4. Commissioning
Commissioning of the oil cooler should not be undertaken until this document has
been fully read and understood. Both circuits of the oil cooler must be
closed prior to commissioning.
Adequate provision should be made to ensure that correct operating/service
equipment along with personal protection equipment (PPE) in accordance with
current standards/legislation is used prior to the commencement of any working.
Cooling water should be introduced to the oil cooler prior to the gradual introduction
of hot oil. Both circuits should be vented initially and again when operating
temperatures and pressures are reached. The system should be checked for leaks.
2
8
Danger
Take Care
Copper-nickel alloys have a very good resistance to seawater corrosion due to
the formation of a thin protective lm on the surface of the metal. This lm starts
to develop over the rst few days after the metal has been in contact with clean,
oxygenated seawater, and requires a further 3 months to develop fully. This is the
most important part of the process to ensure long term corrosion resistance
behaviour of copper nickel. The protective surface lm of cuprous oxide is
indicated by either a brown, greenish brown or blackish brown thin lm layer. The
process of ensuring that copper alloy receives an eective oxide coating prior to
service is known as “conditioning” which is a very important stage for the alloy.
Ferrous sulphate can be used if commissioning in clean sea water is not possible.
Schedule cleaning may help to reduce the risk possibly with non-metallic brushes.
Please refer to Copper Alliance webpage for more information: www.copper.org.
5. Maintenance / Repair
5.1 Winter shutdown in areas exposed to frost
Care should be taken to prevent frost damage from a winter shutdown in conditions exposed
to frost. We recommend draining down the oil cooler or removing the it completely from the
installation for the duration of the shutdown period.
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