EN 857 1SC vs 2SC: Choosing Compact Hose by Pressure and Space

Choose EN 857 1SC when its size-specific working-pressure rating meets your system requirement and its routing advantages suit the installation. Choose EN 857 2SC when the application needs a higher rated working pressure and there is enough room to accommodate its typically heavier, less flexible construction. Neither designation alone tells you the allowable pressure for every hose size: compare the exact bore, pressure rating, minimum bend radius, temperature range, and fitting assembly data before ordering.

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In practical terms, 1SC has one steel-wire braid reinforcement layer, while 2SC has two. For example, commonly published product tables list DN10 (3/8 in) 1SC at 180 bar and DN10 2SC at 330 bar; treat these as examples, not universal ratings, and confirm the selected manufacturer’s datasheet. This guide explains how to compare pressure and space without choosing a hose based on its name alone.

What the 1SC and 2SC Comparison Covers

EN 857 is a European specification for compact hydraulic hose types. The “SC” designation is associated with compact construction, while “1” and “2” distinguish the number of steel-wire braid reinforcement layers. The construction difference affects pressure capability and can also affect hose dimensions and handling, but the product’s published specification is what determines its usable limits.

This comparison is for engineers, maintenance teams, OEMs, and hose buyers evaluating a compact hydraulic line. It is most useful when a design is close to its pressure limit, has tight routing, or needs replacement hose matched to an existing assembly. It is not a substitute for checking the complete circuit design or the assembly manufacturer’s instructions.

Quick Difference Summary

Pressure: Compare the Rating for the Exact Hose Size

Working pressure is tied to nominal bore and product construction, so do not compare 1SC and 2SC by type name alone. A commonly published example for DN10 (3/8 in) is 180 bar for 1SC versus 330 bar for 2SC. Ratings can vary by size and product; use the current technical data for the exact hose being quoted, not an example value from another size or supplier.

Check the maximum pressure expected in service, including pressure peaks where the system design specifies them. The selected hose and assembled fittings must be suitable for the application as a complete assembly. Do not treat the hose’s burst rating as an operating pressure, and do not increase system pressure simply because a hose has a higher rating.

How to Make a Pressure-Based Decision

1. Identify the bore. Record the required nominal diameter and confirm that it matches the system flow and connection requirements.
2. Establish the pressure duty. Use the equipment or circuit specification to identify the required working pressure and any relevant pressure transients.
3. Compare datasheets. Check the working-pressure rating for both hose types at the same bore, and verify that the selected hose and fittings are rated for the application.
4. Keep design margins intact. If the pressure requirement is near a published limit, request a technical review rather than relying on a rounded or assumed value.

A common EN 857 hose specification may state a temperature range of -40°C to +100°C, but the exact permitted range depends on the hose product, fluid, and operating conditions. Confirm the selected manufacturer’s temperature and fluid-compatibility information. Pressure capability alone does not establish suitability for a particular hydraulic fluid or environment.

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Space and Routing: Check More Than the Bend Radius

Installation space includes the hose’s outside diameter, the available clearance around it, the fitting envelope, and the route between connection points. A two-braid hose may be heavier or less flexible than a comparable one-braid option, but actual dimensions and handling vary by product and bore. Ask for the relevant product data instead of assuming that every 1SC hose is smaller than every 2SC hose.

Minimum bend radius is especially important in compact machinery. Bending below the manufacturer’s specified limit can damage a hose or reduce service life, so measure the intended route and compare it with the datasheet for the chosen size. Also check whether the hose can be installed without twisting, rubbing against nearby components, or placing unwanted load on the fittings.

When Space Should Influence the Choice

In a tight equipment bay, 1SC may be worth evaluating first if its pressure rating and other specifications satisfy the design. If the required pressure leads to 2SC, confirm that the route allows its specified bend radius and clearance. Where neither option fits the route safely, review the design or evaluate another approved hose arrangement rather than forcing a tighter bend.

Cost, Replacement, and Sourcing Considerations

A higher-rated hose is not automatically the better purchase if the application does not need its pressure capability and its dimensions complicate installation. Conversely, selecting 1SC solely to reduce bulk is not appropriate if its published rating does not cover the duty. Compare the cost of the hose assembly alongside compatibility, installation effort, replacement availability, and the risk of a mismatch.

For replacement work, record the hose marking, bore, length, fitting type, and application conditions before requesting a quotation. Similar-looking hoses are not necessarily interchangeable, and an existing installation does not prove that its current hose is correctly specified. For new projects, share the pressure requirement and routing constraints together so a supplier can assess the complete selection rather than quote on type alone.

Common Selection Mistakes to Avoid

• Choosing by braid count alone: Reinforcement type helps describe construction, but the published working-pressure rating for the exact product and size is decisive.
• Ignoring assembly components: Confirm that fittings and assembly instructions are suitable for the selected hose; do not assume hose compatibility means fitting compatibility.
• Using a generic bend-radius figure: Check the value for the selected bore and product, then assess the actual installed route.
• Overlooking fluid and temperature: Verify the hose’s compatibility with the hydraulic fluid and the application’s temperature conditions.
• Substituting without review: Before replacing 1SC with 2SC or the reverse, compare pressure, dimensions, fittings, and installation requirements.

Key Takeaways

• EN 857 1SC uses one steel-wire braid layer; EN 857 2SC uses two.
• 2SC commonly offers a higher working-pressure rating, but ratings depend on bore and product.
• 1SC can be a candidate for tighter routing when its pressure rating and specified bend radius suit the installation.
• Compare exact datasheets for pressure, outside diameter, minimum bend radius, fluid compatibility, temperature, and fittings.

Final Recommendation

For a compact, lower-pressure application, evaluate EN 857 1SC first if its size-specific rating and installation limits meet the design requirements. For higher-pressure duty, evaluate 2SC and confirm that its dimensions and bend-radius requirements fit the available space. If the required pressure and route appear incompatible, pause the selection and request a technical review rather than compromising either limit.

Hengshui Xinchi Hose Manufacturing Co., Ltd. can support B2B buyers comparing compact hydraulic hose options. When requesting a quotation or technical review, provide the hose type under consideration, nominal bore, required working pressure, fluid, temperature range, routing space, hose length, and fitting details. This information helps us assess the requirement and confirm the applicable product data before you proceed with sourcing.

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