... 2.standard:DIN,ANSI,JIS,GB 3.material:Carbon steel carbon steel flange Our company supply various types of flanges ... -DN2000) Wall thicknesssch5-sch160,xs,xxs. Materialcarbon steel:ASTM A234 WPB,WPC,ASTMA420WPL9 WPL3,WPL6,WPHY42/ ... ,WP347,WPS31254 alloy steel:ASTM A234 WP, WP11,WP12,WP5,WP9,WP91TechniqueForged or Casting StandardASTM A182 ,DIN2573 ... ,China. The process flow diagram: carbon steel flange