Safety Standards for Self-Propelled Vessels Carrying Bulk Liquefied Gases

DEPARTMENT OF TRANSPORTATION

Coast Guard

46 CFR Part 40 and 154

[CGD 82-058]

Safety Standards for Self-Propelled Vessels Carrying Bulk

Liquefied Gases

AGENCY: Coast Guard, DOT.

ACTION: Notice of proposed rulemaking.

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SUMMARY: The Coast Guard proposes to amend its regulations concerning

safety standards for self-propelled vessels carrying bulk liquefied

gases. These amendments are necessary because the International

Maritime Organization (IMO) Code on which many of these regulations are

based has been amended. This proposal would make the changes necessary

to align these regulations with the IMO Code and to clarify certain

provisions in the existing regulations.

DATES: Comments must be received on or before August 5, 1994.

ADDRESSES: Comments may be mailed to the Executive Secretary, Marine

Safety Council, (G-LRA/3406) (CGD 82-058), U.S. Coast Guard

Headquarters, 2100 Second Street SW., Washington, DC 20593-0001, or may

be delivered to room 3406 at the same address between 8 a.m. and 3

p.m., Monday through Friday, except Federal holidays. The telephone

number is (202) 267-1477. Comments on collection-of-information

requirements must be mailed also to the Office of Information and

Regulatory Affairs, Office of Management and Budget, 725 17th Street

NW., Washington, DC 20503, ATTN: Desk Officer, U.S. Coast Guard.

The Executive Secretary maintains the public docket for this

rulemaking. Comments will become part of this docket and will be

available for inspection or copying at room 3406, U.S. Coast Guard

Headquarters between 8 a.m., Monday through Friday, except Federal

holidays.

A copy of the material listed in ``Incorporation by Reference'' of

this preamble is available for inspection at room 1218, U.S. Coast

Guard Headquarters.

FOR FURTHER INFORMATION CONTACT: Mr. Thomas J. Felleisen, Hazardous

Materials Branch, Office of Marine Safety, Security and Environmental

Protection, (202) 267-1217.

SUPPLEMENTARY INFORMATION:

Requests for Comments

The Coast Guard encourages interested persons to participate in

this rulemaking by submitting written data, views, or arguments.

Persons submitting comments should include their names and addresses,

identify this rulemaking (CGD 82-058) and the specific section of this

proposal to which each comment applies, and give the reason for each

comment. The Coast Guard requests that two copies of all comments and

attachments be submitted in an unbound format, no larger than 8\1/2\ by

11 inches, suitable for copying and electronic filing. Persons wanting

acknowledgement of receipt of comments should enclose a stamped, self-

addressed postcard or envelope.

The Coast Guard will consider all comments received during the

comment period. It may change this proposal in view of the comments.

The Coast Guard plan no public hearing. Persons may request a

public hearing by writing to the Marine Safety Council at the address

under ADDRESSES. The request should include reasons why a hearing would

be beneficial. If it determines that the opportunity for oral

presentations will aid this rulemaking, the Coat Guard will hold a

public hearing at a time and place announced by a later notice in the

Federal Register.

Dafting Information

The principal persons involved in drafting this document are Mr.

Thomas J. Felleisen, Project Manager, and Mr. Stephen H. Barber,

Project Counsel, Office of Chief Counsel.

Background and Purpose

On November 12, 1975, the Inter-Governmental Maritime Consultative

Organization (now the International Maritime Organization or IMO)

adopted the ``Code for Construction and Equipment of Ships Carring

Liquefied Gases in Bulk'' (Gas Carrier Code), Resolution, A.328 (IX)

without amendments. Coast Guard regulations based on this code were put

into effect May 3, 1979 (44 25986), Since 1975, the Gas Carrier Code

has been amended four times: April 19, 1978 (see Maritime Safety

Committee (MSC) XXXVIII/22), May 8, 1979 (see MSC XL/26), May 20, 1980

(see MSC/Cir. 284), and June 14, 1983 (see MSC/Cir. 356).

IMO's amendments to the Gas Carrier Code include corrections and

clarifications, incorporation of standards for new or novel containment

systems, improvement of the carriage requirements for several of the

more hazardous cargoes, expansion of the list of chemicals to which the

code applies, and revisions to align the Gas Carrier Code with the

``International Code for the Construction and Equipment of Ships

Carrying Dangerous Chemicals in Bulk'' (IBC) and the ``International

Code for the Construction and Equipment of Ships Carrying Liquefield

Gases in Bulk'' (IGC).

These amendments were developed by the IMO Subcommittee on Bulk

Chemicals, the body responsible for maintenance of the Code. The Coast

Guard actively participated in the development of these changes to the

Gas Carrier Code by submitting position papers when the amendments were

proposed. This rulemaking would revise the Coast Guard regulations in

46 CFR part 154 to reflect these amendments.

One of the most notable revisions would be the inclusion of

standards for internal insulation tanks in new Secs. 154.454 through

154.458, as well as in several existing sections. These standards would

be included in order to bring the U.S. regulations for liquefied gas

vessels in line with the Gas Carrier Code.

Part 154 would be revised to include carriage requirements for

seven cargoes previously regulated only under 46 CFR part 153. The

cargoes are diethly ether, a mixture of ethylene oxide and propylene

oxide containing not more than 30% ethylene oxide, isoprene,

isopropylamine, monoethyamine, propylene oxide, vinyl ethyl ether, and

vinylidene chloride. These cargoes are being added in order to bring

the U.S. regulations for liquefied gas vessels in line with the Gas

Carrier Code.

Several sections of part 154 would be revised to clarify

misinterpreted provisions. These are in Secs. 154.630, 154.901,

154.1831, 154.1832, and 154.1834. See ``Section-by-Section Discussion

of Proposed Changes'' for the details of each clarification.

Section-by-Section Discussion of Proposed Changes

The following is a section by section explanation of the proposed

changes.

1. 46 CFR part 40 would be removed. See the discussion in this

section of the preamble on Sec. 154.1745.

2. Existing Sec. 154.1, Incorporation by reference, would be moved

to new Sec. 154.8 and revised to conform to current formatting

practices.

3. The following sections would be revised to include requirements

from the amended Gas Carrier Code applicable to internal insulation

tanks: Secs. 154.7, 154.235, 154.350, 154.454 through 154.459, 154.468,

154.615, and 154.902.

4. The following sections would be revised to update references to

other sections of this chapter and to incorporated material and to

correct spelling errors: Secs. 154.12, 154.15, 154.151, 154.174,

154.176, 154.188, 154.195, 154.420, 154.439, 154.440, 154.448, 154.471,

154,1005, 154.1020, 154.1115, 154.1135, 154.1735, 154.1800, 154.1803,

and 154.1820.

5. Section 154.19 would be revised to refer to the International

Code for the Construction and Equipment of Ships Carrying Liquefied

Gases in Bulk and to correct the date on the Gas Carrier Code for

Existing Ships. The correct date is 1976.

6. Section 154.170 would be revised in accordance with an amendment

to the Gas Carrier Code which sets the design temperature of the

primary and secondary cargo tank barriers. Also, paragraph (a) would be

revised to comply with present procedures for incorporating material by

reference.

7. Table 1 (Sec. 154.172) would be revised to align it with the Gas

Carrier Code by including higher tensile steel grades AH, DH, and EH

for vessels designed for prolonged exposure to low service

temperatures. The revisions to this table also would allow the use of

grade A steel for design temperatures of down to -5 deg.C for

thicknesses of up to 15mm. The reference in the table to an American

Bureau of Shipping (ABS) standard would be updated.

8. Section 154.300 would be revised to allow category A machinery

spaces, for example spaces for bow thruster machinery, to be located

forward of hold spaces if specially approved by the Commandant (G-MTH).

9. Section 154.315 would be revised to allow the Coast Guard to

accept arrangements where the cargo pump room or cargo compressor room

is located outside of the cargo area, as ``cargo area'' is defined in

Sec. 154.7, if the limits of the cargo area are extended to include the

cargo pump or compressor room and the areas below those spaces. The

Coast Guard has accepted these arrangements in the past, but only on a

case by case basis. In granting those acceptances, the Coast Guard used

the same criteria that is contained in the amendments to the Gas

Carrier Code which this notice proposes to adopt. Proposed Sec. 154.315

continues to exceed the Gas Carrier Code in that the Gas Carrier Code

allows cargo pump and compressor rooms to be located below the weather

deck. The Coast Guard takes the position that locating the cargo pump

and cargo compressor rooms on the weather deck reduces the likelihood

of permitting vapor accumulation in those rooms. Of course, such

arrangements would be considered under the provisions of Sec. 154.32 on

equivalents. This is consistent with the amendments to the Gas Carrier

Code which require special approval for specified locations of the

cargo pump and cargo compressor rooms.

Section 154.315 also would be revised to require that personnel

wearing protective clothing have complete access to cargo pump and

compressor rooms and are able to operate all valves necessary for cargo

handling.

10. Section 154.320 would be revised to align it with the Gas

Carrier Code by specifying allowable openings for cargo control

stations not having access to accommodation, service, or control

spaces.

