... gradeannual output/t1Oil casing Pipe, joint materialJ55,K55,N80-11000002Oil line pipeB,X42~X60(L245~L415)50003high-pressure boiler tube20G50004lower/medium ... high-pressure fertilizer equipment20G,15MnV10009Shipping use of tube320,4101000Total 200000FQM continuous rolling unit(OD60—180mm,wall thickness 3.5-25mm,length ... use of tube320,360,410,4609000 Total 450000component oil line pipe