... high pressure flanges and we use quality SS grade materials for our flanges in highly corrosive areas thus ensuring durability ... , Super Duplex Steel , UNS S 32750Nickel Alloys : Monel 400 & 500, Inconel 600 & 625, Incolloy 800, 825, Hastelloy C22,C276Copper Alloys : Copper, ... 1/8" NB TO 48"NB.Class : 150#, 300#,400 #,600#,900#, 1500# & 2500 #. Technical Specifications Nominal Pipe Size (NPS)Outside ...