Standards:ASTM A213, ASTM A312 Grade:TP304, TP304L, TP316, TP316L,TP316Ti, TP310S, TP321 ect. STAINLESS STEEL SEAMLESS PRECISION TUBES, HEAT EXCHANGER TUBES, BOILER TUBES.GRADE: 304/L, 316/L, 321, 316Ti, 310S, 347/H, SAF1805, 2205, 2507, 904L.SPEC.: ASTM A213/269, ASTM A450, A789/790, ASTM A1016; DIN2462, DIN2391, DIN17456, 17458; EN10216,JIS G3459, 3463.OD: 6.0MM ~ 273MM.WT: 0.5MM ~ 25MM ...