Overview
EN ISO 15995:2021 - "Gas cylinders - Specifications and testing of LPG cylinder valves - Manually operated" is a CEN-adopted international standard that defines design, specification, type testing, production testing and inspection requirements for dedicated manually operated LPG cylinder valves used on transportable refillable LPG cylinders. The standard also covers associated equipment for vapour and liquid service, while explicitly excluding bursting discs/fusible plugs, fixed automotive installation valves and ball valves. Annex B addresses production testing and inspection requirements.
Key topics and technical requirements
The document organizes technical requirements and tests that ensure safety, reliability and compatibility of LPG cylinder valves. Major topics include:
- Design and specification
- General design rules, essential and optional components (valve body, stem, outlet, excess flow devices, pressure relief valves, eduction tubes, liquid level indicators, sealing caps, sediment tubes).
- Material selection and operating temperature considerations, including metallic and non‑metallic component guidance.
- Performance and safety requirements
- Leak tightness (external and internal), operating, opening and closing torque limits.
- Requirements for excess flow valves and non‑return valves where applicable.
- Type testing
- Hydraulic pressure tests, valve stem tests, hand‑wheel fire exposure tests, impact tests, excessive opening/closing torque tests, endurance (cycling) tests.
- Examination of dismantled valves and inspection criteria after testing.
- Production testing and inspection
- Annex B identifies mandatory production checks and inspection steps to maintain conformity in manufacturing.
Practical applications and who uses this standard
EN ISO 15995:2021 is used to ensure safe operation and regulatory compliance of manually operated LPG cylinder valves across the supply chain. Typical users include:
- LPG cylinder valve manufacturers - for design validation, type approval and production quality control.
- Test laboratories and certification bodies - to perform type tests and verify conformity to EN ISO 15995:2021.
- LPG equipment designers and OEMs - for specifying compatible valve features and associated equipment (vapour/liquid service).
- Regulatory authorities and safety inspectors - to assess compliance, installation safety and marketplace surveillance.
- Service centers and cylinder refillers - to understand valve characteristics, torque limits and replacement criteria.
Related standards
Keywords: EN ISO 15995:2021, LPG cylinder valves, gas cylinders, valve testing, production testing, leak tightness, excess flow valve, valve design, CEN.
