Overview
EN ISO 21969:2009 (ISO 21969:2009) specifies requirements for high‑pressure flexible connections used with medical gas systems. It covers flexible connections intended to join cylinders or cylinder bundles (nominal filling pressures up to 25 000 kPa at 15 °C) to manifolds or to the inlet ports of medical equipment fitted with integral pressure regulators. Gases in scope include oxygen, nitrous oxide, breathing air, helium, carbon dioxide, xenon, gas mixtures, air and nitrogen for driving surgical tools, and oxygen‑enriched air. The standard excludes hoses used for filling cylinders and low‑pressure hose assemblies covered by ISO 5359.
Key topics and technical requirements
- Scope and gas list: Defines applicable medical gases and system uses (cylinders to manifolds; cylinders to equipment with regulators).
- Safety and risk management: Requires demonstration of acceptable risk reduction in normal and single‑fault conditions, referencing ISO 14971.
- Materials and construction: Specifies material suitability for contact with listed medical gases and permits alternative constructions if equivalent safety is demonstrated.
- Design and constructional requirements: Covers connectors, swivels, restraining means (e.g., cables, handles) and protection against torsion and mechanical damage.
- Testing: Requires type tests and other test methods to verify performance under expected pressures and conditions (see Clause 6).
- Marking, colour coding and packaging: Mandates identification, gas‑specific coding and packaging to minimize cross‑connection risks and support safe handling.
- Documentation: Specifies information manufacturers must supply (installation, maintenance, limitations).
- Normative references and rationale: Referenced standards (e.g., ISO 7396‑1, ISO 10524‑1) and Annex A provide rationales for selected requirements.
Applications and who uses this standard
EN ISO 21969:2009 is intended for:
- Medical gas equipment manufacturers (flexible connections, manifolds, cylinder bundles)
- Hospital biomedical engineers and facilities managers specifying or installing cylinder‑to‑manifold connections
- Medical gas suppliers and cylinder packagers
- Regulatory and compliance teams assessing conformity to EU medical device directives (see Annex ZA)
- Procurement specialists sourcing safe, gas‑specific high‑pressure hoses
Practical applications include connecting oxygen, nitrous oxide or instrument‑drive gas cylinders to pipeline manifolds, and linking cylinders to anaesthetic workstations or ventilators with integral regulators.
Related standards
Keywords: EN ISO 21969:2009, ISO 21969:2009, high‑pressure flexible connections, medical gas systems, cylinder manifold connections, medical gas safety.
