... Aluminum steel Description of Flange: Production Name forged welding neck flanges,St37,DIN,DN:50-600 mm ... ,rated pressure:10 bar Size1/4''-48'',DN8-DN1200WTSCH5S-XXSStandardANSI ... , ISO, EN,JIS,MSS SP, BSCarbon Steel 10# 20# Q235B A234 A105 A403Stainless Steel 1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni10 ... Factory in-house or Third Party inpection forged welding neck flanges,St37,DIN,DN:50-600 mm ...