The maintenance method of the hub flange: When the temperature of the hub is high, it should be allowed to cool down before cleaning. Never use cold water to clean it. Otherwise, the aluminum alloy wheel hub will be damaged, and even the brake disc will be deformed and the braking effect will be affected. Flange is also called flange or flange. The parts that connect the pipe and the pipe to each other are connected to the pipe end. There are holes on the flanges, and bolts make the two flanges tightly connected. The flanges are sealed with gaskets. Flange is a disc-shaped part, which is the most common in pipeline engineering. Flanges are used in pairs.