STAINLESS STEEL FLANGE Standards: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings Size: 1/2 (15 NB) to 48 (1200NB) Pressure Ratings: Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc. ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L Alloy Steel Flanges: ASTM A182 F1, F5, F9, F11, F22, F91 can supply Fittings according your drawings