Flange is a disc-shaped part, the most common in pipeline engineering.
The edge has a mechanical structure with bolted flanges, such as pipe butt joints. If there is a flange on the interface, it can be connected with bolts. Flange cover means that the edge of the cover has a flange edge and can be fixed with bolts. The flanges are used in pairs. In pipeline engineering, flanges are mainly used for pipeline connection. In the pipelines that need to be connected, a flange plate is installed in various ways. The low-pressure pipeline can use the wire flange, and the welding flange is used for the pressure above 4 kg. Add a sealing point between the two flanges, and then tighten them with bolts. Flanges with different pressures have different thicknesses and use different bolts.
When water pumps and valves are connected with pipelines, parts of these equipments are also made into corresponding flange shapes, also called flange connections. All connecting parts that are connected by bolts on the two planes and are closed at the same time are generally called "flanges", such as the connection of ventilation pipes. This kind of parts can be called "flange parts". But this kind of connection is only a part of the equipment, such as the connection between the flange and the water pump, it is not good to call the water pump "flange parts". Smaller ones, such as valves, can be called "flange parts".
