Overview
ISO 6605:2017 - Hydraulic fluid power - Test methods for hoses and hose assemblies - specifies uniform, practical test methods for evaluating the performance of hoses and hose assemblies (hose plus attached fittings) used in hydraulic fluid power systems. The standard defines how to perform visual inspection and a suite of standard tests (dimensional checks, proof, change-in-length, burst, cold bend, cyclic endurance/impulse, leakage and adhesion) and references acceptance criteria as given in the relevant product specifications.
Important safety note: several tests are hazardous (burst, high-pressure jets, energy release). Tests must be performed by trained personnel and air should be bled from specimens before pressure testing.
Key Topics and Requirements
- Scope and intent: Provides uniform test procedures for hydraulic hoses and hose assemblies; final pass/fail criteria are determined by the applicable product specification.
- Visual examination: Inspect hose assemblies per ISO/TS 17165-2 to confirm correct hose and fittings installation.
- Dimensional checks: Measure outside/reinforcement diameters (by circumference or tape), inside diameter (expanding ball or telescoping gauge), and concentricity. Typical measurement distances from hose ends are specified (e.g., outside/inside diameters at ≥25 mm; concentricity at ≥15 mm).
- Proof test: Hydrostatic test per ISO 1402 at a proof pressure equal to twice the maximum working pressure (unless otherwise specified); assemblies showing no leakage pass.
- Change-in-length test: Measure elongation/contraction after pressurization using defined reference marks and formula referenced to ISO 1402.
- Burst test: Destructive hydrostatic test to failure; minimum burst pressure is four times the maximum working pressure, unless specified otherwise. Note: fittings should have been attached for less than 30 days for tested samples.
- Cyclic endurance (impulse) test: Fatigue testing between lower and upper cyclic pressures to assess long-term performance under pressure cycling.
- Other tests: Cold bend, leakage and adhesion tests with defined procedures and reporting methods.
Applications and Who Uses It
ISO 6605:2017 is used by:
- Hose and hose-assembly manufacturers for product development and quality control
- Independent test laboratories and certification bodies performing hydrostatic and fatigue testing
- OEMs and system integrators specifying hydraulic hose performance in equipment
- Procurement and quality managers who enforce test requirements in contracts
- Maintenance engineers evaluating hose assembly replacement and failure analysis
Keywords: ISO 6605:2017, hydraulic fluid power, hose test methods, hose assemblies, proof test, burst test, cyclic endurance, hydrostatic testing.
Related Standards
Key normative references and related documents include: