... of chemical analysis,metallographic examination,physical testing,nondestructive inspection and other advanced inspection skills.Our company is a large ... include hot roll , cold draw ,Specially, heavy wall seamless pipes . casing pipe etcMaterial -Carbon Steel , Alloy SteelHot roll SMLS ... ,A333, A192, A179, A213, X42 ST33 ST37 ST37-2 ST35.8 ST42 ST45 ST52 13CrMo44 etcStandard-ASTM API 5L, 5CT,DIN17175 ...