Features: 1) Grades: 301, 304, 304L, 310/S, 316, 316L, 317L, 321 and etc. 2)Standards: ASTM (ASME) A/SA312/M ASTM (ASME) A/SA 213/M, ASTM A269 3) Sizes: O.D.: 20mm to 560mm; W.T.: 1.8mm to 32mm 4) Applied for fluid and gas transport, structure and machining, boiler and heat exchanger and instrumentation