What are the common causes of damage to high-pressure steel-wire-reinforced hoses?

　　What are the common causes of damage to high-pressure steel-wire-reinforced hoses?

　　Poor manufacturing quality

　　 High-pressure steel-wire-reinforced rubber hose The outer layer of the wall thickness is made of acid- and alkali-resistant rubber, while the core consists of (2 to 4 layers) of cross‑woven or spirally wound stainless steel wire. Inferior rubber hoses exhibit the following defects: uneven wall thickness; excessively tight or loose stainless steel wire braiding, or an insufficient number of wire‑strand layers; significant deformation—such as elongation, contraction, or bending—when pressurized; poor sealing at the surface rubber layer, leading to rust on the stainless steel wires; inadequate internal rubber sealing, allowing high‑pressure hydraulic fluid to easily penetrate the stainless steel wire layer; and weak adhesion between the surface layer and the stainless steel wire layer. All these issues reduce the hose’s load‑bearing capacity, ultimately causing rupture at the weakest point in the wall.

　　If the compression allowance and compression rate selected after installing rubber hoses and fittings are inappropriate, or if the fitting’s design, materials, and specifications are not chosen scientifically, the hose and fitting may be compressed either too tightly or too loosely, leading to premature failure at the joint.

　　During installation, if the crimping force is too low—resulting in a loose fit between the fitting and the rubber hose—the hose may slip out of the fitting under hydraulic pressure during initial use. Conversely, excessive crimping can over‑compress the joint, leading to localized damage or cracking of the inner layers of the hose. High‑pressure fluid may then penetrate directly into the stainless‑steel wire braid at the crack, travel along the gaps between the wires to the outer jacket, and spray out at the end, or continue to migrate along the wire braid until it accumulates at a certain point, causing blistering or even rupture of the surface rubber. When assembling the hose and fitting, if the crimping speed is too fast, it can easily cause damage to the inner rubber and failure of the steel‑wire braid, resulting in premature degradation of the hose during service.

　　In addition, an unscientific connector design and poor manufacturing quality can also lead to internal rubber damage. Furthermore, if the connector material is improperly selected, it may deform during the crimping process, compromising crimp quality and shortening the service life of the rubber hose.

　　Incorrect operation

　　Even when quality is assured, improper handling can significantly shorten the service life of rubber hoses. In practice, the vast majority of failures in high-pressure steel‑wire‑reinforced hoses are attributable to incorrect operating procedures.

　　Subject to frequent and intense work-related stress. High-pressure steel-wire-reinforced rubber hose Fracturing typically does not result from excessive static pressure; rather, it is associated with the intensity and frequency of abrupt, shock‑like pressure fluctuations. During operation, hydraulic lines in construction machinery experience repeated sudden increases and decreases in pressure, subjecting the lines to frequent pressure surges. This leads to accelerated degradation of the skeletal seals, bubbling and cracking of the hoses, and leakage at tee fittings. Therefore, during operation, avoid applying excessive force when rotating valve seats; proceed gently and smoothly.

　　The operating temperature of the hydraulic fluid is too high. During mechanical operations in engineering projects, energy losses in the hydraulic system cause the fluid to heat up; combined with ambient temperature—particularly in summer—this can lead to a significant rise in temperature. When the hydraulic fluid operates at elevated temperatures, rubber components age more rapidly, losing elasticity and experiencing reduced hardness and sealing performance, which may result in the natural rupture of rubber hoses. Therefore, during operation, if the hydraulic system exhibits excessively high or rapidly rising temperatures, the underlying causes must be promptly identified and addressed. In summer, especially under continuous working conditions, appropriate cooling measures should be implemented.

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