ISO 15875-3:2003规定了旨在用于建筑物内的热水和冷水设施的交联聚乙烯（PE-X）管道系统的配件的特性，用于运输可能用于或不可能用于人类消费的水（家用系统）或供暖系统，在适用于应用类别的设计压力和温度下。 它涵盖一系列服务条件（应用类）和设计压力等级。如果设计温度，最大设计温度和故障温度的值超过ISO 15875-1中给出的值，则不适用。 它还规定了本标准中提到的测试方法的参数。 结合ISO 15875的其他部分，它适用于由PE-X制成的配件，以及适用于符合ISO 15875-2标准的管道的其他材料制成的接头，以提供符合ISO要求的接头15875-5。 适用于以下类型的配件: 机械配件 电熔配件 带插入插件的配件

ISO 15875-3:2003 specifies the characteristics of fittings for crosslinked polyethylene (PE-X) piping systems intended to be used for hot and cold water installations, within buildings, for the conveyance of water which may or may not be intended for human consumption (domestic systems) or for heating systems, under design pressures and temperatures appropriate to the class of application. It covers a range of service conditions (application classes) and design pressure classes. It does not apply if the values of the design temperature, maximum design temperature and malfunction temperature are in excess of those given in ISO 15875-1. It also specifies the parameters for the test methods referred to in this standard. In conjunction with the other parts of ISO 15875, it is applicable to fittings made from PE-X and to fittings, made from other materials, intended to be fitted to pipes conforming to ISO 15875-2 to give joints conforming to the requirements of ISO 15875-5. It is applicable to fittings of the following types: mechanical fittingselectrofusion fittingsfittings with incorporated inserts.