S.S/C.S/Alloy Flanges >Production standard: *S.S/C.S/Alloy Flanges >Production standard: ANSI B16.5, ANSI B16.47... API, DIN, JIS, BS, >Production size: 1/2 inch - 120 inch ( 15mm - 3000mm ) >Main material: ASTM A350 LF2, ASTM A182 F5, F11,F12,F22,F304/304L F316/316L, SS400, SF440, 16Mn, Q235, 20#.