Automotive Power Steering Hose Assemblies for Hydraulic Systems

System Components

• High Pressure Hose

• Connects the power steering pump to the steering gear

• Withstands high pressure (typically 8–15 MPa) and pulsation loads

• Structure: oil-resistant inner tube + reinforcement layer (steel wire braid/fabric) + heat- and ozone-resistant outer layer

• Return Hose

• Connects the steering gear to the reservoir

• Low-pressure line ensuring smooth fluid return

• Typically rubber hose or nylon tube

• Hard Lines (Steel / Aluminum Tubes)

• Used for fixed routing or space-constrained areas

• Materials include plated steel tube, aluminum tube, or coated steel tube with strong corrosion resistance

• Fittings & Assemblies

• Connected by crimping, welding, or flange fittings

• Ensure sealing performance and pressure resistance

Key Features

• High pressure and pulsation resistance (compliant with SAE J188, SAE J2050 standards)

• Wide temperature range: -40°C to +135°C (up to +150°C for specific applications)

• Excellent fluid resistance: compatible with ATF, PSF, and other steering fluids

• Aging and ozone resistance: service life over 8–10 years

• NVH optimization: optional dampers or silencers integrated into hoses to reduce steering noise and vibration

Applications

• Passenger vehicles (sedans, SUVs, MPVs)

• Commercial vehicles (light, medium, and heavy-duty trucks, buses)

• Special vehicles (construction machinery, agricultural equipment, etc.)

Manufacturing & Testing

Manufacturing Process: extrusion, braiding, tube bending, assembly, crimping, surface coating and anti-corrosion treatment

Testing Capabilities:

• Burst test

• Impulse fatigue test

• Salt spray test

• Leakage test (air and fluid)

• Dynamic fatigue and durability test

Development Trends

• Lightweighting: transition from steel tubing to aluminum or composite tubing

• Adaptation to Electrification: although EPS (Electric Power Steering) is increasingly adopted in passenger cars, hydraulic power steering hoses remain widely used in commercial vehicles and certain passenger models

• Eco-friendly materials: low-VOC and recyclable materials

• Integration: hoses designed with integrated dampers, silencers, or brackets for compact system layouts