Hydraulic hoses like other equipment require maintenance and they have a limited service life. The cost of a hose failure is greater than just the cost of the hose, it can include:
● Clean up, disposal and replacement of lost hydraulic fluid.
● Lose of fluid damage to other components.
● The potential for damage caused by the ingress of contaminants.
● System downtime.
What are some of the causes of hydraulic hose failures?
External damage
► Hose manufacturers estimate 80% of hose failures are the result of external physical damage. The source can be from kinking, crushing, abrading or pulling of the hose. Abrasion from hoses rubbing against one another or adjacent surfaces is the most common.
Bending in multiple planes
► A hydraulic hose bent in more than one plane can see a twisting of its wire reinforcement. 5 degrees of twist can reduce a high pressure hose’s service life by as much as 70%. 7 degrees of twist - a 90% reduction in service life.
Operating conditions
► Operating conditions will ultimately determine a hose's service life. Temperature extremes, e.g. high operating temperatures followed by very cold conditions when not in use will accelerate aging of the hose's rubber tube and cover.
► Frequent and extreme pressure fluctuations accelerate hose fatigue. The application of accumulators in hydraulic service manifolds and at the actuator can help reduce this kind of wear.
Inspect your hydraulic hoses regularly. Replace any that have bubbles in the outer cover or which have cuts or holes in the outer rubber cover. If you are conducting long tests and the tests would be invalid if your equipment failed during the test, consider replacing critical hoses before starting.
● Clean up, disposal and replacement of lost hydraulic fluid.
● Lose of fluid damage to other components.
● The potential for damage caused by the ingress of contaminants.
● System downtime.
What are some of the causes of hydraulic hose failures?
External damage
► Hose manufacturers estimate 80% of hose failures are the result of external physical damage. The source can be from kinking, crushing, abrading or pulling of the hose. Abrasion from hoses rubbing against one another or adjacent surfaces is the most common.
Bending in multiple planes
► A hydraulic hose bent in more than one plane can see a twisting of its wire reinforcement. 5 degrees of twist can reduce a high pressure hose’s service life by as much as 70%. 7 degrees of twist - a 90% reduction in service life.
Operating conditions
► Operating conditions will ultimately determine a hose's service life. Temperature extremes, e.g. high operating temperatures followed by very cold conditions when not in use will accelerate aging of the hose's rubber tube and cover.
► Frequent and extreme pressure fluctuations accelerate hose fatigue. The application of accumulators in hydraulic service manifolds and at the actuator can help reduce this kind of wear.
Inspect your hydraulic hoses regularly. Replace any that have bubbles in the outer cover or which have cuts or holes in the outer rubber cover. If you are conducting long tests and the tests would be invalid if your equipment failed during the test, consider replacing critical hoses before starting.
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