Hydraulic Tubing vs. Hydraulic Hose: What You Need to Know

What are Hydraulic Tubes?

Hydraulic tubes are pipes or tubes specifically designed for use in hydraulic systems, which are systems that transmit power through the use of pressurized liquids, typically oil. These tubes are used to carry hydraulic fluid between various components, such as pumps, cylinders, and valves, in machinery and equipment.

What Are the Most Common Materials for Hydraulic Tubes?

The material composition of hydraulic tubes plays a significant role in their performance and suitability for different applications. The most common materials used are:

Steel: Carbon steel is widely used in hydraulic systems due to its strength, affordability, and ability to withstand high pressures. It is often coated with zinc or other protective layers to resist corrosion. However, carbon steel is susceptible to rust in humid or corrosive environments, making it less suitable for certain applications without additional coatings or treatments.
Stainless Steel: Stainless steel offers superior corrosion resistance, making it ideal for applications in harsh environments, such as marine, chemical, and food processing industries. It is highly durable, resists oxidation, and can handle extreme temperatures. Although more expensive than carbon steel, stainless steel is preferred in situations where longevity and resistance to corrosion outweigh cost considerations.
Chrome: Chrome-plated steel tubes combine the strength of carbon steel with an added layer of chrome for improved corrosion and wear resistance. The chrome coating enhances the tube’s durability, reduces friction, and extends the lifespan of hydraulic components.

What Is the Difference Between Hydraulic Tubing and Hydraulic Hose?

Hydraulic tubes are inflexible and engineered to endure high pressures, whereas hydraulic hoses are designed for flexibility and mobility. Typically, hoses are employed in applications with lower pressure demands compared to tubes. Metric tubing is generally more precise and standardized, particularly for European and international applications, offering better compatibility in global systems.

Types of Hydraulic Tubes

Seamless Hydraulic Tubes: These tubes are produced without seams, enhancing their strength and reliability for high-pressure applications. They are commonly chosen for critical situations where tube failure could result in significant downtime or safety risks.
Welded Hydraulic Tubes: Welded tubes are created by rolling a flat metal sheet into a tube shape and welding the seam. Although they are more cost-effective than seamless tubes, they are not as strong. However, they are a suitable choice for lower-pressure applications where affordability is a priority.

How Do You Size A Hydraulic Tube?

Hydraulic tubes are sized based on the internal diameter (ID) and the wall thickness. The size should be chosen to match the flow rate and pressure requirements of the hydraulic system.

Outer Diameter (OD): The outer diameter depends on the tube’s material, pressure ratings, and wall thickness. It is important to ensure the tube can handle the required pressure.
Inner Diameter (ID): The inner diameter of the tube must be large enough to handle the required flow rate while maintaining appropriate fluid velocity. A higher flow rate typically requires a larger diameter.
Wall Thickness: The tube's wall thickness should be sufficient to handle the pressure without risk of bursting. For high-pressure applications, thicker walls are typically necessary.

How to Select the Right Hydraulic Tube?

Factors to Consider

Material Matching: Choose a material that matches the system's pressure, temperature, and environmental conditions. For instance, stainless steel tubes are perfect for corrosive environments, whereas carbon steel tubes are better suited for standard applications. Understanding the operating conditions and fluid characteristics is essential in choosing the right material.
Pressure Rating: Determine the maximum operating pressure the hydraulic system will experience. The tube must be able to withstand this pressure without failure. This prevents potential failures and ensures the tube can handle the pressures encountered during operation.
Flow Rate: Calculate the fluid flow rate in gallons per minute (GPM) or litres per minute (LPM) based on the system’s requirements.

What Is the Difference Between Metric and Imperial Hydraulic Tubing?

Metric hydraulic tubing uses millimetres for measurements, while Imperial tubing uses inches. The choice depends on the region and system requirements.

What Are The Common Uses Of Hydraulic Tubes?

Hydraulic tubes are used in various industries and applications where fluid power is needed to transmit energy through pressurized fluids. Here are some of the most common uses of hydraulic tubes:

1. Construction Equipment

Excavators, Loaders, Cranes: Hydraulic tubes are essential in construction machinery to carry the hydraulic fluid that powers equipment like booms, lifts, and bucket movements. The tubes help transmit high-pressure fluid to hydraulic cylinders, which perform lifting and digging tasks.

2. Agricultural Machinery

Tractors, Combine Harvesters, and Plowers: Hydraulic systems are commonly used in agricultural machinery to operate various implements like lift arms, steering systems, and harvesting equipment. Hydraulic tubes help transfer fluid to these systems to control the operation.

3. Aerospace

Aircraft and Spacecraft: In the aerospace industry, hydraulic tubes are used in flight control systems, landing gear systems, and other critical functions in aircraft and spacecraft. These systems require precise, high-pressure fluid transfer, and the hydraulic tubes ensure that the fluid moves smoothly and efficiently.

4. Automotive Industry

Braking Systems and Power Steering: Hydraulic tubes are used in the automotive sector, especially in braking systems (e.g., disc brakes) and power steering systems. They help transmit the fluid needed to apply pressure to brake components or assist steering mechanisms.

5. Oil and Gas Industry

Drilling and Offshore Platforms: In the oil and gas industry, hydraulic systems are used in drilling rigs, offshore platforms, and other heavy equipment. Hydraulic tubes help carry fluid for various functions, such as controlling valves, pumps, and other critical operations in harsh environments.

6. Forestry Equipment

Log Splitters and Harvesters: Hydraulic tubes are commonly used in forestry machinery to power equipment like log splitters and harvesters. These tubes help transfer hydraulic fluid that powers the cutting and lifting operations.

What Is the Maximum Pressure a Hydraulic Tube Can Handle?

The maximum pressure a hydraulic tube can handle depends on the material, diameter, and wall thickness. Steel tubes can handle very high pressures, while hoses may have lower pressure limits.

How Do I Install Hydraulic Tubing?

Hydraulic tubing should be cut to the proper length, bent to the required angle, and connected using appropriate fittings. Proper installation is crucial for ensuring leak-free performance and safety.

Can Hydraulic Tubes Be Repaired?

In some cases, hydraulic tubes can be repaired using specialized techniques, such as welding or patching. However, if they are severely damaged or corroded, replacement is usually recommended to ensure system safety and performance.

Why Buy Hydraulic Tubing from Flowfit?

Premium Quality: Flowfit’s hydraulic tubing are made from top-grade materials, ensuring long-lasting durability and exceptional performance in even the most demanding applications.
Comprehensive Range: We offer a wide selection of materials and sizes to suit your specification.
Customisable Solutions: Flowfit provides tailored power units that meet the unique specifications of your equipment and industry.
Free UK Shipping: We offer free UK shipping on orders over £250, making it easier and more affordable to get the hydraulic components you need delivered straight to your door.
Global Shipping: Flowfit proudly serves customers across the UK and worldwide, ensuring that top-quality hydraulic products are available no matter where you are.

Browse our selection of hydraulic tubing and find the ideal hydraulic solution for your needs. Our team of hydraulic specialists are ready to assist you with expert advice and help you find the best products for your equipment.

For more information, get in touch with our team of hydraulic specialists today!