forged welding neck flanges,St37,DIN,rated pressure10bar 1.Standard:ANSI, DIN,JIS, ... Description of Flange: Production Name forged welding neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar ... -XXSStandardANSI B16.9, ANSI B16.28, DIN , ISO, EN,JIS,MSS SP, BSCarbon Steel 10# 20# Q235B A234 ... or Third Party inpection forged welding neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar