forged welding neck flanges,St37,DIN,rated pressure10bar 1.Standard:ANSI, DIN,JIS, BS 2.carbon/stainless/alloy/ ... neck flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar Size1/4''-48'',DN8-DN1200WTSCH5S-XXSStandardANSI B16.9, ... .28, DIN , ISO, EN,JIS,MSS SP, BSCarbon Steel 10# 20# Q235B A234 A105 A403Stainless Steel 1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni10 304 ... flanges,St37,DIN,DN:50-600 mm,rated pressure:10 bar