Overview
EN ISO 14245:2021/A1:2025 - Gas cylinders - Specifications and testing of LPG cylinder valves - Self-closing (Amendment 1) - is a CEN-adopted amendment to ISO 14245:2021 that updates technical requirements and test methods for self-closing valves used on LPG (liquefied petroleum gas) cylinders. The amendment clarifies connection standards, material and assembly compatibility, test pressures and leak criteria, mechanical tests (impact, vibration, endurance) and documentation/marking requirements. It also adds a normative reference to MIL‑STD‑810G:2008 for environmental testing considerations.
Key topics and technical requirements
- Scope extension and normative references: Adds MIL‑STD‑810G:2008 as a normative reference for environmental/laboratory tests.
- Materials & adhesives: Where adhesives are used they must be proven compatible with LPG according to recognized standards (regional/national/international).
- Valve connections: Valve inlet and outlet connections shall conform to established standards or be proprietary designs qualified to acceptable industry procedures (examples: ISO 11363‑1, ISO 15245‑1, ISO 5145, EN 15202, ISO 10692‑2, CGA V‑1).
- Threaded joints and sealants: Anaerobic sealants may be used on internal threaded joints if proven compatible with LPG (references such as EN 751‑1 noted).
- Assembly security: Requirements added to ensure dip tubes, sediment tubes and liquid level gauges are securely fitted to prevent disassembly (adhesive, press fit or mechanical means).
- Test updates:
- Revised leak tightness limits: external and internal leak rate shall not exceed 15 cm³/h of air (corrected to specified conditions) at specified pressures/temperatures.
- Minimum test pressures and sealing element pressures updated (e.g., sealing element ≥ 30 bar, test pressure minimum 45 bar for certain tests).
- Impact test energies clarified: valves intended to be used only with protection caps are tested at minimum 40 J; unprotected valves require impact energy = 3.6 × gross mass (kg) ±5%.
- Strength, endurance, vibration and other functional tests revised and cross‑referenced to renumbered tables/annexes.
- Configuration change testing: Changes to valve design or materials require additional inspections/tests per the updated tables; guidance provided for which tests to repeat.
- Marking and documentation: Valves must be permanently and legibly marked before entering service (forging, stamping, laser etching, etc. - adhesive labels insufficient).
Practical applications
- Use this amendment when designing, manufacturing, testing or certifying self‑closing LPG cylinder valves.
- Helps test laboratories determine updated test pressures, leak criteria and mechanical test parameters.
- Supports procurement and regulatory compliance by giving manufacturers and authorities a clear set of acceptance tests for valve configuration changes and optional components (e.g., excess flow valves, non‑return valves, eduction tubes).
Who should use this standard
- LPG cylinder valve manufacturers and designers
- Component and accessory suppliers (dip tubes, gauges, seals)
- Test houses, conformity assessment bodies and notified bodies
- Cylinder fabricators, LPG equipment installers and safety regulators
- Procurement/specification writers for LPG systems
Related standards (examples referenced)
Keywords: EN ISO 14245:2021/A1:2025, LPG cylinder valves, self‑closing valve testing, valve specifications, leak tightness, impact test, valve connections, valve marking, LPG safety standards.
