... On Flange, Welding Neck Flange, Socket Welding Flange, Threaded Flange, Lap Joint Flange, Blind Flange and other kinds of special flangs.Standard ... ,F316H,F317,F317L,F347H,F310S,F310H,F321,F321H· Superaustenitic stainless steel:S31254· Duplex stainless steel· S31500,S31803(2205),S32304,S32205,S32760,S32750,HDR· Copper ... die forging from round bar,CNC machining,Drilling and Passivating Lap Joint Flange