SAE100 R1AT and SAE100 R2AT are both wire-reinforced hydraulic hoses, but their main difference is reinforcement: R1AT has one layer of high-tensile steel-wire braid, while R2AT has two. The extra braid generally gives R2AT a higher working-pressure capability in comparable sizes, so it is often selected for more demanding pressure conditions. R1AT can be a suitable choice when its size-specific pressure rating meets the system requirement and a single-braid hose is appropriate. The right option depends on the hose’s diameter, working pressure, fluid, temperature, routing, and the applicable manufacturer specifications—not the designation alone.
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Both types are intended for hydraulic service, but neither should be selected based only on a general assumption that “two braids are always better.” Using a hose with an unsuitable pressure rating or bend radius can create a system risk, while specifying a higher-rated construction than necessary may affect procurement cost and installation flexibility. Always verify the product datasheet against the operating conditions and relevant standard requirements.
The reinforcement is the clearest structural distinction. R1AT uses one braid of steel wire around the inner tube, while R2AT uses two braided wire layers. In both constructions, the inner tube carries the fluid and the outer cover helps protect the hose from external conditions; exact materials and construction details should be confirmed with the supplier’s specification.
The additional reinforcement in R2AT is associated with a higher pressure capability in comparable sizes. However, the pressure rating is not a single universal value for every R1AT or R2AT hose. It changes with nominal size and product construction, so buyers should compare the manufacturer’s working-pressure figures for the precise hose and size they intend to purchase.
A hose designation does not replace a pressure table. When reviewing a quotation or datasheet, distinguish working pressure from burst pressure, and make sure the system’s maximum operating pressure—including applicable pressure surges—is within the hose’s rated limits. The hose assembly must also be compatible with the fittings and assembly method specified for that hose.
Nominal size matters too. For example, dash size -8 corresponds to a nominal inside diameter of 1/2 inch, but the actual outside diameter and pressure rating depend on the hose construction. Compare R1AT and R2AT at the same nominal size before drawing conclusions about their pressure suitability or routing requirements.
| Comparison point | SAE100 R1AT | SAE100 R2AT |
|---|---|---|
| Wire reinforcement | One steel-wire braid | Two steel-wire braids |
| Pressure selection | Use the working-pressure rating for the specific size and product | Use the working-pressure rating for the specific size and product; often selected for higher-pressure needs |
| Typical selection context | Hydraulic circuits where its rated capacity meets system requirements | Hydraulic circuits requiring the applicable higher size-specific rating |
| Key checks | Fluid compatibility, temperature, bend radius, fittings, routing, and operating conditions | |
Temperature suitability depends on the hose materials and the fluid being conveyed. SAE100 R1AT and R2AT products are commonly specified for operating temperatures from -40°C to +100°C with compatible petroleum-based hydraulic fluids, but this range is not a substitute for checking the exact product datasheet. Different fluids or service conditions can require a different temperature limit.
Confirm compatibility with the hydraulic fluid, including any additives, as well as with the outside environment. Heat, abrasion, weather exposure, and contact with other substances can influence product suitability and service life. If the application involves a special fluid or unusual environmental exposure, provide those details to the hose supplier before ordering.
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Installation can also affect performance. Check the minimum bend radius for the selected size and avoid twisting, sharp bends, or routing that places excessive strain on the hose or its connections. A more pressure-capable hose is not automatically the best choice if it cannot be routed correctly in the available space.
R1AT may suit hydraulic equipment and circuits when its rated pressure, size, and environmental limits meet the application requirements. It can be considered for standard hydraulic lines where the system designer has verified the pressure rating and assembly compatibility. The choice should be based on the actual duty conditions rather than on a general category such as “low pressure.”
R2AT may be appropriate when a higher working-pressure rating is required for the selected size, provided that its bend radius, fittings, and other specifications also suit the installation. It is commonly considered for more demanding hydraulic circuits, but the exact application limit must still come from the product data. Do not assume that R2AT is suitable for every high-pressure system without checking the rating and assembly details.
R2AT contains an additional reinforcement layer, which can affect material use and product cost, but the actual price depends on size, order quantity, specification, and supplier terms. R1AT should not be chosen simply because it may be less expensive: it must meet the system’s rated pressure and service requirements. Likewise, buying R2AT without a defined need may add cost without resolving other issues such as incorrect fittings or unsuitable routing.
For an accurate comparison, request quotations for the same nominal size and clearly state the required standard, working pressure, fluid, temperature range, hose length, fittings, and order quantity. Ask suppliers to identify the product’s size-specific ratings and applicable tolerances in their documentation. This makes it easier to compare like for like and reduces the risk of ordering a hose that does not match the intended assembly.
A frequent mistake is selecting R1AT or R2AT based only on the number of reinforcement layers. Other common errors include using burst pressure as the operating limit, overlooking pressure spikes, and assuming all products with the same designation have identical ratings. If the application conditions are uncertain, share the system details with a qualified hose supplier or engineer before finalizing the order.
The essential difference is that SAE100 R1AT has one steel-wire braid and SAE100 R2AT has two. R2AT is often selected where the applicable size-specific pressure rating needs to be higher, while R1AT can be suitable when its documented rating meets the system requirements. Neither type is universally better; the correct selection depends on pressure, size, fluid, temperature, routing, and compatible fittings.
Before placing an order, compare the datasheets for the exact hose size and request confirmation of the operating conditions and assembly requirements. Hengshui Xinchi Hose Manufacturing Co., Ltd. can support B2B buyers comparing hydraulic hose specifications and sourcing requirements. Share your required size, operating pressure, fluid, temperature, fittings, and order quantity to request a product recommendation or quotation.
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