ISO 16631:2016/Amd 1:2018
与塑料(PVC 或 PE)管道系统兼容的球墨铸铁管、配件、配件及其接头 用于水应用和塑料管道连接、维修和更换
Ductile iron pipes, fittings, accessories and their joints compatible with plastic (PVC or PE) piping systems, for water applications and for plastic pipeline connections, repair and replacement