Flange connections involve securing two pipes, fittings, or equipment individually onto separate flanges, then inserting a flange gasket between them and tightening them together with bolts to complete the connection. Some fittings and equipment come with their own flanges, which also fall under flange connections. Flange connections are an essential method in pipeline construction. They are convenient to use and can withstand high pressures. 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 will find pipes and equipment connected using flange connections everywhere.

The types of flanges, categorized by their connection methods, include: flat welding flange, socket welding flange, blind flange, threaded flange, flange cover, loose fit flange with neck and socket welding, flat welding loose fit flange, ring groove face flange and flange cover, large diameter flat flange, large diameter high neck flange, blind flange with notches, and loose fit flange with socket welding ring.