NEN EN 13220 : 1998

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Terminology
5 General requirements
6 Test methods
7 Marking, colour coding, packaging
8 Information to be supplied by the manufacturer
Annex A (informative) Typical examples of flow-metering systems
Annex B (informative) Bibliography
Annex C (informative) Rationale
Annex D (normative) Special national conditions
Annex ZA (informative) Clauses of this European Standard addressing
                       essential requirements or other provisions
                       of EU Directives

Defines flow-metering devices which are connected and disconnected by the operator at terminal units of a medical gas pipeline system for measurement and delivery of medical gases, they can be connected either directly or by means of flexible connecting assemblies. Applicable only to flow-metering devices for the following medical gases; nitrous oxide, oxygen, carbon dioxide, air for breathing, xenon, helium, oxygen/nitrous oxide mixture (50% / 50% V/V), specified mixtures of the gases listed above. Excluded are electrical or electronic flow-metering devices.