... Carbon Steel Pipes 1. Standard:GB5310-2008, GB6479-2000, ASTM, ST45.8-111, DIN 17175, GB8163-2008, GB9948-2006, GB8162-20082 ... . Carbon Material:20#, 35#,45#,CK45,ST45,ST55,SA106B3. Alloy Material: 15CrMoG, 12CrMoVG, 10CrMo910, A335P11, T91, A387 ... /A335mASTMA213/A213m16-824×2-100(mm)High Pressure Boiler Tube20GA106c ST45.8/3GB5310-95ASTMA106-99DIN17175-7916-824×2-65(mm)Low ...