solution        B        S/P        III         4m    PV           Restr        NSR            .236(a), (b), .409....  NA
 (more than 15%).
Calcium long chain alkyl(C5-         C         P         III         NR    Open         Open         A              None..................  NA
 C10) phenate.
Calcium long chain alkyl             C         P         III         NR    Open         Open         A, B           (.440, .903, .908(a))   NA
 salicylate (C13 + ).                                                                                                \1\.
Camphor oil....................      B        S/P         II         4m    PV           Restr        A, B           .409..................  I-D
Carbolic oil...................      A        S/P         II        B/3    PV           Closed       A              .408, .440, .525,       NA
                                                                                                                     .526, .908(b), .933,
                                                                                                                     .1020.
Carbon disulfide...............      B        S/P         II        B/3    PV           Closed       C              .236(c), .252, .408,    I-A
                                                                                                                     .500, .515, .520,
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020, .1040.
Carbon tetrachloride...........      B        S/P        III        B/3    PV           Closed       NSR            .316, .409, .525,       NA
                                                                                                                     .526, .527, .1020.
Cashew nut shell oil                 D         S         III         4m    PV           Restr        A, B           .526, .933............  NA
 (untreated).
Caustic potash solution........      C        S/P        III         NR    Open         Open         NSR            .236(a), (c), (g),      NA
                                                                                                                     .933.
Caustic soda solution..........      D         S         III         NR    Open         Open         NSR            .236(a), (c), (g),      NA
                                                                                                                     .933.
Cetyl-Eicosyl methacrylate          III        S         III         NR    Open         Open         A, C, D        .912(a)(1), .1002(a),   NA
 mixture.                                                                                                            (b), .1004.
Chlorinated paraffins (C10-C13)      A         P          I          NR    Open         Open         A              .408..................  NA
Chloroacetic acid (80% or less)      C        S/P         II        B/3    PV           Closed       NSR            .238(e), .408, .440,    I-D
                                                                                                                     .554, .908(b).
Chlorobenzene..................      B        S/P        III         4m    PV           Restr        A, B           .409, .526............  I-D
Chloroform.....................      B        S/P        III        B/3    PV           Restr        NSR            .409, .525, .526,       NA
                                                                                                                     .527, .1020.
(crude) Chlorohydrins..........      D         S          II        B/3    PV           Closed       A              .408, .525, .526,       I-D
                                                                                                                     .1020.
4-Chloro-2-methylphenoxyacetic       C         P         III         NR    Open         Open         NSR            .236(a), (b), (c), (g)  NA
 acid, dimethylamine salt
 solution.
o-Chloronitrobenzene                 B        S/P         II        B/3    PV           Closed       A, B, C, D     .316, .336, .408,       NA
                                                                                                                     .440, .525, .526,
                                                                                                                     .908(a), (b), .933,
                                                                                                                     .1020.
1-(4-Chlorophenyl)-4,4-dimethyl      B         P         III         NR    Open         Open         A, B, D        .409, .440, .488,       NA
 pentan-3-one.                                                                                                       .908(a), (b).
2- or 3-Chloropropionic acid...      C        S/P        III         NR    Open         Open         A              .238(a), (b), .440,     NA
                                                                                                                     .554, .908(a), (b).
Chlorosulfonic acid............      C        S/P         I         B/3    PV           Closed       NSR            .408, .525, .526,       I-B
                                                                                                                     .527, .554, .555,
                                                                                                                     .602, .933, .1000,
                                                                                                                     .1020, .1045.
o-Chlorotoluene................      A        S/P        III         4m    PV           Restr        A, B, C        .409, .526............  I-D
m-Chlorotoluene................      B        S/P        III         4m    PV           Restr        A, B, C        .409, .526............  I-D
p-Chlorotoluene................      B        S/P         II         4m    PV           Restr        A, B, C        .409, .440, .526,       I-D
                                                                                                                     .908(b).
Chlorotoluenes (mixed isomers).      A        S/P         II         4m    PV           Restr        A, B, C        .409, .526............  I-D
Coal tar.......................      A        S/P         II         4m    PV           Restr        B, D           .409, .933, .1060.....  I-D
Coal tar naphtha solvent.......      B        S/P        III         4m    PV           Restr        A, D           .409, .526, .933,       I-D
                                                                                                                     .1060.
Coal tar pitch (molten)........      D         S         III         4m    PV           Restr        B, D           .252, .409, .933,       I-D
                                                                                                                     .1060.
Cobalt naphthenate in solvent        A        S/P         II         4m    PV           Restr        A, D           .409, .526............  I-D
 naphtha.
Coconut oil, fatty acid........      C         P         III         NR    Open         Open         A              .440, .903, .908(a),    NA
                                                                                                                     (b).
Cottonseed oil, fatty acid.....     [C]        P         III         NR    Open         Open         A              .440, .903, .908(a)...  NA
Creosote (coal tar)............      A        S/P         II         NR    Open         Open         A, B, D        .409..................  I-D
Creosote (wood)................      A        S/P         II         NR    Open         Open         A, B, D        .409..................  NA
Cresols (all isomers)..........      A        S/P         II         NR    Open         Open         A, B           .409, .440, .908(b)...  I-D

[[Page 272]]

 
Cresols with less than 5%
 Phenol, see Cresols (all
 isomers)
Cresols with 5% or more Phenol,
 see Phenol
Cresylate spent caustic              A        S/P         II         NR    Open         Open         NSR            .236(a), (c), .409,     NA
 (mixtures of Cresols and                                                                                            .933.
 Caustic soda solutions).
Cresylic acid, dephenolized....      A        S/P         II         NR    Open         Open         A, B           .409..................  NA
Cresylic acid, sodium salt
 solution, see Cresylate spent
 caustic.
Crotonaldehyde.................      A        S/P         II        B/3    PV           Restr        A              .316, .409, .525,       I-C
                                                                                                                     .526, .527, .1020.
Cumene (isopropylbenzene), see
 Propylbenzene (all isomers).
1,5,9-Cyclododecatriene........      A        S/P         I          4m    PV           Restr        A              .236(b), (c), .408,     I-D
                                                                                                                     .526, .912(a)(1),
                                                                                                                     .1002(a), (b), .1004.
Cycloheptane...................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Cyclohexane....................      C         P         III         4m    PV           Restr        A              .409, .440, .908(b)...  I-D
Cyclohexanone..................      D         S         III         4m    PV           Restr        A              .236(a), (b), .409,     I-D
                                                                                                                     .526.
Cyclohexanone, Cyclohexanol          D         S         III         4m    PV           Restr        A              .236(a), (b), .526....  I-D
 mixture.
Cyclohexyl acetate.............      B         P         III         4m    PV           Restr        A              .409..................  I-D
Cyclohexylamine................      C        S/P        III         4m    PV           Restr        A, C, D        .236(a), (b), (c),      I-D
                                                                                                                     (g), .409, .526.
1,3-Cyclopentadiene dimer            B         P          II         4m    PV           Restr        A              .409, .440, .488,       I-C
 (molten).                                                                                                           .908(a), (b).
Cyclopentane...................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Cyclopentene...................      B         P         III         4m    PV           Restr        A              .409..................  I-D
p-Cymene.......................      C         P         III         4m    PV           Restr        A              .409..................  I-D
iso-Decaldehyde................      @C        P         III         NR    Open         Open         A              None..................  I-C
n-Decaldehyde..................      @B        P         III         NR    Open         Open         A              None..................  I-C
Decanoic acid..................      C         P         III         NR    Open         Open         A              .440, .903, .908(a),    NA
                                                                                                                     (b).
Decene.........................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Decyl acetate..................      B         P         III         NR    Open         Open         A              .409..................  NA
(iso-, n-) Decyl acrylate......      A        S/P         II         NR    Open         Open         A, C, D        .236(a), (b), (c),      I-D
                                                                                                                     .409, .912(a)(1),
                                                                                                                     .1002(a), (b), .1004.
Decyl alcohol (all isomers)....      B         P         III         NR    Open         Open         A              .409, .440, .908(b)...  I-D
Decyloxytetrahydro-thiophene         A        S/P         II        B/3    PV           Restr        A              .409, .526............  NA
 dioxide.
Dibromomethane.................      C        S/P         II         4m    PV           Restr        NSR            .236(a), (b), (d),      NA
                                                                                                                     .408, .525(a), (c),
                                                                                                                     (d), (e), .526, .933,
                                                                                                                     .1020.
Dibutylamine...................      C        S/P        III         4m    PV           Restr        A, B, C, D     .236(b), (c), .409,     I-C
                                                                                                                     .526.
Dibutyl hydrogen phosphonate...      B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
ortho-Dibutyl phthalate........      A         P          II         NR    Open         Open         A              .409..................  I-D
Dichlorobenzene (all isomers)        B        S/P         II         4m    PV           Restr        A, B, D        .236(a), (b), .409,     I-D
 \1\.                                                                                                                .440, .488 \1\, .526,
                                                                                                                     .908(a), (b) \1\.
3,4-Dichloro-1-butene..........      B        S/P        III        B/3    PV           Closed       A, B, C        .316, .409, .525(a),    I-D
                                                                                                                     (c), (d), (e), .526,
                                                                                                                     .527, .933, .1020.
1,1-Dichloroethane.............      D         S         III         4m    PV           Restr        A, B           .409, .526, .527......  I-D
2,2'-Dichloroethyl ether.......      B        S/P         II         4m    PV           Restr        A              .236(a), (b), .409,     I-C
                                                                                                                     .526.
1,6-Dichlorohexane.............      B        S/P         II         4m    PV           Restr        A, B           .409, .526............  NA

[[Page 273]]

 
2,2'-Dichloroisopropyl ether...      C        S/P         II        B/3    PV           Restr        A, B, C, D     .236(a), (b), .316,     I-D
                                                                                                                     .408(a), .440, .525,
                                                                                                                     .526, .1020.
Dichloromethane................      D         S         III         4m    PV           Restr        NSR            .526..................  I-D
2,4-Dichlorophenol \4\.........      A        S/P         II         4m    PV           Restr        A, B, C, D     .236(a), (b), (c),      I-D
                                                                                                                     (g), .409, .440,
                                                                                                                     .500, .501, .526,
                                                                                                                     .908(b), .933.
2,4-Dichlorophenoxyacetic acid,      A        S/P        III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
 diethanolamine salt solution.                                                                                       (g), .409.
2,4-Dichlorophenoxyacetic acid,      A        S/P        III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
 dimethylamine salt solution.                                                                                        (g), .409.
2,4-Dichlorophenoxyacetic acid,      A        S/P        III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
 triisopropanolamine salt                                                                                            (g), .409.
 solution.
1,1-Dichloropropane............      C        S/P         II        B/3    PV           Restr        A, B           .409, .525, .526,       I-D
                                                                                                                     .1020.
1,2-Dichloropropane............      C        S/P         II        B/3    PV           Restr        A, B           .409, .525, .526,       I-D
                                                                                                                     .1020.
1,3-Dichloropropane............      D         S          II        B/3    PV           Restr        A, B           .409, .525, .526,       I-D
                                                                                                                     .1020.
1,3-Dichloropropene............      B        S/P         II        B/3    PV           Closed       A, B           .316, .336, .408,       I-D
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Dichloropropene,                     B        S/P         II        B/3    PV           Closed       A, B, C, D     .316, .336, .408,       I-D
 Dichloropropane mixtures.                                                                                           .526, .527.
2,2-Dichloropropionic acid.....      D         S         III         4m    PV           Restr        A              .238(e), .266, .500,    NA
                                                                                                                     .501, .554, .933.
Diethanolamine.................      D         S         III         NR    Open         Open         A              .236(b), (c)..........  NA
Diethylamine...................      C        S/P        III        B/3    PV           Restr        A              .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .525,
                                                                                                                     .526, .527, .1020.
Diethylaminoethanol, see
 Diethylethanolamine
2,6-Diethylaniline.............      C        S/P        III         NR    Open         Open         B, C, D        .236(b), .409, .440,    NA
                                                                                                                     .908(b).
Diethylbenzene.................      A         P         III         4m    PV           Restr        A              .409..................  I-D
Diethylenetriamine.............      D         S         III         NR    Open         Open         A              .236(b), (c)..........  NA
Diethylethanolamine............      C        S/P        III         4m    PV           Restr        A, C           .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .526.
Diethyl ether, see Ethyl ether
Di-(2-ethylhexyl) phosphoric         C        S/P        III         NR    Open         Open         A, B, C, D     .236(b), (c)..........  I-D
 acid.
Diethyl phthalate..............      C         P         III         NR    Open         Open         A              None..................  I-D
Diethyl sulfate................      B        S/P         II         4m    PV           Closed       A, D           .236(a), (c), (d),      I-D
                                                                                                                     .409, .526, .933.
Diglycidyl ether of Bisphenol A      B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
Diglycidyl ether of Bisphenol F      B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
Di-n-hexyl adipate.............      B         P         III         NR    Open         Open         A              .409..................  NA
Diisobutylamine................      C        S/P         II         4m    PV           Restr        A, B, C, D     .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .525(a),
                                                                                                                     (c), (d), (e), .526,
                                                                                                                     .1020.
Diisobutylcarbinol.............      @C        P         III         NR    Open         Open         A              None..................  I-D
Diisobutylene..................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Diisobutyl phthalate...........      B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  I-D
Diisopropanolamine.............      C        S/P        III         NR    Open         Open         A              .236(b), (c), .440,     I-D
                                                                                                                     .908(a), (b).
Diisopropylamine...............      C        S/P         II        B/3    PV           Closed       A              .236(b), (c), .408,     I-C
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Diisopropylbenzene (all              A         P          II         NR    Open         Open         A              .409..................  I-D
 isomers).
N,N-Dimethylacetamide..........      D         S         III        B/3    PV           Restr        B              .236(b), .316, .525,    I-D
                                                                                                                     .526, .527, .1020.
N,N-Dimethylacetamide solution       D         S         III        B/3    PV           Restr        B              .236(b), .316, .526...  I-D
 (40% or less).
Dimethyl adipate...............      B         P         III         NR    Open         Open         A              .409, .440, .908(b)...  NA
Dimethylamine solution (45% or       C        S/P        III        B/3    PV           Restr        A, C, D        .236(a), (b), (c),      I-C
 less).                                                                                                              (g), .409, .525,
                                                                                                                     .526, .527, .1020.
Dimethylamine solution (over         C        S/P         II        B/3    PV           Closed       A, C, D        .236(a), (b), (c),      I-C
 45% but not over 55%).                                                                                              (g), .316, .408,
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.

[[Page 274]]

 
Dimethylamine solution (over         C        S/P         II        B/3    PV           Closed       A, C, D        .236(a), (b), (c),      I-C
 55% but not over 65%).                                                                                              (g), .316, .372,
                                                                                                                     .408, .525, .526,
                                                                                                                     .527, .1020.
2,6-Dimethylaniline............     [C]       S/P        III         NR    Open         Open         B, C, D        .236(b), .409, .440,    I-D
                                                                                                                     .908(b).
N,N-Dimethylcyclohexylamine....      C        S/P         II        B/3    PV           Restr        A, C           .236(a), (b), (c),      NA
                                                                                                                     (g), .316, .409,
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
N,N-Dimethyldodecylamine.......      A        S/P         I          NR    Open         Open         B              .236(b), .408.........  NA
Dimethylethanolamine...........      D         S         III         4m    PV           Restr        A, D           .236(b), (c), .409,     I-C
                                                                                                                     .526.
Dimethylformamide..............      D         S         III         4m    PV           Restr        A, D           .236(b), .409, .526...  I-D
Dimethyl glutarate.............      C         P         III         NR    Open         Open         A              None..................  NA
Dimethyl hydrogen phosphite....      B        S/P        III         4m    PV           Restr        A, D           .526..................  NA
Dimethyl naphthalene sulfonic       [A]        P         III         NR    Open         Open         NSR            .409..................  NA
 acid, sodium salt solution.
Dimethyloctanoic acid..........      C         P         III         NR    Open         Open         A              .440, .903, .908(b)...  I-D
Dimethyl phthalate.............      C         P         III         NR    Open         Open         A              None..................  I-D
Dimethyl succinate.............      C         P         III         NR    Open         Open         A              .440, .908(b).........  NA
Dinitrotoluene (molten)........      A        S/P         II        B/3    PV           Closed       A              .316, .408, .525,       I-C
                                                                                                                     .526, .527, .1003,
                                                                                                                     .1020.
1,4-Dioxane....................      D         S          II        B/3    PV           Closed       A              .408, .525, .526,       I-C
                                                                                                                     .1020.
Dipentene......................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Diphenyl.......................      A         P          I          NR    Open         Open         B              .408..................  I-D
Diphenylamine (molten).........      B         P         III         NR    Open         Open         B, D           .236(b), .409, .440,    NA
                                                                                                                     .488, .908(b).
Diphenylamines, alkylated......      A         P          II         NR    Open         Open         A              .409..................  NA
Diphenylamine, reaction product      A        S/P         I          NR    Open         Open         A              .408..................  NA
 with 2,2,4-Trimethylpentene.
Diphenyl, Diphenyl ether             A         P          I          NR    Open         Open         B              .408..................  I-D
 mixtures.
Diphenyl ether.................      A         P         III         NR    Open         Open         A              .409..................  I-D
Diphenyl ether, Biphenyl phenyl      A         P         III         NR    Open         Open         A, B           .409..................  NA
 ether mixture.
Diphenylmethane diisocyanate         B        S/P         II        B/3    PV           Closed       A, B, C \6\,   .236(a), (b), .316,     NA
 \6\.                                                                                                 D              .409, .440, .500,
                                                                                                                     .501, .525, .526,
                                                                                                                     .602, .908(a), .1000,
                                                                                                                     .1020.
Diphenylol propane-                  B         P         III         NR    Open         Open         A, B           .409, .440, .908(a)...  NA
 epichlorohydrin resins.
Di-n-propylamine...............      C        S/P        III         4m    PV           Restr        A              .236(b), (c), .409,     I-C
                                                                                                                     .525, .526, .1020.
Dithiocarbamate ester (C7-C35).      A         P          II         NR    Open         Open         A, D           .409..................  NA
Dodecanol......................      B         P         III         NR    Open         Open         A              .409, .440, .488,       I-D
                                                                                                                     .908(a), (b).
Dodecene (all isomers).........      B         P         III         NR    Open         Open         A              .409..................  I-D
Dodecyl alcohol, see Dodecanol.
Dodecylamine, Tetradecylamine        A        S/P         II         4m    PV           Restr        A, D           .236(b), (c), .409,     NA
 mixture.                                                                                                            .526.
Dodecyldimethylamine,                A        S/P         II         NR    Open         Open         B, C, D        .236(b), .409.........  NA
 Tetradecyldimethylamine
 mixture.
Dodecyl diphenyl ether               A        S/P         II         NR    Open         Open         NSR            .409..................  NA
 disulfonate solution.
Dodecyl hydroxypropyl sulfide..      A         P          I          NR    Open         Open         A              .408..................  NA
Dodecyl methacrylate...........     III        S         III         NR    Open         Open         A, C           .236(b), (c),           I-D
                                                                                                                     .912(a)(1), .1004.
Dodecyl-Octadecyl methacrylate       D         S         III         NR    Open         Restr        A, D           .236(b), .912(a)(1),    NA
 mixture.                                                                                                            .1002(a), (b), .1004.

[[Page 275]]

 
Dodecyl-Pentadecyl methacrylate     III        S         III         NR    Open         Open         A, C, D        .912(a)(1), .1002(a),   NA
 mixture.                                                                                                            (b), .1004.
Dodecyl phenol.................      A         P          I          NR    Open         Open         A              .408..................  I-D
Drilling brine (containing Zinc      B         P         III         NR    Open         Open         NSR            .409..................  NA
 salts).
Epichlorohydrin................      A        S/P         II        B/3    PV           Closed       A              .316, .408, .525,       I-C
                                                                                                                     .526, .527, .1020.
Ethanolamine...................      D         S         III         NR    Open         Open         A              .236(b), (c), .526....  I-D
2-Ethoxyethyl acetate..........      C         P         III         4m    PV           Restr        A              .409..................  I-C
Ethyl acrylate.................      A        S/P         II         4m    PV           Restr        A              .409, .526, .527,       I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Ethylamine.....................      C        S/P         II        B/3    PV           Closed       C, D           .236(b), (c), .252,     I-D
                                                                                                                     .372, .409, .525,
                                                                                                                     .526, .527, .1020.
Ethylamine solution (72% or          C        S/P         II        B/3    PV           Closed       A, C           .236(a), (b), (c),      I-D
 less).                                                                                                              (g), .372, .408,
                                                                                                                     .525(a), (c), (d),
                                                                                                                     (e), .526, .527,
                                                                                                                     .1020.
Ethyl amyl ketone..............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Ethylbenzene...................      B         P         III         4m    PV           Restr        A              .409..................  I-D
N-Ethylbutylamine..............      C        S/P        III         4m    PV           Restr        A              .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .525(a),
                                                                                                                     (c), (d), (e), .526,
                                                                                                                     .1020.
Ethyl tert-butyl ether.........      C         P         III         4m    PV           Restr        A              .409..................  I-C
Ethyl butyrate.................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Ethylcyclohexane...............      C         P         III         4m    PV           Restr        A              .409..................  I-D
N-Ethylcyclohexylamine.........      D         S         III         4m    PV           Restr        A, C           .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .526.
S-Ethyl dipropylthiocarbamate..      C         P         III         NR    Open         Open         A              None..................  NA
Ethylene chlorohydrin..........      C        S/P         II        B/3    PV           Closed       A, D           .316, .408, .525,       I-D
                                                                                                                     .526, .527, .933,
                                                                                                                     .1020.
Ethylene cyanohydrin...........      D         S         III         NR    Open         Open         A              None..................  NA
Ethylenediamine................      C        S/P         II         4m    PV           Restr        A              .236(b), (c), .409,     I-D
                                                                                                                     .440, .526, .908(b).
Ethylene dibromide.............      B        S/P         II        B/3    PV           Closed       NSR            .408, .440, .525,       NA
                                                                                                                     .526, .527, .908(b),
                                                                                                                     .1020.
Ethylene dichloride............      B        S/P         II         4m    PV           Restr        A, B           .236(b), .408, .526...  I-D
Ethylene glycol butyl ether          C         P         III         NR    Open         Open         A              None..................  I-C
 acetate.
Ethylene glycol diacetate......      C         P         III         NR    Open         Open         A              None..................  I-D
Ethylene glycol ethyl ether
 acetate, see 2-Ethoxyethyl
 acetate
Ethylene glycol methyl ether         C         P         III         NR    Open         Open         A              None..................  I-C
 acetate.
Ethylene glycol monoalkyl ether      D         S         III         4m    PV           Restr        A              .409..................  I-C
 Including:
 2-Ethoxyethanol
 Ethylene glycol butyl ether
 Ethylene glycol tert-butyl
 ether
 Ethylene glycol ethyl ether
 Ethylene glycol hexyl ether
 Ethylene glycol methyl ether
 Ethylene glycol n-propyl ether
 Ethylene glycol isopropyl
 ether
Ethylene oxide (30% or less),        C        S/P         II        B/3    PV           Closed       A, C           .252, .372, .408,       I-B
 Propylene oxide mixture.                                                                                            .440, .500, .525,
                                                                                                                     .526, .530, .1010,
                                                                                                                     .1011, .1020.
Ethyl ether....................     III        S          II         4m    PV           Closed       A              .236(g), .252, .372,    I-C
                                                                                                                     .408, .440, .500,
                                                                                                                     .515, .526, .527.
Ethyl-3-ethoxypropionate.......      C         P         III         4m    PV           Restr        A              .409..................  NA
2-Ethylhexanol.................      @C        P         III         NR    Open         Open         A              None..................  I-D
2-Ethylhexyl acrylate..........      B        S/P        III         NR    Open         Open         A              .409, .912(a)(1),       I-D
                                                                                                                     .1002(a), (b), .1004.
2-Ethylhexylamine..............      B        S/P         II        B/3    PV           Restr        A              .236(b), (c), .409,     I-D
                                                                                                                     .525, .526, .1020.
Ethyl hexyl phthalate..........      C         P         III         NR    Open         Open         A              None..................  NA
Ethylidene norbornene..........      B        S/P        III        B/3    PV           Restr        A, B, C, D     .236(b), .409, .526...  NA
Ethyl methacrylate.............      D         S         III         4m    PV           Restr        A, B, D        .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.

[[Page 276]]

 
Ethylphenol....................      A        S/P        III         NR    Open         Open         B              .409..................  I-D
2-Ethyl-3-propylacrolein.......      A        S/P        III         4m    PV           Restr        A              .409, .526............  I-C
Ethyl toluene..................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Ferric chloride solutions......      C        S/P        III         NR    Open         Open         NSR            .409, .440, .554,       I-B
                                                                                                                     .555, .908(b), .1045.
Ferric nitrate, Nitric acid          C        S/P         II         4m    PV           Restr        NSR            .408, .526, .527,       I-B
 solution.                                                                                                           .554, .555, .559,
                                                                                                                     .933, .1045.
Fluorosilicic acid (30% or           C        S/P        III        B/3    PV           Restr        NSR            .252, .526, .527,       I-B
 less).                                                                                                              .554, .555, .933,
                                                                                                                     .1045.
Formaldehyde (50% or more),                  S/P        III         4m    PV           Closed       A              .409, .526, .527......  I-B
 Methanol mixtures.
Formaldehyde solution (37% to        C        S/P        III         4m    PV           Restr        A              .409, .440, .526,       I-B
 50%).                                                                                                               .527, .908(b).
Formic acid....................      D         S         III         4m    PV           Restr        A              .238(b), (c), .409,     I-D
                                                                                                                     .526, .527, .554,
                                                                                                                     .933.
Fumaric adduct of rosin, water       B         P         III         NR    Open         Open         NSR            .409, .440, .908(a)...  NA
 dispersion.
Furfural.......................      C        S/P        III         4m    PV           Restr        A              .409, .526............  I-C
Furfuryl alcohol...............      C         P         III         NR    Open         Open         A              None..................  I-C
Glutaraldehyde solution (50% or      D         S         III         NR    Open         Open         NSR            None..................  NA
 less).
Glycidyl ester of C10 Trialkyl
 acetic acid, see Glycidyl
 ester of Tridecyl acetic acid.
Glycidyl ester of Tridecyl           B         P         III         NR    Open         Open         A              .409..................  NA
 acetic acid.
Glyoxylic acid solution (50% or      D         S         III         NR    Open         Open         A, C, D        .238(e), .554(a), (b),  NA
 less).                                                                                                              (c), .933, .1002.
Heptane (all isomers), see           C         P         III         4m    PV           Restr        A              .409..................  I-D
 Alkanes(C6-C9) (all isomers).
Heptanol (all isomers).........      C         P         III         4m    PV           Restr        A              .409..................  I-D
Heptene (all isomers)..........      C         P         III         4m    PV           Restr        A              .409..................  I-D
Heptyl acetate.................      B         P         III         NR    Open         Open         A              .409..................  NA
Hexamethylenediamine (molten)..      C        S/P         II        B/3    PV           Closed       C              .236(a), (b), (c),      NA
                                                                                                                     (g), .316, .336,
                                                                                                                     .409, .440, .525,
                                                                                                                     .526, .527, .908(a),
                                                                                                                     (b), .933, .1020.
Hexamethylenediamine solution..      C        S/P        III         4m    PV           Restr        A              .236(b), (c), .409,     I-D
                                                                                                                     .440, .526, .908(b).
Hexamethylene diisocyanate. \6\      B        S/P         II        B/3    PV           Closed       A, C \6\, D    .238(d), .252, .316,    NA
                                                                                                                     .336, .408, .500,
                                                                                                                     .501, .525, .526,
                                                                                                                     .527, .602, .1000,
                                                                                                                     .1020.
Hexamethyleneimine.............      C        S/P         II         4m    PV           Restr        A, C           .236(a), (b), (c),      I-C
                                                                                                                     (g), .409, .526.
Hexane (all isomers), see            C         P         III         4m    PV           Restr        A              .409..................  I-D
 Alkanes(C6-C9).
Hexene (all isomers)...........      C         P         III         4m    PV           Restr        A              .409..................  I-D
Hexyl acetate..................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Hydrochloric acid..............      D         S         III         4m    PV           Restr        NSR            .252, .526, .527,       I-B
                                                                                                                     .554, .557, .933,
                                                                                                                     .1045, .1052.
Hydrogen peroxide solutions          C        S/P        III        B/3    PV           Closed       NSR            .238(a), (c), .355,     NA
 (over 8% but not over 60%).                                                                                         .409, .440(a)(1)&(2),
                                                                                                                     .500, .933,
                                                                                                                     .1004(a)(2), .1500.
Hydrogen peroxide solutions          C        S/P         II        B/3    PV           Closed       NSR            .238(a), (c), .355,     NA
 (over 60% but not over 70%).                                                                                        .409, .440(a)(1)&(2),
                                                                                                                     .500, .933,
                                                                                                                     .1004(a)(2), .1500.
2-Hydroxyethyl acrylate........      B        S/P         II        B/3    PV           Closed       A              .408, .525, .526,       NA
                                                                                                                     .912(a)(1), .933,
                                                                                                                     .1002(a), (b), .1004,
                                                                                                                     .1020.
N,N-bis(2-Hydroxyethyl)              B         P          II         4m    PV           Restr        A              .409, .440, .488,       NA
 oleamide.                                                                                                           .908(a), (b).

[[Page 277]]

 
2-Hydroxy-4-                         C         P         III         NR    Open         Open         A              .440, .903, .908(a)...  NA
 (methylthio)butanoic acid.
alpha-hydro-omega-
 Hydroxytetradeca(oxytetra
 methylene), see
 Poly(tetramethylene ether)
 glycols (mw 950-1050).
Icosa (oxypropane-2,3-diyl)s...      B         P         III         NR    Open         Open         A              .409, .440, .908(a)...  NA
Isophorone diamine.............      D         S         III         4m    PV           Restr        A              .236(b), (c), .526....  NA
Isophorone diisocyanate \6\....      B        S/P         II        B/3    PV           Closed       A, B, C \6\,   .236(a), (b), .316,     NA
                                                                                                      D              .409, .500, .501,
                                                                                                                     .525, .526, .602,
                                                                                                                     .1000, .1020.
Isoprene.......................      C        S/P        III         4m    PV           Restr        B              .372, .409, .440,       I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Isopropylbenzene, see
 Propylbenzene (all isomers)
Lactonitrile solution (80% or        B        S/P         II        B/3    PV           Closed       A, C, D        .238(d), .252, .316,    I-D
 less).                                                                                                              .336, .408, .440,
                                                                                                                     .525, .526, .527,
                                                                                                                     .908(a), .912(a)(2),
                                                                                                                     .1002, .1004, .1020,
                                                                                                                     .1035.
Lauric acid....................      B         P         III         NR    Open         Open         A              .409, .440, .488,       NA
                                                                                                                     .908(a), (b).
Lauryl polyglucose (50% or
 less), see Alkyl(C12-C14)
 polyglucoside solution (55% or
 less).
Long chain alkaryl polyether         C         P         III         NR    Open         Open         A, B           (.440, .903, .908(a))   NA
 (C11-C20).                                                                                                          \1\.
Long chain polyetheramine in         C         P         III         4m    PV           Restr        A              .409, .440, .903,       I-D
 alkyl(C2-C4)benzenes.                                                                                               .908(a).
Magnesium long chain alkyl           C         P         III         NR    Open         Open         A, B           (.440, .903, .908(a))   NA
 salicylate (C11 + ).                                                                                                \1\.
Maleic anhydride \7\...........      D         S         III         4m    PV           Restr        \7\A, C        None..................  I-D
Mercaptobenzothiazol, sodium
 salt solution, see Sodium-2-
 mercaptobenzothiazol solution
Mesityl oxide..................      D         S         III         4m    PV           Restr        A              .236(b), (c), .409,     I-D
                                                                                                                     .526.
Metam sodium solution..........      A        S/P         II         NR    Open         Open         NSR            .236(a), (b), (c),      NA
                                                                                                                     (g), .409.
Methacrylic acid...............      D         S         III         4m    PV           Restr        A              .238(a), .526,          NA
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     .1004.
Methacrylic resin in Ethylene        B        S/P         II         4m    PV           Restr        A, B           .236(b), .408, .440,    I-D
 dichloride.                                                                                                         .526, .908(a).
Methacrylonitrile..............      D         S          II        B/3    PV           Closed       A              .236(b), .316, .408,    NA
                                                                                                                     .525, .526, .527,
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     .1004, .1020.
N-(2-Methoxy-1-methyl ethyl)-2-
 ethyl-6-methyl
 chloroacetanilide, see
 Metolachlor
Methyl acrylate................      B        S/P         II         4m    PV           Restr        A, B           .409, .526, .527,       I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Methylamine solution (42% or         C        S/P         II        B/3    PV           Closed       A, C, D        .236(a), (b), (c),      I-D
 less).                                                                                                              (g), .316, .408,
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Methylamyl acetate.............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Methylamyl alcohol.............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Methyl butyrate................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Methylcyclohexane..............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Methylcyclopentadiene dimer....      B         P         III         4m    PV           Restr        B              .409..................  I-B
Methyl diethanolamine..........      D         S         III         NR    Open         Open         A              .236(b), (c)..........  I-C
Methylene chloride, see
 Dichloromethane
2-Methyl-6-ethylaniline........      C        S/P        III         NR    Open         Open         A, B, C, D     None..................  NA
2-Methyl-5-ethylpyridine.......      B        S/P        III         NR    Open         Open         A, D           .236(b), .409.........  I-D
Methyl formate.................      D         S          II        B/3    PV           Restr        A              .372, .408, .440,       I-D
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Methyl heptyl ketone...........      B         P         III         4m    PV           Restr        A              .409..................  I-D

[[Page 278]]

 
2-Methyl-2-hydroxy-3-butyne....     III        S         III         4m    PV           Restr        A, B, C, D     .236(b), (d), (f),      I-D
                                                                                                                     (g), .409, .526.
Methyl methacrylate............      D         S          II         4m    PV           Restr        A, B           .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Methyl naphthalene (molten)....      A        S/P         II         4m    PV           Restr        A, D           .409..................  I-D
2-Methyl-1-pentene (Hexene (all
 isomers)), see Alkanes(C6-C9).
4-Methyl-1-pentene (Hexene (all
 isomers)), see Alkanes(C6-C9).
Methyl tert-pentyl ether, see
 tert-Amyl methyl ether.
2-Methylpyridine...............      D         S          II        B/3    PV           Closed       A, C           .236(b), .408,          I-D
                                                                                                                     .525(a), (c), (d),
                                                                                                                     (e), .1020.
3-Methylpyridine...............      C        S/P         II        B/3    PV           Closed       A, C           .236(b), .408,          I-D
                                                                                                                     .525(a), (c), (d),
                                                                                                                     (e), .1020.
4-Methylpyridine...............      D         S          II        B/3    PV           Closed       A, C, D        .236(b), .408, .440,    I-D
                                                                                                                     .525(a), (c), (d),
                                                                                                                     (e), .526, .908(b),
                                                                                                                     .1020.
Methyl salicylate..............      B         P         III         NR    Open         Open         A              .409..................  I-D
alpha-Methylstyrene............      A        S/P        III         4m    PV           Restr        A, D           .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
3-(Methylthio) propionaldehyde.      B        S/P        III        B/3    PV           Closed       B, C           .238(e), .316, .408,    NA
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Metolachlor....................      B         P         III         NR    Open         Open         A              .409..................  NA
Morpholine.....................      D         S         III         4m    PV           Restr        A              .236(b), (c), .409....  I-C
Motor fuel anti-knock compounds      A        S/P         I         B/3    PV           Closed       A, B, C        .252, .316, .336,       I-D
 (containing lead alkyls).                                                                                           .408, .525, .526,
                                                                                                                     .527, .933, .1020,
                                                                                                                     .1025.
Naphthalene (molten)...........      A        S/P         II         4m    PV           Restr        A, D           .409, .440, .908(b)...  I-D
Naphthalene sulfonic acid,          [A]        P         III         NR    Open         Open         NSR            .409..................  NA
 sodium salt solution (40% or
 less).
Naphthenic acid................      A         P          II         NR    Open         Open         A              .409..................  NA
Naphthenic acid, sodium salt        [A]        P          II         NR    Open         Open         NSR            .409..................  NA
 solution.
Neodecanoic acid...............      C         P         III         NR    Open         Open         A              None..................  NA
Nitrating acid (mixture of           C        S/P         II        B/3    PV           Closed       NSR            .316, .408, .526,       I-B
 sulfuric and nitric acids).                                                                                         .527, .554, .555,
                                                                                                                     .556, .559, .602,
                                                                                                                     .933, .1000, .1045.
Nitric acid (70% or less)......      C        S/P         II         4m    PV           Restr        NSR            .408, .526, .527,       I-B
                                                                                                                     .554, .555, .559,
                                                                                                                     .933, .1045.
Nitrobenzene...................      B        S/P         II        B/3    PV           Closed       A, D           .316, .336, .408,       I-D
                                                                                                                     .440, .525, .526,
                                                                                                                     .908(b), .933, .1020.
Nitroethane \7\................      D         S         III         4m    PV           Restr        \7\A, C        .236(b), .409, .526,    I-C
                                                                                                                     .1002(a), (b), .1003.
Nitroethane, 1-Nitropropane          D         S         III         4m    PV           Restr        \7\A           .236(b), .409, .526,    I-C
 (each 15% or more) mixture \7\.                                                                                     .1002.
o-Nitrophenol (molten).........      B        S/P         II        B/3    PV           Closed       A, C, D        .409, .440, .525,       NA
                                                                                                                     .526, .908(a), (b),
                                                                                                                     .1020.
1- or 2-Nitropropane \7\.......      D         S         III         4m    PV           Restr        \7\A, C        .409, .526............  I-C
Nitropropane (60%), Nitroethane      D         S         III         4m    PV           Restr        \7\A, C        .236(b), .409, .526...  I-C
 (40%) mixture \7\.
Nitropropane (20%), Nitroethane      D         S         III         4m    PV           Restr        \7\A, C        .236(b), .409, .526,    I-C
 (80%) mixture \7\.                                                                                                  .1002(a), (b), .1003.
(o-, p-) Nitrotoluene..........      B        S/P         II        B/3    PV           Closed       A, B           .316, .408, .440,       I-D
                                                                                                                     .525, .526, .908(b),
                                                                                                                     .1020.

[[Page 279]]

 
Nonane (all isomers), see            C         P         III         4m    PV           Restr        B, C           .409..................  I-D
 Alkanes(C6-C9).
Nonene (all isomers)...........      B         P         III         4m    PV           Restr        A              .409..................  I-D
Nonyl acetate..................      C         P         III         NR    Open         Open         A              .409..................  I-D
Nonyl alcohol (all isomers)....      C         P         III         NR    Open         Open         A              None..................  I-D
Nonyl phenol...................      A         P          II         NR    Open         Open         A              .409..................  I-D
Nonyl phenol poly(4 +                B         P         III         NR    Open         Open         A              .409, .440, .488 \1\,   I-D
 )ethoxylates.                                                                                                       .908(a), (b).
Noxious liquid, N.F., (1)            A         P          I          NR    Open         Open         A              .408..................  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 1, Cat A.
Noxious liquid, F., (2) n.o.s.       A         P          I          4m    PV           Restr        A              .408..................  NA
 (``trade name'' contains
 ``principal components'') ST
 1, Cat A.
Noxious liquid, N.F., (3)            A         P          II         NR    Open         Open         A              .409..................  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 2, Cat A.
Noxious liquid, F., (4) n.o.s.       A         P          II         4m    PV           Restr        A              .409..................  NA
 (``trade name'' contains
 ``principal components'') ST
 2, Cat A.
Noxious liquid, N.F., (5)            B         P          II         NR    Open         Open         A              .409; (.440, .908) \1\  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 2, Cat B.
Noxious liquid, N.F., (6)            B         P          II         NR    Open         Open         A              .409, .440, .488,       NA
 n.o.s. (``trade name''                                                                                              .908(b); (.908(a))
 contains ``principal                                                                                                \1\.
 components'') ST 2, Cat B, mp.
 equal to or greater than 15
 deg. C.
Noxious liquid, F., (7) n.o.s.       B         P          II         4m    PV           Restr        A              .409; (.440, .908) \1\  NA
 (``trade name'' contains
 ``principal components'') ST
 2, Cat B.
Noxious liquid, F., (8) n.o.s.       B         P          II         4m    PV           Restr        A              .409, .440, .488,       NA
 (``trade name'' contains                                                                                            .908(b); (.908(a))
 ``principal components'') ST                                                                                        \1\.
 2, Cat B, mp. equal to or
 greater than 15 deg. C.
Noxious liquid, N.F., (9)            A         P         III         NR    Open         Open         A              .409..................  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 3, Cat A.
Noxious liquid, F., (10) n.o.s.      A         P         III         4m    PV           Restr        A              .409..................  NA
 (``trade name'' contains
 ``principal components'') ST
 3, Cat A.
Noxious liquid, N.F., (11)           B         P         III         NR    Open         Open         A              (.409, .440, .908) \1\  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 3, Cat B.
Noxious liquid, N.F., (12)           B         P         III         NR    Open         Open         A              .409, .440, .488,       NA
 n.o.s. (``trade name''                                                                                              .908(b); (.908(a))
 contains ``principal                                                                                                \1\.
 components'') ST 3, Cat B, mp.
 equal to or greater than 15
 deg. C.
Noxious liquid, F., (13) n.o.s.      B         P         III         4m    PV           Restr        A              .409; (.440, .908) \1\  NA
 (``trade name'' contains
 ``principal components'') ST
 3, Cat B.

