Home / Standards / GB/T 27944-2011 GB/T 27944-2011 Active Dryseal pipe threads with the thread angle of 60 degrees 60°干密封管螺纹 Standard Type GBT ICS 21.040.20 CCS J04 Status 现行 Issue Date 2011-12-30 Implementation 2012-10-01 Responsible Dept 国家标准委 Drafting Unit N/A