AS2129 TABLE D FLANGE manufacturers tell you that a flange is a disc-shaped part that is most common in plumbing engineering, and flanges are used in pairs. In pipeline engineering, flanges are mainly used for the connection of pipelines. In the pipelines that need to be connected, a flange plate can be installed in various ways. Wire flanges can be used for low-pressure pipelines, and welded flanges can be used for pressures above 4 catties.

AS2129 TABLE D FLANGE manufacturers tell you that add a sealing point between the two flanges, and then fasten them with bolts. Different pressure flanges have different thicknesses and use different bolts. When pumps and valves are connected to pipelines, parts of these equipment are also made into corresponding flange shapes, also known as flange connections.
AS2129 TABLE D FLANGE manufacturers tell you that any connection parts that are bolted on two planes at the periphery and closed at the same time are generally called "flanges", such as the connection of ventilation ducts, this type of parts can be called "flange type" Components". But this connection is only a part of the equipment, such as the connection between the flange and the water pump, it is not easy to call the water pump "flange parts". Smaller ones, such as valves, can be called "flange parts".
The above information is the AS2129 TABLE D FLANGE manufacturer's introduction and analysis of how to choose flange, hope it helps you.