[[Page 280]]

 
Noxious liquid, F., (14) n.o.s.      B         P         III         4m    PV           Restr        A              .409, .440, .488,       NA
 (``trade name'' contains                                                                                            .908(b); (.908(a))
 ``principal components'') ST                                                                                        \1\.
 3, Cat B, mp. equal to or
 greater than 15 deg. C.
Noxious liquid, N.F., (15)           C         P         III         NR    Open         Open         A              (.440, .903, .908) \1\  NA
 n.o.s. (``trade name''
 contains ``principal
 components'') ST 3, Cat C.
Noxious liquid, F., (16) n.o.s.      C         P         III         4m    PV           Restr        A              (.440, .903, .908) \1\  NA
 (``trade name'' contains
 ``principal components'') ST
 3, Cat C.
Octane (all isomers), see            C         P         III         4m    PV           Restr        A              .409..................  I-D
 Alkanes(C6-C9).
Octanol (all isomers)..........      C         P         III         NR    Open         Open         A              None..................  I-D
Octene (all isomers)...........      B         P         III         4m    PV           Restr        A              .409..................  I-D
Octyl acetate..................      C         P         III         NR    Open         Open         A              None..................  I-D
Octyl aldehydes................      B         P         III         4m    PV           Restr        A              .409, .440, .908(b)...  I-C
Octyl nitrates (all isomers),
 see Alkyl(C7-C9) nitrates.
Olefin mixtures (C5-C7)........      C         P         III         4m    PV           Restr        A              .409..................  I-D
Olefin mixtures (C5-C15).......      B         P         III         4m    PV           Restr        A              .409..................  I-D
alpha-Olefins (C6-C18) mixtures      B         P         III         4m    PV           Restr        A              .409, .440, .908(a),    I-D
                                                                                                                     (b).
Oleum..........................      C        S/P         II        B/3    PV           Closed       NSR            .316, .408, .440,       I-B
                                                                                                                     .526, .527, .554,
                                                                                                                     .555, .556, .602,
                                                                                                                     .908(a), .933, .1000,
                                                                                                                     .1045, .1052.
Oleylamine.....................      A        S/P         II         4m    PV           Restr        A              .409, .526............  NA
Palm kernel acid oil...........      C         P         III         NR    Open         Open         A, B           .440, .903, .908(a),    NA
                                                                                                                     (b).
Paraldehyde....................      C        S/P        III         4m    PV           Restr        A              .409, .440, .908(b)...  I-C
Paraldehyde-ammonia reaction         C        S/P         II        B/3    PV           Closed       A              .236 (a), (b), (c),     NA
 product.                                                                                                            (g), .525(a), (c),
                                                                                                                     (e), .408, .526,
                                                                                                                     .1020.
Pentachloroethane..............      B        S/P         II        B/3    PV           Restr        NSR            .316, .409, .525,       NA
                                                                                                                     .526, .1020.
1,3-Pentadiene.................      C        S/P        III         4m    PV           Restr        A, B           .409, .526,             I-D
                                                                                                                     .912(a)(1), .1002,
                                                                                                                     .1004.
Pentane (all isomers)..........      C         P         III         4m    PV           Restr        A              .372, .409............  I-D
n-Pentanoic acid (64%), 2-           D         S          II        B/3    Open         Closed       A, D           .238(a), .408,          I-D
 Methyl butyric acid (36%)                                                                                           .525(a), (c), (e),
 mixture.                                                                                                            .554, .933, .1020.
Pentene (all isomers)..........      C         P         III         4m    PV           Restr        A              .409..................  I-D
n-Pentyl propionate............      C         P         III         4m    PV           Restr        A              .409..................  I-D
Perchloroethylene..............      B        S/P        III        B/3    PV           Restr        NSR            .409, .526............  NA
Phenol (or solutions with 5% or      C        S/P         II        B/3    PV           Closed       A              .408, .440, .488,       I-D
 more Phenol).                                                                                                       .525, .526, .908(a),
                                                                                                                     (b), .933, .1020.
1-Phenyl-l-xylyl ethane........      C         P         III         NR    Open         Open         A, B           None..................  NA
Phosphate esters, alkyl(C12-         B         P         III         4m    PV           Restr        A              .409..................  NA
 C14)amine.
Phosphoric acid................      D         S         III         NR    Open         Open         NSR            .554, .555, .558,       I-B
                                                                                                                     .1045, .1052, .933.
Phthalic anhydride (molten)....      C        S/P        III         4m    PV           Restr        A, D           .440, .908(a), (b)....  I-D
Pinene, see the alpha- or beta-
 isomers.
alpha-Pinene...................      A         P         III         4m    PV           Restr        A              .409..................  I-D

[[Page 281]]

 
beta-Pinene....................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Pine oil.......................      C         P         III         NR    Open         Open         A              .440, .908(a).........  I-D
Polyalkyl(C18-C22) acrylate in       C         P         III         4m    PV           Restr        A              .409, .440, .903,       NA
 Xylene.                                                                                                             .908(a).
Polyalkylene oxide polyol......      C         P         III         NR    Open         Open         A              .440, .903, .908(a)...  NA
Poly(2 + )cyclic aromatics.....      A         P          II         4m    PV           Restr        A, D           .409..................  I-D
Polyethylene polyamines........      C        S/P        III         NR    Open         Open         A              .236(b), (c), .400,     NA
                                                                                                                     .440, .908(b).
Polyferric sulfate solution....      C        S/P        III         NR    Open         Open         NSR            .238(d)...............  NA
Polyisobutenamine in aliphatic       C         P         III         NR    Open         Open         A              .903..................  NA
 (C10-C14) solvent.
Polymethylene polyphenyl             D         S          II        B/3    PV           Closed       A, C \6\, D    .236(a), (b), .409,     NA
 isocyanate \6\.                                                                                                     .500, .501, .525,
                                                                                                                     .526, .602, .1000,
                                                                                                                     .1020.
Polyolefinamine (C28-C250).....      C         P         III         NR    Open         Open         A              None..................  NA
Polyolefinamine in alkyl(C2-         C         P         III         4m    PV           Restr        A              .409, .440, .903,       I-D
 C4)benzenes.                                                                                                        .908(a).
Polyolefin phosphorosulfide,         C         P         III         NR    Open         Open         A, B           (.440, .903, .908(a))   NA
 barium derivative (C28-C250).                                                                                       \1\.
Poly(tetramethylene ether)           B         P         III         NR    Open         Open         A, D           .409, .440, .488,       NA
 glycols (mw 950-1050).                                                                                              .908(a), (b).
Potassium hydroxide solution,
 see Caustic potash solution
Potassium oleate...............      C         P         III         NR    Open         Open         A              .409..................  NA
Potassium thiosulfate (50% or        C         P         III         NR    Open         Open         NSR            None..................  NA
 less).
iso-Propanolamine..............      C        S/P        III         NR    Open         Open         A              .236(b), (c), .440,     I-D
                                                                                                                     .526, .903, .908(b).
n-Propanolamine................      C        S/P        III         NR    Open         Open         A, D           .236(b), (c), .440,     NA
                                                                                                                     .526, .908(b).
Propionaldehyde................      C        S/P        III         4m    PV           Restr        A              .316, .409, .526, .527  I-C
Propionic acid.................      D         S         III         4m    PV           Restr        A              .238(a), .409, .527,    I-D
                                                                                                                     .554, .933.
Propionic anhydride............      C        S/P        III         4m    PV           Restr        A              .238(a), .526.........  I-D
Propionitrile..................      C        S/P         II        B/3    PV           Closed       A, D           .252, .316, .336,       I-D
                                                                                                                     .408, .525, .526,
                                                                                                                     .527, .1020.
iso-Propylamine................      C        S/P         II        B/3    PV           Closed       C, D           .236(b), (c), .372,     I-D
                                                                                                                     .408, .440, .525,
                                                                                                                     .526, .527, .1020.
iso-Propylamine solution (70%        C        S/P         II        B/3    PV           Closed       C, D           .236(a), (b), (c),      I-D
 or less).                                                                                                           (g), .408, .440,
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
n-Propylamine..................      C        S/P         II        B/3    PV           Closed       A, C, D        .236(b), (c), .408,     I-D
                                                                                                                     .500, .525, .526,
                                                                                                                     .527, .1020.
n-Propylbenzene, see
 Propylbenzene (all isomers).
Propylbenzene (all isomers)....      A         P         III         4m    PV           Restr        A              .409..................  I-D
n-Propyl chloride..............      D         S         III         4m    PV           Restr        A, B           .409..................  I-D
iso-Propylcyclohexane..........      C         P         III         4m    PV           Restr        A              .409, .440, .903,       I-D
                                                                                                                     .908(a).
Propylene dimer................      C         P         III         4m    PV           Restr        A              .409..................  NA
Propylene oxide................      C        S/P         II        B/3    PV           Closed       A, C           .372, .408, .440,       I-B
                                                                                                                     .500, .526, .530,
                                                                                                                     .1010, .1011.
Propylene tetramer.............      B         P         III         4m    PV           Restr        A              .409..................  I-D
Propylene trimer...............      B         P         III         4m    PV           Restr        A              .409..................  I-D
iso-Propyl ether...............      D         S         III         4m    PV           Restr        A              .409, .500, .515,       I-D
                                                                                                                     .912(a)(1).
Pyridine.......................      D         S         III         4m    PV           Restr        A              .236(b), .409.........  I-D
Rosin, see Rosin oil...........
Rosin oil......................      B         P         III         NR    Open         Open         A              .409, .440, .488,       I-D
                                                                                                                     .908(a), (b).
Rosin soap (disproportionated)       B         P         III         NR    Open         Open         A              .409..................  NA
 solution.
Sodium alkyl (C14-C17)
 sulfonates 60-65% solution,
 see Alkane (C14-C17) sulfonic
 acid, sodium salt solution.
Sodium aluminate solution......      D         S         III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
                                                                                                                     (g), .933.
Sodium borohydride (15% or           C        S/P        III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
 less), Sodium hydroxide                                                                                             (g), .440, .908(a),
 solution.                                                                                                           .933.

[[Page 282]]

 
Sodium chlorate solution (50%       III        S         III         NR    Open         Open         NSR            .409, .933, .1065.....  NA
 or less).
Sodium dichromate solution (70%      C        S/P         II        B/3    Open         Closed       NSR            .236(b), (c), .408,     NA
 or less).                                                                                                           .525, .933, .1020.
Sodium dimethyl naphthalene
 sulfonate solution, see
 Dimethyl naphthalene sulfonic
 acid, sodium salt solution.
Sodium hydrogen sulfide (6% or       B         P         III         NR    Open         Open         NSR            .409..................  NA
 less), Sodium carbonate (3% or
 less) solution.
Sodium hydrogen sulfite              D         S         III         NR    Open         Open         NSR            None..................  NA
 solution (45% or less).
Sodium hydrosulfide solution         B        S/P        III         4m    PV           Restr        NSR            .409, .440, .526,       NA
 (45% or less).                                                                                                      .908(b), .933.
Sodium hydrosulfide, Ammonium        B        S/P         II        B/3    PV           Closed       A, C           .236(a), (b), (c),      NA
 sulfide solution.                                                                                                   (g), .316, .372,
                                                                                                                     .408, .525, .526,
                                                                                                                     .527, .933, .1002,
                                                                                                                     .1020.
Sodium hydroxide solution, see
 Caustic soda solution
Sodium hypochlorite solution         C        S/P        III         4m    PV           Restr        NSR            .236(a), (b), .933....  NA
 (15% or less).
Sodium long chain alkyl             [C]        P         III         NR    Open         Open         A              (.440, .903, .908(a))   NA
 salicylate (C13 + ).                                                                                                \1\.
Sodium-2-mercaptobenzothiazol        B        S/P        III         NR    Open         Open         NSR            .236(a), (b), (c),      NA
 solution.                                                                                                           (g), .409, .440,
                                                                                                                     .908(b), .933.
Sodium N-methyldithiocarbamate
 solution, see Metam sodium
 solution.
Sodium naphthalene sulfonate
 solution (40% or less), see
 Naphthalene sulfonic acid,
 sodium salt solution (40% or
 less).
Sodium naphthenate solution,
 see Naphthenic acid, sodium
 salt solution.
Sodium nitrite solution........      B        S/P         II         NR    Open         Open         NSR            .408, .525(a), (c),     NA
                                                                                                                     (d), (e), .1020.
Sodium petroleum sulfonate.....      B        S/P         II         NR    Open         Open         A              .409, .440, .908(a)...  NA
Sodium silicate solution.......      C         P         III         NR    Open         Open         A              None..................  NA
Sodium sulfide solution (15% or      B        S/P        III        B/3    PV           Closed       NSR            .236(a), (b), .409,     NA
 less).                                                                                                              .440, .526, .908(b).
Sodium sulfite solution (25% or      C         P         III         NR    Open         Open         NSR            .409, .440, .908(b)...  NA
 less).
Sodium tartrates, Sodium             D         S         III         NR    Open         Open         A, B           .238(e)...............  NA
 succinates solution.
Sodium thiocyanate solution          B         P         III         NR    Open         Open         NSR            .238(a), .409.........  NA
 (56% or less).
Styrene monomer................      B        S/P        III         4m    PV           Restr        A, B           .236(b), .409,          I-D
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Sulfohydrocarbon, long chain         B         P         III         NR    Open         Open         A, B           .409; (.440, .908(a))   NA
 (C18 + ) alkylamine mixture.                                                                                        \1\.
Sulfur (molten)................     III        S         III         NR    Open         Open         NSR            .252, .440, .526, .545  I-C
Sulfuric acid..................      C        S/P        III         NR    Open         Open         NSR            .440, .554, .555,       I-B
                                                                                                                     .556, .602, .908(a),
                                                                                                                     (b), .933, .1000,
                                                                                                                     .1045, .1046, .1052.
Tall oil (crude and distilled).      B         P         III         NR    Open         Open         A              .409, .440, .488,       NA
                                                                                                                     .908(a), (b).

[[Page 283]]

 
Tall oil, fatty acid (resin          C         P         III         NR    Open         Open         A              .440, .908(a), (b)....  NA
 acids less than 20%).
Tall oil fatty acid, barium          B        S/P        III         NR    Open         Open         A              .409, .440, .908(a)...  NA
 salt.
Tall oil soap                        B         P         III         NR    Open         Open         A              .409, .440, .908(a),    NA
 (disproportionated) solution.                                                                                       (b).
1,1,2,2-Tetrachloroethane......      B        S/P        III        B/3    PV           Restr        NSR            .316, .409, .525,       NA
                                                                                                                     .526, .1020.
Tetraethylenepentamine \3\.....      D         S         III         NR    Open         Open         A              .236(b), (c), (g).....  I-C
Tetrahydrofuran................      D         S         III         4m    PV           Restr        A, D           .409, .526,             I-C
                                                                                                                     .912(a)(2), .1004.
Tetrahydronaphthalene..........      C         P         III         NR    Open         Open         A              None..................  I-D
Tetramethylbenzene (all              A         P         III         NR    Open         Open         A              None..................  I-D
 isomers).
Toluene........................      C         P         III         4m    PV           Restr        A              .409..................  I-D
Toluenediamine.................      C        S/P         II        B/3    PV           Closed       A, B, C, D     .236(a), (b), (c),      NA
                                                                                                                     (g), .316, .408,
                                                                                                                     .440, .525, .526,
                                                                                                                     .527, .908(a), (b),
                                                                                                                     .933, .1020.
Toluene diisocyanate \6\.......      C        S/P         II         4m    PV           Closed       A, C \6\, D    .236(b), .316, .408,    I-D
                                                                                                                     .440, .500, .501,
                                                                                                                     .525, .526, .527,
                                                                                                                     .602, .908(b), .1000,
                                                                                                                     .1020.
o-Toluidine....................      C        S/P         II        B/3    PV           Closed       A, C           .316, .408, .525,       I-D
                                                                                                                     .526, .933, .1020.
Tributyl phosphate.............      B         P         III         NR    Open         Open         A              .409..................  I-D
1,2,3-Trichlorobenzene (molten)      A        S/P         I         B/3    PV           Closed       A, C, D        .316, .408, .440,       I-D
                                                                                                                     .526, .908(b), .933.
1,2,4-Trichlorobenzene.........      B        S/P         II         4m    PV           Restr        A, B,C,        .409, .440, .526,       I-D
                                                                                                                     .908(b),.
1,1,1-Trichloroethane..........      C         P         III         NR    Open         Open         A              .409..................  I-D
1,1,2-Trichloroethane..........      C        S/P        III        B/3    PV           Restr        NSR            .409, .525, .526,       I-D
                                                                                                                     .933, .1020.
Trichloroethylene..............      C        S/P        III        B/3    PV           Restr        NSR            .316, .409, .525,       I-D
                                                                                                                     .526, .1020.
1,2,3-Trichloropropane.........      C        S/P         II        B/3    PV           Closed       A, B, C, D     .316, .408, .525,       I-D
                                                                                                                     .526, .933, .1020.
1,1,2-Trichloro-1,2,2-               C         P         III         NR    Open         Open         NSR            None..................  NA
 trifluoroethane.
Tricresyl phosphate (less than       A         P          II         NR    Open         Open         A              .409..................  I-D
 1% of the ortho isomer).
Tricresyl phosphate (1% or more      A        S/P         I          4m    PV           Closed       A, B           .408, .525(a), (c),     I-D
 of the ortho isomer).                                                                                               (d), (e), .1020.
Tridecanoic acid...............      B         P         III         NR    Open         Open         A              .409, .440, .488,       NA
                                                                                                                     .908(a), (b).
Triethanolamine................      D         S         III         NR    Open         Open         A              .236(a), (b), (c), (g)  I-C
Triethylamine..................      C        S/P         II        B/3    PV           Restr        A, B, C        .236(b), (c), .409,     I-C
                                                                                                                     .525, .526, .527,
                                                                                                                     .1020.
Triethylbenzene................      A         P          II         NR    Open         Open         A              .409..................  I-D
Triethylene glycol di-(2-           [C]        P         III         NR    Open         Open         A              None..................  I-C
 ethylbutyrate).
Triethylenetetramine...........      D         S         III         NR    Open         Open         A              .236(a), (b), (c).....  I-C
Triethyl phosphite.............      B        S/P        III        B/3    PV           Restr        A, B, D        .409, .526............  NA
Triisopropylated phenyl              A         P          II         NR    Open         Open         A              .409..................  NA
 phosphates.
Trimethylacetic acid...........      D         S         III         4m    PV           Restr        A, C           .238(a), .266, .554...  I-D
Trimethylamine solution (30% or      C        S/P         II        B/3    PV           Closed       A, C           .236(a), (b), (c),      I-C
 less).                                                                                                              (g), .372, .408,
                                                                                                                     .440, .525, .526,
                                                                                                                     .527, .908(b), .1020.
Trimethylbenzene (all isomers).      A         P         III         4m    PV           Restr        A              .409..................  I-D
Trimethylhexamethylenediamine        D         S         III         NR    Open         Open         A, C           .236(a), (b), (c),      NA
 (2,2,4- and 2,4,4- isomers).                                                                                        (g), .409.
Trimethylhexamethylene               B        S/P         II        B/3    PV           Closed       A, C \6\       .316, .409, .500,       NA
 diisocyanate (2,2,4- and 2,4,4-                                                                                     .501, .525, .526,
  isomers) \6\.                                                                                                      .602, .1000, .1020.
2,2,4-Trimethyl-1,3-pentanediol-     C         P         III         NR    Open         Open         A              None..................  I-D
 1-isobutyrate.
Trimethyl phosphite............               S         III         4m    PV           Restr        A, D           .409, .526, .602,       I-D
                                                                                                                     .1000.
1,3,5-Trioxane.................      D         S         III         4m    PV           Restr        A, D           .409..................  I-C
Trixylenyl phosphate...........      A         P          I          NR    Open         Open         A              .408..................  NA

[[Page 284]]

 
Trixylyl phosphate, see
 Trixylenyl phosphate.
Turpentine.....................      B         P         III         4m    PV           Restr        A              .409..................  I-D
Undecanoic acid................      B         P         III         NR    Open         Open         A              .440, .908(a), (b)....  NA
1-Undecene.....................      B         P         III         NR    Open         Open         A              .409..................  I-D
1- Undecyl alcohol.............      B         P         III         NR    Open         Open         A              .409, .440, .908(b)...  I-D
Urea, Ammonium nitrate solution      C        S/P        III         4m    PV           Restr        A              .236(b), .526.........  I-D
 (containing more than 2% NH3).
Valeraldehyde (all isomers)....      C        S/P        III         4m    PV           Restr        A              .409, .500, .526......  I-C
Vinyl acetate..................      C        S/P        III         4m    PV           Restr        A              .409, .912(a)(1),       I-D
                                                                                                                     .1002(a), (b), .1004.
Vinyl ethyl ether..............      C        S/P         II         4m    PV           Closed       A              .236(b), (d), (f),      I-C
                                                                                                                     (g), .252, .372,
                                                                                                                     .408, .440, .500,
                                                                                                                     .515, .526, .527,
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Vinylidene chloride............      D         S          II         4m    PV           Restr        B              .236(a), (b), .372,     I-D
                                                                                                                     .409, .440, .500,
                                                                                                                     .526, .527,
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
Vinyl neodecanate..............      B        S/P        III         NR    Open         Open         A, B           .409, .912(a)(1),       NA
                                                                                                                     .1002(a), (b), .1004.
Vinyltoluene...................      A        S/P        III         4m    PV           Restr        A, B, D        .236(a), (b), (c),      I-D
                                                                                                                     (g), .409,
                                                                                                                     .912(a)(1), .1002(a),
                                                                                                                     (b), .1004.
White spirit (low (15-20%)           B         P          II         4m    PV           Restr        A              .409..................  NA
 aromatic).
Xylenes \8\ (ortho-, meta-,          C         P         III         4m    PV           Restr        A              .409, .440, .908(b)     I-D
 para-).                                                                                                             \8\.
Xylenes, Ethylbenzene (10% or        B         P         III         4m    PV           Restr        A              .409..................  NA
 more) mixture.
Xylenol........................      B        S/P        III         NR    Open         Open         A, B           .409, .440, .908(a),    NA
                                                                                                                     (b).
Zinc alkaryl dithiophosphate         C         P         III         NR    Open         Open         A, B           (.440, .903, .908(a))   NA
 (C7-C16).                                                                                                           \1\.
Zinc alkyl dithiophosphate (C3-      B         P         III         NR    Open         Open         A, B           .409; (.440, .908(a))   NA
 C14).                                                                                                               \1\.
--------------------------------------------------------------------------------------------------------------------------------------------------------
Column Heading Footnotes:
a. The cargo name must be as it appears in this column (see 153.900, 153.907). Words in italics are not part of the cargo name but may be used in
  addition to the cargo name. When one entry references another entry by use of the word ``see'', and both names are in roman type, either name may be
  used as the cargo name (e.g., Diethyl ether, see Ethyl ether). However, the referenced entry is preferred.
The provisions contained in 46 CFR part 197, subpart C, apply to liquid cargoes containing 0.5% or more benzene by volume.
b. This column lists the IMO Annex II Pollution Category.
 A, B, C, D--NLS Category of Annex II of MARPOL 73/78.
 III--Appendix III of Annex II (non-NLS cargoes) of MARPOL 73/78.
 --No determination of NLS status. For shipping on an oceangoing vessel, see 46 CFR 153.900(c).
 [ ]--A NLS category in brackets indicates that the product is provisionally categorized and that further data are necessary to complete the evaluation
  of its pollution hazards. Until the hazard evaluation is completed, the pollution category assigned is used.
 @--The NLS category has been assigned by the U.S. Coast Guard, in absence of one assigned by the IMO. The category is based upon a GESAMP Hazard
  Profile or by analogy to a closely related product having an NLS assigned.
c. This column lists the hazard(s) of the commodity:
 S--The commodity is included because of its safety hazards.
 P--The commodity is included because of its pollution hazards.
 S/P--The commodity is included because of both its safety and pollution hazards.
d. This column lists the type of containment system the cargo must have (see 153.230 through 153.232).
e. This column lists the height of any vent riser required (see 153.350 and 153.351).
f. This column lists any vent control valve required (see 153.355).
g. This column lists the type of gauging system required (see 153.400 through 153.406).

[[Page 285]]

 
h. This column lists the type of fire protection system required. Where more than one system is listed, any listed system may be used. A dry chemical
  system may not be substituted for either type of foam system unless the dry chemical system is listed as an alternative or the substitution is
  approved by Commandant (CG-ENG) (telephone number 202-372-1420) (see 153.460). The types are as follows:
 A is a foam system for water soluble cargoes (polar solvent foam).
 B is a foam system for water insoluble cargoes (non-polar solvent foam).
 C is a water spray system.
 D is a dry chemical system.
 NSR means there is no special requirement applying to fire protection systems.
i. This column lists sections that apply to the cargo in addition to the general requirements of this part. The 153 Part number is omitted.
j. This column lists the electrical hazard class and group used for the cargo when determining requirements for electrical equipment under Subchapter J
  (Electrical Engineering) of this chapter.
A number of electrical hazard class and group assignments are based upon that which appears in ``Classification of Gases, Liquids and Volatile Solids
  Relative to Explosion-Proof Electrical Equipment'', Publication NMAB 353-5, National Academy Press, 1982, when not appearing in NFPA 497M, ``Manual
  for Classification of Gases, Vapors and Dusts for Electrical Equipment in Hazardous (Classified) Locations.''
The I-B electrical hazard does not apply to weather deck locations (see 46 CFR Part 111) for inorganic acids: Chlorosulfonic acid; Hydrochloric acid;
  Nitrating acid; Nitric acid (70% or less); Oleum; Phosphoric acid; Sulfuric acid.
Abbreviations used in the Table:
 NR--No requirement.
 NA--Not applicable.
Abbreviations for Noxious Liquid cargoes:
 N.F.--non-flammable (flash point greater than 60 deg C (140 deg F) closed cup (cc)).
 F.--flammable (flash point less than or equal to 60 deg C (140 deg F) closed cup (cc)).
 n.o.s.--not otherwise specified.
 ST--Ship type.
 Cat--Pollution category.
Footnotes for Specific Cargoes:
1. Special applicability:
 153.440 and .908(a) apply to the chemical, and mixtures containing the chemical, with a viscosity of 25 mPa.s at 20 deg C (68 deg F).
 153.440 and .908(b) apply to the chemical, and mixtures containing the chemical, with a melting point of 0 deg C (32 deg F) and above.
 153.488 applies to the chemical, and mixtures containing the chemical, with a melting point of 15 deg C (59 deg F) and above.
2. Benzene containing cargoes.
 Applies to mixtures containing no other components with safety hazards and where the pollution category is C or less.
3. Diammonium salt of Zinc ethylenediaminetetraacetic acid solution; Tetraethylenepentamine.
 Aluminum is a questionable material of construction with this cargo since pitting and corrosion has been reported. The IMO Chemical Code prohibits
  aluminum as a material of construction for this cargo.
4. 2,4-Dichlorophenol.
 Some tank pitting has been reported when this cargo is contaminated with water, including moisture in the air. The IMO Chemical Code requires that the
  vapor space over this cargo be kept dry.
5. Reserved.
6. Diphenylmethane diisocyanate; Hexamethylene diisocyanate; Isophorone diisocyanate; Polymethylene polyphenyl isocyanate; Toluene diisocyanate;
  Trimethylhexamethylene diisocyanate (2,2,4- and 2,4,4- isomers).
 Water is effective in extinguishing open air fires but will generate hazardous quantities of gas if put on the cargo in enclosed spaces.
7. Maleic anhydride; Nitroethane; Nitroethane, 1-Nitropropane mixtures; 1- or 2-Nitropropane; Nitropropane, Nitroethane mixtures.
 Dry chemical extinguishers should not be used on fires involving these cargoes since some dry chemicals may react with the cargo and cause an
  explosion.
8. Xylenes.
 Special requirement .908(b) only applies to the para- (p-) isomer, and mixtures containing the para-isomer having a melting point of 0 deg C (32 deg F)
  or more.


[USCG-2000-7079, 65 FR 67196, Nov. 8, 2000, as amended by USCG-2012-
0832, 77 FR 59785, Oct. 1, 2012]

[[Page 286]]



Sec. Table 2 to Part 153--Cargoes Not Regulated Under Subchapters D or O 
      of This Chapter When Carried in Bulk on Non-Oceangoing Barges

The cargoes listed in this table are not regulated under subchapter D or
 O of this title when carried in bulk on non-oceangoing barges. Category
 X, Y, or Z noxious liquid substance (NLS) cargo, as defined in Annex II
 of MARPOL 73/78, listed in this table, or any mixture containing one or
 more of these cargoes, must be carried under this subchapter if carried
                     in bulk on an oceangoing ship.
------------------------------------------------------------------------
                                                               Pollution
                           Cargoes                             category
------------------------------------------------------------------------
Acrylic acid/ethenesulfonic (alternately ethenesulphonic)             Z
 acid copolymer with phosphonate groups, sodium salt
 solution...................................................
Aluminum sulfate (alternately Aluminium sulphate) solution..          Y
2-Amino-2-hydroxymethyl-1,3-propanediol solution............          
Ammonium hydrogen phosphate solution........................          Z
Ammonium lignosulfonate (alternately lignosulphonate)                 Z
 solutions, see also Lignin liquor..........................
Ammonium nitrate solution (45% or less).....................          
Ammonium phosphate, urea solution, see also Urea/Ammonium             
 phosphate solution.........................................
Ammonium polyphosphate solution.............................          Z
Ammonium sulfate (alternately sulphate) solution............          Z
Ammonium thiosulfate (alternately thiosulphate) solution              Z
 (60% or less)..............................................
Apple juice.................................................         OS
Calcium bromide solution....................................          Z
Calcium carbonate slurry....................................         OS
Calcium chloride solution...................................          Z
Calcium hydroxide slurry....................................          Z
Calcium lignosulfonate (alternately lignosulphonate)                  Z
 solution, see also Lignin liquor...........................
Calcium nitrate solutions (50% or less).....................          Z
Calcium nitrate/Magnesium nitrate/Potassium chloride                  Z
 solution...................................................
Caramel solutions...........................................          
Chlorinated paraffins (C14-C17) (with 50% Chlorine or more,           X
 and less than 1% C13 or shorter chains)....................
Chlorinated paraffins (C14-C17) (with 52% Chlorine).........          
2-Chloro-4-ethylamino-6-isopropylamino-5-triazine solution..          
4-Chloro-2-methylphenoxyacetic acid, dimethylamine salt               Y
 solution...................................................
Choline chloride solutions..................................          Z
Clay slurry.................................................         OS
Coal slurry.................................................         OS
Dextrose solution, see Glucose solution.
Diethylenetriaminepentaacetic acid, pentasodium salt                  Z
 solution...................................................
1,4-Dihydro-9,10-dihydroxy anthracene, disodium salt                  
 solution...................................................
Dodecenylsuccinic acid, dipotassium salt solution...........          
Drilling brine (containing Calcium, Potassium, or Sodium              
 salts) (see also Potassium chloride solution (10% or more))
Drilling brines, including: Calcium bromide solution,                 Z
 Calcium chloride solution and Sodium chloride solution (if
 non-flammable and non-combustible).........................
Drilling brines (containing Zinc salts).....................          X
Drilling mud (low toxicity) (if non-flammable and non-                
 combustible)...............................................
Ethylene-Vinyl acetate copolymer (emulsion).................          Y
Ferric hydroxyethylethylenediamine triacetic acid, trisodium          
 salt solution..............................................
Fish solubles (water-based fish meal extracts)..............          
Fructose solution...........................................          
Glucose solution............................................         OS
Glycine, Sodium salt solution...............................          Z
Glyphosate solution (not containing surfactant).............          Y
Hexamethylenediamine adipate solution.......................          
Hexamethylenediamine adipate (50% in water).................          Z
N-(Hydroxyethyl)ethylenediamine triacetic acid, trisodium             Y
 salt solution..............................................
Kaolin clay solution........................................          
Kaolin slurry...............................................         OS
Kraft pulping liquor (free alkali content, 1% or less)                
 including: Black, Green, or White liquor...................
Lignin liquor (free alkali content, 1% or less).............          Z
including:
    Ammonium lignosulfonate (alternately lignosulphonate)             Z
     solution...............................................
    Calcium lignosulfonate (alternately lignosulphonate)              Z
     solution...............................................
    Sodium lignosulfonate (alternately lignosulphonate)               Z
     solution...............................................
Ligninsulfonic (alternately ligninsulphonic) acid, Sodium             Z
 salt solution..............................................
Magnesium chloride solution.................................          Z
Magnesium hydroxide slurry..................................          Z
Magnesium sulfonate (alternately sulphonate) solution.......          
Maltitol solution...........................................         OS
Microsilica slurry..........................................         OS
Milk........................................................          
Molasses....................................................         OS
Molasses residue (from fermentation)........................          
Naphthalenesulfonic (alternately Naphthalenesulphonic) acid-          Z
 Formaldehyde copolymer, sodium salt solution...............
Naphthenic acid, sodium salt solution.......................          
Nitrilotriacetic acid, trisodium salt solution..............          Y

[[Page 287]]

 
Noxious liquid, NF, (1) n.o.s. (``trade name'' contains               X
 ``principal components'') ST 1, Cat X (if non-flammable and
 non-combustible)...........................................
Noxious liquid, NF, (3) n.o.s. (``trade name'' contains               X
 ``principal components'') ST 2, Cat X (if non-flammable and
 non-combustible)...........................................
Noxious liquid, NF, (5) n.o.s. (``trade name'' contains               Y
 ``principal components'') ST 2, Cat Y (if non-flammable and
 non-combustible)...........................................
Noxious liquid, NF, (7) n.o.s. (``trade name'' contains               Y
 ``principal components'') ST 3, Cat Y (if non-flammable and
 non-combustible)...........................................
Noxious liquid, NF, (9) n.o.s. (``trade name'' contains               Z
 ``principal components'') ST 3, Cat Z (if non-flammable and
 non-combustible)...........................................
Noxious liquid, NF, (11) n.o.s. (``trade name'' contains              Z
 ``principal components'') Cat Z (if non-flammable and non-
 combustible)...............................................
Noxious liquid, NF, (12) n.o.s. (``trade name'' contains             OS
 ``principal components'') Cat OS (if non-flammable and non-
 combustible)...............................................
Orange juice (concentrated).................................         OS
Orange juice (not concentrated).............................         OS
Pentasodium salt of Diethylenetriaminepentaacetic acid
 solution, see Diethylenetriaminepentaacetic acid,
 pentasodium salt solution.
Polyaluminum (alternately Polyaluminium) chloride solution..          Z
Potassium chloride solution (26% or more), see Drilling
 brines, including: Calcium bromide solution, Calcium
 chloride solution, and Sodium chloride solution.
Potassium chloride solution (less than 26%).................         OS
Potassium formate solutions.................................          Z
Potassium thiosulfate (alternately thiosulphate) (50% or              Y
 less)......................................................
Sewage sludge, treated (treated so as to pose no additional           
 decompositional and fire hazard; stable, non-corrosive, non-
 toxic, non-flammable)......................................
Silica slurry...............................................          
Sludge, treated (treated so as to pose no additional                  
 decompositional and fire hazard; stable, non-corrosive, non-
 toxic, non-flammable)......................................
Sodium acetate, Glycol, Water mixture (containing 1% or less          
 Sodium hydroxide) (if non-flammable or non-combustible)....
Sodium acetate solutions....................................          Z
Sodium alkyl (C14-C17) sulfonates (alternately sulphonates)           Y
 (60-65% solution)..........................................
Sodium aluminosilicate slurry...............................          Z
Sodium bicarbonate solution (less than 10%).................         OS
Sodium carbonate solution...................................          Z
Sodium hydrogen sulfide (alternately sulphide) (6% or less)/          Z
 Sodium carbonate (3% or less) solution.....................
Sodium lignosulfonate (alternately lignosulphonate)                   Z
 solution, see also Lignin liquor...........................
Sodium naphthenate solution (free alkali content 3% or
 less), see Naphthenic acid, sodium salt solution.
Sodium poly(4+)acrylate solutions...........................          Z
Sodium silicate solution....................................          Y
Sodium sulfate (alternately sulphate) solutions.............          Z
Sodium sulfite (alternately sulphite) solution (25% or less)          Y
Sodium thiocyanate solution (56% or less)...................          Y
Sorbitol solution...........................................         OS
Sulfonated (alternately Sulphonated) polyacrylate solution..          Z
Tetrasodium salt of Ethylenediaminetetraaacetic acid
 solution, see Ethylenediaminetetraacetic acid, tetrasodium
 salt solution.
Titanium dioxide slurry.....................................          Z
1,1,1-Trichloroethane.......................................          Y
1,1,2-Trichloro-1,2,2-trifluoroethane.......................          Y
Trisodium salt of N-(Hydroxyethyl)ethylenediaminetriacetic
 acid solution, see N-(Hydroxyethyl)ethylenediaminetriacetic
 acid, trisodium salt solution.
Urea, Ammonium mono- and di-hydrogen phosphate, Potassium             
 chloride solution..........................................
Urea/Ammonium nitrate solution *............................          Z
Urea/Ammonium phosphate solution............................          Z
Urea solution...............................................          Z
Vanillin black liquor (free alkali content, 1% or less).....          
Vegetable protein solution (hydrolyzed) (if non-flammable            OS
 and non-combustible).......................................
Water.......................................................         OS
Zinc bromide, Calcium bromide solution, see Drilling brines
 (containing Zinc salts).
------------------------------------------------------------------------
Explanation of symbols and abbreviations used in this table:
``'' = No determination of noxious liquid substance status. For
  shipping on an oceangoing vessel, see 46 CFR 153.900(c).
Bolded entries were added from the March 2012 Annex to the 2007 edition
  of the IBC Code (MEPC 63/23/Add.1), the December 2012 IMO Marine
  Environmental Protection Committee Circular (MEPC.2/Circ.18), or the
  December 2013 IMO Marine Environmental Protection Committee Circular
  (MEPC.2/Circ.19).
``Cat'' = Pollution category.
``NF'' = Non-flammable (flash point greater than 60 [deg]C (140 [deg]F)
  closed cup).
``n.o.s.'' = Not otherwise specified.

[[Page 288]]

 
``OS'' = Other substances, at present considered to present no harm to
  marine resources, human health, amenities, or other legitimate uses of
  the sea when discharged into the sea from tank cleaning or
  deballasting operations.
``see'' = A redirection to the preferred, alternative cargo name-for
  example, in ``Tetrasodium salt of Ethylenediaminetetraaacetic acid
  solution, see Ethylenediaminetetraacetic acid, tetrasodium salt
  solution,'' the pollution category for ``Tetrasodium salt of
  Ethylenediaminetetraaacetic acid solution'' will be found under the
  preferred, alternative cargo name ``Ethylenediaminetetraacetic acid,
  tetrasodium salt solution.''
``ST'' = Ship type, as defined in Chapter 2 of the IBC Code.
``X, Y, Z'' = Noxious liquid substance category of Annex II of MARPOL 73/
  78.


[78 FR 50208, Aug. 16, 2013, as amended at USCG-2013-0423, 85 FR 21728, 
Apr. 17, 2020]



                 Sec. Appendix I to Part 153 [Reserved]



       Sec. Appendix II to Part 153--Metric Units Used in Part 153

----------------------------------------------------------------------------------------------------------------
                                                                                          Equivalent to English
              Parameter                    Metric (SI unit)           Abbreviation           or common metric
----------------------------------------------------------------------------------------------------------------
Force................................  Newton.................  N......................  0.225 lbs.
Length...............................  Meter..................  m......................  39.37 in.
                                       Centimeter.............  cm.....................  .3937 in.
Pressure.............................  Pascal.................  Pa.....................  1.450 x 10-4 lbs/in
                                                                                          \2\.
                                       Kilo-Pascal (1,000       kPa....................  0.145 lbs/in \2\.
                                        Pascals).
                                       Kilo-Pascal............  kPa....................  1.02 x 10-2 kg/cm\2\.
                                       ......do...............  kPa....................  1 x 10 \3\ N/m \2\.
Temperature..........................  Degree Celsius.........  [deg]C.................  5/9 ([deg]F-32).
Viscosity............................  milli-Pascal second....  mPa. sec...............  1.0 centipoise.
Volume...............................  Cubic meter............  m \3\..................  264 gallons (gal).
                                       ......do...............  m \3\..................  35.3 ft. \3\
----------------------------------------------------------------------------------------------------------------


[CGD 73-96, 42 FR 49027, Sept. 26, 1977, as amended by CGD 78-128, 47 FR 
21212, May 17, 1982; CGD 81-101, 52 FR 7799, Mar. 12, 1987. Redesignated 
by CGD 92-100, 59 FR 17045, Apr. 11, 1994]



PART 154_SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED 
GASES--Table of Contents



                            Subpart A_General

Sec.
154.1 Incorporation by reference.
154.3 Purpose.
154.5 Applicability.
154.7 Definitions, acronyms, and terms.
154.9 Issuance of documents.
154.12 Existing gas vessel: Endorsements and requirements.
154.15 U.S. flag vessel: Endorsement application.
154.17 U.S. flag vessel: Certificate of Inspection endorsement.
154.19 U.S. flag vessel: IMO certificate issuance.
154.22 Foreign flag vessel: Certificate of Compliance endorsement 
          application.
154.24 Foreign flag vessel: IMO Certificate.
154.30 [Reserved]
154.32 Equivalents.
154.34 Special approval: Requests.
154.36 Correspondence and vessel information: Submission.
154.40 Right of appeal.

