1.1 本规范涵盖在高于或低于环境温度的非阳光直射条件下运行的管道、刚性管道和设备的隔热和隔音用硬质聚氯乙烯（PVC）护套。 1.2 本材料规范不包括阳光直射。请参阅制造商的阳光直射指南。 1.3 本规范不涉及用作隔热层上的配件盖的PVC护套。 1.4 这是一份材料规范，不包括该材料作为组件的绝缘系统，也不意味着使用这些材料安装的绝缘系统将提供第节中规定的物理特性和性能特征 7. . 1.5 本材料规范不包括刚性PVC护套的尺寸计算或安装。 1.6 以英寸磅为单位的数值应视为标准。括号中给出的值是国际单位制的数学转换，仅供参考，不被视为标准。 1.7 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.8 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 rigid polyvinyl (PVC) jacketing for thermal and acoustical insulation for pipe, rigid tubing and equipment operating at either above or below ambient temperatures in non-direct sunlight exposure. 1.2 This material specification does not cover exposure to direct sunlight. Refer to manufacturer’s guidelines for direct sunlight exposure. 1.3 This specification does not address PVC jacketing used as fitting covers over thermal insulation. 1.4 This is a material specification and does not cover insulation systems of which this material is a component, nor imply that an installed insulation system using these materials will provide the physical properties and performance characteristics specified in Section 7 . 1.5 This material specification does not cover sizing calculations or installation of rigid PVC jacketing. 1.6 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. 1.7 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. 1.8 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.