scope:

1.1 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.
1.2 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.
1.3 This International Standard does not apply to electrical or electronic flow-metering devices.
1.4 This International Standard does not apply to gases used for driving surgical tools.