                     Subpart B_Inspections and Tests

            Examination Requirements for Foreign Flag Vessels

154.150 Examination required for a Certificate of Compliance.
154.151 Procedures for having the Coast Guard examine a vessel for a 
          Certificate of Compliance.

              Subpart C_Design, Construction, and Equipment

                             Hull Structure

154.170 Outer hull steel plating.
154.172 Contiguous steel hull structure.
154.174 Transverse contiguous hull structure.
154.176 Longitudinal contiguous hull structure.
154.178 Contiguous hull structure: Heating system.
154.180 Contiguous hull structure: Welding procedure.
154.182 Contiguous hull structure: Production weld test.
154.188 Membrane tank: Inner hull steel.
154.195 Aluminum cargo tank: Steel enclosure.

[[Page 289]]

            Ship Survival Capability and Cargo Tank Location

154.200 Stability requirements: General.
154.235 Cargo tank location.

                            Ship Arrangements

154.300 Segregation of hold spaces from other spaces.
154.305 Segregation of hold spaces from the sea.
154.310 Cargo piping systems.
154.315 Cargo pump and cargo compressor rooms.
154.320 Cargo control stations.
154.325 Accommodation, service, and control spaces.
154.330 Openings to accommodation, service, or control spaces.
154.340 Access to tanks and spaces in the cargo area.
154.345 Air locks.
154.350 Bilge and ballast systems in the cargo area.
154.355 Bow and stern loading piping.
154.356 Cargo emergency jettisoning piping.

                        Cargo Containment Systems

154.401 Definitions.
154.405 Design vapor pressure (Po) of a cargo tank.
154.406 Design loads for cargo tanks and fixtures: General.
154.407 Cargo tank internal pressure head.
154.408 Cargo tank external pressure load.
154.409 Dynamic loads from vessel motion.
154.410 Cargo tank sloshing loads.
154.411 Cargo tank thermal loads.
154.412 Cargo tank corrosion allowance.

                             Integral Tanks

154.418 General.
154.419 Design vapor pressure.
154.420 Tank design.
154.421 Allowable stress.

                             Membrane Tanks

154.425 General.
154.426 Design vapor pressure.
154.427 Membrane tank system design.
154.428 Allowable stress.
154.429 Calculations.
154.430 Material test.
154.431 Model test.
154.432 Expansion and contraction.

                           Semi-Membrane Tanks

154.435 General.
154.436 Design vapor pressure.

                         Independent Tank Type A

154.437 General.
154.438 Design vapor pressure.
154.439 Tank design.
154.440 Allowable stress.

                         Independent Tank Type B

154.444 General.
154.445 Design vapor pressure.
154.446 Tank design.
154.447 Allowable stress.
154.448 Calculations.
154.449 Model test.

          Independent Tank Type C and Process Pressure Vessels

154.450 General.
154.451 Design vapor pressure.
154.452 External pressure.
154.453 Failure to meet independent tank type C standards.

                            Secondary Barrier

154.459 General.
154.460 Design criteria.

                               Insulation

154.465 General.
154.466 Design criteria.
154.467 Submission of insulation information.

                             Support System

154.470 General.
154.471 Design criteria.
154.476 Cargo transfer devices and means.

                    Cargo and Process Piping Systems

154.500 Cargo and process piping standards.
154.503 Piping and piping system components: Protection from movement.
154.506 Mechanical expansion joint: Limits in a piping system.
154.512 Piping: Thermal isolation.
154.514 Piping: Electrical bonding.
154.516 Piping: Hull protection.
154.517 Piping: Liquid pressure relief.
154.519 Piping relief valves.
154.520 Piping calculations.
154.522 Materials for piping.
154.524 Piping joints: Welded and screwed couplings.
154.526 Piping joints: Flange connection.
154.528 Piping joints: Flange type.
154.530 Valves: Cargo tank MARVS 69 kPa gauge (10 psig) or lower.
154.532 Valves: Cargo tank MARVS greater than 69 kPa gauge (10 psig).
154.534 Cargo pumps and cargo compressors.
154.536 Cargo tank gauging and measuring connections.
154.538 Cargo transfer connection.
154.540 Quick-closing shut-off valves: Emergency shut-down system.
154.544 Quick-closing shut-off valves.
154.546 Excess flow valve: Closing flow.
154.548 Cargo piping: Flow capacity.
154.550 Excess flow valve: Bypass.

                               Cargo Hose

154.551 Cargo hose: General.

[[Page 290]]

154.552 Cargo hose: Compatibility.
154.554 Cargo hose: Bursting pressure.
154.556 Cargo hose: Maximum working pressure.
154.558 Cargo hose: Marking.
154.560 Cargo hose: Prototype test.
154.562 Cargo hose: Hydrostatic test.

                                Materials

154.605 Toughness test.
154.610 Design temperature not colder than 0 [deg]C (32 [deg]F).
154.615 Design temperature below 0 [deg]C (32 [deg]F) and down to -55 
          [deg]C (-67 [deg]F).
154.620 Design temperature below -55 [deg]C (-67 [deg]F) and down to -
          165 [deg]C (-265 [deg]F).
154.625 Design temperature below 0 [deg]C (32 [deg]F) and down to -165 
          [deg]C (-265 [deg]F).
154.630 Cargo tank material.

                              Construction

154.650 Cargo tank and process pressure vessel welding.
154.655 Stress relief for independent tanks type C.
154.660 Pipe welding.
154.665 Welding procedures.

                 Cargo Pressure and Temperature Control

154.701 Cargo pressure and temperature control: General.
154.702 Refrigerated carriage.
154.703 Methane (LNG).
154.705 Cargo boil-off as fuel: General.
154.706 Cargo boil-off as fuel: Fuel lines.
154.707 Cargo boil-off as fuel: Ventilation.
154.708 Cargo boil-off as fuel: Valves.
154.709 Cargo boil-off as fuel: Gas detection equipment.

                           Cargo Vent Systems

154.801 Pressure relief systems.
154.802 Alternate pressure relief settings.
154.804 Vacuum protection.
154.805 Vent masts.
154.806 Capacity of pressure relief valves.

            Atmospheric Control in Cargo Containment Systems

154.901 Atmospheric control within cargo tanks and cargo piping systems.
154.902 Atmospheric control within hold and interbarrier spaces.
154.903 Inert gas systems: General.
154.904 Inert gas system: Controls.
154.906 Inert gas generators.
154.908 Inert gas generator: Location.
154.910 Inert gas piping: Location.
154.912 Inerted spaces: Relief devices.

                               Electrical

154.1000 Applicability.
154.1002 Definition.
154.1005 Equipment approval.
154.1010 Electrical equipment in gas-dangerous space or zone.
154.1015 Lighting in gas-dangerous space.
154.1020 Emergency power.

                              Firefighting

                Firefighting System: Exterior Water Spray

154.1105 Exterior water spray system: General.
154.1110 Areas protected by system.
154.1115 Discharge.
154.1120 Nozzles.
154.1125 Pipes, fittings, and valves.
154.1130 Sections.
154.1135 Pumps.

                    Firefighting System: Dry Chemical

154.1140 Dry chemical system: General.
154.1145 Dry chemical supply.
154.1150 Distribution of dry chemical.
154.1155 Hand hose line: Coverage.
154.1160 Monitor coverage of system.
154.1165 Controls.
154.1170 Hand hose line: General.

                Cargo Area: Mechanical Ventilation System

154.1200 Mechanical ventilation system: General.
154.1205 Mechanical ventilations system: Standards.
154.1210 Hold space, void space, cofferdam, and spaces containing cargo 
          piping.

                             Instrumentation

154.1300 Liquid level gauging system: General.
154.1305 Liquid level gauging system: Standards.
154.1310 Closed gauge shut-off valve.
154.1315 Restricted gauge excess flow valve.
154.1320 Sighting ports, tubular gauge glasses, and flat plate type 
          gauge glasses.
154.1325 Liquid level alarm system: All cargo tanks.
154.1330 Liquid level alarm system: Independent tank type C.
154.1335 Pressure and vacuum protection.
154.1340 Temperature measuring devices.
154.1345 Gas detection.
154.1350 Flammable gas detection system.
154.1360 Oxygen analyzer.
154.1365 Audible and visual alarms.
154.1370 Pressure gauge and vacuum gauge marking.
154.1375 Readout for temperature measuring device: Marking.

                            Safety Equipment

154.1400 Safety equipment: All vessels.
154.1405 Respiratory protection.
154.1410 Decontamination shower.
154.1415 Air compressor.
154.1420 Stretchers and equipment.
154.1430 Equipment locker.
154.1435 Medical first aid guide.
154.1440 Antidotes.

[[Page 291]]

           Subpart D_Special Design and Operating Requirements

154.1700 Purpose.
154.1702 Materials of construction.
154.1705 Independent tank type C.
154.1710 Exclusion of air from cargo tank vapor spaces.
154.1715 Moisture control.
154.1720 Indirect refrigeration.
154.1725 Ethylene oxide.
154.1730 Ethylene oxide: Loading and off-loading.
154.1735 Methyl acetylene-propadiene mixture.
154.1740 Vinyl chloride: Inhibiting and inerting.
154.1745 Vinyl chloride: Transferring operations.
154.1750 Butadiene or vinyl chloride: Refrigeration system.
154.1755 Nitrogen.
154.1760 Liquid ammonia.

                          Subpart E_Operations

154.1800 Special operating requirements under Part 35 of this chapter.
154.1801 Certificates, letters, and endorsements: U.S. flag vessels.
154.1802 Certificates, letters, and endorsements: Foreign flag vessels.
154.1803 Expiration of Certificates of Compliance.
154.1804 Document posted in wheelhouse.
154.1806 Regulations on board.
154.1808 Limitations in the endorsement.
154.1809 Loading and stability manual.
154.1810 Cargo manual.
154.1812 Operational information for terminal personnel.
154.1814 Cargo information cards.
154.1816 Cargo location plan.
154.1818 Certification of inhibition.
154.1820 Shipping document.
154.1822 Shipping document: Copy for transfer terminal.
154.1824 Obstruction of pumproom ladderways.
154.1826 Opening of cargo tanks and cargo sampling.
154.1828 Spaces containing cargo vapor: Entry.
154.1830 Warning sign.
154.1831 Persons in charge of transferring liquid cargo in bulk or 
          preparing cargo tanks.
154.1834 Cargo transfer piping.
154.1836 Vapor venting as a means of cargo tank pressure and temperature 
          control.
154.1838 Discharge by gas pressurization.
154.1840 Protective clothing.
154.1842 Cargo system: Controls and alarms.
154.1844 Cargo tanks: Filling limits.
154.1846 Relief valves: Changing set pressure.
154.1848 Inerting.
154.1850 Entering cargo handling spaces.
154.1852 Air breathing equipment.
154.1854 Methane (LNG) as fuel.
154.1858 Cargo hose.
154.1860 Integral tanks: Cargo colder than -10 [deg]C (14 [deg]F).
154.1862 Posting of speed reduction.
154.1864 Vessel speed within speed reduction.
154.1866 Cargo hose connection: Transferring cargo.
154.1868 Portable blowers in personnel access openings.
154.1870 Bow and stern loading.
154.1872 Cargo emergency jettisoning.

Appendix A to Part 154--Equivalent Stress
Appendix B to Part 154--Stress Analyses Definitions

    Authority: 46 U.S.C. 3703, 9101; Department of Homeland Security 
Delegation No. 0170.1.

    Source: CGD 74-289, 44 FR 26009, May 3, 1979, unless otherwise 
noted.

    Editorial Note: Nomenclature changes to part 154 appear part 154 
appear by CGD-95-072, 60 FR 50466, Sept. 29, 1995, CGD-96-041, 61 FR 
50732, Sept. 27, 1996, USCG-2009-0702, 74 FR 49235, Sept. 25, 2009, and 
USCG-2012-0832, 77 FR 59785, Oct. 1, 2012.



                            Subpart A_General

    Source: CGD 77-069, 52 FR 31626, Aug. 21, 1987, unless otherwise 
noted.



Sec.  154.1  Incorporation by reference.

    (a) Certain materials are incorporated by reference into this part 
with approval of the Director of the Federal Register in accordance with 
5 U.S.C. 552(a). The Office of the Federal Register publishes a list 
``Material Approved for Incorporation by Reference,'' which appears in 
the Finding Aids section of this volume. 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. All approved material is on file at the Coast Guard 
Headquarters. Contact Commandant (CG-ENG), Attn: Office of Design and 
Engineering Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King 
Jr. Avenue SE., Washington, DC 20593-7509; or contact the National 
Archives and Records Administration (NARA). For information on the 
availability of this material at NARA, call 202-741-6030, or go to: 
http://

[[Page 292]]

www.archives.gov/federal_register/code_of_federal_regulations/
ibr_locations.html.
    (b) The materials approved for incorporation by reference in this 
part are:

                    American Bureau of Shipping (ABS)

ABS Plaza, 16855 Northchase Drive, Houston, TX 77060
Rules for Building and Classing Steel Vessels, 1981

                  American National Standards Institute

11 West 42nd Street, New York, NY 10036
ANSI Z89.1-69 Safety Requirements for Industrial Head Protection, 1969
ANSI Z87.1-79 Practice for Occupational and Educational Eye and Face 
Protection, 1979

            American Society for Testing and Materials (ASTM)

100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.
ASTM A 20/A 20M-97a, Standard Specification for General Requirements for 
Steel Plates for Pressure Vessels--154.610
ASTM F 1014-92, Standard Specification for Flashlights on Vessels--
          154.1400

    Note: All other documents referenced in this part are still in 
effect.

                   International Maritime Organization

Publications Section, 4 Albert Embankment, London SE1 7SR, United 
Kingdom
Resolution A.328(IX), Code for the Construction and Equipment of Ships 
Carrying Liquefied Gases in Bulk, 1976
Code For Existing Ships Carrying Liquefied Gases in Bulk, 1976
Medical First Aid Guide for Use in Accidents Involving Dangerous Goods

                     Underwriters Laboratories, Inc.

12 Laboratory Drive, Research Triangle Park, NC 27709-3995
UL No. 783-79 Standard for Safety, Electric Flashlights for Use in 
Hazardous Locations, Class 1, Groups C and D, 1979.

[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 82-042, 53 FR 
17705, May 18, 1988; CGD 82-042, 53 FR 18949, May 25, 1988; CGD 88-070, 
53 FR 34535, Sept. 7, 1988; CGD 96-041, 61 FR 50732, Sept. 27, 1996; CGD 
97-057, 62 FR 51048, Sept. 30, 1997; USCG-1999-5151, 64 FR 67183, Dec. 
1, 1999; USCG-2000-7790, 65 FR 58463, Sept. 29, 2000; 69 FR 18803, Apr. 
9, 2004; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013]



Sec.  154.3  Purpose.

    The purpose of this part is to prescribe rules for new and existing 
gas vessels.



Sec.  154.5  Applicability.

    This part applies to each self-propelled vessel that has on board 
bulk liquefied gases as cargo, cargo residue or vapor, except subpart C 
does not apply if the vessel meets Sec.  154.12 (b), (c), or (d).



Sec.  154.7  Definitions, acronyms, and terms.

    As used in this part:
    ``A'' Class Division means a division as defined in Regulation 3 of 
Chapter II-2 of the 1974 Safety Convention.
    Accommodation spaces means public spaces, corridors, lavatories, 
cabins, offices, hospitals, cinemas, game and hobby rooms, pantries 
containing no cooking appliances, and spaces used in a similar fashion.
    Boiling point means the temperature at which a substance's vapor 
pressure is equal to the atmospheric barometric pressure.
    Breadth (B) means the maximum width of the vessel in meters measured 
amidships to the molded 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.
    Cargo area means that part of the vessel that contains the cargo 
containment system, cargo pump rooms, cargo compressor rooms, and the 
deck areas over the full beam and the length of the vessel above them, 
but does not include the cofferdams, ballast spaces, or void spaces at 
the after end of the aftermost hold space or the forward end of the 
forwardmost hold space.
    Cargo containment system means the arrangement for containment of 
the cargo including a primary and secondary barrier, associated 
insulation and any intervening spaces, and adjacent structure that is 
necessary for the support of these elements.
    Cargo service space means space within the cargo area that is more 
than 2 m\2\ (21.5 ft.\2\) in deck area and used for work shops, lockers, 
or store rooms.
    Cargo tank means the liquid tight shell that is the primary 
container of the cargo.
    Certificate of Compliance means a certificate issued by the Coast 
Guard to a foreign flag vessel after it is examined and found to comply 
with regulations in this chapter.

[[Page 293]]

    Cofferdam means the isolating space between two adjacent steel 
bulkheads or decks, which could be a void space or a ballast space.
    Contiguous hull structure includes the inner deck, the inner bottom 
plating, longitudinal bulkhead plating, transverse bulkhead plating, 
floors, webs, stringers, and attached stiffeners.
    Control space means those spaces in which the vessel's radio, main 
navigating equipment, or the emergency source of power is located or in 
which the fire control equipment, other than firefighting control 
equipment under Sec.  154.1140 to Sec.  154.1170, is centralized.
    Design temperature means the minimum cargo temperature the Coast 
Guard allows for loading, unloading, or carriage.
    Design vapor pressure (Po) means the maximum gauge 
pressure at the top of the cargo tank for the design of the cargo tank.
    Document means a Certificate of Inspection for a U.S. flag vessel or 
a Certificate of Compliance for a foreign flag vessel.
    Existing gas vessel means a self-propelled vessel that--
    (a) Is delivered on or before October 31, 1976; or
    (b) Is delivered between October 31, 1976 and June 30, 1980, and is 
not a new gas vessel.
    Flammable cargoes includes the following liquefied gases from Table 
4 (follows Sec.  154.1872):

Acetaldehyde
Butadiene
Butane
Butylene
Dimethylamine
Ethane
Ethylamine
Ethyl chloride
Ethylene
Ethylene oxide
Methane (LNG)
Methyl acetylene-propadiene mixture
Methyl bromide
Methyl chloride
Propane
Propylene
Vinyl chloride

    Gas-dangerous space includes the following spaces:
    (a) A space in the cargo area without arrangements to provide a safe 
atmosphere at all times.
    (b) An enclosed space outside the cargo area through which any 
piping that may contain liquid or gaseous cargo passes, or within which 
that piping terminates, without arrangements to prevent gas from 
escaping into the space.
    (c) A cargo containment system and cargo piping.
    (d) A hold space where cargo is carried in a cargo containment 
system:
    (1) With a secondary barrier; or
    (2) Without a secondary barrier.
    (e) A space separated from a hold space under paragraph (d)(1) of 
this definition by a single gastight boundary.
    (f) A cargo pumproom and a cargo compressor room.
    (g) A zone on the weather deck or a semi-enclosed space on the 
weather deck within 3.05 m (10 ft) of any cargo tank outlet, gas or 
vapor outlet, cargo pipe flange, cargo valve, or of entrances and 
ventilation openings to a cargo pump room or a cargo compressor room.
    (h) Except for existing gas vessels, the weather deck over the cargo 
area and 3.05 m (10 ft) forward and aft of the cargo area on the weather 
deck to 2.4 m (8 ft) above the weather deck.
    (i) A zone within 2.4 m (8 ft) of the outer surface of a cargo 
containment system where the surface is exposed to the weather.
    (j) An enclosed or semi-enclosed space in which there is piping 
containing cargo, except those--
    (1) With gas sampling lines for gas detection equipment under Sec.  
154.1350(n); or
    (2) In which boil-off gas is used as fuel under Sec.  154.703.
    (k) A space for storage of cargo hoses.
    (l) An enclosed or semi-enclosed space having an opening into any 
gas-dangerous space or zone.
    Gas-safe space means a space that is not a gas-dangerous space.
    Hold space means the space enclosed by the vessel's structure in 
which there is a cargo containment system.
    IMO stands for the lnternational Maritime Organization.
    IMO Certificate means a Certificate of Fitness for the Carriage of 
Liquefied Gases in Bulk issued under the IMO--

[[Page 294]]

    (a) ``Code for the Construction and Equipment of Ships Carrying 
Liquefied Gases in Bulk'', adopted November 12, 1975 by Assembly 
Resolution A.328(IX), as amended;
    (b) ``Code for Existing Ships Carrying Liquefied Gases in Bulk'', 
adopted November 12, 1975, as amended; or
    (c) ``Recommendations Concerning Ships Not Covered by the Code for 
the Construction and Equipment of Ships Carrying Liquefied Gases in 
Bulk'', (Resolution A.328(IX)), adopted November 12, 1975 by Assembly 
Resolution A.329(IX).
    Independent tank is a cargo tank that is permanently affixed to the 
vessel, is self-supporting, and is not part of the hull or essential to 
the strength or integrity of the hull.
    Independent tank type A is an independent cargo tank designed 
primarily using classification society classical ship structural 
analysis procedures.
    Independent tank type B is an independent cargo tank designed from 
model tests, refined analytical tools, and analysis methods to determine 
stress levels, fatigue life, and crack propagation characteristics.
    Independent tank type C (pressure tank) is an independent cargo tank 
meeting pressure vessel criteria where the dominant stress producing 
load is design vapor pressure.
    Insulation space means a space, that could be an interbarrier space, 
occupied wholly or in part by insulation.
    Integral tank means a cargo tank that is a structural part of the 
vessel's hull and is influenced in the same manner and by the same loads 
that stress the adjacent hull structure.
    Interbarrier space means the space between a primary and a secondary 
barrier, with or without insulation or other material.
    Length (L) is ninety-six percent of the total length in meters on a 
waterline at eighty-five percent of the least molded 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 the waterline, whichever is greater. In 
vessels having a rake of keel, the waterline is parallel to the design 
waterline.
    Liquefied gas means a cargo having a vapor pressure of 172 kPa (25 
psia) or more at 37.8 [deg]C (100 [deg]F).
    MARVS stands for the Maximum Allowable Relief Valve Setting.
    Membrane tank is a cargo tank that is not self-supporting and 
consists of a thin layer (membrane) supported through insulation by the 
adjacent hull structure.
    New gas vessel means a self-propelled vessel that--
    (a) Is constructed under a building contract awarded after October 
31, 1976;
    (b) In the absence of a building contract, has a keel laid or is at 
a similar stage of construction after December 31, 1976;
    (c) Is delivered after June 30, 1980; or
    (d) Has undergone a major conversion for which--
    (1) The building contract is awarded after October 31, 1976;
    (2) In the absence of a building contract, conversion is begun after 
December 31, 1976; or
    (3) Conversion is completed after June 30, 1980.
    Primary barrier means the inner boundary that contains the cargo 
when the cargo containment system includes two boundaries.
    Process pressure vessel means a pressure vessel that is used in a 
reliquefaction, cargo heating, or other system that processes cargo.
    Remote group alarm means an audible and visual alarm that alerts 
when an alarm condition exists but does not identify that condition.
    Secondary barrier means the liquid resisting outer boundary of a 
cargo containment system when the cargo containment system includes two 
boundaries.
    Semi-membrane tank is a cargo tank that is not self-supporting and 
that can expand and contract due to thermal, hydrostatic, and pressure 
loadings. It consists of flat surfaces, supported through insulation by 
the adjacent hull structure, and shaped corners that connect the flat 
surfaces.
    Service space means a space outside the cargo area that is used for 
a galley, pantry containing cooking appliances, locker or store room, 
workshop except those in machinery spaces, and similar spaces and trunks 
to those spaces.

[[Page 295]]

    Shut-off valve is a valve that closes a pipeline and provides 
nominal metal to metal contact between the valve operating parts, 
including the disc and gate, and the valve body.
    Specific gravity (p) means the ratio of the density of the cargo at 
the design temperature to the density of water at 4 [deg]C (39 [deg]F).
    Tank cover is the structure protecting those parts of the cargo 
containment system that protrude through the weather deck and providing 
continuity to the deck structure.
    Tank dome means the uppermost portion of the cargo tank. For below 
deck cargo containment systems, it means the uppermost portion of the 
cargo tank that protrudes through the weather deck or through the tank 
cover.
    Toxic cargoes includes the following liquefied gases from Table 4 
(follows Sec.  154.1872):

Acetaldehyde
Ammonia, anhydrous
Dimethylamine
Ethylamine
Ethyl chloride
Ethylene oxide
Methyl bromide
Methyl chloride
Sulfur dioxide
Vinyl chloride

    Vapor pressure means the absolute equilibrium pressure of the 
saturated vapor above the liquid, expressed in kPa (psia), at a specific 
temperature.
    Void space means an enclosed space in the cargo area outside of the 
cargo containment system, except a hold space, ballast space, fuel oil 
tank, cargo pump or compressor room, or any space used by personnel.
    1974 Safety Convention stands for the International Convention on 
Safety of Life at Sea, 1974, done at London, November 1, 1974.



Sec.  154.9  Issuance of documents.

    The Coast Guard issues an endorsed Certificate of Inspection to a 
U.S. flag vessel or an endorsed Certificate of Compliance to a foreign 
flag vessel that meets this part.



Sec.  154.12  Existing gas vessel: Endorsements and requirements.

    (a) Except an existing gas vessel under paragraph (b), (c), or (d) 
of this section, an existing gas vessel must meet subpart C of this part 
if the owner desires a document endorsed for the carriage of a cargo 
listed in Table 4 (follows Sec.  154.1872).
    (b) If an existing gas vessel is issued a document by the Coast 
Guard before November 1, 1987 that is endorsed for the carriage of a 
cargo listed in Table 4 (follows Sec.  154.1872), and the owner desires 
the same endorsement on a reissued document, the vessel must--
    (1) Continue to meet the same design and construction standards 
under which the Coast Guard issued the original document; and
    (2) Meet paragraph (e) of this section.
    (c) If an existing gas vessel is issued a document by the Coast 
Guard before November 1, 1987 that is endorsed for the carriage of a 
cargo listed in Table 4 (follows Sec.  154.1872), and the owner desires 
an endorsement for a different cargo listed in that table, the vessel 
must--
    (1) Continue to meet the same design and construction standards 
under which the Coast Guard issued the original document;
    (2) Meet paragraph (e) of this section;
    (3) Meet subpart D for the different cargo; and
    (4) Meet any additional requirements of this part that the 
Commandant (CG-ENG) determines to be necessary for safety.
    (d) If an existing gas vessel does not meet paragraph (b) or (c) of 
this section and the owner desires a document endorsed for the carriage 
of a cargo listed in Table 4 (follows Sec.  154.1872), the vessel must--
    (1) Have a letter from the Coast Guard dated before November 1, 1987 
stating that--
    (i) Review of the vessel's plans for the carriage of that cargo is 
completed; or
    (ii) The vessel's IMO Certificate endorsed for the carriage of that 
cargo is accepted;
    (2) Meet the plans that were reviewed and marked ``Examined'' or 
``Approved'' by the Coast Guard, or meet

[[Page 296]]

the standards under which the IMO Certificate was issued;
    (3) Meet paragraph (e) of this section; and
    (4) Meet any additional requirements of this part that the 
Commandant (CG-ENG) determines to be necessary for safety.
    (e) If the owner of a vessel desires any document endorsement 
described in paragraph (b), (c), or (d) of this section, the existing 
gas vessel must meet the requirements in each of the following:
    (1) Section 154.310 (d) and (e).
    (2) Section 154.320 (b) and (c).
    (3) Section 154.330 (a) through (e).
    (4) Section 154.340(d).
    (5) Section 154.345 (a), (b)(1) through (b)(5), (b)(7) and (c).
    (6) Section 154.476(a).
    (7) Section 154.519(a)(2).
    (8) Section 154.534.
    (9) Section 154.538.
    (10) Section 154.540 (c) and (d).
    (11) Section 154.556.
    (12) Section 154.558.
    (13) Section 154.560.
    (14) Section 154.562.
    (15) Section 154.703.
    (16) Section 154.705.
    (17) Section 154.706.
    (18) Section 154.707.
    (19) Section 154.708.
    (20) Section 154.709.
    (21) Section 154.904.
    (22) Section 154.906.
    (23) Section 154.908(a), unless the space is separated from the 
accommodation, service, or control space by a steel door that--
    (i) Is watertight when tested with a firehose at not less than 207 
kPa gauge (30 psig);
    (ii) Has a means to self-close and does not have latches or other 
devices designed to hold it open; and
    (iii) Has an audible and visual alarm on both sides of the door 
which is actuated when the door is open.
    (24) Section 154.910.
    (25) Section 154.912.
    (26) Sections 154.1110 through 154.1130, except Sec. Sec.  
154.1115(b), 154.1120(b), and 154.1125 (c) and (f).
    (27) Section 154.1145, except an existing gas vessel with a cargo 
carrying capacity of less than 2500 m \3\ (88,200 ft \3\) may have only 
one self-contained dry chemical storage unit if that unit--
    (i) is installed before November 1, 1987; and
    (ii) Has the capacity to meet Sec.  154.1145 (d) and (e), and Sec.  
154.1170(e).
    (28) Section 154.1150 (a) and (b).
    (29) Section 154.1155.
    (30) Section 154.1160.
    (31) Section 154.1165 (a), (b), (d), and (f).
    (32) Section 154.1170 (b) through (f).
    (33) Section 154.1200 (a), (b)(1), and (b)(2).
    (34) Section 154.1205(f).
    (35) Section 154.1325.
    (36) Section 154.1335(e).
    (37) Section 154.1350 (e), (f), (i), (o), and (u).



Sec.  154.15  U.S. flag vessel: Endorsement application.

    (a) A person who desires the endorsement required under Sec.  
154.1801 for a U.S. flag vessel must submit an application for an 
endorsement of the vessel's Subchapter D Certificate of Inspection under 
the procedures in Sec.  91.55-15 of this chapter.
    (b) The person requesting an endorsement under paragraph (a) of this 
section must submit to the Coast Guard, if requested--
    (1) Calculations for hull design required by Sec.  172.175 of this 
chapter;
    (2) The plans and information listed in Sec. Sec.  54.01-18, 56.01-
10, 91.55-5 (a), (b), (d), (g), and (h), and 110.25-1 of this chapter;
    (3) Plans for the dry chemical supply and distribution systems, 
including the controls; and
    (4) Any other vessel information, including, but not limited to 
plans, design calculations, test results, certificates, and 
manufacturer's data, needed to determine whether or not the vessel meets 
the standards of this part.



Sec.  154.17  U.S. flag vessel: Certificate of Inspection endorsement.

    The Certificate of Inspection for a U.S. flag vessel allowed to 
carry a liquefied gas listed in Table 4 has the following endorsement 
for each cargo, with the corresponding carriage requirement data 
inserted:

    Inspected and approved for the carriage of ___ at a maximum 
allowable relief valve setting of ___ kPa gauge (___ psig) with an F 
factor of ___, a maximum external pressure of ___ kPa gauge (___ psig), 
a

[[Page 297]]

minimum service temperature of ___ [deg]C (___ [deg]F), and a maximum 
specific gravity of ___. Hull type ___.



Sec.  154.19  U.S. flag vessel: IMO certificate issuance.

    (a) Either a classification society authorized under 46 CFR part 8, 
or the Coast Guard Officer in Charge, Marine Inspection, issues an IMO 
Certificate to a U.S. flag vessel when requested by the owner or 
representative, if--
    (1) The vessel meets the requirements of this part; and
    (2) It is a new gas vessel, it meets the IMO Resolution A.328(IX), 
``Code for the Construction and Equipment of Ships Carrying Liquefied 
Gases in Bulk, 1975''; or
    (3) It is an existing gas vessel, it meets the IMO ``Code for 
Existing Ships Carrying Liquefied Gases in Bulk, 1975''.
    (b) The IMO Certificate expires on the same date that the vessel's 
Certificate of Inspection expires.

[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 95-010, 62 FR 
67537, Dec. 24, 1997]



Sec.  154.22  Foreign flag vessel: Certificate of Compliance 
endorsement application.

    (a) A person who desires an endorsed Certificate of Compliance to 
meet Sec.  154.1802(a) of this part for a foreign flag vessel, whose 
flag administration issues IMO Certificates, must submit to the 
Commanding Officer (MSC), Attn: Marine Safety Center, U.S. Coast Guard 
Stop 7430, 2703 Martin Luther King Jr. Avenue SE., Washington, DC 20593-
7430, in a written or electronic format, an application that includes 
the following:
    (1) The vessel's valid IMO Certificate.
    (2) A description of the vessel.
    (3) Specifications for the cargo containment system.
    (4) A general arrangement plan of the vessel.
    (5) A midship section plan of the vessel.
    (6) Schematic plans of the liquid and vapor cargo piping.
    (7) A firefighting and safety plan.
    (8) If the applicant is requesting an endorsement for the carriage 
of ethylene oxide, a classification society certification that the 
vessel meets Sec.  154.1725(a) (4), (5), and (7).
    (9) If the vessel is a new gas vessel, or an existing vessel that 
does not meet Sec.  154.12 (b), (c), or (d)--
    (i) A certification from a classification society that the vessel--
    (A) Has enhanced grades of steel meeting Sec.  154.170 (b)(1) and 
(b)(2) for crack arresting purposes in the deck stringer, sheer strake, 
and bilge strake; and
    (B) Meets Sec.  154.701, or if the vessel carries methane, meets 
Sec.  154.703, by having the capability of cargo tank pressure and 
temperature control without venting; and
    (ii) The vessel's valid SOLAS Cargo Ship Safety Construction 
Certificate and Cargo Ship Safety Equipment Certificate.
    (10) Any additional plans, certificates, and information needed by 
the Commanding Officer, Marine Safety Center to determine whether or not 
the vessel meets this part.
    (b) A person who desires an endorsed Certificate of Compliance to 
meet Sec.  154.1802(b) for a foreign flag vessel, whose flag 
administration does not issue IMO Certificates, must submit to the 
Commanding Officer, Marine Safety Center the plans, calculations, and 
information under Sec.  154.15(b).

[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by CGD 88-070, 53 FR 
34535, Sept. 7, 1988; CGD 89-025, 54 FR 19571, May 8, 1989; CGD 95-072, 
60 FR 50466, Sept. 29, 1995; 60 FR 54106, Oct. 19, 1995; USCG-2005-
23172, 70 FR 75734, Dec. 21, 2005; USCG-2007-29018, 72 FR 53967, Sept. 
21, 2007; USCG-2013-0671, 78 FR 60155, Sept. 30, 2013; USCG-2016-0498, 
82 FR 35092, July 28, 2017]



Sec.  154.24  Foreign flag vessel: IMO Certificate.

    (a) An IMO Certificate issued under the IMO Resolution 
A.328(IX),''Code for the Construction and Equipment of Ships Carrying 
Liquefied Gases in Bulk, 1975'' is usually sufficient evidence of 
compliance with this part for the Coast Guard to endorse a foreign flag 
vessel's Certificate of Compliance with the name of each cargo in Table 
4 (follows Sec.  154.1872) that is listed on the IMO Certificate, if the 
information listed in item 3 of the IMO Certificate shows that--

[[Page 298]]

    (1) The design ambient temperatures meet Sec.  154.174 and Sec.  
154.176;
    (2) The cargo tank design stress factors and resulting MARVS of 
independent tanks type B or C meet Sec.  154.447 or Sec.  154.450; and
    (3) The cargo tank MARVS of a type IIPG ship meets Sec.  172.175(c) 
of this chapter.
    (b) If a foreign flag existing gas vessel meets Sec.  154.12 (b), 
(c), or (d), the vessel's IMO Certificate issued under the IMO ``Code 
for Existing Ships Carrying Liquefied Gases in Bulk, 1975'' is usually 
sufficient evidence of compliance with the requirements of Sec.  
154.12(e) for the Coast Guard to endorse the Certificate of Compliance 
with the name of each cargo in Table 4 (follows Sec.  154.1872) that is 
listed on the IMO Certificate; however if a foreign flag existing gas 
vessel does not meet Sec.  154.12 (b), (c), or (d), an IMO Certificate 
issued under the IMO ``Code for Existing Ships Carrying Liquefied Gases 
in Bulk, 1975'' is not acceptable evidence of compliance with the 
requirements of this part for the endorsement of a Certificate of 
Compliance.



Sec.  154.30  [Reserved]



Sec.  154.32  Equivalents.

    (a) A vessel that fails to meet the standards in this part for an 
endorsement on a Certificate of Inspection or a Certificate of 
Compliance may meet an alternate standard if the Commandant (CG-ENG) 
finds that the alternate standard provides an equivalent or greater 
level of protection for the purpose of safety.
    (b) The Commandant (CG-ENG) considers issuance of a finding of 
equivalence to the standard required by this part if the person 
requesting the finding submits a written application to the Commandant 
(CG-ENG) that includes--
    (1) A detailed explanation of the vessel's characteristics that do 
not meet the requirements in this part; and
    (2) An explanation of how each substituted standard would enable the 
vessel to meet a level of safety that would be equivalent to or greater 
than the standard in this part.
    (c) Operational methods or procedures may not be substituted for a 
particular fitting, material, appliance, apparatus, item, or type of 
equipment required in this part.



Sec.  154.34  Special approval: Requests.

    Each request for special approval must be in writing and submitted 
to the Commandant (CG-ENG), Attn: Office of Design and Engineering 
Systems, U.S. Coast Guard Stop 7509, 2703 Martin Luther King Jr. Avenue 
SE., Washington, DC 20593-7509.

[CGD 77-069, 52 FR 31626, Aug. 21, 1987, as amended by USCG-2013-0671, 
78 FR 60155, Sept. 30, 2013]



Sec.  154.36  Correspondence and vessel information: Submission.

    Correspondence to the Coast Guard and all vessel information 
submitted to the Coast Guard must be in English, except--
    (a) IMO Certificates may be in French; and
    (b) SOLAS Certificates may be in the official language of the flag 
administration.



Sec.  154.40  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 50381, Dec. 6, 1989]



                     Subpart B_Inspections and Tests

            Examination Requirements for Foreign Flag Vessels



Sec.  154.150  Examination required for a Certificate of Compliance.

    Before a vessel receives an initial or reissued Certificate of 
Compliance endorsed with the name of a cargo from Table 4 of this part, 
the vessel must call at a United States port for an examination, during 
which the Officer in Charge, Marine Inspection, determines whether or 
not the vessel meets the requirements of this chapter.

[CGD 81-052, 50 FR 8734, Mar. 5, 1985]

[[Page 299]]



Sec.  154.151  Procedures for having the Coast Guard examine a vessel
for a Certificate of Compliance.

    To have the Coast Guard examine the vessel for a Certificate of 
Compliance, as required in Sec.  154.150, the owner of a foreign flag 
vessel must proceed as follows:
    (a) After submitting an application under Sec.  154.22, await 
notification by the Commanding Officer, Marine Safety Center that review 
of the vessel's plans or IMO Certificate and supporting documents is 
complete.
    (b) Except when paragraph (c) of this section applies,
    (1) After receiving notification from Commanding Officer, Marine 
Safety Center that review is complete and the application is acceptable, 
dispatch the vessel to a United States port;
    (2) Notify the Officer in Charge, Marine Inspection, for the port 
where the vessel is to be inspected at least seven days before the 
vessel arrives and arrange the exact time and other details of the 
examination. This notification is in addition to any other pre-arrival 
notice to the Coast Guard required by other regulations and must 
include:
    (i) The name of the vessel's first U.S. port of call;
    (ii) The date the vessel is scheduled to arrive;
    (iii) The name and telephone number of the owner's local agent; and
    (iv) The names of all cargoes listed in Table 4 of this part that 
are on board the vessel;
    (3) Make sure that the following items are available on board the 
vessel for the use of the Marine Inspector before beginning the 
examination required by Sec.  154.150:
    (i) A general arrangement (including the location of firefighting, 
safety, and lifesaving gear); and
    (ii) The cargo manual required by Sec.  154.1810.
    (c) If the vessel was accepted for U.S. service on the basis of 
Coast Guard plan review under Sec.  154.22(b), the vessel owner must 
notify Commanding Officer, Marine Safety Center 14 days prior to the 
vessel's arrival at a U.S. port. This notification must include:
    (1) The name of the vessel's first U.S. port of call;
    (2) The date the vessel is scheduled to arrive;
    (3) The name and telephone number of the owner's local agent; and
    (4) The names of all cargoes listed in Table 4 of this part that are 
on board the vessel.

