ISO 22391-2:2009规定了由耐高温聚乙烯（PE-RT）、I型和耐高温聚乙烯（PE-RT）、II型制成的管道的特性，这些管道拟用于建筑物内的热水和冷水输送装置，无论水是否用于人类消费（家用系统）和供暖系统，根据ISO 22391-1，在适用于应用类别的设计压力和温度下。 ISO 22391-2:2009涵盖了一系列使用条件（应用等级）、设计压力和管道尺寸等级，并规定了试验参数和试验方法。当与ISO 22391的其他部分一起使用时，它适用于PE- RT管道、配件及其接头，以及具有PE-RT组件的接头，以及分别用于热水和冷水装置的其他塑料和非塑料材料的接头。 适用于有或无阻挡层的管道。

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.