用于供应气体燃料的塑料管道系统

[中文适用范围]： 本文件规定了在气体燃料供应领域组装聚乙烯 (PE) 管道系统的适用性要求。它规定了电熔、承插熔接、对接熔接和机械接头的要求。它规定了试件接头的准备方法以及为评估系统在正常和极端条件下的适用性而对这些接头进行的测试。它规定了本文件中提及的测试方法的测试参数。本文件仅供产品制造商和测试实验室使用，以根据 ISO 4437-2、ISO 4437-3 和 ISO 4437-4 评估组件在按照本文件在正常和极端条件下连接在一起时的性能。它不适用于管道系统的现场测试。本文件与 ISO 4437-1、ISO 4437-2、ISO 4437-3 和 ISO 4437-4 结合，适用于 PE 管道、管件和阀门、其接头以及带有 PE 和其他材料部件的接头，这些部件拟在以下条件下使用：a) 最大工作压力 (MOP)，最高可达 10 bar1)，设计参考温度为 20 °C；b) 工作温度在 −20 °C 至 40 °C 之间。对于 20 °C 至 40 °C 之间的工作温度，降额系数定义在附录 A 中。 [外文原描述]： This document specifies the requirements of fitness for purpose of assembled polyethylene (PE) piping systems in the field of the supply of gaseous fuels. It specifies the requirements for electrofusion, socket fusion, butt fusion and mechanical joints. It specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions. It specifies the test parameters for the test methods referred to in this document. This document is intended to be used only by the product manufacturer and test laboratories to assess the performance of components in accordance with ISO 4437-2, ISO 4437-3 and ISO 4437-4 when joined together under normal and extreme conditions in accordance with this document. It is not intended for on-site testing of pipe systems. In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-3 and ISO 4437-4, this document is applicable to PE pipes, fittings and valves, their joints, and joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure (MOP), up to and including 10 bar [1] , at a reference temperature of 20 °C for design purposes; b) an operating temperature between −20 °C and 40 °C. For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in Annex A. The ISO 4437 series covers a range of MOPs and gives requirements concerning colours. [1] 1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm 2 .