Flange connections involve securing two pipes, fittings, or equipment to separate flange discs first, then inserting a flange gasket between them and fastening them together with bolts, thus completing the connection. Some fittings and equipment come with their own flange discs and are also considered flange connections. Flange connections are an important method of pipe 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 will find flange connections on pipes and equipment everywhere.

The types of flange connections, categorized by their connection methods, include: flat welding flanges, socket welding flanges, blind flanges, threaded flanges, flange covers, ring-type joint flanges, lap joint flanges, large diameter flat flanges, large diameter long-neck flanges, winged blind flanges, and socket welding ring flanges, etc.