carbon steel seamless pipe OD:60mm-273mm WT:3.5mm-25mm Standard:ASTM,DIN,API,JIS etc... Place of Origin: China ... )No.Steel typeSteel gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB,X42~X60(L245~L415)50003high-pressure ... Steel typeSteel gradeAnnual output/t1Oil casing Pipe, joint materialJ55,N80,L80,C90,P110850002Oil casing Pipe, joint materialJ55,N80,L80-1,C90 ...