Production Process and Usage Precautions for High-Pressure Steel-Wire-Braided Rubber Hoses

​　　 High-pressure steel wire-reinforced hose It is primarily used in hydraulic supports for mining and oilfield extraction, and is suitable for construction projects, lifting operations, mining equipment, various machine tools, and mechanization across diverse industrial sectors. Next, let’s examine the production process of high-pressure steel‑wire‑reinforced rubber hoses and the precautions for their use.

　　I. Production Process for High-Pressure Steel-Wire-Braided Rubber Hoses

　　1. The inner rubber, intermediate rubber, and outer rubber are blended in a mixer according to the formulation; the inner tube is extruded and coated onto a soft or rigid core that has been treated with a release agent.

　　2. The calender presses the rubber sheet into the intermediate layer, and with the separator in place, the material is rolled to the specified width according to process requirements.

　　3. The process involves winding copper‑plated steel wire or copper‑clad steel wire onto a winding machine or knitting machine, while simultaneously wrapping an intermediate adhesive film between each pair of layers or over the copper‑clad steel wire; the copper‑clad steel wire is secured with ties at both the beginning and end of the winding.

　　4. Then apply adhesive to the exterior of the extruder and wrap it with a lead or fabric vulcanized protective layer.

　　5. Vulcanization is carried out using a tank or a salt bath.

　　6. Remove the vulcanization protective layer, extract the tube core, crimp the tube fitting, and perform sampling and pressure testing. In summary, the production of high-pressure hydraulic hoses involves numerous pieces of equipment, a wide variety of raw materials, and a complex manufacturing process. However, in recent years, the production process for hydraulic hoses made primarily from plastics or thermoplastic elastomers has been somewhat simplified; yet, these alternative materials are more expensive, and rubber remains the predominant raw material.

　　II. High-pressure steel wire-reinforced hose Precautions for Use

　　1. High‑temperature, high‑pressure steel‑wire‑reinforced hoses have a significantly shortened service life when exposed to elevated ambient temperatures. Therefore, keep them as far away from heat sources as possible; if necessary, use armored hoses or install thermal insulation panels to prevent overheating and subsequent degradation of the hose.

　　2. Avoid surface friction: During installation and operation, ensure the hose does not come into contact with other pipes to prevent friction‑induced rupture. If cross‑over or operational friction is unavoidable, use protective devices such as hose clamps or spring‑loaded guards.

　　3. Bending: During installation, the hose must be bent to ensure that the minimum bending radius R is ≥ (9–10)D (where D is the outer diameter of the hose), and that the straight‑bend section extending from the fitting is longer than six times the hose’s outer diameter.

　　4. When installing high-pressure steel‑wire‑braided hoses, do not tighten them during installation; leave an appropriate length of slack. Even if there is no relative movement at either end, the hose should remain relaxed. When the hose is compressed, its length and diameter will change; consequently, a stretched hose subjected to pressure will expand, leading to a reduction in its strength.

　　5. During installation, avoid deforming the hose; even slight torsion can reduce its strength or loosen the fittings.

　　6. The bend in the hose and the hose fittings should be aligned on the same plane to prevent torsion. In special cases where the fittings at both ends of the hose must lie on different planes, a clamp should be installed at an appropriate location to divide the hose into two sections, ensuring that each section remains in the same plane.

　　7. If the key components are equipped with hoses, it is recommended to inspect or replace them regularly.

　　Two. High-pressure steel wire-reinforced hose Key factors affecting service life:

　　Assess whether the product quality has reached proper vulcanization, and determine whether it exhibits under‑vulcanization or over‑vulcanization. Improper vulcanization during production can result in substandard product performance, uneven wall thickness in rubber hoses, and adverse effects on the inner rubber layer.