Flange connections involve securing two pipes, fittings, or equipment individually to a flange, then using a gasket and bolts to tighten the two flanges together, thus completing the connection. Some fittings and equipment come with a flange already attached, which also falls under flange connections. Flange connections are an essential method for pipeline construction. They are convenient to use and can withstand high pressure. In industrial pipelines and within homes, you often won't see flange connections if the pipe diameter is small and the pressure is low. However, in boiler rooms or production sites, you'll find flange-connected pipes and equipment everywhere.

According to the connection method, flange types can be classified as: flat焊接plate flange, socket焊接flange, welding neck flange, lug welding flange, threaded flange, flange cover, welding neck ring type loose flange, flat ring type loose flange, ring groove face flange and cover, large diameter flat flange, large diameter high neck flange, blind flange with ears, welding neck ring type loose flange, etc.