Billing Code - PHMSA - Department of Transportation

(ii) By equipping the UN pressure receptacle with a valve cap conforming to
the requirements in ISO 11117 and Technical Corrigendum 1 (IBR, see § 171.7 of this
subchapter). The cap must have vent-holes of sufficient cross-sectional area to evacuate
the gas if leakage occurs at the valve;
* * *
(d) Non-refillable UN pressure receptacles. (1) When the use of a valve is
prescribed, the valve must conform to the requirements in ISO 13340 (IBR, see § 171.7
of this subchapter).
package;
(2) The receptacles must be transported as an inner package of a combination
(3) The receptacle must have a water capacity not exceeding 1.25 L when used for
a flammable or toxic gas or 50 liters for receptacles used to contain chemical under
pressure; and
(4) The receptacle is prohibited for Hazard Zone A material.
* * * * *
60. In § 173.302a, paragraph (a)(3) is amended to read as follows
§ 173.302a Additional requirements for shipment of nonliquefied (permanent)
compressed gases in specification cylinders.
(a) * * *
(3) DOT 39 DOT 39 cylinders. When the cylinder is filled with a Division 2.1
material, the internal volume of the cylinder may not exceed 1.23 L (75 in 3 ) or 50 L
(3050 in 3 ) for chemical under pressure.
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