SAE100 R1AT vs R2AT: Reinforcement, Pressure, and Application Differences
SAE 100R1AT and SAE 100R2AT are hydraulic hose types distinguished mainly by the number of steel-wire braid reinforcement layers: R1AT has one, while R2AT has two. The extra braid generally allows R2AT to handle higher working pressure at the same nominal size, but it can also make the hose heavier and less flexible. Choose R1AT when its published pressure rating meets the system requirement; choose R2AT when the required pressure exceeds that rating or the application specification calls for two-wire-braid hose. Always confirm the selected hose’s size-specific ratings and compatibility with the fluid, temperature, fittings, and operating conditions.
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Quick comparison: R1AT and R2AT
Both hose types are used to convey hydraulic fluids and typically have an oil-resistant synthetic-rubber tube, steel-wire braid reinforcement, and a rubber cover. Their construction is similar, but the additional reinforcement in R2AT changes its pressure capability and handling characteristics. A hose’s actual performance depends on its inside diameter, construction, materials, and manufacturer’s specifications, so a type designation alone is not enough to approve a product for a system.
- R1AT: one steel-wire braid; suitable when the specified working pressure is within the hose rating.
- R2AT: two steel-wire braids; commonly selected for higher-pressure requirements in the same size.
- For both: verify the exact working pressure, temperature range, fluid compatibility, bend radius, and assembly requirements before ordering.
Construction and key specification differences
Reinforcement: one braid versus two
In R1AT, a single braided steel-wire layer reinforces the hose against internal pressure. R2AT adds a second steel-wire braid, creating a stronger pressure-supporting structure in a comparable nominal size. This does not mean that every R2AT hose is interchangeable with every R1AT assembly: outside diameter, bend radius, fittings, and product ratings can differ.
The reinforcement difference is the clearest way to identify the design distinction, but it should not be treated as a complete specification. Buyers should request the manufacturer’s product data for the exact hose size and confirm that the hose and fittings are approved as an assembly. Where a project requires a particular standard or designation, verify the supplier’s documentation rather than relying on a product name alone.
Pressure ratings depend on size and product data
R2AT is generally the higher-pressure option, but working pressure changes with hose inside diameter and product construction. As an illustrative example, commonly published catalog ratings for a 1/2-inch (12.7 mm) hose are around 1,600 psi (11.0 MPa) for R1AT and 3,000 psi (20.7 MPa) for R2AT. These figures are examples, not universal ratings; the selected manufacturer’s current size-specific data sheet is the controlling reference for purchasing and design.
Do not select a hose by comparing working pressure alone. Check the specified minimum bend radius, temperature limits, fluid compatibility, and the pressure limits of the fittings and assembled hose. In many hydraulic hose specifications, the minimum burst pressure is expressed as a multiple of working pressure—for example, a 4:1 ratio may be specified—but buyers must verify the applicable standard and product documentation rather than assume the same requirement applies to every product.
| Comparison point | SAE 100R1AT | SAE 100R2AT |
|---|---|---|
| Steel-wire braid layers | 1 | 2 |
| Relative pressure capability | Typically lower in a comparable size; confirm the product rating | Typically higher in a comparable size; confirm the product rating |
| Handling considerations | May be easier to route where its pressure rating is adequate | Additional reinforcement may affect weight and flexibility |
| Selection basis | System requirements and size-specific manufacturer data | System requirements and size-specific manufacturer data |
Applications and suitability
When R1AT may be the right choice
R1AT can suit hydraulic lines where the system’s maximum operating pressure remains within the hose’s published rating and the application permits a single-wire-braid construction. Buyers may consider it for machinery, equipment, and general hydraulic circuits after checking operating conditions and connection requirements. Its suitability is determined by the complete system specification, not by an assumption that lower reinforcement automatically makes it the better value.
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When R2AT may be the better fit
R2AT is often considered when a circuit needs a higher pressure rating than an R1AT option of the same nominal size can provide. It may also be specified where the equipment design or procurement standard explicitly calls for two-wire-braid hose. Confirm that the hose’s flexibility and bend radius work with the available routing space, especially in compact assemblies.
Neither reinforcement type should be treated as a substitute for checking the full operating envelope. Pressure spikes, frequent flexing, external abrasion, temperature, and fluid type can affect hose selection and service suitability. If the application includes conditions outside the product data sheet, consult the hose supplier or equipment designer before placing an order.
How to choose between R1AT and R2AT
- Identify the required size. Confirm the inside diameter, connection type, and routing space for the line.
- Establish the pressure requirement. Include the system’s specified operating pressure and any pressure peaks identified by the equipment designer.
- Check the exact hose rating. Compare the required pressure with the manufacturer’s data for the selected size, not a rating taken from a different diameter.
- Review service conditions. Confirm fluid, temperature, bend radius, movement, and exposure to abrasion or other external conditions.
- Verify the complete assembly. Match the hose with compatible fittings and follow the supplier’s assembly and installation instructions.
A frequent sourcing mistake is to order “R2AT” without stating the size, fitting details, required working pressure, and application conditions. Another is to use a hose with a higher pressure rating as a direct replacement without checking whether its outside dimensions and bend radius fit the existing route. A clear technical inquiry helps the supplier identify the correct product and flag information that still needs confirmation.
Cost, sourcing, and supplier evaluation
R2AT contains an additional reinforcement braid, but the final purchase price depends on more than braid count. Hose diameter, length, fittings, order quantity, packaging, and required documentation can all affect a quotation. Compare offers on equivalent sizes and specifications, and ask suppliers to state the working-pressure rating and applicable product details in writing.
Lead time and minimum order quantities vary by supplier, product configuration, and stock availability, so request current terms instead of assuming standard delivery conditions. For project or repeat orders, confirm whether the supplier can maintain consistent specifications across batches and provide clear product identification. This is particularly useful when different hose types are used across multiple circuits or equipment models.
Summary and recommendation
The main difference is straightforward: SAE 100R1AT uses one steel-wire braid, while SAE 100R2AT uses two. R2AT generally offers a higher pressure capability in a comparable size, whereas R1AT may be suitable when its specific rating meets the system requirement and its physical characteristics fit the installation. Neither type can be selected reliably from the designation alone; check the size-specific data sheet and the full application requirements.
As a next step, provide your supplier with the hose size, required working pressure, fluid, temperature range, routing constraints, and fitting details. Hengshui Xinchi Hose Manufacturing Co., Ltd. can support B2B buyers by discussing SAE 100R1AT and R2AT hose requirements and helping clarify the information needed for product selection and quotation. Contact our team with your specification or application details so we can review the requested configuration with you.