Plate flange is also named plain flange, flat flange and slip on flange etc. A plate flange is a flat, circular disk that is welded onto the end of a pipe and allows it to be bolted to another pipe.
Plate Flanges, which are of wide variety, are manufactured mainly from plates. They are conforming to national & international standards and they are hubless. Plate flanges are produced from quality mill plates. Before cutting pieces out of plates, each plate is checked for serious laminations. They should be virtually free of voids, non-metallic inclusions and other defects. Another important property of plate is its weldability & hardenability. For more critical application of flanges, the hardness, strength and impact properties are also important factors. These properties vary through, along and across the section of the product as a result of temperature and microstructural variations during hot rolling, cold rolling or quenching and cooling.
In addition to our stock of standard flanges, we also offer specialty plate flange products which include machining details such as gasket surfaces, non-standard drilling, facing details, bevel and radius edges, o-ring grooves and raised or recessed faces. Some typical examples are shown below.
Plate flanges are most often used to connect parts of pipelines and in highways. This is due primarily to the fact that the flat flange is easy to use, and has such properties as cheapness and the ability to manufacture from different steel grades.