Flange plate is called flange for short, which is just a general term. It usually refers to opening several fixing holes around a metal body similar to a disk to connect other things. It is widely used in machinery, so it has so many looks. As long as it looks like a flange, it is called a flange. Its name comes from the English flange.
There are holes on the flange plate, and bolts can be worn to make the two flanges tightly connected. The flange is sealed with a spacer. Flange pipe fittings refer to the fittings with flange. It can be cast or forged, and it can also be made of threaded connection or welding. The flange plate connection consists of a pair of flanges, a spacer, and several bolts and nuts. The spacer is placed between the two flange sealing surfaces. After the nut is tightened, the specific pressure on the gasket surface reaches a certain value, which causes deformation, and fills the uneven parts on the sealing surface, so that the connection is tight. Some pipe fittings and equipment have their own flange, which also belongs to flange connection. Flange connection is an important way of pipeline construction.
The automobile flange is to increase the distance between two coaxial wheels, which can make the wheel outline out a bit. Wheel hub, also known as wheel rim, wheel, and tire bell, is around the barrel-shaped metal part with the inner contour supporting the tire and the center-mounted on the axle. There are many kinds of wheel hubs according to diameter, width, forming method and material. The hub centric wheel spacers are a mechanical seal between two objects, which is usually used to prevent pressure, corrosion between two objects, and natural expansion and contraction of the pipeline.