Questions about Tube & Shell Passes, Working & Design Pressure of Heat Exchanger

1. What is the tube pass and shell pass of the heat exchanger ?
The tube pass is the part of the heat transfer tube channel through which medium flows and passes that connects one another. The shell pass is the part of the channel that medium flows through the outside heat transfer tube and the part that connects one another.

2. What is the number of tube passes and shell passes of a heat exchanger?
The number of tube passes refers to the number of times the medium travels back and forth along the length of the heat exchanger tube; the number of shell passes refers to the number of times the medium travels back and forth along the shell in the shell side.



3. What is the working pressure of the heat exchanger?
Working pressure refers to the highest pressure that the heat exchanger tube passes and the top of the shell passes may reach under normal working conditions.

4. What is the design pressure of the heat exchanger?
Design pressure refers to the maximum pressure of the set heat exchanger tube passes and the top of the shell passes. It is regarded as a design load conditions, together with the corresponding design temperaturethe, whose value shall not be lower than the working pressure.