ISO 22391-5:2009规定了耐高温聚乙烯（PE-RT），耐高温聚乙烯（PE-RT），II型聚乙烯管道系统的适用性用于建筑物内的热水和冷水装置，用于运输水，无论水是否用于人类消费（家庭系统）和供暖系统，在符合ISO 22391标准的适用类别的设计压力和温度下-1。 ISO 22391-5:2009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。结合ISO 22391的其他部分，适用于PE-RT管，配件，接头以及具有PE-RT以及其他塑料和非塑料材料部件的接头，分别用于热和冷水装置

ISO 22391-5:2009 specifies the characteristics of the fitness for purpose 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 the design pressures and temperatures appropriate to the class of application according to ISO 22391-1. ISO 22391-5:2009 covers a range of service conditions (classes of application), design pressures and pipe dimension classes, and also specifies test parameters and test methods. 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.