1.1 本规范规定了用于高压空调或制冷机组的热交换器和连接管路的无缝铜铁管的要求。 1.2 管子应由以下铜合金制成: 铜UNS编号。 C19400元 1.3 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。 1.4 以下安全警告仅适用于本规范中所述的试验方法: 1.4.1 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。 1.5 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 establishes the requirements for seamless copper iron tube intended for use in heat exchangers and connection lines of high-pressure air conditioning or refrigeration units. 1.2 The tube shall be produced from the following copper alloy: Copper UNS No. C19400 1.3 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. 1.4 The following safety caveat pertains only to the test method(s) described in this specification: 1.4.1 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. 1.5 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.