Hydraulic hose guide: selecting the right hose with ...

Understand dash numbers. This is a measuring system specific to hydraulics. The dash indicates the hose I.D. in sixteenths of an inch, though there are exceptions, as noted in the table.

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Here&#;s a look at each of these critical areas of information that you&#;ll need such a hose identification and choices when it comes to stamped hose selection:

** SAE100R5, SAE100R14, SAEJ51 and SAEJ only (hose I.D. is equal to O.D.)

Temperature

Temperature in this context refers to the fluid being used and its environment. You must consider these factors:

• Maximum Intermittent Ambient Temperature

When exposed to extreme hot or cold, hoses with a rubber inner tube and/or cover can have significant change in properties. These conditions may require some hoses to be rated to a lower operating pressure.

• Fluid temperature

This refers to the temperature of the fluid being conveyed inside of the hose during use.

• Ambient temperature

Think about the temperature of the hose assembly&#;s environment.

• Maximum temperature

What is the highest temperature that the fluid or environment might reach, even in short durations? The hose you choose should be rated at or above the maximum ambient and maximum fluid temperature.

• Minimum temperature

What is the lowest temperature the hose assembly will endure? For a hydraulic system, consider the minimum ambient temperature. Make sure your hose is rated at or below the minimum ambient temperature of the assembly&#;s environment.

Note that maximum assembly working pressures will decrease as temperatures increase.

Application

This is about the conditions of use. The hose assembly you use will be determined by its application, which may be:

• High Impulse: When a hydraulic system is subjected to frequent pressure spikes.
• Low Impulse: When a hydraulic system is rarely subjected to pressure spikes.
• Non-flexing: There is no bending or flexing from articulation of the equipment.
• Flexing: You know there will be bending or flexing due to articulation or movement of the equipment.
• Vacuum: The hose assembly is exposed to negative pressure (less than atmospheric).

Other points to consider:

• If your application is outside, be aware that UV rays, salt water, air pollutants, temperature, electricity, abrasion, paint application will shorten the life of your hose assembly.
• Static charge discharge will perforate the hose tube. Use conductive tube solutions when conveying non-polar, or mixtures of non-polar, liquids.
• If your hose assembly will be around electrical lines, use hoses rated as non-conductive. Otherwise, your hoses and the fluids being conveyed will have electrical conductivity issues.
• Are there any regulatory standards your hose must meet, such as SAE, USCG, EN/DIN, or ABS?
• Never place hoses in a place where they can be pulled. Exposing hoses to axial loads when they&#;re designed to hold pressure and convey fluids will cause premature failure. If you have any, unusual applications get the hose manufacturer&#;s approval. Additional independent testing may be needed.

In addition to the points above, ask yourself these questions:

• Where will the hose be used?
• What is the equipment type?
• Is the hose material compatible with the conveyed fluid, as it should be?
• What is the type of thread end connection?
• What about working and surge pressures?
• Will the hose need to stand up to:

&#; Abrasions?
&#; Vibrations?
&#; Oil, and if so, which type?
&#; Acids?
&#; UV rays?
&#; Salt water?

• Will you have permanent or field attachable couplings?
• Does your application involve suction?
• Do you have any routing requirements?
• What is your minimum bend radius?
• Will your hose be subjected to excessive abrasion?

Hose material selection

Material or media, as it&#;s also called, refers to what is flowing through the hose, the type and the concentration. The hose inner tube and cover material must be compatible with the conveyed material you&#;re using. That&#;s not all. Every component of your hose assembly &#; ends, O-rings, for example &#; must be compatible with the material you&#;re using.

Note, concentration, pressure, and temperature can impact the compatibility of the hose and fluid.

The result of failing to ensure compatibility is permeation, or effusion. This happens when a substance moves through the hose tube walls, causing the hose to degrade, blister and possibly worse. This is especially a problem if the material being conveyed is compressed gas.

To ensure the quality of each hydraulic hose, all hydraulic hoses must be tested strictly to satisfy the hydraulic hose testing standards.

The hydraulic hose quality is defined and evaluated by SAE standards, EN standards, and ISO standards. These hydraulic hose testing standards are most widely used all over the world.

These hydraulic hose testing standards are basically important to scale the hydraulic hose quality satisfaction after the hydraulic hose manufacturing process.

How Often Should Hydraulic Hose Be Tested?

Our hydraulic hoses are applied for heavy-duty machinery, it is the first important thing to use the hydraulic hose with safety.

Goto HESPER to know more.

So the hydraulic hose annual test is the must-have action to help you find out the potential problems in time. The hydraulic hose damage failure can cause serious problems in running the heavy-duty machine.

