... supply various types of flanges. Size1/2"~60" (DN15-DN2000) Wall thicknesssch5-sch160,xs,xxs. Materialcarbon steel:ASTM A234 WPB,WPC,ASTMA420WPL9 WPL3 ... 304L,A304WP 316/316L,WP321,WP347,WPS31254 alloy steel:ASTM A234 WP, WP11,WP12,WP5,WP9,WP91TechniqueForged or Casting StandardASTM A182 ... 2633,2543,2634,JIS 5K,10K,16K,20K, ANSI B16.5, GB/T9112-2000 Application rangesuch as oil industry,chemical industry ...