gas and oil line pipe Normal OD: 42.3-244.5mm Wall thickness ... material testtensile test, yeild strength, elogation, impact test, chemical analysis,hardness test, charpy impact test,metallographic examinationFinal product testhydraulic test ... yeild strength,elogation hardness test,charpy impact,flattening test chemcial analysis,metallographic examinationPackage1.naked;2.both ends with a plastic ...