4SP Hydraulic Hose - DIN EN856 / DIN20023 Certified Steel Wire Spiral High Pressure Hose

Hose Construction
Inner tube: oil resistant synthetic rubber
Reinforcement: four high tensile steel wire spiral
Cover: oil, abrasion, weather resistant synthetic rubber
Working Temp.: -40℃ up to +121℃

Model:
DIN EN856 / DIN20023 4SP

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Description

FAQ

Designed for industrial business purchasers and heavy equipment operators requiring uncompromising performance in extreme hydraulic environments, our DIN EN856 4SP hydraulic hose is fully certified to DIN EN856 and DIN20023 standards, delivering industry-leading reliability for very high pressure hydraulic systems. Engineered with a precision four-layer spiral reinforcement structure, this 4SP steel wire spiral hydraulic hose is built to withstand the most severe impulse cycles and pressure spikes common in heavy-duty hydraulic operations. The hose features an oil-resistant synthetic rubber inner tube, four high-tensile steel wire spiral reinforcement layers, and a rugged synthetic rubber cover with exceptional resistance to oil, abrasion, and weathering. With a wide operating temperature range from -40℃ up to +121℃, this DIN20023 certified high pressure hose maintains consistent performance in harsh indoor and outdoor conditions, making it the go-to solution for mission-critical hydraulic applications.

Fiber weaving	Steel wire winding	Wire braiding machine
Friction testing machine	High-speed joint venture	Storehouse

Core Features & Technical Advantages

Ultra-Robust Spiral Reinforcement Construction

At the heart of this four layer high tensile steel wire spiral hydraulic hose is its industry-defining reinforcement structure. Unlike braided hose alternatives, the four spiral-wound high-tensile steel wire layers deliver superior volumetric expansion control, exceptional impulse fatigue resistance, and far higher pressure capacity. This design ensures the hose maintains structural integrity even under repeated cyclic loading, drastically reducing the risk of premature failure and extending service life in high-stress environments.

Industry-Leading Pressure Ratings with Unmatched Safety Margins

Our high pressure spiral hydraulic hose is optimized for extreme hydraulic demands, with working pressures reaching up to 445 bar (6453 psi) for smaller diameters, and maintaining stable high performance across all size variants. We adhere to a strict 4:1 safety ratio between burst pressure and working pressure, with proof pressure set at twice the working pressure. These generous safety margins ensure the hose reliably withstands unexpected pressure spikes and intense hydraulic impulses, minimizing downtime and safety risks for your operations.

Harsh Environment-Ready Material Performance

Every component of the DIN EN856 4SP hydraulic hose is engineered for durability in tough conditions. The inner tube uses premium oil-resistant synthetic rubber, fully compatible with petroleum-based hydraulic fluids, while the outer cover delivers exceptional resistance to abrasion, oil, and weathering, protecting the reinforcement layers from physical damage and environmental degradation. This robust material pairing ensures long-lasting performance even in dusty mining sites, outdoor construction yards, and heavy industrial settings.

Applications & Industry Use Cases

This heavy duty hydraulic hose for mining and high-pressure operations is purpose-built for applications where standard hoses cannot deliver the required performance.

Heavy Duty Mobile Earthmoving Equipment

It is the ideal solution for large construction machinery including excavators, bulldozers, wheel loaders, and articulated haulers, where high-pressure hydraulic circuits are subject to constant movement and impulse loading.

Mining & Extraction Operations

Our 4SP steel wire spiral hydraulic hose is widely used in underground and surface mining equipment, where extreme pressure, frequent impulse cycles, and abrasive conditions demand uncompromising reliability.

Large-Scale Industrial Hydraulic Systems

It is also perfectly suited for stationary high-pressure hydraulic systems, including heavy industrial presses, offshore hydraulic equipment, and large-scale material handling systems using petroleum-based hydraulic fluids.

Detailed Technical Specifications

Inside Diameter		Reinforcement Diameter	Outside Diameter	Working Pressure		Proof Pressure	Burst Pressure	Min. Bend Radius	Weight
inch	mm	mm	mm	psi	bar	bar	bar	mm	kg/m
3/8	9.3-10.1	17.4-18.2	21.2-22.0	6453	445	1070	1780	180	0.75
1/2	12.3-13.5	20.3-21.1	24.2-25.0	6018	415	1020	1660	230	0.89
5/8	15.5-16.7	23.8-24.6	27.7-28.5	5075	350	840	1400	250	1.1
3/4	18.6-19.8	28.3-29.1	32.2-33.0	5075	350	840	1400	300	1.5
1	25.0-26.4	35.4-36.2	39.2-40.0	4060	280	765	1120	340	2.02
1-1/4	31.4-33.0	45.1-45.9	50.2-51.0	3045	210	500	840	460	3.05
1-1/2	37.7-39.3	51.6-52.4	56.7-57.5	2683	185	445	740	560	3.4
2	50.4-52.0	64.6-65.4	70.7-71.5	2393	165	400	660	660	4.35

FAQ

Q1:What advantages does the four-spiral steel wire reinforcement provide in the DIN EN856 4SP hose?

A1:

The hose incorporates four layers of high-tensile steel wire wound in a spiral pattern, delivering outstanding resistance to high pressure and severe impulse cycles. This robust spiral construction, combined with an oil-resistant synthetic rubber inner tube and abrasion/weather-resistant cover, makes it highly suitable for very high-pressure hydraulic applications in heavy-duty equipment like mining machinery, earth-moving vehicles, and large construction systems using petroleum-based fluids.

Q2:How do the pressure ratings and safety factors support extreme hydraulic demands?

A2:

Working pressure (WP) is optimized for ultra-high performance: typically 445 bar / 6450 PSI in smaller sizes (e.g., 3/8"–1/2"), decreasing to around 215 bar / 3118 PSI in larger sizes (e.g., 2"). Burst pressure maintains a strict 4:1 safety ratio (e.g., up to 1780 bar burst in smaller diameters), and proof pressure is 2× WP. These high safety margins ensure the hose withstands intense pressure spikes and repeated impulses common in demanding applications such as heavy excavators or mining operations.

Q3:Why is the spiral design preferred over braided hoses for this high-pressure hose?

A3:

The four-spiral steel wire reinforcement offers superior volumetric expansion control, better impulse fatigue resistance, and higher overall pressure capacity than braided constructions. This makes the 4SP hose especially effective for dynamic, high-impulse hydraulic circuits in large machinery, where braided hoses may experience faster wear or failure under extreme cyclic loading—resulting in longer service life and greater reliability in petroleum hydraulic systems.

Q4:How does the minimum bend radius and weight impact installation in heavy equipment?

A4:

Minimum bend radius ranges from approximately 150 mm in smaller sizes to 630 mm in larger ones, requiring careful routing to avoid excessive stress on the four-spiral layers. Weight per meter increases with diameter (roughly 1.0–4.5 kg/m), providing structural robustness for high-flow, high-pressure lines while still allowing practical handling during installation in heavy construction or mining equipment. Proper bend compliance helps preserve hose integrity and performance under load.