The hydraulic expansion consists in making a tube/plate seal to allow the tubes to be pressurized.
The hydarulic expansion process is as follows:
- Inserting the probe into the tube
- Activation of the trigger
- Water is injected into the probe
- The pistons are pressed against the seals (tube/string contact)
- Pressurization and pressure increase
- Pressure decrease and purging of the system
- Withdrawal and beginning of a new cycle