EN ISO 8031:2020 specifies electrical test methods for rubber and plastics hoses, tubing and hose assemblies to determine electrical resistance, conductivity and the electrical continuity or discontinuity of hose assemblies. The standard covers conductive, antistatic and non‑conductive constructions and includes methods suitable for hoses with a conducting lining, conducting cover or conducting compound throughout. All test methods described for rubber hoses are applicable to plastics hoses as well.
Key topics and technical requirements
- Scope of tests: Measurement of resistance of conductive, antistatic and non‑conductive hoses; measurement of electrical continuity or discontinuity between metal end fittings; resistance through the hose wall; and resistance of linings/covers in contact with metal fittings.
- Test apparatus & instruments: Instruments conforming to ISO 2878 are referenced. Preferred insulation-resistance instruments have a nominal open‑circuit voltage of 500 V d.c., accuracy approximately ±10%, and tests must limit power dissipation in the specimen (not more than 3 W) to avoid heating effects.
- Methods by construction: Separate procedures are defined for hoses with a conducting lining, conducting cover or conducting compounds throughout, and for hose lengths up to or beyond specified lengths.
- Preparation & conditioning: Requirements for cleaning, conditioning and specimen preparation are included to ensure reproducible, comparable results.
- Field and factory testing: Practical methods for in‑field verification (including continuity tests that do not require exact resistance measurement) are provided for acceptance and routine checks.
- Reporting: The standard defines content for the test report and includes informative Annex A recommending terminology and limits for electrical conductivity and resistance.
Practical applications and users
Who uses EN ISO 8031:2020:
- Hose and hose‑assembly manufacturers for product verification and quality control
- Test laboratories and inspection bodies performing acceptance testing
- Product engineers and procurement teams specifying electrical properties for hoses used where static charge or conductivity is critical
- Maintenance and field technicians performing on‑site continuity or conductivity checks
Typical applications:
- Hoses used in environments where static discharge is a hazard (e.g., fuel transfer, handling of flammable liquids, explosive atmospheres)
- Industrial and mobile hydraulic systems where conductive/antistatic behaviour is required
- Any application demanding documented electrical continuity between metallic fittings
Related standards
- ISO 2878 - Determination of electrical resistance for antistatic and conductive rubber products
- ISO 8330 - Vocabulary for rubber and plastics hoses and hose assemblies
Keywords: EN ISO 8031:2020, ISO 8031, electrical resistance testing, conductivity, rubber hoses, plastics hoses, hose assemblies, antistatic, conductive, electrical continuity, hose testing.
