Overview
SIST EN 853:2026 establishes the specification for rubber hoses and hose assemblies with wire braid reinforcement, specifically designed for hydraulic applications. These hoses are essential for reliable hydraulic fluid transfer in industrial, mobile, and construction machinery. The standard defines requirements for four types of hoses - 1SN, 2SN, 1ST, and 2ST - covering nominal bores from 5 mm up to 76 mm. It outlines suitability with a range of fluids, including mineral hydraulic oils and water-based fluids, while excluding use with flame retardant HFD fluids, castor oil, and ester-based fluids.
This document specifies how to ensure performance and safety when manufacturing or selecting hydraulic hoses and assemblies, focusing on their construction, dimensions, and operational limits, but does not provide requirements for end fittings.
Key Topics
- Types of Hoses:
- 1SN and 2SN: Single and double wire braid hoses with thinner covers for specific fitting compatibility.
- 1ST and 2ST: Traditional single and double wire braid hoses.
- Fluid Compatibility:
- Compatible with most hydraulic fluids per ISO 6743-4 (excluding HFD fluids).
- Suitable for water-based fluids and water within defined temperature ranges.
- Performance Requirements:
- Hydrostatic, burst, and proof pressure ratings ensure safety in hydraulic systems.
- Minimum bend radius for flexibility in complex installations.
- Resistance to vacuum, fluid penetration, abrasion, ozone, and extreme temperatures.
- Endurance via impulse testing (up to 200,000 cycles for 2ST/2SN).
- Dimensional Specifications:
- Tight tolerances for inside/outside diameters, cover thickness, and concentricity.
- Marking requirements for traceability and identification.
- Testing and Quality Control:
- Type testing (initial design) and routine testing (every production lot) as per Annex A.
- Visual, dimensional, and performance verification required.
Applications
SIST EN 853:2026 wire braid reinforced hydraulic hoses are widely utilized in:
- Industrial Hydraulic Systems: Machinery automation, presses, and production equipment requiring durable and flexible hydraulic lines.
- Mobile Equipment: Construction, mining, and agricultural vehicles where hydraulic actuators and controls are critical.
- Maintenance and Repair: Replacement and custom hose assemblies for operational reliability in existing hydraulic installations.
- OEM Manufacturing: Sourcing consistent, standard-compliant hoses for new equipment production.
- Fluid Handling: Transfer and control of hydraulic fluids and water-based solutions in regulated temperature conditions.
The adherence to performance, pressure, and durability requirements ensures safety, efficiency, and extended service life of hydraulic circuits.
Related Standards
For comprehensive hydraulic system design and hose assembly specification, consider the following related standards:
- EN ISO 1402: Hydrostatic testing procedures for hoses and assemblies.
- EN ISO 4671: Methods for measuring hose dimensions and assembly lengths.
- EN ISO 6803: Hydraulic-pressure impulse testing of hoses.
- EN ISO 7233: Vacuum resistance assessment for hoses.
- EN ISO 7326: Ozone resistance testing.
- EN 857: Compact wire braid reinforced hoses for hydraulic applications.
- ISO 1817: Liquid resistance evaluation for rubber.
- ISO/TS 20444: Abrasion resistance testing methods.
These related standards support comprehensive quality assurance, system compatibility, and long-term functionality in demanding hydraulic applications.
Keywords: SIST EN 853:2026, wire braid hydraulic hoses, rubber hose assemblies, hydraulic hose specification, hydraulic system hoses, hydraulic fluids, ISO 6743-4, hose testing, industrial hoses, hose marking, pressure ratings, standard-compliant hoses.