forged welding neck flanges,St37,DIN,rated pressure10bar 1.Standard:ANSI, DIN,JIS, BS ... /alloy/Aluminum steel Description of Flange: Production Name forged welding neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar ... flange,weld neck flange, slip on flange , plate flange , Threaded flange, blind flangeInspection Factory in-house or Third Party inpection forged welding neck flanges ...