1.1 本规范涉及由改性沥青或丁基橡胶密封化合物制成的柔性保护套，用于隔热。密封化合物由外表面材料覆盖。典型应用是绝缘管道、管道和设备。这些材料只能用于室外或直埋应用。 1.2 本规范涵盖的护套材料在安装后的允许暴露温度范围为–25°F至284°F（–32°C至140°C）。 1.3 本规范不涉及这种护套材料的安装方法。 1.4 以英寸表示的值- 磅单位应视为标准单位。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。 1.5 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。 1.6 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 addresses flexible protective jackets, made of a modified asphalt or butyl rubber sealing compound, for use over thermal insulation. The sealing compound is covered with an outer surface material. Typical applications are insulated ducts, pipe, and equipment. These materials shall be used only for outdoor or direct burial applications. 1.2 The jacket materials covered by this specification have an allowed exposure temperature range, after installation, from –25°F to 284°F (–32°C to 140°C). 1.3 This specification does not address installation methods of this jacketing material. 1.4 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 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.