1.1 本试验方法包括目视测定根据规范分类的材料的柔性水蒸汽缓凝剂的热完整性 C1136 ，包括塑料、箔或纸以及其中两种或两种以上材料的复合材料，达到规范或采购合同中列出的温度。蒸汽缓凝剂的使用温度为 −20至150°F(−29至66°C）。本试验方法不包括以液体形式应用的胶粘剂或阻隔涂层，或用作防风雨层的材料。 1.2 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。 1.3 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。 ====意义和用途====== 4.1 在许多应用中，隔热层上使用的蒸汽缓凝剂将暴露在表1中列出的温度下 7.2 . 在这些条件下，缓凝剂的开裂或分层在大多数情况下会导致其失去作为蒸汽缓凝剂材料的有效性。

1.1 This test method covers the visual determination of the thermal integrity of flexible water vapor retarders for those materials classified under Specification C1136 , including plastic, foil, or paper and composites of two or more of these materials to temperatures listed in the specification or purchase contract. The vapor retarders are intended for use at temperatures of −20 to 150°F (−29 to 66°C). This test method does not cover mastics or barrier coatings applied in liquid form or materials intended for use as weather barriers. 1.2 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. 1.3 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. ====== Significance And Use ====== 4.1 In many applications, the vapor retarders used on a thermal insulation will be exposed to the temperatures listed in 7.2 . Cracking or delamination of the retarder under these conditions would, in most cases, cause it to lose its effectiveness as a vapor retarder material.