1.1 本规范规定了0.250至2.125英寸无缝和焊接铜镍管的要求。（6.35至54.0 mm），用于水脱盐装置的热交换器。涉及以下合金: 铜或 铜合金UNS号。 金属类型 C70600 90-10铜镍 C70620 90-10铜镍 （为焊接而修改） C71500 70-30铜镍 C71520 70-30铜镍 （为焊接而修改） C71640 铜镍铁锰 C72200 铜镍合金 1.2 单位- 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。 1.3 以下安全危险警告仅适用于第节的试验方法 16 本规范中描述: 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在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 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 establishes requirements for seamless and welded copper-nickel tubes from 0.250 to 2.125 in. (6.35 to 54.0 mm) in diameter for use in heat exchangers in water desalting plants. The following alloys are involved: Copper or Copper Alloy UNS No. Type of Metal C70600 90-10 copper-nickel C70620 90-10 copper-nickel (Modified for Welding) C71500 70-30 copper-nickel C71520 70-30 copper-nickel (Modified for Welding) C71640 copper-nickel-iron-manganese C72200 copper-nickel 1.2 Units— 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. 1.3 The following safety hazard caveat pertains only to the test methods of Section 16 described in 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 establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to its use. 1.4 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.