... CS. Size1/2"-72"Class150#, 300#, 400#, 600#, 900#, 1500#, 2500#SpecificationStainless Steel ASTM A182 F304 ... /F55/F60Nicke alloys Nickel 200, Monel 400, Inconel 600/625, Incoloy 825/800Cu-Ni 90/10, ... SLIPON FLANGE, THREADED FLANGE.Pressure Class: 300, 400, 600, 900, 1500, 2500* ASTM/ANSI B16.48: ( ... NECK FLANGE, BLIND FLANGE.Pressure Class: 300, 400, 600, 900* API 6A: WELDING NECK FLANGE, THREAD FLANGE ...