In this industry, metals are produced in various forms such as sheets, rods (rounded or rectangular), coils or wires, which will be processed further more in each industry. The common steps of metal production include continuous casting, hot strip rolling mill, pickling, cold strip rolling mill, and annealing. Persistent and efficient cooling and temperature control of service fluids at each step (water, lubricant oil, hydraulic oil, thermal oil, water and oil mixture, etc.) will guarantee high quality of output product. Therefore, heat exchangers play a vital role in each of these steps.