G.P. DEGREASER is a heavy duty emulsifying solvent based degreaser.
How does it work?
G.P. Degreaser contains emulsifiers, surface-active chemicals and petroleum solvents.
These three cleaning actions give the product a very wide range of applications. The solvent gives quick penetration, the surfactants attack stubborn grime, the emulsifiers give effective cleaning of mineral based oils and petroleum based chemicals. G.P. DEGREASER is also rapid rinsing with water.
Use / Benefits:
• G.P. DEGREASER can be used for cargo tank cleaning of mineral oils and petroleum
based chemicals. It can be used for cleaning oil coolers, fuel oil pre-heaters, lube oil
• G.P. DEGREASER can be used for cleaning and degreasing of cooling water systems
prior to descaling.
• G.P. DEGREASER can be used for degreasing double bottom tanks and bilges.
• G.P. DEGREASER is ideally suited for engine room and machinery cleaning. It can
also be used to soak clean parts.
• G.P. DEGREASER can be used for cleaning and degreasing boilers.
Directions for Use:
G.P. DEGREASER can be used undiluted for local cleaning operations by brushing, hand
spray, immersion or soaking. Simply apply undiluted over the soiled area and allow a
contact time of up to 30 minutes before rinsing with water.
For soaking dilute G.P. DEGREASER up to 10 times with water for light soiling, or use
neat for heavy soiling.
For spraying apply neat, scrubbing will assist the cleaning operation.
Cleaning/Degreasing of Boilers
Find the source of contamination and rectify this problem before starting the cleaning
The degree of oil contamination will determine the required solution strength. Between
2-10% of G.P. DEGREASER in water is suggested. For heavy contamination, up to 20%
solution may be required, e.g. 1% solution is 10 litres per 1000 litres water.
Dose the required amount of solution through the steam drum manhole. Re-secure steam
drum manhole cover, vent air valve on steam drum.
Boiler can now be fired for 4 minutes then shut down for 10-20 minutes. Keep repeating this process until the solution has reached a temperature of 50-60°C. Repeat this operation for 12-18 hours keeping the solution at the optimum temperature which will promote agitation and circulation of liquid to give better cleaning efficiency.
Drain down boiler by opening all drain valves and removing manhole covers. Use a high pressure hose to flush drums, tubes and headers starting at the top. After flushing boilers, secure and refill.
Degreasing Marine Diesel Engine Cooling Water Systems
When diesel engine cooling water systems become contaminated with oil and grease, the
system should be cleaned to remove oily deposits as they can interfere with the cooling
water corrosion treatment.
In Service Cleaning
This method may be undertaken with engine running at normal speed.
Take 0.25 litre cooling water sample for future comparison and allow it to stand in a clear
Calculate the amount of G.P. DEGREASER required for a solution of 0.7% i.e. 7 litres per
1000 litres in cooling water system. Drain off similar amount of cooling water from engine
if necessary. Slowly and intermittently, add the cleaner to the cooling system via either the
expansion or return tank.
After 5 hours, take 0.25 litres of cooling water sample, this should be allowed to stand in a
clear glass container until any oil has risen to the top. By comparing the thickness of this
A sample should be take every 5-6 hours to monitor cleaning process.
The cleaner should be left in the engine for a few days until a convenient port is reached.
Drain off the complete engine cooling system and thoroughly flush with clean water prior to re-filling with water of the required quality, to which an appropriate anti-corrosion treatment should be added, such as CORROSION CONTROLLER C.W.T or Aquamarine Aluminium Corrosion Controller XLI.
Out of Service Cleaning
This method may be used when engine is stopped.
Take a 0.25 litre sample of cooling water for future comparison and allow it to stand in a
clear glass container.
Drain the cooling system and flush out with water. Then refill the system.
Calculate the amount of cleaner required for a solution strength of 2% i.e. 20 litres per
1000 litres of cooling water. Drain off similar amount of cooling water from engine if
necessary. Add G.P. DEGREASER.
Circulate the solution through the system and heat until the water reaches a temperature
Continue circulation of the solution through the system for a minimum of 5 hours.
Take a sample of the cleaning solution and compare with sample taken at the beginning to
ascertain that cleaning is completed.
When cleaning is complete, drain off the cooling water system and thoroughly flush with clean water, prior to re-filling and adding an anti-corrosion treatment, such as CORROSION CONTROLLER C.W.T or Aquamarine Aluminium Corrosion Controller XLI.
Cleaning of the Oil Side of Lube Oil Heat Exchangers
Cleaning is best done by the recirculating method using a heated 20% solution of G.P.
Isolate the oil supply and disconnect the heat exchanger oil inlet and outlet and drain off
any oil remaining.
Connect the discharge side of a portable pump to the lower heat exchanger connection
and the suction side of the pump to the bottom outlet of a 200 litre drum.
Complete the circuit by connecting the upper connection to the top of the drum.
Add the required solution to the drum and arrange an immersion heater or live stream
within the drum to raise the temperature of the cleaner to 65-75°C and maintain the level
throughout the cleaning operation.
If it is not possible to heat the operation will need to be extended.
Use the pump to maintain circulation for 12-15 hours. When the cleaning is completed
disconnect the lower heat exchanger and drain out cleaner.
Connect a high pressure fresh water supply to the upper heat exchanger connection and
rinse until the water runs clean from the lower connection.
When rinsing is complete disconnect the high pressure water supply and thoroughly drain
and dry the heat exchanger.
Cargo Tank Cleaning After Mineral Oils
Direct injection into tank washing machines is recommended. A dose rate of between
0.1-2.0% i.e. 1 litre to 20 litres per tonne wash water. Best results are obtained when water
is heated to a temperature between 65-80°C and not less than 50°C. Slops should be
constantly stripped from the tank and transferred to a holding tank or pumped ashore to
Recirculation method of cleaning using tank washing machines is recommended at a
strength of 0.5-3.0% mixed in tank to be cleaned. Best results are obtained when
water is heated to a temperature between 65-80°C and not less than 50°C. Dose rate and
results will vary depending on amount of contamination and number of tanks cleaned with
this solution. After cleaning slop water should be pumped ashore or to ship’s slop tanks.
For spot cleaning G.P. DEGREASER can be sprayed neat over tank surfaces to be
cleaned and left for at least 30 minutes and up to 2 hours if time allows. Wash down tank
walls using tank washing machines or high pressure hoses. Best results are achieved with
hot water at a temperature between 65-80°C. Keep stripping tank slops and transfer to
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