Hydraulic hoses are indispensable in most industrial works. They are widely used to transfer fluid across a hydraulic system. Choosing a high-pressure hydraulic hose is essential for transferring fluid under extreme pressure. These hoses make your high-pressure hydraulic system more efficient and safe.
If you are going to initiate a high-pressure hydraulic system and you don’t know which items or brands you should choose for your project, then you are in the right place.
This article introduces high-pressure hydraulic hoses, their sizes, applications, and fittings. We hope it will help you choose the correct ones for your project.
What is a High-Pressure Hydraulic Hose?
High-pressure hydraulic hoses are a common type of flexible tube. Their designs are especially suitable for transferring hydraulic fluid under extreme pressure. They are used in construction, mining, aviation, and heavy machinery.
Most modern high-pressure hydraulic hoses come with amazing features. They are more durable and very easy to install. Let’s check some of their standard features.
(1) A good-quality hydraulic pressure hose has well-finished ends. This feature typically allows you to connect the hose with fittings and connectors easily. Therefore, you can perform the assembly and disassembly process more conveniently.
(2) Usually, these hoses have three layers: an inner tube, a reinforcement layer, and an outer layer. The inner tube is crucial because it determines the hose’s compatibility with the conveyed fluid. However, the reinforcement layer may have steel wires, textile braided forms, or others. The type of reinforcement typically depends on the hose’s final specification.
(3) The unique construction of the hydraulic pressure hoses makes them more durable.
(4) Hydraulic pressure hoses follow international standards like ISO, EN, and SAE.
How Are High-Pressure Hydraulic Hoses Made?
As you know, high-pressure hydraulic hoses are widely used in heavy-duty applications. Therefore, these hoses must be high-quality and well-made. Usually, making high-pressure hydraulic hoses takes three steps, just like the three layers.
First, you must select the appropriate materials for the inner tube. Then, you can create it using the extrusion process and other treatments. The type of material depends on the working fluid.
The second step is the most crucial. Since you are making high-pressure hoses, the reinforcement layer typically plays a critical role here. It may vary by one or more layers depending on the working pressure.
The final step is making the outer cover. The outer cover must resist wear, environmental factors, and impact. The material selection is also crucial in this case. Usually, synthetic rubber and thermoplastics are preferred.
Note that the bonding between these is typically done through the vulcanization process. To do this, the production uses a pressurized chamber that heats the hose for bonding.
Characteristics of a high-pressure hydraulic hose
As you know, high-pressure hydraulic hoses are ideal for executing under extreme pressure. These hoses are best suited for demanding conditions. And, of course, it is common in industrial, construction, and automotive applications. Here are some key characteristics:
High-Pressure Resistance and Safety Factor
As the name implies, a hydraulic pressure hose is perfect for high-pressure work. They usually resist from 1000 PSI to 10,000 PSI, and some high-pressure hydraulic hoses may resist even more.
Burst pressure is critical when dealing with high-pressure hoses. Usually, it is four times the working pressure in hydraulic hoses. The safety factor may be two to six times for other types of hoses. This rating typically ensures safety by preventing sudden hose failure.
Compatible and Strong Inner Tube
There are different types of hydraulic oils. Not all oils are compatible with the same kinds of hose materials. Thus, the inner tube material must be compatible with the specific oil or synthetic lubricants.
Reinforcement Layer
This layer typically provides extreme pressure resistance. It protects the hose from abrasion, chemicals, and weather conditions.
Durable Outer Cover
High-pressure hydraulic hoses are widely used in heavy-duty applications. Because of this, they often face friction, sudden impact, wear and tear, and harsh conditions. Therefore, the outer cover prevents these factors and protects the hose.
Flexibility and Bend Radius
The high-pressure hydraulic hoses are very flexible. Therefore, they offer easy routing in compact spaces. Although you can not get as much flexibility as regular hoses because of the reinforcement layer. Thus, the bending radius comes in. Check for the bending radius before you use it.
The Difference Between a High-Pressure Hydraulic Hose And a Low-Pressure Hydraulic Hose
High-pressure and low-pressure hydraulic hoses work different purposes based on their pressure-handling capacities. Here are some differences:
| High-Pressure Hydraulic Hose | Low-Pressure Hydraulic Hose |
| Works under a pressure range of 1,000 to over 10,000 PSI or more | Works under a pressure range of 300 PSI |
| Typically, it has multiple layers, including one or many reinforcement layers. | Typically, it has one or two layers. |
| Used in construction, mining, aviation, and heavy machinery | Used in cooling systems, return lines, fuel lines, air conditioning systems |
| It is less flexible since it is made of multiple reinforcement layers, but it is more durable and highly resistant to heat and pressure. | It is more flexible and easier to handle, but less durable. |
| High-pressure hydraulic hoses are more expensive due to more robust materials and complex construction. | Low-pressure hydraulic hoses are cheaper and easier to manufacture. |
What is A high-pressure hydraulic hose made of?
