... 12.2m)No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint material J55,K55,N80-11000002Oil line pipeB, ... typeSteel gradeAnnual output/t1Oil casing Pipe, joint material J55,N80,L80,C90,P110850002Oil casing Pipe, joint material J55,N80 ... ,L80-1,C90,T95,P110,Q125,9Cr,13Cr2100003Line pipe B,X42~X80200004Transmission fluid tube 10,20,Q295, ... 16Mn,15Mnv,12CrMo,15CrMo9000 carbon seamless steel pipe