A brief discussion on flange connections and their applications

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The article is from http://www.sdshuntong.net. A flange is a disc-shaped component that is very common in piping projects, and flanges are always used in pairs. 　　In pipeline engineering, flanges are mainly used for connecting pipes. A flange is installed at each end of the pipe that needs to be connected; threaded flanges can be used for low-pressure pipes, while welded flanges are used for pipes under a pressure of 4 kilograms or more. A seal is added between the two flanges, which are then tightened with bolts. 　　Flanges under different pressures have different thicknesses and require different bolts. 　　When water pumps and valves are connected to pipes, the corresponding parts of these devices are also made in the shape of flanges, a connection method known as flange coupling. Any connecting component that uses bolts to join two planes together at their perimeters and thereby seals them is generally referred to as a \"flange\"; for example, in the connection of ventilation ducts, such components can be called \"flange-type components\". 　　However, such a connection is only a local part of a device; for example, the connection between a flange and a pump means it’s not appropriate to refer to the pump as a \"flange-type component\". Smaller items such as valves can be referred to as \"flange components\". 　　Flange connection is an important method of connection in pipeline construction. 　　Flange connection involves first fixing two pipes, fittings, or components to separate flanges, placing a flange gasket between the two flanges, and then fastening them together with bolts to complete the connection. Some pipe fittings and equipment already come with flanges, and they also utilize flange connections. 　　Flanges are divided into threaded flanges and welded flanges. For low-pressure applications with small diameter threaded flanges, welded flanges are used for high-pressure and low-pressure applications with large diameter flanges. The thickness of the flanges, as well as the diameter and quantity of the connecting bolts, vary depending on the pressure level. 　　Depending on the different pressure levels, flange gaskets are made from various materials, ranging from low-pressure asbestos gaskets and high-pressure asbestos gaskets to metal gaskets. 　　Flange connections are easy to use and can withstand high pressures. 　　Flange connections are widely used in industrial pipelines.