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.

NOTE Regional or national regulations might permit use of oxygen-specific connection points for oxygen-enriched air.

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.