... 2.produce deponding on your requirment 3,kinds of stypes steel plate flangeCarbon Steel flange For forged rings:15000tons/year For forged flanges ... ,thread flange,slip on flange,blind flange Material:carbon steel,stainless steel and alloy steel fange Standard:ANSI,JIS,BS,DIN,UNI,EN ... and Zn Inspection:in-house and the third party specialize steel plate flange