本文件与ISO 21138-2和ISO 21138-3一起，规定了基于未增塑聚氯乙烯（PVC-U）、聚丙烯（PP）和聚乙烯（PE）结构壁管道系统的管道、配件和系统的定义和要求，这些管道、配件和系统拟用于无压地下排水和排污应用。 注1:符合本文件要求的管道、配件和系统也可用于公路排水和地表水。 本文件涵盖了一系列管道和管件尺寸、材料、管道结构、标称环刚度，并给出了有关颜色的建议。 注2:考虑到买方或规范的特殊要求和安装实践或规范，买方或规范人员有责任从这些方面做出适当选择。 结合ISO 21138-2和ISO 21138-3，本文件适用于结构化- 壁管和配件，其接头以及与其他塑料和非塑料材料部件的接头。 它适用于带或不带带弹性环密封接头的整体套筒以及焊接和熔合接头的结构化壁管和管件。 注3:当符合ISO 21138-2和ISO 21138-3中给出的接头尺寸要求以及第9条中给出的性能要求时，符合参考文献中提及的任何塑料产品标准的管道、配件和其他部件可与符合本文件的管道和配件一起使用。 注4:对于大于DN/OD 1200或DN/ID 1200的尺寸，本文件可作为有关外观、颜色、物理和机械特性以及性能要求的一般指南。

This document, together with ISO 21138？2 and ISO 21138？3, specifies the definitions and requirements for pipes, fittings and systems based on unplasticized poly(vinyl chloride) (PVC-U), polypropylene (PP) and polyethylene (PE) structured-wall piping systems intended to be used in non-pressure underground drainage and sewerage applications. NOTE 1 Pipes, fittings and the system complying with this document can also be used for highway drainage and surface water. This document covers a range of pipe and fitting sizes, materials, pipe constructions, nominal ring stiffnesses, and gives recommendations concerning colours. NOTE 2 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and installation practices or codes. In conjunction with ISO 21138？2 and ISO 21138？3, this document is applicable to structured-wall pipes and fittings, to their joints and to joints with components of other plastics and non-plastics materials. It is applicable to structured-wall pipes and fittings with or without an integral socket with elastomeric ring seal joints as well as welded and fused joints. NOTE 3 Pipes, fittings and other components conforming to any plastics product standards referred to in the Bibliography can be used with pipes and fittings conforming to this document when they conform to the requirements for joint dimensions given in ISO 21138-2 and ISO 21138-3 and to the performance requirements given in Clause 9. NOTE 4 For dimensions larger than DN/OD 1200 or DN/ID 1200, this document can serve as a general guideline regarding appearance, colour, physical and mechanical characteristics as well as performance requirements.