High-pressure steel wire hose is a key component used to transport high-pressure fluids (such as hydraulic oil, mineral oil, emulsion, etc.) in industrial hydraulic systems. Its performance directly affects the safety and efficiency of equipment operation. The following is a systematic analysis from the aspects of product classification, structural characteristics, technical parameters, application fields and usage specifications.

 

1. Product classification and structural characteristics

High-pressure steel wire braided hose

Structure: It consists of an inner rubber layer, a middle rubber layer, 1-6 layers of steel wire braided layers, and an outer rubber layer. The steel wire braided layer adopts a mesh cross structure to provide basic reinforcement.

Features:

Good flexibility: small bending radius, suitable for installation environments with limited space.

Pressure range: usually 10-200MPa, suitable for medium and low pressure hydraulic systems.

Temperature range: oil medium -40℃ to +100℃, air medium -30℃ to +50℃, water emulsion +80℃ or below.

Specifications: Inner diameter range DN5mm-DN402mm.

High-pressure wire wound hose

Structure: It consists of an inner rubber layer, a middle rubber layer, 2-6 layers of wire wound layers, and an outer rubber layer. The wire wound layer is spirally wound alternately to enhance the pressure bearing capacity.

Features:

High pressure bearing capacity: The maximum pressure resistance can reach 70-340MPa, suitable for high-pressure hydraulic systems.

Excellent pulse resistance: It can still maintain stability under high-frequency pressure fluctuations.

Temperature range: -30℃ to +120℃, suitable for high temperature conditions.

Specifications: Inner diameter range DN6mm-DN305mm, some manufacturers can customize larger diameters.

2. Technical parameters and performance indicators

Working pressure and bursting pressure

Wire braided hose: Working pressure 10-42MPa, bursting pressure is usually 3-4 times the working pressure.

Wire wound hose: Working pressure 40-140MPa, bursting pressure can reach 4-5 times the working pressure.

Bending radius

Wire braided hose: The minimum bending radius is 9-12 times the outer diameter of the hose.

Wire wound hose: The minimum bending radius is 12-15 times the outer diameter of the hose.

Media resistance

Oil resistance: The inner rubber layer is made of nitrile rubber (NBR) or chloroprene rubber (CR), which has good tolerance to mineral oil, hydraulic oil, etc.

Corrosion resistance: The outer rubber layer is made of chlorosulfonated polyethylene rubber (CSM) or chloroprene rubber, which can resist ozone, ultraviolet rays and mild chemical corrosion.

Pulse performance

Under 133% working pressure, the wire wound hose can withstand more than 500,000 pulse cycles, and the wire braided hose can withstand more than 200,000 cycles.

III. Application areas

Engineering machinery

The hydraulic system of equipment such as excavators, loaders, cranes, etc. is used to transport high-pressure hydraulic oil.

Mining equipment

Mine hydraulic supports, tunneling machines, etc., are subject to high pressure and harsh working conditions.

Oil extraction

Drilling platforms, cementing equipment, etc., convey high-pressure mud or hydraulic oil.

Metallurgy and forging

Hydraulic presses, presses and other equipment, withstand high-frequency pulse pressure.

Ships and aviation

Ship hydraulic systems and aircraft fuel systems require hoses to have high reliability and corrosion resistance.

IV. Usage specifications and precautions

Installation requirements

Avoid twisting: Do not twist the hose forcibly during installation, otherwise it will cause fatigue fracture of the steel wire layer.

Bending radius: Ensure that the bending radius of the hose is not less than the minimum allowable value to avoid damage to the skeleton layer.

Fixation and support: Use pipe clamps or brackets to fix the hose to reduce vibration and friction.

Use environment

Temperature control: Avoid long-term exposure of the hose to an environment exceeding the allowable temperature, otherwise it will accelerate aging.

Media compatibility: Ensure that the conveying medium is compatible with the inner rubber layer material of the hose to avoid chemical corrosion.

Maintenance and inspection

Regular inspection: Check whether there are cracks, bulges, exposed steel wires, etc. on the outer surface of the hose.

Pressure test: Perform pressure tests regularly to ensure that the pressure bearing capacity of the hose meets the requirements.

Replacement cycle: It is recommended to replace the hose every 2-3 years, and the specific cycle is adjusted according to the use conditions.

Storage requirements

Temperature and humidity: Storage temperature 0-35℃, relative humidity ≤80%, avoid direct sunlight.

Coiling method: Hoses with an inner diameter of ≤76mm can be stored in coils, and the inner diameter of the coil is not less than 15 times the inner diameter of the hose.

Stacking height: The stacking height does not exceed 1.5m to prevent the bottom hose from being compressed and deformed.