scope:

This International Standard is applicable to: flow-metering devices that are connected, either directly or by means of flexible connecting assemblies, and disconnected by the operator at terminal units of a medical gas pipeline system for flow adjustment, measurement and delivery of medical gases; flow-metering devices that are connected and disconnected by the operator at gas-specific connection points of devices such as pressure regulators. This International Standard applies to: a) flow-metering devices intended to be used with the following medical gases: oxygen; nitrous oxide; medical air; carbon dioxide; oxygen/nitrous oxide mixture [50 %/50 % (by volume)]; specified mixtures of the gases listed above; b) flow-metering devices intended to be used with the following gases: oxygen-enriched air; helium; xenon. This International Standard does not apply to electrical or electronic flow-metering devices. This International Standard does not apply to gases used for driving surgical tools.