• Analysis of several main causes of hydraulic hose failure

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

1. The inner rubber layer is corroded.

Corrosion of hydraulic hoses often leads to external leaks.Corrosion of the inner adhesive layer is usually caused by concentrated high-speed fluid or small particles in the fluid.

In order to avoid corrosion of the inner rubber layer, the appropriate hose size should be determined according to the recommended high flow rate. In addition, it should be ensured that the hose assembly does not bend too tight and the fluid medium does not wear the inner rubber layer too much.It is important to assemble hoses in accordance with the larger bending radius and diameter requirements specified in each hose engineering specification.

2. Fluid compatibility.

Incompatible flow can cause deterioration, swelling and delamination of the hose assembly inner layer.In some cases, the inner adhesive may also be partially damaged.The hose must be compatible with the fluid being transferred.The fluid is compatible not only with the inner rubber layer, but also with the outer rubber layer joints and even type 0 rings.3 Dry air/used air.

There may be many small cracks in the hose lining due to obsolescence or dry air.Sometimes such failures are hard to spot because the hose remains soft, but there are signs of an external leak.

In order to avoid dry or obsolete air problems, it is necessary to confirm that the hose evaluation is suitable for extremely dry air.In these applications, hose with EPDM internal rubber material is preferred.If possible, the air dew point must be raised.

4. Small bending radius.

If the small 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 flatten in the bending area.This will block or limit the flow of the medium.If the bending is too severe, the hose may twist.To prevent hoses with small bending radius from failing, carefully check the recommended bending radius.5 is the insertion depth.

If the hose assembly is not properly crimped, this can be a very dangerous situation. In order to meet the recommended insertion depth requirements, the joint must be fully pushed against the hose. The grip force of the back ring of the joint housing is important for the hose to maintain strength

In order to find the correct insertion depth, an accurate production process is developed to ensure that the hose is pushed to the correct insertion specification

6. Improper assembly.

Contamination can cause problems for fluid hydraulic hose assemblies.Metal particles and debris may be deposited in hoses if they are not properly flushed when cutting.This residual abrasive in the hose can contaminate the hydraulic system.In addition, it can cause small cracks and leaks in the piping inside the hose assembly.

To prevent hose failure due to contamination, the hose must be cleaned before being inserted into the connector.Before casting into the joint, the inner tube should be clean, after the assembly is finished, dust cap should be installed to protect

Clean with hose to avoid secondary pollution during transportation.

7. Thermal aging.

Hose failure can also result from overheating of the hose assembly, which can cause the hose to harden.The internal hose will harden and begin to open, as the adding agent in the strong body will begin to decompose or harden at high temperature

.In some cases, overburden may show signs of excessive dryness.After the hose assembly is removed, it may retain the shape it was installed in.If you bend, you hear a cracking sound.To prevent the hydraulic hose assembly from overheating, check the rated temperature of the hose for the station temperature requirements.In addition, lowering the ambient temperature or using a guard and shield can protect the hose from nearby hot areas.

8. Wear and tear.

Hydraulic hoses are exposed to harsh conditions every day, and the effects can show up on the hoses.If not checked regularly, wear can cause the hose assembly to break and leak.If the hose is rubbed excessively against external objects or even other hoses, the coating on the hose will wear away and the reinforcement will wear away.