[CGD 81-052, 50 FR 8734, Mar. 5, 1985; 50 FR 15895, Apr. 23, 1985; CGD 
77-069, 52 FR 31630, Aug. 21, 1987; CGD 95-072, 60 FR 50466, Sept. 29, 
1995; 60 FR 54106, Oct. 19, 1995; USCG-2013-0671, 78 FR 60155, Sept. 30, 
2013]



              Subpart C_Design, Construction and Equipment

                             Hull Structure



Sec.  154.170  Outer hull steel plating.

    (a) Except as required in paragraph (b) of this section, the outer 
hull steel plating, including the shell and deck plating must meet the 
material standards of the American Bureau of Shipping published in 
``Rules for Building and Classing Steel Vessels'' 1981.
    (b) Along the length of the cargo area, grades of steel must be as 
follows:
    (1) The deck stringer and sheer strake must be at least Grade E 
steel or a grade of steel that has equivalent chemical properties, 
mechanical properties, and heat treatment, and that is specially 
approved by the Commandant (CG-ENG).
    (2) The strake at the turn of the bilge must be Grade D, Grade E, or 
a grade of steel that has equivalent chemical properties, mechanical 
properties, and heat treatment, and that is specially approved by the 
Commandant (CG-ENG).
    (3) The outer hull steel of vessels must meet the standards in Sec.  
154.172 if the hull steel temperature is calculated to be below -5 
[deg]C (23 [deg]F) assuming:
    (i) For any waters in the world, the ambient cold conditions of 
still air at 5 [deg]C (41 [deg]F) and still sea water at 0 [deg]C (32 
[deg]F);
    (ii) For cargo containment systems with secondary barriers, the 
temperature of the secondary barrier is the design temperature; and

[[Page 300]]

    (iii) For cargo containment systems without secondary barriers, the 
temperature of the cargo tank is the design temperature.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]



Sec.  154.172  Contiguous steel hull structure.

    (a) Except as allowed in paragraphs (b) and (c) of this section, 
plates, forgings, forged and rolled fittings, and rolled and forged bars 
and shapes used in the construction of the contiguous steel hull 
structure must meet the thickness and steel grade in Table 1 for the 
temperatures under Sec. Sec.  154.174(b) and 154.176(b).
    (b) for a minimum temperature, determined under Sec. Sec.  
154,174(b) and 154.176(b), below -25 [deg]C (-13 [deg]F), the contiguous 
steel hull structure must meet Sec.  54.25-10 for that minimum 
temperature.
    (c) If a steel grade that is not listed in Table 1 has the 
equivalent chemical properties, mechanical properties, and heat 
treatment of a steel grade that is listed, the steel grade not listed 
may be specially approved by the Commandant (CG-ENG), for use in the 
contiguous hull structure.

 Table 1--Minimum Temperature, Thickness, and Steel Grades in Contiguous
                             Hull Structures
------------------------------------------------------------------------
       Minimum temperature          Steel thickness     Steel \1\ grade
------------------------------------------------------------------------
0 [deg]C (32 [deg]F)............  All...............  Standards of the
                                                       American Bureau
                                                       of Shipping
                                                       published in
                                                       ``Rules for
                                                       Building and
                                                       Classing Steel
                                                       Vessels'', 1981
-10 [deg]C (14 [deg]F)..........  T<=112.5 mm (\1/2\  B
                                   in.).
                                  12.525.5 mm  E
                                   (1 in.).
-25 [deg]C (-13 [deg]F).........  t<=112.5 mm (\1/2\  D
                                   in.).
                                  12.5 mm  E
                                   (\1/2\ in.).
------------------------------------------------------------------------
\1\ Steel grade of the American Bureau of Shipping published in ``Rules
  for Building and Classing Steel Vessels'', 1981.


[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]



Sec.  154.174  Transverse contiguous hull structure.

    (a) The transverse contiguous hull structure of a vessel having 
cargo containment systems without secondary barriers must meet the 
standards of the American Bureau of Shipping published in ``Rules for 
Building and Classing Steel Vessels'', 1981.
    (b) The transverse contiguous hull structure of a vessel having 
cargo containment systems with secondary barriers must be designed for a 
temperature that is:
    (1) Colder than the calculated temperature of this hull structure 
when:
    (i) The temperature of the secondary barrier is the design 
temperature, and
    (ii) The ambient cold condition under Sec.  154.176(b)(1)(ii) and 
(iii) are assumed; or
    (2) Maintained by the heating system under Sec.  154.178.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.176  Longitudinal contiguous hull structure.

    (a) The longitudinal contiguous hull structure of a vessel having 
cargo containment systems without secondary barriers must meet the 
standards of the American Bureau of Shipping published in ``Rules for 
Building and Classing Steel Vessels'', 1981.
    (b) The longitudinal contiguous hull structure of a vessel having 
cargo containment systems with secondary barriers must be designed for a 
temperature that is:
    (1) Colder than the calculated temperature of this hull structure 
when:
    (i) The temperature of the secondary barrier is the design 
temperature; and
    (ii) For any waters in the world except Alaskan waters, the ambient 
cold condition of:
    (A) Five knots air at -18 [deg]C (0 [deg]F); and
    (B) Still sea water at 0 [deg]C (32 [deg]F); or
    (iii) For Alaskan waters the ambient cold condition of:
    (A) Five knots air at -29 [deg]C (-20 [deg]F); and
    (B) Still sea water at -2 [deg]C (28 [deg]F); or
    (2) Maintained by the heating system under Sec.  154.178, if, 
without heat, the contiguous hull structure is designed

[[Page 301]]

for a temperature that is colder than the calculated temperature of the 
hull structure assuming the:
    (i) Temperature of the secondary barrier is the design temperature; 
and
    (ii) Ambient cold conditions of still air at 5 [deg]C (41 [deg]F) 
and still sea water at 0 [deg]C (32 [deg]F).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.178  Contiguous hull structure: Heating system.

    The heating system for transverse and longitudinal contiguous hull 
structure must:
    (a) Be shown by a heat load calculation to have the heating capacity 
to meet Sec.  154.174(b)(2) or Sec.  154.176(b)(2);
    (b) Have stand-by heating to provide 100% of the required heat load 
and distribution determined under paragraph (a); and
    (c) Meet Parts 52, 53, and 54 of this chapter.



Sec.  154.180  Contiguous hull structure: Welding procedure.

    Welding procedure tests for contiguous hull structure designed for a 
temperature colder than -18 [deg]C (0 [deg]F) must meet Sec.  54.05-15 
and subpart 57.03 of this chapter.



Sec.  154.182  Contiguous hull structure: Production weld test.

    If a portion of the contiguous hull structure is designed for a 
temperature colder than -34 [deg]C (-30 [deg]F) and is not part of the 
secondary barrier, each 100m (328 ft.) of full penetration butt welded 
joints in that portion of the contiguous hull structure must pass the 
following production weld tests in the position that the joint is 
welded:
    (a) Bend tests under Sec.  57.06-4 of this chapter.
    (b) A Charpy V-notch toughness test under Sec.  57.06-5 of this 
chapter on one set of 3 specimens alternating the notch location on 
successive tests between the center of the weld and the most critical 
location in the heat affected zone. \2\
---------------------------------------------------------------------------

    \2\ The most critical location in the heat affected zone of the weld 
is based on procedure qualification results, except austenitic stainless 
steel need have notches only in the center of the weld.
---------------------------------------------------------------------------

    (c) If the contiguous hull structure does not pass the test under 
paragraph (b) of this section, the retest procedures under Sec.  54.05-
5(c) must be met.



Sec.  154.188  Membrane tank: Inner hull steel.

    For a vessel with membrane tanks, the inner hull plating thickness 
must meet the deep tank requirements of the American Bureau of Shipping 
published in ``Rules for Building and Classing Steel Vessels'', 1981.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.195  Aluminum cargo tank: Steel enclosure.

    (a) An aluminum cargo tank and its dome must be enclosed by the 
vessel's hull structure or a separate steel cover.
    (b) The steel cover for the aluminum cargo tank must meet the steel 
structural standards of the American Bureau of Shipping published in 
``Rules for Building and Classing Steel Vessels'', 1981.
    (c) The steel cover for the aluminum tank dome must be:
    (1) At least 3.2 mm (\1/8\ in.) thick;
    (2) Separated from the tank dome, except at the support points; and
    (3) Thermally isolated from the dome.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]

            Ship Survival Capability and Cargo Tank Location



Sec.  154.200  Stability requirements: General.

    Each vessel must meet the applicable requirements in subchapter S of 
this chapter.

[CGD 79-023, 48 FR 51009, Nov. 4, 1983]



Sec.  154.235  Cargo tank location.

    (a) For type IG hulls, cargo tanks must be located inboard of:
    (1) The transverse extent of damage for collision penetration 
specified in Table 172.180 of this chapter;

[[Page 302]]

    (2) The vertical extent of damage for grounding penetration 
specified in Table 172.180 of this chapter; and
    (3) 30 inches (760 mm) from the shell plating.
    (b) For type IIG, IIPG, and IIIG hulls, cargo tanks must be located 
inboard of:
    (1) The vertical extent of damage for grounding penetration 
specified in Table 172.180 of this chapter; and
    (2) 30 inches (760 mm) from the shell plating.
    (c) In vessels having membrane and semi-membrane tanks, the vertical 
and transverse extents of damage must be measured to the inner hull.
    (d) For type IIG, IIPG, and IIIG hulls, cargo tank suction wells may 
penetrate into the area of bottom damage specified as the vertical 
extent of damage for grounding penetration in Table 172.180 of this 
chapter if the penetration is the lesser of 25% of the double bottom 
height or 13.8 in. (350 mm).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 79-023, 48 FR 
51010, Nov. 4, 1983]

                            Ship Arrangements



Sec.  154.300  Segregation of hold spaces from other spaces.

    Hold spaces must be segregated from machinery and boiler spaces, 
accommodation, service and control spaces, chain lockers, potable, 
domestic and feed water tanks, store rooms and spaces immediately below 
or outboard of hold spaces by a:
    (a) Cofferdam, fuel oil tank, or single gastight A-60 Class Division 
of all welded construction in a cargo containment system not required by 
this part to have a secondary barrier;
    (b) Cofferdam or fuel oil tank in a cargo containment system 
required by this part to have a secondary barrier; or
    (c) If there are no sources of ignition or fire hazards in the 
adjoining space, single gastight A-O Class Division of all welded 
construction.



Sec.  154.305  Segregation of hold spaces from the sea.

    In vessels having cargo containment systems required by this part to 
have a secondary barrier, hold spaces must be segregated from the sea 
by:
    (a) A double bottom if the cargo tanks meet this part for design 
temperatures colder than -10 [deg]C (14 [deg]F); and
    (b) Wing tanks if the cargo tanks meet this part for design 
temperatures colder than -55 [deg]C (-67 [deg]F).



Sec.  154.310  Cargo piping systems.

    Cargo liquid or vapor piping must:
    (a) Be separated from other piping systems, except where an 
interconnection to inert gas or purge piping is required by Sec.  
154.901(a);
    (b) Not enter or pass through any accommodation, service, or control 
space;
    (c) Except as allowed under Sec.  154.703, not enter or pass through 
a machinery space other than a cargo pump or compressor room;
    (d) Be in the cargo area except:
    (1) As allowed under Sec.  154.703;
    (2) Bow and stern loading piping; and
    (3) Emergency jettisoning piping.
    (e) Be above the weather deck except:
    (1) As allowed under Sec.  154.703;
    (2) Pipes in a trunk traversing void spaces above a cargo 
containment system; and
    (3) Pipes for draining, venting, or purging interbarrier and hold 
spaces;
    (f) Connect into the cargo containment system above the weather deck 
except:
    (1) Pipes in a trunk traversing void spaces above a cargo 
containment system; and
    (2) Pipes for draining, venting, or purging interbarrier and hold 
spaces.
    (g) Be inboard of the transverse cargo tank location required by 
Sec.  154.235, except for athwartship shore connection manifolds not 
subject to internal pressure at sea.



Sec.  154.315  Cargo pump and cargo compressor rooms.

    (a) Cargo pump rooms and cargo compressor rooms must be above the 
weather deck and must be within the cargo area.
    (b) Where pumps and compressors are driven by a prime mover in an 
adjacent gas safe space:
    (1) The bulkhead or deck must be gastight; and
    (2) The shafting passing through the bulkhead or deck must be sealed 
by a

[[Page 303]]

fixed oil reservoir gland seal, a pressure grease seal, or another type 
of positive pressure seal specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.320  Cargo control stations.

    (a) Cargo control stations must be above the weather deck.
    (b) If a cargo control station is in accommodation, service, or 
control spaces or has access to such a space, the station must:
    (1) Be a gas safe space;
    (2) Have an access to the space that meets Sec.  154.330; and
    (3) Have indirect reading instrumentation, except for gas detectors.
    (c) Cargo control stations, including a room or area, must contain 
all alarms, indicators, and remote controls associated with each cargo 
tank that the station controls.



Sec.  154.325  Accommodation, service, and control spaces.

    (a) Accommodation, service, and control spaces must be outside the 
cargo area.
    (b) If a hold space having a cargo containment system, required by 
this part to have a secondary barrier, is separated from any 
accommodation, service, or control space by a cruciform joint, there 
must be a cofferdam providing at least 760 mm (30 inches) by 760 mm (30 
inches) clearance on one side of the cruciform joint.



Sec.  154.330  Openings to accommodation, service, or control spaces.

    (a) Entrances, forced or natural ventilation intakes and exhausts, 
and other openings to accommodation, service, or control spaces, except 
as allowed in paragraph (c) of this section, must be:
    (1) At least L/25 or 3.05m (10 ft) from the athwartship bulkhead 
facing the cargo area, whichever is farther, except that the distance 
need not exceed 5m (16.4 ft); and
    (2) On a house athwartship bulkhead not facing the cargo area or on 
the outboard side of the house.
    (b) Each port light, located on the athwartship bulkhead of a house 
facing the cargo area or the house sides within the distance specified 
in paragraph (a)(1) of this section, must be a fixed type.
    (c) Wheelhouse doors and windows that are not fixed may be within 
the distance specified in paragraph (a)(1) of this section from the 
athwartship bulkhead of a house facing the cargo area, if they have 
gaskets and pass a tightness test with a fire hose at not less than 207 
kPa gauge (30 psig).
    (d) Port lights in the hull plating below the uppermost continuous 
deck and in the first tier of the superstructure must be a fixed type.
    (e) Air intakes and openings into accommodation, service, and 
control spaces must have metal closures that pass a tightness test with 
a fire hose at not less than 207 kPa gauge (30 psig).
    (f) On liquefied toxic gas vessels, the closures required in 
paragraph (e) of this section must be capable of being closed from 
inside the space.



Sec.  154.340  Access to tanks and spaces in the cargo area.

    (a) Each cargo tank must have a manhole from the weather deck, the 
clear opening of which is at least 600 mm by 600 mm (23.6 in. by 23.6 
in.).
    (b) Each access into and through a void space or other gas-dangerous 
space in the cargo area, except spaces described in paragraph (e) of the 
definition for ``gas-dangerous space'' in Sec.  154.7, must--
    (1) Have a clear opening of at least 600 mm by 600 mm (23.6 in. by 
23.6 in.) through horizontal openings, hatches, or manholes;
    (2) Have a clear opening of at least 600 mm by 800 mm (23.6 in. by 
31.5 in.) through bulkheads, frames or other vertical structural 
members; and
    (3) Have a fixed ladder if the lower edge of a vertical opening is 
more than 600 mm (23.6 in.) above the deck or bottom plating.
    (c) Each access trunk in the cargo area must be at least 760 mm (30 
in.) in diameter.
    (d) The lower edge of each access from the weather deck to gas-safe 
spaces in the cargo area must be at least 2.4 m (7.9 ft.) above the 
weather deck or the access must be through an air lock that meets Sec.  
154.345.

[[Page 304]]

    (e) The inner hull in the cargo area must be accessible for 
inspection from at least one side without the removal of any fixed 
structure or fitting.
    (f) The hold space insulation in the cargo area must be accessible 
for inspection from at least one side from within the hold space or 
there must be a means, that is specially approved by the Commandant, of 
determining from outside the hold space whether or not the hold space 
insulation meets this part.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.345  Air locks.

    (a) An air lock may be used for access from a gas-dangerous zone on 
the weather deck to a gas-safe space.
    (b) Each air lock must:
    (1) Consist of two steel doors, at least 1.5 m (4.9 ft.) but not 
more than 2.5 m (8.2 ft.) apart, each gasketed and tight when tested 
with a fire hose at not less 207 kPa gauge (30 psig);
    (2) Have self-closing doors with no latches or other devices for 
holding them open;
    (3) Have an audible and visual alarm on both sides which are 
actuated when both door securing devices are in other than the fully 
closed position at the same time;
    (4) Have mechanical ventilation in the space between the doors from 
a gas-safe area;
    (5) Have a pressure greater than that of the gas-dangerous area on 
the weather deck;
    (6) Have the rate of air change in the space between the doors of at 
least 8 changes per hour; and
    (7) Have the space between the doors monitored for cargo vapor leaks 
under Sec.  154.1350.
    (c) In addition to the requirements of paragraphs (a) and (b) of 
this section, no gas-safe space on a liquefied flammable gas carrier may 
have an air lock unless the space:
    (1) Is mechanically ventilated to make the pressure in the space 
greater than that in the air lock; and
    (2) Has a means of automatically de-energizing all electrical 
equipment that is not explosion-proof in the space when the pressure in 
the space falls to or below the pressure in the air lock.



Sec.  154.350  Bilge and ballast systems in the cargo area.

    (a) Hold, interbarrier, and insulation spaces must have a means of 
sounding the space or other means of detecting liquid leakage specially 
approved by the Commandant (CG-ENG).
    (b) Each hold and insulation space must have a bilge drainage 
system.
    (c) Interbarrier spaces must have an eductor or pump for removing 
liquid cargo and returning it to the cargo tanks or to an emergency 
jettisoning system meeting Sec.  154.356.
    (d) Spaces in the cargo containment portion of the vessel, except 
ballast spaces and gas-safe spaces, must not connect to pumps in the 
main machinery space.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.355  Bow and stern loading piping.

    (a) Bow and stern loading piping must:
    (1) Meet Sec.  154.310;
    (2) Be installed in an area away from the accommodation, service, or 
control space on type IG hulls;
    (3) Be clearly marked;
    (4) Be segregated from the cargo piping by a removable spool piece 
in the cargo area or by at least two shut-off valves in the cargo area 
that have means of locking to meet Sec.  154.1870(a);
    (5) Have a means for checking for cargo vapor between the two valves 
under paragraph (a)(4) of this section;
    (6) Have fixed inert gas purging lines; and
    (7) Have fixed vent lines for purging with inert gas to meet Sec.  
154.1870(b).
    (b) Entrances, forced or natural ventilation intakes, exhausts, and 
other openings to accommodation, service, or control spaces that face 
the bow or stern loading area must meet Sec.  154.330.



Sec.  154.356  Cargo emergency jettisoning piping.

    Emergency jettisoning piping must:
    (a) Meet Sec.  154.355(a);
    (b) Be designed to allow cargo discharge without the outer hull 
steel

[[Page 305]]

temperature falling below the minimum temperatures under Sec. Sec.  
154.170 and 154.172; and
    (c) Be specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                        Cargo Containment Systems



Sec.  154.401  Definitions.

    As used in Sec. Sec.  154.440 and 154.447:
    ``[sigma]Y'' means the minimum yield strength of the tank 
material, including weld metal, at room temperature.
    ``[sigma]B'' means minimum tensile strength of the tank 
material, including weld metals, at room temperature.



Sec.  154.405  Design vapor pressure (Po) of a cargo tank.

    (a) The design vapor pressure (Po) of a cargo tank must 
be equal to or greater than the MARVS.
    (b) The Po of a cargo tank must be equal to or greater 
than the vapor pressure of the cargo at 45 [deg]C (113 [deg]F) if:
    (1) The cargo tank has no temperature control for the cargo; and
    (2) The vapor pressure of the cargo results solely from ambient 
temperature.
    (c) The Po of a cargo tank may be exceeded under harbor 
conditions if specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.406  Design loads for cargo tanks and fixtures: General.

    (a) Calculations must show that a cargo tank and its fixtures are 
designed for the following loads:
    (1) Internal pressure head.
    (2) External pressure load.
    (3) Dynamic loads resulting from the motion of the vessel.
    (4) Transient or stationary thermal loads if the design temperature 
is colder than -55 [deg]C (-67 [deg]F) or causes thermal stresses in 
cargo tank supports.
    (5) Sloshing loads, if the cargo tank is designed for partial loads.
    (6) Loads resulting from vessel's deflection.
    (7) Tank weight, cargo weight, and corresponding support reaction.
    (8) Insulation weight.
    (9) Loads of a pipe tower and any other attachments to the cargo 
tank.
    (10) Vapor pressure loads in harbor conditions allowed under Sec.  
154.405.
    (11) Gas pressurization if the cargo tank is designed for gas 
pressurization as a means of cargo transfer.
    (b) A cargo tank must be designed for the most unfavorable static 
heel angle within a 0[deg] to 30[deg] range without exceeding the 
allowable stress of the material.
    (c) A hydrostatic or hydropneumatic test design load must be 
specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  154.407  Cargo tank internal pressure head.

    (a) For the calculation required under Sec.  154.406(a)(1) and (b), 
the internal pressure head (heq), must be determined from the 
following formula:

heq = 10 Po + (hgd)max

where:

hgd (the value of internal pressure, in meters of fresh 
          water, resulting from the combined effects of gravity and 
          dynamic accelerations of a full tank) = a[beta] Z[beta] Y;

where:

a[beta] = dimensionless acceleration relative to the acceleration of 
          gravity resulting from gravitational and dynamic loads in the 
          [beta] direction (see figure 1);
Z[beta] = largest liquid height (m) above the point where the pressure 
          is to be determined in the [beta] direction (see figure 2);
Y = maximum specific weight of the cargo (t/m\3\) at the design 
          temperature.

[[Page 306]]

[GRAPHIC] [TIFF OMITTED] TC02FE91.083


[[Page 307]]


[GRAPHIC] [TIFF OMITTED] TC02FE91.084

    (b) The (hgd) max is determined for the [beta] 
direction, on the ellipse in Figure 1, which gives the maximum value for 
hgd.
    (c) When the longitudinal acceleration is considered in addition to 
the vertical transverse acceleration, an ellipsoid must be used in the 
calculations instead of the ellipse contained in Figure 1.



Sec.  154.408  Cargo tank external pressure load.

    For the calculation required under Sec.  154.406 (a)(2) and (b), the 
external pressure load must be the difference between the minimum 
internal pressure (maximum vacuum), and the maximum external pressure to 
which any portion of the cargo tank may be simultaneously subjected.



Sec.  154.409  Dynamic loads from vessel motion.

    (a) For the calculation required under Sec.  154.406 (a)(3) and (b), 
the dynamic loads must be determined from the long term distribution of 
vessel motions, including the effects of surge, sway, heave, roll, 
pitch, and yaw on irregular seas that the vessel may experience during 
10\8\ wave encounters. The speed used for this calculation may be 
reduced from the ship service speed if specially approved by the 
Commandant

[[Page 308]]

(CG-ENG) and if that reduced speed is used in the hull strength 
calculation under Sec.  31.10-5(c) of this chapter.
    (b) If the loads determined under paragraphs (c), (d), or (e) of 
this section result in a design stress that is lower than the allowable 
stress of the material under Sec. Sec.  154.610, 154.615, or 154.620, 
the allowable stress must be reduced to that stress determined in 
paragraphs (c), (d), or (e).
    (c) If a tank is designed to avoid plastic deformation and buckling, 
then acceleration components of the dynamic loads must be determined for 
the largest loads the vessel may experience during an operating life 
corresponding to the probability level of 10-8, by using one 
of the following methods:
    (1) Method 1 is a detailed analysis of the vessel's acceleration 
components.
    (2) Method 2 applies to vessels of 50 m (164 ft) or more in length 
and is an analysis by the following formulae that corresponds to a 
10-8 probability level in the North Atlantic:
    (i) Vertical acceleration under paragraph (f)(1) of this section:
    [GRAPHIC] [TIFF OMITTED] TC02FE91.085
    

[[Page 309]]


[GRAPHIC] [TIFF OMITTED] TC02FE91.086

    (d) If a cargo tank is designed to avoid fatigue, the dynamic loads 
determined under paragraph (a) of this section must be used to develop 
the dynamic spectrum.

[[Page 310]]

    (e) If a cargo tank is designed to avoid uncontrolled crack 
propagation, the dynamic loads are:
    (1) Determined under paragraph (a) of this section; and
    (2) For a load distribution for a period of 15 days by the method in 
Figure 3.
[GRAPHIC] [TIFF OMITTED] TC02FE91.087


[[Page 311]]


    (f) When determining the accelerations for dynamic loads under 
paragraph (a) of this section, the accelerations acting in a cargo tank 
must be estimated for the cargo tank's center of gravity and include the 
following component accelerations:
    (1) Vertical accelerations, meaning the motion acceleration of heave 
and pitch, and of any roll normal to the vessel base that has an effect 
on the component acceleration.
    (2) Transverse acceleration, meaning the motion acceleration of 
sway, yaw and roll, and gravity component of roll.
    (3) Longitudinal acceleration, meaning the motion acceleration of 
surge and pitch and gravity component of pitch.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.410  Cargo tank sloshing loads.

    (a) For the calculation required under Sec.  154.406 (a)(5) and (b), 
the determined sloshing loads resulting from the accelerations under 
Sec.  154.409(f) must be specially approved by the Commandant (CG-ENG).
    (b) If the sloshing loads affect the cargo tank scantlings, an 
analysis of the effects of the sloshing loads in addition to the 
calculation under paragraph (a) of this section must be specially 
approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.411  Cargo tank thermal loads.

    For the calculations required under Sec.  154.406(a)(4), the 
following determined loads must be specially approved by the Commandant 
(CG-ENG):
    (a) Transient thermal loads for the cooling down periods of cargo 
tanks for design temperatures lower than -55 [deg]C (-67 [deg]F).
    (b) Stationary thermal loads for cargo tanks for design temperatures 
lower than -55 [deg]C (-67 [deg]F) that cause high thermal stress.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.412  Cargo tank corrosion allowance.

    A cargo tank must be designed with a corrosion allowance if the 
cargo tank:
    (a) is located in a space that does not have inert gas or dry air; 
or
    (b) carries a cargo that corrodes the tank material.

    Note: Corrosion allowance for independent tank type C is contained 
in Sec.  54.01-35 of this chapter.

                             Integral Tanks



Sec.  154.418  General.

    An integral tank must not be designed for a temperature colder than 
-10 [deg]C (14 [deg]F), unless the tank is specially approved by the 
Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.419  Design vapor pressure.

    The Po of an integral tank must not exceed 24.5 kPa gauge 
(3.55 psig) unless special approval by the Commandant (CG-ENG) allows a 
Po between 24.5 kPa gauge (3.55 psig) and 69 kPa gauge (10 
psig).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.420  Tank design.

    (a) The structure of an integral tank must meet the deep tank 
scantling standards of the American Bureau of Shipping published in 
``Rules for Building and Classing Steel Vessels'', 1981.
    (b) The structure of an integral tank must be designed and shown by 
calculation to withstand the internal pressure determined under Sec.  
154.407.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.421  Allowable stress.

    The allowable stress for the integral tank structure must meet the 
American Bureau of Shipping's allowable stress for the vessel's hull 
published in

[[Page 312]]

``Rules for Building and Classing Steel Vessels'', 1981.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]

                             Membrane Tanks



Sec.  154.425  General.

    The design of the hull structure and the design of the membrane tank 
system, that includes the membrane tank, secondary barrier, including 
welds, the supporting insulation, and pressure control equipment, must 
be specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.426  Design vapor pressure.

    The Po of a membrane tank must not exceed 24.5 kPa gauge 
(3.55 psig) unless special approval by the Commandant (CG-ENG) allows a 
Po between 24.5 kPa gauge (3.55 psig) and 69 kPa gauge (10 
psig).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.427  Membrane tank system design.

    A membrane tank system must be designed for:
    (a) Any static and dynamic loads with respect to plastic deformation 
and fatigue;
    (b) Combined strains from static, dynamic, and thermal loads;
    (c) Preventing collapse of the membrane from:
    (1) Over-pressure in the interbarrier space;
    (2) Vacuum in the cargo tank;
    (3) Sloshing in a partially filled cargo tank; and
    (4) Hull vibrations; and
    (d) The deflections of the vessel's hull.



Sec.  154.428  Allowable stress.

    The membrane tank and the supporting insulation must have allowable 
stresses that are specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.429  Calculations.

    The tank design load calculations for a membrane tank must include 
the following:
    (a) Plastic deformation and fatigue life resulting from static and 
dynamic loads in the membrane and the supporting insulation.
    (b) The response of the membrane and its supporting insulation to 
vessel motion and acceleration under the worst weather conditions. 
Calculations from a similar vessel may be submitted to meet this 
paragraph.
    (c) The combined strains from static, dynamic, and thermal loads.



Sec.  154.430  Material test.

    (a) The membrane and the membrane supporting insulation must be made 
of materials that withstand the combined strains calculated under Sec.  
154.429(c).
    (b) Analyzed data of a material test for the membrane and the 
membrane supporting insulation must be submitted to the Commandant (CG-
ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.431  Model test.

    (a) The primary and secondary barrier of a membrane tank, including 
the corners and joints, must withstand the combined strains from static, 
dynamic, and thermal loads calculated under Sec.  154.429(c).
    (b) Analyzed data of a model test for the primary and secondary 
barrier of the membrane tank must be submitted to the Commandant (CG-
ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.432  Expansion and contraction.

    The support system of a membrane tank must allow for thermal and 
physical expansion and contraction of the tank.

[[Page 313]]

                           Semi-Membrane Tanks



Sec.  154.435  General.

    (a) The design of a semi-membrane tank, the supporting insulation 
for the tank, and the supporting hull structure for the tank must be 
specially approved by the Commandant (CG-ENG).
    (b) A semi-membrane tank must be designed to meet:
    (1) Sec.  154.425 through Sec.  154.432;
    (2) Sec.  154.437 through Sec.  154.440; or
    (3) Sec.  154.444 through Sec.  154.449.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.436  Design vapor pressure.

    The Po of a semi-membrane tank must not exceed 24.5 kPa 
gauge (3.55 psig) unless special approval by the Commandant (CG-ENG) 
allows a Po between 24.5 kPa gauge (3.55 psig) and 69 kPa 
gauge (10 psig).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                         Independent Tank Type A



Sec.  154.437  General.

    An independent tank type A must meet Sec.  154.438 through Sec.  
154.440.



Sec.  154.438  Design vapor pressure.

    (a) If the surface of an independent tank type A are mostly flat 
surfaces, the Po must not exceed 69 kPa gauge (10 psig).
    (b) If the surfaces of an independent tank type A are formed by 
bodies of revolution, the design calculation of the Po must 
be specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]



Sec.  154.439  Tank design.

    An independent tank type A must meet the deep tank standard of the 
American Bureau of Shipping published in ``Rules for Building and 
Classing Steel Vessels'', 1981, and must:
    (a) Withstand the internal pressure determined under Sec.  154.407;
    (b) Withstand loads from tank supports calculated under Sec. Sec.  
154.470 and 154.471; and
    (c) Have a corrosion allowance that meets Sec.  154.412.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.440  Allowable stress.

    (a) The allowable stresses for an independent tank type A must:
    (1) For tank web frames, stringers, or girders of carbon manganese 
steel or aluminum alloys, meet [sigma]B/2.66 or 
[sigma]Y/1.33, whichever is less; and
    (2) For other materials, be specially approved by the Commandant 
(CG-ENG).
    (b) A greater allowable stress than required in paragraph (a)(1) of 
this section may be specially approved by the Commandant (CG-ENG) if the 
equivalent stress ([sigma]c) is calculated from the formula 
in appendix A of this part.
    (c) Tank plating must meet the American Bureau of Shipping's deep 
tank standards, for an internal pressure head that meets Sec.  
154.439(a), published in ``Rules for Building and Classing Steel 
Vessels'', 1981.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; CGD 77-069, 52 FR 31630, Aug. 21, 1987]

                         Independent Tank Type B



Sec.  154.444  General.

    An independent tank type B must be designed to meet Sec. Sec.  
154.445 through 154.449.



Sec.  154.445  Design vapor pressure.

    If the surfaces of an independent tank type B are mostly flat 
surfaces, the Po must not exceed 69 kPa gauge (10 psig).



Sec.  154.446  Tank design.

    An independent tank type B must meet the calculations under Sec.  
154.448.



Sec.  154.447  Allowable stress.

    (a) An independent tank type B designed from bodies of revolution 
must

[[Page 314]]

have allowable stresses \3\ determined by the following formulae:
---------------------------------------------------------------------------

    \3\ See Appendix B for stress analyses definitions.

---------------------------------------------------------------------------
[sigma]m<=f

[sigma]L<=1.5 f

[sigma]b<=1.5 F

[sigma]L + [sigma]b<=1.5 F

[sigma]m + [sigma]b<=1.5 F

where:

[sigma]m = equivalent primary general membrane stress \4\
---------------------------------------------------------------------------

    \4\ See Appendix A for equivalent stress.
---------------------------------------------------------------------------

[sigma]L = equivalent primary local membrane stress \4\
[sigma]b = equivalent primary bending stress \4\
f = the lesser of ([sigma]B/A) or ([sigma]Y/B)
F = the lesser of ([sigma]B/C) or ([sigma]Y/D)
A, B, C, and D = stress factors in Table 2.

                   Table 2--Values for Stress Factors
------------------------------------------------------------------------
                                      Nickel
                                    steel and
                                      carbon     Austenitic    Aluminum
                                    manganese      steel        alloy
                                      steel        values       values
                                      values
------------------------------------------------------------------------
Stress factors:
  A..............................          4.0          4.0          4.0
  B..............................          2.0          1.6          1.5
  C..............................          3.0          3.0          3.0
  D..............................          1.5          1.5          1.5
------------------------------------------------------------------------

    (b) An independent tank type B designed from plane surfaces must 
have allowable stresses specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.448  Calculations.

    The following calculations for an independent tank type B must be 
specially approved by the Commandant (CG-ENG):
    (a) Plastic deformation, fatigue life, buckling, and crack 
propagation resulting from static and dynamic loads on the tank and its 
support.
    (b) A three-dimensional analysis of the stress exerted by the hull 
on the tank, its support, and its keys.
    (c) The response of the tank and its support to the vessel's motion 
and acceleration in irregular waves or calculations from a similar 
vessel.
    (d) A tank buckling analysis considering the maximum construction 
tolerance.
    (e) A finite element analysis using the loads determined under Sec.  
154.406.
    (f) A fracture mechanics analysis using the loads determined under 
Sec.  154.406.
    (g) The cumulative effects of the fatigue load from the following 
formula:
[GRAPHIC] [TIFF OMITTED] TC02FE91.088

where:

ni = the number of stress cycles at each stress level during 
          the life of the vessel;
Ni = the number of cycles to failure for corresponding stress 
          levels from the Wohler (S-N) curve;
Nj = the number of cycles to failure from the fatigue load by 
          loading and unloading the tank; and
Cw = 0.5 or less. A Cw of greater than 0.5 but not 
          exceeding 1.0 may be specially approved by the Commandant (G-
          MTH).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.449  Model test.

    The following analyzed data of a model test of structural elements 
for independent tank type B must be submitted to the Commandant (CG-ENG) 
for special approval:
    (a) Stress concentration factors.
    (b) Fatigue life.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

          Independent Tank Type C and Process Pressure Vessels



Sec.  154.450  General.

    Independent tanks type C and process pressure vessels must be 
designed to meet the requirements under Part 54 of this chapter, except 
Sec.  54.01-40(b), and:
    (a) The calculation under Sec.  54.01-18 (b)(1) must also include 
the design loads determined under Sec.  154.406;
    (b) The calculated tank plating thickness, including any corrosion 
allowance, must be the minimum thickness without a negative plate 
tolerance; and
    (c) The minimum tank plating thickness must not be less than:
    (1) 5mm (\3/16\ in.) for carbon-manganese steel and nickel steel;

[[Page 315]]

    (2) 3mm (\1/8\ in.) for austenitic steels; or
    (3) 7mm (\9/32\ in.) for aluminum alloys.



Sec.  154.451  Design vapor pressure.

    The Po (kPa) of an independent tank type C must be 
calculated by the following formula:

Po = 196 + AC([rho]) \3/2\

where:

A = 1.813 ([sigma]m/[Delta][sigma]A) 
          \2\;
[sigma]m = design primary membrane stress;
[Delta][sigma]A = (allowable dynamic membrane 
          stress for double amplitude at probability level Q = 
          10-8) 53.9 MPa (7821 psi) for ferritic and 
          martensitic steels and 24.5 MPa (3555 psi) for 5083-0 
          aluminum;
C = a characteristic tank dimension that is the greatest of h, 0.75b, or 
          0.45 l;

where:

h = the height of the tank or the dimension in the vessel's vertical 
          direction, in meters;
b = the width of the tank or the dimension in the vessel's transverse 
          direction; in meters; and
l = the length of the tank or the dimension in the vessel's longitudinal 
          direction, in meters; and
[rho] = the specific gravity of the cargo.



Sec.  154.452  External pressure.

    The design external pressure, Pe, for an independent tank 
type C must be calculated by the following formula:

Pe = P1 + P2 + P3 + 
P4

where:

P1 = the vacuum relief valve setting for tanks with a vacuum 
          relief valve, or 24.5 kPa gauge (3.55 psig) for tanks without 
          a vacuum relief valve.
P2 = 0, or the pressure relief valve setting for an enclosed 
          space containing any portion of a pressure vessel.
P3 = total compressive load in the tank shell from the weight 
          of the tank, including corrosion allowance, weight of 
          insulation, weight of dome, weight of pipe tower and piping, 
          the effect of the partially filled tank, the effect of 
          acceleration and hull deflection, and the local effect of 
          external and internal pressure.
P4 = 0, or the external pressure from the head of water from 
          any portion of the pressure vessel on exposed decks.



Sec.  154.453  Failure to meet independent tank type C standards.

    If the Commandant (CG-ENG) determines during plan review, that a 
tank designed as an independent tank type C fails to meet the standards 
under Sec.  154.450, Sec.  154.451, and 154.452 and cannot be redesigned 
to meet those standards, the tank may be redesigned as an independent 
tank type A or B.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58284, Sept. 29, 2014]

                            Secondary Barrier



Sec.  154.459  General.

    (a) Each cargo tank must have a secondary barrier that meets Table 3 
and except as allowed in Table 3, the hull must not be the secondary 
barrier.
    (b) If the Commandant (CG-ENG) specially approves an integral tank 
for a design temperature at atmospheric pressure lower than -10 [deg]C 
(14 [deg]F), the integral tank must have a complete secondary barrier 
that meets Sec.  154.460.
    (c) If the Commandant (CG-ENG) specially approves a semi-membrane 
tank under the requirements of an independent tank type B, the semi-
membrane tank may have a partial secondary barrier specially approved by 
the Commandant (CG-ENG).
    (d) If Table 3 allows the hull to be a secondary barrier, the 
vessel's hull must:
    (1) Meet Sec. Sec.  154.605 through 154.630; and
    (2) Be designed for the stresses resulting from the design 
temperature.

                                      Table 3--Secondary Barriers for Tanks
----------------------------------------------------------------------------------------------------------------
                                                    Cargo temperature (T) at atmospheric pressure
                                    ----------------------------------------------------------------------------
             Tank type                                       T<-10 [deg]C (14 [deg]F)=-10        thn-eq>=55 [deg]C (-67       T<-55 [deg]C (-67
                                       [deg]C (14 [deg]F)               [deg]F)                   [deg]F)
----------------------------------------------------------------------------------------------------------------
Integral...........................  No secondary barrier    Tank type not usually         Tank type not
                                      required.               allowed \1\.                  allowed.
Membrane...........................  ......do..............  Complete secondary barrier    Complete secondary
                                                              \1\.                          barrier.
Semi-membrane......................  ......do..............  ......do....................   Do.
Independent:
  Type A...........................  ......do..............  ......do....................   Do.
  Type B...........................  ......do..............  Partial secondary barrier     Partial secondary
                                                              \1\.                          barrier.

[[Page 316]]

 
  Type C...........................  ......do..............  No secondary barrier          No secondary barrier
                                                              required.                     required.
----------------------------------------------------------------------------------------------------------------
\1\ The hull may be a secondary barrier.


(14 U.S.C. 632; 46 U.S.C. 369, 375, and 416; 49 U.S.C. 1655(b); 49 CFR 
1.46(b))

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.460  Design criteria.

