DIN Flange Size:1/2"-60" Material:carbon steel and alloy Standard:ASTM,DIN,JIS.BS, Cert:ISO,TUV, ... joint flange, thread flange, slip on flange, socket welding flange, blind flange2. Material: Stainless steel, carbon steel,alloy steel---20#, A105, Q235A, 331, 304, 304L ... , AWWA4. Facing:TG,RF,MFM,FM,FF,RJDIN WELDING NECK STAINLESS STELL FLANGE