1.1 本规范涵盖了用于制造由以下材料组成的非压力管道产品的硬质塑料化合物的分类和识别: (1) 聚氯乙烯聚合物， (2) 氯化聚氯乙烯聚合物，或 (3) 氯乙烯共聚物和必要的复合成分。混合成分包括润滑剂；稳定器；非聚氯乙烯树脂改性剂；着色剂或颜料，或两者；纤维或非纤维增强；或填充物。 1.2 本规范中的要求旨在对用于制造非承压管道或管件的化合物进行质量控制。它们不适用于成品管道和成品管件。见适用的ASTM标准或成品要求。 1.3 在特殊情况下，应考虑特殊管道应用的特定化合物，这些特殊管道应用需要考虑本规范中未涵盖的其他特性，例如使用温度、耐下垂性、特殊耐化学性、耐候性、弯曲力和电气特性。 1.4 规范中涵盖了用于建筑应用（管道除外）的硬质PVC型化合物 D4216 . 1.5 本规范涵盖了通用挤出、成型、配件和管道用硬质PVC化合物 D1784 . 1.6 燃烧速率试验，试验方法 D635 ，在本规范中用作鉴定化合物某些特性的试验。 1.7 符合本规范要求的硬质PVC和CPVC回收塑料可用于某些应用中。请参阅适用产品标准“材料和制造”一节中的具体要求。 1.8 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。 1.9 以下安全危险警告仅适用于测试方法部分第节 10 ，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和健康实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于本标准。

1.1 This specification covers the classification and identification of rigid plastic compounds intended for use in making nonpressure piping products composed of (1) poly(vinyl chloride) polymer, (2) chlorinated poly(vinyl chloride) polymer, or (3) vinyl chloride copolymers, and the necessary compound ingredients. Compounding ingredients consist of lubricants; stabilizers; non-poly(vinyl chloride) resin modifiers; colorants or pigments, or both; fibrous or nonfibrous reinforcements; or fillers. 1.2 The requirements in this specification are intended for the quality control of compounds used to manufacture pipe or fittings intended for nonpressure use. They are not applicable to finished pipe and finished fittings. See the applicable ASTM standards or requirements for finished products. 1.3 In special cases, specific compounds for unusual piping applications that require consideration of other properties not covered in this specification, such as service temperature, sag resistance, special chemical resistance, weather resistance, bending forces, and electrical properties, shall be considered. 1.4 Rigid PVC-type compounds for building applications other than piping are covered in Specification D4216 . 1.5 Rigid PVC compounds for general purpose extrusion, molding, fitting, and pipe are covered in Specification D1784 . 1.6 The rate of burning test, Test Method D635 , is used in this specification as a test for identification of certain properties of the compound. 1.7 It is acceptable for rigid PVC and CPVC recycle plastics meeting the requirements of this specification to be used in some applications. Refer to the specific requirements in the Material and Manufacture section of the applicable product standard. 1.8 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only. 1.9 The following safety hazards caveat pertains only to the test methods portion, Section 10 , 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 and health practices and determine the applicability of regulatory limitations prior to use. Note 1: There is no known ISO equivalent to this standard.