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Federal Register / Vol. 86, No. 151 / Tuesday, August 10, 2021 / Proposed Rules iii By protecting the valves by shrouds or guards conforming to the requirements in ISO 11117:2008E and Technical Corrigendum 1 IBR; see 171.7 of this subchapter. Until December 31, 2014, the manufacture of a shroud or guard conforming to the requirements in ISO 11117:1998E IBR, see 171.7 of this subchapter was authorized. For metal hydride storage systems, by protecting the valves in accordance with the requirements in ISO 16111:2008E IBR; see 171.7 of this subchapter.
iv By using valves designed and constructed with sufficient inherent strength to withstand damage in accordance with Annex B of ISO
10297:2014E;
v By enclosing the UN pressure receptacles in frames e.g., bundles of cylinders;
vi By packing the UN pressure receptacles in a strong outer package, such as a box or crate, capable of meeting the drop test specified in 178.603 of this subchapter at the Packing Group I performance level; or vii By using valves designed and constructed in accordance with Annex A of ISO 17879:2017E IBR, see 171.7
of this subchapter for UN pressure receptacles with self-closing valves with inherent protection except those in acetylene service.

33. In 173.304b, revise paragraph b2 to read as follows:
173.304b Additional requirements for shipment of liquefied compressed gases in UN pressure receptacles.

b
2 For low pressure liquefied gases, the maximum mass in kilograms of contents per liter of water capacity must be less than or equal to 95 percent of the liquid phase at 50 C. In addition, the UN pressure receptacle may not be liquid full at 60 C. The test pressure of the pressure receptacle must be equal to or greater than the vapor pressure of the liquid at 65 C.

34. In 173.306, revise paragraphs f2i and 3iv, and add paragraph n to read as follows:

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173.306 Limited quantities of compressed gases.

f
2
i Each accumulator must be shipped as an inside packaging. Robust accumulators may be transported unpackaged, in crates, or in appropriate overpacks when the hazardous materials
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are afforded equivalent protection by the article in which they are contained;

3
iv Accumulators must be packaged in strong outer packaging. Robust accumulators may be transported unpackaged, in crates, or in appropriate overpacks when the hazardous materials are afforded equivalent protection by the article in which they are contained.

n Receptacles, small, containing gas or gas cartridges for recycling or disposal. Receptacles, small, containing gas or gas cartridges not exceeding 1.0
L 0.3 gallons capacity may be offered for transportation for the purposes of recycling or disposal. Receptacles, small, containing gas or gas cartridges are not required to be protected against shifting and inadvertent discharge if measures to prevent dangerous build-up of pressure and dangerous atmospheres are addressed and are excepted from the specification packaging requirements of this subchapter when packaged and offered in accordance with this paragraph n.
1 Receptacles, small containing gas or gas cartridges for recycling or disposal, other than those that are leaking or severely deformed, must be packaged as follows:
i The receptacles, small, containing gas or gas cartridges must be packaged in a strong outer packaging. The strong outer packaging and its contents must not exceed a gross weight of 55 kg 121
pounds for fiberboard packagings or 125 kg 275 pounds for other packagings; and ii Packagings must be adequately ventilated to prevent the creation of dangerous atmospheres and build-up of pressure.
2 Rigid large packagings are authorized conforming to the packing group II performance level made of:
i Steel 50A; Aluminum 50B;
Metal other than steel or aluminum 50N; Rigid plastics 50H; Natural wood 50C; Plywood 50D;
Reconstituted wood 50F; Rigid fiberboard 50G.
ii Large packagings must be designed and constructed to prevent dangerous shifting and inadvertent discharge during normal conditions of transport;
iii Large packagings must be adequately ventilated to prevent the creation of dangerous atmospheres and the build-up of pressure; and iv Leaking or severely deformed containers must be transported in salvage cylinders or salvage packagings provided adequate measures are taken
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to prevent a dangerous build-up of pressure.
3 Receptacles, small, containing gas or gas cartridges for recycling or disposal must not be transported in closed freight containers.
4 Receptacles, small, containing gas or gas cartridges for recycling or disposal that were filled with Division 2.2 gases and have been pierced are not subject to the requirements of this subchapter.
35. In 173.335, revise paragraph d to read as follows:
173.335

Chemical under pressure n.o.s.

d Periodic inspection.
1 Except as specified in d2 of this section, the maximum requalification test period for cylinders transporting chemical under pressure n.o.s. is 5
years.
2 For cylinders with maximum capacity of 450 L or less and filled with materials used as fire extinguishing agents, the maximum requalification test period is 10 years.

PART 175CARRIAGE BY AIRCRAFT
36. The authority citation for part 175
continues to read as follows:

Authority: 49 U.S.C. 51015128, 44701; 49
CFR 1.81 and 1.97.

37. In 175.8, add paragraph b5 to read as follows:

175.8 Exceptions for operator equipment and items of replacement.

b
5 Alcohol-based hand sanitizers and alcohol-based cleaning products that are accessible to crewmembers for use on the aircraft during the flight or series of flights for the purposes of passenger and crew hygiene. Conditions for the carriage and use must be described in an operations manual and/or other appropriate manuals.
38. In 175.9, revise paragraph b5ii to read as follows:
175.9

Special aircraft operations.

b
5
ii Each type of battery used is either nonspillable, lithium metal, or lithium ion. Lithium metal or lithium ion batteries must meet the provisions of 173.185a of this subchapter. Spare batteries must be individually protected to prevent short circuits when not in use;

39. In 175.10, revise paragraphs a1 and 11 to read as follows:

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10AUP4