This International Standard specifies requirements for low-pressure hose assemblies intended for use with the following medical gases: ?? oxygen; ?? nitrous oxide; ?? medical air; ?? helium; ?? carbon dioxide; ?? xenon; ?? specified mixtures of the gases listed above; ?? oxygen-enriched air; ?? air for driving surgical tools; ?? nitrogen for driving surgical tools; ?? vacuum. It is intended in particular to ensure gas-specificity and to prevent cross-connection between systems conveying different gases. These hose assemblies are intended for use at maximum operating pressures of less than 1 400 kPa. This International Standard specifies t he allocation of ( NIST)@ ( DISS)@ (SIS) connectors t o medical gases and specifies the dimensions of non-interchangeable screw-threaded (NIST) connectors. This International Standard does not specify: ?? requirements for coaxial hoses used for the supply and disposal of air for driving surgical tools; ?? requirements for electrical conductivity. This International Standard does not specify the intended uses of hose assemblies. NOTE Some examples of intended use specified in other International Standards are as follows: a) between a terminal unit and medical equipment (ISO 9170-1@ IEC 60601-2-12@ IEC 60601-2-13); b) between the fixed pipeline system and a terminal unit of that system (ISO 7396-1@ ISO 11197); c) between a terminal unit and a second terminal unit (ISO 7396-1); d) between an emergency supply and an emergency and maintenance inlet point of a pipeline system (ISO 10524-1@ ISO 7396-1); e) between an emergency supply and medical equipment (ISO 10524-1@ I SO 10524-3@ IEC 60601-2-12@ IEC 60601-2-13).