Home / Standards / GB/T 35990-2018 GB/T 35990-2018 Active Metal bellows expansion joints for pressure piping 压力管道用金属波纹管膨胀节 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2018-03-15 Implementation 2018-10-01 Responsible Dept 中国机械工业联合会 Drafting Unit 中国机械工业联合会