EN 857 1SC vs 2SC: Choosing Compact Hose by Pressure and Space
For a compact hydraulic installation, choose EN 857 1SC when its size-specific working-pressure rating safely covers the system and its outside diameter and bend radius fit the available route. Choose EN 857 2SC when you need a higher pressure rating in a compact hose, provided its larger construction can be accommodated. As an illustration, supplier product tables commonly list a 1/2-inch hose at about 160 bar for 1SC and 330 bar for 2SC; the exact rating depends on the product and must be confirmed against its datasheet.
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At Hengshui Xinchi Hose Manufacturing Co., Ltd., we help buyers compare the actual operating conditions and installation dimensions rather than selecting by hose designation alone. The right choice depends on pressure peaks, hose size, temperature, fluid compatibility, routing, fittings, and the applicable manufacturer specifications.
Key Takeaways
- 1SC: A compact, single-wire-braid option for applications where the rated pressure is sufficient and routing space is restricted.
- 2SC: A compact, two-wire-braid option for applications requiring a higher pressure rating, subject to verification of its dimensions and bend radius.
- Do not compare labels alone: Ratings and dimensions vary by nominal bore and product construction. Compare the datasheets for the exact hose size.
- Size for the system: Include operating and peak pressure, fluid and temperature conditions, fittings, and installation geometry in the specification.
What Do EN 857 1SC and 2SC Mean?
EN 857 identifies a specification for compact hydraulic hose constructions. In the 1SC and 2SC designations, “SC” refers to compact hose types, while the number differentiates the reinforcement construction: 1SC uses one steel-wire braid and 2SC uses two. Both are intended for hydraulic applications, but their pressure capability and physical dimensions are not identical.
The reinforcement count is a useful starting point, not a complete purchasing specification. A higher braid count generally supports a higher working-pressure rating in a comparable hose size, but the final rating is product-specific. Hose size, cover and tube materials, manufacturing details, and the manufacturer’s validated specifications also matter.
EN 857 1SC vs 2SC: Main Differences
| Comparison point | EN 857 1SC | EN 857 2SC |
|---|---|---|
| Reinforcement | One steel-wire braid | Two steel-wire braids |
| Pressure selection | Suitable when the hose’s size-specific rating covers the application | Often selected when a higher size-specific pressure rating is required |
| Installation space | May be a better fit where the available envelope is limited | May have a larger outside diameter; check the product dimensions |
| Bend and routing | Confirm the minimum bend radius for the exact size | Confirm the minimum bend radius; do not assume it matches 1SC |
| Key verification | Pressure, dimensions, temperature, fluid, and fittings | Pressure, dimensions, temperature, fluid, and fittings |
Pressure: Compare the Rating for the Exact Size
Published product tables commonly show different pressure ratings across nominal bores, and 1SC and 2SC ratings can differ substantially for the same size. For example, some supplier tables list approximately 160 bar for 1/2-inch 1SC and 330 bar for 1/2-inch 2SC. Treat these as illustrative catalogue values, not a substitute for the selected manufacturer’s current datasheet.
Compare the hose’s working-pressure rating with the system’s maximum operating pressure, including relevant pressure surges. Do not use burst pressure as the allowable operating pressure. If the machine’s pressure profile is uncertain, ask the equipment designer or hydraulic specialist to confirm the design requirements before ordering.
Space: Check Outside Diameter and Bend Radius
“Compact” does not mean that 1SC and 2SC have identical dimensions. The two-braid construction of 2SC can require more space, but the amount depends on hose size and product design. Compare the outside diameter in the datasheets and check the fitting envelope, clamp position, nearby components, and room needed during assembly.
Also check the specified minimum bend radius for the selected bore. A route that forces the hose into a tighter curve than the manufacturer allows can put added stress on the assembly and shorten service life. Allow for movement and vibration where applicable, and avoid twisting the hose during installation.
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Which Hose Fits Your Application?
Choose 1SC When Pressure and Routing Allow
1SC may be appropriate for mobile machinery, compact equipment, and hydraulic lines where the product’s working-pressure rating covers the system and installation space is a priority. It can also be a practical choice where the existing hose specification calls for 1SC and the replacement must match the same bore, pressure class, and connection arrangement. Confirm fluid and temperature compatibility rather than assuming the construction alone makes the hose suitable.
Choose 2SC When the Pressure Requirement Calls for It
2SC is worth evaluating when the required pressure exceeds the available 1SC rating for the same bore, or when the equipment specification explicitly calls for a two-braid compact hose. It is not automatically the better option for every hydraulic line. If its outside diameter or minimum bend radius conflicts with the route, consider whether the design can be revised or whether another specified hose construction is more appropriate.
A Practical Selection Process for Buyers
- Record system conditions. Confirm maximum operating pressure, pressure peaks if known, fluid type, temperature range, and duty conditions.
- Confirm nominal bore. Use the equipment drawing or existing specification, and check that the selected size meets flow requirements. Do not reduce bore simply to make the line fit without engineering review.
- Measure the installation envelope. Record available clearance, route length, connection orientation, and the space around fittings and clamps.
- Compare current datasheets. For the exact 1SC or 2SC size, check working pressure, outside diameter, minimum bend radius, temperature limits, and fluid compatibility.
- Verify the complete assembly. Confirm that the hose and fittings are compatible and assembled to the supplier’s instructions. A hose-only selection does not establish the suitability of the complete assembly.
Common Selection Mistakes
- Choosing by braid count alone: A 2SC designation does not replace checking the rated working pressure for the required bore.
- Ignoring pressure peaks: Normal operating pressure may not represent the highest pressure the line experiences.
- Assuming 2SC will fit: Confirm outside diameter, bend radius, fitting dimensions, and routing clearance before finalizing a compact design.
- Substituting without checking the assembly: Verify the fitting type and assembly requirements when changing hose construction or supplier.
- Overlooking service conditions: Fluid, temperature, abrasion, movement, and exposure can affect material selection and service suitability.
Cost and Sourcing Considerations
Comparing unit prices alone can lead to an unsuitable purchase. A higher-rated hose may have a different material and dimensional profile, while a hose that does not fit the route may require design changes or a different assembly. Request a quotation using the same bore, length, pressure requirement, fittings, quantity, and delivery terms so offers can be compared on a consistent basis.
For a project or replacement program, provide the supplier with the required standard, hose designation, nominal bore, operating conditions, dimensions, fitting details, and any packaging or documentation requirements. Ask which product datasheet applies to the quotation and whether the proposed item meets the dimensions and ratings you specified. Lead time and minimum order quantity should be confirmed for the actual product and order quantity rather than assumed from the hose designation.
How We Support Hose Selection
At Hengshui Xinchi Hose Manufacturing Co., Ltd., we support B2B buyers sourcing rubber hydraulic hoses by reviewing the application details provided for a project. We can help compare 1SC and 2SC options against the requested bore, pressure, route dimensions, and fitting requirements, and provide product information for evaluation. Final suitability should be confirmed against the applicable product documentation and the equipment design requirements.
Conclusion: Select by Pressure First, Then Confirm Space
Choose EN 857 1SC when its verified, size-specific pressure rating covers the system and its dimensions suit the installation. Choose EN 857 2SC when the application requires its higher available pressure rating and the hose can be routed within its specified bend radius and clearance. Neither designation is the right choice based on braid count or compactness alone.
Your next step is to gather the required bore, maximum operating pressure, fluid and temperature conditions, route dimensions, and fitting details. Send these specifications to Hengshui Xinchi Hose Manufacturing Co., Ltd. to request a suitable product recommendation and quotation for your application.