Flange connections involve securing two pipes, fittings, or equipment to separate flange discs first, then adding a flange gasket and fastening them together with bolts to complete the connection. Some fittings and equipment come with built-in flange discs, which also fall 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 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.

Flanged connections can be categorized by their connection methods, including: flat welding flanges, welding neck flanges, socket welding flanges, slip-on flanges, threaded flanges, blind flanges, welding neck ring type loose flanges, flat ring type loose flanges, ring groove flanges, and blind flanges, large diameter flat flanges, large diameter high neck flanges, winged blind flanges, and socket welding ring type loose flanges, etc.