11. Section 154.330 would be revised to align it with the Gas

Carrier Code by allowing less stringent requirements for openings to

accommodation, service, or control spaces on vessels dedicated to

cargoes which are neither toxic nor flammable.

12. Section 154.340 would be revised to clarify what is considered

to be an acceptable access to gas-dangerous spaces, such as duct keels

and ballast compartments, and also to clarify that entry into fuel oil

tanks must not be necessary in order to perform inspections of the

inner hull in the cargo area. These revisions correspond to amendments

made to the Gas Carrier Code.

13. Section 154.345 would be revised to make it clear when airlocks

are required. The proposal also would prohibit essential electrical

equipment which is non-explosion proof from being in a space protected

by an airlock. This is necessary because non-explosion proof electrical

equipment in such a space must be automatically deenergized upon

pressure loss in the space.

14. Section 154.350 would be revised, as was the Gas Carrier Code,

to waive the requirement for liquid leak detection for certain spaces

in internal insulation cargo containment systems, provided that those

spaces are completely filled with approved insulation.

15. Section 154.407 would be revised to designate the liquid height

as ``ZB'' and to clarify that the definition of ZB does not

include small tank domes which are not considered part of the accepted

total volume of the cargo tank. This amendment is consistent with the

Gas Carrier Code.

16. As discussed earlier, Secs. 154.454 through 154.458 would be

added to address the use of internal insulation tanks, as allowed by

the amended Gas Carrier Code. The design of each of these tanks would

be required to be approved by the Coast Guard.

17. As stated earlier, table 3 in Sec. 154.459 would be revised to

include requirements for internal insulation tanks.

18. Under Sec. 154.468, information on certain properties of the

insulation material used in internal insulation tanks would be required

to be submitted to the Coast Guard for approval. These properties were

added to the list of insulation properties required to be tested for

internal insulation tanks under the Gas Carrier Code.

19. Section 154.519 would be revised to clarify that any cargo

piping component capable of being isolated in the liquid full condition

must be fitted with a relief valve.

20. Section 154.522 would be revised in accordance with the amended

Gas Carrier Code to allow relaxations approved by the Commandant (G-

MTH) of the minimum design temperature of open ended piping inside

cargo tanks.

21. The table in Sec. 154.610 would be revised to raise the

required test temperature for material in the thickness range of 30 to

40mm from -40 deg.C to -20 deg.C, in accordance with the amended Gas

Carrier Code.

22. Section 154.630 would be revised to clarify that the minimum

yield strength used in the specified calculations must be the yield

strength of the aluminum alloy in the annealed condition. This section

currently makes reference only to the minimum tensile strength.

23. Section 154.901 would be revised to clearly state that the

cargo tank atmosphere is never permitted to be in the flammable range.

It is necessary to prevent a flammable atmosphere from developing on a

liquefied gas vessel because there are no requirements prohibiting

sources of ignition from being present. These vessels are designed and

operated based on the assumption that a flammable atmosphere will never

be present.

24. Section 154.1110 would be revised to include storerooms

containing high fire risk items in the area to be protected by the

water spray system and to clarify that each area listed is required to

be covered by at least two jets of water. These amendments are in line

with the amended Gas Carrier Code.

25. Section 154.1115 would be revised to include guidance for

determining the required capacity of the water spray systems. This

revision is based on amendments to the Gas Carrier Code.

26. Section 154.1320 would be revised to indicate that the pressure

referred to is the design vapor pressure and not the MARVS. This was

also clarified in the amendments to the Gas Carrier Code.

27. New Sec. 154.1327 would provide a formula for determining the

maximum acceptable shutdown time once the emergency shutdown valve is

activated. This maximum would represent the time until the tank becomes

liquid full. This is consistent with amendments to the Gas Carrier

Code.

28. Section 154.1343 would be added to require the installation of

detectors, as required in the amended Gas Carrier Code, for determining

when a leak has occurred in the primary barrier. The detectors need

only indicate that there is a leak. They need not be able to pinpoint

that leak.

29. Existing Sec. 154.1400 would be revised and Secs. 154.1401 and

154.1402 added to clearly indicate the required safety equipment for

all vessels and the additional equipment required for vessels carrying

flammable and toxic cargoes. These revisions correspond to amendments

to the Gas Carrier Code.

30. Section 154.1405 would be revised, as was the Gas Carrier Code,

to clearly indicate that respiratory and eye protection equipment

intended for use as emergency escape equipment be so marked and never

be used for fire fighting or cargo handling. This section also would

prohibit the use of filter-type respiratory equipment.

31. Section 154.1705 would be updated to include requirements for

cargoes added to bring these regulations in line with the Gas Carrier

Code.

32. Section 154.1718 would be added to require that cargo spaces

with submerged electric cargo pumps be inerted when any of the sever

high vapor pressure cargoes are carried. This is required by the

amended Gas Carrier Code.

33. Section 154.1720 would be updated to include the new cargoes

for which indirect refrigeration is required. This is based on

amendments to the Gas Carrier Code.

34. Sections 154.1721 through 154.1724 would be added to include

requirements for separate piping systems for toxic products, flame

screens on vent outlets, cargo tank quantity limitations, and vapor

return connections. These requirements are based on the amended Gas

Carrier Code.

35. Section 154.1745 would be revised to include all of the

requirements from 46 CFR part 40 for vinyl chloride transfer

operations. Existing Sec. 154.1745 references part 40, but there is no

reason to have part 40's requirements contained in a separate part. As

part 50 addresses only vinyl chloride, this proposal would remove all

of part 40 and transfer its requirements to part 154.

36. Section 154.1760 would be revised to address the problem of

stress corrosion cracking as it is addressed in the Gas Carrier Code.

37. Section 154.1765 would be added to set forth the requirements

for the carriage of diethyl ether and vinyl ethyl ether in accordance

with the amended Gas Carrier Code.

38. New Secs. 154.1770 and 154.1775 would be added to set forth the

requirements for the carriage of propylene oxide and mixtures of

ethylene oxide and propylene oxide which contain no more than 30%

ethylene oxide by weight. These requirements are consistent with the

amended Gas Carrier Code.

39. Section 154.1818 would be revised to add new products to the

list of products which may be carried if the shipper certifies that

they are inhibited. This revision is in accordance with the amended Gas

Carrier Code.

40. Section 154.1831 would be revised to list the qualifications of

the person in charge of cargo transfer operations. Section 155.710 of

33 CFR, as referenced in proposed paragraph (a), was amended by a

separate Coast Guard rulemaking (CGD 86-034; ``Hazardous Materials

Pollution Prevention'') applying Sec. 155.710 to hazardous materials

transfers as well as to oil transfers.

41. Section 154.1832 would be added to clarify the necessary

separation of cargo containment systems for incompatible cargoes. This

section is being proposed to ensure that incompatible cargoes are not

allowed to come in contact with each other on the vessel.

42. Section 154.1834 would be revised to clarify the

responsibilities of the person in charge of cargo transfer operations

to ensure that the proper piping is used and to ensure that cargo

vapors are properly handled.

43. Section 154.1850 would be revised to focus attention on the

special problems caused by the gas absorbing qualities of internal

insulation materials. This is in accordance with the amended Gas

Carrier Code.

44. Section 154.1870 would be revised to update the list of cargoes

which are prohibited from being transferred via bow or stern loading

piping. This revision is based on the amendments to the Gas Carrier

Code.

45. Section 154.7 and the table 4 following existing Sec. 154.1872

would be revised to include the minimum requirements for the new

cargoes added in accordance with the amended Gas Carrier Code and to

update existing requirements and references.

Incorporation by Reference

The following material would be incorporated by reference in

Sec. 154.8:

American Bureau of Shipping (ABS) Rules for Building and Classing Steel

Vessels, 1992.

American National Standards Institute (ANSI) Z87.1-1989 Practice for

Occupational and Educational Eye and Face Protection, 1989.

ANSI Z89.1-1986 Protective Headwear for Workers, 1986.

American Society for Testing and Materials (ASTM) A 20/A 20M-92a

Standard Specifications for General Requirements for Steel Plates for

Pressure Vessels, 1992.

ASTM F1017-92 Standard Specification for Flashlights on Vessels, 1992.

International Maritime Organization (IMO) Code for the Construction and

Equipment of Ships Carrying Liquefied Gases in Bulk, 1975, as amended

(1983 edition).

IMO Code for Existing Ships Carrying Liquefied Gases in Bulk, 1976.

IMO International Code for the Construction and Equipment of Ships

Carrying Liquefied Gases in Bulk, 1983.

IMO Medical First Aid Guide for Use in Accidents Involving Dangerous

Goods.

IMO Resolution A.328, Code for the Construction and Equipment of Ships

Carrying Liquefied Gases in Bulk, 1975.

Underwriters Laboratories, Inc. (UL) No. 783, Standard for Electric

Flashlights and Lanterns for Use in Hazardous (Classified) Locations,

1993.

Copies of the material are available for inspection where indicated

under ADDRESSES. Copies of the material are available from the sources

listed in Sec. 154.8.

Before publishing a final, the Coast Guard will submit this

material to the Director of the Federal Register for approval of the

incorporation by reference.

