Hydraulic Hose SAE R3

 

Recommended For:Low-pressure hydraulic lines. Meets or exceeds the requirements of SAE 100R3AT.
Tube:Black, oil resistant, synthetic rubber.
Reinforcement:Two braids fiber layer 
Cover:Black, oil, abrasion and weather resistant, thin synthetic rubber.
Temperature Range:-40℉ to +250℉ (-40℃ to +121℃)

 

 

STANDARD: SAE 100 R3

 

Item  Code	Hose  I.D.		Hose  O.D.		Working  Pressure		Burst  Pressure		Min.Bend  Radius		Weight
	mm	inch	min	max	Mpa	psi	MPa	psi	mm	inch	kg/m	lb/ft
R3-05	5	3/16	11.9	13.5	10.5	1522.5	42	6090	75	3	0.16	0.11
R3-06	6.3	1/4	13.5	15.1	8.7	1261.5	35	5075	75	3	0.18	0.12
R3-08	8	5/16	16.7	18.3	8.4	1218	33.5	4857.5	100	4	0.27	0.18
R3-10	10	3/8	18.3	19.8	7.8	1131	31.5	4567.5	100	4	0.31	0.21
R3-13	12.5	1/2	23	24.6	7	1015	28	4060	125	5	0.45	0.3
R3-16	16	5/8	26.2	27.8	6.1	884.5	24.5	3552.5	140	5.5	0.53	0.36
R3-19	19	3/4	31	32.5	5.2	754	21	3045	150	6	0.72	0.48
R3-25	25	1	36.9	39.3	3.9	565.5	15.7	2276.5	205	8	0.9	0.6
R3-32	31.5	1 1/4	42.9	46	2.6	377	10.5	1522.5	250	10	1.07	0.72

 

 

SAE100 R3 is used for medium-pressure hydraulic pipelines. SAE 100 R3 should be used with petroleum- or water-based hydraulic fluid; The inner and outer rubbers are oil-resistant synthetic rubber, and the reinforcement layer is two layers of fiber braided layer. Hydraulic hose SAE100 R3 has a long service life. Meets or exceeds requirements of SAE100R3 and EN854.

What is a R3 hydraulic hose?

SAE100 R3 hydraulic hose consists of an inner layer of oil-resistant synthetic rubber, two layers of high-strength fiber layers and an outer layer of oil-resistant and weather-resistant synthetic rubber. It is a medium-pressure hydraulic hose, suitable for petroleum or water based hydraulic fluids, such as air compressors, printing machinery, industrial vehicles, agricultural machinery and construction engineering machinery, etc.

 

What is the material of the braids in an SAE100R3 hose?

SAE 100R3 hose is mainly for medium-pressure conditions. The reinforcement layer is two layers of high-tenacity textile braid.

 

What does sae 100 mean?

SAE is the abbreviation of the Society of Automotive Engineers, which is responsible for formulating and managing the specifications of hydraulic oil. ‌100‌ indicates that this is a standard number for hydraulic oil.

What is the pressure rating of R3 hose?

The inner diameter size of SAE 100R3 rubber hydraulic hose ranges from 1/4″ to 1-1/4″. The working pressure is 377PSi ~ 1523PSI, which is a medium-pressure hydraulic hose. The larger the inner diameter, the smaller the pressure it can withstand. The bursting pressure is four times the working pressure, and it has a higher safety factor.

 

Why Fiber-Reinforced SAE 100 R3 Hoses Are Reliable for Construction and Agricultural Machinery

 

The SAE 100 R3 hydraulic hose is widely recognized as a reliable component for construction and agricultural machinery due to its specific fiber-reinforced structure and robust material composition, which are essential for enduring the demanding, medium-pressure hydraulic lines in these heavy-duty applications.

The fundamental element of its reliability is the reinforcement layer comprised of two braids fiber layer (or high-tenacity textile braid). Unlike steel-wire reinforced hoses used for extreme high pressures, this fiber reinforcement is perfectly suited for medium-pressure hydraulic lines, offering an optimal balance of strength, flexibility, and cost-effectiveness. This braided structure provides the necessary strength to contain the hydraulic fluid, ensuring the hose can reliably operate at its specified working pressures without expanding or rupturing. The construction machinery and agricultural equipment frequently subject hydraulic systems to cyclical pressure surges; the fiber braids effectively manage these dynamic loads, thereby preventing structural failure and ensuring continuous operation.

