Overview
SIST EN 856:2026 specifies the requirements for four types of rubber-covered spiral wire reinforced hydraulic hoses and hose assemblies, suitable for nominal bores from 6 to 51 mm. Designed for hydraulic systems, these hoses are engineered to handle demanding environments and provide robust performance under high pressure. This standard applies to Types 4SP, 4SH, R13, and R15 hoses and covers their performance characteristics, construction, dimensional tolerances, and identification requirements.
These hydraulic hose types are intended for use with a range of hydraulic fluids as specified in ISO 6743-4 (excluding all flame-retardant HFD fluids), water-based fluids, and water. The temperature limits for the hose types are: −40 °C to +100 °C for 4SP and 4SH, and −40 °C to +120 °C for R13 and R15. The hoses are not suitable for use with castor oil-based or ester-based fluids.
This standard does not cover end fittings or hose assemblies for underground mining applications, focusing purely on the hose and assembly performance.
Key Topics
- Types of Hydraulic Hoses: Describes four specific hose types – 4SP, 4SH, R13, and R15 – defined by reinforcement, pressure rating, and temperature capabilities.
- Material and Construction: Specifies synthetic rubber linings and covers, with spiral steel wire reinforcement for strength and durability.
- Dimensional Requirements: Provides precise measurement criteria for internal diameter, wall thickness, concentricity, and overall hose dimensions.
- Performance Criteria: Outlines key test requirements including:
- Hydrostatic testing
- Minimum bend radius
- Flexibility at low temperatures (−40 °C)
- Impulse testing for durability
- Adhesion, abrasion, ozone, and fluid resistance
- Marking and Identification: Details mandatory markings for hoses and hose assemblies, including manufacturer, type, nominal bore, working pressure, and production date.
- Testing and Compliance: Defines frequency and methodology for type and routine tests according to industry-recognized standards (e.g., ISO 1402, ISO 6803, ISO 10619-2).
Applications
SIST EN 856:2026 is widely applicable across industries and environments where hydraulic power is essential. Key application areas include:
- Mobile and Industrial Hydraulics: Used in manufacturing lines, agricultural machinery, construction equipment, and mining vehicles.
- Heavy Equipment and Earth Moving: Offers reliability in demanding, high-pressure systems such as excavators and loaders.
- Hydraulic Presses and Machine Tools: Ensures safety and performance in hydraulic machinery.
- Marine and Offshore Operations: Suitable for marine cranes, deck winches, and offshore platforms, where high pressure and abrasion resistance are crucial.
- Water-based Hydraulic Systems: Provides compatibility for systems using approved fluids and operating under wide temperature ranges.
Using hoses compliant with EN 856:2026 ensures safety, standardized performance, and compatibility with global supply chains.
Related Standards
For comprehensive compliance and interoperability, the following related standards are referenced or work alongside SIST EN 856:2026:
- ISO 6743-4: Hydraulic fluid classifications
- EN ISO 1402: Hydrostatic testing of hoses and assemblies
- EN ISO 4671: Dimensional measurement methods for hoses
- EN ISO 6803: Hydraulic-pressure impulse test methods
- EN ISO 7326: Ozone resistance testing for hoses
- EN ISO 8033: Determination of adhesion between hose components
- ISO 1817: Fluid resistance testing for rubber materials
- ISO/TS 20444: Abrasion resistance of hose covers
Understanding and applying SIST EN 856:2026 together with its related standards ensures hydraulic systems meet global safety, reliability, and performance benchmarks. Always consult the latest standard texts and manufacturer recommendations for precise requirements.