Regulatory Evaluation

This proposal is not a significant regulatory action under section

3(f) of Executive Order 12866 and does not require an assessment of

potential costs and benefits under section 6(a)(3) of that order. It

has not been reviewed by the Office of Management and Budget. It is not

significant under the Department of Transportation (DOT) regulatory

policies and procedures (44 FR 11040; February 26, 1979). The Coast

Guard expects the economic impact of this proposal to be so minimal

that a full Regulatory Evaluation under paragraphs 10e of the DOT

regulatory policies and procedures is unnecessary.

These proposed regulations would apply only to ``new gas vessels'',

as the term is defined in Sec. 154.7. No currently operating ``new gas

vessels'' would be affected. There are presently no U.S. flag ``new gas

vessels'', and currently operating foreign ``new gas vessels'' already

meet the similar requirements of the Gas Carrier Code.

The impact of this proposal on U.S. flag vessels constructed in the

future is also anticipated to be minimal, because the major part of

this proposal allows for the carriage of cargoes previously required to

be carried on chemical tankers and for the addition of an alternative,

less expensive, cargo containment system.

As stated above, the impact on foreign flag vessels built in the

future will continue to be minimal because these vessels will already

comply with the requirements of the Gas Carrier Code.

Small Entities

Under the Regulatory Flexibility Act (5 U.S.C. 501 et seq.), the

Coast Guard must consider whether this proposal, if adopted, will have

a significant economic impact on a substantial number of small

entities. ``Small entities'' may include (1) small businesses and not-

for-profit organizations that are independently owned and operated and

are not dominant in their fields and (2) governmental jurisdictions

with populations of less than 50,000.

These proposals would apply only to liquefied gas vessels, all of

which are large in size and owned by large corporations.

Therefore, the Coast Guard certifies under 5 U.S.C. 605(b) that

this proposal, if adopted, will not have a significant economic impact

on a substantial number of small entities. If, however, you think that

your business or organization qualifies as a small entity and that this

proposal will have a significant economic impact on your business or

organization, please submit a comment (see ADDRESSES) explaining why

you think it qualifies and in what way and to what degree this proposal

will economically affect it.

Collection of Information

Under the Paperwork Reduction Act (44 U.S.C. 3501 et seq.), the

Office of Management and Budget (OMB) reviews each proposed rule that

contains a collection-of-information requirement to determine whether

the practical value of the information is worth the burden imposed by

its collection. Collection-of-information requirements include

reporting, recordkeeping, notification, and other, similar

requirements.

This proposal contains collection-of-information requirements in

the following section: Sec. 154.15. The following particulars apply:

DOT No: 2115.

OMB Control No: 2115-0113.

Administration: U.S. Coast Guard.

Title: Safety Standards for Self-Propelled Vessels Carrying Bulk

Liquefied Gases.

Need for Information: To prevent the uncontrolled release of cargo by

liquefied gas carriers.

Proposed Use of Information: To verify compliance with safety

regulations.

Frequency of Response: 1 per respondent per year.

Burden Estimate: 10 hours per year.

Respondents: Designers of cargo containment systems; eight worldwide

Form(s): No specific forms. Information supplied from existing plans

and drawings used for designing a cargo containment system.

Average Burden Per Respondent: 10 hours per year.

The Coast Guard has submitted the requirements to OMB for review

under section 3504(h) of the Paperwork Reduction Act. Persons

submitting comments on the requirements should submit their comments

both to OMB and to the Coast Guard where indicated under ADDRESSES.

Federalism

The Coast Guard has analyzed this proposal under the principles and

criteria contain in Executive Order 12612 and has determined that this

proposal does not have sufficient federalism implications to warrant

the preparation of a Federalism Assessment.

Environment

The Coast Guard considered the environmental impact of this

proposal and concluded that, under paragraph 2.B.2 of Commandant

Instruction M16475.1B, this proposal is categorically excluded from

further environmental documentation. There is no environmental impact

associated with these expanded safety requirements. A ``Categorical

Exclusion Determination'' is available in the docket for inspection or

copying where indicated under ADDRESSES.

List of Subjects

46 CFR Part 40

Cargo vessels, Hazardous materials transportation, Marine safety,

Occupational safety and health, Seamen, Vinyl chloride.

46 CFR Part 154

Cargo vessels, Gases, Hazardous materials transportation, Marine

safety, Reporting and recordkeeping requirements.

For the reasons set out in the preamble, the Coast Guard proposes

to amend 46 CFR parts 40, and 154 as follows:

PART 40--[REMOVED AND RESERVED]

1. Part 40 is removed and reserved.

PART 154--SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK

LIQUEFIED GASES

2. The authority citation for part 154 continues to read as

follows:

Authority: 46 U.S.C. 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980

Comp., p. 277; 49 CFR 1.46.

Sec. 154.1 [Removed]

3. Section 154.1, Incorporation by reference, is removed.

4. In Sec. 154.7, revise the section heading, and the introductory

text and paragraph (a) of the definition for ``Gas-dangerous space'';

remove from the list under the definitions of ``Flammable cargoes'' and

``Toxic cargoes'' the word ``Ethylamine''; add, in alphabetical order,

to the list under ``Flammable cargoes'', the cargoes ``Diethyl ether'',

``Propylene oxide-ethylene oxide mixture'', ``Isoprene'',

``Isopropylamine'', ``Monoethylamine'', ``Propylene oxide'', ``Vinyl

ethyl ether'', and ``Vinylidene chloride''; add, in alphabetical order,

to the list under ``Toxic cargoes'', the cargoes ``Diethyl ether'',

``Propylene oxide-ethylene oxide mixture'', ``Isopropylamine'',

``Monoethylamine'', ``Propylene oxide'', ``Vinyl ethyl ether'', and

``Vinylidene chloride''; and add definitions for the words ``Boil-off

gas'', ``Category A machinery space'', ``Internal insulation tank'',

``Membrane'', and ``Oil fuel unit'' to read as follows:

Sec. 154.7 Definitions and abbreviations.

* * * * *

Boil-off gas means the vapor produced by cargo evaporation at

ambient temperatures of 45 deg.C still air and 32 deg.C still water.

* * * * *

Category A machinery space means Category A machinery space as

defined in Sec. 30.10-6a of this chapter.

* * * * *

Gas-dangerous space means a space where gas may be present and

includes the following spaces:

(a) A space in the cargo area which is not arranged or equipped in

a manner to ensure that the space's atmosphere is maintained at all

times in a gas safe condition.

* * * * *

Internal insulation tank means a non-self supporting cargo tank

consisting of thermal insulation materials which contribute to cargo

containment and which are supported by the structure of the adjacent

inner hull or of an independent tank.

* * * * *

Membrane means a non-self supporting metallic, nonmetallic or

composite material that is liquid tight and no thicker than 10 mm

(0.394 in).

* * * * *

Oil fuel unit means a unit as defined in Sec. 30.10-48a of this

chapter.

* * * * *

5. Section 154.8 is added to read as follows:

Sec. 154.8 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 paragraph (b) of this section, the Coast Guard must

publish notice of change in the Federal Register, and the material must

be available to the public. All approved material is available for

inspection at the Office of the Federal Register, 800 North Capitol

Street NW., suite 700, Washington, DC, and at U.S. Coast Guard, Marine

Technical and Hazardous Materials Division, room 1218, 2100 Second

Street SW., Washington, DC 20593-0001, and is available from the

sources indicated in paragraph (b) of this section.

(b) The material approved for incorporation by reference in this

part and the sections affected are as follows:

American Bureau of Shipping (ABS):

Two World Trade Center, 106th Floor, New York, NY 10048. Rules for

Building and Classing

Steel Vessels, 1992................................................ 154.170; 154.172; 154.174; 154.176;

154.188; 154.195; 154.420; 154.421;

154.439; 154.440.

American National Standards Institute (ANSI):

1430 Broadway, New York, NY 10018.

ANSI Z87.1-1989, Practice for Occupational and Educational Eye and 154.1400; 154.1401; 154.1402.

Face Protection, 1989.

ANSI Z89.1-86, Protective Headwear for Workers, 1986............... 154.1400; 154.1401; 154.1402.

American Society for Testing and Materials (ASTM):

1916 Race Street, Philadelphia, PA 19103.

A 20/A 20M-92a, Standard Specification for General Requirements for 154.610.

Steel Plates for Pressure Vessels, 1992.

ASTM F 1014-92, Standard Specification for Flashlights on Vessels, 154.1400.

1992.

International Maritime Organization:

4 Albert Embankment, London SE1 75R, U.K.

Code for the Construction and Equipment of Ships Carrying Liquefied 154.19.

Gases in Bulk, 1975, as amended (1983 edition).

Code for Existing Ships Carrying Liquefied Gases in Bulk, 1976..... 154.19; 154.24.

International Code for the Construction and Equipment of Ships 154.19.

Carrying Liquefied Gases in Bulk, 1983.

Medical First Aid Guide for Use in Accidents Involving Dangerous 154.1435; 154.1440.

Goods.

Resolution A. 328, Code for the Construction and Equipment of Ships 154.24.

Carrying Liquefied Gases in Bulk, 1975.

