... flanges are also used in industry where pipe lines require high pressure flanges and we use quality ... Blank flanges Material Specifications: Carbon Steel : ASTM A 105, A 266 Alloy Steel : ASTM A 182, GR F1 ... , F9, F7, F11, F12, F21, F22 Stainless Steel : 304,304H,304L,310,310 S,321,321H, 316Ti ... ,316H,316L, 347,347H, Duplex Steel , UNS S 31803, 2205 , Super Duplex Steel , UNS S 32750Nickel Alloys : Monel ...