    At static angles of heel up through 30[deg], a secondary barrier 
must
    (a) If a complete secondary barrier is required in Sec.  154.459, 
hold all of the liquid cargo in the cargo tank for at least 15 days 
under the dynamic loads in Sec.  154.409(e);
    (b) If a partial secondary barrier is permitted in Sec.  154.459, 
hold any leakage of liquid cargo corresponding to the extent of failure 
under Sec.  154.448(a) after initial detection or primary barrier leak 
for at least 15 days under the dynamic loads in Sec.  154.409(e);
    (c) If the primary barrier fails, prevent the temperature of the 
vessel's structure from falling below the minimum allowable service 
temperature of the steel; and
    (d) Be designed so that a cargo tank failure does not cause a 
failure in the secondary barrier.

                               Insulation



Sec.  154.465  General.

    If the design temperature is below -10 [deg]C (14 [deg]F), the cargo 
tank insulation must prevent the temperature of the vessel's hull from 
cooling below the minimum temperature allowed under Sec.  154.172.



Sec.  154.466  Design criteria.

    (a) The insulation for a cargo tank without a secondary barrier must 
be designed for the cargo tank at the design temperature, and for a 
vessel operating in:
    (1) Any waters in the world, except Alaskan waters, for the ambient 
cold condition of:
    (i) Five knots air at -18 [deg]C (0 [deg]F); and
    (ii) Still sea water at 0 [deg]C (32 [deg]F); or
    (2) Alaskan waters for the ambient cold condition of:
    (i) Five knots air at -29 [deg]C (20 [deg]F); and
    (ii) Still sea water at -2 [deg]C (28 [deg]F).
    (b) The insulation for a cargo tank with a secondary barrier must be 
designed for the secondary barrier at the design temperature, and the 
ambient cold conditions listed under paragraph (a)(1) or paragraph 
(a)(2) of this section.
    (c) The insulation material must be designed for any loads 
transmitted from adjacent hull structure.
    (d) Insulation for cargo tank and piping must meet Sec.  38.05-20 of 
this chapter.
    (e) Powder or granulated insulation must:
    (1) Not compact from vibrations of the vessel;
    (2) Maintain the thermal conductivity listed under Sec.  154.467; 
and
    (3) Not exert a static pressure greater than the external design 
pressure of the cargo tank under Sec.  154.408.



Sec.  154.467  Submission of insulation information.

    The following insulation information must be submitted for special 
approval by the Commandant (CG-ENG):
    (a) Compatibility with the cargo.
    (b) Solubility in the cargo.
    (c) Absorption of the cargo.
    (d) Shrinkage.
    (e) Aging.
    (f) Closed cell content.
    (g) Density.
    (h) Mechanical properties.
    (i) Thermal expansion.
    (j) Abrasion.
    (k) Cohesion.
    (l) Thermal conductivity.
    (m) Resistance to vibrations.
    (n) Resistance to fire and flame spread.
    (o) The manufacturing and installation details of the insulation 
including:
    (1) Fabrication;

[[Page 317]]

    (2) Storage;
    (3) Handling;
    (4) Erection; and
    (5) Quality control.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                             Support System



Sec.  154.470  General.

    (a) A cargo tank must have a support system that:
    (1) prevents movement of the cargo tank under the static and dynamic 
loads in Sec.  154.406; and
    (2) allows the cargo tank to contract and expand from temperature 
variation and hull deflection without exceeding the design stress of the 
cargo tank and the hull.
    (b) The cargo tank support system must have a key that prevents 
rotation of the cargo tank.
    (c) An independent tank must have supports with an antifloatation 
system that withstands the upward force of the tank without causing 
plastic deformation that endangers the hull structure when the tank is:
    (1) Empty; and
    (2) In a hold space flooded to the summer load draft of the vessel.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 
FR 58285, Sept. 29, 2014]



Sec.  154.471  Design criteria.

    (a) The cargo tank support system must be designed:
    (1) For the loads in Sec.  154.406(a);
    (2) To not exceed the allowable stress under this part at a static 
angle of heel of 30[deg];
    (3) To withstand a collision force equal to at least one-half the 
weight of the cargo tank and cargo from forward and one-quarter the 
weight of the cargo tank and cargo from aft; and
    (4) For the largest resulting acceleration in Figure 1, including 
rotational and translation effects.
    (b) The cargo tank support design loads in paragraph (a) of this 
section may be analyzed separately.



Sec.  154.476  Cargo transfer devices and means.

    (a) If a cargo pump in a cargo tank is not accessible for repair 
when the cargo tank is in use, the cargo tank must have an additional 
means of cargo transfer, such as another pump or gas pressurization.
    (b) If cargo is transferred by gas pressurization, the pressurizing 
line must have a safety relief valve that is set at less than 90 percent 
of the tank relief valve setting.

                    Cargo and Process Piping Systems



Sec.  154.500  Cargo and process piping standards.

    The cargo liquid and vapor piping and process piping systems must 
meet the requirements in Sec. Sec.  154.503 through 154.562, Subparts 
56.01 through 56.35, Sec. Sec.  56.50-20 and 56.50-105, and Subparts 
56.60 through 56.97 of this chapter.



Sec.  154.503  Piping and piping system components: Protection from movement.

    Where thermal movement and movements of the cargo tank and the hull 
structure may cause stresses that exceed the design stresses, the piping 
and piping system components and cargo tanks must be protected from 
movement by:
    (a) Offsets;
    (b) Loops;
    (c) Bends;
    (d) Mechanical expansion joints including:
    (1) Bellows;
    (2) Slip joints;
    (3) Ball joints; or
    (e) Other means specially approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.506  Mechanical expansion joint: Limits in a piping system.

    Mechanical expansion joints in a piping system outside of a cargo 
tank:
    (a) May be installed only if offsets, loops or bends cannot be 
installed due to limited space or piping arrangement;
    (b) Must be a bellows type; and

[[Page 318]]

    (c) Must not have insulation or a cover unless necessary to prevent 
damage.



Sec.  154.512  Piping: Thermal isolation.

    Low temperature piping must be thermally isolated from any adjacent 
hull structure to prevent the temperature of that structure from 
dropping below the minimum temperature for the hull material under Sec.  
154.170.



Sec.  154.514  Piping: Electrical bonding.

    (a) Cargo tanks or piping that are separated from the hull structure 
by thermal isolation must be electrically bonded to the hull structure 
by a method under paragraph (c) of this section.
    (b) A pipe joint or a hose connection fitting that has a gasket must 
be electrically bonded by a method under paragraph (c) of this section 
that bonds:
    (1) Both sides of the connection to the hull structure; or
    (2) Each side of the connection to the other side.
    (c) An electrical bond must be made by at least one of the following 
methods:
    (1) A metal bonding strap attached by welding or bolting.
    (2) Two or more bolts that give metal to metal contact between the 
bolts and the parts to be bonded.
    (3) Metal to metal contact between adjacent parts under designed 
operating conditions.



Sec.  154.516  Piping: Hull protection.

    A vessel's hull must be protected from low temperature liquid 
leakage by a drip pan, or other means specially approved by the 
Commandant (CG-ENG), at:
    (a) Each piping connection dismantled on a routine basis;
    (b) Cargo discharge and loading manifolds; and
    (c) Pump seals.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.517  Piping: Liquid pressure relief.

    The cargo loading and discharge crossover headers, cargo hoses, and 
cargo loading arms must have means to relieve cargo pressure and to 
remove liquid cargo.



Sec.  154.519  Piping relief valves.

    (a) The liquid relief valve that protects the cargo piping system 
from liquid pressure exceeding the design pressure must discharge into:
    (1) A cargo tank; or
    (2) A cargo vent mast if that vent mast has a means for the 
detection and removal of the liquid cargo that is specially approved by 
the Commandant (CG-ENG).
    (b) A relief valve on a cargo pump that protects the cargo piping 
system must discharge into the pump suction.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.520  Piping calculations.

    A piping system must be designed to meet the allowable stress values 
under Sec.  56.07-10 of this chapter and, if the design temperature is -
110 [deg]C (-166 [deg]F) or lower, the stress analysis must be specially 
approved by the Commandant (CG-ENG) and must include:
    (a) Pipe weight loads;
    (b) Acceleration loads;
    (c) Internal pressure loads;
    (d) Thermal loads; and
    (e) Loads from the hull.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.522  Materials for piping.

    (a) The materials for piping systems must meet Sec.  154.625 for the 
minimum design temperature of the piping, except the material for open 
ended vent piping may be specially approved by the Commandant (CG-ENG) 
if:
    (1) The temperature of the cargo at the pressure relief valve 
setting is -55 [deg]C (-67 [deg]F) or warmer; and
    (2) Liquid cannot discharge to the vent piping.
    (b) Materials for piping outside the cargo tanks must have a melting 
point of at least 925 [deg]C (1697 [deg]F), except for

[[Page 319]]

short lengths of pipes with fire resisting insulation that are attached 
to the cargo tanks.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 
FR 58285, Sept. 29, 2014]



Sec.  154.524  Piping joints: Welded and screwed couplings.

    Pipe lengths without flanges must be joined by one of the following:
    (a) A butt welded joint with complete penetration at the weld root 
except that for design temperatures colder than -10 [deg]C (14 [deg]F) 
the butt weld must be double welded or must be welded using:
    (1) A backing ring that for design pressures greater than 979 kPa 
gauge (142 psig) must be removed after the weld is completed;
    (2) A consumable insert; or
    (3) An inert gas back-up on the first weld pass.
    (b) A slip-on welded joint with sleeves and attachment welds is 
allowed for an open ended pipe with an external diameter of 50 mm (2 
in.) or less and a design temperature of -55 [deg]C (-67 [deg]F), or 
warmer.
    (c) A socket weld fitting with attachment welds is allowed for pipe 
with an external diameter of 50 mm (2 in.) or less and a design 
temperature of -55 [deg]C (-67 [deg]F) or warmer.
    (d) Screwed couplings are allowed for instrumentation and control 
piping that meets Sec.  56.30-20 and Sec.  56.50-105 (a)(4) and (b)(4) 
of this chapter.
    (e) A method or fitting specially approved by the Commandant (CG-
ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.526  Piping joints: Flange connection.

    Flange connections for pipe joints must meet Sec.  56.30-10 and 
Sec.  56.50-105 (a)(4) and (b)(4) of this chapter.



Sec.  154.528  Piping joints: Flange type.

    (a) A flange must be one of the following types:
    (1) Welding neck.
    (2) Slip-on.
    (3) Socket weld.
    (b) If the piping is designed for a temperature between -10 [deg]C 
(14 [deg]F) and -55 [deg]C (-67 [deg]F), the pipe flange may be a:
    (1) Slip-on type, if the nominal pipe size is 100 mm (4 in.) or 
less;
    (2) Socket weld, if the nominal pipe size is 50 mm (2 in.) or less; 
or
    (3) Welding neck.
    (c) If the piping is designed for a temperature lower than -55 
[deg]C (-67 [deg]F), the pipe flange must be a welding neck type.



Sec.  154.530  Valves: Cargo tank MARVS 69 kPa gauge (10 psig) or lower.

    (a) Except those connections for tank safety relief valves and for 
liquid level gauging devices other than those under Sec. Sec.  154.536 
and 154.1310, liquid and vapor connections on a cargo tank with a MARVS 
of 69 kPa gauge (10 psig) or lower must have shut-off valves that--
    (1) Are located as close to the tank as practical;
    (2) Are capable of local manual operation; and
    (3) May be remotely controlled.
    (b) The cargo piping system for a cargo tank with a MARVS of 69 kPa 
gauge (10 psig) or lower must have at least one remotely controlled 
quick-closing shut-off valve for closing liquid and vapor piping between 
vessel and shore that meets Sec. Sec.  154.540 and 154.544.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.532  Valves: Cargo tank MARVS greater than 69 kPa gauge (10 psig).

    (a) Except connections for tank safety relief valves and except for 
liquid level gauging devices other than those under Sec. Sec.  154.536 
and 154.1310, liquid and vapor connections on a cargo tank with a MARVS 
greater than 69 kPa gauge (10 psig) must have, as close to the tank as 
practical, a:
    (1) Stop valve capable of local manual operation; and
    (2) A remotely controlled quick-closing shut-off valve.
    (b) If the nominal pipe size of a liquid or vapor connection is less 
than 50 mm (2 in.), an excess flow valve may be substituted for the 
quick-closing valve under paragraph (a) of this section.
    (c) One valve may be substituted for the manual controlled stop 
valve and the remotely controlled quick-closing

[[Page 320]]

shut-off valve required under paragraph (a) of this section if that 
valve:
    (1) Meets Sec. Sec.  154.540 and 154.544; and
    (2) Is capable of local manual operation.



Sec.  154.534  Cargo pumps and cargo compressors.

    Cargo pumps and cargo compressors must shut-down automatically when 
the quick-closing shut-off valves under Sec. Sec.  154.530 and 154.532 
are closed by the emergency shut-down system required under Sec.  
154.540.



Sec.  154.536  Cargo tank gauging and measuring connections.

    Unless the outward flow from a cargo tank is less than the flow 
through a circular hole of 1.4 mm (0.055 in.) in diameter, cargo tank 
connections for gauging or measuring devices must have the excess flow, 
shut-off, or quick-closing shut-off valves under Sec.  154.530 or Sec.  
154.532.



Sec.  154.538  Cargo transfer connection.

    A cargo transfer connection must have a:
    (a) Remotely controlled quick-closing shut-off valve that meets 
Sec. Sec.  154.540 and 154.544; or
    (b) Blank flange.



Sec.  154.540  Quick-closing shut-off valves: Emergency shut-down system.

    The quick-closing shut-off valves under Sec. Sec.  154.530, 154.532, 
and 154.538 must have an emergency shut-down system that:
    (a) Closes all the valves;
    (b) Is actuated by a single control in at least two locations remote 
from the quick-closing valves;
    (c) Is actuated by a single control in each cargo control station 
under Sec.  154.320; and
    (d) Has fusible elements at each tank dome and cargo loading and 
discharge manifold that melt between 98 [deg]C (208 [deg]F) and 104 
[deg]C (220 [deg]F) and actuate the emergency shut-down system.



Sec.  154.544  Quick-closing shut-off valves.

    The quick-closing shut-off valve under Sec. Sec.  154.530, 154.532 
and 154.538 must:
    (a) Be a shut-off valve;
    (b) Close from the time of actuation in 30 seconds or less;
    (c) Be the fail-closed type; and
    (d) Be capable of local manual closing.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987]



Sec.  154.546  Excess flow valve: Closing flow.

    (a) The rated closing flow of vapor or liquid cargo for an excess 
flow valve must be specially approved by the Commandant (CG-ENG).
    (b) An excess flow valve allowed under Sec.  154.532(b) must close 
automatically at the rated closing flow.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.548  Cargo piping: Flow capacity.

    Piping with an excess flow valve must have a vapor or liquid flow 
capacity that is greater than the rated closing flow under Sec.  
154.546.



Sec.  154.550  Excess flow valve: Bypass.

    If the excess flow valve allowed under Sec.  154.532(b) has a 
bypass, the bypass must be of 1.0 mm (0.0394 in.) or less in diameter.

                               Cargo Hose



Sec.  154.551  Cargo hose: General.

    Each of the vessel's liquid and vapor cargo hose for loading or 
discharging cargo must meet Sec. Sec.  154.552 through 154.562.



Sec.  154.552  Cargo hose: Compatibility.

    Liquid and vapor cargo hoses must:
    (a) Not chemically react with the cargo; and
    (b) Withstand design temperature.



Sec.  154.554  Cargo hose: Bursting pressure.

    Cargo hose that may be exposed to the pressure in the cargo tank, 
the cargo pump discharge, or the vapor compressor discharge must have a 
bursting pressure of at least five times the maximum working pressure on 
the hose during cargo transfer.

[[Page 321]]



Sec.  154.556  Cargo hose: Maximum working pressure.

    A cargo hose must have a maximum working pressure not less than the 
maximum pressure to which it may be subjected and at least 1034 kPa 
gauge (150 psig).



Sec.  154.558  Cargo hose: Marking.

    Each cargo hose must be marked with the:
    (a) Maximum working pressure; and
    (b) Minimum service temperature for service at other than ambient 
temperature.



Sec.  154.560  Cargo hose: Prototype test.

    (a) Each cargo hose must be of a type that passes a prototype test 
at a pressure of at least five times its maximum working pressure at or 
below the minimum service temperature.
    (b) Each cargo hose must not be the hose used in the prototype test.



Sec.  154.562  Cargo hose: Hydrostatic test.

    Each cargo hose must pass a hydrostatic pressure test at ambient 
temperature of at least one and a half times its specified maximum 
working pressure but not more than two-fifths its bursting pressure.

                                Materials



Sec.  154.605  Toughness test.

    (a) Each toughness test under Sec. Sec.  154.610 through 154.625 
must meet Subpart 54.05 of this chapter.
    (b) If subsize test specimens are used for the Charpy V-notch 
toughness test, the Charpy V-notch energy must meet Table 54.05-20 (a) 
of this chapter.



Sec.  154.610  Design temperature not colder than 0 [deg]C (32 [deg]F).

    Materials for cargo tanks for a design temperature not colder than 0 
[deg]C (32 [deg]F) must meet the following:
    (a) The tank materials must meet Sec. Sec.  54.25-1 and 54.25-3 of 
this chapter.
    (b) Plates, forgings, rolled and forged bars and shapes must be 
carbon manganese steel or other material allowed under Sec. Sec.  
154.615, 154.620, and 154.625.
    (c) Plates must be normalized or quenched and tempered and where the 
thickness exceeds 20 mm (0.787 in.), made with fine grain practice, 
austenitic grain size of five or finer. A control rolling procedure may 
be substituted for normalizing if specially approved by the Commandant 
(CG-ENG). Plate for an independent tank type C must also meet the 
requirements of ASTM A 20 (incorporated by reference, see Sec.  154.1) 
and Sec.  54.01-18(b)(5) of this chapter.
    (d) For integral and independent type A tanks, the American Bureau 
of Shipping's grade D not exceeding 20 mm (0.787 in.) in thickness, and 
Grade E hull structural steel are allowed if the steel meets Sec.  
54.05-10 of this chapter.
    (e) The tensile properties under paragraph (a) of this section must 
be determined for:
    (1) Each plate as rolled; and
    (2) Each five short ton batch of forgings, forged or rolled 
fittings, and forged or rolled bars and shapes.
    (f) The specified yield strength must not exceed 637 MPa (92.43 Ksi) 
and when it exceeds 490 MPa (71.10 Ksi), the hardness of the weld and 
the heat affected zone must be specially approved by the Commandant (CG-
ENG).
    (g) The Charpy V-notch impact energy must be determined for:
    (1) Each plate as rolled; and
    (2) Each five short ton batch of forgings, forged or rolled fittings 
and rolled or forged bars and shapes.
    (h) The orientation and required impact energy of a 10 mm x 10 mm 
(0.394 in. x 0.394 in.) Charpy V-notch specimen must be:
    (1) For plates; transverse specimen and 27.4 J (20 ft-lbs); and
    (2) For forgings, forged and rolled fittings and rolled and forged 
bars: longitudinal specimen and 41.1 J (30 ft-lbs).
    (i) The test temperature of the Charpy V-notch specimens is as 
follows:

------------------------------------------------------------------------
               Material Thickness                    Test Temperature
------------------------------------------------------------------------
t<=20 mm (0.788 in.)...........................     0 [deg]C (32 [deg]F)
20
Sec.  154.615  Design temperature below 0 [deg]C (32 [deg]F) and
down to -55 [deg]C (-67 [deg]F).

    Plates, forgings, forged or rolled or forged bars and shapes for 
cargo tanks and secondary barriers for a design temperature below 0 
[deg]C (32 [deg]F) and down to -55 [deg]C (-67 [deg]F) must meet Sec.  
54.25-10 of this chapter.



Sec.  154.620  Design temperature below -55 [deg]C (-67 [deg]F)
and down to -165 [deg]C (-265 [deg]F).

    Plates, forgings and forged or rolled fittings, and rolled, forged 
or extruded bars and shapes for cargo tanks, secondary barriers, and 
process pressure vessels for a design temperature below -55 [deg]C (-67 
[deg]F) and down to -165 [deg]C (-265 [deg]F) must:
    (a) Meet Sec.  54.25-10(b)(2), Sec.  54.25-15, or Sec.  54.25-20 of 
this chapter; or
    (b) Be of an aluminum alloy that is specially approved by the 
Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.625  Design temperature below 0 [deg]C (32 [deg]F) and 
down to -165 [deg]C (-265 [deg]F).

    Pipes, tubes, forgings, castings, bolting, and nuts for cargo and 
process piping for a design temperature below 0 [deg]C (32 [deg]F) and 
down to -165 [deg]C (-265 [deg]F) must meet Sec.  56.50-105 of this 
chapter.



Sec.  154.630  Cargo tank material.

    (a) If a material of a cargo tank is not listed in Sec. Sec.  
154.610, 154.615 or Sec.  154.620, the allowable stress of that material 
must be specially approved by the Commandant (CG-ENG).
    (b) For cargo tanks of aluminum alloys with welded connections, the 
minimum tensile strength ([sigma]B) for the calculations 
under Sec.  154.440, Sec.  154.447 and Sec.  154.450 must be the minimum 
tensile strength of the alloy in the annealed condition.
    (c) Increased yield strength and tensile strength of a material at 
low temperature for independent tanks type A, B, and C must be specially 
approved by the Commandant (CG-ENG).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                              Construction



Sec.  154.650  Cargo tank and process pressure vessel welding.

    (a) Cargo tank and process pressure vessel welding must meet Subpart 
54.05 and Part 57 of this chapter.
    (b) Welding consumables used in welding cargo tanks must meet Sec.  
57.02-4 of this chapter.
    (c) Independent tanks must meet the following:
    (1) Each welded joint of the shells must be a full penetration butt 
weld, except dome to shell connections may have full penetration tee 
welds.
    (2) Each nozzle weld must be of the full penetration type, except 
for small penetrations on domes.
    (d) Each welded joint in an independent tank type C or in a process 
pressure vessel must meet part 54 of this chapter, except that any 
backing rings must be removed unless specially approved by the 
Commandant (CG-OES).
    (e) Each welded joint in a membrane tank must meet the quality 
assurance measures, weld procedure qualification, design details, 
materials, construction, inspection, and production testing of 
components developed during the prototype testing program that are 
specially approved by the Commandant (CG-OES) under this part.
    (f) Each welded joint in a semi-membrane tank must meet paragraph 
(c) or (e) of this section.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.655  Stress relief for independent tanks type C.

    For a design temperature colder than -10 [deg]C (14 [deg]F), an 
independent tank type C of:
    (a) Carbon and carbon-manganese steel must be stress relieved by 
post-weld heat treatment under Sec.  54.25-7 of this chapter or by 
mechanical stress relief under subpart 54.30 of this chapter; or
    (b) Materials other than carbon and carbon manganese steel must be 
stress relieved as required under part 54 of this chapter. The procedure 
for stress relieving must be specially approved by the Commandant (CG-
OES).

[[Page 323]]



Sec.  154.660  Pipe welding.

    (a) Pipe welding must meet part 57 of this chapter.
    (b) Longitudinal butt welds, in piping that does not meet a standard 
or specification under Sec.  56.60-1 of this chapter, and girth butt 
welds must meet the following:
    (1) Butt welds of pipes made from carbon, carbon manganese, or low 
alloy steels must meet Sec.  56.50-105 of this chapter, including the 
requirements for post-weld heat treatment.
    (2) Except for piping inside an independent cargo tank type A, B, or 
C, butt welds must be 100% radiographically tested if the design 
temperature is lower than -10 [deg]C (14 [deg]F), and:
    (i) The wall thickness is greater than 10 mm (0.394 in.); or
    (ii) The nominal pipe diameter is greater than 100 mm (nominal 4 
in.).
    (3) If Table 4 references this section, butt welds for deck cargo 
piping exceeding 75 mm (3 in.) in diameter must be 100% radiographically 
tested.
    (4) Butt welds of pipes not meeting paragraph (b)(2) or (b)(3) of 
this section must meet the non-destructive testing requirements under 
Subpart 56.95 of this chapter.



Sec.  154.665  Welding procedures.

    Welding procedure tests for cargo tanks for a design temperature 
colder than 0 [deg]C (32 [deg]F), process pressure vessels, and piping 
must meet Sec.  54.05-15 and Subpart 57.03 of this chapter.

                 Cargo Pressure and Temperature Control



Sec.  154.701  Cargo pressure and temperature control: General.

    Except as allowed under Sec.  154.703, cargo tanks must:
    (a) Have their safety relief valves set at a pressure equal to or 
greater than the vapor pressure of the cargo at 45 [deg]C (113 [deg]F) 
but not greater than the MARVS under Sec.  154.405; or
    (b) Be refrigerated by a system meeting Sec.  154.702, and each 
refrigerated incompatible cargo refrigerated by a separate system.



Sec.  154.702  Refrigerated carriage.

    (a) Each refrigeration system must:
    (1) Have enough capacity to maintain the cargo vapor pressure in 
each cargo tank served by the system below the set pressure of the 
relief valves under ambient temperatures of 45 [deg]C (113 [deg]F) still 
air and 32 [deg]C (89.6 [deg]F) still water with the largest unit in the 
system inoperative; or
    (2) Have a standby unit with a capacity at least equal to the 
capacity of the largest refrigeration unit in the system.
    (b) For the purpose of this section, a ``refrigeration unit'' 
includes a compressor and its motors and controls.
    (c) Each refrigeration system must:
    (1) Have a heat exchanger with an excess capacity of 25 percent of 
the required capacity; or
    (2) A standby heat exchanger.
    (d) Where cooling water is used in a refrigeration system:
    (1) The cooling water pump or pumps must be used exclusively for the 
system;
    (2) Each pump must have suction lines from sea chests on the port 
and starboard sides of the vessel; and
    (3) There must be a standby pump, that may be used for:
    (i) Non-essential purposes on the vessel; or
    (ii) Essential purposes on the vessel, if the pump is sized to 
simultaneously provide for the capacity requirements for the essential 
purposes and the refrigeration cooling water.
    (e) Each refrigeration system must use refrigerants that are 
compatible with the cargo and, for cascade units, with each other.
    (f) The pressure of the heat transfer fluid in each cooling coil in 
a tank must be greater than the pressure of the cargo.



Sec.  154.703  Methane (LNG).

    Unless a cargo tank carrying methane (LNG) can withstand the 
pressure build up due to boil-off for 21 days, the pressure in the cargo 
tank must be maintained below the set pressure of the safety relief 
valve for at least 21 days by:
    (a) A refrigeration system that meets Sec.  154.702;
    (b) A waste heat or catalytic furnace that burns boil-off gas, and:

[[Page 324]]

    (1) Maintains the stack exhaust temperature below 535 [deg]C (995 
[deg]F);
    (2) Exhibits no visible flame; and
    (3) Is specially approved by the Commandant (CG-OES);
    (c) Boilers, inert gas generators, and combustion engines in the 
main propelling machinery space that use boil-off gas as fuel; or
    (d) Equipment for services, other than those under paragraph (c) of 
this section, that use boil-off gas as fuel and that are located:
    (1) In the main propelling machinery space; or
    (2) a space specially approved by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.705  Cargo boil-off as fuel: General.

    (a) Each cargo boil-off fuel system under Sec.  154.703(c) must meet 
Sec. Sec.  154.706 through 154.709.
    (b) The piping in the cargo boil-off fuel system must have a 
connection for introducing inert gas and for gas freeing the piping in 
the machinery space.
    (c) A gas fired main propulsion boiler or combustion engine must 
have a fuel oil fired pilot that maintains fuel flow as required under 
Sec.  154.1854 if the gas fuel supply is cut-off.



Sec.  154.706  Cargo boil-off as fuel: Fuel lines.

    (a) Gas fuel lines must not pass through accommodation, service, or 
control spaces. Each gas fuel line passing through other spaces must 
have a master gas fuel valve and meet one of the following:
    (1) The fuel line must be a double-walled piping system with the 
annular space containing an inert gas at a pressure greater than the 
fuel pressure. Visual and audible alarms must be installed at the 
machinery control station to indicate loss of inert gas pressure.
    (2) The fuel line must be installed in a mechanically exhaust-
ventilated pipe or duct, having a rate of air change of at least 30 
changes per hour. The pressure in the space between the inner pipe and 
outer pipe or duct must be maintained at less than atmospheric pressure. 
Continuous gas detection must be installed to detect leaks in the 
ventilated space. The ventilation system must meet Sec.  154.1205.
    (b) Each double wall pipe or vent duct must terminate in the 
ventilation hood or casing under Sec.  154.707(a). Continuous gas 
detection must be installed to indicate leaks in the hood or casing.



Sec.  154.707  Cargo boil-off as fuel: Ventilation.

    (a) A ventilation hood or casing must be installed in areas occupied 
by flanges, valves, and piping at the fuel burner to cause air to sweep 
across them and be exhausted at the top of the hood or casing.
    (b) The hood or casing must be mechanically exhaust-ventilated and 
meet Sec.  154.1205.
    (c) The ventilated hood or casing must have an airflow rate 
specially approved by the Commandant.



Sec.  154.708  Cargo boil-off as fuel: Valves.

    (a) Gas fuel lines to the gas consuming equipment must have two 
fail-closed automatic valves in series. A third valve, designed to fail-
open, must vent that portion of pipe between the two series valves to 
the open atmosphere.
    (b) The valves under paragraph (a) of this section must be arranged 
so that loss of boiler forced draft, flame failure, or abnormal gas fuel 
supply pressure automatically causes the two series valves to close and 
the vent valve to open. The function of one of the series valves and the 
vent valve may be performed by a single three-way valve.
    (c) A master gas fuel valve must be located outside the machinery 
space, but be operable from inside the machinery space and at the valve. 
The valve must automatically close when there is:
    (1) A gas leak detected under Sec.  154.706(a)(2) or Sec.  
154.706(b);
    (2) Loss of the ventilation under Sec.  154.706(a)(2) or Sec.  
154.707(c); or
    (3) Loss of inert gas pressure within the double-walled piping 
system under Sec.  154.706(a)(1).

[[Page 325]]



Sec.  154.709  Cargo boil-off as fuel: Gas detection equipment.

    (a) The continuous gas detection system required under Sec.  
154.706(a)(2) and (b) must:
    (1) Meet Sec.  154.1350(c), (d), and (j) through (s); and
    (2) Have a device that:
    (i) Activates an audible and visual alarm at the machinery control 
station and in the wheelhouse if the methane concentration reaches 1.5 
percent by volume; and
    (ii) Closes the master gas fuel valve required under Sec.  
154.708(c) before the methane concentration reaches 3 percent by volume.
    (b) The number and arrangement of gas sampling points must be 
specially approved by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                           Cargo Vent Systems



Sec.  154.801  Pressure relief systems.

    (a) Each cargo tank that has a volume of 20m\3\ (706 ft.\3\) or less 
must have at least one pressure relief valve.
    (b) Each cargo tank that has a volume of more than 20m\3\ (706 
ft.\3\) must have at least two pressure relief valves of the same 
nominal relieving capacity.
    (c) Each pressure relief valve must:
    (1) Meet Subpart 162.018 of this chapter or, if the valve is also 
capable of vacuum relief and the MARVS is 69 kPa gauge (10 psig) or 
less, Subpart 162.017 of this chapter, and have at least the capacity 
required under Sec.  154.806;
    (2) Not be set for a higher pressure than the MARVS;
    (3) Have a fitting for sealing wire that prevents the set pressure 
from being changed without breaking the sealing wire;
    (4) Be fitted on the cargo tank to remain in the vapor phase under 
conditions of 15[deg] list and of 0.015 L trim by both the bow and 
stern;
    (5) Vent to a vent mast under Sec.  154.805, except a relief valve 
may vent to a common tank relief valve header if the back pressure is 
included in determining the required capacity under Sec.  154.806;
    (6) Not vent to a common header or common vent mast if the relief 
valves are connected to cargo tanks carrying chemically incompatible 
cargoes;
    (7) Not have any stop valves or other means of isolating the cargo 
tank from its relief valve unless:
    (i) The stop valves are interlocked or arranged so that only one 
pressure relief valve is out of service at any one time;
    (ii) The interlock arrangement automatically shows the relief valve 
that is out of service; and
    (iii) The other valves have the relieving capacity required under 
Sec.  154.806, or all relief valves on the cargo tank are the same size 
and there is a spare of the same size, or there is a spare for each 
relief valve on a cargo tank.
    (d) The pressure relief system must:
    (1) If the design temperature is below 0 [deg]C (32 [deg]F), be 
designed to prevent the relief valve from becoming inoperative due to 
ice formation; and
    (2) Be designed to prevent chattering of the relief valve.

[CGD 74-289, 44 FR 26009, May 3, 1979; 44 FR 59234, Oct. 15, 1979]



Sec.  154.802  Alternate pressure relief settings.

    Cargo tanks with more than one relief valve setting must have one of 
the following arrangements:
    (a) Relief valves that:
    (1) Are set and sealed under Sec.  154.801(c);
    (2) Have the capacity under Sec.  154.806; and
    (3) Are interlocked so that cargo tank venting can occur at any 
time.
    (b) Relief valves that have spacer pieces or springs that:
    (1) Change the set pressure without pressure testing to verify the 
new setting; and
    (2) Can be installed without breaking the sealing wire required 
under Sec.  154.801(c)(3).



Sec.  154.804  Vacuum protection.

    (a) Except as allowed under paragraph (b) of this section, each 
cargo tank must have a vacuum protection system meeting paragraph (a)(1) 
of this

[[Page 326]]

section and either paragraph (a)(2) or (a)(3) of this section.
    (1) There must be a means of testing the operation of the system.
    (2) There must be a pressure switch that operates an audible and 
visual alarm in the cargo control station identifying the tank and the 
alarm condition and a remote group audible and visual alarm in the 
wheelhouse. Both alarms must be set at or below 80% of the maximum 
external design pressure differential of the cargo tanks. There must be 
a second, independent pressure switch that automatically shuts off all 
suction of cargo liquid or vapor from the cargo tank and secures any 
refrigeration of that tank at or below the maximum external design 
pressure differential.
    (3) There must be a vacuum relief valve that:
    (i) Has a gas flow capacity at least equal to the maximum cargo 
discharge rate per tank;
    (ii) Is set to open at or below the maximum external design pressure 
differential; and
    (iii) Admits inert gas, cargo vapor from a source other than a cargo 
vapor header, or air except as prohibited under Sec.  154.1710.
    (b) A vacuum protection system does not have to be installed if the 
cargo tank is designed to withstand:
    (1) A maximum external pressure differential exceeding 24.5 kPa 
gauge (3.55 psig); and
    (2) The maximum external pressure differential that can be obtained:
    (i) At maximum discharge rates with no vapor return to the cargo 
tanks;
    (ii) By operation of the cargo refrigeration system; or
    (iii) By drawing off vapor for use in accordance with Sec.  
154.703(c)

[CGD 74-289, 44 FR 26009, May 3, 1979; 44 FR 59234, Oct. 15, 1979]



Sec.  154.805  Vent masts.

    Relief valves or common vent headers from relief valves must 
discharge to a vent mast that:
    (a) Discharges vertically upward;
    (b) Has a rain cap or other means of preventing the entrance of rain 
or snow;
    (c) Has a screen with 25mm (1 inch) wire mesh or bars not more than 
25mm (1 in.) apart on the discharge port;
    (d) Extends at least to a height of B/3 or 6m (19.7 ft.), whichever 
is greater, above the weather deck and 6m (19.7 ft.) above the working 
level;
    (e) For a cargo tank, does not exhaust cargo vapors within a radius 
of B or 25m (82 ft.), whichever is less, from any forced or natural 
ventilation intake or other opening to an accommodation, service, 
control station, or other gas-safe space, except that for vessels less 
than 90m (295 ft.) in length, shorter distances may be specially 
approved by the Commandant (CG-OES);
    (f) For a containment system, except a cargo tank, does not exhaust 
vapor within a radius of 10m (32.8 ft.) or less from any forced or 
natural ventilation intake or other opening to an accommodation, 
service, control station, or other gas-safe space;
    (g) Has drains to remove any liquid that may accumulate; and
    (h) Prevents accumulations of liquid at the relief valves.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.806  Capacity of pressure relief valves.

    Pressure relief valves for each cargo tank must have a combined 
relief capacity, including the effects of back pressure from vent 
piping, headers, and masts, to discharge the greater of the following 
with not more than a 20% rise in cargo tank pressure above the set 
pressure of the relief valves:
    (a) The maximum capacity of an installed cargo tank inerting system 
if the maximum attainable working pressure of the cargo tank inerting 
system exceeds the set pressure of the relief valves.
    (b) The quantity of vapors generated from fire exposure that is 
calculated under Sec.  54.15-25 of this chapter.

[[Page 327]]

            Atmospheric Control in Cargo Containment Systems



Sec.  154.901  Atmospheric control within cargo tanks and cargo
piping systems.

    (a) Each vessel must have a piping system for purging each cargo 
tank and all cargo piping.
    (b) The piping system must minimize the pocketing of gas or air 
remaining after purging.
    (c) For cargo tanks certificated to carry flammable gases, the 
piping system must allow purging the tank of flammable vapors before air 
is introduced and purging the tank of air before the tank is filled with 
cargo.
    (d) Each cargo tank must have:
    (1) Gas sampling points at its top and bottom; and
    (2) Gas sampling line connections that are valved and capped above 
the deck.



Sec.  154.902  Atmospheric control within hold and interbarrier spaces.

    (a) Vessels certificated to carry flammable cargo in cargo 
containment systems with full secondary barriers must have an inert gas 
system or onboard storage of inert gas that provides enough inert gas to 
meet the requirements of Sec.  154.1848 for 30 days consumption.
    (b) Vessels certificated to carry flammable cargo in cargo 
containment systems with partial secondary barriers must:
    (1) Have an inert gas system or onboard inert gas storage that can 
inert the largest hold and interbarrier space so that the oxygen 
concentration is 8 percent or less by volume; and
    (2) Meet paragraph (a) or (c)(2) of this section.
    (c) Vessels certificated to carry only nonflammable cargo in cargo 
containment systems with secondary barriers must:
    (1) Meet paragraph (a) of this section; or
    (2) Have air drying systems that reduce the dew point of air 
admitted to hold or interbarrier spaces below the temperature of any 
surface in those spaces or -45 [deg]C (-49 [deg]F), whichever is warmer.
    (d) Vessels with refrigerated independent tanks type C must have 
inert gas or air drying systems that reduce the dew point of any inert 
gas or air admitted to the hold spaces below the temperature of any 
surface in those spaces or -45 [deg]C (-49 [deg]F), whichever is warmer.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 
FR 58285, Sept. 29, 2014]



Sec.  154.903  Inert gas systems: General.

    (a) Inert gas carried or generated to meet Sec. Sec.  154.901, 
154.902, and 154.1848 must be non-flammable and non-reactive with the 
cargoes that the vessel is certificated to carry and the materials of 
construction of the cargo tanks, hold and interbarrier spaces, and 
insulation.
    (b) The boiling point and dew point at atmospheric pressure of the 
inert gas must be below the temperature of any surface in those spaces 
or -45 [deg]C (-49 [deg]F), whichever is warmer.
    (c) For the temperatures and pressures at which the gas is stored 
and used, storage vessels and inert gas piping must meet Sec. Sec.  
154.450 and 154.500 respectively.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 
FR 58285, Sept. 29, 2014]



Sec.  154.904  Inert gas system: Controls.

    The inert gas system must have:
    (a) At least one check valve in the cargo area to prevent the back 
flow of cargo vapor into the inert gas system, or another means 
specially approved by the Commandant (CG-OES);
    (b) If the inert gas system is in the machinery space or another 
space outside the cargo area, a second check valve in the cargo area 
meeting paragraph (a) of this section;
    (c) Automatic and manual inert gas pressure controls; and
    (d) Valves to isolate each inerted space.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.906  Inert gas generators.

    The inert gas generator must:

[[Page 328]]

    (a) Produce an inert gas containing less than 5% oxygen by volume;
    (b) Have a device to continuously sample the discharge of the 
generator for oxygen content; and
    (c) Have an audible and visual alarm in the cargo control station 
that alarms when the inert gas contains 5% or more oxygen by volume.



Sec.  154.908  Inert gas generator: Location.

    (a) Except as allowed in paragraph (b) of this section, an inert gas 
generator must be located in the main machinery space or a space that is 
not in the cargo area and does not have direct access to any 
accommodation, service, or control space.
    (b) An inert gas generator that does not use flame burning equipment 
may be located in the cargo area if specially approved by the Commandant 
(CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.910  Inert gas piping: Location.

    Inert gas piping must not pass through or terminate in an 
accommodation, service, or control space.



Sec.  154.912  Inerted spaces: Relief devices.

    Inerted spaces must be fitted with relief valves, rupture discs, or 
other devices specially approved by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979; CGD 82-063b, 48 FR 39629, Sept. 
1, 1983]

                               Electrical



Sec.  154.1000  Applicability.

    Sections 154.1005 through 154.1020 apply to flammable cargo and 
ammonia carriers.



Sec.  154.1002  Definition.

    For the purposes of Sec. Sec.  154.1005 through 154.1020, ``gas-
dangerous'' does not include the weather deck of an ammonia carrier.



Sec.  154.1005  Equipment approval.

