EN856 vs EN857: Which Hydraulic Hose Standard Reigns Supreme?

Understanding Hydraulic Hose Standards

Hydraulic hoses play a crucial role in fluid power systems, ensuring effective transfer of fluids under high pressure. Among various standards, EN856 and EN857 are commonly referenced. Each standard offers unique specifications, making it essential to understand their differences for optimal application.

What is EN856?

EN856 is a European standard that specifies the construction and testing of high-pressure hydraulic hoses. It generally covers hoses designed for medium to high pressure. Typically constructed from rubber, these hoses feature a wire-braided or spiraled reinforcement to withstand extreme pressures.

Key Features of EN856

• Pressure Rating: EN856 hoses generally support a maximum pressure ranging from 280 to 420 bar.
• Temperature Range: They can operate in temperatures from -40°C to +100°C, with occasional peaks up to 125°C.
• Applications: Commonly used in construction, agriculture, and other heavy-duty machinery.

What is EN857?

EN857, on the other hand, refers to a standard focused on compact hydraulic hoses, often designated as two-wire or four-wire braids. These hoses are designed for applications requiring a smaller bending radius and are generally considered more flexible than those following EN856 standards.

Key Features of EN857

• Pressure Rating: EN857 hoses usually have a maximum operating pressure of 250 to 400 bar.
• Temperature Range: They can withstand temperatures similar to EN856, ranging from -40°C to +100°C.
• Applications: Ideal for tight spaces and setups where flexibility is crucial, such as in mobile machinery.

Comparative Analysis

When weighing the options between these two standards, several factors must be considered. The choice often depends on the specific application requirements, including pressure, temperature, and flexibility.

Pressure and Flexibility

EN856 hoses tend to handle higher pressures, making them suitable for more demanding hydraulic systems. However, EN857 excels in flexibility, allowing for easier routing in confined spaces. For applications needing both strength and maneuverability, EN857 might be the preferred option.

Durability and Construction

The construction differences also impact durability. EN856 hoses are designed with robust materials suitable for harsh environments, making them less prone to wear. Conversely, EN857 hoses, although flexible, may not offer the same level of durability under extreme conditions.

Choosing the Right Standard for Your Needs

When deciding between the two standards, consider the following points:

• Application Requirements: Analyze the working environment and tasks. High-pressure applications might require the sturdiness of EN856.
• Space Constraints: If flexibility and compactness are imperative, EN857 may be the superior choice.
• Cost Considerations: EN856 hoses can sometimes be more expensive due to their construction, so budget is also a factor.

Conclusion

Both EN856 and EN857 standards have their own advantages and appropriate use cases. A thorough assessment of operational needs will help determine the most suitable hydraulic hose. Making an informed choice will ultimately lead to improved performance and safety in hydraulic systems.

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