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Federal Register / Vol. 86, No. 151 / Tuesday, August 10, 2021 / Proposed Rules

Provisions

PART 178SPECIFICATIONS FOR
PACKAGINGS
43. The authority citation for part 178
continues to read as follows:

Authority: 49 U.S.C. 51015128; 49 CFR
1.81 and 1.97.

44. In 178.3, revise paragraph a4
to read as follows:

178.3

Marking of packagings.

a
4 Unless otherwise specified, letters and numerals must be at least 12.0 mm 0.47 inches in height except for packagings of less than or equal to 30 L
7.9 gallons capacity for liquids or 30
kg 66 pounds maximum net mass for solids the height must be at least 6.0
mm 0.2 inches. For packagings having a capacity of 5 L 1.3 gallons or less or of 5 kg 11 pounds maximum net mass, letters and numerals must be of an appropriate size.

45. In 178.71 by:
a. Revising paragraph d2;
b. Adding paragraph l1iv, and c. Revising paragraph o1
The revisions and additions read as follows:
178.71 Specifications for UN pressure receptacles.

jbell on DSKJLSW7X2PROD with PROPOSALS4

d
2 Service equipment must be configured, or designed, to prevent damage that could result in the release of the pressure receptacle contents during normal conditions of handling and transport. Manifold piping leading to shut-off valves must be sufficiently flexible to protect the valves and the piping from shearing or releasing the pressure receptacle contents. The filling and discharge valves and any protective caps must be secured against unintended opening. The valves must conform to ISO 10297:2014E and ISO
10297:2014/Amd 1:2017E, or for nonrefillable pressure receptacles valves manufactured until December 31, 2020, ISO 13340:2001E IBR, see 171.7 of this subchapter, and be protected as specified in 173.301bf of this subchapter. Until December 31, 2022, the manufacture of a valve conforming to the requirements of ISO
10297:2014E IBR, see 171.7 of this subchapter is authorized. Until December 31, 2020, the manufacture of a valve conforming to the requirements
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19:16 Aug 09, 2021

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in ISO 10297:2006E IBR, see 171.7
of this subchapter was authorized.
Until December 31, 2008, the manufacture of a valve conforming to the requirements in ISO 10297:1999 E
IBR, see 171.7 of this subchapter was authorized. Additionally, valves must be initially inspected and tested in accordance with ISO 14246:2014E and ISO 14246:2014/Amd 1:2017E, Gas cylindersCylinder valves Manufacturing tests and examinations IBR, see 171.7 of this subchapter. For self-closing valves with inherent protection, the requirements of ISO
17879:2017E IBR, see 171.7 of this subchapter shall be met until further notice.

l
1
iv ISO 111194:2016E IBR, see 171.7 of this subchapter. Until December 31, 2020, cylinders conforming to the requirements in ISO
111194E IBR, see 171.7 of this subchapter was authorized.

o
1 ISO 111141:2012E and 11114
1:2012/Amd 1:2017E IBR, see 171.7
of this subchapter.

46. In 178.75, revise paragraph d3
introductory text and add paragraphs d3vi through ix to read as follows:

viii ISO 111193:2013E Gas cylinders Refillable composite gas cylinders and tubesDesign, construction and testingPart 3: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450 L with non-load-sharing metallic or nonmetallic liners IBR, see 171.7 of this subchapter.
ix ISO 111194:2016 Gas cylindersRefillable composite gas cylindersDesign, construction and testingPart 4: Fully wrapped fibre reinforced composite gas cylinders up to 150 L with load-sharing welded metallic liners IBR, see 171.7 of this subchapter.

47. In 178.275, revise paragraph i2iA to read as follows:

178.75

Where:
Q = minimum required rate of discharge in cubic meters of air per second m3/s at conditions: 1 bar and 0 C 273 K;
F = for uninsulated shells: 1; for insulated shells: U649t/13.6 but in no case, is less than 0.25
Where:
U = heat transfer coefficient of the insulation, in kW m2K1, at 38 C 100 F; and t = actual temperature of the hazardous material during filling in C or when this temperature is unknown, let t = 15
C 59 F. The value of F given in this paragraph i2iA for insulated shells may only be used if the insulation is in conformance with paragraph i2iv of this section;
A = total external surface area of shell in square meters;
Z = the gas compressibility factor in the accumulating condition when this factor is unknown, let Z equal 1.0;
T = absolute temperature in Kelvin C + 273
above the pressure relief devices in the accumulating condition;
L = the latent heat of vaporization of the liquid, in kJ/kg, in the accumulating condition;

Specifications for MEGCs.

d
3 Each pressure receptacle of a MEGC must be of the same design type, seamless steel or composite, and constructed and tested according to one of the following ISO standards, as appropriate:

vi ISO 111191:2012E, Gas cylindersRefillable composite gas cylinders and tubesDesign, construction and testingPart 1: Hoop wrapped fibre reinforced composite gas cylinders and tubes up to 450 L IBR, see 171.7 of this subchapter.
vii ISO 111192:2012E and ISO
111192:2012/Amd.1:2014E, Gas cylindersRefillable composite gas cylinders and tubesDesign, construction and testingPart 2: Fully wrapped fibre reinforced composite gas cylinders and tubes up to 450 L with load-sharing metal liners both IBR, see 171.7 of this subchapter.

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178.275 Specification for UN Portable Tanks intended for the transportation of liquid and solid hazardous materials.

i
2
i
A To determine the total required capacity of the relief devices, which must be regarded as being the sum of the individual capacities of all the contributing devices, the following formula must be used:

Q =12.4 F.A.82
LC

E:FRFM10AUP4.SGM

10AUP4

/if
JM

EP10AU21.025

Notes