    (a) Electrical equipment that is required to be intrinsically safe 
or explosion proof under Sec.  154.1010 must be specially approved by 
the Commandant or listed as intrinsically safe or explosion proof by an 
independent laboratory that is specially approved by the Commandant (CG-
OES), for Class I Division I locations and the Group that is specified 
in Table 4 for the cargo carried.
    (b) Each submerged cargo pump motor installation must be specially 
approved by the Commandant (CG-OES).
    (c) Electrical equipment that must be intrinsically safe to meet 
Sec.  154.1010 must meet the definition in Sec.  110.15-100(i) of this 
chapter.
    (d) Electrical equipment that must be explosion proof to meet Sec.  
154.1010 must meet Sec.  110.15-65(e) of this chapter.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1010  Electrical equipment in gas-dangerous space or zone.

    (a) Except as allowed in this section, electrical equipment must not 
be installed in a gas-dangerous space or zone.
    (b) Intrinsically safe electrical equipment and wiring may be in a 
gas-dangerous space or zone.
    (c) A submerged cargo pump motor may be in a cargo tank if:
    (1) Low liquid level, motor current, or pump discharge pressure 
automatically shuts down power to the pump motor if the pump loses 
suction;
    (2) There is an audible and visual alarm at the cargo control 
station that actuates if the motor shuts down under the requirements of 
paragraph (c)(1) of this section; and
    (3) There is a lockable circuit breaker or lockable switch that 
disconnects the power to the motor.
    (d) A supply cable for a submerged cargo pump motor may be in a hold 
space.
    (e) A hold space that has a tank that is not required to have a 
secondary barrier under Sec.  154.459 may only have:
    (1) Through runs of cable;
    (2) Explosion-proof lighting fixtures;
    (3) Depth sounding devices in gas-tight enclosures;
    (4) Log devices in gas-tight enclosures; and

[[Page 329]]

    (5) Impressed current cathodic protection system electrodes in gas-
tight enclosures.
    (f) A space that is separated by a gastight steel boundary from a 
hold space that has a cargo tank that must have a secondary barrier, 
under the requirements of Sec.  154.459, may only have:
    (1) Through runs of cable;
    (2) Explosion-proof lighting fixtures;
    (3) Depth sounding devices in gastight enclosures;
    (4) Log devices in gastight enclosures;
    (5) Impressed current cathodic protection system electrodes in 
gastight enclosures;
    (6) Explosion-proof motors that operate cargo system valves or 
ballast system valves; and
    (7) Explosion-proof bells for general alarm systems.
    (g) A cargo handling room may only have:
    (1) Explosion-proof lighting fixtures; and
    (2) Explosion-proof bells for general alarm systems.
    (h) A space for cargo hose storage may only have:
    (1) Explosion-proof lighting fixtures; and
    (2) Through runs of cable.
    (i) A space that has cargo piping may only have:
    (1) Explosion-proof lighting fixtures; and
    (2) Through runs of cable.
    (j) A gas-dangerous zone on the weather deck may only have:
    (1) Explosion-proof equipment that is for the operation of the 
vessel; and
    (2) Through runs of cable.
    (k) A space, except those under paragraphs (e) through (j) of this 
section, that has a direct opening to a gas-dangerous space or zone may 
only have the electrical equipment allowed in the gas-dangerous space or 
zone.



Sec.  154.1015  Lighting in gas-dangerous space.

    (a) Each gas-dangerous space that has lighting fixtures must have at 
least two branch circuits for lighting.
    (b) Each switch and each overcurrent protective device for any 
lighting circuit that is in a gas-dangerous space must open each 
conductor of the circuit simultaneously.
    (c) Each switch and each overcurrent protective device for lighting 
in a gas-dangerous space must be in a gas-safe space.



Sec.  154.1020  Emergency power.

    The emergency generator must be designed to allow operation at the 
final angle of heel under Sec.  154.230(a).

                              Firefighting

                Firefighting System: Exterior Water Spray



Sec.  154.1105  Exterior water spray system: General.

    Each liquefied flammable gas vessel and each liquefied toxic gas 
vessel must have an exterior water spray system that meets Sec. Sec.  
154.1110 through 154.1135.



Sec.  154.1110  Areas protected by system.

    Each water spray system must protect:
    (a) All cargo tank surfaces that are not covered by the vessel's 
hull structure or a steel cover;
    (b) Each cargo tank dome;
    (c) Each on-deck storage vessel for flammable or toxic liquefied 
gases;
    (d) Each cargo discharge and loading manifold;
    (e) Each quick-closing valve under Sec. Sec.  154.530, 154.532, and 
154.538, and other control valves essential to cargo flow;
    (f) Each boundary facing the cargo area of each superstructure that 
contains accommodation, service, or control spaces;
    (g) Each boundary facing the cargo area of each deckhouse that 
contains accommodation, service, or control spaces; and
    (h) Each boundary of each deckhouse that is within the cargo area 
and that is manned during navigation of the vessel or during cargo 
transfer operations, except the deckhouse roof if it is 2.4 m (8 ft.) or 
higher above the cargo containing structure.

[CGD 74-289, 44 FR 26009, May 3, 1979; 44 FR 59234, Oct. 15, 1979]



Sec.  154.1115  Discharge.

    (a) The discharge density of each water spray system must be at 
least:

[[Page 330]]

    (1) 10000 cm\3\/m\2\/min. (0.25 gpm/ft.\2\) over each horizontal 
surface; and
    (2) 4000 cm\3\/m\2\/min. (0.10 gpm/ft.\2\) against vertical surface, 
including the water rundown.
    (b) The water spray protection under Sec.  154.1110 (d) and (e) must 
cover an area in a horizontal plane extending at least 0.5 m (19 in.) in 
each direction from the pipes, fittings, and valves, or the area of the 
drip tray, whichever is greater.



Sec.  154.1120  Nozzles.

    (a) Nozzles for the water spray system must be spaced to provide the 
minimum discharge density under Sec.  154.1115 in each part of the 
protected area.
    (b) The vertical distance between water spray nozzles for the 
protection of vertical surfaces must be 3.7 m (12 ft.) or less.



Sec.  154.1125  Pipes, fittings, and valves.

    (a) Each pipe, fitting, and valve for each water spray system must 
meet Part 56 of this chapter.
    (b) Each water spray main that protects more than one area listed in 
Sec.  154.1110 must have at least one isolation valve at each branch 
connection and at least one isolation valve downstream of each branch 
connection to isolate damaged sections.
    (c) Each valved cross-connection from the water spray system to the 
fire main must be outside of the cargo area.
    (d) Each pipe, fitting, and valve for the water spray system must be 
made of fire resistant and corrosion resistant materials, such as 
galvanized steel or galvanized iron pipe.
    (e) Each water spray system must have a means of drainage to prevent 
corrosion of the system and freezing of accumulated water in subfreezing 
temperatures.
    (f) Each water spray system must have a dirt strainer that is 
located at the water spray system manifold or pump.



Sec.  154.1130  Sections.

    (a) If a water spray system is divided into sections, each section 
must at least include the entire deck area bounded by the length of a 
cargo tank and the full beam of the vessel.
    (b) If a water spray system is divided into sections, the control 
valves must be at a single manifold that is aft of the cargo area.



Sec.  154.1135  Pumps.

    (a) Water to the water spray system must be supplied by:
    (1) A pump that is only for the use of the system;
    (2) A fire pump; or
    (3) A pump specially approved by the Commandant (CG-OES).
    (b) Operation of a water spray system must not interfere with 
simultaneous operation of the fire main system at its required capacity. 
There must be a valved cross-connection between the two systems.
    (c) Except as allowed under paragraph (d) of this section, each pump 
for each water spray system must have the capacity to simultaneously 
supply all areas named in Sec.  154.1110.
    (d) If the water spray system is divided into sections, the pump 
under paragraph (a) of this section must have the capacity to 
simultaneously supply the required discharge density under Sec.  
154.1115(a) for:
    (1) The areas in Sec. Sec.  154.1110(f) through (h) and 154.1115(b); 
and
    (2) The largest section that includes the required protection under 
Sec.  154.1110 (a), (b), and (c).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]

                    Firefighting System: Dry Chemical



Sec.  154.1140  Dry chemical system: General.

    Each liquefied flammable gas carrier must have a dry chemical 
firefighting system that meets Sec. Sec.  154.1145 through 154.1170, 
Part 56 and Subpart 162.039 of this chapter.



Sec.  154.1145  Dry chemical supply.

    (a) A vessel with a cargo carrying capacity less that 1000 m\3\ 
(35,300 ft.\3\) must have at least one self-contained dry chemical 
storage unit for the cargo area with an independent inert gas 
pressurizing source adjacent to each unit.
    (b) A vessel with a cargo carrying capacity of 1000 m\3\ (35,300 
ft.\3\) or more must have at least two self-contained dry chemical 
storage units for the

[[Page 331]]

cargo area with an independent inert gas pressurizing source adjacent to 
each unit.
    (c) A vessel with bow and stern loading and discharge areas must 
have at least one self-contained dry chemical storage unit with an 
independent inert gas pressurizing source adjacent to the unit for each 
area.
    (d) Each dry chemical storage unit and associated piping must be 
designed for:
    (1) Sequential discharge of each hose line and each monitor for 45 
seconds; and
    (2) Simultaneous discharge of all hose lines and monitors for 45 
seconds.
    (e) Each fully charged dry chemical storage unit must have the 
greater of the following:
    (1) Enough dry chemical to provide for sequential discharge of each 
attached hose and monitor for 45 seconds.
    (2) Enough dry chemical to provide for simultaneous discharge of all 
attached hoses and monitors for 45 seconds.



Sec.  154.1150  Distribution of dry chemical.

    (a) All locations on the above deck cargo area and the cargo piping 
outside that cargo area must be protected by:
    (1) At least two dry chemical hand hose lines; or
    (2) At least one dry chemical hand hose line and one dry chemical 
monitor.
    (b) At least one dry chemical storage unit and hand hose line or 
monitor must be at the after end of the cargo areas.
    (c) Each cargo loading and discharge manifold must be protected by 
at least one dry chemical monitor.



Sec.  154.1155  Hand hose line: Coverage.

    The coverage for the area for a hand hose line under Sec.  154.1150 
must not exceed the length of the hand hose line except the coverage for 
the protection of areas that are inaccessible to personnel must not 
exceed one-half the projection of the hose at its rated discharge, or 10 
m (32.8 ft.), whichever is less.



Sec.  154.1160  Monitor coverage of system.

    The coverage of each dry chemical system monitor under Sec.  
154.1150 must not exceed:
    (a) 10 m (32.8 ft.) at 10 kg/sec (22 lb/sec);
    (b) 30 m (98.4 ft.) at 25 kg/sec (55 lb/sec);
    (c) 40 m (131.2 ft.) at 45 kg/sec (99 lb/sec);
    (d) An interpolation between 10 m (32.8 ft.) at 10 kg/sec (22 lb/
sec) and 30 m (98.4 ft.) at 25 kg/sec (55 lb/sec); or
    (e) An interpolation between 30 m (98.4 ft.) at 25 kg/sec (55 lb/
sec) and 40 m (131.2 ft.) at 45 kg/sec (99 lb/sec).



Sec.  154.1165  Controls.

    (a) Each dry chemical hand hose line must be one that can be 
actuated at its hose reel or hose storage cabinet.
    (b) Each dry chemical monitor must be one that can be actuated and 
controlled at the monitor.
    (c) A dry chemical monitor for the cargo loading and discharging 
manifold areas must be one that can be:
    (1) Actuated from a location other than the monitor and manifold 
area; and
    (2) Except for pre-aimed monitors, controlled from a location other 
than the monitor and manifold area.
    (d) Each dry chemical storage unit must have independent piping with 
a stop valve in the piping for each remote hand hose line and remote 
monitor where the piping connects to the storage container, if the unit 
has:
    (1) More than one hand hose line;
    (2) More than one monitor; or
    (3) A combination of hand hose lines and monitors.
    (e) Each stop valve under paragraph (d) of the section must be 
capable of:
    (1) Manual operation; and
    (2) Being opened from the hose reel or monitor to which it is 
connected.
    (f) Damage to any dry chemical system hose, monitor, pipe or control 
circuits must not prevent the operation of other hoses, monitors, or 
control circuit that are connected to the same storage unit.



Sec.  154.1170  Hand hose line: General.

    Each dry chemical hand hose line must:
    (a) Not be longer than 33m (108 ft.);

[[Page 332]]

    (b) Be stored on a hose reel or in a hose cabinet and be one that is 
operable whether or not it is unwound from a hose reel or removed from a 
hose cabinet;
    (c) Be non-kinkable;
    (d) Have a nozzle with a valve to start and stop the flow of 
chemical;
    (e) Have a capacity of at least 3.5 kg/sec (7.7 lb./sec); and
    (f) Be one that can be operated by one person.

                Cargo Area: Mechanical Ventilation System



Sec.  154.1200  Mechanical ventilation system: General.

    (a) Each cargo compressor room, pump room, gas-dangerous cargo 
control station, and space that contains cargo handling equipment must 
have a fixed, exhaust-type mechanical ventilation system.
    (b) The following must have a supply-type mechanical ventilation 
system:
    (1) Each space that contains electric motors for cargo handling 
equipment.
    (2) Each gas-safe cargo control station in the cargo area.
    (3) Each gas-safe space in the cargo area.
    (4) Each space that contains inert gas generators, except main 
machinery spaces.



Sec.  154.1205  Mechanical ventilation system: Standards.

    (a) Each exhaust type mechanical ventilation system required under 
Sec.  154.1200 (a) must have ducts for vapors from the following:
    (1) The deck level.
    (2) Bilges.
    (3) If the vapors are lighter than air, the top of each space that 
personnel enter during cargo handling operations.
    (b) The discharge end of each duct under paragraph (a) of this 
section must be at least 10 m (32.8 ft.) from ventilation intakes and 
openings to accommodations, service, control station, and other gas-safe 
spaces.
    (c) Each ventilation system under Sec.  154.1200 (a) and (b)(1) must 
change the air in that space and its adjoining trunks at least 30 times 
each hour.
    (d) Each ventilation system for a gas-safe cargo control station in 
the cargo area must change the air in that space at least eight times 
each hour.
    (e) A ventilation system must not recycle vapor from ventilation 
discharges.
    (f) Each mechanical ventilation system must have its operational 
controls outside the ventilated space.
    (g) No ventilation duct for a gas-dangerous space may pass through 
any machinery, accommodation, service, or control space, except as 
allowed under Sec.  154.703.
    (h) Each electric motor that drives a ventilation fan must not be 
within the ducts for any space that may contain flammable cargo vapors.
    (i) Ventilation impellers and the housing in way of those impellers 
on a flammable cargo carrier must meet one of the following:
    (1) The impeller, housing, or both made of non-metallic material 
that does not generate static electricity.
    (2) The impeller and housing made of non-ferrous material.
    (3) The impeller and housing made of austenitic stainless steel.
    (4) The impeller and housing made of ferrous material with at least 
13mm (0.512 in.) tip clearance.
    (j) No ventilation fan may have any combination of fixed or rotating 
components made of an aluminum or magnesium alloy and ferrous fixed or 
rotating components.
    (k) Each ventilation intake and exhaust must have a protective metal 
screen of not more than 13mm (0.512 in.) square mesh.



Sec.  154.1210  Hold space, void space, cofferdam, and spaces
containing cargo piping.

    (a) Each hold space, void space, cofferdam, and spaces containing 
cargo piping must have:
    (1) A fixed mechanical ventilation system; or
    (2) A fixed ducting system that has a portable blower that meets 
Sec.  154.1205(i) and (j).
    (b) A portable blower in any personnel access opening must not 
reduce the area of that opening so that the opening does not meet Sec.  
154.340.

[[Page 333]]

                             Instrumentation



Sec.  154.1300  Liquid level gauging system: General.

    (a) If Table 4 lists a closed gauge for a cargo, the liquid level 
gauging system under Sec.  154.1305 must be closed gauges that do not 
have any opening through which cargo liquid or vapor could escape, such 
as an ultrasonic device, float type device, electronic or magnetic 
probe, or bubble tube indicator.
    (b) If Table 4 lists a restricted gauge for a cargo, the liquid 
level gauging system under Sec.  154.1305 must be closed gauges that 
meet paragraph (a) of this section or restricted gauges that do not vent 
the cargo tank's vapor space, such as a fixed tube, slip tube, or rotary 
tube.



Sec.  154.1305  Liquid level gauging system: Standards.

    (a) Each cargo tank must have at least one liquid level gauging 
system that is operable:
    (1) At pressures up to, and including, the MARVS of the tank; and
    (2) At temperatures that are within the cargo handling temperature 
range for all cargoes carried.
    (b) Unless the cargo tank has one liquid gauging system that can be 
repaired and maintained when the tank contains cargo, each cargo tank 
must have at least two liquid level gauging systems that meet paragraph 
(a) of this section.
    (c) Each liquid level gauging system must measure liquid levels from 
400 mm (16 in.) or less from the lowest point in the cargo tank, except 
collection wells, to 100 percent full.



Sec.  154.1310  Closed gauge shut-off valve.

    Each closed gauge that is not mounted directly on the cargo tank 
must have a shut-off valve that is as close to the tank as practical.



Sec.  154.1315  Restricted gauge excess flow valve.

    Each restricted gauge that penetrates a cargo tank must have an 
excess flow valve unless the gauge meets Sec.  154.536.



Sec.  154.1320  Sighting ports, tubular gauge glasses, and flat 
plate type gauge glasses.

    (a) Cargo tanks may have sighting ports as a secondary means of 
liquid level gauging in addition to the gauges under Sec.  154.1305, if:
    (1) The tank has a MARVS that is less than 69 kPa gauge (10 psig);
    (2) The port has a protective cover and an internal scale; and
    (3) The port is above the liquid level.
    (b) Tubular gauge glasses must not be liquid level gauges for cargo 
tanks.
    (c) Plate type gauge glasses must not be liquid level gauges for 
cargo tanks, except deck tanks if the gauge connections have excess flow 
valves.



Sec.  154.1325  Liquid level alarm system: All cargo tanks.

    Except as allowed under Sec.  154.1330, each cargo tank must have a 
high liquid level alarm system that:
    (a) Is independent of the liquid level gauging system under Sec.  
154.1305;
    (b) Actuates quick-closing valves under Sec. Sec.  154.530, 154.532, 
and 154,538 or a stop valve in the cargo tank loading line to prevent 
the tank from becoming 100 percent liquid full and without causing the 
pressure in the loading lines to exceed the design pressure; and
    (c) Actuates an audible and visual alarm at the cargo control 
station at the liquid level at which the valves under paragraph (b) of 
this section are actuated or at some lower liquid level.



Sec.  154.1330  Liquid level alarm system: Independent tank type C.

    Independent tanks type C need not have the high liquid level alarm 
system under Sec.  154.1325 if:
    (a) The tank volume is less than 200 m\3\ (7,060 ft.\3\); or
    (b) The tank can withstand the maximum possible pressure during 
loading, that pressure is below the relief valve setting, and overflow 
of the tank cannot occur.



Sec.  154.1335  Pressure and vacuum protection.

    (a) Each cargo tank must have the following:
    (1) A pressure gauge that:
    (i) Monitors the vapor space;
    (ii) Is readable at the tank; and

[[Page 334]]

    (iii) Has remote readouts at the cargo control station.
    (2) If vacuum protection is required under Sec.  154.804, a vacuum 
gauge meeting paragraphs (a)(1)(i), (a)(1)(ii), and (a)(1)(iii) of this 
section.
    (b) The vessel must have at least one high pressure alarm that:
    (1) Actuates before the pressure in any cargo tank exceeds the 
maximum pressure specially approved by the Commandant (CG-OES); and
    (2) Actuates an audible and visual alarm at the cargo control 
station, and a remote group alarm in the wheelhouse.
    (c) If vacuum protection is required under Sec.  154.804, the vessel 
must have at least one low pressure alarm that:
    (1) Actuates before the pressure in any cargo tank falls below the 
minimum pressure specially approved by the Commandant (CG-522); and
    (2) Actuates an audible and visual alarm at the cargo control 
station, and a remote group alarm in the wheelhouse.
    (d) At least one pressure gauge must be fitted on each:
    (1) Enclosed hold;
    (2) Enclosed interbarrier space;
    (3) Cargo pump discharge line;
    (4) Liquid cargo manifold; and
    (5) Vapor cargo manifold.
    (e) There must be a local manifold pressure gauge between each 
manifold stop valve and each hose connection to the shore.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1340  Temperature measuring devices.

    (a) Each cargo tank must have devices that measure the temperature:
    (1) At the bottom of the tank; and
    (2) Near the top of the tank and below the maximum liquid level 
allowed under Sec.  154.1844.
    (b) Each device required by paragraph (a) must have a readout at the 
cargo control station.
    (c) Except for independent tanks type C, each cargo containment 
system for a design temperature colder than -55 [deg]C (-67 [deg]F) must 
have temperature measuring devices that meet the following:
    (1) The number and location of the devices must be specially 
approved by the Commandant (CG-OES).
    (2) The devices must be within the cargo tank's insulation or on the 
adjacent hull structure.
    (3) Each device must show the temperature continuously or at regular 
intervals of one hour or less.
    (4) Each device must actuate an audible and visual alarm at the 
cargo control station and a remote group alarm in the wheelhouse before 
the temperature of the steel of the adjacent hull structure is cooled 
below the lowest temperature allowed for the steel under Sec.  154.172.
    (d) For each cargo tank with a design temperature colder than -55 
[deg]C (-67 [deg]F), the number and arrangement of the devices that show 
the temperature of the tank during cool down procedures must be 
specially approved by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1345  Gas detection.

    (a) Each vessel carrying a cargo that is designated with an ``I'' or 
``I and T'' in Table 4 must have:
    (1) A fixed flammable gas detection system that meets Sec.  
154.1350; and
    (2) Two portable gas detectors that can each measure 0 to 100% of 
the lower flammable limit of the cargo carried.
    (b) Each vessel carrying a cargo that is designated with a ``T'' or 
``I and T'' in Table 4 must have:
    (1) Two portable gas detectors that show if the concentration of 
cargo is above or below the threshold limit value listed in 29 CFR 
1910.1000 for that cargo; and
    (2) Fixed gas sampling tubes in each hold space and interbarrier 
space with:
    (i) The number of tubes specially approved by the Commandant (CG-
OES);
    (ii) Each tube valved and capped above the main deck unless it is 
connected to a fixed toxic gas detector;
    (iii) If the vessel carries cargo that is heavier than the 
atmosphere of the space, each tube's open end in the lower part of the 
space;
    (iv) If the vessel carries cargo that is lighter than the atmosphere 
of the

[[Page 335]]

space, each tube's open end in the upper part of the space;
    (v) If the vessel carries cargo that is heavier than the atmosphere 
of the space and another cargo that is lighter than the atmosphere of 
the space, tubes with their open ends in the lower part of the space and 
tubes with their open ends in the upper part of the space; and
    (vi) If the vessel carries cargo that can be both heavier and 
lighter than the atmosphere of the space, tubes with their open ends in 
the lower part of the space and tubes with their open ends in the upper 
part of the space.
    (c) A vessel that carries methyl bromide or sulfur dioxide must have 
a fixed gas detection system that is not located in a gas-safe space.
    (d) A vessel that carries sulfur dioxide must have a fixed gas 
detection system that meets Sec.  154.1350 except paragraph (j).
    (e) Each alarm under Sec.  154.1350(e) on a vessel that carries 
methyl bromide or sulfur dioxide must be set at or below the threshold 
limit value listed in 29 CFR 1910.1000 for the cargo carried.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1350  Flammable gas detection system.

    (a) The vessel must have a fixed flammable gas detection system that 
has sampling points in:
    (1) Each cargo pump room;
    (2) Each cargo compressor room;
    (3) Each motor room for cargo handling machinery;
    (4) Each cargo control station that is not gas-safe;
    (5) Each hold space, interbarrier space, and other enclosed spaces, 
except fuel oil or ballast tanks, in the cargo area, unless the vessel 
has independent tanks type C; and
    (6) Each space between the doors of an air lock under Sec.  154.345.
    (b) The sampling points under paragraph (a) of this section must 
meet Sec.  154.1345(b)(2) (iii) through (vi).
    (c) Gas sampling lines for the flammable gas detection system must 
not pass through any gas-safe space, except the gas-safe space in which 
the gas detection equipment is located.
    (d) Gas detection systems must have a readout with meters that show 
flammable gas concentration over the concentration or volume ranges 
under paragraph (t) or (u) of this section.
    (e) Each flammable gas detection system must have audible and visual 
alarms that are actuated at a cargo concentration that is 30% or less of 
the lower flammable limit in air of the cargo carried.
    (f) Each flammable gas detection system must have an audible and 
visual alarm for power failure and loss of gas sampling flow.
    (g) The alarms under paragraphs (e) and (f) of this section must 
signal in the space where the gas detection system's readout is located 
and must meet Sec.  154.1365.
    (h) Remote group alarms, that indicate that one of the alarm 
conditions under paragraphs (e) and (f) of this section exists, must 
meet Sec.  154.1365 and must be in each wheelhouse and in each cargo 
control station if the gas detection system's readout is not located in 
those spaces.
    (i) Each flammable gas detection system must monitor each sampling 
point at 30 minute or shorter intervals.
    (j) Electrical equipment for each flammable gas detection system 
that is in a gas-dangerous space or area must meet Sec. Sec.  154.1000 
through 154.1015.
    (k) Each flammable gas detection system must have enough flame 
arrestors for all gas sampling lines to prevent flame propagation to the 
spaces served by the system through the sampling lines.
    (l) Each flammable gas detection system must have a filter that 
removes particulate matter in each gas sampling line.
    (m) Each filter under paragraph (l) of this section must be located 
where it can be removed during vessel operation, unless it can be freed 
by back pressure.
    (n) Each flammable gas detection system in a gas-safe space must:
    (1) Have a shut-off valve in each sampling line from an enclosed 
space, such as a hold or interbarrier space; and
    (2) Exhaust gas to a safe location in the open atmosphere and away 
from all ignition sources.

[[Page 336]]

    (o) Each flammable gas detection system must not have common 
sampling lines, except sampling lines may be manifolded at the gas 
detector location if each line has an automatic valve that prevents 
cross-communication between sampling points.
    (p) Each flammable gas detection system must have at least one 
connection for injecting zero gas and span gas into the system for 
testing and calibration.
    (q) Each flammable gas detection system must have span gas for 
testing and calibration that is of known concentration.
    (r) The calibration test procedure and type and concentration of 
span gas under paragraph (q) of this section must be on or in each gas 
analyzer cabinet.
    (s) Each flammable gas detection system must have at least one flow 
meter capable of measuring the flow to the gas analyzer, and must 
provide a means for ensuring that there is a positive flow in the right 
direction in each sampling line at all times.
    (t) Each flammable gas detection system must measure gas 
concentrations that:
    (1) Are at least 0% through 200% of the alarm concentration; and
    (2) Allow calibration of the equipment with span gas.
    (u) In each hold and each interbarrier space that contains tanks 
other than independent tanks type A, B, or C, the flammable gas 
detection system must measure cargo concentrations of 0 to 100% by 
volume with:
    (1) An analyzer other than the one under paragraph (t) of this 
section; or
    (2) The analyzer under paragraph (t) of this section with a scale 
switch that automatically returns the analyzer to the concentration 
range under paragraph (t) of this section when released.



Sec.  154.1360  Oxygen analyzer.

    The vessel must have a portable analyzer that measures oxygen levels 
in an inert atmosphere.



Sec.  154.1365  Audible and visual alarms.

    (a) Each audible alarm must have an arrangement that allows it to be 
turned off after sounding. For remote group alarms this arrangement must 
not interrupt the alarm's actuation by other faults.
    (b) Each visual alarm must be one that can be turned off only after 
the fault that actuated it is corrected.
    (c) Each visual alarm must be marked to show the type and, except 
for remote group alarms, the location of each fault that actuates it.
    (d) Each vessel must have means for testing each alarm.



Sec.  154.1370  Pressure gauge and vacuum gauge marking.

    Each pressure gauge and vacuum gauge under Sec.  154.1335(a) must be 
marked with the maximum and minimum pressures that are specified on the 
vessel's certificate for the cargo carried.



Sec.  154.1375  Readout for temperature measuring device: Marking.

    Each readout under Sec.  154.1340 for a device that measures 
temperature in a cargo tank must be marked with the design temperature 
specified for the cargo tank on the vessel's certificate.

                            Safety Equipment



Sec.  154.1400  Safety equipment: All vessels.

    (a) Instead of the equipment under Sec.  35.30-20 of this chapter, a 
vessel of less than 25,000 m\3\ cargo capacity must have the following 
personnel safety equipment:
    (1) Six self-contained, pressure-demand-type, air-breathing 
apparatus approved by the Mining Enforcement and Safety Administration 
(MESA) or the National Institute for Occupational Safety and Health 
(NIOSH), each having at least a 30 minute capacity.
    (2) Nine spare bottles of air for the self-contained air-breathing 
apparatus, each having at least a 30 minute capacity.
    (3) Six steel-cored lifelines.
    (4) Six Type II or Type III flashlights constructed and marked in 
accordance with ASTM F 1014 (incorporated by reference, see Sec.  
154.1).
    (5) Three fire axes.
    (6) Six helmets that meet ANSI Safety Requirements for Industrial 
Head Protection, Z-89.1 (1969).

[[Page 337]]

    (7) Six sets of boots and gloves that are made of rubber or other 
electrically non-conductive material.
    (8) Six sets of goggles that meet the specifications of ANSI 
Practice for Occupational and Educational Eye and Face Protection, Z-
87.1 (1979).
    (9) Three outfits that protect the skin from scalding steam and the 
heat of a fire, and that have a water resistant outer surface.
    (10) Three chemical protective outfits that protect the wearers from 
the particular personnel hazards presented by the cargo vapor.
    (b) Instead of the equipment under Sec.  35.30-20 of this chapter, a 
vessel of 25,000 m\3\ cargo capacity or more must have the following 
personnel safety equipment:
    (1) Eight self-contained, pressure-demand-type, air-breathing 
apparatus approved by the Mining Enforcement and Safety Administration 
(MESA) or the National Institute for Occupational Safety and Health 
(NIOSH), each having at least a 30 minute capacity.
    (2) Nine spare bottles of air for the self-contained air-breathing 
apparatus, each having at least a 30 minute capacity.
    (3) Eight steel-cored lifelines.
    (4) Eight Type II or Type III flashlights constructed and marked in 
accordance with ASTM F 1014 (incorporated by reference, see Sec.  
154.1).
    (5) Three fire axes.
    (6) Eight helmets that meet ANSI Safety Requirements for Industrial 
Head Protection, Z-89.1 (1969).
    (7) Eight sets of boots and gloves that are made of rubber or other 
electrically non-conductive material.
    (8) Eight sets of goggles that meet the specifications of ANSI 
Practice for Occupational and Educational Eye and Face Protection, Z-
87.1 (1979).
    (9) Five outfits that protect the skin from scalding steam and the 
heat of a fire, and that have a water resistant outer surface.
    (10) Three chemical protective outfits that protect the wearers from 
the particular personnel hazards presented by the cargo vapor.
    (c) When Table 4 references this section, a vessel carrying the 
listed cargo must have the following additional personnel protection 
equipment:
    (1) Three self-contained, pressure-demand-type, air-breathing 
apparatus approved by the Mining Enforcement and Safety Administration 
(MESA) or the National Institute for Occupational Safety and Health 
(NIOSH), each having at least a 30 minute capacity.
    (2) Nine spare bottles of air for the self-contained air-breathing 
apparatus, each having at least a 30 minute capacity.
    (3) Three steel-cored lifelines.
    (4) Three Type II or Type III flashlights constructed and marked in 
accordance with ASTM F 1014 (incorporated by reference, see Sec.  
154.1).
    (5) Three helmets that meet ANSI Safety Requirements for Industrial 
Head Protection, Z-89.1 (1969).
    (6) Three sets of boots and gloves that are made of rubber or other 
electrically non-conductive material.
    (7) Three sets of goggles that meet the specifications of ANSI 
Practice for Occupational and Educational Eye and Face Protection, Z-
87.1 (1979).
    (8) Three chemical protective outfits that protect the wearers from 
the particular personnel hazards presented by the cargo vapor.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 77-069, 52 FR 
31630, Aug. 21, 1987; CGD 82-042, 17705, May 18, 1988; USCG-1999-5151, 
64 FR 67183, Dec. 1, 1999]



Sec.  154.1405  Respiratory protection.

    When Table 4 references this section, a vessel carrying the listed 
cargo must have:
    (a) Respiratory protection equipment for each person on board that 
protects the person from the cargo vapor for at least 5 minutes; and
    (b) Two additional sets of respiratory protection equipment that:
    (1) Are stowed in the wheelhouse; and
    (2) Protects the wearer from the cargo vapor for at least 5 minutes.



Sec.  154.1410  Decontamination shower.

    When Table 4 references this section, a vessel carrying the listed 
cargo must have a decontamination shower and an eye wash that:
    (a) Are on the weatherdeck; and
    (b) Have their location marked EMERGENCY SHOWER in letters:
    (1) 7.6 cm (3 in.) high; and
    (2) 5.1 cm (2 in.) wide.

[[Page 338]]



Sec.  154.1415  Air compressor.

    Each vessel must have an air compressor to recharge the bottles for 
the air-breathing apparatus.



Sec.  154.1420  Stretchers and equipment.

    Each vessel must have:
    (a) Two stretchers or wire baskets; and
    (b) Equipment for lifting an injured person from a cargo tank, hold, 
or void space.



Sec.  154.1430  Equipment locker.

    One of each item of equipment under Sec. Sec.  154.1400 and 154.1420 
must be stowed in a marked locker:
    (a) On the open deck in or adjacent to the cargo area; or
    (b) In the accommodation house, near to a door that opens onto the 
main deck.



Sec.  154.1435  Medical first aid guide.

    Each vessel must have a copy of the IMO Medical First Aid Guide for 
Use in Accidents Involving Dangerous Goods, printed by IMO, London, U.K.



Sec.  154.1440  Antidotes.

    Each vessel must have the antidotes prescribed in the IMO Medical 
First Aid Guide for Use in Accidents Involving Dangerous Goods, printed 
by IMO, London, U.K. for the cargoes being carried.



           Subpart D_Special Design and Operating Requirements



Sec.  154.1700  Purpose.

    This subpart prescribes design and operating requirements that are 
unique for certain cargoes regulated by this part.



Sec.  154.1702  Materials of construction.

    When Table 4 references one of the following paragraphs in this 
section, the materials in the referenced paragraph must not be in 
components that contact the cargo liquid or vapor:
    (a) Aluminum and aluminum bearing alloys.
    (b) Copper and copper bearing alloys.
    (c) Zinc or galvanized steel.
    (d) Magnesium.
    (e) Mercury.
    (f) Acetylide forming materials, such as copper, silver, and 
mercury.



Sec.  154.1705  Independent tank type C.

    The following cargoes must be carried in an independent tank type C 
that meets Sec.  154.701(a):
    (a) Ethylene oxide.
    (b) Methyl bromide.
    (c) Sulfur dioxide.



Sec.  154.1710  Exclusion of air from cargo tank vapor spaces.

    When a vessel is carrying acetaldehyde, butadiene, ethylene oxide, 
or vinyl chloride, the master shall ensure that air is:
    (a) Purged from the cargo tanks and associated piping before the 
cargo is loaded; and
    (b) Excluded after the cargo is loaded by maintaining a positive 
pressure of at least 13.8 kPa gauge (2 psig) by:
    (1) Introducing a gas that:
    (i) Is not reactive;
    (ii) Is not flammable; and
    (iii) Does not contain more than 0.2% oxygen by volume; or
    (2) Controlling the cargo temperature.



Sec.  154.1715  Moisture control.

    When a vessel is carrying sulfur dioxide, the master shall ensure 
that:
    (a) A cargo tank is dry before it is loaded with sulfur dioxide; and
    (b) Air or inert gas admitted into a cargo tank carrying sulfur 
dioxide during discharging or tank breathing has a moisture content 
equal to or less than the moisture content of air with a dew point of -
45 [deg]C (-49 [deg]F) at atmospheric pressure.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by USCG-2014-0688, 79 
FR 58285, Sept. 29, 2014]



Sec.  154.1720  Indirect refrigeration.

    A refrigeration system that is used to cool acetaldehyde, ethylene 
oxide, or methyl bromide, must be an indirect refrigeration system that 
does not use vapor compression.



Sec.  154.1725  Ethylene oxide.

    (a) A vessel carrying ethylene oxide must:

[[Page 339]]

    (1) Have cargo piping, vent piping, and refrigeration equipment that 
have no connections to other systems;
    (2) Have valves, flanges, fittings, and accessory equipment made of 
steel, stainless steel, except types 416 and 442, or other material 
specially approved by the Commandant (CG-OES);
    (3) Have valve disk faces, and other wearing parts of valves made of 
stainless steel containing not less than 11% chromium;
    (4) Have gaskets constructed of spirally wound stainless steel with 
Teflon or other material specially approved by the Commandant (CG-OES);
    (5) Not have asbestos, rubber, or cast iron components in the cargo 
containment system and piping;
    (6) Not have threaded joints in cargo piping;
    (7) Have a water spray system under Sec.  154.1105 that protects the 
above deck cargo piping; and
    (8) Have a nitrogen inerting system or on board nitrogen gas storage 
that can inert the vapor space of an ethylene oxide cargo tank for a 
period of 30 days under the condition of paragraph (e) of this section.
    (b) Cargo hose used for ethylene oxide must:
    (1) Be specially approved by the Commandant (CG-OES); and
    (2) Be marked ``For (Alkylene or Ethylene) Oxide Transfer Only.''
    (c) Ethylene oxide must be maintained at less than 30 [deg]C (86 
[deg]F).
    (d) Cargo tank relief valves for tanks containing ethylene oxide 
must be set at 539 kPa gauge (78.2 psig) or higher.
    (e) The vapor space of a cargo tank carrying ethylene oxide must be 
maintained at a nitrogen concentration of 45% by volume.
    (f) A vessel must have a method for jettisoning ethylene oxide that 
meets Sec. Sec.  154.356 and 154.1872.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983; USCG-2014-0688, 79 FR 58285, Sept. 29, 2014]



Sec.  154.1730  Ethylene oxide: Loading and off loading.

    (a) The master shall ensure that before ethylene oxide is loaded 
into a cargo tank:
    (1) The tank is thoroughly clean, dry, and free of rust;
    (2) The hold spaces are inerted with an inert gas that meets Sec.  
154.1710(b)(1); and
    (3) The cargo tank vapor space is inerted with nitrogen.
    (b) Ethylene oxide must be off loaded by a deepwell pump or inert 
gas displacement.
    (c) Ethylene oxide must not be carried in deck tanks.



Sec.  154.1735  Methyl acetylene-propadiene mixture.

    (a) The composition of the methyl acetylene-propadiene mixture at 
loading must be within the following limits or specially approved by the 
Commandant (CG-OES):
    (1) One composition is:
    (i) Maximum methyl acetylene and propadiene molar ratio of 3 to 1;
    (ii) Maximum combined concentration of methyl acetylene and 
propadiene of 65 mole percent;
    (iii) Minimum combined concentration of propane, butane, and 
isobutane of 24 mole percent, of which at least one-third (on a molar 
basis) must be butanes and one-third propane; and
    (iv) Maximum combined concentration of propylene and butadiene of 10 
mole percent.
    (2) A second composition is:
    (i) Maximum methyl acetylene and propadiene combined concentration 
of 30 mole percent;
    (ii) Maximum methyl acetylene concentration of 20 mole percent;
    (iii) Maximum propadiene concentration of 20 mole percent;
    (iv) Maximum propylene concentration of 45 mole percent;
    (v) Maximum butadiene and butylenes combined concentration of 2 mole 
percent;
    (vi) A minimum saturated C 4 hydrocarbon concentration of 
4 mole percent; and
    (vii) A minimum propane concentration of 25 mole percent.
    (b) A vessel carrying a methyl acetylene-propadiene mixture must 
have a refrigeration system without vapor compression or have a 
refrigeration system with the following features:
    (1) A vapor compressor that does not raise the temperature and 
pressure of

[[Page 340]]

the vapor above 60 [deg]C (140 [deg]F) and 1.72 MPa gauge (250 psig) 
during its operation and that does not allow vapor to stagnate in the 
compressor while it continues to run.
    (2) Discharge piping from each compressor stage or each cylinder in 
the same stage of a reciprocating compressor that has:
    (i) Two temperature actuated shutdown switches set to operate at 60 
[deg]C (140 [deg]F) or less;
    (ii) A pressure actuated shutdown switch set to operate at 1.72 MPa 
gauge (250 psig) or less; and
    (iii) A safety relief valve set to relieve at 1.77 MPa gauge (256 
psig) or less.
    (3) A relief valve that vents to a mast meeting Sec.  154.805 and 
that does not relieve into the compressor suction line.
    (4) An alarm that sounds in the cargo control station and in the 
wheelhouse when any of the high pressure or high temperature switches 
under paragraphs (b)(2)(i) and (b)(2)(ii) of this section operate.
    (c) A vessel carrying a methyl acetylene-propadiene mixture must 
have separate cargo piping, vent piping, and refrigeration equipment for 
methyl acetylene-propadiene that are segregated from other cargo piping, 
vent piping and refrigeration equipment on the vessel.

