10, 20, Q295,Q345 High accuracy ,Good quality fast delivery and good service Product program and production range1,Accu-roll unit(OD114—273mm. WALL THICKNESS 6-25mm.LENGTH 6-12.2m)No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB,X42~X60(L245~L415)50003high-pressure boiler tube20G50004lower/medium-pressure boiler tube10#,20#,A, ...