Manufacturing Hydraulic Hoses

If you want to learn more, please visit our website SANYEFLEX.

The hydraulic hose manufacturing process is a combination of the processes used to manufacture the constituent parts. The constituent parts of the hydraulic hose include the outer cover, the textile or metal reinforcement, and the inner tube. The outer cover is designed to provide robust service and protection from elements of climate and operating conditions.

Sun, wind, heat, cold, humidity, and wind all are climatic elements that can prematurely erode a hydraulic hose cover. Abrasion and vibration are the primary operating elements that can also erode and decay hydraulic hose covers. With the cover eroded, the inner reinforcement is revealed to the elements which can be very dangerous as hydraulic hose operates under very high pressure and any leak can be harmful even fatal to operators working around these hydraulic hoses.


The outer cover between hydraulic hose manufacturers can vary significantly which is important when it comes time to choose hose end fittings to build assemblies Reinforcement of hydraulic hose can come from either textile or steel. Textile reinforced hydraulic hoses are rated for lower pressures than steel reinforced hoses. Textile hoses are more flexible and cost less than steel hoses as their manufacturing process is much simpler than handling steel. The raw cost of materials is also lower for textile hoses.


Steel reinforced hydraulic hoses can handle much higher pressures than textile hoses. Steel hydraulic hoses can be either built by braiding or spiraling steel over an inner cover. Braiding utilizes braiding machines that continuously lay steel braids over one another to form long lengths of hose. Spiraling steel is more difficult than braiding and is used to form the highest pressure hydraulic hoses. Steel spirals are also more rigid than braided steel and also more expensive.


Finally, steel spiraling produces shorter lengths of hydraulic hoses. The inner tube of hydraulic hoses is generally a rubber tube that is of fixed diameter (unlike the outer diameter which can vary from manufacturer to manufacturer). The inner tube must be compatible with the type of fluid that moves through the hydraulic hose. The inner tube is made of treated rubber and is generally extruded in a single large length. Most hydraulic hose manufacturing lines exist outside of North America and have moved to low cost manufacturing countries. There are still some manufacturing plants in the United States which serve mostly military customers as the government typically purchases hydraulic hoses from domestic strategic suppliers.


Most of the independent hydraulic hose manufacturers have moved overseas so these manufacturing plants are typically for the larger public companies. Types pf Hydraulic hose types can be broken down by their reinforcement. The breakdown is as follows: Textile &#; R4, R3 Braided Steel: 1SN (1 wire braid), 2SN (2 wire braid) Spiral Steel: R12 (4 spiral), 4SH (6 spiral) Other than reinforcement, the hose can have different hose covers for climate and operating conditions. Therefore these hoses will have reinforcement classifications and outer cover classifications.


For rare cases, the inner tube may also dictate classifications as the inner tube needs to handle different types of fluids. -Crimping When crimping hose ends onto the hydraulic hose, most manufacturers recommend matching their hose ends to their hose. However, if the hose outer diameter is the same, different brands of hose ends will work for the hydraulic hose of a similar diameter. Generally, with most hydraulic hose crimpers, the hose is capped with a hose end then placed into a crimper.


The crimper crimps down on the hose end which then latches onto the hydraulic hose. In the case of &#;bite-to-the-wire&#; hose ends, the hose ends actually bites through the rubber outer cover and into the hydraulic hose metal reinforcement. There are a few crimper manufacturers in the US however Custom Crimp is the largest. Other manufacturers exist in Europe as well as in Asia.

Inner Tube

Material: Nitrile rubber is predominantly used for the inner tube of hydraulic hoses.

Properties: This material is highly valued for its resistance to oils, making it ideal for transporting hydraulic fluid. It ensures that the hose can handle the fluid without the risk of degradation over time.

Function: Serving as the fluid conduit, the inner tube&#;s compatibility with hydraulic fluid is crucial for the hose&#;s overall performance and longevity.

Outer Cover

Material: The outer cover of hydraulic hoses is often made from synthetic rubber.

Want more information on china hydraulic hose factory? Feel free to contact us.

Properties: Synthetic rubber is chosen for its robustness against environmental challenges, including adverse weather conditions, exposure to UV radiation, and resistance to physical abrasions.

Role: This layer plays a critical role in maintaining the hose&#;s structural integrity, protecting it from external damage that could compromise its function.

Steel Wire Reinforcement

Material: The reinforcement layer is constructed from high-strength steel wire, integral to the hose&#;s design to ensure it can withstand internal pressures.

Design Options:

Braided: Offers more flexibility and is typically employed in hoses designed for lower-pressure applications.

Spiraled: Provides greater strength and is used in high-pressure hoses where rigidity is required to maintain the hose&#;s shape and function under pressure.

Selection Criteria: The choice between braided and spiraled reinforcements is dictated by the hose&#;s intended pressure rating and the need for flexibility. This decision is crucial for aligning the hose&#;s capabilities with its specific application requirements, ensuring optimal performance and durability.

For more information, please visit china flame resistant hydraulic hose.