1.1 本规范涵盖了机械应用中使用的无缝镍合金管或空心棒材，用于生产空心部件，如但不限于需要耐腐蚀或高温强度的机械加工喷嘴、异径管和联轴器。涵盖的等级列在 表1 . 1.2 本规范涵盖无缝冷加工机械管和空心棒材，以及尺寸最大为12的无缝热加工机械管及空心棒材 3. / 4. 在里面外径为[325 mm]（对于圆管），壁厚或内径符合要求。 1.3 提供了可选的补充要求，如果需要，应在订单中说明。 1.4 以国际单位或英寸-磅单位表示的数值应单独视为标准值。每个系统中所述的值不一定精确相等； 因此，为了确保符合标准，每个系统应独立于另一个系统使用，并且两个系统的值不应合并。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers seamless nickel alloy tubing for use in mechanical applications or as hollow bar for use in the production of hollow components such as, but not limited to, nozzles, reducers, and couplings by machining where corrosion-resistant or high-temperature strength is needed. The grades covered are listed in Table 1 . 1.2 This specification covers seamless cold-finished mechanical tubing and hollow bar, and seamless hot-finished mechanical tubing and hollow bar in sizes up to 12 3 / 4 in. [325 mm] in outside nominal diameter (for round tubing) with wall thicknesses or inside diameters as required. 1.3 Optional supplementary requirements are provided and when desired, shall be stated in the order. 1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.