... seamless steel tube 1)specification: ASTM A312,A213,A269, A789 2)OD(6-273MM) WT0.5-16MM carbon seamless steel tube1) ... A789 2)OD(6-273MM) WT0.5-16MM carbon seamless steel tube1)specification: ASTM A312,A213,A269, A7892) OD: ... large diameter with thin thickness alloy tubeWe have passed the ISO9001 authentication, PED, DNV and Lloyd's certification successfully 304,304Lseamless carbon steel tube ...