B16.5 A105N cl3000 weld neck RF Flange 1.Type: WNRF, ... 2"-60" 4.Certificate:ISO B16.5 A105N cl3000 weld neck RF Flange1.Type: WNRF, SO,SW,BLF, ... : Weldneck, Slipon, Blind, Socket Weld, Lap Joint, Spectacles, Ringjoint, Orifcase, Long Weldneck, Threaded, weld plate, etc.Size : 1/8" ... pipe fittings, flanges are mainly used in petroleum, gas,shipbuilding,electric power basis on the standard quality butt ...