Furthermore, the materials used in the inner and outer layers of the SAE 100 R3 hose are key to its longevity in harsh environments. The tube is made of oil resistant, synthetic rubber, making it chemically compatible with the petroleum- or water-based hydraulic fluid commonly used in machinery. This resistance prevents the inner tube from swelling, hardening, or degrading due to fluid exposure. Concurrently, the cover is a thin, synthetic rubber that is designed to be oil, abrasion and weather resistant. Construction and agricultural machinery often operate in environments with external oil spills, dirt, and exposure to sun and rain; the outer cover protects the reinforcement layer from physical damage and environmental factors, guaranteeing the hose's extended service life.
This combination of chemically resistant inner and outer layers surrounding a strong, flexible fiber reinforcement makes the SAE 100 R3 hose a dependable and durable choice for ensuring the safe and efficient function of hydraulic systems in the field.

 

Temperature and Fluid Compatibility: How R3 hydraulic hose Performs in Harsh Working Conditions

 

The R3 hydraulic hose is designed with specific temperature and fluid compatibility characteristics that allow it to perform reliably even in harsh working conditions, which are typical for applications like air compressors, industrial vehicles, and construction engineering machinery.

Regarding fluid compatibility, the R3 hydraulic hose is constructed with an inner layer of oil-resistant synthetic rubber. This specialized tube material is engineered to remain chemically stable when conveying either petroleum- or water-based hydraulic fluid. Many industrial and agricultural machines utilize these fluids, and the tube's resistance ensures that the hose does not suffer internal degradation, such as swelling, hardening, or contamination of the fluid. Maintaining fluid integrity and tube structure is essential for long service life and reliable system performance.

In terms of temperature performance, the R3 hydraulic hose is designed to operate across a broad range. The temperature range specification indicates that it can function effectively from -40℉ to +250℉ (-40℃ to +121℃). This wide temperature range adaptability is crucial for machinery that may operate outdoors in freezing conditions or in industrial settings where engine heat or high ambient temperatures are present. The inner and outer synthetic rubber materials are formulated to resist structural changes—such as embrittlement at low temperatures or softening at high temperatures—thereby guaranteeing that the hose maintains its flexibility, pressure rating, and sealing integrity under thermal stress.

Furthermore, the outer layer of the hose is specifically formulated to be weather resistant. This feature ensures the hose withstands exposure to environmental factors like UV radiation, ozone, rain, and snow, which are common in outdoor construction and agricultural environments. This dual resistance—internal chemical compatibility and external weather resistance—ensures the R3 hydraulic hose delivers stable performance across the challenging thermal and chemical conditions found in harsh working environments.

 

How to Extend the Service Life of Your SAE 100 R3 Medium-Pressure Hydraulic Hose

 

To significantly extend the service life of your SAE 100 R3 medium-pressure hydraulic hose, proper selection, installation, handling, and storage are critical, capitalizing on the hose’s built-in durability features while mitigating external stresses.

First, correct selection is fundamental. Although the SAE 100 R3 hose is rated for medium pressure, it is essential to ensure the hose's inner diameter size and working pressure are correctly matched to the specific machinery application. Using a hose that is undersized or operating it consistently at the upper limits of its pressure rating will accelerate fatigue and shorten its life. As the product content notes, the larger the inner diameter, the smaller the pressure it can withstand; thus, proper sizing prevents premature failure. The inherent high safety factor (bursting pressure being four times the working pressure) provides a margin, but it should not be relied upon for continuous over-pressurization.

Second, proper handling during operation and installation minimizes damage to the outer layer. The cover is designed to be abrasion resistant and protect the two braids fiber layer reinforcement. However, excessive dragging over sharp edges, constant rubbing against machinery parts, or severe kinking will compromise the outer synthetic rubber layer, exposing the reinforcement to chemical and environmental degradation. Regular inspection for cuts or wear spots and ensuring the hose runs through the machine without excessive bends or twists will preserve its structural integrity.

Finally, appropriate storage when the equipment is idle is necessary. Hoses should be stored in a well-ventilated warehouse away from extreme heat sources, with the temperature not exceeding 40 degrees. It is crucial to avoid prolonged exposure of the pipe to sunlight, as UV radiation accelerates the aging and hardening of the synthetic rubber materials, even with the weather resistant cover. Following these guidelines ensures the SAE 100 R3 hose maximizes its designed long service life by protecting its chemically resistant inner tube and durable outer cover from avoidable stress.