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 a crucial method in pipeline construction. They are convenient to use and can withstand high pressure. In industrial pipelines and residential settings, you may not see flange connections when the pipe diameter is small and the pressure is low. However, in boiler rooms or production sites, flange connections are abundant on pipelines and equipment.

Flange connections can be categorized by their connection methods, including: flat welding flanges, socket welding flanges, blind flanges, threaded flanges, flange covers, loose-tightened socket welding flanges, loose-tightened flat welding flanges, ring groove flanges, and flange covers, large diameter flat flanges, large diameter high-neck flanges, L-shaped blank flanges, socket welding ring loose flanges, etc.