Overview
EN ISO 14246:2022 - Gas cylinders: Cylinder valves - Manufacturing tests and examinations defines the procedures and acceptance criteria for manufacturing (initial) tests and examinations of cylinder valves designed and type‑tested to ISO 10297. Published by CEN/ISO, it applies to cylinder valves for refillable transportable gas cylinders, main valves (excluding ball valves) for cylinder bundles, valves with integrated pressure regulators (VIPR), and valves for pressure drums and tubes. The standard is intended to ensure valves leave production clean, safe and fit for their intended service.
Key topics and technical requirements
- Scope & applicability: Applies to valves type‑tested per ISO 10297; principles can be applied to valves tested to other national/international standards.
- Cleanliness: Gas‑wetted components for oxygen and oxidizing gases must be oil/grease free with a maximum hydrocarbon contamination level (specified as 220 mg/m) and no particles larger than 200 µm; ISO 15001 is referenced as an example method for verification.
- Valve test pressure (p_vt): Test pressures are specified by gas class. Examples from the standard:
- Fluorine - 160 bar
- Oxygen difluoride / Nitric oxide - 180 bar
- All other compressed gases - 1.2 × valve working pressure (p_w)
- Liquefied or dissolved gases - at least equal to the minimum test pressure of the pressure receptacle for that gas (special rules for acetylene)
- Note: pressures are gauge pressures (bar).
- Manufacturing tests and examinations:
- Tests to be performed on each valve (e.g., leak tightness, functional tests).
- Sample inspections and verification of batch documentation (sampling plans like ISO 2859 are referenced).
- Materials and component verification, including assembly correctness and torque checks.
- All measuring instruments must be calibrated and results recorded.
- Documentation: Test records, batch records and verification procedures are required for traceability and conformity.
Applications and users
This standard is essential for:
- Cylinder valve manufacturers and production quality teams - to set up factory inspection and testing regimes.
- Testing laboratories and quality auditors - to verify manufacturing acceptance criteria and test methods.
- Cylinder and gas suppliers - ensuring valves supplied on cylinders meet safety and service requirements.
- Regulatory and conformity assessment bodies - referencing EN ISO 14246:2022 for compliance with transport and safety rules.
Related standards
- ISO 10297 - Valve specification and type testing (primary design/type test reference)
- ISO 15001 - Example methods for oxygen cleanliness verification (medical applications)
- ISO 10286 - Vocabulary for gas cylinders
- ISO 2859 series - Sampling procedures (inspection)
Keywords: EN ISO 14246:2022, gas cylinders, cylinder valves, manufacturing tests, ISO 10297, valve test pressure, cleanliness, VIPR, batch inspection, CEN.