EN 857 1SC vs 2SC: Choosing Compact Hose by Pressure and Space
Choose EN 857 1SC when the circuit’s required working pressure is within the hose’s rated limit and a lighter, more flexible assembly helps with routing. Choose EN 857 2SC when the required pressure is higher and the installation can accommodate its typically heavier, stiffer construction. Neither type is automatically the better compact hose: compare the pressure rating, hose size, minimum bend radius, and outside diameter for the exact product before specifying it.
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As a representative catalog comparison, a DN10 hose may be listed at about 180 bar working pressure for 1SC and 330 bar for 2SC. Ratings vary by size and product, so treat these figures as examples rather than universal EN 857 values. Below, we explain how to make the choice based on your circuit and installation rather than on the hose label alone.
Quick comparison: EN 857 1SC and 2SC
Both hose types are compact hydraulic hoses with a rubber tube, steel-wire reinforcement, and an outer cover. The key construction difference is reinforcement: 1SC uses one steel-wire braid, while 2SC uses two. The additional reinforcement in 2SC generally supports higher working-pressure ratings, while 1SC may be preferable where flexibility, weight, and routing space matter.
| Comparison point | EN 857 1SC | EN 857 2SC |
|---|---|---|
| Reinforcement | One steel-wire braid | Two steel-wire braids |
| Pressure selection | For applications within the specific size’s rated pressure | Often selected when a higher pressure rating is required |
| Installation considerations | Often lighter and easier to route | Often heavier and less flexible; check actual dimensions |
| Best comparison method | Check the supplier’s size-specific pressure, outside-diameter, and bend-radius data | |
How pressure should guide the choice
Start with the circuit’s maximum pressure
Use the maximum pressure the hose may encounter in service, not just the system’s usual operating pressure. Consider pressure peaks and transients if they are part of the equipment’s operating conditions. Then compare that requirement with the working-pressure rating for the exact hose size and product construction.
For example, representative product tables may list DN10 EN 857 1SC at around 180 bar and DN10 EN 857 2SC at around 330 bar. These are useful illustrations of the difference buyers may encounter, but they are not guaranteed values for every manufacturer. Confirm the rating on the supplier’s current datasheet and ensure the complete assembly—including fittings—suits the application.
Do not treat burst pressure as working pressure
Working pressure is the relevant rating for normal operation; burst pressure is not a usable operating target. Hydraulic hose specifications commonly use a burst-to-working-pressure ratio of 4:1, but buyers should verify the applicable product documentation rather than assume a ratio. The system design must also account for compatible fluid, temperature, impulse duty, and the manufacturer’s installation instructions.
How installation space should guide the choice
Compare dimensions, not just reinforcement layers
When space is tight, check the hose’s actual outside diameter and minimum bend radius in the size you plan to buy. A single-braid hose is often a useful option for lighter, more manageable routing, but the label alone cannot establish how compact a finished assembly will be. Different product designs, sizes, and fitting arrangements can change the space required.
Map the route from port to port and note the available clearance, bend locations, and movement during operation. Avoid forcing a hose into a tighter curve than its specified minimum bend radius. A route that looks short on a drawing may still create a poor installation if it pulls at the fittings, rubs against nearby components, or restricts movement.
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Account for the complete assembly
Hose selection is only one part of the space calculation. Coupling length, fitting orientation, and the space needed for installation can affect whether an assembly fits. Ask the supplier to confirm hose and fitting dimensions together, particularly when replacing an existing line or fitting a compact machine.
Choose by application and trade-off
When EN 857 1SC may be the better fit
Consider 1SC when its size-specific pressure rating meets the circuit requirement and the installation benefits from a hose that is typically lighter or easier to route. It can suit compact equipment and lines where handling and available space are important selection factors. It is not a substitute for a higher-rated hose if the application’s pressure exceeds its documented working limit.
When EN 857 2SC may be the better fit
Consider 2SC when the required working pressure rules out the available 1SC option in the required bore size. It can also provide a practical choice where the equipment specification calls for a two-braid construction. Before selecting it for a restricted route, check its actual outside diameter and bend radius; higher pressure capacity alone does not confirm installation compatibility.
When neither option is right
If neither hose’s pressure rating and dimensions satisfy the application, do not compromise by choosing the closest-looking option. Review the required bore, routing, fluid compatibility, temperature range, and duty cycle with your hose supplier or equipment engineer. A different hose specification or a revised routing plan may be needed.
Buyer checklist before ordering
- Confirm the size: Specify the nominal hose size and required internal diameter, using the equipment drawing or existing assembly as a reference.
- Confirm pressure: Provide the maximum working pressure and disclose known pressure peaks or impulse requirements.
- Check routing: Share the available space, bend locations, required hose length, and any movement in service.
- Verify compatibility: Confirm the hydraulic fluid and operating temperature against the manufacturer’s product information.
- Specify fittings: Identify fitting type, thread, orientation, and any assembly requirements.
- Request documentation: Ask for the current size-specific datasheet, pressure rating, and dimensional information before approval.
Common selection mistakes
- Choosing by pressure class alone: The rating must match the exact size and product, not just “1SC” or “2SC.”
- Using burst pressure as the operating limit: Select against the documented working-pressure rating.
- Assuming 2SC will fit the same route: Confirm outside diameter, bend radius, and fitting clearance.
- Ignoring assembly details: A compatible hose with unsuitable fittings or length can still fail to meet installation needs.
- Overlooking service conditions: Fluid, temperature, movement, and routing can affect suitability and service life.
How XINCHI can support your sourcing decision
At XINCHI, we support B2B buyers comparing rubber hydraulic hose options by reviewing the size, pressure requirement, operating conditions, and installation constraints they provide. We can help identify the product information needed for a like-for-like comparison and discuss hose and fitting requirements for an assembly. Final selection should be based on the confirmed product datasheet and the equipment’s design requirements.
For a quotation or product review, share the hose size, maximum working pressure, fluid, temperature range, required length, fitting details, and any available routing dimensions. This information helps us assess whether 1SC or 2SC is the more appropriate starting point and identify details that need confirmation before ordering.
Final recommendation
Choose EN 857 1SC when its documented working-pressure rating meets your requirements and its handling or routing advantages suit the available space. Choose EN 857 2SC when a higher size-specific pressure rating is needed and the assembly dimensions fit the route. Before placing an order, verify the exact pressure rating, outside diameter, minimum bend radius, and fittings against the supplier’s current documentation.