Plate flange designs are uniform in any given size regardless of materials used to create them. This allows a 6-inch (15 cm) black pipe flange to mate perfectly with a 6-inch stainless steel flange. The plate flanges will have a serrated finish on the inside mating surface, which allows the plate to seat into the gasket material. This ensures a perfect seal between two joining pipes.
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.
The variety of steel grades from which flanges are made allows the use of this product as the connecting parts of the pipeline in almost all environmental conditions (temperature, humidity, etc.) and in accordance with the environment passing through the pipeline (including aggressive ones).
Plate flange is a piece of steel in the form of a ring, which has holes for fastening the flange to the elements of the pipeline with bolts or studs. The steel flange is put on the pipe and welded to the joints with it, after which another flange is welded to the flange through a special gasket by means of fastening, welded to another pipe, pipeline element or instrument.
The ASME B16.5 Plate Flange also referred to as a plain flange is a flat circular disk which has an inner bore along with bolt holes on it. In addition to this, the Plate Flange is known as a flat flange.