1.1 本规程提供了绝缘蒸汽缓凝剂系统中所用类型的压敏粘合剂（PSA）密封接头试样的制备说明，用于按照试验方法进行后续试验 E96/E96M 确定这些接缝的水蒸汽渗透性（“渗透性”）。它不包括其他类型接头的准备。 1.2 本规程规定了与试验方法一起发布的报告的内容要求 E96/E96M 测试这些接头。 1.3 接头由工厂涂覆的PSA胶带或PSA涂覆的层压板护套（蒸汽缓凝剂包层）材料制成。 1.3.1 待测试的材料和接头类型通常出现在商业和工业绝缘应用的机械系统中，以及HVAC系统绝缘中。 1.3.2 用于机械绝缘的蒸汽缓速器系统中的典型PSA接头包括: 1.3.2.1 用双面胶带重叠。 1.3.2.2 与涂层层压板护套重叠。 1.3.2.3 与单面绝缘胶带对接。 1.3.2.4 搭接和对接的交点。 1.4 试验方法 E96/E96M 对于本文提供的指导范围以外的特定测试说明，即在所需测试配置中制备样本后，应遵循。 1.5 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。 1.6 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。 1.7 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====== 5.1 PSA接头是绝缘蒸汽缓凝剂系统的必要和关键部件，除了了解所用蒸汽缓凝剂的渗透性外，还需要评估接头的渗透性，以指示系统的预期性能。 5.2 试验方法 E96/E96M 不包括准备多件组件（如PSA接头）的具体说明。本实践提供了这些说明。 5.3 制作psa接头涉及许多变量，在样本制备和数据报告中需要考虑这些变量。这些变量包括: 5.3.1 施加压力密封接头的方法， 5.3.2 施加的压力量， 5.3.3 试验前的停留时间， 5.3.4 准备接缝的背衬表面， 5.3.5 试样制备的环境条件， 5.3.6 材料尺寸， 5.3.7 接头的配置， 5.3.8 盘子大小， 5.3.9 试样的试验区域，以及 5.3.10 接缝面积。 5.4 现场安装的接头不太可能达到实验室制备的密封效果。现场安装通常涉及极端的环境条件、表面污染、有限的空间、不同的管道半径、不同的施加压力以及底座绝缘密度和刚度的变化。 5.4.1 通过应用本规程和试验方法获得的结果 E96/E96M 最好用于比较材料和配置。敦促不要将实际现场表现与实验室环境中获得的结果等同起来。

1.1 This practice provides instruction for the preparation of test specimens of pressure sensitive adhesive (PSA) sealed joints of the type employed in insulation vapor retarder systems, for subsequent testing per Test Methods E96/E96M to determine the water vapor permeance (“permeance”) of those joints. It does not cover preparation of other types of joints. 1.2 This practice provides requirements for the content of reports issued in conjunction with Test Methods E96/E96M testing of these joints. 1.3 Joints are made with factory coated PSA tapes or PSA coated laminate jacket (vapor retarder cladding) materials. 1.3.1 The types of materials and joints to be tested are generally encountered in mechanical systems in commercial and industrial insulation applications, and in HVAC systems insulation. 1.3.2 Typical PSA joints that are employed in vapor retarder systems for mechanical insulation include: 1.3.2.1 Overlap with double-sided tape. 1.3.2.2 Overlap with coated laminate jacket. 1.3.2.3 Butt with single-sided insulation tape. 1.3.2.4 Intersection of overlap and butt joint. 1.4 Test Methods E96/E96M are to be followed for specific testing instruction beyond the areas of guidance provided herein, that is, after the specimens are prepared in the desired test configuration. 1.5 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. 1.6 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. 1.7 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 ====== 5.1 PSA joints are a necessary and critical component of an insulation vapor retarder system and, in addition to knowing the permeance of the vapor retarder being used, assessing the permeance of the joints is necessary to indicate the expected performance of the system. 5.2 Test Methods E96/E96M do not include instructions specific to preparing multiple-piece assemblies such as PSA joints. This practice provides those instructions. 5.3 There are a number of variables involved in making a psa joint, and those need to be considered in specimen preparation and data reporting. Such variables include: 5.3.1 Means of applying pressure to seal the joint, 5.3.2 Amount of pressure applied, 5.3.3 Dwell time prior to test, 5.3.4 Backing surface upon which joint is prepared, 5.3.5 Ambient conditions for specimen preparation, 5.3.6 Dimensions of materials, 5.3.7 Configuration of joint, 5.3.8 Dish size, 5.3.9 Test area of specimen, and 5.3.10 Area of joint. 5.4 It is not likely that field-installed joints will achieve as good a seal as those prepared in the laboratory. Field installations often involve extremes in ambient conditions, surface contamination, limited space, varying pipe radii, varying pressure applied, and variation in base insulation density and rigidity. 5.4.1 Results obtained through application of this practice and Test Methods E96/E96M are best used to compare materials and configurations. It is urged not to equate actual field performance with the results obtained in a laboratory setting.