DE-WATERING

a) Blowing/Drying

1. Verify to ensure that pressure test has been completed.
2. Ensure that water flushing has been completed.
3. Ensure that the test medium has been drained upon completion of the hydro test.
4. Ensure that no water is trapped in the system.
5. Ensure that blowing medium/compressed air humidity is −30°C.
6. Ensure that all the blowing point humidity is −10°C.
7. Ensure that permit to work or HSE authorization is in place.
8. Record data as below:

   Parameter	Reading	Remarks
   Pressure Test Completion
   Water Flushing Completion
   Hydro Test Medium Drained
   Residual Water Check
   Compressed Air Humidity (−30°C)
   Blowing Point Humidity (−10°C)
   Permit to Work / HSE Authorization