Home / Standards / GB/T 37357-2019 GB/T 37357-2019 Active Cast iron pipes, fittings and accessories for rain drainage of building roof 建筑屋面雨水排水铸铁管、管件及附件 Standard Type GBT ICS 23.040.10 CCS H48 Status 现行 Issue Date 2019-03-25 Implementation 2020-02-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A