Overview
EN ISO 1402:2021 - Rubber and plastics hoses and hose assemblies - Hydrostatic testing specifies standardized methods for hydrostatic testing of rubber and plastic hoses and hose assemblies, including procedures to determine dimensional stability. Published by CEN/ISO in 2021, this standard updates prior editions and defines how to prepare, pressurize, inspect and report hydrostatic test results for quality, safety and compliance purposes.
Key topics and technical requirements
- Scope: Methods for hydrostatic testing and dimensional stability assessment of rubber and plastics hoses and hose assemblies.
- Test environment: Tests are performed at standard temperature in accordance with ISO 23529 (conditioning and preparation).
- Test media: Water or another liquid suitable for the hose under test. Use of gases is discouraged because of safety risks; if used, strict safety measures are required.
- Test pieces:
- Hose assemblies: use the manufactured assembly length.
- Hoses: minimum free length of 600 mm (when measuring deformation) or 300 mm (when not), unless otherwise specified.
- Number of test pieces: at least two.
- Apparatus:
- Pressure source capable of the specified rate of pressure increase.
- Calibrated pressure gauge or transducer with digital readout (select range so test pressure is 15–85% of full scale).
- Dimensional equipment (vernier calipers, micrometre, length tape, π tape).
- Pressure application:
- Fill test piece, expel all air, allow free movement of ends, then apply pressure at a uniform rate.
- Rate to reach final pressure: 30–60 s for nominal inside diameters ≤ 50 mm; 60–240 s for >50 mm and ≤250 mm; longer hoses or larger diameters: agreed between manufacturer and user.
- Hydrostatic tests covered:
- Proof pressure hold test (inspect for leakage, cracking, distortions; hold typically 30–60 s; pressure tolerance +10%).
- Measurement of deformation under pressure (change in length, external diameter, twisting, warping).
- Burst pressure and leakage tests.
- Reporting: Test report requirements are specified (see Clause 9).
Applications and who uses this standard
- Manufacturers of rubber and plastic hoses and hose assemblies - for product validation, batch acceptance and design verification.
- Test laboratories and quality-control teams - to perform consistent hydrostatic and dimensional-stability testing.
- Specifiers, purchasers and certification bodies - to verify compliance with product standards and safety requirements.
- R&D and engineering teams - to evaluate material or design changes under hydrostatic load.
Related standards
- ISO 7751 (ratios of proof and burst pressure to maximum working pressure)
- ISO 8330 (vocabulary for hoses and hose assemblies)
- ISO 23529 (preparing and conditioning test pieces)
Keywords: EN ISO 1402:2021, hydrostatic testing, rubber and plastics hoses, hose assemblies, dimensional stability, proof pressure, burst pressure, test procedure.