ISO 22391-1:2009规定了耐高温聚乙烯（PE-RT），耐高温聚乙烯（PE-RT），类型II的热塑性聚乙烯管道系统的一般特性，建筑物内的用于运输水的冷水设施，无论水是否用于人类消费（家庭系统）和供暖系统，在适用于适用类别的规定设计压力和温度下。 ISO 22391-1:2009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，并且还规定了测试参数并定义了术语。结合ISO 22391的其他部分，适用于PE-RT管，配件，接头和具有PE-RT部件的接头以及其他分别用于热的塑料和非塑料材料的接头和冷水装置

ISO 22391-1:2009 specifies the general characteristics of piping systems 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 specified design pressures and temperatures appropriate to the class of application. ISO 22391-1:2009 covers a range of service conditions (classes of application), design pressures and pipe dimension classes, and also specifies test parameters and defines terms. 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.