Overview
ISO 14246:2022 - Gas cylinders - Cylinder valves - Manufacturing tests and examinations specifies procedures and acceptance criteria for manufacturing (initial) tests and examinations of cylinder valves type tested to ISO 10297. It applies to:
- cylinder valves for refillable transportable gas cylinders,
- main valves (excluding ball valves) for cylinder bundles,
- valves with integrated pressure regulators (VIPR),
- valves for pressure drums and tubes.
The standard defines how to verify valve function, cleanliness, materials and batch conformity so valves perform safely in service and meet transport and regulatory requirements.
Key topics and requirements
- Manufacturing tests on each valve
- Internal and external leak tightness testing prior to dispatch.
- Verification of through passage and testing at ambient temperature (typically 15–30 °C).
- Valves closed with manufacturer-specified closing torque (not exceeding type-test endurance torque).
- Typical acceptance limits: internal leakage ≤ 6 cm3/h; total external leakage ≤ 6 cm3/h for cylinder/main valves and ≤ 12 cm3/h for VIPR. Alternative tighter limits can be agreed for toxic or specialty gases.
- Valve test pressure
- Table-driven test pressures (e.g., specific high-pressure gases such as fluorine; most compressed gases tested at 1.2 × valve working pressure pw). Special provisions for liquefied and dissolved gases (e.g., acetylene - minimum 35 bar in certain cases).
- Cleanliness
- Controls to ensure valves are supplied clean and dry for intended service. For oxygen and oxidizing gases, hydrocarbon contamination limits and particle-size limits (e.g., maximum hydrocarbon mass and particle size thresholds) are specified, with ISO 15001 cited as an example method for verification.
- Sampling, inspections and batch verification
- Sampling plans (e.g., ISO 2859 procedures) for inspections of dimensions, machining, assembly torques, marking, documentation, and material certificates.
- Quality and materials control
- Requirement for a quality management system covering suppliers, components and test laboratories to ensure correct materials and components are used.
Applications and who uses this standard
ISO 14246:2022 is used by:
- valve and cylinder manufacturers for production control and release testing,
- quality managers and production engineers implementing manufacturing test protocols,
- independent test laboratories and conformity assessors performing leak and pressure testing,
- transport safety regulators and compliance teams ensuring valves meet UN Model Regulations references,
- purchasers and end-users of cylinders who specify manufacturing acceptance criteria (industrial gases, medical, specialty and oxidizing gases).
Practical benefits include reduced in-service failures, documented batch traceability, and alignment with type testing in ISO 10297.
Related standards
- ISO 10297 - Cylinder valves: specification and type testing
- ISO 10286 - Gas cylinders vocabulary
- ISO 15001 - Oxygen cleanliness (example method)
- ISO 10156 - Oxidizing gas considerations
- ISO 2859 - Sampling procedures
- UN Model Regulations - Transport conformity references
Keywords: ISO 14246:2022, gas cylinders, cylinder valves, manufacturing tests, valve test pressure, leak tightness, VIPR, ISO 10297, cleanliness, batch testing, quality management.
