scope:

This International Standard is applicable to:

- flow-metering devices which 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 measurement and delivery of medical gases;

- flow-metering devices which are connected and disconnected by the operator at gas-specific connection points of devices such as pressure regulators.

It applies only to flow-metering devices for the following medical gases:

- oxygen,

- nitrous oxide,

- air for breathing,

- carbon dioxide,

- helium,

- xenon,

- specified mixtures of the gases listed above,

- oxygen/nitrous oxide mixture 50/50 (% volume fraction).

This International Standard is not applicable to electrical or electronic flow-metering devices.