... of type 4.It is multifunction Forged FlangeCarbon Steel flange For forged rings:15000tons/yearFor forged ... slip on flange,blind flange Material:carbon steel,stainless steel and alloy steel fange Standard:ANSI,JIS,BS,DIN,UNI ... ,EN,GB,AWWA,API,MSS,LWN,Orifice,8-Figure flange Size:OD up ... in-house and the third party High Quality Stainless Steel Special Forged Flange