... 4.Reasonable price 5.Samples ,OEM a Product program and production range1,Accu-roll unit(OD114—273mm. WALL THICKNESS ... 6-12.2m) No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB,X42~X60(L245 ... No.Steel typeSteel gradeAnnual output/t1Oil casing Pipe, joint materialJ55,N80,L80,C90,P110850002Oil casing Pipe, joint materialJ55,N80,L80-1,C90,T95, ...