The function of flanges is to connect parts and pipelines.
A flange is a component that connects shafts and is used for connecting pipe ends; Also useful is a flange on the inlet and outlet of the equipment, used for connecting between two devices, such as a gearbox flange.

When connecting water pumps and valves to pipelines, the local parts of these equipment are also made into corresponding flange shapes, also known as flange connections. Any connecting part that is closed and bolted around two planes is generally referred to as a "flange", such as the connection of a ventilation duct. This type of part can be referred to as a "flange type part".
Due to its excellent comprehensive performance, flanges are widely used in basic engineering such as chemical engineering, construction, water supply, drainage, petroleum, light and heavy industries, refrigeration, sanitation, plumbing, fire protection, power, aerospace, shipbuilding, etc.
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