Home / Standards / GB/T 40297 GB/T 40297 Active Seamless austenitic stainless steel tubes for high-pressure hydrogenation units 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 2024-09-02 Implementation 2022-03-01 Responsible Dept N/A Drafting Unit N/A