Home / Standards / GB/T 40297-2021 GB/T 40297-2021 Active Seamless austenitic stainless steel pipes for high pressure hydrogenation unit 高压加氢装置用奥氏体不锈钢无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2021-08-20 Implementation 2022-03-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A