... -5-10-12-14-16-18-20Mainly used in boiler pipe & welded pipeCold Rolled CoilQ195, Q215, Q235, Q275, Q345ASTM,GB,JIS ... ,fertilizer equipment and pipelines under high pressure or high tempretureOil casing pipeAPI J55, API K55, API L80, API N80, API P110GB9948 ... ,ASTM20-165mm,0.5-16mmWidely used in the construction,pipe of industrial,water pipe,fence equipment,telecommunication tubes as well as green ...