1.1 本规范涵盖机械应用中使用的无缝不锈钢管，或作为空心棒用于生产空心部件，例如但不限于喷嘴、异径管和需要耐腐蚀或高温强度的机加工联轴器。所涵盖的年级列于 表1 , 表2 和 表3 . 1.2 本规范涵盖尺寸不超过12的无缝冷加工机械管和空心棒以及无缝热加工机械管和空心棒 3. / 4. 在里面[325 mm]外径（对于圆管），壁厚或内径符合要求。 1.3 机械应用的管道应按照买方的规定提供以下形状之一:圆形、方形、矩形或特殊形状。用作空心钢筋的管子应为圆形。 1.4 提供了可选的补充要求，如果需要，应在订单中说明。 1.5 以英寸-磅为单位的数值应视为标准值。在文本中，国际单位用方括号表示。每个系统中规定的值不是精确的等价物；因此，每个系统应相互独立使用。 1.6 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 stainless 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 , Table 2 , and Table 3 . 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 Tubes for mechanical applications shall be furnished in one of the following shapes, as specified by the purchaser: round, square, rectangular, or special. Tubes to be used as hollow bar shall be furnished in round shape. 1.4 Optional supplementary requirements are provided and when desired, shall be stated in the order. 1.5 The values stated in inch-pound units are to be regarded as the standard. Within the text, the SI units are shown in square brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. 1.6 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.