Hydraulic Hose Types and Hydraulic Hose Selection Guide
Hydraulic Hose Types and Hydraulic Hose Selection Guide
Hydraulic Hose Types and Hydraulic Hose Selection Guide
What Is a Hydraulic Hose?
Hydraulic hoses are flexible fluid transfer components designed to safely transport pressurized hydraulic fluid between pumps, valves, cylinders, hydraulic motors, and other hydraulic system components. They play a critical role in maintaining system efficiency, reliability, and operational safety.
Selecting the wrong hydraulic hose can result in:
- Pressure loss
- Unexpected hose failure
- Hydraulic oil leakage
- Costly production downtime
- Increased maintenance costs
- Serious workplace safety risks
Choosing the correct hydraulic hose requires evaluating much more than hose diameter or length. Operating pressure, pressure spikes, fluid compatibility, operating temperature, bend radius, environmental conditions, and compliance with international standards should all be considered.
Hydraulic Hose Construction
A hydraulic hose consists of three primary layers.
Inner Tube
The inner tube comes into direct contact with the hydraulic fluid.
Its primary functions include:
- Oil resistance
- Chemical compatibility
- Low friction flow
- Long-term durability
Reinforcement Layer
The reinforcement layer consists of high-tensile steel wire braids or spiral wire reinforcement.
This layer determines the hose's:
- Working pressure
- Pressure impulse resistance
- Burst strength
- Service life
Outer Cover
The outer cover protects the hose against harsh environmental conditions including:
- UV exposure
- Abrasion
- Ozone
- Chemicals
- Weather conditions
- Mechanical impacts
Hydraulic Hose Types
EN853 1SN Hydraulic Hose
The EN853 1SN hydraulic hose features a single steel wire braid and is commonly used in medium-pressure hydraulic systems.
Typical Applications
- Agricultural machinery
- Compact hydraulic power units
- Industrial equipment
- General hydraulic systems
Construction
- Single wire braid reinforcement
EN853 2SN Hydraulic Hose
The EN853 2SN hose is one of the most widely used hydraulic hoses across Europe due to its excellent balance between flexibility and pressure capability.
Typical Applications
- Construction equipment
- Mobile hydraulics
- Industrial machinery
- Hydraulic presses
- Material handling equipment
Construction
- Double steel wire braid
EN856 4SP Hydraulic Hose
The EN856 4SP hose contains four spiral steel wire layers designed for demanding high-pressure applications.
Typical Applications
- Mining equipment
- Rock breakers
- Steel plants
- Heavy industrial machinery
- Mobile hydraulic equipment
Construction
- Four spiral wire reinforcement
EN856 4SH Hydraulic Hose
The EN856 4SH hose is engineered for extremely demanding operating conditions where continuous high pressure and severe duty cycles are required.
Typical Applications
- Offshore equipment
- Port machinery
- Tunnel boring machines
- Large excavators
- Heavy mining equipment
Construction
- Heavy-duty multi-spiral reinforcement
SAE and EN Hydraulic Hose Standards
|
Standard |
Description |
|
SAE 100 R1 |
Single wire braid |
|
SAE 100 R2 |
Double wire braid |
|
SAE 100 R12 |
Spiral reinforcement |
|
EN853 1SN |
European single braid standard |
|
EN853 2SN |
European double braid standard |
|
EN856 4SP |
Four spiral reinforcement |
|
EN856 4SH |
Heavy-duty spiral reinforcement |
Hydraulic hoses manufactured according to SAE and EN standards undergo rigorous testing for:
- Working pressure
- Burst pressure
- Impulse performance
- Dimensional tolerances
- Material quality
10 Critical Factors When Choosing a Hydraulic Hose
Selecting the right hydraulic hose requires evaluating the following:
- Working pressure
- Pressure spikes
- Burst pressure
- Flow rate
- Internal diameter
- Operating temperature
- Hydraulic fluid compatibility
- Environmental conditions
- Minimum bend radius
- Fitting and connection type
How to Choose the Correct Hydraulic Hose Size
Selecting an incorrect hose diameter can lead to:
- Excessive heat generation
- Pressure losses
- Increased noise
- Reduced system efficiency
- Premature component wear
Proper hose sizing should always be based on hydraulic flow velocity calculations rather than fitting size alone.
