Structural Advantages and Disadvantages of Tubular Heat Exchangers

In order to overcome temperature difference stress, a temperature difference compensation device is necessary. Generally, when the temperature difference between the pipe wall and the shell wall is more than 50 ℃, for safety reasons, the heat exchanger should have a temperature difference compensation device. But the compensation device (expansion joint) can only be used in situations where the temperature difference between the shell wall and the pipe wall is less than 60-70 ℃ and the fluid pressure on the shell side is not high. When the shell side pressure exceeds 0.6Mpa, due to the thickness of the compensation ring, it is difficult to expand and lose the function of temperature difference compensation. Therefore, other structures should be considered.