... system by butt welding. They are expensive because of its long neck, but is preferred for high stresses to the pipe, reducing ... Type Slip-on flanges, Blind flanges, Lap joint flanges, Welding neck flanges, Plate flange, Socket welding flanges, Threaded flanges Flange Standard ... -On welded flange, SO flange, RF SO flange, Welded Neck Flange, Welded-Neck Flange, WN flange, WN RF flange, WNF flange, LJ ...