... ,316,etc. 2.all sorts of design 3.ISO,SGS stainless steel flange,duplex,weld neck flange.. Type:Slip On Flange, Welding Neck ... ,F316,F316L,F316H,F317,F317L,F347H,F310S,F310H,F321,F321HSuperaustenitic stainless steel:S31254Duplex stainless steel:S31500,S31803(2205),S32304,S32205,S32760,S32750,HDRCopper Nickel ...