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UDC 621.595
IS0
STAN DARD IZAT I O N
I N T ERN AT 1 ON AL ORGANIZATION FOR
IS0 RECOMMENDATION
R 32
IDENTIFICATION OF MEDICAL GAS CYLINDERS
IS‘ EDITION
January 1957
COPYKIGHT KESEKL’ED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of ISO.
For each individual country the only valid standard is the national standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.
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lSO/R 32 - 1957 (E)
IS0 Recommendation R 32 January 1957
IDENTIFICATION OF MEDICAL GAS CYLINDERS
1. SCOPE
‘The present IS0 Kecommendation applies to tlie itleri tification of small
cylinders containing medical gases and fitled with valves of the flush type.
2. MARKING
Each cylinder should he marked with the nanie of lhe gas it contains, either
in tlie language of the country in which it is filled, or in lhe language preferred
or adopted in that country, and should he legibly marked yith the chernical
formula, except in the case of cyclopropane. ?’he marking should be at the
valve end of the cylinder and preferably away from the cylindrical part of
the body.
3. COLOUR MARKING
Each cylinder should hear a colour corresponding to the gas it contains,
as shown in the table below, and applied in such a manner thal the colour
is visible from the valve end.
In the case of gas mixtures, the cylinder should bear the appropriate colours
for the gases comprising the mixture, such colours to be visible from the
valve end.
Names of gases ~ Symbols ~ Colours
I
l l
O, 1 White
Oxygen
Blue
Nitrous oxyde
Orange
Cyclopropane
Grey
Carbon dioxyde
Violet
Ethylene
Brown
Helium
Black
Nitrogen
White and Grey
Oxygen and carbon dioxide
White and Brown
Oxygen and helium
White and Black
Air
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E
The identification colours should approximate as closely as possible to those
which are defined in the table below, on the
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