Home / Standards / GB/T 34105-2017 GB/T 34105-2017 Active Seamless steel tubes for ocean engineering structures 海洋工程结构用无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 现行 Issue Date 2017-07-31 Implementation 2018-04-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A