用于供应气体燃料的塑料管道系统

[中文适用范围]： 本文件规定了用于气体燃料供应领域管道系统的聚乙烯 (PE) 管道的特性。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 4437-3、ISO 4437-4 和 ISO 4437-5 结合，本文件适用于 PE 管道、配件和阀门、它们的接头以及带有 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。本文件适用于三种类型的管道：— PE 管道（外径，dn），包括任何识别条； — 按照附录 A 的规定，在管道外侧和/或内侧或两侧具有共挤层的 PE 管（总外径，dn），其中所有 PE 层均具有相同的 MRS 等级； — 按照附录 B 的规定，在管道外侧具有可剥离的连续热塑性塑料附加层（“涂层管”）的 PE 管（外径，dn）。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定要求以及任何相关的国家法规和安装实践或规范。 [外文原描述]： This document specifies the characteristics of pipes made from polyethylene (PE) 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 4437-3, 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 MOPs and gives requirements concerning colours. This document is applicable to three types of pipes: — PE pipes (outside diameter, d n ) including any identification stripes; — PE pipes with co-extruded layers on either or both the outside and/or inside of the pipe (total outside diameter, d n ) as specified in Annex A, where all PE layers have the same MRS rating; — PE pipes (outside diameter, d n ) with a peelable and contiguous thermoplastics additional layer on the outside of the pipe ("coated pipe") as specified in Annex B. 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. [1] 1 bar = 0,1 MPa = 10 5 Pa; 1 MPa = 1 N/mm 2 .