[CGD 74-289, 44 FR 26009, May 3, 1979; 44 FR 59234, Oct. 15, 1979; CGD 
82-063b, 48 FR 4782, Feb. 3, 1983]



Sec.  154.1740  Vinyl chloride: Inhibiting and inerting.

    When a vessel is carrying vinyl chloride, the master shall ensure 
that:
    (a) Section 154.1818 is met; or
    (b) Section 154.1710 is met, and the oxygen content of inert gas is 
less than 0.1% by volume.



Sec.  154.1745  Vinyl chloride: Transferring operations.

    A vessel carrying vinyl chloride must meet the requirements of Sec.  
151.50-34(g) through (k) of this chapter.

[CGD 95-012, 60 FR 48051, Sept. 18, 1995]



Sec.  154.1750  Butadiene or vinyl chloride: Refrigeration system.

    A refrigeration system for butadiene or vinyl chloride must not use 
vapor compression unless it:
    (a) Avoids any stagnation points where uninhibited liquid can 
accumulate; or
    (b) Has inhibited liquid from the cargo tank added to the vapor 
upstream of the condenser.



Sec.  154.1755  Nitrogen.

    Except for deck tanks and their piping systems, cargo containment 
systems and piping systems carrying nitrogen must be specially approved 
by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1760  Liquid ammonia.

    The master shall ensure that no person sprays liquid ammonia into a 
cargo tank containing more than 8% oxygen by volume.



                          Subpart E_Operations



Sec.  154.1800  Special operating requirements under Part 35 of 
this chapter.

    Each vessel must meet the requirements of Part 35 of this chapter 
except Sec.  35.30-20.



Sec.  154.1801  Certificates, letters, and endorsements: U.S.
flag vessels.

    No person may operate a U.S. flag vessel unless the vessel has a 
Certificate of Inspection, issued under Subchapter D of this chapter, 
which is endorsed with the name of the cargo that it is allowed to 
carry.



Sec.  154.1802  Certificates, letters and endorsements: Foreign 
flag vessels.

    (a) No person may operate on the navigable waters of the United 
States a foreign flag vessel, whose flag administration issues IMO 
Certificates, unless the vessel has:
    (1) An IMO Certificate issued by the flag administration that is 
endorsed with the name of the cargo that it is

[[Page 341]]

allowed to carry, and, except when entering United States waters to be 
examined as required by Sec.  154.150, a Certificate of Compliance \1\ 
issued by the Coast Guard endorsed under this part with the name of the 
cargo that it is allowed to carry; or
    (2) Special approval under Sec.  154.30.
    (b) No person may operate on the navigable waters of the United 
States a foreign flag vessel, whose flag administration does not issue 
IMO Certificates, unless the vessel has:
    (1) Except when entering United States waters to be examined as 
required by Sec.  154.150, a Certificate of Compliance \1\ issued by the 
Coast Guard endorsed under this part with the name of the cargo it is 
allowed to carry; or
---------------------------------------------------------------------------

    \1\ Until the Certificate of Compliance form is developed, the 
Letter of Compliance with a Subchapter O endorsement for the carriage of 
liquefied gases will serve the purpose of the endorsed Certificate of 
Compliance.
---------------------------------------------------------------------------

    (2) Special approval under Sec.  154.30.
    (c) No person may operate on the navigable waters of the United 
States a foreign flag vessel unless the vessel has onboard the following 
plans and information which except for the certificates under paragraph 
(c)(1) of this section, are in English:
    (1) The vessel's Cargo Ship Safety Construction Certificate and 
Cargo Ship Safety Equipment Certificate issued under the International 
Convention for Safety of Life at Sea, 1974.
    (2) A description and schematic plan of the arrangement for inerting 
cargo tanks, hold spaces, and interbarrier spaces.
    (3) A description of the cargo tank gauging equipment.
    (4) A description and instruction manual for the calibration of the 
cargo leak detector equipment.
    (5) A schematic plan that shows the locations of leak detectors and 
sampling points.
    (6) If the vessel carries methane, a description of the systems for 
cargo temperature and pressure control. (See Sec. Sec.  154.703 through 
154.709).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 81-052, 50 FR 
8735, Mar. 5, 1985; CGD 77-069, 52 FR 31631, Aug. 21, 1987; CGD 90-008, 
55 FR 30663, July 26, 1990]



Sec.  154.1803  Expiration of Certificates of Compliance.

    (a) A Certificate of Compliance expires after a period not to exceed 
twenty-four months from the date of the examination under Sec.  154.150.
    (b) If a vessel's IMO Certificate of Fitness expires or otherwise 
becomes invalid, its Certificate of Compliance becomes invalid for the 
carriage of cargoes listed in Table 4 of this part or authorized by 
special approval under Sec.  154.12. To maintain the validity of the 
Certificate of Compliance, the vessel's owner must submit a copy of any 
revised or reissued IMO Certificate to Commanding Officer, Marine Safety 
Center.

[CGD 81-052, 50 FR 8735, Mar. 5, 1985; CGD 95-072, 60 FR 50466, Sept. 
29, 1995; 60 FR 54106, Oct. 19, 1995]



Sec.  154.1804  Document posted in wheelhouse.

    No person may operate a U.S. flag vessel unless the documents under 
Sec.  154.1801 are under glass in a conspicuous place in the wheelhouse.



Sec.  154.1806  Regulations on board.

    No person may operate a U.S. flag vessel unless a copy of this part 
and a copy of Part 35 of this chapter are on board.



Sec.  154.1808  Limitations in the endorsement.

    No person may operate a vessel unless that person complies with all 
limitations in the endorsement on the vessel's Certificate of Inspection 
or Certificate of Compliance.

[CGD 81-052, 50 FR 8735, Mar. 5, 1985]



Sec.  154.1809  Loading and stability manual.

    (a) No person may operate a vessel unless that vessel has on board a 
loading and stability manual.
    (b) The loading and stability manual must contain:
    (1) Information that enables the master to load and ballast the 
vessel while keeping structural stresses within design limits; and

[[Page 342]]

    (2) The information required by Sec.  170.110 of this chapter.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 79-023, 49 FR 
51010, Nov. 4, 1983]



Sec.  154.1810  Cargo manual.

    (a) No person may operate a foreign flag vessel, whose flag 
administration does not issue IMO Certificates, on the navigable waters 
of the United States, or a U.S. flag vessel, unless the vessel has on 
board a cargo manual containing the following information:
    (1) A description of each cargo carried, its handling hazards as a 
liquid or as a gas including frostbite or asphyxiation, its safety 
equipment and necessary first aid measures required by this part.
    (2) A description of the dangers of asphyxiation from the inerting 
gases used on the vessel.
    (3) The measures that mitigate embrittlement of steel structure in 
way of cargo leakage.
    (4) The use of the firefighting systems on the vessel.
    (5) The features of the cargo containment system that affect its 
operation and maintenance, including pressure and temperature ranges and 
relief valve settings.
    (6) Pressures, temperatures, and liquid levels for all operations.
    (7) General information derived from the first loading of the 
vessel.
    (8) Alarm settings.
    (9) Descriptions of the components of the cargo system, including 
the following:
    (i) Liquid cargo system.
    (ii) Liquid recirculating or condensate return system.
    (iii) Cargo tank cool-down system.
    (iv) Cargo tank warm-up or vaporization system.
    (v) Gas main system.
    (vi) Cargo tank or compressor relief system and blocked liquid or 
gas relief system.
    (vii) Inerting system.
    (viii) Boil-off gas compressor or reliquefaction system.
    (ix) Gas detection systems.
    (x) Alarm or safety indication systems.
    (xi) Cargo jettisoning system.
    (xii) The system for using boil-off gas as fuel.
    (10) A description of cargo loading and discharge operations, 
including simultaneous handling of multigrades of cargo and ballast.
    (11) A description of cargo operations during the voyage.
    (12) A description of cargo tank cool-down and warm-up operations 
including purging with inert gas and air.
    (13) A description of hull and cargo tank temperature monitoring 
systems.
    (14) A description of gas detection systems and alarm or safety 
systems.
    (15) A description of the following conditions and their symptoms, 
including emergency measures and corrective actions:
    (i) Cargo or ballast valve malfunction.
    (ii) Low cargo tank gas pressure.
    (iii) High fill level shutdown.
    (iv) Gas compressor shutdown.
    (v) Hull cold spots.
    (vi) Cargo piping leaks.
    (vii) Primary or secondary barrier failure.
    (viii) Hold boundary structural failure.
    (ix) Fire in vent mast head.
    (x) Reliquefaction plant failure.
    (xi) Vaporizer malfunction or failure.
    (xii) Piping or cargo valve freeze-up.
    (16) Any other matters relating to operation of the cargo systems.
    (17) The operational means to maintain the vessel in a condition of 
positive stability in accordance with the loading and stability manual 
under Sec.  154.1809 through all conditions of:
    (i) Loading and deballasting; and
    (ii) Unloading and ballasting.
    (b) The master shall ensure that the cargo manual is kept up-to-
date.



Sec.  154.1812  Operational information for terminal personnel.

    The master shall ensure that terminal personnel are told the 
operational information required by Sec.  154.1810(a)(17).



Sec.  154.1814  Cargo information cards.

    (a) No person may operate a vessel unless a cargo information card 
for each cargo being transported is carried either in the wheelhouse, in 
the ship's

[[Page 343]]

office, or in another location easily accessible to the person in charge 
of the watch.
    (b) When a vessel is moored at a terminal, the master shall ensure 
that a set of information cards is in the possession of the terminal's 
person in charge of cargo transfer operations.
    (c) Each card must be at least 17 cm x 24 cm (6\3/4\ in. x 9\1/2\ 
in.), have printing on one side only, and must contain the following 
information about the cargo:
    (1) Name as listed in Table 4.
    (2) Appearance.
    (3) Odor.
    (4) Safe handling procedures, including special handling 
instructions, and handling hazards.
    (5) Procedures to follow in the event of spills, leaks, or 
uncontrolled cargo release.
    (6) Procedures to be followed if a person is exposed to the cargo.
    (7) Firefighting procedures and materials.



Sec.  154.1816  Cargo location plan.

    The master shall ensure that:
    (a) A cargo location plan is prepared that gives:
    (1) The location and number of each cargo tank; and
    (2) The name of the cargo in each tank;
    (b) One cargo location plan is kept with the sets of cargo 
information cards required under Sec.  154.1814; and
    (c) The cargo names in the cargo location plan do not differ from 
the names of the cargoes listed in Table 4.



Sec.  154.1818  Certification of inhibition.

    (a) Except as provided in Sec.  154.1740(b), no person may operate a 
vessel carrying butadiene or vinyl chloride without carrying in the 
wheelhouse written certification from the shipper that the product is 
inhibited.
    (b) The certification required by this section must contain the 
following information:
    (1) The name and concentration of the inhibitor.
    (2) The date the inhibitor was added.
    (3) The expected duration of the inhibitor's effectiveness.
    (4) Any temperature limitations qualifying the inhibitor's effective 
lifetime.
    (5) The action to be taken if the time of the voyage exceeds the 
inhibitor's lifetime.



Sec.  154.1820  Shipping document.

    No person may operate a vessel without carrying a shipping document 
in the wheelhouse that lists for each cargo on board:
    (a) The cargo tank in which the cargo is stowed;
    (b) The name of the shipper;
    (c) The location of the loading terminal;
    (d) The cargo name as listed in Table 4; and
    (e) The approximate quantity of the cargo.



Sec.  154.1822  Shipping document: Copy for transfer terminal.

    While a vessel is moored at a transfer terminal, the master shall 
ensure that at least one copy of the shipping document is given to the 
terminal's person in charge of cargo transfer.



Sec.  154.1824  Obstruction of pumproom ladderways.

    The master shall ensure that each cargo pumproom access is 
unobstructed.



Sec.  154.1826  Opening of cargo tanks and cargo sampling.

    (a) The master shall ensure that each cargo tank opening is fully 
closed at all times.
    (b) The master may authorize the opening of a cargo tank:
    (1) During tank cleaning; and
    (2) To sample a cargo that Table 4 allows to be carried in a 
containment system having a restricted gauging system if:
    (i) The cargo tank is not being filled during sampling;
    (ii) The vent system has relieved any pressure in the tank; and
    (iii) The person sampling the cargo wears protective clothing.
    (c) The master shall ensure that cargoes requiring closed gauging as 
listed in Table 4 are sampled only through the controlled sampling 
arrangement of the cargo tank.

[[Page 344]]



Sec.  154.1828  Spaces containing cargo vapor: Entry.

    (a) No person may enter a cargo handling space without the 
permission of the master or without following a safety procedure 
established by the master.
    (b) Before allowing anyone to enter a cargo handling space, the 
master shall ensure that:
    (1) The space is free of toxic vapors and has an oxygen 
concentration of at least 19.5 percent oxygen by volume; or
    (2) Those entering the space wear protective equipment with 
breathing apparatus and an officer closely supervises the entire 
operation in the space.



Sec.  154.1830  Warning sign.

    (a) The master shall ensure that a vessel transferring cargo, while 
fast to a dock or while at anchor in port, displays a warning sign:
    (1) At the gangway facing the shore so that the sign may be seen 
from the shore; and
    (2) Facing outboard towards the water so that the sign may be seen 
from the water.
    (b) Except as provided in paragraph (e) of this section, each 
warning sign must have the following words:
    (1) Warning.
    (2) Dangerous Cargo.
    (3) No Visitors.
    (4) No Smoking.
    (5) No Open Lights.
    (c) Each letter in the words on the sign must:
    (1) Be block style;
    (2) Be black on a white background;
    (3) Be 7.6 cm (3 in.) high;
    (4) Be 5.1 cm (2 in.) wide, except for ``M'' and ``W'' which must be 
7.6 cm (3 in.) wide, and the letter ``I'' which may be 1.3 cm (\1/2\ 
in.) wide; and
    (5) Have 1.3 cm (\1/2\ in.) stroke width.
    (d) The spacing between letters must be:
    (1) 1.3 cm (\1/2\ in.) between letters of the same word on the sign;
    (2) 5.1 cm (2 in.) between words;
    (3) 5.1 cm (2 in.) between lines; and
    (4) 5.1 cm (2 in.) at the borders of the sign.
    (e) The words ``No Smoking'' and ``No Open Lights'' may be omitted 
when the cargoes on board a vessel are not flammable.
    (f) When a vessel carries or transfers vinyl chloride, the warning 
sign under paragraph (b) of this section must also have the words 
``Cancer Suspect Agent.''



Sec.  154.1831  Persons in charge of transferring liquid cargo in bulk
or preparing cargo tanks.

    (a) The owner and operator of the vessel, and his or her agent, and 
each of them, shall ensure that--
    (1) Enough ``Tankerman-PICs'' or restricted ``Tankerman-PICs'', and 
``Tankerman-Assistants'', authorized for the classification of cargo 
carried, are on duty to safely conduct a transfer of liquid cargo in 
bulk or a cool-down, warm-up, gas-free, or air-out of each cargo tank;
    (2) Each transfer of liquid cargo in bulk, and each cool-down, warm-
up, gas-free, or air-out of a cargo tank, is supervised by a person 
designated as a person in charge of the transfer that possesses the 
qualifications required by 33 CFR 155.710;
    (3) On each foreign tankship, the person in charge of either a 
transfer of liquid cargo in bulk or a cool-down, warm-up, gas-free, or 
air-out of a cargo tank possesses the qualifications required by 33 CFR 
155.710;
    (4) When cargo regulated under this part is being transferred, the 
person in charge of the transfer has received special training in the 
particular hazards associated with the cargo and in all special 
procedures for its handling; and
    (5) On each foreign vessel, the person in charge understands his or 
her responsibilities as described in this subchapter.
    (b) Upon request by the Officer in Charge, Marine Inspection, in 
whose zone the transfer will take place, the owner and operator of the 
vessel, and his or her agent, and each of them, shall provide 
documentary evidence that the person in charge has received the training 
specified by paragraph (a)(4) of this section and is capable of 
competently performing the procedures necessary for the cargo.

[CGD 79-116, 60 FR 17158, Apr. 4, 1995]

[[Page 345]]



Sec.  154.1834  Cargo transfer piping.

    The person in charge of cargo transfer shall ensure that cargo is 
transferred to or from a cargo tank only through the cargo piping 
system.



Sec.  154.1836  Vapor venting as a means of cargo tank pressure 
and temperature control.

    When the vessel is on the navigable waters of the United States, the 
master shall ensure that the cargo pressure and temperature control 
system under Sec. Sec.  154.701 through 154.709 is operating and that 
venting of cargo is unnecessary to maintain cargo temperature and 
pressure control, except under emergency conditions.



Sec.  154.1838  Discharge by gas pressurization.

    The person in charge of cargo transfer may not authorize cargo 
discharge by gas pressurization unless:
    (a) The tank to be offloaded is an independent tank type B or C;
    (b) The pressurizing medium is the cargo vapor or a nonflammable, 
nontoxic gas that is inert with the cargo; and
    (c) The pressurizing line has:
    (1) A pressure reducing valve that has a setting that is 90 percent 
or less of the tank's relief valve setting; and
    (2) A manual control valve between the pressure reducing valve and 
the tank.



Sec.  154.1840  Protective clothing.

    The person in charge of cargo transfer shall ensure that each person 
involved in a cargo transfer operation, except those assigned to gas-
safe cargo control rooms, wears protective clothing.



Sec.  154.1842  Cargo system: Controls and alarms.

    The master shall ensure that the cargo emergency shut-down system 
and the alarms under Sec.  154.1325 are tested and working before cargo 
is transferred.



Sec.  154.1844  Cargo tanks: Filling limits.

    (a) Unless a higher limit is specified on the certificate the master 
shall ensure that a cargo tank is not loaded:
    (1) More than 98 percent liquid full; or
    (2) In excess of the volume determined under the following formula:
    [GRAPHIC] [TIFF OMITTED] TC02FE91.089
    
where:

VL = maximum volume to which the tank may be loaded;
V = volume of the tank;
dr = density at the reference temperature specified in 
          paragraph (b) of this section; and
dL = density of the cargo at the loading temperature and 
          pressure.

    (b) The reference temperature to be used in paragraph (a)(2) of this 
section is the temperature corresponding to the vapor pressure of the 
cargo at the set pressure of the pressure relief valves.



Sec.  154.1846  Relief valves: Changing set pressure.

    The master shall:
    (a) Supervise the changing of the set pressure of relief valves 
under Sec.  154.802(b);
    (b) Enter the change of set pressure in the vessel's log; and
    (c) Ensure that a sign showing the set pressure is posted:
    (1) In the cargo control room or station; and
    (2) At each relief valve.



Sec.  154.1848  Inerting.

    (a) The master shall ensure that:
    (1) Hold and interbarrier spaces on a vessel with full secondary 
barriers are inerted so that the oxygen concentration is 8 percent or 
less by volume when flammable cargoes are carried;
    (2) Hold and interbarrier spaces contain only dry air or inert gas 
on:
    (i) A vessel with partial secondary barriers;
    (ii) A vessel with full secondary barriers when non-flammable 
cargoes are carried; and
    (iii) A vessel with refrigerated independent tanks type C;
    (3) When cargo tanks containing flammable vapor are to be gas freed, 
the flammable vapors are purged from the tank by inert gas before air is 
admitted; and

[[Page 346]]

    (4) When gas free cargo tanks are to be filled with a flammable 
cargo, air is purged from the tank by inert gas until the oxygen 
concentration in the tank is 8 percent or less by volume before cargo 
liquid or vapor is introduced.
    (b) Inert gas must be supplied from the shore or from the vessel's 
inert gas system.



Sec.  154.1850  Entering cargo handling spaces.

    (a) The master shall ensure that the ventilation system under Sec.  
154.1200 is in operation for 30 minutes before a person enters one of 
the following:
    (1) Spaces containing cargo pumps, compressors, and compressor 
motors.
    (2) Gas-dangerous cargo control spaces.
    (3) Other spaces containing cargo handling equipment.
    (b) The master shall ensure that a warning sign listing the 
requirement for use of the ventilation system, is posted outside of each 
space under paragraph (a) of this section.
    (c) The master shall ensure that no sources of ignition are put in a 
cargo handling space on a vessel carrying flammable cargo unless the 
space is gas free.



Sec.  154.1852  Air breathing equipment.

    (a) The master shall ensure that a licensed officer inspects the 
compressed air breathing equipment at least once each month.
    (b) The master shall enter in the vessel's log a record of the 
inspection required under paragraph (a) of this section that includes:
    (1) The date of the inspection; and
    (2) The condition of the equipment at the time of the inspection.



Sec.  154.1854  Methane (LNG) as fuel.

    (a) If methane (LNG) vapors are used as fuel in the main propulsion 
system of a vessel, the master shall ensure that the fuel oil fired 
pilot under Sec.  154.705(c) is used when the vessel is on the navigable 
waters of the United States.
    (b) When the methane (LNG) fuel supply is shut down due to loss of 
ventilation or detection of gas, the master shall ensure that the 
methane (LNG) fuel supply is not used until the leak or other cause of 
the shutdown is found and corrected.
    (c) The master shall ensure that the required procedure under 
paragraph (b) of this section is posted in the main machinery space.
    (d) The master shall ensure that the oxygen concentration in the 
annular space of the fuel line under Sec.  154.706(a)(1) is 8% or less 
by volume before methane (LNG) vapors are admitted to the fuel line.



Sec.  154.1858  Cargo hose.

    The person in charge of cargo transfer shall ensure that cargo hose 
used for cargo transfer service meets Sec. Sec.  154.552 through 
154.562.



Sec.  154.1860  Integral tanks: Cargo colder than -10 [deg]C (14 [deg]F).

    The master shall ensure that an integral tank does not carry a cargo 
colder than -10 [deg]C (14 [deg]F) unless that carriage is specially 
approved by the Commandant (CG-OES).

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



Sec.  154.1862  Posting of speed reduction.

    If a speed reduction is specially approved by the Commandant under 
Sec.  154.409, the master shall ensure that the speed reduction is 
posted in the wheelhouse.



Sec.  154.1864  Vessel speed within speed reduction.

    The master shall ensure that the speed of the vessel is not greater 
than the posted speed reduction.



Sec.  154.1866  Cargo hose connection: Transferring cargo.

    No person may transfer cargo through a cargo hose connection unless 
the connection has the remotely controlled quick closing shut off valve 
required under Sec.  154.538.



Sec.  154.1868  Portable blowers in personnel access openings.

    The master shall ensure that a portable blower in a personnel access 
opening does not reduce the area of the opening so that it does not meet 
Sec.  154.340.

[[Page 347]]



Sec.  154.1870  Bow and stern loading.

    (a) When the bow or stern loading piping is not in use, the master 
shall lock closed the shut-off valves under Sec.  154.355(a)(4) or 
remove the spool piece under Sec.  154.355(a)(4).
    (b) The person in charge of cargo transfer shall ensure that after 
the bow or stern loading piping is used it is purged of cargo vapors 
with inert gas.
    (c) The person in charge of cargo transfer shall ensure that 
entrances, forced or natural ventilation intakes, exhausts, and other 
openings to any deck house alongside the bow or stern loading piping are 
closed when this piping is in use.
    (d) The person in charge of cargo transfer shall ensure that bow or 
stern loading piping installed in the area of the accommodation, 
service, or control space is not used for transfer of the following:
    (1) Acetaldehyde.
    (2) Ammonia, anhydrous.
    (3) Dimethylamine.
    (4) Ethylamine.
    (5) Ethyl Chloride.
    (6) Methyl Chloride.
    (7) Vinyl Chloride.



Sec.  154.1872  Cargo emergency jettisoning.

    (a) The master shall ensure that emergency jettisoning piping under 
Sec.  154.356, except bow and stern loading and discharging piping, is 
only used when an emergency exists.
    (b) Emergency jettisoning piping when being used may be outside of 
the transverse tank location under Sec.  154.310.
    (c) The master shall ensure that cargo is not jettisoned in a U.S. 
port.
    (d) When ethylene oxide is carried, the master shall ensure that the 
emergency jettisoning piping with associated pumps and fittings is on-
line and ready for use for an emergency.
    (e) The master shall lock closed the shut-off valves under Sec.  
154.356 when the emergency jettisoning piping is not in use.
    (f) The person in charge of cargo transfer shall ensure that after 
the emergency jettisoning piping is used it is purged of cargo vapors 
with inert gas.
    (g) The person in charge of cargo transfer shall ensure that 
entrances, forced or natural ventilation intakes, exhausts, and other 
openings to accommodation, service, or control spaces facing the 
emergency jettisoning piping area and alongside the emergency 
jettisoning piping are closed when this piping is in use.

                                                        Table 4--Summary of Minimum Requirements
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                       Electrical
         Cargo name \1\             Ship type    Independent tank  Control of cargo       Vapor        Gauging \3\    hazard class         Special
                                                  type C required  tank vapor space   detection \2\                   and group \4\      requirements
--------------------------------------------------------------------------------------------------------------------------------------------------------
Acetaldehyde....................  IIG/IIPG.....  ................  Inert...........  I & T.........  C.............  I-C...........  154.1410 (c),
                                                                                                                                      154.1410,
                                                                                                                                      154.1710,
                                                                                                                                      154.1720,
                                                                                                                                      154.1870.
Ammonia, anhydrous..............  IIG/IIPG.....  ................  ................  T.............  C.............  I-D...........  154.1000, 154.1400
                                                                                                                                      (c), 154.1405,
                                                                                                                                      154.1410, 154.1702
                                                                                                                                      (b), (c), (e),
                                                                                                                                      154.1760,
                                                                                                                                      154.1870.
Butadiene.......................  IIG/IIPG.....  ................  Inert...........  I.............  R.............  I-B...........  154.1702 (b), (d),
                                                                                                                                      (f), 154.1710,
                                                                                                                                      154.1750,
                                                                                                                                      154.1818.
Butane..........................  IIG/IIPG.....  ................  ................  I.............  R.............  I-D...........  None.
Butylene........................  IIG/IIPG.....  ................  ................  I.............  R.............  I-D...........  None.
Dimethylamine...................  IIG/IIPG.....  ................  ................  I & T.........  C.............  I-C...........  154.1400 (c),
                                                                                                                                      154.1405,
                                                                                                                                      154.1410, 154.1702
                                                                                                                                      (b), (c), (e),
                                                                                                                                      154.1870.
Ethane..........................  IIG..........  ................  ................  I.............  R.............  I-D...........  None.
Ethylamine......................  IIG/IIPG.....  ................  ................  I & T.........  C.............  I-C...........  154.1400 (c),
                                                                                                                                      154.1405,
                                                                                                                                      154.1410, 154.1702
                                                                                                                                      (b), (c), (e),
                                                                                                                                      154.1870.
Ethyl Chloride..................  IIG/IIPG.....  ................  ................  I & T.........  R.............  I-D...........  154.1870.
Ethylene........................  IIG..........  ................  ................  I.............  R.............  I-C...........  None.

[[Page 348]]

 
Ethylene oxide..................  IG...........  Yes.............  Inert...........  I & T.........  C.............  I-B...........  154.660 (b) (3),
                                                                                                                                      154.1400 (c),
                                                                                                                                      154.1405,
                                                                                                                                      154.1410, 154.1702
                                                                                                                                      (b), (d), (f),
                                                                                                                                      154.1705,
                                                                                                                                      154.1710,
                                                                                                                                      154.1720,
                                                                                                                                      154.1725,
                                                                                                                                      154.1730, 154.1870
                                                                                                                                      (a), (b).
Methane (LNG)...................  IIG..........  ................  ................  I.............  C.............  I-D...........  154.703 through
                                                                                                                                      154.709, 154.1854.
Methyl acetylene-propadiene       IIG/IIPG.....  ................  ................  I.............  R.............  I.............  154.1735.
 mixture.
Methyl bromide..................  IG...........  Yes.............  ................  I & T.........  C.............  I-D...........  154.660 (b) (3),
                                                                                                                                      154.1345 (c) (d),
                                                                                                                                      154.1400 (c),
                                                                                                                                      154.1405,
                                                                                                                                      154.1410, 154.1702
                                                                                                                                      (a), (d),
                                                                                                                                      154.1705,
                                                                                                                                      154.1720, 154.1870
                                                                                                                                      (a), (b).
Methyl chloride.................  IIG/IIPG.....  ................  ................  I & T.........  C.............  I-D...........  154.1702 (a),
                                                                                                                                      154.1870.
Nitrogen........................  IIIG.........  ................  ................  O.............  C.............  ..............  154.1755.
Propane.........................  IIG/IIPG.....  ................  ................  I.............  R.............  I-D...........  None.
Propylene.......................  IIG/IIPG.....  ................  ................  I.............  R.............  I-D...........  None.
Refrigerant.....................  IIIG.........  ................  ................  ..............  R.............  ..............  None.
Sulfur dioxide..................  IG...........  Yes.............  Dry.............  T.............  C.............  ..............  154.660 (b) (3),
                                                                                                                                      154.1345 (c), (d),
                                                                                                                                      154.1400 (c),
                                                                                                                                      154.1405,
                                                                                                                                      154.1410,
                                                                                                                                      154.1705,
                                                                                                                                      154.1715,
                                                                                                                                      154.1720, 154.1870
                                                                                                                                      (a), (b).
Vinyl chloride..................  IIG/IIPG.....  ................  ................  I & T.........  C.............  I-D...........  154.1405, 154.1410,
                                                                                                                                      154.1702 (a) (b)
                                                                                                                                      (d) (f), 154.1710,
                                                                                                                                      154.1740,
                                                                                                                                      154.1745,
                                                                                                                                      154.1750,
                                                                                                                                      154.1818, 154.1830
                                                                                                                                      (f), 154.1870.
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ Refrigerant gases include non-toxic, non-flammable gases such as: dichlorodifluoromethane, dichloromonofluoromethane, dichlorotetrafluoroethane,
  monochlorodifluoromethane, monochlorotetrafluoroethane, and monochlorotrifluoromethane.
\2\ As used in this column: ``I'' stands for flammable vapor detection; ``T'' stands for toxic vapor detection; ``O'' stands for oxygen detection; and
  see Sec.  Sec.   154.1345 thru 154.1360.
\3\ As used in this column: ``C'' stands for closed gauging; ``R'' stands for restricted gauging; and see Sec.   154.1300.
\4\ The designations used in this column are from the National Electrical Code.


[CGD 74-289, 44 FR 26009, May 3, 1979; 44 FR 59234, Oct. 15, 1979]



             Sec. Appendix A to Part 154--Equivalent Stress

    I. Equivalent stress ([sigma] c) is calculated by the following 
formula or another formula specially approved by the Commandant (CG-522) 
as equivalent to the following:
[GRAPHIC] [TIFF OMITTED] TC02FE91.090

where:

[sigma]x = total normal stress in ``x'' direction.
[sigma]y = total normal stress in ``y'' direction.
[tau]xy = total shear stress in ``xy'' plane.


[[Page 349]]


    II. When the static and dynamic stresses are calculated separately, 
the total stresses in paragraph I are calculated from the following 
formulae or another formulae specially approved by the Commandant (CG-
522) as equivalent to the following:
[GRAPHIC] [TIFF OMITTED] TC02FE91.091

[GRAPHIC] [TIFF OMITTED] TC02FE91.092

[GRAPHIC] [TIFF OMITTED] TC02FE91.093

    III. Each dynamic and static stress is determined from its 
acceleration component and its hull strain component from hull 
deflection and torsion.

[CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 
4782, Feb. 3, 1983]



        Sec. Appendix B to Part 154--Stress Analyses Definitions

    The following are the standard definitions of stresses for the 
analysis of an independent tank type B:
    Normal stress means the component of stress normal to the plane of 
reference.
    Membrane stress means the component of normal stress that is 
uniformly distributed and equal to the average value of the stress 
across the thickness of the section under consideration.
    Bending stress means the variable stress across the thickness of the 
section under consideration, after the subtraction of the membrane 
stress.
    Shear stress means the component of the stress acting in the plane 
of reference.
    Primary stress means the stress produced by the imposed loading that 
is necessary to balance the external forces and moments. (The basic 
characteristic of a primary stress is that it is not self-limiting. 
Primary stresses that considerably exceed the yield strength result in 
failure or at least in gross deformations.)
    Primary general membrane stress means the primary membrane stress 
that is so distributed in the structure that no redistribution of load 
occurs as a result of yielding.
    Primary local membrane stress means the resulting stress from both a 
membrane stress, caused by pressure or other mechanical loading, and a 
primary or a discontinuity effect that produces excessive distortion in 
the transfer of loads to other portions of the structure. (The resulting 
stress is a primary local membrane stress although it has some 
characteristics of a secondary stress.) A stress region is local if:
[GRAPHIC] [TIFF OMITTED] TC02FE91.094

[GRAPHIC] [TIFF OMITTED] TC02FE91.095

where:

S1 = distance in the meridional direction over which the 
          equivalent stress exceeds 1.1 f.
S2 = distance in the meridional direction to another region 
          where the limits for primary general membrane stress are 
          exceeded.
R = mean radius of the vessel.
t = wall thickness of the vessel at the location where the primary 
          general membrane stress limit is exceeded.
f = allowable primary general membrane stress.

    Secondary stress means a normal stress or shear stress caused by 
constraints of adjacent parts or by self-constraint of a structure. The 
basic characteristic of a secondary stress is that it is self-limiting. 
Local yielding and minor distortions can satisfy the conditions that 
cause the stress to occur.

                           PART 155 [RESERVED]



               SUBCHAPTER P_MANNING OF VESSELS [RESERVED]



[[Page 351]]



                              FINDING AIDS




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

  A list of CFR titles, subtitles, chapters, subchapters and parts and 
an alphabetical list 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.

  Table of CFR Titles and Chapters
  Alphabetical List of Agencies Appearing in the CFR
  List of CFR Sections Affected

[[Page 353]]



                    Table of CFR Titles and Chapters




                     (Revised as of October 1, 2020)

                      Title 1--General Provisions

         I  Administrative Committee of the Federal Register 
                (Parts 1--49)
        II  Office of the Federal Register (Parts 50--299)
       III  Administrative Conference of the United States (Parts 
                300--399)
        IV  Miscellaneous Agencies (Parts 400--599)
        VI  National Capital Planning Commission (Parts 600--699)

                    Title 2--Grants and Agreements

            Subtitle A--Office of Management and Budget Guidance 
                for Grants and Agreements
         I  Office of Management and Budget Governmentwide 
                Guidance for Grants and Agreements (Parts 2--199)
        II  Office of Management and Budget Guidance (Parts 200--
                299)
            Subtitle B--Federal Agency Regulations for Grants and 
                Agreements
       III  Department of Health and Human Services (Parts 300--
                399)
        IV  Department of Agriculture (Parts 400--499)
        VI  Department of State (Parts 600--699)
       VII  Agency for International Development (Parts 700--799)
      VIII  Department of Veterans Affairs (Parts 800--899)
        IX  Department of Energy (Parts 900--999)
         X  Department of the Treasury (Parts 1000--1099)
        XI  Department of Defense (Parts 1100--1199)
       XII  Department of Transportation (Parts 1200--1299)
      XIII  Department of Commerce (Parts 1300--1399)
       XIV  Department of the Interior (Parts 1400--1499)
        XV  Environmental Protection Agency (Parts 1500--1599)
     XVIII  National Aeronautics and Space Administration (Parts 
                1800--1899)
        XX  United States Nuclear Regulatory Commission (Parts 
                2000--2099)
      XXII  Corporation for National and Community Service (Parts 
                2200--2299)
     XXIII  Social Security Administration (Parts 2300--2399)
      XXIV  Department of Housing and Urban Development (Parts 
                2400--2499)
       XXV  National Science Foundation (Parts 2500--2599)
      XXVI  National Archives and Records Administration (Parts 
                2600--2699)

[[Page 354]]

     XXVII  Small Business Administration (Parts 2700--2799)
    XXVIII  Department of Justice (Parts 2800--2899)
      XXIX  Department of Labor (Parts 2900--2999)
       XXX  Department of Homeland Security (Parts 3000--3099)
      XXXI  Institute of Museum and Library Services (Parts 3100--
                3199)
     XXXII  National Endowment for the Arts (Parts 3200--3299)
    XXXIII  National Endowment for the Humanities (Parts 3300--
                3399)
     XXXIV  Department of Education (Parts 3400--3499)
      XXXV  Export-Import Bank of the United States (Parts 3500--
                3599)
     XXXVI  Office of National Drug Control Policy, Executive 
                Office of the President (Parts 3600--3699)
    XXXVII  Peace Corps (Parts 3700--3799)
     LVIII  Election Assistance Commission (Parts 5800--5899)
       LIX  Gulf Coast Ecosystem Restoration Council (Parts 5900--
                5999)

                        Title 3--The President

         I  Executive Office of the President (Parts 100--199)

                           Title 4--Accounts

         I  Government Accountability Office (Parts 1--199)

                   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  Office of Personnel Management and Office of the 
                Director of National Intelligence (Parts 1400--
                1499)
         V  The International Organizations Employees Loyalty 
                Board (Parts 1500--1599)
        VI  Federal Retirement Thrift Investment Board (Parts 
                1600--1699)
      VIII  Office of Special Counsel (Parts 1800--1899)
        IX  Appalachian Regional Commission (Parts 1900--1999)
        XI  Armed Forces Retirement Home (Parts 2100--2199)
       XIV  Federal Labor Relations Authority, General Counsel of 
                the Federal Labor Relations Authority and Federal 
                Service Impasses Panel (Parts 2400--2499)
       XVI  Office of Government Ethics (Parts 2600--2699)
       XXI  Department of the Treasury (Parts 3100--3199)
      XXII  Federal Deposit Insurance Corporation (Parts 3200--
                3299)
     XXIII  Department of Energy (Parts 3300--3399)
      XXIV  Federal Energy Regulatory Commission (Parts 3400--
                3499)
       XXV  Department of the Interior (Parts 3500--3599)
      XXVI  Department of Defense (Parts 3600--3699)

[[Page 355]]

    XXVIII  Department of Justice (Parts 3800--3899)
      XXIX  Federal Communications Commission (Parts 3900--3999)
       XXX  Farm Credit System Insurance Corporation (Parts 4000--
                4099)
      XXXI  Farm Credit Administration (Parts 4100--4199)
    XXXIII  U.S. International Development Finance Corporation 
                (Parts 4300--4399)
     XXXIV  Securities and Exchange Commission (Parts 4400--4499)
      XXXV  Office of Personnel Management (Parts 4500--4599)
     XXXVI  Department of Homeland Security (Parts 4600--4699)
    XXXVII  Federal Election Commission (Parts 4700--4799)
        XL  Interstate Commerce Commission (Parts 5000--5099)
       XLI  Commodity Futures Trading Commission (Parts 5100--
                5199)
      XLII  Department of Labor (Parts 5200--5299)
     XLIII  National Science Foundation (Parts 5300--5399)
       XLV  Department of Health and Human Services (Parts 5500--
                5599)
      XLVI  Postal Rate Commission (Parts 5600--5699)
     XLVII  Federal Trade Commission (Parts 5700--5799)
    XLVIII  Nuclear Regulatory Commission (Parts 5800--5899)
      XLIX  Federal Labor Relations Authority (Parts 5900--5999)
         L  Department of Transportation (Parts 6000--6099)
       LII  Export-Import Bank of the United States (Parts 6200--
                6299)
      LIII  Department of Education (Parts 6300--6399)
       LIV  Environmental Protection Agency (Parts 6400--6499)
        LV  National Endowment for the Arts (Parts 6500--6599)
       LVI  National Endowment for the Humanities (Parts 6600--
                6699)
      LVII  General Services Administration (Parts 6700--6799)
     LVIII  Board of Governors of the Federal Reserve System 
                (Parts 6800--6899)
       LIX  National Aeronautics and Space Administration (Parts 
                6900--6999)
        LX  United States Postal Service (Parts 7000--7099)
       LXI  National Labor Relations Board (Parts 7100--7199)
      LXII  Equal Employment Opportunity Commission (Parts 7200--
                7299)
     LXIII  Inter-American Foundation (Parts 7300--7399)
      LXIV  Merit Systems Protection Board (Parts 7400--7499)
       LXV  Department of Housing and Urban Development (Parts 
                7500--7599)
      LXVI  National Archives and Records Administration (Parts 
                7600--7699)
     LXVII  Institute of Museum and Library Services (Parts 7700--
                7799)
    LXVIII  Commission on Civil Rights (Parts 7800--7899)
      LXIX  Tennessee Valley Authority (Parts 7900--7999)
       LXX  Court Services and Offender Supervision Agency for the 
                District of Columbia (Parts 8000--8099)
      LXXI  Consumer Product Safety Commission (Parts 8100--8199)
    LXXIII  Department of Agriculture (Parts 8300--8399)

[[Page 356]]