A high-pressure hydraulic hose is typically made of a combination of various materials. As mentioned, the construction has three layers. The inner tube is synthetic, mainly rubber. The core layer, which is also called the reinforced layer, is primarily metallic. However, some hydraulic hoses may also have textile-reinforced layers.
The outer cover is generally thermoplastic, but some hydraulic pressure hoses may have a rubber outer cover. It depends on your project needs.
Popular High-Pressure Hydraulic Hose Sizes and Their Applications
The high-pressure hydraulic hoses have different sizes according to their demanding conditions. It mainly varies by inner diameter(ID), outer diameter(OD), and working pressure. Some popular types of high-pressure hydraulic hoses with their size range and applications are:
Rubber Hose Hydraulic SAE100 R2/EN 853 2SN
This high-pressure hydraulic hose has an inner diameter of 4.6 mm to 52 mm and an outer diameter of 14.1 mm to 68.6 mm. Consequently, it has a working pressure of 1200 to 6225 PSI. This model is widely popular in agriculture-based machinery such as tractors, self-discharging trucks, and hydraulic equipment.
Hydraulic Rubber Hose SAE100 R7
This model’s ID ranges from 4.8 to 25.4 mm, and its OD from 10.3 to 34 mm. Consequently, its working pressure may vary from 1200 PSI to 6225 PSI. This type of high-pressure hydraulic hose is excellent for pneumatic systems.
Hydraulic Rubber Hose SAE100 R9 SAE100R10 SAE100 R12
This model is ideal for forklifts, hydraulic engines, and oilfield machinery. It is widely used in mines, roads, construction, and machinery. This high-pressure hydraulic hose has an ID from 9.3 mm to 52 mm and an OD from 19.5 mm to 68.3 mm. The working pressure ranges from 2450 PSI to 4060 PSI.
Hydraulic Rubber Hose SAE100 R16
The SAE100 R16 has an ID from 6.2 mm to 33 mm and an OD from 14.5 mm to 44.3 mm. Its working pressure ranges from 1639 PSI to 5075 PSI. This hydraulic hose is suitable for petroleum and water-based hydraulic fluids. It could also convey lubrication oils and oil emulsions.
What is a High Pressure Hydraulic Hose Fitting?
A high-pressure hydraulic hose must have something to connect it to the central system. The equipment or part used in this case is called fittings. Since you are using them for high-pressure hydraulic hoses, thus the name “high-pressure hydraulic hose fittings.” You can use it to connect the hose with pumps, valves, or cylinders.
Like hydraulic pressure hoses, fittings have different types. You can divide them into permanent, reusable, and quick-disconnect hose fittings. They are usually stainless steel. However, you may also find various high-pressure hydraulic hose fittings based on different structures.
(1) Threaded fittings are ideal for high-pressure points.
(2) Flange fittings are suitable for large-diameter hoses.
(3) Compression fittings are excellent for quick connect and disconnect uses.
Expert Advice
You have gone through a detailed explanation of high-pressure hydraulic hoses. We have highlighted some essential information you may need when choosing the right option. However, before you do that, you should follow these experts’ advice.
#1 Project Needs
The first factor in this selection process is assessing your project needs. What kind of project will you initiate? Is it a high-pressure or low-pressure system? What is the exact working pressure? For higher pressure, choose higher-pressure hydraulic hoses. Always ensure a tolerance between the exact working pressure of the hose. Also, you must consider the hose size, including ID and OD.
#2 Type of hydraulic Oil
As you know, high-pressure hydraulics have three layers. The inner tube determines the type of hydraulic oil it can transfer. So, consider the hydraulic oil when you choose a hydraulic hose.
#3 Environmental Needs
The environmental factor also plays a critical role. In this case, you should consider the selection of outer layer material. Evaluate the place of applications. Does it involve chemicals and UV radiation? How about the possibilities of impact forces and frictions? Also, consider the temperature ranges.
#4 Budget
After considering everything, the next thing that comes to mind is the budget. Indeed, high-quality hydraulic pressure hoses generally cost more. However, it doesn’t always work like that. You have to balance the quality of the hose and the price. Try to find out whether the price is appropriate with the quality.
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If you have any questions about hydraulic hoses, contact Rentone Hose Customer Support. We are always ready to help.
