... ,A213,A269, A789 2)OD(6-273MM) WT0.5-16MM carbon seamless steel tube1)specification: ASTM A312,A213,A269, ... A789 2)OD(6-273MM) WT0.5-16MM carbon seamless steel tube1)specification: ASTM A312,A213,A269, ... A7892) OD: 6-273MM WT:0.5-24.5MM3)DELIVERY ... DNV and Lloyd's certification successfully 304,304Lseamless carbon steel tube