用于供应气体燃料的塑料管道系统

[中文适用范围]： 本文件规定了由聚乙烯 (PE) 制成的热熔配件以及用于气体燃料供应领域管道系统的机械配件的特性。它还规定了本文件中引用的测试方法的测试参数。与 ISO 4437-1、ISO 4437-2、ISO 4437-4 和 ISO 4437-5 结合，本文件适用于 PE 管道、配件和阀门、其接头以及带有 PE 和其他材料部件的接头，这些接头旨在在以下条件下使用：a) 最大工作压力 (MOP)，高达 10 bar1)，设计时的参考温度为 20°C；b) 工作温度在 −20°C 和 40°C 之间。对于 20°C 至 40°C 之间的工作温度，降额系数在 ISO 4437-5 中定义。颜色。购买者或指定者有责任从这些方面做出适当的选择，同时考虑到他们的特殊要求以及任何相关的国家法规和安装实践或规范。本文件适用于以下类型的配件： — 电熔承插接头； — 电熔鞍形接头； — 插口端接头（用于使用加热工具和电熔承插熔接的对接熔接）； — 承插熔接接头； — 机械配件。注 1 配件可以是例如耦合器、鞍形接头、等径和缩径三通、缩径器、弯头、弯头或端盖的形式。注 2 除非尺寸较大或没有其他解决方案，否则通常不将预制配件用于气体应用。指导可以在 ISO 4427-3:2019，附件 B 中找到。1) 1 巴 = 0.1 兆帕 = 105 帕；1 兆帕 = 1 牛顿/平方毫米。1  [外文原描述]： This document specifies the characteristics of fusion fittings made from polyethylene (PE) as well as of mechanical fittings for piping systems in the field of the supply of gaseous fuels. It also specifies the test parameters for the test methods referred to in this document. In conjunction with ISO 4437-1, ISO 4437-2, ISO 4437-4 and ISO 4437-5, 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 ISO 4437-5. The ISO 4437 series covers a range of maximum operating pressures and gives requirements concerning colours. 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. This document is applicable for fittings of the following types: — electrofusion socket fittings; — electrofusion saddle fittings; — spigot end fittings (for butt fusion using heated tools and electrofusion socket fusion); — socket fusion fittings; — mechanical fittings. NOTE 1 The fittings can be, for example, in the form of couplers, saddles, equal and reduced tees, reducers, elbows, bends or end caps. NOTE 2 Fabricated fittings are normally not used for gas applications except for larger dimensions or in the absence of other solutions. Guidance can be found in ISO 4427-3:2019, Annex B. [1] 1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm 2 .