Making of the core of the flange

　　The flange gasket is a circular ring that produces plastic deformation and has a certain strength. Most of the gasket is from non metal plate cut down, or by professional factory size, its material is asbestos rubber sheet, asbestos board, polyethylene plate; also useful thin metal plate will wrap up the gasket material made of metal and non-metallic asbestos; and a belt winding and asbestos tape with a thin steel spiral wound gasket

　　Let's take the common national standard Manufacturer Supply Threaded Flange as an example. If we want to make long radius flange, we need to choose the product specification first, then put forward the pipe material, and then do the machining according to the calculated expanding rate. After finishing the basic processing, we need to do a series of finishing work, that is to say, we should further handle the appearance and other details of the products, including shot peening, steel making, surface spraying and packaging.