1.Experienced team foucs on customer servies 2.ISO. API certified 3.On time delivery 4.Reasonable price ... gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB,X42~X60(L245~L415)50003high-pressure boiler tube20G50004lower/medium ... ,40Cr3500010Shipping use of tube320,360,410,4609000 Total 450000component oil line pipe