Flange connections involve securing two pipes, fittings, or equipment to separate flange discs first, then inserting a flange gasket between the two discs and fastening them together with bolts to complete the connection. Some fittings and equipment come with a flange disc already attached, which also falls under flange connections. Flange connections are an essential 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.

According to the type of connection, flange connections can be categorized as: flat welding flanges, socket welding flanges, blind flanges, threaded flanges, cover flanges, loose fit socket welding flanges, flat socket welding flanges, ring groove flanges, large diameter flat flanges, large diameter long neck flanges, L-shaped blind flanges, and loose fit socket welding ring flanges, etc.