1.1 GeneralThis Standard specifies requirements for pressure regulators, pressure regulators with integral flow-metering devices and flow-metering devices which are intended to be connected to pressure regulators for the administration of medical gases.1.2 Medical gases This Standard covers the following common medical gases: (a) Air. (b) Carbon dioxide. (c) Helium. (d) Oxygen. (e) Nitrogen. (f) Nitrous oxide. (g) Xenon. (h) Mixtures of oxygen and carbon dioxide.(i) Mixtures of oxygen and helium.(j) Mixtures of oxygen and nitrogen.(k) Mixtures of oxygen and nitrous oxide.(l) Other gas mixtures to which pin index configurations have been assigned.NOTE: The list of medical gases shown is not exhaustive.