Flange connections involve securing two pipes, fittings, or equipment to separate flange plates first, then placing a flange gasket between the two plates and fastening them together with bolts to complete the connection. Some fittings and equipment come with a flange plate 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, where pipe diameters are small and pressure is low, flange connections are often not visible. However, in boiler rooms or production sites, you'll find pipes and equipment connected by flanges everywhere.

According to the connection method, the types of flanges can be divided into: flat焊接plate flanges, neck焊接flanges, socket焊接flanges, slip-on flanges, threaded flanges, blind flanges, neck socket welding ring flanges, flat socket welding ring flanges, ring groove flanges and blind flanges, large diameter flat flanges, large diameter high-neck flanges, blind flanges with a "V" shape, socket welding ring flanges, etc.