49 CFR § 173.302c - Additional requirements for the shipment of adsorbed gases in UN pressure receptacles.
(a) A cylinder filled with an adsorbed gas must be offered for transportation in UN pressure receptacles subject to the requirements in this section and § 173.302, as well as, §§ 173.301 and 173.301b.
(b) The pressure of each filled cylinder must be less than 101.3 kPa at 20 °C (68 °F) and must not exceed 300 kPa at 50 °C (122 °F).
(f) The adsorbent material must be compatible with the cylinder and must not form harmful or dangerous compounds with the gas to be adsorbed. The gas in combination with the adsorbent material must not affect or weaken the cylinder or cause a dangerous reaction (e.g., a catalyzing reaction).
(g) The quality of the adsorbent material must be verified at the time of each fill to assure the pressure and chemical stability requirements of this section are met each time an adsorbed gas package is offered for transport.
(2) Each valve must either be of the packless type with non-perforated diaphragm, or be of a type which prevents leakage through or past the packing.
(4) Each valve must be capable of withstanding the test pressure of the cylinder and be directly connected to the cylinder by either a taper-thread or other means which meets the requirements of ISO 10692-2 (IBR, see § 171.7 of this subchapter); and
(5) Cylinders and valves must not be fitted with a pressure relief device.
(k) The filling procedure must be in accordance with Annex A of ISO 11513 (IBR, see § 171.7 of this subchapter).
(l) The maximum period for periodic requalification must be in accordance with § 180.207(c) of this subchapter.
Adsorbed Gases Table
|ID No.||Hazardous material||LC50 ml/m 3||Notes|
|3510||Adsorbed gas, flammable, n.o.s.||z.|
|3511||Adsorbed gas, n.o.s.||z.|
|3512||Adsorbed gas, toxic, n.o.s.||≤5000||z.|
|3513||Adsorbed gas, oxidizing, n.o.s.||z.|
|3514||Adsorbed gas, toxic, flammable, n.o.s.||≤5000||z.|
|3515||Adsorbed gas, toxic, oxidizing, n.o.s.||≤5000||z.|
|3516||Adsorbed gas, toxic, corrosive, n.o.s.||≤5000||z.|
|3517||Adsorbed gas, toxic, flammable, corrosive, n.o.s.||≤5000||z.|
|3518||Adsorbed gas, toxic, oxidizing, corrosive, n.o.s.||≤5000||z.|
|3519||Boron trifluoride, adsorbed||387||a.|
|3521||Silicon tetrafluoride, adsorbed||450||a.|
|3523||Germane, adsorbed||620||d, r.|
|3524||Phosphorus pentafluoride, adsorbed||190|
|3526||Hydrogen selenide, adsorbed||2|
a: Aluminum alloy cylinders must not be used.
d: When steel cylinders are used, only those bearing the “H” mark in accordance with § 173.302b(f) are authorized.
r: The filling of this gas must be limited such that, if complete decomposition occurs, the pressure does not exceed two thirds of the test pressure of the cylinder.
z: The construction materials of the cylinders and their accessories must be compatible with the contents and must not react to form harmful or dangerous compounds therewith.
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