Underwriters Laboratories, Inc.:

333 Pfingsten Rd., Northbrook, IL 60062.

UL No. 783 Standard for Electric Flashlights and Lanterns for Use 154.1400; 154.1401; 154.1402.

in Hazardous (Classified) Locations, 1993.

6. In Sec. 154.12, paragraphs (e)(2), (4), (7), and (26) are

revised to read as follows:

Sec. 154.12 Existing gas vessel: Endorsements and requirements.

* * * * *

(e) * * *

(2) Section 154.320 (b) and (d).

* * * * *

(4) Section 154.340(e).

* * * * *

(7) Section 154.519(b)(2).

* * * * *

(26) Sections 154.1110 through 154.1130, except Secs. 154.1115(c),

154.1120(b), and 154.1125 (c) and (f).

* * * * *

7. In Sec. 154.15, paragraph (b)(1) is revised to read as follows:

Sec. 154.15 U.S. flag vessel; Endorsement application.

* * * * *

(b) * * *

(1) Calculations for hull design required by part 172, subpart G,

of this chapter;

* * * * *

8. In Sec. 154.19, paragraph (a) is revised to read as follows:

Sec. 154.19 U.S. flag vessel: IMO certificate issuance.

(a) 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 the vessel meets the requirements of this part and--

(1) For a gas vessel the construction of which began on or after

July 1, 1986, meets the International Code for the Construction and

Equipment of Ships Carrying Liquefied Gases in Bulk;

(2) For a gas vessel contracted for construction on or after

October 31, 1976 and constructed before July 1, 1986, meets the Code

for the Construction and Equipment of Ships Carrying Liquefied Gases in

Bulk, 1975, as amended (1983 edition); or

(3) For a gas vessel constructed before October 31, 1976, meets the

Code for Existing Ships Carrying Liquefied Gases in Bulk.

* * * * *

Subpart B [Amended]

9. The heading to subpart B is revised to read ``Subpart B--

Inspections''.

Sec. 154.151 [Amended]

10. In Sec. 154.151(c) introductory text, remove ``Sec. 154.5(b)''

and add, in its place, ``Sec. 154.22(b)''.

11. In Sec. 154.170, in paragraph (a), remove the words after

``material standards'' and add, in their place, the words ``in Rules

for Building and Classing Steel Vessels''; and revise paragraphs

(b)(3)(ii) and (b)(3)(iii) to read as follows:

Sec. 154.170 Outer hull steel plating.

* * * * *

(b) * * *

(3) * * *

(ii) For cargo containment systems with secondary barriers, the

temperature of the secondary barrier is the cargo boiling temperature

at atmospheric pressure; and

(iii) For cargo containment systems without secondary barriers, the

temperature of the primary barrier is the cargo carriage temperature.

12. Following Sec. 154.172, by revising table 1 to read as follows:

Sec. 154.172 Contiguous steel hull structure.

* * * * *

Table 1.--Minimum Temperature, Thickness, and Steel Grades in Contiguous

Hull Structures

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

Minimum Maximum thickness (mm) for steel grades

temperature ( -------------------------------------------------------

deg.C) A B D 3 AH DH EH

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

0 and above .... ``Rules for Building and Classing Steel Vessels''

-5 and below -0. 15 25 30 50 25 45 50

-10 and below -5 X 20 25 50 20 40 50

-20 and below -

10............. X X 20 50 X 30 50

-30 and below -

20............. X X X 40 X 20 40

Below -30 ...... In accordance with Sec. 154.615 of this part

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

``X'' means steel grade is not used.

Secs. 154.174, 154.176, 154.188, and 154.195 [Amended]

13. In Secs. 154.174(a), 154.176(a), 154.188, and 154.195(b),

remove the words ``of the American Bureau of Shipping published in

``Rules for Building and Classing Steel Vessels '', 1981'' and add, in

their place, the words ``in Rules for Building and Classing Steel

Vessels''.

14. In Sec. 154.235, redesignate paragraph (d) as paragraph (e) and

add a new paragraph (d) to read as follows:

Sec. 154.235 Cargo tank location.

* * * * *

(d) In vessels having internal insulation tanks, the extent of

damage must be measured to the supporting tank plating.

* * * * *

15. In Sec. 154.300, redesignate the introductory text and

paragraphs (a), (b), and (c) as paragraphs (a), (a)(1), (a)(2), and

(a)(3), respectively, and add a new paragraph (b) to read as follows:

Sec. 154.300 Segregation of hold spaces from other spaces.

* * * * *

(b) Hold spaces must be located forward of Category A machinery

spaces, unless specially approved by the Commandant (G-MTH).

16. In Sec. 154.315, revise paragraph (a); redesignate paragraph

(b) as paragraph (f); and add new paragraphs (b), (c), (d), (e), (g),

and (h) to read as follows:

Sec. 154.315 Cargo pump and cargo compressor rooms.

(a) Cargo pump rooms and cargo compressor rooms must be located

above the weather deck.

(b) Cargo pump rooms and cargo compressor rooms must be located

between the after end of the aftermost hold space and the forward end

of the forwardmost hold space, unless otherwise permitted by the

Commandant (G-MTH).

(c) When cargo compressor rooms are permitted under paragraph (b)

of this section to be located at the after end of the aftermost hold

space or at the forward end of the forwardmost hold space, the limits

of the cargo area must be extended to include the cargo pump rooms and

the cargo compressor rooms for the full beam and depth of the ship.

(d) Where the limits of the cargo area are extended under paragraph

(c) of this section, the bulkhead which separates the cargo pump rooms

or cargo compressor rooms from accommodation, service, or control

spaces or Category A machinery spaces must be located so as to prevent

gas from entering these spaces through a single failure of a bulkhead.

(e) For the purposes of fire protection, cargo compressor rooms are

treated as cargo pump rooms.

(f) * * *

(g) Cargo pump rooms and cargo compressor rooms must be arranged to

allow unrestricted access by personnel wearing protective clothing and,

in the event of injury, to allow unconscious personnel to be removed.

(h) All valves necessary for cargo handling must be readily

accessible to personnel wearing protective clothing.

17. In Sec. 154.320, redesignate paragraph (c) as paragraph (d) and

add a new paragraph (c) to read as follows:

Sec. 154.320 Cargo control stations.

* * * * *

(c) If a cargo control station has no access to an accommodation,

service or control space, the openings from the cargo area must comply

with Sec. 154.345.

* * * * *

18. In Sec. 154.330, paragraph (g) is added to read as follows:

Sec. 154.330 Openings to accommodation, service, or control spaces.

* * * * *

(g) Vessels dedicated to cargoes which are neither toxic nor

flammable may have openings to accommodation, service, or control

spaces which do not meet the requirements of paragraphs (a) through (f)

of this section, if specially approved by the Commandant (G-MTH).

19. In Sec. 154.340, revise the introductory text of paragraph (b);

redesignate paragraphs (c), (d), (e), and (f), as paragraphs (d), (e),

(f), and (g), respectively; revise redesignated paragraph (f); and add

a new paragraph (c) to read as follows:

Sec. 154.340 Access to tanks and spaces in the cargo area.

* * * * *

(b) Each access into or through a void space or other gas-dangerous

space in the cargo area, except for spaces separated by a single

gastight boundary from a hold or a space with a secondary barrier, must

-- * * *.

(c) Spaces separated by a single gastight boundary from a hold or a

space with a secondary barrier must be provided with either a direct

access from the weather deck or an indirect access from the weather

deck which does not include an enclosed gas-safe space.

* * * * *

(f) 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. If a visual inspection is possible only at the

outer face of the inner hull, the inner hull must not be a fuel oil

tank boundary wall.

* * * * *

20. In Sec. 154.345, revise paragraph (a) and add paragraph (d) to

read as follows:

Sec. 154.345 Air locks.

(a) Access through doors, gas tight or otherwise, is not permitted

from a gas-safe space to a gas-dangerous space; except that, access to

service spaces forward of the cargo area through air locks, under this

section, which open on the weatherdeck, may be permitted when

accommodation spaces are aft.

* * * * *

(d) Emergency fire pumps and non-explosion proof electrical

equipment for maneuvering, anchoring, or mooring the vessel must not be

located in spaces protected by air locks.

21. In Sec. 154.350, revise the section heading; redesignate

paragraph (d) as paragraph (e); add new paragraphs (d) and (f); and

revise redesignated paragraph (e) to read as follows:

Sec. 154.350 Bilge, ballast, and fuel oil systems in the cargo area.

* * * * *

(d) For internal insulation tanks, paragraphs (a), (b), and (c) of

this section do not apply to the following spaces, provided that the

spaces are completely filled with insulation approved under

Sec. 154.467:

(1) Interbarrier spaces.

(2) Spaces between the secondary barrier and the inner hull.

(3) Spaces between the secondary barrier and independent tank

structures.

(e) 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. Pump vents must not be open to machinery spaces.

(f) Duct keels may be connected to pumps in the machinery space

if--

(1) The connections are led directly to the pumps;

(2) The discharge from the pumps is led directly overboard; and

(3) There are no valves or manifolds in either line which could

connect the line from the duct keel to lines serving gas-safe spaces.

22. In Sec. 154.407(a), remove ``Z8'' wherever it appears and

add, in its place, ``ZB'' and revise the definition of ``ZB''

to read as follows:

Sec. 154.407 Cargo tank internal pressure head.

