本文件规定了用于供水和埋地排水、污水处理、处理废水和压力下灌溉或地面上避免阳光直射的管道系统的实心壁定向未增塑聚氯乙烯（PVC-O）管件的特性。本文件的范围仅限于双套筒、维修联轴器、异径管和非端承载弯头。注1:本文件的范围仅限于编制本文件期间市场上的配件。因此，三通、法兰适配器等不包括在本标准版本中。 注2:对于双套筒、维修联轴器和异径管，端部无特殊配件设计- 承重应用。然而，约束垫片可用于端部承载应用。在这种情况下，EN 17176-5的要求适用。 它还规定了本文件中提及的测试方法的测试参数。结合EN 17176-1和EN 17176-5，本文件适用于用于以下用途的定向PVC-O管件:a）水管和服务管线；b） 建筑物内外的输水；c） 加压排水、排污和处理废水；d） 加压灌溉。 本文件适用于最大允许工作压力（PFA）不超过25 bar1的供水管道系统。 根据本文件，管道系统旨在输送高达45°C（含45°C）的冷水，尤其是在需要特殊性能要求的应用中，如冲击载荷和压力波动。对于25°C和45°C之间的温度，EN 17176-2:2019，图C.1适用。 本文件规定了一系列配件尺寸和压力等级，并给出了有关颜色的要求和建议。 注3:买方或指定人有责任从这些方面做出适当选择，同时考虑其特殊要求和任何相关国家法规和安装实践或规范。

This document specifies the characteristics of solid-wall oriented unplasticized poly(vinyl chloride) (PVC-O) fittings for piping systems intended for water supply and for buried drainage, sewerage, treated waste water and irrigation under pressure or above-ground where protected from direct sunlight. The scope of this document is limited to double sockets, repair couplings, reducers and to non-end load bearing elbows.NOTE 1 The scope of this document is restricted to fittings on the market during the preparation of this document. Therefore, tees, flange adaptors, etc., are excluded from this version of the standard. NOTE 2 For double sockets, repair couplings and reducers there are no special fittings designs for end-load bearing applications. However, restrained gaskets can be used for end-load bearing applications. In that case, the requirements of EN 17176-5 are applicable. It also specifies the test parameters for the test methods referred to in this document.In conjunction with EN 17176-1 and EN 17176-5, this document is applicable to oriented PVC-O fittings intended to be used for the following:a) water mains and services lines;b) conveyance of water for both outside and inside buildings;c) drainage, sewerage and treated waste water under pressure;d) irrigation under pressure. This document is applicable to piping systems intended for the supply of water with a maximum allowable operating pressure (PFA) up to and including 25 bar1. The piping system according to this document is intended for the conveyance of cold water up to and including 45 °C and especially in those applications where special performance requirements are needed, such as impact loads and pressure fluctuations. For temperatures between 25 °C and 45 °C, EN 17176-2:2019, Figure C.1 applies. This document specifies a range of fittings sizes and pressure classes and gives a requirement and recommendations concerning colours. NOTE 3 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects, taking into account their particular requirements and any relevant national regulations and installation practices or codes.