Flange connections involve fixing two pipes, fittings, or equipment to separate flange disks first, then inserting a flange gasket between the two disks and securing them together with bolts, thereby completing the connection. Some fittings and equipment come with a built-in flange disk, which also falls under the category of 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, you may not see flange connections when the pipe diameter is small and the pressure is low. However, in boiler rooms or production sites, you'll find flange connections everywhere.

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