(a) * * *

``ZB'' = largest liquid height (m) above the point where the

pressure is to be determined in the direction (see figure 2).

Small tank domes not considered to be part of the accepted total volume

of the cargo tank need not be considered when determining ``ZB'';

* * * * *

Secs. 154.420 and 154.439 [Amended]

23. In Sec. 154.420(a) and Sec. 154.439 introductory text, remove

the words ``of the American Bureau of Shipping published in ``Rules for

Building and Classing Steel Vessels'', 1981'' and add, in their place,

the words ``in Rules for Building and Classing Steel Vessels.''

Sec. 154.421 [Amended]

24. In Sec. 154.421, remove ``, 1981''.

25. In 154.440, paragraph (c) is revised to read as follows:

Sec. 154.440 Allowable stress.

* * * * *

(c) For an internal pressure head that meets Sec. 154.439(a), tank

plating must meet the deep tank standards in Rules for Building and

Classing Steel Vessels.

Sec. 154.448 [Amended]

26. In Sec. 154.448(b), remove the word ``its'' before the word

``support''.

27. Before the undesignated heading ``SECONDARY BARRIER'', add a

new undesignated heading and Secs. 154.454 through 154.458 to read as

follows:

Internal Insulation Tanks

Sec. 154.454 General.

(a) The design of an internal insulation tank and its supporting

hull structure or independent tank structure must be specially approved

by the Commandant (G-MTH).

(b) Internal insulation tanks must be made of materials that

withstand the combined strains calculated under Sec. 154.457(a).

Sec. 154.455 Design vapor pressure.

The design vapor pressure (P deg.) of an internal insulation tank

must not exceed 25.4 kPa gauge (3.55 psig). For internal insulation

tanks supported by the hull structure, the Commandant (G-MTH) may

specially approve a P deg. between 24.5 kPa gauge (3.55 psig) and 69

kPa gauge (10 psig). For internal insulation tanks supported by

independent tank structures, the Commandant (G-MTH) may specifically

approve a P deg. greater than 69 kPa gauge (10 psig).

Sec. 154.456 Internal insulation tank system design.

An internal insulation tank must be designed for the following:

(a) Any static and dynamic loads with respect to--

(1) Fatigue failure;

(2) Crack propagation from both free and supported surfaces;

(3) Adhesive and cohesive strength;

(4) Compressive, tensile, and sheer strength; and

(5) Water ballast in spaces adjacent to the inner hull forming the

supporting structure of the internal insulation tank.

(b) Combined strains from static, dynamic, and thermal loads.

(c) Compatibility of the tank insulation material with the

deflections of the vessel's inner hull or independent tank structures.

Sec. 154.457 Calculations.

The tank design load calculations for an internal insulation tank

must include the following:

(a) The combined strains from static, dynamic, and thermal loads.

(b) The response of the internal insulation tank, its cargo, its

supporting structures, and any ballast adjacent to the supporting

structure of the internal insulation tank to the vessel motion and

acceleration under worst weather conditions. Calculations for a similar

vessel may be submitted to meet the requirements of this paragraph.

(c) Plastic deformation and fatigue life resulting from static and

dynamic loads in the insulation and in the supporting hull structure or

independent tank structure.

Sec. 154.458 Model test.

(a) A test must be performed to determine whether the primary and

secondary barriers of an internal insulation tank, including corners,

joints, pump mounts, piping penetrations, and other critical areas, are

capable of withstanding the combined strains from the static, dynamic,

and thermal loads calculated under Sec. 154.457(a).

(b) Combined tension and fatigue tests must be performed to

evaluate crack behavior of the insulation material in the event a

through crack develops in the inner hull or independent tank structure.

(c) Analyzed data from the tests under paragraphs (a) and (b) of

this section must be submitted to the Commandant (G-MTH) for

acceptance.

28. In Sec. 154.459, add a new entry and new footnotes to table 3

to read as follows:

Sec. 154.459 General.

* * * * *

Table 3.--Secondary Barriers for Tanks

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

Cargo temperature (T) at atmospheric pressure

Tank type -----------------------------------------------------------------------------------------------------------------------------

T-10 deg.C(14 deg.F) T-55 deg.C(-67 deg.F) T 20 mm (0.788 in.)...................... 0 deg.C (32

deg.F)

20 40 mm (1.576 in.)................. -20 deg.C (-4

deg.F)

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

34. In Sec. 154.615, designate the text as paragraph (a) and add a

new paragraph (b) to read as follows:

Sec. 154.615 Design temperature below 0 deg.C (32 deg.F) and down to

-55 deg.C (-67 deg.F).

* * * * *

(b) Insulation materials forming a secondary barrier must be

approved under Sec. 154.468.

35. In Sec. 154.630, paragraph (b) is revised to read as follows:

Sec. 154.630 Cargo tank material.

* * * * *

(b) For aluminum alloy cargo tanks with welded connections, the

minimum yield strength (Y) and the minimum tensile

strength (B) for the calculations under Secs. 154.440,

154.447, and 154.450 must be the minimum respective value of the alloy

in an annealed condition.

* * * * *

36. In Sec. 154.901(c), add a sentence at the end of the paragraph

to read as follows:

Sec. 154.901 Atmospheric control within cargo tanks and cargo piping

systems.

* * * * *

(c) * * *. No flammable mixture is permitted at any time within the

cargo tank.

* * * * *

37. In Sec. 154.902, paragraph (e) is added to read as follows:

Sec. 154.902 Atmospheric control within hold and interbarrier spaces.

* * * * *

(e) For internal insulation tanks, atmospheric control is not

required for interbarrier spaces and spaces between the secondary

barrier and the inner hull or independent tank structures which are

completely filled with insulation approved under Sec. 154.468

38. In Sec. 154.1005, paragraphs (c) and (d) are revised to read as

follows:

Sec. 154.1005 Equipment approval.

* * * * *

(c) Electrical equipment that is required to be intrinsically safe

under Sec. 154.1010 must comply with Sec. 111.105-11 of this chapter.

(d) Electrical equipment that is required to be explosion proof

under Sec. 154.1010 must comply with Sec. 111.105-9 of this chapter.

Sec. 154.1020 [Amended]

39. In Sec. 154.1020, remove ``Sec. 154.230(a)'' and add, in its

place ``Sec. 154.200''.

40. In Sec. 154.1110, redesignate the introductory text and

paragraphs (a) through (h) as paragraphs (a) and (a)(1) through (a)(8),

respectively; revise redesignated paragraphs (a)(6) and (a)(7); and add

paragraphs (b) and (c) to read as follows:

Sec. 154.1110 Areas protected by system.

(a) * * *

(6) Each boundary facing the cargo area of each superstructure that

contains storerooms containing high fire risk items or accommodation,

service, or control spaces;

(7) Each boundary facing the cargo area of each deckhouse that

contains storerooms containing high fire risk items or accommodation,

service, or control spaces; and

* * * * *

(b) Every area under paragraph (a) of this section also must be

covered by at least two jets of water from the fire main system.

(c) Boundaries of unmanned forecastle structures not containing

high fire risk items or equipment do not require water spray protection

41. In Sec. 154.1115, redesignate paragraph (b) as paragraph (c);

add a new paragraph (b); and revise redesignated paragraph (c) to read

as follows:

Sec. 154.1115 Discharge.

* * * * *

(b) For structures not having clearly defined horizontal or

vertical surfaces, the capacity of the water spray system must be

determined by the greater of the following;

(1) The projected horizontal surface multiplied by 10,000 cm\3\/

m\2\/min (0.25 gpm/ft.\2\).

(2) The actual surface multiplied by 4,000 cm\3\/m\2\/min (0.10

gpm/ft.\2\).

(c) The water spray protection under Sec. 154.1110 (a)(4) and

(a)(5) 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

must cover the area of the drip tray, whichever is greater.

42. In Sec. 154.1135, paragraphs (d)(1) and (d)(2) are revised to

read as follows:

Sec. 154.1135 Pumps.

* * * * *

(d) * * *

(1) The areas in Secs. 154.1110 (a)(6) through (a)(8) and

154.1115(c); and

(2) The largest section that includes the required protection under

Sec. 154.1110(a)(1), (a)(2), and (a)(3).

43. In Sec. 154.1320, paragraph (a)(1) is revised to read as

follows:

Sec. 154.1320 Sighting ports, tubular gauge glasses, and flat plate

type gauge glasses.

(a) * * *

(1) The tank has a design vapor pressure that is less than 69 kPa

gauge (10 psig);

* * * * *

44. Section 154.1327 is added to read as follows:

Sec. 154.1327 Valve closing time.

(a) The closing time (i.e. the time from shutdown signal initiation

to complete valve closure) of valves under Sec. 154.1325 must not be

greater than--

TP06JN94.000

U=ullage volume at operating signal level m\3\.

LR=maximum loading rate agreed on m\3\/h.

(b) The loading rate must be adjusted to limit the surge pressure

on valve closure to an acceptable level.

45. Section 154.1343 is added to read as follows:

Sec. 154.1343 Leak detection.

