scope:

This International Standard specifies requirements for low-pressure hose assemblies intended for use with the following medical gases:

- oxygen;

- nitrous oxide;

- air for breathing;

- helium;

- carbon dioxide;

- xenon;

- specified mixtures of the gases listed above;

- air for driving surgical tools; nitrogen for driving surgical tools;

- nitric oxide/nitrogen mixtures;

- 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 to be used at pressures less than 1 400 kPa.

This International Standard specifies the allocation of non-interchangeable screw-threaded (NIST) connectors and diameter-index safety system (DISS) connectors to medical gases and specifies the dimensions of non-interchangeable screw-threaded (NIST) connectors.¹⁾

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, ISO 8835-1, ISO 10651-1);

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, ISO 7396-1);

e) between an emergency supply and medical equipment (ISO 10524, ISO 8835-1, ISO 10651-1).

1) Details and dimensions of DISS connectors can be obtained from the Compressed Gas Association Inc., 1725 Jefferson Davies Highway, Arlington, VA 22202, USA.