政策法规现行有效美国危险品合规

§ 173.337 Nitric oxide.

效力	法规类型	发布日期	生效日期	发文机构
现行有效	部门规章	2026-08-07	2026-09-08	Code of Federal Regulations (CFR) - Transportation (Title 49)

发布08-07

生效09-08

摘要总结AI 辅助解读

该法规详细规定了美国境内运输一氧化氮（Nitric Oxide）的危险品包装要求。核心内容包括：必须使用符合§173.40的气瓶，具体涵盖DOT规格气瓶（如3A1800等，充装压力≤5,170 kPa，其中3AL仅限公路和铁路运输）或UN气瓶（最小测试压力200 bar，最大工作压力≤50 bar）。严禁使用UN管式容器和MEGCs。气瓶需配备不锈钢阀门且不得安装任何泄压装置。此外，对气瓶清洁有严格标准，UN气瓶需符合ISO 11621，DOT气瓶需符合GSA RR-C-901D，并规定了抽样检测油污污染的具体程序。

(a) Nitric oxide must be packaged in cylinders conforming to the requirements of § 173.40 and as follows:

- (1) DOT specification cylinder. In a DOT 3A1800, 3AA1800, 3E1800, or 3AL1800 cylinder. A DOT specification cylinder must be charged to a pressure of not more than 5,170 kPa (750 psi) at 21 °C (70 °F). Transportation of nitric oxide in a DOT 3AL is cylinder is authorized only by highway and rail.

- (2) UN cylinder. In a UN cylinder with a minimum test pressure of 200 bar. The maximum working pressure of the cylinder must not exceed 50 bar. The pressure in the cylinder at 65 °C (149 °F) may not exceed the test pressure. The use of UN tubes and MEGCs is not authorized.

- (3) Valves. Cylinders must be equipped with a stainless steel valve and valve seat that will not deteriorate in contact with nitric oxide. Cylinders or valves may not be equipped with pressure relief devices of any type.

(b) Each UN cylinder must be cleaned in accordance with the requirements of ISO 11621 (IBR, see § 171.7 of this subchapter). Each DOT specification cylinder must be cleaned in compliance with the requirements of GSA Federal Specification RR-C-901D, paragraphs 3.3.1 and 3.3.2 (IBR, see § 171.7 of this subchapter). Cleaning agents equivalent to those specified in Federal Specification RR-C-901D may be used; however, any cleaning agent must not be capable of reacting with oxygen. One cylinder selected at random from a group of 200 or fewer and cleaned at the same time must be tested for oil contamination in accordance with Federal Specification RR-C-901D paragraph 4.3.2 and meet the standard of cleanliness specified therein.

[71 FR 33885, June 12, 2006]