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, thus completing the connection. Some fittings and equipment come with a flange disk already attached, which also falls under flange connections. Flange connections are a crucial method in pipeline construction. They are convenient to use and can withstand high pressure. In industrial pipelines and residential settings, where pipe diameters are small and the pressure is 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 connection method, include: flat welding flanges, socket welding flanges, blind flanges, threaded flanges, flange covers, loose fit socket welding flanges, flat socket welding flanges, ring groove flanges, large diameter flat flanges, large diameter long neck flanges, winged blind flanges, and socket welding ring flanges, etc.