1.1 本规范 2. 包括镍和镍合金无缝管，如所示 表1 ，用于冷凝器和热交换器。 1.2 本规范涵盖外径和平均壁厚，或外径和最小壁厚管。 1.2.1 本规范涵盖的尺寸为3 在里面(76.2 mm）及以下，最小壁厚为0.148 在里面(3.76 mm）及以下，平均壁厚为0.165 在里面(4.19 mm）及以下。 1.3 管道应按所示的合金和条件提供 表2 . 对于小直径和轻壁管（转换器尺寸），请参阅 附录X2 . 1.4 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 以下安全隐患警告仅适用于试验方法部分第节 12 ，本规范 . 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任熟悉所有危险，包括制造商提供的本产品/材料的适当安全数据表（SDS）中确定的危险，建立适当的安全、健康和环境实践，并在使用前确定监管限制的适用性。 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 2 covers seamless tubes of nickel and nickel alloys, as shown in Table 1 , for use in condenser and heat-exchanger service. 1.2 This specification covers outside diameter and average wall, or outside diameter and minimum wall tube. 1.2.1 The sizes covered by this specification are 3 in. (76.2 mm) and under in outside diameter with minimum wall thicknesses of 0.148 in. (3.76 mm) and under, and with average wall thicknesses of 0.165 in. (4.19 mm) and under. 1.3 Tube shall be furnished in the alloys and conditions as shown in Table 2 . For small diameter and light wall tube (converter sizes), see Appendix X2 . 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 The following safety hazards caveat pertains only to the test method portion, Section 12 , of this specification . This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 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.