Our workers will select the appropriate billet material according to the flange size specifications, and use cutting equipment (such as sawing machines) to cut the billet into roughly appropriate sizes. The billet is placed in a heating furnace and heated to the appropriate forging temperature range, which varies depending on the type of steel, usually around 1000 - 1200℃.

Workers first make the mold for casting. For sand casting, a sand mold is made, including an upper and lower sand box, in which the flange cavity is made; if it is metal mold casting, the metal mold must be processed first. The selected metal material (such as cast iron, cast steel) is placed in a furnace for smelting. For example, cast iron flanges are generally smelted in a cupola or electric furnace, where the cast iron material is heated to a molten state, and the temperature and chemical composition must be controlled during the process.

First, workers will cut the general shape of the flange on the middle plate by flame cutting or plasma cutting according to the flange size, and reserve a certain amount of processing allowance. The cut flange blank will be processed on the machine tool for bolt holes, water lines, etc., and the flange will meet the finished product standards through drilling on the drilling machine and processing of water lines on the lathe.