ISO 22391-2:2009规定了用于冷热水设施的耐高温聚乙烯（PE-RT），I型和耐高温聚乙烯（PE-RT），II型的特性在符合ISO 22391-1标准的适用类别的设计压力和温度范围内，无论水是否用于人类消费（家庭系统）和供暖系统，建筑物内的水是否运输。 ISO 22391-2:2009涵盖了一系列服务条件（应用类别），设计压力和管道尺寸等级，还规定了测试参数和测试方法。当与ISO 22391的其他部分一起使用时，它分别适用于PE-RT管，配件，接头以及具有PE-RT部件以及其他塑料和非塑料材料的接头，用于冷热水设施。 适用于具有或不具有阻挡层或多层的管道

ISO 22391-2:2009 specifies the characteristics of pipe made of polyethylene of raised temperature resistance (PE-RT), Type I and polyethylene of raised temperature resistance (PE-RT), Type II intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not the water is intended for human consumption (domestic systems) and for heating systems, under the design pressures and temperatures appropriate to the class of application according to ISO 22391-1. ISO 22391-2:2009 covers a range of service conditions (classes of application), design pressures and pipe dimension classes, and also specifies test parameters and test methods. When used in conjunction with the other parts of ISO 22391, it is applicable to PE-RT pipes, fittings, their joints, and to joints having components of PE-RT, as well as of other plastics and non-plastics materials, respectively, used for hot and cold water installations. It is applicable to pipes with or without a barrier layer or layers.