... ,20k,30k,150# to 2500#,PN6-PN40carbon steel forged flange 1.Size:DN15 to DN2000,1/2" ... -on,threaded,socket weld,blind flange5.Process:free forging, plate cutting, heat treat, machining6.Surfact treated ... self check or Third Party inspection11.Carbon Steel:A105,SS400,SF440,RST37.2,S235,C22.812 ... .Stainless Steel:F304,F304L,F316,F316L,316Ti and etc We are a professional manufacture doing flange field ...