(a) All cargo containment systems requiring a secondary barrier

must be provided with permanently installed instrumentation to detect--

(1) Failure of the primary barrier to be liquid tight at any

location; or

(2) Contact of liquid cargo with the secondary barrier at any

location.

(b) The instrumentation required in paragraph (a) of this section

must be the appropriate gas detection equipment under Sec. 154.1345 and

need not be capable of detecting the exact location of the leak.

46. Section 154.1400 is revised to read as follows:

Sec. 154.1400 Safety equipment; All vessels.

(a) Instead of the equipment under Sec. 35.30-20 of this chapter,

each vessel must have two fireman's outfits and two sets of personnel

safety equipment on board.

(b) Each fireman's outfit must consist of the following:

(1) A pressure-demand, open circuit, self-contained breathing

apparatus approved by the Mining Safety and Health Administration

(MSHA) and by the National Institute for Occupational Safety and Health

(NIOSH), and having at a minimum a 30 minute air supply and a full

facepiece.

(2) A steel-cored lifeline.

(3) A three-cell, explosion proof flashlight manufactured to UL No.

783-79 with an Underwriters' Laboratories label for Class I, Division

1, and the Electrical Hazard Group listed in table 4 of this part for

each cargo carried.

(4) A fire axe.

(5) A helmet that meets ANSI Z89.1-86.

(6) A set of boots and gloves that are made of rubber or other

electrically non-conductive material.

(7) A set of goggles that meets ANSI Z87.179.

(8) An outfit that protects the skin from scalding steam and the

heat of fire and that has a water resistant outer surface.

(c) Each set of personnel safety equipment must consist of the

following:

(1) A pressure-demand, open circuit, self-contained breathing

apparatus approved by the Mining Safety and Health Administration

(MSHA) and by the National Institute for Occupational Safety and Health

(NIOSH), and having at a minimum a 30 minute air supply and a full

facepiece.

(2) A steel-cored lifeline.

(3) A three-cell, explosion proof flashlight manufactured to UL No.

783-79 with an Underwriters' Laboratories label for Class I, Division

1, and the Electrical Hazard Group listed in table 4 of this part for

each cargo carried.

(4) A helmet that meets ANSI Z89.1-86.

(5) A set of boots and gloves that are made of rubber or other

electrically non-conductive material.

(6) A set of goggles that meets ANSI Z87.179.

(7) A chemically protective outfit that protects the wearer from

the particular personnel hazards presented by the cargo vapor.

(d) Each vessel must have a spare air supply consisting of at least

one of the following:

(1) One fully-charged air cylinder unit for each self-contained

breathing apparatus required under paragraph (b) or (c) of this

section, each air cylinder unit having at least a thirty minute supply

of air with--

(i) An air compressor capable of supplying high pressure air of the

proper purity for recharging the cylinders; and

(ii) A charging manifold capable of recharging two air cylinder

units simultaneously.

(2) Ten fully-charged air cylinder units, each with at least a

thirty minute supply of air.

(3) A low pressure-supplied air line system with--

(i) Hose connections compatible with the self-contained breathing

apparatus;

(ii) Sufficient high pressure air capacity to supply, through

pressure reduction devices, low pressure air to two persons for at

least one hour; and

(iii) An air compressor capable of supplying high pressure air of

the purity for recharging the self-contained breathing apparatus and

all fixed air bottles, if any.

47. Section 154.1401 is added to as follows:

Sec. 154.1401 Safety equipment: Vessels carrying flammable cargoes.

(a) Each vessel that has a cargo capacity of from 2,000 m\3\

through 5,000 m\3\ and that is carrying a cargo designated with an

``I'' or ``I&T'' in the ``Vapor detection'' column of table 4 of this

part must have the safety equipment required under Sec. 154.1400 and

two additional fireman's outfits as described in Sec. 154.1400(b).

(b) Each vessel that has a cargo capacity of 5,000 m\3\ or more and

that is carrying a cargo designated with an ``I'' or ``I&T'' in the

``Vapor detection'' column of table 4 this part must have the safety

equipment required under Sec. 154.1400 and three additional fireman's

outfits as described in Sec. 154.1400(b).

48. Section 154.1402 is added to read as follows:

Sec. 154.1402 Safety equipment: Vessels carrying toxic cargoes.

(a) Each vessel that has a cargo capacity of greater than 2,000

m\3\ and that is carrying a cargo designated with an ``T'' in the

``Vapor Detection'' column of table 4 of this part must have the safety

equipment required under Sec. 154.1400 and, in addition, must have the

following:

(1) Two sets of personnel safety equipment as described in

Sec. 154.1400(c).

(2) One spare fully-charged air cylinder unit for each breathing

apparatus required under paragraph (a)(1) of this section.

(b) Each vessel that has a cargo capacity of greater than 2,000

m\3\ and that is carrying a cargo designated with an ``I&T'' in the

``Vapor detection'' column of table 4 of this part must have the safety

equipment required under Secs. 154.1400 and 154.1401. In addition, the

vessel must have the following:

(1) One fully-charged air cylinder unit for each breathing

apparatus required under Sec. 154.1401.

(2) Two chemical protective outfits that protect the wearer from

the particular personnel hazards presented by the cargo vapor.

49. Section 154.1405 is revised to read as follows:

Sec. 154.1405 Respiratory and eye protection.

(a) When table 4 of this part references this section, a vessel

carrying the listed cargo must have--

(1) Respiratory protection and eye protection equipment for each

person on board that protects the person from the cargo vapor for at

least five minutes; and

(2) Two additional sets of respiratory protection and eye

protection equipment that are stowed in the wheel house and protect the

wearer from the cargo vapor for at least five minutes.

(b) The equipment in paragraph (a) of this section must be used for

emergency escape purposes only and must be marked to indicate that it

is not suitable for, and must not be used for, fire fighting or cargo

handling.

(c) Filter type respiratory protection equipment is unacceptable

for the purposes of this section.

50. Section 154.1705 is revised to read as follows:

Sec. 154.1705 Independent tank.

(a) The following cargoes must be carried in an independent tank:

(1) Diethyl ether.

(2) Monoethylamine.

(3) Propylene oxide.

(4) Vinyl ethyl ether.

(b) The following cargoes must be carried in an independent tank

type C that meets Sec. 154.701(a):

(1) Ethylene oxide.

(2) Methyl bromide.

(3) Sulfur dioxide.

51. Section 154.1718 is added to read as follows:

Sec. 154.1718 Submerged electric cargo pumps.

The vapor space of cargo tanks equipped with submerged electric

cargo pumps must be inerted to a positive pressure before loading,

during carriage, and during unloading of high vapor pressure flammable

liquids.

52. Section 154.1720 is revised to read as follows:

Sec. 154.1720 Indirect refrigeration.

A refrigeration system that is used to cool acetaldehyde, ethylene

oxide, methyl bromide, propylene oxide, mixtures of propylene oxide/

ethylene oxide, or sulfur dioxide must be an indirect refrigeration

system that does not use vapor compression.

53. Sections 154.1721 through 154.1724 are added to read as

follows:

Sec. 154.1721 Piping systems for toxic products.

The cargo piping, vent piping, and refrigeration equipment of

acargo tank carrying isopropylamine or monoethylamine must be

completely separate from all other piping systems on the vessel.

Sec. 154.1722 Flame screens on vent outlets.

When table 4 of this part refers to this section, the vent outlets

need not comply with Sec. 154.805(c) but must meet either of the

following:

(a) Be provided with a flame screen that--

(1) Meets Sec. 30.10-25 of this chapter;

(2) Is readily renewable; and

(3) Is designed and installed so as to prevent blockage by freezing

cargo vapors or by icing in bad weather.

(b) Have a device approved by the Commandant (G-MTH) to prevent the

passage of flame.

Sec. 154.1723 Maximum allowable quantity of cargo per tank.

When table 4 of this part refers to this section, no person may

operate a tankship that carries a cargo tank containing in excess of

3,000 m3 (105,923 ft3) of the listed cargo.

Sec. 154.1724 Vapor return connections.

When table 4 of this part refers to this section, connections for

returning the expelled gases ashore during loading must be provided.

Sec. 154.1735 [Amended]

54. In Sec. 154.1735(b)(2)(ii), remove the word ``guage'' and add,

in its place, the word ``gauge''.

55. Section 154.1745 is revised to read as follows:

Sec. 154.1745 Vinyl chloride: Transfer operations.

(a) The person in charge of a vinyl chloride transfer operation

shall ensure that the following are complied with during that

operation:

(1) Cargo vapors are returned to the cargo tank or shore

disposition for reclamation or destruction.

(2) Continuous monitoring for vinyl chloride vapor leaks is

conducted. Fixed or portable instrumentation may be used to ensure that

personnel are not exposed to vinyl chloride vapor concentrations in

excess of 1 ppm averaged over any eight hour period or 5 ppm averaged

over any period not exceeding 15 minutes. The method of monitoring and

measurement must have an accuracy (with a confidence level of 95%) of

not less than plus or minus 50% from 0.25 ppm through 0.5 ppm, plus or

minus 35% from over 0.5 ppm through 1.0 ppm, and plus or minus 25% over

1.0 ppm.

