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.

Types of flange connections based on connection method include: flat welding flange, welding neck flange, slip-on flange, socket welding flange, threaded flange, blind flange, slip-on ring flange with welding neck, flat ring flange, ring groove flange, blind flange, large diameter flat flange, large diameter high neck flange, L-blank, and slip-on ring flange.