... DN15 to DN2000,1/2" to 78"2.Material:carbon steel,stainless steel3.Standard:ANSI,DIN,JIS,BS,UNI, ... factory in-house self check or Third Party inspection11.Carbon Steel:A105,SS400,SF440,RST37.2,S235,C22.812.Stainless ... ,F316,F316L,316Ti and etc We are a professional manufacture doing flange field for more than ten years.We ... our factory and have a business disussion. professional manufacture of flange