... , slip-on, welding neck, threaded, socket weld, lap-joint Flange(LJ), Socket-welded, Blind Flange, Reducing Flange flange1. Type: Plate, slip ... -on, welding neck, threaded, socket weld, lap-joint Flange(LJ), Socket-welded, Blind Flange, Reducing Flang, Special Flange 2. Surface ...