Bolted Flange

Flange, also known as a flange disc or boss, is a component used for connecting shafts to each other, typically for pipe-end connections; it is also used on equipment进出口 for connecting two devices, such as a reducer flange. A flange connection or flange joint refers to a removable joint that consists of a flange, a gasket, and bolts, forming a combined sealing structure. Pipe flanges are the flanges used in piping installations; on equipment, they refer to the equipment's进出口 flanges. Flanges have holes for bolts, which secure the two flanges together. They are sealed with a gasket. Flanges are available in threaded (screwed) connections,焊接 flanges, and clamp flanges. Flanges are always used in pairs; low-pressure pipelines can use threaded flanges, while those above four kilograms of pressure use焊接 flanges. Two flange discs are joined with a sealing pad and then bolted together. Flange thickness and the bolts used vary with pressure ratings. Pumps and valves, when connected to pipes, have locally shaped flanges to correspond, also known as flange connections. Any connection piece that uses bolts to connect two flat surfaces around the edges and is sealed is generally called a "flange," such as the connection on ventilation pipes. These components can be referred to as "flange-type parts." However, such connections are only a part of a device, like the connection between a flange and a pump, so it's not appropriate to call the pump a "flange-type part." Smaller items like valves can be called "flange-type parts."