... team foucs on customer servies 2.ISO. API certified 3.On time delivery 4.Reasonable price ... 2m) No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB, ... typeSteel gradeAnnual output/t1Oil casing Pipe, joint materialJ55,N80,L80,C90,P110850002Oil casing Pipe, joint materialJ55,N80,L80 ... tube320,360,410,4609000 Total 450000component oil line pipe