ISO 15874的本部分规定了用于建筑物内冷水和热水输送的聚丙烯（PP）管道系统配件的特性，无论是否用于人类消费（家用系统）以及根据应用类别在设计压力和温度下的加热系统（见ISO 15874-1:2013，表1）。包含以下内容:BS EN ISO 15874-3:2013+A1:2018

This part of ISO 15874 specifies the characteristics of fittings for polypropylene (PP) piping systems intended to be used for hot and cold water installations within buildings for the conveyance of water, whether or not intended for human consumption (domestic systems) and for heating systems under design pressures and temperatures according to the class of application (see ISO 15874-1:2013, Table 1).Incorporates the following:BS EN ISO 15874-3:2013+A1:2018