Plate Flange, Flat Flange, Slip on Flange, Welding Neck Flange, Long Welding Neck Flange, Blind Flange, Socket Wel Materials:Type: welding neck, slip-on, threaded, lap- ... , F316H, F310, F321A182 F11, F22,Manufacturing standards: API, ANSI, BS, JIS, UNI, MSS and SPPressure: ANSI class 150 to 2,500Size ...