... ,UNI,EN1092-1,SABS1123,AS2129,GOST-128204.Types:plate,slip-on,threaded,socket weld,blind flange5.Process: ... free forging, plate cutting, heat treat, machining6.Surfact treated:Anti-rust ... ,F316L,316Ti and etc We are a professional manufacture doing flange field for more than ten years. ... and have a business disussion. professional manufacture of flange