Choosing the Best Tube Assembly for Hydraulic Systems

Hydraulic systems are found in a wide range of industries, powering machinery and equipment through the precise control of fluid movement. Whether used in aircraft hydraulic systems or industrial machinery, the choice of tube assembly can significantly influence both performance and durability. In this blog, we will discuss some considerations for selecting the best tube assembly for hydraulic systems, examining how different factors contribute to optimizing fluid transmission and ensuring system efficiency.

What Are Tube Assemblies in Hydraulic Systems?

Tube assemblies provide a physical pathway for hydraulic fluid to move between components like pumps, valves, and actuators. These assemblies consist of tubes or hoses that connect different parts of a hydraulic system, serving to transport fluid while withstanding the high pressures, vibrations, and temperatures commonly encountered during operation. As such, selecting the right tube assembly is essential for maintaining efficiency, preventing leaks, and minimizing downtime in operations.

What Factors Should Be Considered When Selecting Tube Assemblies?

There are several factors that should be carefully evaluated when deciding which tube assembly to incorporate into a system. To ensure optimal performance and compatibility with the specific application at hand, the most important considerations are the materials and fittings used.

Materials

When selecting the material for a tube assembly, it is necessary to confirm that it can withstand the intended operating pressure, fluid used, and environmental conditions. The chosen material must be able to hold up to the absolute maximum pressure of the hydraulic system, and it should be compatible with the fluid used to prevent chemical reactions or degradation over time. Additionally, in cold environments, certain materials may become brittle and be at a higher risk of cracks or fractures, while in high-temperature environments, materials must resist expansion or warping.

Various materials are utilized for the construction of hydraulic tubes, the most common including rigid materials like stainless steel, carbon steel, and aluminum. Stainless steel is favored for its corrosion resistance, especially in harsh environments where exposure to moisture, chemicals, or salt is likely. Carbon steel is another popular choice for its strength and ability to handle high-pressure fluids, though it may require additional coatings to prevent corrosion over time. Finally, aluminum is less suitable for high-pressure applications but may be used in systems where reducing weight is a must, such as in certain aircraft systems. It is also worth noting that more flexible materials may also be present in some hydraulic systems, depending on specific demands for flexibility and movement.

If the system operates in harsh environments, whether that be in extreme temperatures or in the presence of corrosive elements, it may also be necessary to apply special coatings to the tube assembly to enhance its durability. Coatings like zinc or nickel plating can provide additional protection against corrosion, extending the lifespan of the tube and reducing the frequency of maintenance or replacements. In environments where the assembly is subjected to high wear or abrasion, polymer-based coatings may be considered to add an extra layer of defense.

Fittings

Fittings are another crucial aspect of hydraulic tube assemblies, as they connect the tubes to other system components and ensure fluid integrity throughout. These fittings must be compatible with all materials used in the components they touch, as well as the hydraulic fluid itself to avoid leaks or premature wear. The most common fittings found in hydraulic tube assemblies include flare fittings, compression fittings, and threaded fittings. Flare fittings create a leak-free connection by flaring the tube end, creating a tight seal when paired with a corresponding fitting. Compression fittings use a ferrule that compresses against a tube as they are tightened for a strong and reliable seal. Lastly, threaded fittings are widely used in hydraulic systems because they allow for quick and easy connections that can handle high pressures.

It is also important to note that the presence of vibration can significantly impact tube assemblies, especially in settings like aircraft, where constant motion and turbulence are expected and can weaken connections over time. In such cases, vibration-damping measures like specially designed fittings may be required to ensure long-term reliability.

Where Can I Buy All the Parts I Need for a Hydraulic System?

For all the tube assemblies, fittings, and other hydraulic components you need, you can always rely on Aero World 360 to secure the most competitive pricing and rapid lead times on products from leading manufacturers. We encourage you to browse our website at your leisure, and if anything grabs your attention, you can always utilize our online quote request forms. Our experts take all of the information provided on a form into account to tailor ideal quotes, and customers can expect to get a response in 15 minutes or less. To learn more about our commitments and services, get in touch with our representatives by form, phone, or email at any time.