1.1 本规范涵盖由聚氯乙烯、氯化聚氯乙烯、氯乙烯共聚物或氯乙烯混合物组成的硬质塑料PVC和CPVC外部化合物，以及用于制造建筑产品的必要化合物成分。复合成分允许由润滑剂、稳定剂、非聚（氯乙烯）树脂改性剂、着色剂或颜料或两者以及无机填料组成。 1.2 本规范旨在提供用于制造PVC和CPVC外部建筑产品的基本化合物的分类。可以通过评估任何颜色的化合物来确定物理性质。 注1: 建议对新化合物和新应用化合物的所有颜色进行为期两年的风化研究，对颜色变化和物理性质变化没有具体要求，以提供生产商和买方就化合物适用于预期应用达成一致的基础。 1.3 本规范中的要求旨在对用于制造建筑产品的化合物进行鉴定和质量控制。它们不适用于建筑成品。 1.4 在特殊情况下，有必要为需要考虑本规范未涵盖的其他特性的特殊应用选择特定化合物。 1.5 燃烧速率试验，试验方法 D635 ，在本规范中仅用作识别PVC化合物某些特性的筛选试验；该化合物没有易燃性测试或易燃性要求。 1.6 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考。 1.7 以下安全危险警告仅适用于测试方法部分第节 11 ，本规范: 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。 注2: 没有已知的ISO等效于本标准。 1.8 本标准的文本引用了注释和脚注，这些注释和脚注提供了解释性材料。这些注释和脚注（不包括表和图中的注释和脚注）不应视为本标准的要求。 1.9 符合本规范要求的硬质PVC回收塑料可能在某些应用中可用。请参阅适用产品标准“材料和制造”一节中的具体要求。 1.10 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 covers rigid plastic PVC and CPVC Exterior compounds composed of poly(vinyl chloride), chlorinated poly(vinyl chloride), vinyl chloride copolymers or vinyl chloride blends, and the necessary compound ingredients intended for use in making building products. The compounding ingredients are permitted to consist of lubricants, stabilizers, nonpoly(vinyl chloride) resin modifiers, colorants or pigments, or both, and inorganic fillers. 1.2 This specification is intended to provide classification of base compounds used to manufacture PVC and CPVC exterior building products. It is acceptable to determine physical properties by evaluating compounds of any color. Note 1: Two year weathering studies, without specific requirements for color change and physical property change, are recommended for all colors of new compounds and compounds for new applications to provide the basis for agreement between producer and buyer on the suitability of the compound for the intended application. 1.3 The requirements in this specification are intended for qualification, as well as for quality control of compounds used to manufacture building products. They are not applicable to finished building products. 1.4 It will be necessary, in special cases, to select specific compounds for unusual applications that require consideration of other properties not covered in this specification. 1.5 The rate of burning test, Test Method D635 , is used in this specification only as a screening test for identification of certain properties of the PVC compound; there is no flammability test or flammability requirement for the compound. 1.6 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.7 The following safety hazards caveat pertains only to the test methods portion, Section 11 , of this specification: 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. Note 2: There is no known ISO equivalent to this standard. 1.8 The text of this standard references notes and footnotes, which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this standard. 1.9 It is possible that rigid PVC recycle plastic meeting the requirements of this specification will be usable in some applications. Refer to the specific requirements in the Materials and Manufacture Section of the applicable product standard. 1.10 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.