1.1 本试验方法评估了标准化环境暴露后阻火材料的物理性能、化学性能或两者的变化。本试验方法不评估防火材料的防火性能。 1.2 该测试方法确定了有助于确定建筑物中测试材料使用情况的指标。 1.3 本试验方法评估防火系统内使用的组件产品的性能，而不评估组装防火系统的性能。 注1: 本试验方法不排除将整个阻火系统暴露在一个或多个严重环境暴露中，然后将整个阻火系统暴露在火灾试验中的可能性。 1.4 本试验方法旨在作为一种筛选方法，用于评估特定材料在一组标准化严重暴露标准前后的相对行为。单个测试并非评估或选择阻火材料的唯一决定因素，因为每个测试都有局限性。 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 本试验方法旨在评估暴露于一组标准化恶劣环境条件后的材料性能。 据了解，这些性能值取决于这些标准化暴露时间和环境浓度。如果暴露期或严重环境浓度或两者都发生变化，则可能出现其他值。 5.2 本试验方法适用于材料在其预期应用领域暴露于特定极端环境条件的情况。 5.3 用户应确定哪些特性与手头的应用程序相关，以确定要测试的特性。 注2: 并非所有情况下都要测试所有属性。 5.4 本试验方法旨在仅评估以下类型的材料，根据其物理性质或化学性质或两者的定义，并用于穿透防火带: 5.4.1 吸热的 5.4.2 膨胀， 5.4.3 绝缘， 5.4.4 烧蚀，以及 5.4.5 升华。 5.5 本试验方法确定初始物理性质、化学性质或两者，以便与暴露后的物理性质、化学性质或两者进行比较。 如适用，应考虑以下特性: 5.5.1 体重减轻或增加， 5.5.2 体积膨胀， 5.5.3 导热系数， 5.5.4 热重分析（TGA）， 5.5.5 差示扫描量热法（DSC）， 5.5.6 抗拉强度和伸长率， 5.5.7 视觉观察，以及 5.5.8 点火损失。 5.6 本试验方法使用以下暴露: 5.6.1 温度升高， 5.6.2 高湿度， 5.6.3 存在水分的二氧化碳和二氧化硫， 5.6.4 浸水， 5.6.5 温度循环， 5.6.6 湿-冻-干循环，以及 5.6.7 风化作用 5.7 本试验方法不提供任何关于暴露试验前后阻火器实际防火性能的信息。 5.8 该测试方法将提供配方和材料加工变化之间的比较。 5.9 本试验方法仅提供标准化暴露过程前后受试材料的比较。 5.10 本试验方法应用于评估材料或选择特定应用的防火材料。应考虑其他因素，例如根据试验方法测试的防火性能 E814 或 E119 ，根据测试方法测试的火焰蔓延 E84 、耐久性及其与相邻材料的兼容性。

1.1 This test method evaluates a change in physical properties, chemical properties, or both, of firestop materials after a standardized environmental exposure. This test method does not evaluate the fire performance of the firestop materials. 1.2 This test method establishes indicators that will aid in determining the use of the tested material in buildings. 1.3 This test method evaluates the properties of component products used within a firestop system, and does not evaluate the properties of assembled firestop systems. Note 1: This test method does not preclude the possibility of exposing complete firestop systems to one or more severe environmental exposures and then exposing the complete firestop system to a fire test. 1.4 This test method is intended to be a screening method in the evaluation of the relative behavior of a specific material before and after a standardized set of severe exposure criteria. Individual tests are not intended to be the only determining factor in evaluating or selecting a firestop material because each test has limitations. 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 This test method is intended to evaluate the material performance after exposure to a standardized set of severe environmental conditions. It is understood that these performance values are dependent upon these standardized exposure periods and environmental concentrations. Other values are possible if the exposure period or severe environmental concentration, or both, is changed. 5.2 This test method is intended to be used where the material is exposed to the specific extreme environmental condition in its intended field of application. 5.3 The user shall establish which properties are relevant to the application at hand, in order to determine the properties to be tested. Note 2: It is not intended for all properties to be tested in all cases. 5.4 This test method is intended to evaluate only the following types of materials, as defined by their physical properties or chemical properties, or both, and used in penetration firestops: 5.4.1 Endothermic, 5.4.2 Intumescent, 5.4.3 Insulative, 5.4.4 Ablative, and 5.4.5 Subliming. 5.5 This test method determines initial physical properties, chemical properties, or both, to allow comparison with physical properties, chemical properties, or both after exposure. The following properties are to be considered, as applicable: 5.5.1 Weight loss or gain, 5.5.2 Volume expansion, 5.5.3 Thermal conductivity, 5.5.4 Thermogravimetric analysis (TGA), 5.5.5 Differential scanning calorimetry (DSC), 5.5.6 Tensile strength and elongation, 5.5.7 Visual observations, and 5.5.8 Loss on ignition. 5.6 This test method uses the following exposures: 5.6.1 Elevated temperature, 5.6.2 High humidity, 5.6.3 Carbon dioxide and sulfur dioxide with moisture present, 5.6.4 Water immersion, 5.6.5 Temperature cycling, 5.6.6 Wet-freeze-dry cycling, and 5.6.7 Weathering. 5.7 This test method does not provide any information regarding the actual fire performance of the firestop before or after the exposure tests. 5.8 This test method will provide a comparison between formula and processing changes in materials. 5.9 This test method only provides for a comparison of the tested material before and after a standardized exposure process. 5.10 This test method shall be used as one element in evaluating materials or selecting firestop material(s) for a specific application. Other factors shall be considered, such as its fire performance as tested in accordance with Test Methods E814 or E119 , flame spread as tested in accordance with Test Method E84 , durability, and its compatibility with its adjacent materials.