... 10-12-14-16-18-20Mainly used in boiler pipe & welded pipeCold Rolled CoilQ195, Q215, Q235, ... API P110GB9948-2000114-273mm, 4-13mmWall lining for oil wellsERW Steel PipeQ195-Q345ASTM, GB0.8-12mm,19 ... .5-16mmWidely used in the construction,pipe of industrial,water pipe,fence equipment,telecommunication tubes as well ... ,ASTM,API5L2.1-110mm,10.3-508mmUsed in oil & gas fieldsWelded Steel Pipe10#,20#,45#,Q195 ...