... 6-12.2m)No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint material J55,K55,N80-11000002Oil line pipeB,X42~X60 ... J55,N80,L80-1,C90,T95,P110,Q125,9Cr,13Cr2100003Line pipe B,X42~X80200004Transmission fluid tube 10,20,Q295,Q345350005high-pressure ... ,35CrMo,40Cr3500010Shipping use of tube320,360,410,4609000 Total 450000 hydraulic stand pipe