As iron plate welding flanges, many customers questioned whether the quality of the iron plate welding flange outweighs the forged welding flange. In fact, the quality of the welded flange of the iron plate is the same as the quality of the forged welding flange, but the iron plate welding flange cannot be protected in any place. That is, the material of the iron plate welding flange is the most unprotected, because In the general process, the density of the welded flange of the iron plate is not a problem. However, during the production process, the blanks of the welded flange of the iron plate are rarely detected. Therefore, after being produced, the thickness is not passed. The material of the welded iron flanges tested cannot be guaranteed.