Home / Standards / GB/T 29537-2013 GB/T 29537-2013 Active Pipe threads with 80 degree thread angle where pressure-tight joints are not made on the threads 80°非密封管螺纹 Standard Type GBT ICS 21.040.30 CCS J04 Status 现行 Issue Date 2013-06-09 Implementation 2014-03-01 Responsible Dept 国家标准委 Drafting Unit N/A