9. Main sources causing collection of contaminants.
There are several major sources that cause the collection of contaminants, including:
- Leftovers of dirt in pipelines, bearing pedestals and grooves of cooling clusters that were removed
incompletely when preparing a new system,
- Penetration into open bearing pedestals and tanks during downtimes (periodical inspections of technical
condition for subassemblies combined with their disconnection, as well as periodical adding of oil into systems,
i.e. unsealing and ingression of contaminants from the environment as well as in added oil),
- Penetration through oil sealing of stands and tanks in operation,
- Re-circulation from contaminated cleaning systems during improperly conducted maintenance of oil systems,
- Formation of new contaminants from side products, mainly corrosion that is strengthening depending on water
contents in oil,
- Particularly intensive corrosion can be noticed on upper surfaces of run-off pipelines and tanks, where water
is condensing the amount of corrosion products rises, which after sometimes break, fall away and constitute
particles of the solid phase,
- Adhesive abrasion, when surfaces of two bodies contact,
- Cavitation in choking points and in improper conditions of flow in suction pipes (problem of oil's ability to
release oil),
- Erosion in high flow speed,
- Abrasion caused by very small micron particles hitting against working surfaces during flow through gaps, as
a result of repeated strokes, they cause the fatigue breaking of particles in these surfaces,
- In addition, large amounts of sludgy and smoky oil ageing and decomposition products deposit on the walls of
collectors, in a tank in pockets and dead zones of the system that do not destroy the system mechanically, but
catalyse oil ageing processes and are aggressive for metal.
|
 |
