dn80 carbon steel weld neck flange 1.size:1/2"~60" 2.standard:ANSI,BS,ASME,GB,GOST dn80 carbon steel weld neck flange Types of flangeweld neck flange, slip on flange, plate flange, blind flange, socket weld flange, threaded flange, lap joint flange, ring joint flangeSize1/2"~60" (DN15-DN2000) Wall thicknesssch5-sch160,xs,xxsMaterialcarbon steel,stainless steel, alloy steel.Techniquecasting or ...