Tube plates, which are circular steel plates with slightly larger holes than the tube outer diameter, serve as round bars in heat exchangers for securing tubes and sealing media. These plates are a type of fitting used to穿管焊接 and provide such a function. The precision of the tube plate processing, especially the tube hole spacing and tube diameter tolerance, as well as the perpendicularity and finish, all affect the assembly and operational performance of the listed chemical equipment.