Home / Standards / GB/T 31940-2015 GB/T 31940-2015 Abolished Bi-metal composite corrosion resistance steel pipe for fluid transportation 流体输送用双金属复合耐腐蚀钢管 Standard Type GBT ICS 77.140.75 CCS H48 Status 废止 Issue Date 2015-09-11 Implementation 2016-06-01 Responsible Dept 中国钢铁工业协会 Drafting Unit 中国钢铁工业协会