Common Hydraulic Hose Failures
The most common hydraulic hose failures include:
- Hose burst
- Cover abrasion
- Wire reinforcement fatigue
- Age-related deterioration
- Loose hydraulic fittings
- Incorrect hose crimping
- Bend radius violations
- Excessive pressure surges
Preventive maintenance significantly reduces unexpected failures and costly downtime.
Hydraulic Hose Service Life
A high-quality hydraulic hose that is correctly selected, professionally assembled, and regularly inspected can typically provide 5 to 10 years of service.
However, hose life depends on several factors, including:
- High operating temperatures
- UV exposure
- Continuous vibration
- Pressure spikes
- Abrasive environments
- Chemical exposure
Routine inspections and scheduled replacement programs are strongly recommended.
Why Choose Hidroman?
At Hidroman, we provide far more than hydraulic hoses.
We engineer complete hydraulic hose solutions for:
- OEM manufacturers
- Mining operations
- Steel plants
- Cement factories
- Heavy industries
- Construction machinery manufacturers
- Mobile hydraulic equipment
Our Services
- Custom OEM hydraulic hose assemblies
- On-site hose installation
- Professional hydraulic hose crimping
- Custom hydraulic fittings
- High-pressure testing
- Hydraulic engineering support
- European-standard hydraulic hose assemblies
Our engineering team ensures every hydraulic hose assembly is designed to maximize safety, reliability, and system performance.
Frequently Asked Questions (FAQ)
- How much pressure can a hydraulic hose withstand?
Working pressure depends on hose construction, reinforcement type, diameter, and applicable standards. Standard hydraulic hoses generally operate between 80 and 420 bar, while spiral reinforced hoses are designed for significantly higher pressure applications. Pressure spikes should always be considered during hose selection.
- What is the difference between 1SN and 2SN hydraulic hoses?
The primary difference is the reinforcement layer.
1SN
- Single steel wire braid
- Medium-pressure applications
- Greater flexibility
2SN
- Double steel wire braid
- Higher pressure capacity
- Longer service life
- Preferred for construction and industrial equipment
- When should 4SP or 4SH hoses be used?
4SP
Recommended for:
- Hydraulic presses
- Mining equipment
- Construction machinery
- Mobile hydraulics
4SH
Recommended for:
- Rock breakers
- Steel mills
- Port equipment
- Tunnel boring machines
- Continuous heavy-duty applications
4SH hoses generally provide greater durability under severe operating conditions.
- Why do hydraulic hoses fail?
Common causes include:
- Incorrect pressure rating
- Pressure spikes
- Excessive bending
- Poor crimp quality
- Cover damage
- High operating temperatures
- Chemical incompatibility
- Ageing
Correct hose selection and preventive maintenance dramatically reduce failures.
- How can hydraulic hose life be extended?
Best practices include:
- Selecting the correct pressure class
- Respecting minimum bend radius
- Protecting against abrasion
- Performing regular inspections
- Maintaining proper oil temperature
- Using quality fittings
- Professional hose crimping
- Why is minimum bend radius important?
Every hydraulic hose has a specified minimum bend radius.
Exceeding this limit may cause:
- Inner tube collapse
- Reinforcement damage
- Restricted flow
- Pressure loss
- Premature hose failure
- What is the difference between SAE and EN standards?
SAE standards originate in North America, while EN standards are widely adopted across Europe.
Both specify requirements for:
- Working pressure
- Burst pressure
- Dimensional tolerances
- Testing methods
- Performance requirements
Many premium hydraulic hoses comply with both standards.
- Which hydraulic fluids require special hoses?
Standard NBR inner tubes are suitable for mineral-based hydraulic oils.
Special hose materials are recommended for:
- Biodegradable hydraulic fluids
- Phosphate ester fluids
- Synthetic hydraulic oils
- Water-glycol fluids
- Chemically aggressive fluids
Choosing the wrong hose material may result in swelling, cracking, or premature failure.
- What is an OEM hydraulic hose?
OEM hydraulic hoses are manufactured according to specific machine requirements.
They typically include:
- Custom fittings
- Precise length tolerances
- Strict quality control
- Machine-specific testing
- Full manufacturer compliance
Standard hydraulic hoses are intended for more general industrial applications.
- What are the most common hydraulic hose installation mistakes?
Installation errors frequently include:
- Twisting the hose
- Incorrect fitting selection
- Improper crimping
- Exceeding bend radius
- Poor abrasion protection
- Incorrect hose length
- Improper clamping
- Skipping pressure testing
Professional assembly and pressure testing are essential for safe and reliable hydraulic system operation.