First, each flange is fixed on a flange, and a flange gasket is added between the two flanges. They are fastened together with bolts to complete the connection. Some pipe fittings and equipment already come with flanges, which also belong to flange connections. Flange connection is an important connection method in pipeline construction. The flange connection is convenient to use and can withstand large pressures. In industrial pipelines, flange connections are widely used. In households, the diameter of the pipeline is small and it is low-pressure, so flange connections are not visible. If in a boiler room or production site, there are pipes and equipment connected by flanges everywhere.