Flange connections involve securing two pipes, fittings, or equipment to each side of a flange disk, inserting a flange gasket between them, and then fastening them together with bolts to complete the connection. Some fittings and equipment come with a built-in flange disk, which also falls under flange connections. Flange connections are a crucial method in pipeline construction. They are convenient to use and can withstand significant pressure. In industrial pipelines and residential settings, where pipe diameters are small and pressures are low, flange connections are not visible. However, in boiler rooms or production sites, you'll find flange connections on pipes and equipment everywhere.

The types of flange connections, categorized by the method of connection, include: flat焊接flanges, welding neck flanges, socket welding flanges, lug flanges, threaded flanges, flange covers, welding neck loose-tolerance flanges, flat loose-tolerance flanges, ring groove flanges and flange covers, large diameter flat flanges, large diameter high-neck flanges, blind flanges, socket welding loose-tolerance flanges, etc.