1.1 本规范涵盖了根据单元分类系统对聚乙烯塑料管和配件材料的标识。本规范的功能不是为设计目的提供特定的工程数据，指定制造公差，或确定特定应用的适用性。 1.1.1 根据本标准分类的一些塑料管和配件PE化合物作为基材出售，然后由管道或配件制造商在生产最终产品之前或期间与其他材料（例如颜色或添加剂浓缩物）组合成最终的分类化合物。本标准不包括表1、性能5和6的要求，以及 6.1.1 ，可用于根据以下要求对进料基材进行性能验证 8.1 . 1.1.2 如果PE化合物作为标准分类的化合物出售，请参见 8.1 关于即将到来的机密化合物的属性验证。 1.1.3 静水压强度分类（属性6）的单元分类值不是“0”的化合物依赖于定义的配方。所定义制剂的组成可以从制剂所有者处获得。 注1: 与规定公式的偏差可能会影响静水压强度分类。 1.2 聚乙烯塑料材料是热塑性塑料，可以再加工和回收( 附注3 ). 本规范允许使用这些聚乙烯材料，前提是满足本规范的所有具体要求。 注2: 本规范中的注释仅供参考，不应被视为本规范的一部分。 注3: 请参阅指南 D5033 有关再生塑料的信息和定义。 1.3 以国际单位制表示的值应被视为标准值。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如果有的话）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 注4: 目前还没有与该标准等效的ISO。 1.5 有关模塑和挤压材料的信息，请参阅规范 D4976 有关电线和电缆材料的信息，请参阅规范 D1248 . 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification covers the identification of polyethylene plastic pipe and fittings materials in accordance with a cell classification system. It is not the function of this specification to provide specific engineering data for design purposes, to specify manufacturing tolerances, or to determine suitability for use for a specific application. 1.1.1 Some plastic pipe and fitting PE compounds classified by this standard are sold as a base material and then combined with other material(s) (for example, color or additive concentrate) by the pipe or fitting manufacturer into a final classified compound either prior to or during production of the final article. This standard, excluding the requirements of Table 1, properties 5 and 6, and 6.1.1 , can be used for property verification of the incoming base material(s) in accordance with 8.1 . 1.1.2 In the case of PE compounds sold as the compound classified by the standard, see 8.1 regarding property verification of the incoming classified compound. 1.1.3 Compounds with a cell classification value other than ‘0’ for the Hydrostatic Strength Classification (property 6) rely on a defined formulation. The composition of the defined formulation can be obtained from the owner of the formulation. Note 1: Deviations from the defined formulation may affect the Hydrostatic Strength Classification. 1.2 Polyethylene plastic materials, being thermoplastic, are reprocessable and recyclable ( Note 3 ). This specification allows for the use of those polyethylene materials, provided that all specific requirements of this specification are met. Note 2: The notes in this specification are for information only and shall not be considered part of this specification. Note 3: See Guide D5033 for information and definitions related to recycled plastics. 1.3 The values stated in SI units are to be regarded as standard. 1.4 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 4: There is no known ISO equivalent to this standard. 1.5 For information regarding molding and extrusion materials see Specification D4976 . For information regarding wire and cable materials see Specification D1248 . 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.