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You are here: Home > DHH Blog > February 2018 > Get To Know Your Hydraulic Hose


The layline of your hydraulic hose gives you a lot of information about your specific hose.

When your looking to replace a hydraulic hose, this information enables us to ensure you get the right hose to do the job. Having this information when calling or placing your order online will speed up the process and eliminate some confusion in choosing the right hose.

Starting at the left, the hose should have printed on it the ID or Inside Diameter of the hose. This is the area fluid will pass through, so in this example above, you have a 1" inside diameter for fluid to flow.

The next part, and possibly one of the more critical parts of the hose, is the SAE spec or standard. SAE, the Society of Automotive Engineers has created a series of specifications that relate to hydraulic hoses, and their construction, pressure rating, etc. This information stamped on the hose tells us what standard your hose is made to, and we carry a wide range of SAE standard hoses, such as SAE 100R4 as shown in the photo. SAE 100R4 is a suction hose, low pressure, usually made of one or more piles of woven or braided textile fibers. That 100R4 designation gives us this information. (more on SAE specs can be found here)

Next up is the pressure rating of the hose, usually expressed in PSI. A hose may have two numbers, such as 4,000/12,000 which usually indicates a Working Pressure/Burst Pressure. Hydraulic hoses are typically made with a 4:1 safety factor built in.

A brand name is commonly found on the layline of the hose as well. In this example, our private labeled brand, Hydraulax is found on the hose. This information is useful when trying to find crimp specifications or data about the manufacturer of the hose.

Finally, you will find the date of manufacture. This is expressed in what quarter of the year the hose was made, followed by the two digit year. Hydraulic hose has a shelf life on average of 10 years. We are always refreshing our stock, and typically no hose in our warehouse is more than 2 - 3 years old. Over time, hoses will break down by just sitting on a shelf being exposed to the elements. It is not recommended to install hoses that have a shelf life over 10 years old.

Your hose may have additional data, such as an MSHA (Mine Safety and Health Administration) indication, meaning it is approved for use in Mining applications and features a flame resistant cover.

Whew! That's a lot of data. Now that you know a little more about how to read a layline, snap us a photo of your hydraulic hose in action on your machine, and tag us on Instagram @discounthh, or email it to photos@discounthydraulichose.com. We will send back a code for Free Ground Shipping on your next order!

Have any questions on your specific hose? Feel free to contact us by phone at 800-535-1302, or email or livechat with us today!

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