Home / Standards / GB/T 28776-2012 GB/T 28776-2012 Active Steel gate, globe and check valve for the petroleum and natural gas industries (for sizes DN100 and smaller) 石油和天然气工业用钢制闸阀、截止阀和止回阀(≤DN100) Standard Type GBT ICS 23.060.99 CCS J16 Status 现行 Issue Date 2012-11-05 Implementation 2013-03-01 Responsible Dept 中国机械工业联合会 Drafting Unit N/A