Home / Standards / GB/T 37578-2019 GB/T 37578-2019 Active Urea grade ultra-low carbon austenitic seamless stainless steel tubes and pipes 尿素级超低碳奥氏体不锈钢无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2019-06-04 Implementation 2020-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A