Plate flange usually refers to the metal body surrounding a similar disc shaped opening several fixing holes, used to connect other things, flanges are used in pairs, two bolt flange connected industrial sub threaded flange connection (wire) flange and welding flange, flange plate of our including ASME B16.5 welding plate flange welding plate flange, ASME B16.47, DIN 2634 welding plate flange welding plate flange, DIN 2635, DIN 2630 welding plate flange welding plate flange, DIN 2636, DIN 2637 welding plate flange, DIN 2632 plate type flange. The flange is convenient, simple manufacture, low cost, wide use