BL flange manufacturers believe that the production process is mainly divided into four types: forging, casting, cutting and rolling.

　　(1) BL flange manufacturers share casting flanges and forging flanges

　　BL flange manufacturers found that the cast flanges have accurate shape and size of blanks, small processing volume and low cost, but there are casting defects; the internal organization of castings is less streamlined; forged flanges generally have lower carbon content than cast flanges and are not easy to rust. Forgings have good streamline shape, dense structure and better mechanical properties than cast flanges; improper forging process will also cause large or uneven grains, hardening cracks, and forging costs are higher than cast flanges.

　　BL flange manufacturers believe that forgings can withstand higher shear and tensile forces than castings; the advantage of castings is that they can produce more complex shapes and the cost is relatively low; the advantages of forgings are that the internal structure is uniform, and there are no pores in the castings , inclusions and other harmful defects; BL flange manufacturers distinguish the difference between casting flanges and forging flanges from the production process. For example, centrifugal flanges are a type of casting flanges.