ABB TPL65-A32 Operation Manual page 62

Wet cleaning interval
Cleaning method
Principle of wet cleaning
CAUTION
NOTICE
CAUTION
V-engines
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Operation Manual / TPL65-A32 / -A33 / -A36 + TPL69-A32 / -A33
Maintenance
Cleaning turbine blades and nozzle ring
in operation
The interval between periodic cleaning is very dependent on the operating
conditions. In general, cleaning should be carried out every 50 to 200
operating hours.
When cleaning the turbine components during operation, use wet
cleaning. This cleaning method has been tested and approved by ABB
Turbo Systems.
Prerequisites for wet cleaning are that the engine builder approves the
process and his instructions are followed.
During wet cleaning using droplets of water, the water does not act as a
solvent. Instead, the deposit is removed by the mechanical impact of the
drops.
Corrosion and deposits when cleaning
Damage and impairment of turbocharger parts due to salt water and
cooling water additives
Don't use salt water for cleaning, but only clean fresh water.

Components at the turbine end are not cleaned until the engine has
been started or the engine load reduced. The exhaust gas temperature
must not exceed the value specified in the respective cleaning
instructions. (See respective section Operating state prerequisites.)
Non-observance of the specified exhaust gas temperature in front of the
turbine, the minimum stabilising time before as well as between
cleaning operations and the drying time after cleaning in accordance
with the pertaining cleaning instructions drastically shortens the
expected service life of components.
For V-engines with several turbochargers on each engine, we recommend
parallel cleaning of both turbochargers. This cleaning process is faster
and the risk of turbocharger surging is reduced. We recommend
conducting tests to find the most suitable method.
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