... " 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 ... days according to quantity PortTianjin seaport,China. dn80 carbon steel weld neck flange