Home / Standards / GBT 31940-2015 GBT 31940-2015 Bimetal composite corrosion-resistant steel pipes for fluid transport 流体输送用双金属复合耐腐蚀钢管 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A