1.1 本规范规定了适用于一般工程目的的无缝铜镍管和直管的要求。涉及的合金为铜合金UNS编号C70400、C70600、C70620、C71000、C71500、C71520和C72200。 1.1.1 铜合金UNS编号C70620和C71520用于随后焊接的产品。 1.2 单位- 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。在本文中，国际单位制显示在括号中。 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。合并两个系统的值可能会导致不符合规范。 1.3 以下安全危险警告仅适用于本规范中所述的试验方法: 1.3.1 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 the requirements for seamless copper-nickel pipe and tube in straight lengths, suitable for general engineering purposes. The alloys involved are copper alloys UNS Nos. C70400, C70600, C70620, C71000, C71500, C71520, and C72200. 1.1.1 Copper alloys UNS Nos. C70620 and C71520 are intended for product that will be subsequently welded. 1.2 Units— Values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, SI units are shown in brackets. 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 specification. 1.3 The following safety hazard caveat pertains only to the test methods described in this specification: 1.3.1 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 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.