(3) The cargo transfer operation is discontinued or corrective

action is initiated by the person in charge to minimize personnel

exposure whenever a vinyl chloride vapor concentration in excess of 1

ppm is detected. If the vinyl chloride concentration exceeds 5 ppm for

over 15 minutes, action to reduce the leak may be continued only if

each person in the area of the leak uses a respirator which meets the

following:

(i) The respirator must be approved by the Mine Safety and Health

Administration (MSHA) under 30 CFR part 11. When filter elements are

used, they must include approval for vinyl chloride.

(ii) An electrically powered respirator also must meet the

electrical engineering requirements in subchapter J of this chapter for

the electrical hazard class and group listed in table 4 of this part.

(4) Those portions of the cargo line that would 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 vinyl chloride piping disconnect points is not greater than 5 ppm.

(5) Any restricted gauge fitted on a tank containing vinyl chloride

is locked or sealed so that the gauge cannot be used.

(6) A restricted gauge is not used as a means of verifying the

reading obtained by the closed gauge or as a means of sampling.

(b) The words ``Cancer Suspect Agent'' must be added to the warning

sign, as required by Sec. 154.1830(f).

(c) 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.

(d) When vinyl chloride transfer operations are conducted, the

vessel must be designated as a regulated area and access must be

limited to authorized persons. A daily roster of persons authorized to

enter the regulated area must be maintained on the vessel.

(e) Personnel engaged in hazardous operations, such as tank

cleaning, must be provided with, and required to wear and use,

respirators under paragraph (a)(3) of this section. Also, protective

garments capable of preventing skin contact with liquid vinyl chloride

must be provided. The garments must be clean and dry for each use.

56. In Sec. 154.1760, designate the text as paragraph (a) and add a

new paragraph (b) to read as follows:

Sec. 154.1760 Liquid ammonia.

* * * * *

(b) For pressure vessels and pipelines made of carbon-manganese

steel, the oxygen content of the vapor space must be reduced to the

minimum level practicable before the introduction of liquid ammonia at

temperatures of greater than -20 deg.C (-4 deg.F).

57. Sections 154.1765, 154.1770, and 154.1775 are added to read as

follows:

Sec. 154.1765 Diethyl ether; vinyl ethyl ether.

(a) Diethyl ether and vinyl ethyl ether cargoes must be discharged

by deepwell pumps or by hydraulically operated submerged pumps.

(b) When a diethyl ether or vinyl ethyl ether cargo is carried in

independent tanks type C, inert gas displacement may be used to

discharge the cargo if the cargo system is designed for the expected

pressure.

Sec. 154.1770 Propylene oxide and mixtures of propylene oxide and

ethylene oxide containing not more than 30% ethylene oxide by weight:

Requirements for carriage.

(a) Vessels carrying propylene oxide or a mixture of propylene

oxide and ethylene oxide containing not more than 30% ethylene oxide by

weight must meet the following:

(1) Acetylene must not be present in the propylene oxide or the

mixture of propylene oxide and ethylene oxide.

(2) Cargo piping, vent piping, refrigeration equipment, and inert

gas supply lines must be completely separate from piping systems for

all other tanks, including empty tanks and cargo compressors. If the

piping systems are not separate, they may be made separate by removing

spool pieces, valves, and other pipe sections and installing blank

flanges.

(3) Valves, flanges, fittings, and accessory equipment must be made

of steel, stainless steel, or other material specially approved by the

Commandant (G-MTH).

(4) Valve disk faces, seats, and other wearing parts of valves must

be made of stainless steel containing not less than 11% chromium.

(5) Gaskets must be constructed of spirally wound stainless steel

with teflon or other material specially approved by the Commandant (G-

MTH). Gaskets made of neoprene or natural rubber, asbestos or asbestos

mixed with other materials, or materials containing oxides of magnesium

must not be used in propylene oxide containment systems.

(6) Cargo piping must not have threaded joints.

(7) The vessel must have an exterior water spray system under

Sec. 154.1105 that protects the above deck cargo piping.

(8) The vessel must have a nitrogen inerting system or on board

nitrogen gas storage system capable of maintaining, for a period of

thirty days at an oxygen level of 2% or less, an inert atmosphere in

the vapor space of a tank carrying these cargoes.

(b) Cargo tanks carrying propylene oxide which have a design vapor

pressure of less than 0.6 Bar gauge (8.5 psig) and cargo tanks carrying

mixtures of propylene oxide and ethylene oxide containing not more than

30% ethylene oxide by weight which have a design vapor pressure of less

than 1.2 Bar gauge (17.1 psig) must have a refrigeration system that

maintains the product at a temperature below the reference temperature

under Sec. 154.1844(b).

(c) Cargo tanks in which the product is to be carried must meet the

following:

(1) Be constructed of steel or stainless steel.

(2) For independent tanks of type C, have pressure relief valves

settings that are--

(i) Not less than 0.2 Bar gauge (2.8 psig);

(ii) For propylene oxide, not more than 7.0 Bar guage (99.6 psig);

and

(iii) For propylene oxide and ethylene oxide mixtures, not more

than 5.3 Bar guage (75.4 psig).

(3) Have an automatic nitrogen make-up system that provides a

padding of nitrogen and that does not allow the tank pressure to fall

below 0.07 Bar guage (1.0 psig) in the event of a decrease in cargo

temperature. Sufficient nitrogen of commercially pure quality must be

available to satisfy this requirement. This requirement for automatic

pressure control may be satisfied by a battery of nitrogen bottles

connected to the cargo tank by a pressure reduction valve.

(4) Be thoroughly cleaned, including washing or purging of

associated piping, before other cargoes may be carried.

Sec. 154.1775 Propylene oxide and mixtures of propylene oxide and

ethylene oxide containing not more than 30% ethylene oxide by weight:

Transfer operations.

(a) Propylene oxide and mixtures of propylene oxide and ethylene

oxide containing not more than 30% ethylene oxide by weight may be

transported only in accordance with cargo handling plans which have

been approved by the Commanding Officer, U.S. Coast Guard Marine Safety

Center (G-MSC). A separate cargo handling plan for each loading

arrangement must be prepared which shows the entire piping system and

the location of all blank flanges installed under Sec. 154.1770(a)(2).

A copy of each approved cargo handling plan must be kept on board the

vessel. The IMO Certificate must be endorsed to include reference to

the approved cargo handling plans.

(b) Before loading the product, a person acceptable to the Captain

of the Port must perform the following:

(1) Certify in writing that the piping separation under

Sec. 154.1770(a)(2) has been achieved. This certification must be kept

on board the vessel.

(2) Fit a wire and seal to each connection between a blank flange

and a pipeline flange to ensure that the blank flange is not

inadvertently removed.

(c) A list of the maximum allowable tank filling limits for each

cargo tank, at each of the planned loading temperatures and at the

maximum reference temperature, must be prepared and submitted to the

Commanding Officer, U.S. Coast Guard Marine Safety Center (G-MSC) for

approval. A copy of the approved list must be kept on board the vessel.

(d) The master shall ensure that, before the product is loaded into

a cargo tank--

(1) The tank is thoroughly clean, dry, and free from 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 tested to ensure that the oxygen

concentration is 2% (by volume) or less.

(e) Cargo hoses used for the transfer of these products must be

marked ``FOR ALKYLENE OXIDE TRANSFER ONLY''.

(f) Filling and discharge piping must extend to within 100mm (4 in)

of the bottom of the tank or any sump pit.

(g) Venting of the cargo tanks to the atmosphere must not occur

during loading or discharge. A vapor return to shore may be used during

loading provided that the vapor return system connected to a

containment system for the product is separate from all other

containment systems.

(h) The pressure in the cargo tank must be maintained above 0.07

Bar guage (1.0 psig) during discharge operations.

(i) The cargo must be discharged by deepwell pumps, hydraulically

operated submerged pumps, or inert gas displacement.

(j) Cargo pumps must be arranged to ensure that, if the discharge

from the pump is turned off or otherwise blocked, there will not be a

significant increase in the temperature of the cargo.

(k) Before disconnecting the lines connecting to the shore

facility, the pressure in liquid and vapor lines must be relieved

through valves installed at the loading header. Liquid and vapor from

the lines must not be discharged to the atmosphere.

58. Section 154.1800 is revised to read as follows:

Sec. 154.1800 Operating requirements under part 35 of this chapter.

Each vessel must operate in accordance with part 35 of this

chapter, except for Sec. 35.30-20 of this chapter.

59. In Sec. 154.1803, paragraph (b) is revised to read as follows:

Sec. 154.1803 Expiration of Certificates of Compliance.

* * * * *

(b) If a vessel's IMO Certificate expires or otherwise becomes

invalid, the vessel's Certificate of Compliance becomes invalid for the

carriage of cargoes listed in table 4 of this part or authorized by

special approval under Sec. 154.30. To maintain the validity of the

Certificate of Compliance, the vessel's owner must submit a copy of the

revised or reissued IMO Certificate to the Commanding Officer, U.S.

Coast Guard Marine Safety Center (G-MSC).

60. Section 154.1818, paragraph (a) is revised to read as follows:

Sec. 154.1818 Certification of inhibition.

