These mechanical flanges use precision CNC machining, milling, CNC Lathe Turning, Tapping, Drilling, Grinding, Wire EDM etc.
Tolerance of all dimension is between +/-0.01mm and hole tolerance +/-0.005m.

Flange connection is mainly the connection of industrial structural parts. 
Flanges are parts for interconnection between shafts and shafts and are used for connection between pipe ends; they are also used for connection between two devices by flanges on the inlet and outlet of the device. Flange (flange) connection is the two pipes, fittings or equipment, each fixed in a flange first, between the two flanges, plus flange gasket, fastened together with bolts, completed the connection. Flange connection is an important connection method for pipeline construction.
General flanges have round holes used to play a fixed role, such as the use of pipeline connections, between the two flanges with seals, and then bolted connection, different pressure flanges have different thickness and use different bolts, flanges using the main material carbon steel, stainless steel and alloy steel and so on.
Because of the important role played by the flange and has a good overall performance, it is widely used in chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding and other basic engineering.