In pipeline engineering, flanges are mainly used for connection of pipelines.
A flange is installed at the end of the two pipelines. Wire connection flanges can be used for low-pressure pipelines, and welding flanges can be used for pressures above 4 kg. Add a gasket between the two flanges, and then tighten with bolts.
Different pressure flanges have different thicknesses and use different bolts.
When the water pump and valve are connected to the pipeline, some parts of these equipments are also made into corresponding flange shapes, also called flange connection.
All the connecting parts that are bolted around the two planes and closed at the same time are generally called "flanges". For example, the connection of ventilation pipes, such parts can be called "flange parts".