1.1 本说明书涵盖了由共挤出模具系统生产的用于非压力重力流排水废料或通风口(DWV)服务、或塑料下排水服务、或电气或通信导管服务的共挤出复合管，其中同心层在离开模具之前形成并组合。 1.1.1 本规范的功能是提供产品的标准化，产生技术数据，并作为购买指南。 1.2 不符合材料部分要求的化合物除外。 1.3 共挤出复合管可以按照任何规定的标准或根据买方和供应商之间的协议进行穿孔。 1.4 根据任何规定的标准或根据买方和供应商之间的协议，允许共挤出复合管通过溶剂胶结连接或通过弹性密封件（垫圈）连接。1.5 中列出了有关存储、连接、安装和原理的建议 附录X1 , 附录X2 , 附录X3 ，和 附录X4 ，分别。 1.6 以英寸磅为单位的数值应被视为标准值。本标准不包括其他计量单位。 1.7 本说明书的文本引用了提供解释性材料的注释、脚注和附录。这些注释和脚注（不包括表格和图中的注释和脚注）不应被视为本规范的要求。 1.8 本标准无意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，并确定法规限制的适用性。附注1: 相关规格如下: D2661 , D2665 , D2729 , D2949 , D3034 , F512 , F628 , F758 ，和 F891 . 1.9 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 coextruded composite pipe, intended for non-pressure gravity flow drain waste or vent (DWV) service, or plastic underdrain service, or electrical or comunications conduit service produced by a coextrusion die system, in which the concentric layers are formed and combined before exiting the die. 1.1.1 The function of this specification is to provide standardization of product, to produce technical data, and to serve as a purchasing guide. 1.2 Compounds that do not meet the requirements of the material section are excluded. 1.3 The coextruded composite pipe is allowed to be perforated in accordance with any specified standard or by agreement between the purchaser and the supplier. 1.4 The coextruded composite pipe is allowed to be belled for joining by solvent cementing or belled for joining by an elastomeric seal (gaskets), in accordance with any specified standard or by agreement between the purchaser and the supplier. 1.5 Recommendations for storage, joining, installation, and rationale are listed in Appendix X1 , Appendix X2 , Appendix X3 , and Appendix X4 , respectively. 1.6 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 The text of this specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of this specification. 1.8 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 1: Related specifications are as follows: D2661 , D2665 , D2729 , D2949 , D3034 , F512 , F628 , F758 , and F891 . 1.9 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.