Home / Standards / GBT 31937-2015 GBT 31937-2015 Straight seam submerged arc welded steel pipe for coal slurry transportation 煤浆输送用直缝埋弧焊钢管 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