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2021
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09
What are the causes of failure during the use of steel braided hoses
Source:
Steel wire braided hoses are often used in equipment hydraulic systems, and when used, it depends mainly on the internal and external temperature and the fluid conveyed, which will be divided into different areas. So what are the causes of failure of hydraulic hoses when in use.
1、Fluid compatibility
Incompatible fluids will cause deterioration, expansion and delamination of the rubber layer in the hose assembly, and in some cases, the internal adhesive layer may also be partially damaged. The fluid should be compatible between the hose and the fluid conveyed. The fluid should be compatible not only with the internal rubber layer, but also with the external rubber layer, the joint and even the O-ring.
2、Dry air/not fresh air
Due to air aging or dryness, the internal rubber layer of the hose may produce many tiny cracks. Sometimes this type of failure is difficult to detect because it can still remain flexible, but there will be signs of external leakage.
To avoid problems with dry or non-fresh air, you should first confirm that the wire braided hose grade is suitable for dry air. For these applications, hose with PKR or EPDM inner rubber material can be selected.
3、Bending radius
If the bend radius is not met, the hose assembly may fail relatively quickly. In vacuum or suction applications, if the bend radius is exceeded, it may flatten out in the bend area, which will impede or restrict the flow of media. If the bend is too strong it may kink. To prevent failure due to the bend radius, the recommended bend radius should be carefully checked.
4、Abrasion
Hydraulic hoses are commonly used in harsh environments, and their effects will show up on the tube body. If not checked regularly, wear and tear may lead to component rupture and leakage. If the hose rubs excessively with external objects or even between another tube body, the coating on the tube body will be worn off, causing the reinforcement layer to wear off.
Wire braided hoses are quite practical and solve many of life's problems. Properly assembled and installed hoses will have a longer life, thus reducing downtime and maintenance costs.