... -5-10-12-14-16-18-20Mainly used in boiler pipe & welded pipeCold Rolled CoilQ195, Q215, Q235, Q275, Q345ASTM,GB,JIS ... , API L80, API N80, API P110GB9948-2000114-273mm, 4-13mmWall lining for oil wellsERW Steel PipeQ195-Q345ASTM, GB0.8-12mm,19 ... ,ASTM20-165mm,0.5-16mmWidely used in the construction,pipe of industrial,water pipe,fence equipment,telecommunication tubes as well as green house ...