scope:

* 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 the allocation of (NIST), (DISS), (SIS) connectors to 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:

between a terminal unit and medical equipment (ISO 9170-1, IEC 60601-2-12^[7], IEC 60601-2-13^[8]);

between the fixed pipeline system and a terminal unit of that system (ISO 7396-1^[10], ISO 11197^[13]);

between a terminal unit and a second terminal unit (ISO 7396-1);

between an emergency supply and an emergency and maintenance inlet point of a pipeline system (ISO 10524-1^[12], ISO 7396-1);

between an emergency supply and medical equipment (ISO 10524-1, ISO 10524-3^[16], IEC 60601-2-12, IEC 60601-2-13).