Flange is a part that connects between shaft and shaft. It is used for the connection between pipe ends. It is also used for the flange on the inlet and outlet of the equipment, which is used for the connection between two equipment, such as the reducer flange. Flange connection or flange joint refers to a detachable connection in which flanges, gaskets and bolts are connected to each other as a set of combined sealing structures.

Pipe flange refers to the flange used for piping in the pipeline installation, and refers to the inlet and outlet flanges of the equipment when used on the equipment. There are holes on the flanges and bolts make the two flanges tightly connected. The flanges are sealed with gaskets.

Because the flange has good comprehensive performance, it is widely used in basic projects such as chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire fighting, electric power, aerospace, shipbuilding and so on.