ISO 15002:2008 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.ISO 15002:2008 is applicable to: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;flow-metering devices intended to be used with the following gases:oxygen-enriched air;helium;xenon.