We do recommend that you can test hydraulic hoses once a year at least, even once a quarter. And you need to check the hydraulic hoses regularly if you store them in the hydraulic hose warehouse for a very long time.

Here are many places of the hydraulic hose you need to test, including hydraulic hose fittings, hydraulic hose heads and hydraulic hose ends, especially the places near the hydraulic line of the hydraulic system.

If you find something abnormal, such as hydraulic hose leaking, or hydraulic fluid exudation, please fix the hydraulic hose or replace it at once.

It is necessary for you to prepare the easy-use hydraulic hose tester at home, or in your hydraulic hose warehouse to test hydraulic hose in your daily life. And you can go to the hydraulic hose shop to test the hydraulic hose using the expert hydraulic hose testing equipment.

In a word, annual testing for hydraulic hoses is important, please keep it in your mind all the time.

Hydraulic Hose Impulse Testing

The hydraulic hose impulse testing is basically important to test hydraulic hose abrasion. The impulse testing for the hydraulic hose is one of the most key testing projects to predict the hydraulic hose service life.

The impulse testing for hydraulic hoses can involve the pressurizing or cycling of hydraulic hose pressure, regularly times up to 200% of working pressure. Each finished hydraulic hose will be stuck to the hydraulic hose impulse tester machine with a certain bend radius, 90° or 180°,  and keep this position for almost 3 days without stopping.

The hydraulic hose impulse testing is strict and serious to predict the shelf life of the hydraulic hose before you buy them to your place. The hydraulic hose impulse testing must meet or exceed the minimum number of impulse cycles, to ensure that the hydraulic hose can be used for the industry field.

You can read the working pressure and burst pressure printed on the hydraulic hose layline, and get to know that the bursting pressure is much higher than the working pressure.

Our hydraulic hose impulse cycles are up to 200,000 times, to mimic that the hydraulic hose is used in the worst working condition. So that you can use the hydraulic hose with safely and protection, without any potential problems such as hydraulic hose abrasion, hydraulic hose leaking, etc.

Hydraulic Hose Salt Spray Test

The salt spray test also called the salt fog test, is the method to test the hydraulic hose corrosion resistance. The hydraulic hose salt spray test can simulate a harsh environment to do a corrosive attack on the hydraulic hose cover and coating during the testing procedure.

This magic salt spray test can accelerate the corrosion speed to create a salt fog environment to test the hydraulic hose&#;s durability. Our hydraulic hose will pass this salt spray testing due to the top-rated synthetic rubber material&#;s stable performance.

Also, we can make complex hydraulic hose coating, to enhance the ability to avoid corrosion harm. Here we have wrapped hydraulic hose, designed with a protective outer cover to ensure that your hydraulic hose can be used longer.

Hydraulic Hose Burst Test

The hydraulic hose burst test is the hydrostatic pressure test of the hydraulic hose assembly,  which can determine the hydraulic hose&#;s actual burst strength.

The hydraulic hose failure will happen, if the hydraulic hose begins to leak, bulge, or burst when used in the minimum rated burst pressure. And the maximum burst pressure is a super important operating performance that a hydraulic hose technique must know, respect, and follow to ensure the hydraulic hose can be used safely.

You have to read the hydraulic hose layline to get the hydraulic hose burst pressure before you buy hydraulic hoses in the local hydraulic hose shop, and of course, you can consult your desired hydraulic hose to meet your burst pressure range.

Regularly, the burst pressure is up to 4 times the working pressure, the burst pressure is much higher to ensure the hydraulic hose safety during its normal working process.

You guys can get to know more about hydraulic hose working pressure and bursting working to help you find the most suitable hydraulic hose for your project.

Hydraulic Hose Cold Flex Test

The hydraulic hose will be used in various conditions, including warm temperature to ambient temperature.

The hydraulic hose cold flex test is also the cold flexibility test, this test can notify that if you can use the hydraulic hose in the cold ambient temperature.

A certified hydraulic hose is flexible so that it can&#;t crack, leak, or break while in harsh cold working conditions. And our hydraulic hose can be used in cold places, with a low temperature that is rated at &#;70° F (&#;57° C).

The synthetic rubber hose is flexible with the proper bend radius, soft and flexible, so the hydraulic hose can&#;t be frozen and then become cracked. You can still use the hydraulic hose even if you are living in extremely cold places where exist snow and ice.

Final Thoughts

If you have any questions about the hydraulic hose testing, please feel free to contact us at any time if you need. For more, you can get Free hydraulic hose samples from us now.

For more China Hydraulic Rubber Hoseinformation, please contact us. We will provide professional answers.