Jun. 10, 2024
Hydraulic hoses are a critical component of any hydraulic system. As a means of delivering hydraulic fluid, the right hydraulic hose is critical to the safe and efficient use of a hydraulic system in any application.
To get the right hydraulic hose for the job, there are a number of hydraulic hose standards that you need to know. This concise article will explain everything you need to know.
Hydraulic hose standards include a range of different national and international standards covering hydraulic hose assembly, hydraulic hose crimping, hydraulic hose testing and hydraulic hose performance (including hydraulic hose size, strength and flexibility). These standards ensure that hose manufacturers meet safety and performance requirements.
There are several different national and international standards for hydraulic hoses with varying measurements, tolerances and parameters, depending on the geographical location.
For example, both the European Standard (EN) and the International Standards Organization (ISO) have developed their own hydraulic hose standards, but these standards differ from each other.
In North America, the typical hydraulic hose standard is set by the Society of Automotive Engineers (SAE). This organization provides a series of hydraulic hose standards in the 100R series, defined under SAE Standard J517.
The 100R series of hydraulic hose standards differentiates hoses based on their construction and ideal conditions of use, including temperature, pressure, and fluid type.
Reinforcement: Single braid steel.
Diameter Range: 3/16” to 2”
Max. Operating Pressure: 575 to 3,250 psi
Min. Bend Radius: 3.5” to 25”
Usage: General use high-pressure hydraulic hose.
Reinforcement: Two braids steel.
Diameter Range: 3/16” to 2”
Max. Operating Pressure: 1,150 to 6,000 psi
Min. Bend Radius: 3.5” to 25”
Usage: Good for outdoor uses like construction and mining, as well as on mobile equipment.
Reinforcement: Two braids textile.
Diameter Range: 3/16” to 1-1/4”
Max. Operating Pressure: 375 to 1,500 psi
Min. Bend Radius: 3” to 10”
Usage: General use as a low-pressure hydraulic hose, including antifreeze and hydraulic oil.
Reinforcement: Single or more braid textile with spiral wire.
Diameter Range: 3/4″ to 4”
Max. Operating Pressure: 35 to 300 psi
Min. Bend Radius: 5” to 24”
Usage: Typically used as suction and return hoses for hydraulic systems.
Reinforcement: Two braids textile with steel braid between. Braids have mildew-resistant compounds to resist wear.
Diameter Range: 3/16” to 3-1/16”
Max. Operating Pressure: 35 to 300 psi
Min. Bend Radius: 3” to 33”
Usage: Meant for medium-pressure applications, used in many automotive situations, including air brakes and power steering systems.
Reinforcement: Single braid or spiral textile.
Diameter Range: 3/16” to 3/4″
Max. Operating Pressure: 300 to 500 psi
Min. Bend Radius: 2” to 6”
Usage: General use as a low-pressure hydraulic hose.
Tube: Thermoplastic.
Temperature: -40° to 93°C
Cover: Thermoplastic.
Reinforcement: Synthetic fiber.
Diameter Range: 1/8” to 1”
Max. Operating Pressure: 1,000 to 3,000 psi
Min. Bend Radius: 1” to 12”
Usage: Medium-pressure, non-conductive settings where steel reinforcement is not allowed.
Tube: Thermoplastic.
Temperature: -40° to 93°C
Cover: Thermoplastic.
Reinforcement: Synthetic fiber.
Diameter Range: 1/8” to 1”
Max. Operating Pressure: 2,000 to 6,000 psi
Min. Bend Radius: 1” to 12”
Usage: High-pressure, non-conductive settings where steel reinforcement is not allowed.
For petroleum-based and water-based hydraulic fluids.
Temperatures from 140° to 100° C.
Type A: Synthetic rubber, four steel wires helically wound in alternating directions, synthetic rubber cover. May include braid of material connecting synthetic rubber to steel wire.
Type AT is the same as Type A, but with a cap.
Temperature: -40° to 121°C
Reinforcement: Four steel wire spirals.
Diameter Range: 3/8” to 2”
Max. Operating Pressure: 2,500 to 4,000 psi
Min. Bend Radius: 5” to 25”
Usage: High-pressure applications in heavy-duty service settings.
Temperature: -40° to 121°C
Reinforcement: Multiple steel wire spirals.
Diameter Range: 3/4″ to 2”
Max. Operating Pressure: 5,000 psi
Min. Bend Radius: 9.5” to 25”
Usage: High-pressure applications, where there is a high likelihood of pressure spikes, like forklifts or construction machinery.
Tube: PTFE (Type B hose has conductive inner layer)
Temperature: -54° to 204°C
Reinforcement: Single braid steel.
Diameter Range: 3/16” to 1-1/4”
Max. Operating Pressure: 600 to 1,500 psi
Min. Bend Radius: 1-1/2” to 16”
Usage: High-pressure applications handling superheated fluids.
Temperature: -40° to 121°C
Reinforcement: Multiple steel wire spirals.
Diameter Range: 3/8” to 1-1/2”
Max. Operating Pressure: 6,000 psi
Min. Bend Radius: 6” to 21”
Usage: For petroleum-based fluids only. High-pressure applications with steady working pressure, including logging, agriculture, and oilfield equipment.
Reinforcement: One or two braids steel.
Diameter Range: 1/4″ to 1-1/4”
Max. Operating Pressure: 1,800 to 5,800 psi
Min. Bend Radius: 2” to 8”
Usage: High-pressure applications, where hose needs to be especially flexible.
Reinforcement: One or two steel braids.
Diameter range: 3/16 in. to 1 in.
Maximum Working Pressure: 3,000 psi Working Pressure: 3,000 psi
Minimum Bend Radius Bend Radius: 2 in. to 6 in.
Uses: High-pressure applications, rated for general industrial use.
Although these SAE hydraulic hose standards are widely accepted and used in the industry, SAE does not guarantee that products meet these standards. Be sure to purchase hydraulic hose from a reputable supplier to ensure that you are purchasing a high quality item that meets the hydraulic hose standards.
You'll also find that many manufacturers offer products that go beyond the SAE hydraulic hose standards, giving you more flexibility when using them in specific applications. Some hoses have higher temperature or pressure ratings, or smaller bend radii.
If you're looking for the right hydraulic hose for your equipment, contact the experts at SANYEFLEX today. Our experienced technicians can ensure that you get the standard of hydraulic hose that meets your specific needs. If you need a hose supplier, we can help SANYEFLEX now offers products from brands we trust. Contact us today for all your hydraulic hose needs.
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