Key Considerations for the Working Pressure of High-Pressure Hoses

Release date:

2021-08-17

Author:

Each high-pressure hose has a specified working pressure, and its burst pressure is typically 3 to 4 times the working pressure. The higher the pressure, the more layers of reinforcement are required, and the stricter the manufacturing standards become. Therefore, based on the system’s actual operating pressure, selecting a high-pressure hose with a higher rated working pressure ensures normal system operation, allowing for appropriate use of the hose.

　　Each high-pressure hose has a specified working pressure, and its burst pressure is typically 3 to 4 times the working pressure. The higher the pressure, the more layers of reinforcement are required and the stricter the manufacturing standards become. Therefore, based on the system’s actual operating pressure, selecting a high-pressure hose with a higher rated working pressure ensures proper system operation, allowing for appropriate use of the hose.

Key Considerations for the Working Pressure of High-Pressure Hydraulic Hoses

　　1. The temperature of the conveyed medium in high-pressure hoses must not exceed the manufacturer’s specified limits: feedstock oil, –40 to 120°C; gases, –30 to 50°C; water‑based emulsions, below 80°C.

　　2. High-pressure tubing must be kept clean, with its interior thoroughly cleaned. This prevents foreign debris from entering the downhole tubing, which could obstruct fluid flow and damage the equipment.

　　3. The routing of high-pressure hoses should, wherever possible, avoid heat sources; where necessary, waterproof sleeves or thermal insulation materials may be installed to prevent the hoses from coming into contact with hot surfaces.

　　4. In areas where high-pressure hoses cross or come into friction with the surfaces of mechanical equipment, protective measures shall be implemented to prevent the rubber hoses from rupturing due to damage.

　　5. High-pressure hoses should be kept as vertical as possible on site, and sharp bends should be avoided during bending; the bending radius must not be less than nine times the hose diameter. At the junction between the hose and the fitting, a straight section at least twice the hose diameter in length is required.

　　6. Before installing the high-pressure hose, do not twist it. Even slight twisting can reduce its compression strength and cause the fittings to loosen. On the assembly line, tighten the plastic hose onto the hose itself, rather than screwing the plastic hose onto the fitting.

　　7. When installing high-pressure hoses, avoid over‑tightening; allow for some slack to ensure the hose remains relaxed.

　　8. During routine use, ensure the hose is protected to prevent crushing, deformation, or breakage.

　　9. When controlling gate valves in real time, adjust gently to minimize pressure surges on the hose and prevent rupture.

　　10. High-pressure hoses must be fitted with reliable auxiliary components, including “U”-shaped clamps, sealing rings, measuring cylinders, T‑shaped fittings, and the like; the use of any other substitutes is prohibited.

　　11. When high-pressure hoses exhibit leakage, cracks, bulging, rust on fittings, broken stainless steel wires, or brittle and cracked adhesives, they must be replaced immediately.

　　12. During routine use, high-pressure hoses must be regularly inspected and replaced as needed.

　　The advent of high-pressure hoses has brought us tremendous convenience; however, accidents can still occur during use. To prevent such incidents, first, conduct regular safety training to instill a strong safety consciousness among workers. Enhance the operational skills of maintenance technicians through rigorous hands-on practice. Hydraulic support maintenance personnel must thoroughly understand the various systems and operating principles of hydraulic supports, ensuring precise, swift, and correct operation. After taking over a specific task, they should verify that pressure gauges are functioning properly, that initial support forces meet specified requirements, and inspect TEM hydraulic supports for proper actuation, operation, leakage, and pipeline integrity, as well as for secure connections, effective U‑shaped pins, and adequate inter‑frame spray‑cooling.

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