Causes and preventive measures of failure of hydraulic hose

There are thousands of reasons why hydraulic hoses fail, but with proper precautions, the most common failures can be avoided.

Fluid compatibility

Incompatible fluids will cause deterioration, expansion and delamination of the inner layer of the hose assembly.In some cases, the inner lining may also be partially destroyed.The hose must be compatible with the fluid being transferred.Ensure that the fluid is compatible not only with the inner rubber layer, but also with the outer rubber layer, joints and even o-rings.

2. Dry air/stale air

The inner lining of the hose may produce many small cracks due to stale or dry air.Sometimes, this type of failure is difficult to detect because the hose can still be flexible, but there are signs of an external leak.

To avoid dry or stale air problems, make sure your hose rating is suitable for extremely dry air.For these applications, a hose with PKR or EPDM inner rubber is preferred.

3. Minimum bending radius

If the minimum bending radius is not met, the hose assembly may fail relatively quickly.

In vacuum or suction applications, if the bending radius is exceeded, the hose may become flat in the bending area.This will hinder or restrict the flow of the medium.If the bending is too severe, the hose may kink.To prevent hose failure with minimum bending radius, the recommended bending radius should be carefully checked.

4. The wear

Hydraulic hoses are subjected to harsh conditions every day, and the effects will eventually show up on the hoses.If not checked regularly, wear and tear may cause the hose assembly to rupture and leak.If there is excessive friction between the hose and an external object or even another hose, it will rub off the coating on the hose and eventually wear away the reinforcement.

Properly assembled and installed hoses will last longer, reducing downtime and maintenance costs.

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