与ISO 11298-1一起阅读的ISO 11298-2:2018规定了管道和配件的要求和试验方法，这些管道和配件是塑料管道系统的一部分，在地下供水网络改造中作为连续管道安装。适用于三种不同类型的PE管: -PE实心壁单层管（公称外径dn），包括任何识别条纹； -按照附录A的规定，管道内外各有一层或两层共挤出层的PE管（总外径，dn），其中所有层具有相同的MRS等级； -聚乙烯涂层管道（外径，dn），管道外部有可剥离、连续的热塑性附加层（“涂层管道”）； 见附件A。 此外，ISO 11298-2:2018涵盖 -通过对接熔合方式连接管道长度，以及 -聚乙烯制成的预制和注塑配件。 ISO 11298-2:2018适用于拟在20°C的工作温度下作为参考温度使用的PE管、配件和组件。 注:对于在高于20°C和高达40°C的恒定温度下运行的应用，见ISO 4427-1:2007，附录A。

ISO 11298-2:2018, read in conjunction with ISO 11298-1, specifies requirements and test methods for pipes and fittings which are part of plastics piping systems installed as continuous pipes in the renovation of underground water supply networks. It is applicable to PE pipes of three different types: - PE solid wall single layered pipes (nominal outside diameter, dn), including any identification stripes; - PE pipes with co-extruded layers on either or both the outside and inside of the pipe (total outside diameter, dn), as specified in Annex A, where all layers have the same MRS rating; - PE coated pipes (outside diameter, dn) having a peelable, contiguous, thermoplastics additional layer on the outside of the pipe ("coated pipe"); see Annex A. In addition, ISO 11298-2:2018 covers - jointing of pipe lengths by means of butt fusion, and - fabricated and injection-moulded fittings made of PE. ISO 11298-2:2018 is applicable to PE pipes, fittings and assemblies intended to be used at an operating temperature of 20 °C as the reference temperature. NOTE For applications operating at constant temperatures greater than 20 °C and up to 40 °C, see ISO 4427-1:2007, Annex A.