Home / Standards / GB/T 34201-2017 GB/T 34201-2017 Active Seamless hot-rolled square and rectangular steel tubes for structure 结构用方形和矩形热轧无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2017-09-07 Implementation 2018-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A