Process: forging and machining. or casting and machining Material:Stainless Steel:such as 304,304L,316,316L,321and so on Standard: GB, JIS, BS, DIN, ANSI and Non standard Size:1/2"-40" Type:Slip-on flanges, Blind flanges, Lap joint flanges, Welding neck flanges, Socket welding flanges and Treaded flanges.