(a) Except as provided in Sec. 154.1740(b), no person may operate a

vessel carrying butadiene, isoprene, vinyl chloride, vinyl ethyl ether,

or vinylidene chloride without carrying in the wheelhouse written

certification from the shipper that the product is inhibited.

* * * * *

Sec. 154.1820 [Amended]

61. In Sec. 154.1820 introductory text, remove the word

``wheelhoue'' and add, in its place, the word ``wheelhouse''.

62. Section 154.1831 is revised to read as follows:

Sec. 154.1831 Person in charge of cargo transfer operations.

(a) The master of a U.S. flag vessel shall ensure that cargo

transfer operations are supervised by a person designated as a person

in charge of cargo transfer operations under 33 CFR 155.710(a)(1).

(b) The master of a foreign flag vessel shall ensure that the cargo

transfer operations are supervised by a person who--

(1) Holds a valid document issued by the flag nation which

authorizes that person to serve as a person in charge of cargo transfer

operations on board the vessel that is transferring cargo;

(2) Is designated as a person in charge of cargo transfer

operations by the master;

(3) Is readily able to communicate in English, either directly or

through an interpreter, with the person in charge of cargo transfer at

the transfer facility; and

(4) Has studied and understands the responsibilities described in

this subchapter.

63. Section 154.1832 is added to read as follows:

Sec. 154.1832 Incompatible cargo.

(a) The person in charge of cargo transfer operations under

Sec. 154.1831 may not authorize the loading of incompatible cargoes

under part 150 of this chapter, unless the cargo containment systems

meet the following:

(1) Are separated by--

(i) Cofferdams, other than spaces between primary and secondary

barriers;

(ii) Empty tanks;

(iii) Tanks containing mutually compatible cargoes;

(iv) Pipe tunnels; or

(v) Void spaces.

(2) Have separate cargo piping and venting systems.

(b) The person in charge of cargo transfer operations may not

authorize the loading into a tank of a cargo that is incompatible under

part 150 of this chapter with residue left in the tank from a previous

cargo.

64. Section 154.1834 is revised to read as follows:

Sec. 154.1834 Cargo transfer piping.

The person in charge of cargo transfer operations under

Sec. 154.1831 shall ensure that--

(a) Cargo is transferred to or from a cargo tank only through the

vessel's cargo piping system; and

(b) All cargo vapor or cargo tank inert gas displaced by the cargo

loading operation is--

(1) Managed on board the vessel to eliminate atmospheric venting;

or

(2) Returned to shore through the vapor return connections under

Sec. 154.1724, if the transfer terminal has vapor return equipment

capable of handling the vapor from the cargo tank.

65. In Sec. 154.1850, paragraph (d) is added to read as follows:

Sec. 154.1850 Entering cargo handling spaces.

* * * * *

(d) Before permitting hot work near internal insulation tanks, the

gas absorbing and desorbing characteristics of the tank insulation

material must be taken into consideration.

66. In Sec. 154.1870(d), revise the list of chemicals to read as

follows:

Sec. 154.1870 Bow and stern loading.

* * * * *

(d) * * *

(1) Acetaldehyde.

(2) Ammonia, anhydrous.

(3) Diethyl ether.

(4) Dimethylamine.

(5) Ethyl chloride.

(6) Isopropylamine.

(7) Methyl chloride.

(8) Monethylamine.

(9) Propylene oxide.

(10) Vinyl chloride.

(11) Viny ethyl ether.

(12) Vinylidene chloride.

67. Following Sec. 154.1872, revise table 4 and its footnotes to

read as follows;

Sec. 154.1872 Cargo emergency jettisoning.

* * * * *

Table 4.--Summary of Minimum Requirements

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

Electrical

Independent Control of Vapor hazard class

Cargo name\1\\2\ Ship type tank type C cargo tank detection\3\ Gauging\4\ and group\5\ Special requirements in part 154

required vapor space

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

Acetaldehyde..................... IIG/IIPG ............ Inert....... I & T C 1-C 1401, 1402, 1410, 1710, 1720,

1870.

Ammonia, anhydrous............... IIG/IIPG ............ ............ T C 1-D 1402, 1405, 1410, 1702 (b), (c) &

(e), 1760, 1870.

Butadiene........................ IIG/IIPG ............ Inert....... I R 1-B 1401, 1702 (b), (d) & (f), 1710,

1750, 1818.

Butane........................... IIG/IIPG ............ ............ I R 1-D 1401.

Butylene......................... IIG/IIPG ............ ............ I R 1-D 1401.

Diethyl ether\6\................. IIG/IIPG ............ Inert....... I & T C 1-C 1401, 1405, 1410, 1702(b),

1705(a), 1710, 1722-1724, 1765,

1870(d).

Dimethylamine.................... IIG/IIPG ............ ............ I C 1-C 1401, 1402, 1405, 1410, 1702 (b),

(c) & (e), 1870.

Ethane........................... IIG ............ ............ I R 1-D 1401.

Ethyl chloride................... IIG/IIPG ............ ............ I & T R 1-D 1401, 1402, 1870.

Ethylene......................... IIG ............ ............ I R 1-C 1401.

Ethylene oxide................... IG Yes......... Inert....... I & T C 1-B 660(b)(3), 1401, 1402, 1405,

1410, 1702 (b), (d) & (f),

1705(b), 1710, 1720, 1725, 1730,

1870 (a) & (b).

Isoprene\6\...................... IIG/IIPG ............ ............ I R 1-D 1401, 1410, 1718, 1722, 1724,

1728, 1818.

Isopropylamine\6\................ IIG/IIPG ............ ............ I & T C 1-D 1401, 1405, 1702 (b) & (c), 1718,

1721, 1722, 1723, 1724, 1870(d).

Methane (LNG).................... IIG ............ ............ I C 1-D 703-709, 1401, 1854.

Methyl acetylene-propadiene IIG/IIPG ............ ............ I R 1-C 1401, 1735.

mixture.

Methyl bromide................... IG Yes......... ............ T C 1-D 660(b)(3), 1345 (c) & (d), 1402,

1405, 1410, 1702 (a) & (d),

1705(b), 1720, 1870 (a) & (b).

Methyl chloride.................. IIG/IIPG ............ ............ I & T C 1-D 1401, 1402, 1702(a), 1870.

Monoethylamine\6\................ IIG/IIPG ............ ............ I & T C 1-D 1401, 1402, 1405, 1702 (b) & (c),

1718, 1721, 1722, 1723, 1724,

1870(d).

Nitrogen......................... IIIG ............ ............ O........... C ............ 1755.

Propane.......................... IIG/IIPG ............ ............ I R 1-D 1401.

Propylene........................ IIG/IIPG ............ ............ I R 1-D 1401.

Propylene oxide\6\............... IIG/IIPG ............ Inert....... I & T C 1-B 1401, 1402, 1410, 1705(a), 1710,

1720, 1722, 1723, 1724, 1770,

1775, 1870(d).

Propylene oxide and ethylene IIG/IIPG ............ Inert....... I & T C 1-B 1401, 1402, 1410, 1705(a), 1710,

oxide mixture (30% w/w ethylene 1720, 1722, 1723, 1724, 1770,

oxide)\6\. 1775, 1870(d).

Refrigerant gases................ IIIG ............ ............ ............ R ............ None.

Sulfur dioxide................... IG Yes......... Dry......... T C ............ 660(b)(3), 1345 (c) & (d), 1401,

1402, 1405, 1410, 1705(b), 1715,

1720, 1870 (a) & (b).

Vinyl chloride................... IIG/IIPG ............ ............ I & T C 1-D 1401, 1405, 1410, 1702 (a), (b),

(d) & (f), 1710, 1740, 1745,

1750, 1818, 1830(f), 1870.

Vinyl ethyl ether\6\............. IIG/IIPG ............ Inert....... I & T C ............ 1401, 1402, 1405, 1410, 1705(a),

1710, 1722, 1723, 1724, 1765,

1818, 1870(d).

Vinylidene chloride\6\........... IIG/IIPG ............ Inert....... I & T R 1-D 1401, 1402, 1405, 1410, 1710,

1722, 1723, 1724, 1818, 1870(d).

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

\1\Refrigerant gases include non-toxic, non-flammable gases, such as dichlorodifluoromethane, dichloromonofluoromethane, dichlorotetrafluoroethane,

monochlorodifluoromethene, monochlortetrafluoroethane, and monochlortrifluoromethane.

\2\Unless otherwise specified, a cargo may be shipped under these requirements when it contains up to 5% total acetylene.

\3\As used in this column, ``I'' stands for flammable vapor detection, ``T'' stands for toxic vapor detection, and ``O'' stands for oxygen detection.

See Secs. 154.1345 through 154.1360.

\4\As used in this column, ``C'' stands for closed gauging and ``R'' stands for restricted gauging. See Sec. 154.1300.

\5\The designations used in this column are from the National Electrical Code.

\6\This cargo is covered also by part 153 of this chapter.

Dated: April 18, 1994.

A.E. Henn,

Rear Admiral, U.S. Coast Guard, Chief, Office of Marine Safety,

Security and Environmental Protection.

[FR Doc. 94-13537 Filed 6-3-94; 8:45 am]

BILLING CODE 4910-14-M