1.1 本规范 2. 用于高温、腐蚀或核压力环境的奥氏体合金钢管。 1.2 如所示，涵盖了几种等级的奥氏体不锈钢 表1 . 1.3 当可能需要额外测试时，提供可选的补充要求。 1.4 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值可能不是精确的等效值；因此，每个系统应相互独立使用。将两个系统的值合并可能会导致不符合标准。 1.4.1 在文本中，国际单位显示在括号中。 注1: 本规范不适用于由含0.20%以上的合金制成的离心管 % 碳，如规范所涵盖的 A297/A297M . 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 2 covers austenitic alloy steel pipe for use in high-temperature, corrosive, or nuclear pressure service. 1.2 Several grades of austenitic stainless steel are covered as indicated in Table 1 . 1.3 Optional supplementary requirements are provided when additional testing may be required. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.4.1 Within the text, the SI units are shown in brackets. Note 1: This specification is not intended to cover centrifugal pipe made from alloys containing more than 0.20 % carbon, such as are covered by Specification A297/A297M . 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.