§ 173.320 Cryogenic liquids; exceptions.
发布08-07
生效09-08
摘要总结AI 辅助解读
本条款规定了低温液体（大气气体及氦气）在特定包装下的豁免情形。若使用杜瓦瓶、绝热气瓶等且运输中压力不超过25.3 psig，公路和铁路运输可豁免大部分危险品法规要求，但事故报告、部分标签/标记及基础安全规定仍适用。装卸或工艺运行期间压力可能超标时亦不受限。航空运输需遵循ICAO技术指令。建议核实包装规格与压力控制阀设计是否符合豁免条件。
- (a) Atmospheric gases and helium, cryogenic liquids, in Dewar flasks, insulated cylinders, insulated portable tanks, insulated cargo tanks, and insulated tank cars, designed and constructed so that the pressure in such packagings will not exceed 25.3 psig under ambient temperature conditions during transportation are not subject to the requirements of this subchapter when transported by motor vehicle or railcar except as specified in paragraphs (a)(1), (a)(2), and (a)(3) of this section.
- (1) Sections 171.15 and 171.16 of this subchapter pertaining to the reporting of incidents, not including a release that is the result of venting through a pressure control valve, or the neck of the Dewar flask.
- (2) Subparts A, B, C, D, G and H of part 172, (§§ 174.24 for rail and 177.817 for highway) and in addition, part 172 in its entirety for oxygen.
- (3) Subparts A and B of part 173, and §§ 174.1 and 177.800, 177.804, and 177.823 of this subchapter.
- (b) The requirements of this subchapter do not apply to atmospheric gases and helium:
- (1) During loading and unloading operations (pressure rises may exceed 25.3 psig); or
- (2) When used in operation of a process system; such as a refrigeration system (pressure may exceed 25.3 psig).
- (c) For transportation aboard aircraft, see the ICAO Technical Instructions (IBR, see § 171.7 of this subchapter), Packing Instruction 202 and the packaging specifications in part 6, chapter 5.
[Amdt. 173-201, 52 FR 13043, Apr. 20, 1987, as amended at 62 FR 51561, Oct. 1, 1997; 66 FR 33436, June 21, 2001; 67 FR 61014, Sept. 27, 2002; 68 FR 48570, Aug. 14, 2003; 68 FR 75746, Dec. 31, 2003]