Problems related to expansion welding of copper materials in shell-and-tube heat exchangers for naval use

In shell-and-tube heat exchangers, it is entirely feasible to use expansion welding between the tube bundle and the tube sheet, especially when naval copper is used as the material. Naval copper possesses excellent corrosion resistance and thermal conductivity, making it highly suitable for heat exchange devices such as oil coolers. The expansion welding process combines the advantages of mechanical expansion joining and welding, enabling improved sealing and strength of the joint. In this process, the tube is first mechanically expanded to fit tightly into the holes in the tube sheet, and then the connection is further strengthened through welding. This method can effectively prevent leaks and improve the overall reliability and durability of the heat exchanger. When applying the expansion welding process, it is important to note that welding parameters such as current, voltage, and welding speed need to be adjusted appropriately based on the specific properties and thickness of the material, in order to ensure the quality and performance of the weld. At the same time, it is also necessary to take into account the thermal expansion coefficient of naval copper to ensure good sealing and structural integrity under various operating conditions. .

Naval copper is not very suitable for oil cooling, as corrosion can easily cause problems in this context