what size hydraulic hoses failure


Hydraulic systems are highly efficient and commonly used in various industries, from construction to agriculture. One crucial component of these systems is the hydraulic hose, which plays a vital role in transferring fluid between different hydraulic components. The size of hydraulic hoses is a critical factor that directly impacts the overall performance and efficiency of the system. In this article, we will explore the significance of hydraulic hose size and the potential failures associated with incorrect sizing.

1. Importance of Correct Hose Size

2. The Consequences of Undersized Hoses

3. The Consequences of Oversized Hoses

4. Factors to Consider in Choosing the Right Hose Size

5. Best Practices for Hydraulic Hose Sizing

Importance of Correct Hose Size

In hydraulic systems, choosing the correct hose size is crucial for ensuring optimal performance and preventing potential failures. The size of the hydraulic hose affects the flow velocity, pressure drop, heat generation, and overall efficiency of the system. It is essential to select the appropriate hose size that can handle the maximum flow rate required by the specific application.

The Consequences of Undersized Hoses

Using hoses that are smaller than required can lead to severe issues within the hydraulic system. The flow velocity increases significantly in undersized hoses, resulting in a higher pressure drop. This increased pressure drop hampers the efficiency of the system, leading to decreased performance and potential overheating of hydraulic components.

Undersized hoses are prone to premature failure due to excessive internal pressure generated by the restricted flow area. The constant high pressure can cause the hose to burst, resulting in fluid leaks, system downtime, and potential damage to other components. Additionally, undersized hoses experience elevated turbulence, which can lead to increased noise and vibration, affecting the overall system's stability.

The Consequences of Oversized Hoses

While undersized hoses are problematic, oversized hoses also pose potential risks and failures within hydraulic systems. The flow velocity in oversized hoses decreases, leading to insufficient pressure to operate hydraulic components effectively. This reduced velocity can cause hydraulic cylinders to operate sluggishly or fail to function altogether.

Oversized hoses tend to trap air and heat within the system, resulting in decreased efficiency and potential damage to hydraulic components. Additionally, excessive heat generated by oversized hoses can lead to reduced oil life, increased wear, and degraded performance of the hydraulic system.

Factors to Consider in Choosing the Right Hose Size

When selecting the appropriate hydraulic hose size, several factors need to be considered:

1. Flow rate: Determine the maximum flow rate required by the system to ensure optimal performance.

2. Pressure rating: Choose a hose with the necessary pressure rating to handle the operating pressure within the system.

3. Velocity limits: Consider the acceptable flow velocity range to prevent issues associated with either excessive or insufficient velocity.

4. Fluid compatibility: Ensure that the selected hydraulic hose is compatible with the fluid used within the system to avoid degradation or failure.

5. Environmental conditions: Assess the operating temperature and environmental conditions to select a hose that can withstand the specific environment's challenges.

Best Practices for Hydraulic Hose Sizing

To avoid failures and optimize hydraulic system performance, adhere to the following best practices when sizing hydraulic hoses:

1. Consult manufacturer guidelines and seek expert advice to determine the appropriate hose size for your specific application.

2. Consider potential system expansion or future modifications when selecting hose sizes to accommodate any changes.

3. Regularly inspect hoses for signs of wear, bulging, or leaks to prevent potential failures and system downtime.

4. Maintain proper fluid cleanliness and regularly replace filters to prevent contamination-related hose failures.

5. Use accurate and calibrated flow and pressure measuring instruments to ensure accurate sizing and performance evaluation.


The size of hydraulic hoses significantly impacts the overall performance, efficiency, and reliability of hydraulic systems. Ensuring appropriate hose sizing is crucial to prevent potential failures associated with undersized or oversized hoses. By considering the relevant factors and following best practices, operators can select the right hose size, optimize system performance, and minimize downtime and repair costs.


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