Flange connections involve securing two pipes, fittings, or equipment to separate flange discs first, then inserting a flange gasket between the two discs and tightening them together with bolts to complete the connection. Some fittings and equipment come with built-in flange discs, which also fall 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 ubiquitous on pipes and equipment.

According to the type of connection, flange connections can be categorized as: flat焊接flanges, welding neck flanges, socket welding flanges, sleeve flanges, threaded flanges, flange covers, welding neck loose ring flanges, flat loose ring flanges, ring groove flanges and flange covers, large diameter flat flanges, large diameter high neck flanges, winged blind flanges, socket welding loose ring flanges, and others.