Hydraulic Hose

Industrial Hydraulic Hoses & High-Pressure Fluid Lines for OEM Equipment

Flexible high-pressure hydraulic hoses for fluid, lubricant, and water-glycol transmission in heavy machinery, mobile equipment, and industrial circuits. Built with oil-resistant synthetic inner tubes, high-tensile steel wire reinforcement layers, and abrasion-resistant outer covers to withstand severe pressure cycles and harsh operating environments.

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Technical Selection Parameters Table

Parameter Metric	Wire Braid Hose (2SN)	Spiral Hose (4SP)	Heavy Spiral Hose (4SH)
Reinforcement Type	2 Steel Wire Braids	4 Spiral Steel Wire Layers	4 Heavy Spiral Steel Wire Layers
Size Range (ID)	1/4 inch to 2 inch	3/8 inch to 2 inch	3/4 inch to 2 inch
Max Working Pressure	Up to 41.5 MPa (depends on size)	Up to 45.0 MPa	25.0 MPa to 42.0 MPa
Min Burst Pressure	4 times working pressure ratio	4 times working pressure ratio	4 times working pressure ratio
Operating Temp Range	-40°C to +100°C	-40°C to +100°C	-40°C to +120°C
Inner Tube Compound	NBR Synthetic Rubber	NBR Oil-Resistant Rubber	NBR High-Performance Rubber
Outer Cover Compound	Abrasion-Resistant Rubber	MSHA Approved Rubber	MSHA Approved Heavy Rubber

Industrial Applications

Construction and Earthmoving Machinery: Installed in excavator boom arms, bulldozer blade tilt circuits, and wheel loader auxiliary lines subjected to heavy vibration and shock loads.

Agricultural Equipment: Powers hydraulic steering systems, combine harvester header lifts, and tractor remote valve hookups.

Industrial Manufacturing: Connects hydraulic power units to stationary stamping presses, injection molding machines, and automated die-casting equipment.

Material Handling and Mining: Used in forklift hydraulic lift cylinders, mining support frames, and underground drilling rigs requiring high burst resistance.

Quality Control Before Shipment

Every production batch of hydraulic hoses undergoes strict physical and mechanical testing before packaging and export:

Impulse Pressure Testing: Hose samples run on dynamic test rigs at 133% of maximum working pressure at +100°C oil temperature to verify impulse cycle life.

Proof Pressure Testing: 100% of manufactured hose lines undergo proof pressure testing at twice the rated working pressure for 30 to 60 seconds to detect any weak points.

Dimensional Inspection

Laser micrometers measure inner diameter, wall thickness, and outer diameter concentricity to ensure strict compatibility with standard crimp fittings.

Adhesion Testing

Tensile testing machines measure the rubber-to-wire adhesion strength to ensure layers do not separate under continuous bending.

Low-Temperature Test

Cold bend testing is conducted at -40°C to verify that the outer cover and inner tube maintain flexibility without cracking.

Custom Hose Assemblies and Components

For OEM clients requiring plug-and-play fluid delivery lines, pre-assembled hose configurations are available:

Custom Cutting and Crimping

Hoses cut to precise lengths with factory-matched carbon steel or stainless steel fittings (JIC, NPT, BSP, ORFS, and metric DIN flanges).

Protective Sleeve Integration

Installation of fire-sleeve, spring guards, or abrasion-resistant plastic wrap for high-wear application zones.

Cleanliness and Sealing

Internal flushing and end-cap sealing to maintain ISO fluid cleanliness standards prior to shipping.

FAQ

Q: What is the difference between wire braid and wire spiral hydraulic hoses?

A: Wire braid hoses (such as 1SN/2SN) use braided steel wire layers, making them flexible and suitable for medium to high-pressure lines with tighter bend radii. Wire spiral hoses (such as 4SP/4SH) use multiple layers of heavy spiral steel wire, providing superior resistance to high-frequency pressure impulses and extreme operating pressures.

Q: How do I determine the correct bend radius for my application?

A: The minimum bend radius is listed in the technical data sheet for each hose size. Operating a hose below its specified minimum bend radius causes the inner tube to kink, restricting fluid flow and accelerating wear at the fitting interface.

Q: What fluid types are compatible with standard NBR inner tubes?

A: Standard nitrile (NBR) inner tubes are compatible with petroleum-based hydraulic oils, mineral oils, water-glycol fluids, and lubricating oils within an operating temperature range of -40°C to +100°C. For synthetic ester fluids, specialized compounds must be requested.

Q: What is the standard packaging format for bulk hydraulic hoses?

A: Bulk hoses are typically coiled in standard lengths of 50 meters or 100 meters, wrapped with woven polyethylene film, and labeled with product specifications and batch numbers for full traceability. Wooden reels or crates are available for large orders.

Q: Can you supply hydraulic hoses with MSHA fire-resistant outer covers?

A: Yes. Outer covers meeting MSHA (Mine Safety and Health Administration) flame-resistance requirements can be provided upon request for underground mining and hazardous environments.

Q: What documents are included with each shipment?

A: Each order includes factory inspection reports, pressure test certificates, raw material batch test records, and certificates of conformity verifying compliance with SAE, EN, or ISO manufacturing standards.

We are one of the most experienced hydraulic hose manufacturers and suppliers in China, specialized in providing high quality customized products. Please feel free to wholesale bulk durable hydraulic hose in stock here from our factory. Contact us for quotation.

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