Rubber hoses and hose assemblies - Textile reinforced hydraulic type - Specification; German version EN 854:2015
1Key Takeaways
This European Standard specifies requirements for three types of textile reinforced rubber hoses and hose assemblies of nominal bore from 5 to 100. The types are defined in Clause 3. They are suitable for use with: — hydraulic fluids in accordance with ISO 6743-4 with the exception of HRD R, HFD S and HFD at temperatur…
2Expert Interpretation
An in-depth interpretation of the DIN EN 854:2016-09 technical standard for textile-reinforced hydraulic rubber hoses, covering the dimensional requirements, pressure performance, test methods, and quality control specifications for the three types of hoses: 1TE, 2TE, and 3TE. This professional technical guide is suitable for hydraulic systems, water-based fluids, and water-based media applications.
EN 854 Standard Overview and Technical Evolution
DIN EN 854:2016-09 is the technical specification for textile-reinforced hydraulic rubber hoses and hose assemblies, published by the European Committee for Standardization (CEN). This standard replaces the 1997 version and has been comprehensively revised in terms of technical content and editorial format. This standard applies to three types of textile-reinforced rubber hoses with a nominal inner diameter of 5 to 100 mm, primarily used in hydraulic oil, water-based fluid, and water delivery systems.
Main technical changes in the standard
Compared with the 1997 edition, EN 854:2016-09 has made the following important technical updates:
| Change items | 1997 edition | 2016 edition | Technical significance |
|---|---|---|---|
| Hose type | Include R6 and R3 types | Delete R6 and R3 types | Optimize product series and focus on mainstream models |
| Inner diameter tolerance | Old tolerance system | Update inner diameter tolerance requirements | Improve dimensional accuracy requirements |
| Abrasion resistance test | Based on ISO 6945 | Modify the test method | Adapt to the standard update and improve test accuracy |
| Appendix structure | Basic Appendix | New normative appendixes A and B and informative appendix C | Improve test methods and quality control system |
Hose classification and structural requirements
The standard specifies three types of textile reinforced hydraulic hoses:
1TE hose
Single-layer textile reinforced structure, suitable for low-pressure applications, with a maximum working pressure range of 16-25 bar, and no pulse test and vacuum resistance test are required.
2TE hose
One or more layers of textile braid reinforcement, medium pressure rating, maximum working pressure range 10-80 bar, required to pass 100,000 impulse tests.
3TE hose
One or more layers of textile braid reinforcement, high pressure application type, maximum working pressure range 10-160 bar, required to pass 200,000 impulse tests.
All types of hoses must include an oil- and water-resistant synthetic rubber liner, one or more layers of textile yarn reinforcement, and an oil- and weather-resistant synthetic rubber outer layer.
Dimensions and Tolerances
| Nominal Inside Diameter (mm) | Inner Diameter Tolerance (mm) | Concentricity Requirement (mm) | Minimum Bending Radius (mm) |
|---|---|---|---|
| 5 | 4.9-5.2 | ≤0.8 | 35-40 |
| 10 | 9.5-10.0 | ≤1.0 | 60-75 |
| 25 | 25.4-26.2 | ≤1.0 | 150 |
| 100 | 99.4-101.4 | ≤1.3 | 600 |
Hose length tolerance is ±2% of the specified length. Hose assembly length tolerance has different requirements based on nominal inside diameter and length range.
Performance Requirements and Test Methods
Hydraulic Performance Requirements
Hose and hose assemblies are required to meet maximum working pressure, proof pressure, and burst pressure requirements when subjected to hydrostatic testing according to EN ISO 1402. 2TE hoses are required to withstand 125,000 pulse cycles, while 3TE hoses are required to withstand 200,000 pulse cycles.
Environmental Adaptability
Hoses must pass a -40°C low-temperature flexibility test, an abrasion test (mass loss no more than 1g), a fluid resistance test (volume expansion rate ≤25% for the inner lining and ≤100% for the outer layer), and an ozone resistance test.
Vacuum Resistance
2TE and 3TE hoses must meet varying degrees of vacuum resistance, up to a negative pressure of -0.8 bar.
Quality Control and Testing Requirements
| Test Items | Type Test | Routine Test | Production Acceptance Test |
|---|---|---|---|
| Dimensional Measurement | ✓ | ✓ | ✓ |
| Verification Pressure Test | ✓ | ✓ | ✓ |
| Burst Test | ✓ | ✗ | Every 3000 meters |
| Pulse Test | ✓ | ✗ | Yearly |
| Fluid Resistance Test | ✓ | ✗ | Yearly |
Marking and Identification Requirements
Hoses must be marked with the following information every 500mm: manufacturer's logo, standard number EN 854, type (e.g., 1TE), nominal inside diameter, and year and quarter of production. Hose assemblies must be marked with the assembler's logo, maximum working pressure (bar), and year and month of assembly.
Example marking:XXX/EN 854/1TE/16/1Q15 indicates a 16mm hose, type 1TE, produced by XXX company and in accordance with EN 854 standard, and produced in the first quarter of 2015.
Application Limitations and Precautions
EN 854 standard clearly stipulates the use restrictions of hoses:
- Not suitable for castor oil-based and ester-based fluids
- Operating temperature range: hydraulic oil -40°C to 100°C, water-based fluid -40°C to 70°C, water 0°C to 70°C
- Hydraulic hoses for underground mining have separate standards and specifications
- It is strictly forbidden to use them beyond the working limits specified in the standard
Implementation Recommendations and Best Practices
Based on the technical requirements of EN 854 standard, users and manufacturers are recommended to adopt the following implementation strategies:
- Selection Guide:Select the appropriate hose type according to the working pressure and ambient temperature. Type 1TE is suitable for low pressure occasions and type 3TE is suitable for high pressure and high temperature environments
- Installation specifications: Strictly adhere to the minimum bending radius requirements to avoid excessive bending of the hose, which may lead to performance degradation
- Maintenance plan: Establish a regular inspection and testing system, especially pulse testing and fluid compatibility verification
- Quality control: Manufacturers should strictly implement the test frequency and requirements specified in Annexes B and C
- Technical training: Train operating and maintenance personnel on standard requirements to ensure correct use and maintenance
Through the full implementation of the EN 854 standard requirements, the safety, reliability and service life of textile reinforced hydraulic rubber hoses in various industrial applications can be ensured.