     LXXIV  Federal Mine Safety and Health Review Commission 
                (Parts 8400--8499)
     LXXVI  Federal Retirement Thrift Investment Board (Parts 
                8600--8699)
    LXXVII  Office of Management and Budget (Parts 8700--8799)
      LXXX  Federal Housing Finance Agency (Parts 9000--9099)
   LXXXIII  Special Inspector General for Afghanistan 
                Reconstruction (Parts 9300--9399)
    LXXXIV  Bureau of Consumer Financial Protection (Parts 9400--
                9499)
    LXXXVI  National Credit Union Administration (Parts 9600--
                9699)
     XCVII  Department of Homeland Security Human Resources 
                Management System (Department of Homeland 
                Security--Office of Personnel Management) (Parts 
                9700--9799)
    XCVIII  Council of the Inspectors General on Integrity and 
                Efficiency (Parts 9800--9899)
      XCIX  Military Compensation and Retirement Modernization 
                Commission (Parts 9900--9999)
         C  National Council on Disability (Parts 10000--10049)
        CI  National Mediation Board (Part 10101)

                      Title 6--Domestic Security

         I  Department of Homeland Security, Office of the 
                Secretary (Parts 1--199)
         X  Privacy and Civil Liberties Oversight Board (Parts 
                1000--1099)

                         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 Nutrition 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)
      VIII  Agricultural Marketing Service (Federal Grain 
                Inspection Service, Fair Trade Practices Program), 
                Department of Agriculture (Parts 800--899)

[[Page 357]]

        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  [Reserved]
      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)
        XX  [Reserved]
       XXV  Office of Advocacy and Outreach, Department of 
                Agriculture (Parts 2500--2599)
      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 Policy and New Uses, Department of 
                Agriculture (Parts 2900--2999)
       XXX  Office of the Chief Financial Officer, Department of 
                Agriculture (Parts 3000--3099)
      XXXI  Office of Environmental Quality, Department of 
                Agriculture (Parts 3100--3199)
     XXXII  Office of Procurement and Property Management, 
                Department of Agriculture (Parts 3200--3299)
    XXXIII  Office of Transportation, Department of Agriculture 
                (Parts 3300--3399)
     XXXIV  National Institute of Food and Agriculture (Parts 
                3400--3499)
      XXXV  Rural Housing Service, Department of Agriculture 
                (Parts 3500--3599)
     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)
       XLI  [Reserved]
      XLII  Rural Business-Cooperative Service and Rural Utilities 
                Service, Department of Agriculture (Parts 4200--
                4299)

[[Page 358]]

         L  Rural Business-Cooperative Service, Rural Housing 
                Service, and Rural Utilities Service, Department 
                of Agriculture (Parts 5001--5099)

                    Title 8--Aliens and Nationality

         I  Department of Homeland Security (Parts 1--499)
         V  Executive Office for Immigration Review, Department of 
                Justice (Parts 1000--1399)

                 Title 9--Animals and Animal Products

         I  Animal and Plant Health Inspection Service, Department 
                of Agriculture (Parts 1--199)
        II  Agricultural Marketing Service (Federal Grain 
                Inspection Service, Fair Trade Practices Program), 
                Department of Agriculture (Parts 200--299)
       III  Food Safety and Inspection Service, Department of 
                Agriculture (Parts 300--599)

                           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)
      XIII  Nuclear Waste Technical Review Board (Parts 1300--
                1399)
      XVII  Defense Nuclear Facilities Safety Board (Parts 1700--
                1799)
     XVIII  Northeast Interstate Low-Level Radioactive Waste 
                Commission (Parts 1800--1899)

                      Title 11--Federal Elections

         I  Federal Election Commission (Parts 1--9099)
        II  Election Assistance Commission (Parts 9400--9499)

                      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  (Parts 500--599) [Reserved]
        VI  Farm Credit Administration (Parts 600--699)
       VII  National Credit Union Administration (Parts 700--799)
      VIII  Federal Financing Bank (Parts 800--899)
        IX  (Parts 900--999)[Reserved]

[[Page 359]]

         X  Bureau of Consumer Financial Protection (Parts 1000--
                1099)
        XI  Federal Financial Institutions Examination Council 
                (Parts 1100--1199)
       XII  Federal Housing Finance Agency (Parts 1200--1299)
      XIII  Financial Stability Oversight Council (Parts 1300--
                1399)
       XIV  Farm Credit System Insurance Corporation (Parts 1400--
                1499)
        XV  Department of the Treasury (Parts 1500--1599)
       XVI  Office of Financial Research (Parts 1600--1699)
      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)

               Title 13--Business Credit and Assistance

         I  Small Business Administration (Parts 1--199)
       III  Economic Development Administration, Department of 
                Commerce (Parts 300--399)
        IV  Emergency Steel Guarantee Loan Board (Parts 400--499)
         V  Emergency Oil and Gas Guaranteed Loan Board (Parts 
                500--599)

                    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--1199)
         V  National Aeronautics and Space Administration (Parts 
                1200--1299)
        VI  Air Transportation System Stabilization (Parts 1300--
                1399)

                 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 Industry and Security, Department of 
                Commerce (Parts 700--799)

[[Page 360]]

      VIII  Bureau of Economic Analysis, Department of Commerce 
                (Parts 800--899)
        IX  National Oceanic and Atmospheric Administration, 
                Department of Commerce (Parts 900--999)
        XI  National Technical Information Service, 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) [Reserved]

                    Title 16--Commercial Practices

         I  Federal Trade Commission (Parts 0--999)
        II  Consumer Product Safety Commission (Parts 1000--1799)

             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  U.S. Customs and Border Protection, Department of 
                Homeland Security; Department of the Treasury 
                (Parts 0--199)
        II  United States International Trade Commission (Parts 
                200--299)
       III  International Trade Administration, Department of 
                Commerce (Parts 300--399)
        IV  U.S. Immigration and Customs Enforcement, Department 
                of Homeland Security (Parts 400--599) [Reserved]

[[Page 361]]

                     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  Office of Workers' Compensation Programs, 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 Service, 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)
        II  Agency for International Development (Parts 200--299)
       III  Peace Corps (Parts 300--399)
        IV  International Joint Commission, United States and 
                Canada (Parts 400--499)
         V  Broadcasting Board of Governors (Parts 500--599)
       VII  Overseas Private Investment Corporation (Parts 700--
                799)
        IX  Foreign Service Grievance Board (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  Millennium Challenge Corporation (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)

[[Page 362]]

                          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)
        IV  Office of Housing and Office of Multifamily Housing 
                Assistance Restructuring, Department of Housing 
                and Urban Development (Parts 400--499)
         V  Office of Assistant Secretary for Community Planning 
                and Development, Department of Housing and Urban 
                Development (Parts 500--599)
        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, Section 202 Direct Loan Program, Section 
                202 Supportive Housing for the Elderly Program and 
                Section 811 Supportive Housing for Persons With 
                Disabilities Program) (Parts 800--899)
        IX  Office of Assistant Secretary for Public and Indian 
                Housing, Department of Housing and Urban 
                Development (Parts 900--1699)
       XII  Office of Inspector General, Department of Housing and 
                Urban Development (Parts 2000--2099)
        XV  Emergency Mortgage Insurance and Loan Programs, 
                Department of Housing and Urban Development (Parts 
                2700--2799) [Reserved]
        XX  Office of Assistant Secretary for Housing--Federal 
                Housing Commissioner, Department of Housing and 
                Urban Development (Parts 3200--3899)
      XXIV  Board of Directors of the HOPE for Homeowners Program 
                (Parts 4000--4099) [Reserved]
       XXV  Neighborhood Reinvestment Corporation (Parts 4100--
                4199)

[[Page 363]]

                           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--899)
         V  Bureau of Indian Affairs, Department of the Interior, 
                and Indian Health Service, Department of Health 
                and Human Services (Part 900--999)
        VI  Office of the Assistant Secretary, Indian Affairs, 
                Department of the Interior (Parts 1000--1199)
       VII  Office of the Special Trustee for American Indians, 
                Department of the Interior (Parts 1200--1299)

                      Title 26--Internal Revenue

         I  Internal Revenue Service, Department of the Treasury 
                (Parts 1--End)

           Title 27--Alcohol, Tobacco Products and Firearms

         I  Alcohol and Tobacco Tax and Trade Bureau, Department 
                of the Treasury (Parts 1--399)
        II  Bureau of Alcohol, Tobacco, Firearms, and Explosives, 
                Department of Justice (Parts 400--799)

                   Title 28--Judicial Administration

         I  Department of Justice (Parts 0--299)
       III  Federal Prison Industries, Inc., Department of Justice 
                (Parts 300--399)
         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)
      VIII  Court Services and Offender Supervision Agency for the 
                District of Columbia (Parts 800--899)
        IX  National Crime Prevention and Privacy Compact Council 
                (Parts 900--999)
        XI  Department of Justice and Department of State (Parts 
                1100--1199)

                            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)

[[Page 364]]

        II  Office of Labor-Management Standards, 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  Employee Benefits Security 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  Bureau of Safety and Environmental Enforcement, 
                Department of the Interior (Parts 200--299)
        IV  Geological Survey, Department of the Interior (Parts 
                400--499)
         V  Bureau of Ocean Energy Management, Department of the 
                Interior (Parts 500--599)
       VII  Office of Surface Mining Reclamation and Enforcement, 
                Department of the Interior (Parts 700--999)
       XII  Office of Natural Resources Revenue, Department of the 
                Interior (Parts 1200--1299)

                 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)
        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)

[[Page 365]]

      VIII  Office of Investment Security, Department of the 
                Treasury (Parts 800--899)
        IX  Federal Claims Collection Standards (Department of the 
                Treasury--Department of Justice) (Parts 900--999)
         X  Financial Crimes Enforcement Network, Department of 
                the Treasury (Parts 1000--1099)

                      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  Department of Defense, Defense Logistics Agency (Parts 
                1200--1299)
       XVI  Selective Service System (Parts 1600--1699)
      XVII  Office of the Director of National Intelligence (Parts 
                1700--1799)
     XVIII  National Counterintelligence Center (Parts 1800--1899)
       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)

               Title 33--Navigation and Navigable Waters

         I  Coast Guard, Department of Homeland Security (Parts 
                1--199)
        II  Corps of Engineers, Department of the Army, Department 
                of Defense (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 366]]

       III  Office of Special Education and Rehabilitative 
                Services, Department of Education (Parts 300--399)
        IV  Office of Career, Technical, and Adult Education, 
                Department of Education (Parts 400--499)
         V  Office of Bilingual Education and Minority Languages 
                Affairs, Department of Education (Parts 500--599) 
                [Reserved]
        VI  Office of Postsecondary Education, Department of 
                Education (Parts 600--699)
       VII  Office of Educational Research and Improvement, 
                Department of Education (Parts 700--799) 
                [Reserved]
            Subtitle C--Regulations Relating to Education
        XI  (Parts 1100--1199) [Reserved]
       XII  National Council on Disability (Parts 1200--1299)

                          Title 35 [Reserved]

             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)
        VI  [Reserved]
       VII  Library of Congress (Parts 700--799)
      VIII  Advisory Council on Historic Preservation (Parts 800--
                899)
        IX  Pennsylvania Avenue Development Corporation (Parts 
                900--999)
         X  Presidio Trust (Parts 1000--1099)
        XI  Architectural and Transportation Barriers Compliance 
                Board (Parts 1100--1199)
       XII  National Archives and Records Administration (Parts 
                1200--1299)
        XV  Oklahoma City National Memorial Trust (Parts 1500--
                1599)
       XVI  Morris K. Udall Scholarship and Excellence in National 
                Environmental Policy Foundation (Parts 1600--1699)

             Title 37--Patents, Trademarks, and Copyrights

         I  United States Patent and Trademark Office, Department 
                of Commerce (Parts 1--199)
        II  U.S. Copyright Office, Library of Congress (Parts 
                200--299)
       III  Copyright Royalty Board, Library of Congress (Parts 
                300--399)
        IV  National Institute of Standards and Technology, 
                Department of Commerce (Parts 400--599)

[[Page 367]]

           Title 38--Pensions, Bonuses, and Veterans' Relief

         I  Department of Veterans Affairs (Parts 0--199)
        II  Armed Forces Retirement Home (Parts 200--299)

                       Title 39--Postal Service

         I  United States Postal Service (Parts 1--999)
       III  Postal Regulatory Commission (Parts 3000--3099)

                  Title 40--Protection of Environment

         I  Environmental Protection Agency (Parts 1--1099)
        IV  Environmental Protection Agency and Department of 
                Justice (Parts 1400--1499)
         V  Council on Environmental Quality (Parts 1500--1599)
        VI  Chemical Safety and Hazard Investigation Board (Parts 
                1600--1699)
       VII  Environmental Protection Agency and Department of 
                Defense; Uniform National Discharge Standards for 
                Vessels of the Armed Forces (Parts 1700--1799)
      VIII  Gulf Coast Ecosystem Restoration Council (Parts 1800--
                1899)

          Title 41--Public Contracts and Property Management

            Subtitle A--Federal Procurement Regulations System 
                [Note]
            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 Service, Department of 
                Labor (Parts 61-1--61-999)
   62--100  [Reserved]
            Subtitle C--Federal Property Management Regulations 
                System
       101  Federal Property Management Regulations (Parts 101-1--
                101-99)
       102  Federal Management Regulation (Parts 102-1--102-299)
  103--104  [Reserved]
       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)
  129--200  [Reserved]
            Subtitle D--Other Provisions Relating to Property 
                Management [Reserved]

[[Page 368]]

            Subtitle E--Federal Information Resources Management 
                Regulations System [Reserved]
            Subtitle F--Federal Travel Regulation System
       300  General (Parts 300-1--300-99)
       301  Temporary Duty (TDY) 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 (Part 303-1--303-99)
       304  Payment of Travel Expenses from a Non-Federal Source 
                (Parts 304-1--304-99)

                        Title 42--Public Health

         I  Public Health Service, Department of Health and Human 
                Services (Parts 1--199)
   II--III  [Reserved]
        IV  Centers for Medicare & Medicaid Services, Department 
                of Health and Human Services (Parts 400--699)
         V  Office of Inspector General-Health Care, Department of 
                Health and Human Services (Parts 1000--1099)

                   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 400--999)
        II  Bureau of Land Management, Department of the Interior 
                (Parts 1000--9999)
       III  Utah Reclamation Mitigation and Conservation 
                Commission (Parts 10000--10099)

             Title 44--Emergency Management and Assistance

         I  Federal Emergency Management Agency, Department of 
                Homeland Security (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 
                (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)

[[Page 369]]

       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)
        IX  Denali Commission (Parts 900--999)
         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  Corporation for National and Community Service (Parts 
                1200--1299)
      XIII  Administration for Children and Families, 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 of Fine Arts (Parts 2100--2199)
     XXIII  Arctic Research Commission (Parts 2300--2399)
      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 Homeland Security (Parts 
                1--199)
        II  Maritime Administration, Department of Transportation 
                (Parts 200--399)
       III  Coast Guard (Great Lakes Pilotage), Department of 
                Homeland Security (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)

[[Page 370]]

        IV  National Telecommunications and Information 
                Administration, Department of Commerce, and 
                National Highway Traffic Safety Administration, 
                Department of Transportation (Parts 400--499)
         V  The First Responder Network Authority (Parts 500--599)

           Title 48--Federal Acquisition Regulations System

         1  Federal Acquisition Regulation (Parts 1--99)
         2  Defense Acquisition Regulations System, 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  Broadcasting Board of Governors (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)
        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)
        30  Department of Homeland Security, Homeland Security 
                Acquisition Regulation (HSAR) (Parts 3000--3099)
        34  Department of Education Acquisition Regulation (Parts 
                3400--3499)
        51  Department of the Army Acquisition Regulations (Parts 
                5100--5199) [Reserved]
        52  Department of the Navy Acquisition Regulations (Parts 
                5200--5299)
        53  Department of the Air Force Federal Acquisition 
                Regulation Supplement (Parts 5300--5399) 
                [Reserved]

[[Page 371]]

        54  Defense Logistics Agency, Department of Defense (Parts 
                5400--5499)
        57  African Development Foundation (Parts 5700--5799)
        61  Civilian Board of Contract Appeals, General Services 
                Administration (Parts 6100--6199)
        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  Pipeline and Hazardous Materials Safety 
                Administration, Department of Transportation 
                (Parts 100--199)
        II  Federal Railroad Administration, Department of 
                Transportation (Parts 200--299)
       III  Federal Motor Carrier Safety Administration, 
                Department of Transportation (Parts 300--399)
        IV  Coast Guard, Department of Homeland Security (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 (Parts 1000--1399)
        XI  Research and Innovative Technology Administration, 
                Department of Transportation (Parts 1400--1499) 
                [Reserved]
       XII  Transportation Security Administration, Department of 
                Homeland Security (Parts 1500--1699)

                   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 Fishing and Related Activities (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)

[[Page 372]]

        VI  Fishery Conservation and Management, National Oceanic 
                and Atmospheric Administration, Department of 
                Commerce (Parts 600--699)

[[Page 373]]





           Alphabetical List of Agencies Appearing in the CFR




                     (Revised as of October 1, 2020)

                                                  CFR Title, Subtitle or 
                     Agency                               Chapter

Administrative Conference of the United States    1, III
Advisory Council on Historic Preservation         36, VIII
Advocacy and Outreach, Office of                  7, XXV
Afghanistan Reconstruction, Special Inspector     5, LXXXIII
     General for
African Development Foundation                    22, XV
  Federal Acquisition Regulation                  48, 57
Agency for International Development              2, VII; 22, II
  Federal Acquisition Regulation                  48, 7
Agricultural Marketing Service                    7, I, VIII, IX, X, XI; 9, 
                                                  II
Agricultural Research Service                     7, V
Agriculture, Department of                        2, IV; 5, LXXIII
  Advocacy and Outreach, Office of                7, XXV
  Agricultural Marketing Service                  7, I, VIII, IX, X, XI; 9, 
                                                  II
  Agricultural Research Service                   7, V
  Animal and Plant Health Inspection Service      7, III; 9, I
  Chief Financial Officer, Office of              7, XXX
  Commodity Credit Corporation                    7, XIV
  Economic Research Service                       7, XXXVII
  Energy Policy and New Uses, Office of           2, IX; 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
  Food and Nutrition Service                      7, II
  Food Safety and Inspection Service              9, III
  Foreign Agricultural Service                    7, XV
  Forest Service                                  36, II
  Information Resources Management, Office of     7, XXVII
  Inspector General, Office of                    7, XXVI
  National Agricultural Library                   7, XLI
  National Agricultural Statistics Service        7, XXXVI
  National Institute of Food and Agriculture      7, XXXIV
  Natural Resources Conservation Service          7, VI
  Operations, Office of                           7, XXVIII
  Procurement and Property Management, Office of  7, XXXII
  Rural Business-Cooperative Service              7, XVIII, XLII
  Rural Development Administration                7, XLII
  Rural Housing Service                           7, XVIII, XXXV
  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 of                          32, VII
  Federal Acquisition Regulation Supplement       48, 53
Air Transportation Stabilization Board            14, VI
Alcohol and Tobacco Tax and Trade Bureau          27, I
Alcohol, Tobacco, Firearms, and Explosives,       27, II
     Bureau of
AMTRAK                                            49, VII
American Battle Monuments Commission              36, IV
American Indians, Office of the Special Trustee   25, VII
Animal and Plant Health Inspection Service        7, III; 9, I
Appalachian Regional Commission                   5, IX
Architectural and Transportation Barriers         36, XI
   Compliance Board
[[Page 374]]

Arctic Research Commission                        45, XXIII
Armed Forces Retirement Home                      5, XI; 38, II
Army, Department of                               32, V
  Engineers, Corps of                             33, II; 36, III
  Federal Acquisition Regulation                  48, 51
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
Broadcasting Board of Governors                   22, V
  Federal Acquisition Regulation                  48, 19
Career, Technical, and Adult Education, Office    34, IV
     of
Census Bureau                                     15, I
Centers for Medicare & Medicaid Services          42, IV
Central Intelligence Agency                       32, XIX
Chemical Safety and Hazard Investigation Board    40, VI
Chief Financial Officer, Office of                7, XXX
Child Support Enforcement, Office of              45, III
Children and Families, Administration for         45, II, III, IV, X, XIII
Civil Rights, Commission on                       5, LXVIII; 45, VII
Civil Rights, Office for                          34, I
Coast Guard                                       33, I; 46, I; 49, IV
Coast Guard (Great Lakes Pilotage)                46, III
Commerce, Department of                           2, XIII; 44, IV; 50, VI
  Census Bureau                                   15, I
  Economic Analysis, Bureau of                    15, VIII
  Economic Development Administration             13, III
  Emergency Management and Assistance             44, IV
  Federal Acquisition Regulation                  48, 13
  Foreign-Trade Zones Board                       15, IV
  Industry and Security, Bureau of                15, VII
  International Trade Administration              15, III; 19, III
  National Institute of Standards and Technology  15, II; 37, IV
  National Marine Fisheries Service               50, II, IV
  National Oceanic and Atmospheric                15, IX; 50, II, III, IV, 
       Administration                             VI
  National Technical Information Service          15, XI
  National Telecommunications and Information     15, XXIII; 47, III, IV
       Administration
  National Weather Service                        15, IX
  Patent and Trademark Office, United States      37, I
  Secretary of Commerce, Office of                15, Subtitle A
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 Financial Protection Bureau              5, LXXXIV; 12, X
Consumer Product Safety Commission                5, LXXI; 16, II
Copyright Royalty Board                           37, III
Corporation for National and Community Service    2, XXII; 45, XII, XXV
Cost Accounting Standards Board                   48, 99
Council on Environmental Quality                  40, V
Council of the Inspectors General on Integrity    5, XCVIII
     and Efficiency
Court Services and Offender Supervision Agency    5, LXX; 28, VIII
     for the District of Columbia
Customs and Border Protection                     19, I
Defense, Department of                            2, XI; 5, XXVI; 32, 
                                                  Subtitle A; 40, VII
  Advanced Research Projects Agency               32, I
  Air Force Department                            32, VII
  Army Department                                 32, V; 33, II; 36, III; 
                                                  48, 51
  Defense Acquisition Regulations System          48, 2
  Defense Intelligence Agency                     32, I

[[Page 375]]

  Defense Logistics Agency                        32, I, XII; 48, 54
  Engineers, Corps of                             33, II; 36, III
  National Imagery and Mapping Agency             32, I
  Navy, Department of                             32, VI; 48, 52
  Secretary of Defense, Office of                 2, XI; 32, I
Defense Contract Audit Agency                     32, I
Defense Intelligence Agency                       32, I
Defense Logistics Agency                          32, XII; 48, 54
Defense Nuclear Facilities Safety Board           10, XVII
Delaware River Basin Commission                   18, III
Denali Commission                                 45, IX
Disability, National Council on                   5, C; 34, XII
District of Columbia, Court Services and          5, LXX; 28, VIII
     Offender Supervision Agency for the
Drug Enforcement Administration                   21, II
East-West Foreign Trade Board                     15, XIII
Economic Analysis, Bureau of                      15, VIII
Economic Development Administration               13, III
Economic Research Service                         7, XXXVII
Education, Department of                          2, XXXIV; 5, LIII
  Bilingual Education and Minority Languages      34, V
       Affairs, Office of
  Career, Technical, and Adult Education, Office  34, IV
       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
Educational Research and Improvement, Office of   34, VII
Election Assistance Commission                    2, LVIII; 11, II
Elementary and Secondary Education, Office of     34, II
Emergency Oil and Gas Guaranteed Loan Board       13, V
Emergency Steel Guarantee Loan Board              13, IV
Employee Benefits Security Administration         29, XXV
Employees' Compensation Appeals Board             20, IV
Employees Loyalty Board                           5, V
Employment and Training Administration            20, V
Employment Policy, National Commission for        1, IV
Employment Standards Administration               20, VI
Endangered Species Committee                      50, IV
Energy, Department of                             2, IX; 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
Environmental Protection Agency                   2, XV; 5, LIV; 40, I, IV, 
                                                  VII
  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
  Environmental Quality, Council on               40, V
  Management and Budget, Office of                2, Subtitle A; 5, III, 
                                                  LXXVII; 14, VI; 48, 99
  National Drug Control Policy, Office of         2, XXXVI; 21, III
  National Security Council                       32, XXI; 47, II
  Presidential Documents                          3
  Science and Technology Policy, Office of        32, XXIV; 47, II
  Trade Representative, Office of the United      15, XX
       States
Export-Import Bank of the United States           2, XXXV; 5, LII; 12, IV

[[Page 376]]

Family Assistance, Office of                      45, II
Farm Credit Administration                        5, XXXI; 12, VI
Farm Credit System Insurance Corporation          5, XXX; 12, XIV
Farm Service Agency                               7, VII, XVIII
Federal Acquisition Regulation                    48, 1
Federal Aviation Administration                   14, I
  Commercial Space Transportation                 14, III
Federal Claims Collection Standards               31, IX
Federal Communications Commission                 5, XXIX; 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                       5, XXXVII; 11, I
Federal Emergency Management Agency               44, I
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
Federal Home Loan Mortgage Corporation            1, IV
Federal Housing Enterprise Oversight Office       12, XVII
Federal Housing Finance Agency                    5, LXXX; 12, XII
Federal Labor Relations Authority                 5, XIV, XLIX; 22, XIV
Federal Law Enforcement Training Center           31, VII
Federal Management Regulation                     41, 102
Federal Maritime Commission                       46, IV
Federal Mediation and Conciliation Service        29, XII
Federal Mine Safety and Health Review Commission  5, LXXIV; 29, XXVII
Federal Motor Carrier Safety Administration       49, III
Federal Prison Industries, Inc.                   28, III
Federal Procurement Policy Office                 48, 99
Federal Property Management Regulations           41, 101
Federal Railroad Administration                   49, II
Federal Register, Administrative Committee of     1, I
Federal Register, Office of                       1, II
Federal Reserve System                            12, II
  Board of Governors                              5, LVIII
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
Financial Crimes Enforcement Network              31, X
Financial Research Office                         12, XVI
Financial Stability Oversight Council             12, XIII
Fine Arts, Commission of                          45, XXI
Fiscal Service                                    31, II
Fish and Wildlife Service, United States          50, I, IV
Food and Drug Administration                      21, I
Food and Nutrition 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 Services Administration                   5, LVII; 41, 105
  Contract Appeals, Board of                      48, 61
  Federal Acquisition Regulation                  48, 5
  Federal Management Regulation                   41, 102
  Federal Property Management Regulations         41, 101
  Federal Travel Regulation System                41, Subtitle F

[[Page 377]]

  General                                         41, 300
  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
  Temporary Duty (TDY) Travel Allowances          41, 301
Geological Survey                                 30, IV
Government Accountability Office                  4, I
Government Ethics, Office of                      5, XVI
Government National Mortgage Association          24, III
Grain Inspection, Packers and Stockyards          7, VIII; 9, II
     Administration
Gulf Coast Ecosystem Restoration Council          2, LIX; 40, VIII
Harry S. Truman Scholarship Foundation            45, XVIII
Health and Human Services, Department of          2, III; 5, XLV; 45, 
                                                  Subtitle A
  Centers for Medicare & Medicaid Services        42, IV
  Child Support Enforcement, Office of            45, III
  Children and Families, Administration for       45, II, III, IV, X, XIII
  Community Services, Office of                   45, X
  Family Assistance, Office of                    45, II
  Federal Acquisition Regulation                  48, 3
  Food and Drug Administration                    21, I
  Indian Health Service                           25, V
  Inspector General (Health Care), Office of      42, V
  Public Health Service                           42, I
  Refugee Resettlement, Office of                 45, IV
Homeland Security, Department of                  2, XXX; 5, XXXVI; 6, I; 8, 
                                                  I
  Coast Guard                                     33, I; 46, I; 49, IV
  Coast Guard (Great Lakes Pilotage)              46, III
  Customs and Border Protection                   19, I
  Federal Emergency Management Agency             44, I
  Human Resources Management and Labor Relations  5, XCVII
       Systems
  Immigration and Customs Enforcement Bureau      19, IV
  Transportation Security Administration          49, XII
HOPE for Homeowners Program, Board of Directors   24, XXIV
     of
Housing, Office of, and Multifamily Housing       24, IV
     Assistance Restructuring, Office of
Housing and Urban Development, Department of      2, XXIV; 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
  Housing, Office of, and Multifamily Housing     24, IV
       Assistance Restructuring, Office of
  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
Housing, Office of, and Multifamily Housing       24, IV
     Assistance Restructuring, Office of
Immigration and Customs Enforcement Bureau        19, IV
Immigration Review, Executive Office for          8, V
Independent Counsel, Office of                    28, VII
Independent Counsel, Offices of                   28, VI
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
Industry and Security, Bureau of                  15, VII

[[Page 378]]

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, XV
Institute of Peace, United States                 22, XVII
Inter-American Foundation                         5, LXIII; 22, X
Interior, Department of                           2, XIV
  American Indians, Office of the Special         25, VII
       Trustee
  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
  Indian Arts and Crafts Board                    25, II
  Land Management, Bureau of                      43, II
  National Indian Gaming Commission               25, III
  National Park Service                           36, I
  Natural Resource Revenue, Office of             30, XII
  Ocean Energy Management, Bureau of              30, V
  Reclamation, Bureau of                          43, I
  Safety and Enforcement Bureau, Bureau of        30, II
  Secretary of the Interior, Office of            2, XIV; 43, Subtitle A
  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, United States Agency   22, II
     for
  Federal Acquisition Regulation                  48, 7
International Development Cooperation Agency,     22, XII
     United States
International Development Finance Corporation,    5, XXXIII; 22, VII
     U.S.
International Joint Commission, United States     22, IV
     and Canada
International Organizations Employees Loyalty     5, V
     Board
International Trade Administration                15, III; 19, III
International Trade Commission, United States     19, II
Interstate Commerce Commission                    5, XL
Investment Security, Office of                    31, VIII
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 of                            2, XXVIII; 5, XXVIII; 28, 
                                                  I, XI; 40, IV
  Alcohol, Tobacco, Firearms, and Explosives,     27, II
       Bureau of
  Drug Enforcement Administration                 21, II
  Federal Acquisition Regulation                  48, 28
  Federal Claims Collection Standards             31, IX
  Federal Prison Industries, Inc.                 28, III
  Foreign Claims Settlement Commission of the     45, V
       United States
  Immigration Review, Executive Office for        8, V
  Independent Counsel, Offices of                 28, VI
  Prisons, Bureau of                              28, V
  Property Management Regulations                 41, 128
Labor, Department of                              2, XXIX; 5, XLII
  Benefits Review Board                           20, VII
  Employee Benefits Security Administration       29, XXV
  Employees' Compensation Appeals Board           20, IV
  Employment Standards Administration             20, VI
  Employment and Training Administration          20, V
  Federal Acquisition Regulation                  48, 29
  Federal Contract Compliance Programs, Office    41, 60
       of
  Federal Procurement Regulations System          41, 50

[[Page 379]]

  Labor-Management Standards, Office of           29, II, IV
  Mine Safety and Health Administration           30, I
  Occupational Safety and Health Administration   29, XVII
  Public Contracts                                41, 50
  Secretary of Labor, Office of                   29, Subtitle A
  Veterans' Employment and Training Service,      41, 61; 20, IX
       Office of the Assistant Secretary for
  Wage and Hour Division                          29, V
  Workers' Compensation Programs, Office of       20, I, VII
Labor-Management Standards, Office of             29, II, IV
Land Management, Bureau of                        43, II
Legal Services Corporation                        45, XVI
Libraries and Information Science, National       45, XVII
     Commission on
Library of Congress                               36, VII
  Copyright Royalty Board                         37, III
  U.S. Copyright Office                           37, II
Management and Budget, Office of                  5, III, LXXVII; 14, VI; 
                                                  48, 99
Marine Mammal Commission                          50, V
Maritime Administration                           46, II
Merit Systems Protection Board                    5, II, LXIV
Micronesian Status Negotiations, Office for       32, XXVII
Military Compensation and Retirement              5, XCIX
     Modernization Commission
Millennium Challenge Corporation                  22, XIII
Mine Safety and Health Administration             30, I
Minority Business Development Agency              15, XIV
Miscellaneous Agencies                            1, IV
Monetary Offices                                  31, I
Morris K. Udall Scholarship and Excellence in     36, XVI
     National Environmental Policy Foundation
Museum and Library Services, Institute of         2, XXXI
National Aeronautics and Space Administration     2, XVIII; 5, LIX; 14, V
  Federal Acquisition Regulation                  48, 18
National Agricultural Library                     7, XLI
National Agricultural Statistics Service          7, XXXVI
National and Community Service, Corporation for   2, XXII; 45, XII, XXV
National Archives and Records Administration      2, XXVI; 5, LXVI; 36, XII
  Information Security Oversight Office           32, XX
National Capital Planning Commission              1, IV, VI
National Counterintelligence Center               32, XVIII
National Credit Union Administration              5, LXXXVI; 12, VII
National Crime Prevention and Privacy Compact     28, IX
     Council
National Drug Control Policy, Office of           2, XXXVI; 21, III
National Endowment for the Arts                   2, XXXII
National Endowment for the Humanities             2, XXXIII
National Foundation on the Arts and the           45, XI
     Humanities
National Geospatial-Intelligence Agency           32, I
National Highway Traffic Safety Administration    23, II, III; 47, VI; 49, V
National Imagery and Mapping Agency               32, I
National Indian Gaming Commission                 25, III
National Institute of Food and Agriculture        7, XXXIV
National Institute of Standards and Technology    15, II; 37, IV
National Intelligence, Office of Director of      5, IV; 32, XVII
National Labor Relations Board                    5, LXI; 29, I
National Marine Fisheries Service                 50, II, IV
National Mediation Board                          5, CI; 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                       2, XXV; 5, XLIII; 45, VI
  Federal Acquisition Regulation                  48, 25
National Security Council                         32, XXI
National Security Council and Office of Science   47, II
   and Technology Policy
[[Page 380]]

National Technical Information Service            15, XI
National Telecommunications and Information       15, XXIII; 47, III, IV, V
     Administration
National Transportation Safety Board              49, VIII
Natural Resource Revenue, Office of               30, XII
Natural Resources Conservation Service            7, VI
Navajo and Hopi Indian Relocation, Office of      25, IV
Navy, Department of                               32, VI
  Federal Acquisition Regulation                  48, 52
Neighborhood Reinvestment Corporation             24, XXV
Northeast Interstate Low-Level Radioactive Waste  10, XVIII
     Commission
Nuclear Regulatory Commission                     2, XX; 5, XLVIII; 10, I
  Federal Acquisition Regulation                  48, 20
Occupational Safety and Health Administration     29, XVII
Occupational Safety and Health Review Commission  29, XX
Ocean Energy Management, Bureau of                30, V
Oklahoma City National Memorial Trust             36, XV
Operations Office                                 7, XXVIII
Patent and Trademark Office, United States        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                                       2, XXXVII; 22, III
Pennsylvania Avenue Development Corporation       36, IX
Pension Benefit Guaranty Corporation              29, XL
Personnel Management, Office of                   5, I, IV, XXXV; 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
  Human Resources Management and Labor Relations  5, XCVII
       Systems, Department of Homeland Security
Pipeline and Hazardous Materials Safety           49, I
     Administration
Postal Regulatory 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 Documents                            3
Presidio Trust                                    36, X
Prisons, Bureau of                                28, V
Privacy and Civil Liberties Oversight Board       6, X
Procurement and Property Management, Office of    7, XXXII
Public and Indian Housing, Office of Assistant    24, IX
     Secretary for
Public Contracts, Department of Labor             41, 50
Public Health Service                             42, I
Railroad Retirement Board                         20, II
Reclamation, Bureau of                            43, I
Refugee Resettlement, Office of                   45, IV
Relocation Allowances                             41, 302
Research and Innovative Technology                49, XI
     Administration
Rural Business-Cooperative Service                7, XVIII, XLII
Rural Development Administration                  7, XLII
Rural Housing Service                             7, XVIII, XXXV
Rural Utilities Service                           7, XVII, XVIII, XLII
Safety and Environmental Enforcement, Bureau of   30, II
Saint Lawrence Seaway Development Corporation     33, IV
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                5, XXXIV; 17, II
Selective Service System                          32, XVI
Small Business Administration                     2, XXVII; 13, I
Smithsonian Institution                           36, V
Social Security Administration                    2, XXIII; 20, III; 48, 23
Soldiers' and Airmen's Home, United States        5, XI

[[Page 381]]

Special Counsel, Office of                        5, VIII
Special Education and Rehabilitative Services,    34, III
     Office of
State, Department of                              2, VI; 22, I; 28, XI
  Federal Acquisition Regulation                  48, 6
Surface Mining Reclamation and Enforcement,       30, VII
     Office of
Surface Transportation Board                      49, X
Susquehanna River Basin Commission                18, VIII
Tennessee Valley Authority                        5, LXIX; 18, XIII
Trade Representative, United States, Office of    15, XX
Transportation, Department of                     2, XII; 5, L
  Commercial Space Transportation                 14, III
  Emergency Management and Assistance             44, IV
  Federal Acquisition Regulation                  48, 12
  Federal Aviation Administration                 14, I
  Federal Highway Administration                  23, I, II
  Federal Motor Carrier Safety Administration     49, III
  Federal Railroad Administration                 49, II
  Federal Transit Administration                  49, VI
  Maritime Administration                         46, II
  National Highway Traffic Safety Administration  23, II, III; 47, IV; 49, V
  Pipeline and Hazardous Materials Safety         49, I
       Administration
  Saint Lawrence Seaway Development Corporation   33, IV
  Secretary of Transportation, Office of          14, II; 49, Subtitle A
  Transportation Statistics Bureau                49, XI
Transportation, Office of                         7, XXXIII
Transportation Security Administration            49, XII
Transportation Statistics Bureau                  49, XI
Travel Allowances, Temporary Duty (TDY)           41, 301
Treasury, Department of the                       2, X; 5, XXI; 12, XV; 17, 
                                                  IV; 31, IX
  Alcohol and Tobacco Tax and Trade Bureau        27, I
  Community Development Financial Institutions    12, XVIII
       Fund
  Comptroller of the Currency                     12, I
  Customs and Border Protection                   19, I
  Engraving and Printing, Bureau of               31, VI
  Federal Acquisition Regulation                  48, 10
  Federal Claims Collection Standards             31, IX
  Federal Law Enforcement Training Center         31, VII
  Financial Crimes Enforcement Network            31, X
  Fiscal Service                                  31, II
  Foreign Assets Control, Office of               31, V
  Internal Revenue Service                        26, I
  Investment Security, Office of                  31, VIII
  Monetary Offices                                31, I
  Secret Service                                  31, IV
  Secretary of the Treasury, Office of            31, Subtitle A
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
U.S. Copyright Office                             37, II
Utah Reclamation Mitigation and Conservation      43, III
     Commission
Veterans Affairs, Department of                   2, VIII; 38, I
  Federal Acquisition Regulation                  48, 8
Veterans' Employment and Training Service,        41, 61; 20, IX
     Office of the Assistant Secretary for
Vice President of the United States, Office of    32, XXVIII
Wage and Hour Division                            29, V
Water Resources Council                           18, VI
Workers' Compensation Programs, Office of         20, I, VII
World Agricultural Outlook Board                  7, XXXVIII

[[Page 383]]



List of CFR Sections Affected



All changes in this volume of the Code of Federal Regulations (CFR) that 
were made by documents published in the Federal Register since January 
1, 2015 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, parts and 
subparts as well as sections for revisions.
For changes to this volume of the CFR prior to this listing, consult the 
annual edition of the monthly List of CFR Sections Affected (LSA). The 
LSA is available at www.govinfo.gov. For changes to this volume of the 
CFR prior to 2001, see the ``List of CFR Sections Affected, 1949-1963, 
1964-1972, 1973-1985, and 1986-2000'' published in 11 separate volumes. 
The ``List of CFR Sections Affected 1986-2000'' is available at 
www.govinfo.gov.

                                  2015

46 CFR
                                                                   80 FR
                                                                    Page
Chapter I
148.11 (b) table amended............................................5336

                                  2016

46 CFR
                                                                   81 FR
                                                                    Page
Chapter I
136--144 (Subchapter M) Added......................................40101
    Regulation at 81 FR 40101 confirmed............................46848
143.300 (d) corrected..............................................47312
144.105 (c) corrected..............................................47312
144.135 (c) corrected..............................................47312
147.1 Heading and (d) revised......................................48272
147.7 (d), (e) and (f) redesignated as (e), (f) and (g) and 
        revised; new (d) added.....................................48272
147.65 Revised.....................................................48272

                                  2017

46 CFR
                                                                   82 FR
                                                                    Page
Chapter I
153.9 (b) introductory text amended................................35092
154.22 (a) introductory text amended...............................35092

                                2018	2019

                       (No regulations published)

                                  2020

  (Regulations published from January 1, 2020, through October 1, 2020)

46 CFR
                                                                   85 FR
                                                                    Page
Chapter I
150.120 Table heading amended......................................21674
150.130 (a) introductory text amended..............................21674
150.140 Heading revised............................................21674
150 Table I amended................................................21674
150 Table II amended...............................................21700
150 Appendix I amended.............................................21724
153 Table 2 amended................................................21728


                                  [all]