... 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 ... Flange 2. Surface treatment: Transpaent/yellow/Black anti-rust paint, tranparent oil 3. Packing: Wooden case or as per customers'requirement slip on flange ...