Home / Standards / GB/T 5312-2009 GB/T 5312-2009 Abolished Carbon and carbon-manganese steel seamless steel tubes and pipes for ship 船舶用碳钢和碳锰钢无缝钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 废止 Issue Date 2009-10-30 Implementation 2010-05-01 Responsible Dept 中国钢铁工业协会 Drafting Unit N/A