Oil hoses - operation, storage and replacement intervals
dreizler A 3001 E - 18.12.2015 | A 2074 - 1.12 | EN - 09.11.2012
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20 Oil hoses - operation, storage and replacement intervals
The characteristics and the lifetime of oil hoses and their gaskets may be changed especially by increased
temperature, Ozone (e.g. in the vicinity of welding work stations) and UV-exposure and by other chemical
reactions on the inside and outside. Oil hoses are wearing parts.
The maximum replacement interval for oil hoses is five years. Depending on use, state and hazard poten-
tial, shorter replacement intervals of two years, respectively one year on installations with high utilization of
the oil hoses, are recommended by dreizler
®
. This refers both to the oil hoses in the oil supply (typically in
the pressure range up to 5 bar) and to the oil hoses mounted externally and internally to the burner on the
high pressure side of the burner oil pump, respectively in the return of the oil lances.
NOTICE:
The condition of the oil hoses has to be checked after every 4000 operation hours or at least once per year.
20.1 Criteria for the replacement
The criteria for the replacement of the oil hoses are in particular:
•
The age of the oil hoses is older than maximum 5 respectively 2 or 1 year depending on the application
•
Any type of leaks
•
Any type of increased pressure loss in operation
•
Apparent embrittlement, loss of flexibility or deformation
•
Obvious mechanical damages on the outside of the oil hoses
20.2 Storage conditions
For oil hoses which are stored at the facility, there are the following storage conditions:
•
Cool, dry storage room, dust-free and moderately ventilated. No outdoor storage.
•
Storage temperature should range from -10°C up to maximum 25°C.
•
Protection against UV exposure, especially sunlight or strong artificial light.
•
No Ozone content in the atmosphere.
•
No storage together with solvents, lubricants or other chemicals.
•
Oil hoses should be stored stress-free (without deformation).
•
Pressed hoses (finished oil hose) must not be stored longer than 2 years. The storage time is deducted
from the lifetime.
