... product description Carbon Steel Pipes 1. Standard:GB5310-2008, GB6479-2000, ASTM, ST45.8-111, DIN 17175, GB8163-2008, GB9948 ... 88GB5310-95GB9948-88ASTMA335/A335mASTMA213/A213m16-824×2-100(mm)High Pressure Boiler Tube20GA106c ST45.8/3GB5310-95ASTMA106-99DIN17175-7916-824× ... 1.5-36(mm)Chemical fertilizer equipment, with high-pressure pipe2016MnQ345GB6479-200025-426×6-40(mm)Fluid Pipe20Q345GB/T8163-19998 ...