1.1 本规程规定了一种测试方法，用于评估浓度比小于10的太阳能集热器中使用的隔热材料的性能。本文给出了评估pH值、表面燃烧特性、吸湿性、吸水性、耐热性、线性收缩（或膨胀）、热表面性能和加速老化的测试。本规程提供了表面燃烧特性的测试，但未提供确定隔热材料燃烧性能的方法。 1.2 试验应适用于太阳能集热器中使用的毯子、硬质板、松散填料和泡沫隔热材料。其他隔热材料应根据本文规定进行测试，不应排除在考虑范围之外。 1.3 假设升高的温度、湿度和施加的应力是导致太阳能集热器中使用的隔热材料劣化的主要因素。 1.4 由于绝缘材料通常不暴露于太阳辐射，因此太阳辐射不被视为一个促成因素。 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。 ====意义和用途====== 5.1 太阳能集热器中的暴露条件，尤其是在停滞条件下，可能会降低隔热材料的性能。本规程规定了一种方法，用于评估暴露在模拟运行条件下后隔热材料的劣化程度（如有）。 5.2 本规程还旨在通过对绝缘材料进行比较测试，帮助评估长期性能。 然而，实验室和实际使用条件下的性能之间的相关性尚未建立。 5.3 本规程还规定了在选择和规范隔热材料时应考虑的标准。其中一个标准是表面燃烧特性（试验方法 E84 )，许多代码官员将其用作参考。本规程并不表示以任何方式获得的数值反映了实际火灾条件下隔热的预期性能。

1.1 This practice sets forth a testing methodology for evaluating the properties of thermal insulation materials to be used in solar collectors with concentration ratios of less than 10. Tests are given herein to evaluate the pH, surface burning characteristics, moisture adsorption, water absorption, thermal resistance, linear shrinkage (or expansion), hot surface performance, and accelerated aging. This practice provides a test for surface burning characteristics but does not provide a methodology for determining combustibility performance of thermal insulation materials. 1.2 The tests shall apply to blanket, rigid board, loose-fill, and foam thermal insulation materials used in solar collectors. Other thermal insulation materials shall be tested in accordance with the provisions set forth herein and should not be excluded from consideration. 1.3 The assumption is made that elevated temperature, moisture, and applied stresses are the primary factors contributing to the degradation of thermal insulation materials used in solar collectors. 1.4 Solar radiation is not considered a contributing factor since insulating materials are not normally exposed to it. 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. ====== Significance And Use ====== 5.1 The exposure conditions in solar collectors, especially under stagnation conditions, may degrade the performance of thermal insulation materials. This practice sets forth a methodology for evaluating the degree of degradation, if any, of the thermal insulation materials after exposure to simulated in-service conditions. 5.2 This practice is also intended to aid in the assessment of long-term performance by comparative testing of insulation materials. However, correlations between performance under laboratory and actual in-service conditions have not been established. 5.3 This practice also sets forth criteria that shall be considered in the selection and specification of thermal insulation materials. One such criterion is surface burning characteristics (Test Method E84 ), which is used by many code officials as a reference. This practice does not represent that the numerical values obtained in any way reflect the anticipated performance of the thermal insulation under actual fire conditions.