Flange is the shaft and shaft connected parts, used for the connection between the pipe end;  Also useful in equipment inlet and outlet flange, used for the connection between two equipment, such as reducer flange.  Flange connection or flange joint  refers to a detachable connection made of flange, gasket and bolt which are connected to each other as a group of assembled sealing structures.  Pipeline flanges refer to the flanges for piping in pipeline devices and the import and export flanges of equipment when used in equipment.  There are holes in the flange and bolts hold the two flanges together.  

    Gasket seals between flanges.  Because the flange has good comprehensive performance, it is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, water heating, fire, electric power, aerospace, shipbuilding and other basic engineering.