Description:- Slipon Flanges Range: - 15 NB TO 1500NB (1/2 to 60") ANSI B 16.5 (150#, 300#, 400#, 600#, 900#, 1500# & 2500#) Material: Stainless Steel - ASTM A-182 (304, 304L, 316, 316L Carbon Steel - ASTM A-105, A-350 LF2, IS 2062, AS 516 Gr. 70, C45 Alloy Steel - ASTM A-182 F5, F9, F11, F12, F21, F22.