Home / Standards / GB/T 30063-2013 GB/T 30063-2013 Active Longitudinal submerged arc welded steel tubes for structural purpose 结构用直缝埋弧焊接钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2013-12-17 Implementation 2014-09-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A