§ 173.338 Tungsten hexafluoride.
发布08-07
生效09-08
摘要总结AI 辅助解读
该条款规定了六氟化钨（Tungsten hexafluoride）在美国境内运输的包装与检验要求。核心义务包括：必须使用3A、3AA、3BN或3E规格气瓶；气瓶需配备阀门保护帽或符合§173.40的外包装，且阀门出口需封堵。特别指出，3E规格气瓶必须装入符合§173.40规定的集装器（overpack）。此外，用于专用服务（exclusive service）的DOT 3BN气瓶可用外部目视检查替代容积膨胀测试，但若退出六氟化钨服务则必须报废。建议相关方核实气瓶规格合规性及检验记录。
- (a) Tungsten hexafluoride must be packaged in specification 3A, 3AA, 3BN, or 3E (§§ 178.36, 178.37, 178.39, 178.42 of this subchapter) cylinders. Cylinders must be equipped with a valve protection cap or be packed in a strong outer packaging meeting the provisions of § 173.40. Outlets of any valves must be capped or plugged. As an alternative, the cylinder opening may be closed by the use of a metal plug. Specification 3E cylinders must be shipped in an overpack that meets the provisions of § 173.40.
- (b) In place of the volumetric expansion test, DOT 3BN cylinders used in exclusive service may be given a complete external visual inspection in conformance with part 180, subpart C, of this subchapter, at the time such periodic requalification becomes due. Cylinders that undergo a complete external visual inspection, in place of the volumetric expansion test, must be condemned if removed from tungsten hexafluoride service.
[74 FR 16143, Apr. 9, 2009, as amended at 75 FR 5395, Feb. 2, 2010]