forged welding neck flanges,St37,DIN,rated pressure10bar 1.Standard:ANSI, DIN,JIS, BS 2.carbon/stainless/alloy/Aluminum steel Description of Flange: ... Production Name forged welding neck flanges,St37,DIN,DN: ... /4''-48'',DN8-DN1200WTSCH5S-XXSStandardANSI B16.9, ANSI B16.28, DIN , ISO, EN,JIS,MSS SP, BSCarbon Steel 10# 20# ...