... , DIN, UNI, BS flat flangesOur flat flanges include carbon steel and stainless steel flat flanges.1), Sizes: 1/2 inch-78 inch ... . SS: F304, F304L, F316, F316L, 316Ti3), Standard: ANSI, JIS, DIN, BS4504, SABS1123, EN1092-1, UNI, AS21294), Types: WN, SO, BL, Plate ... -house self check or Third Party inspection upon requests. Flat Flanges