... :1/2"~60" 2.standard:ANSI,BS,ASME,GB,GOST dn80 carbon steel weld neck flange Types of flangeweld neck flange ... , threaded flange, lap joint flange, ring joint flangeSize1/2"~60" (DN15-DN2000) Wall thicknesssch5-sch160,xs,xxsMaterialcarbon steel,stainless steel, alloy ... /25/45/60 days according to quantity PortTianjin seaport,China. dn80 carbon steel weld neck flange