1.1 本规范涵盖了通常用于输送冷热流体的柔性预绝缘塑料管道系统，包括配备塑料输送管、隔热层和作为集成系统制造的外护套的管道系统，以及以线圈或直线长度供应的管道系统。包括粘合和非粘合绝缘类型。包括材料、工艺、尺寸和端部密封测试的要求和测试方法。还给出了标记要求。本规范涵盖的组件适用于但不限于住宅和商业、- 以及冷饮用水分配系统、再生水、消防、市政供水管线、建筑供水管线、辐射供暖和制冷系统、水力分配系统、冰雪融化系统、地热地面回路、区域供暖、草坪调节、压缩空气分配和建筑服务管道，前提是本文涵盖的输送管或管道符合适用的规范要求。 注1: 本规范涵盖的管道不建议用于室内易燃气体应用。 1.2 管道系统可以包括公共外护套内的一个或多个输送管。 1.3 本规范的文本引用了提供解释性材料的注释和脚注。这些注释和脚注（不包括表格和图表中的注释和脚注）不应被视为本标准的一部分。 注2: 本规范涵盖的预绝缘管道通常安装在地下埋地应用中。 1.4 单位-- 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.5 以下安全隐患警告与测试方法部分第节有关 7. ，本规范。 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并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》中确立的国际公认的标准化原则制定的。

1.1 This specification covers flexible, pre-insulated plastic piping systems commonly used to convey hot and cold fluids, including piping systems that are supplied complete with plastic carrier pipe, thermal insulation, and outer jacket manufactured as an integrated system, and are supplied in a coil or as a straight length. Both bonded and non-bonded insulation types are included. Included are requirements and test methods for material, workmanship, dimensions, and endseal testing. Requirements for markings are also given. The components covered by this specification are intended for use in, but not limited to, residential and commercial, hot- and cold-potable water distribution systems, reclaimed water, fire protection, municipal water service lines, building supply lines, radiant heating and cooling systems, hydronic distribution systems, snow and ice melting systems, geothermal ground loops, district heating, turf conditioning, compressed air distribution and building services pipe, provided that the carrier pipe or tubing covered herein complies with applicable code requirements. Note 1: Piping covered by this specification is not recommended for use in indoor flammable gas applications. 1.2 Piping systems may include one or more carrier pipes within a common outer jacket. 1.3 The text of this specification references notes and footnotes that provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered part of this standard. Note 2: Pre-insulated pipes covered by this specification are typically installed underground in buried applications. 1.4 Units— 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 to the test methods portion, Section 7 , 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 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.