Home / Standards / GB/T 12621-2008 GB/T 12621-2008 Active Standard test method for stress relaxation of gaskets for pipe flanges 管法兰用垫片应力松弛试验方法 Standard Type GBT ICS 23.040.60 CCS J15 Status 现行 Issue Date 2008-05-07 Implementation 2008-11-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A