Home / Standards / GB/T 12716-2011 GB/T 12716-2011 Active Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads 60°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