ISO 2046:1973
(Main)Gaseous breathing oxygen supplies for aircraft
Gaseous breathing oxygen supplies for aircraft
Specified the pressure and characteristics and is applicable primarily to gas as supplied by manufacterer. Is also an acceptable standard which may be invokes in subsequent stages of distribution. The characteristics include purity, water, odour, flammability and toxity and solids.
Alimentation en oxygène respirable pour aéronefs
General Information
- Status
- Published
- Publication Date
- 30-Nov-1973
- Technical Committee
- ISO/TC 20/SC 10 - Aerospace fluid systems and components
- Drafting Committee
- ISO/TC 20/SC 10 - Aerospace fluid systems and components
- Current Stage
- 9020 - International Standard under periodical review
- Start Date
- 15-Oct-2025
- Completion Date
- 15-Oct-2025
Overview
ISO 2046:1973 - Gaseous breathing oxygen supplies for aircraft - specifies the pressure and quality characteristics required for gaseous oxygen intended for aircraft breathing systems. The standard applies primarily to oxygen as supplied by the manufacturer and can also be invoked at later stages of distribution. It defines measurable limits for purity, water, odour, flammability/toxicity, and solid particulates to ensure safety and compatibility with aircraft oxygen systems.
Key topics and technical requirements
The standard sets clear, testable requirements for aircraft-grade gaseous oxygen:
Purity
- Minimum oxygen content: 99.5% by volume.
- Remaining constituents limited to the other specified parameters (moisture, hydrocarbons, solids).
Pressure
- Oxygen must be supplied at a pressure sufficient to charge aircraft systems to their maximum working pressure.
- Typical aircraft system working pressures cited in the standard range from 31 to 207 bar.
Water (moisture) content
- Maximum water vapour: 5 mg/m³ measured at 15 °C and 1 013 mbar (760 mmHg).
- Exception: for certain operational conditions (infrequent system use or higher ambient temperatures) the aircraft cylinder output may permit up to 20 mg/m³.
Odour
- Gas shall be odourless by subjective test methods.
Flammability and toxicity
- Total hydrocarbon content ≤ 60 ppm by volume (measured at 15 °C and 1 013 mbar).
- Contaminants must not produce toxic effects in users.
Solids (particulates)
- No particles with dimensions > 100 µm.
- Total mass of solids ≤ 1 mg/m³ at 15 °C and 1 013 mbar.
Applications and who uses this standard
ISO 2046:1973 is practical for organizations involved in the production, supply, testing, and regulation of aircraft breathing oxygen:
- Oxygen manufacturers and gas suppliers - to certify product quality for aviation customers.
- Aircraft manufacturers and system designers - to ensure oxygen system compatibility and safety margins.
- Airlines and maintenance organizations (MROs) - for acceptance testing, replenishment, and in-service checks.
- Regulators and certification authorities - to reference uniform acceptance criteria for safe operation.
- Safety engineers and procurement teams - to specify requirements in contracts and safety management systems.
Related standards and guidance
For implementation, users should consult current national aviation regulations and contemporary ISO standards covering gas handling, cylinder filling, and aircraft system certification. ISO 2046:1973 remains a reference point for defining aircraft-grade gaseous oxygen quality and pressure requirements.
ISO 2046:1973 - Gaseous breathing oxygen supplies for aircraft
ISO 2046:1973 - Alimentation en oxygene respirable pour aéronefs
ISO 2046:1973 - Alimentation en oxygene respirable pour aéronefs
Frequently Asked Questions
ISO 2046:1973 is a standard published by the International Organization for Standardization (ISO). Its full title is "Gaseous breathing oxygen supplies for aircraft". This standard covers: Specified the pressure and characteristics and is applicable primarily to gas as supplied by manufacterer. Is also an acceptable standard which may be invokes in subsequent stages of distribution. The characteristics include purity, water, odour, flammability and toxity and solids.
Specified the pressure and characteristics and is applicable primarily to gas as supplied by manufacterer. Is also an acceptable standard which may be invokes in subsequent stages of distribution. The characteristics include purity, water, odour, flammability and toxity and solids.
ISO 2046:1973 is classified under the following ICS (International Classification for Standards) categories: 49.100 - Ground service and maintenance equipment. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 2046:1973 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
TERNATIONAL STANDARD
INTERNATIONAL ORGANlZATiON FOR STANDARDIZATION l MEXAYHAPOflHAfl OPTAHZII3ALWiII I-IO CTAHAAPTM3ALU4W~ORGANISATION INTERNATIONALE DE NORMALISATION
Gaseous breathing oxygen supplies for aircraft
First edition 1973-V-01
UDC 629.7.048.4
Ref. No. IS0 2046-1973 (E)
Descriptors : ai t-craft, oxygen, materials specifications, pressure.
Price based on 1 page
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 Member Bodies). The work of developing
International Standards is carried out through IS0 Technical Committees. Every
Member Body interested in a subject for which a Technical Committee has been set
up has the right to be represented on that Committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the IS0 Cou,ncil.
International Standard IS0 2046 was drawn up by Technical Committee
ISO/TC 20, Aircraft and space vehicles, and circulated to the Member Bodies in
October 1970.
It has been approved by the Member Bodies of the following countries :
Austria
Israel Thailand
Belgium
Italy Turkey
Canada Netherlands United Kingdom
Czechoslovakia New Zealand U.S.S. R.
Egypt, Arab Rep. of South Africa, Rep. of
India Spain
The Member Bodies of the fol lowing countries expressed disapproval of the
document on technica I grounds :
France
Germany
U.S.A.
0 International Organization for Standardization, 1973 l
Printed in Switzerland
IS0 20464973 (E)
INTERNATIONAL STANDARD
Gaseous breathing oxygen supplies for aircraft
I SCOPE AND FIELD OF APPLICA
...
NORME INTERNATIONALE
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXflYHAPOQHAR OPI-AHM3AWf~ l-I0 CTAHAAPTM3AUHM *ORGANISATION INTERNATIONALE DE NORMALISATION
Alimentation en oxygène respirable pour.aéronefs
Première édition - 1973 -12-01
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.
LL
Réf. No : ISO 2046-1973 (F)
Y CDU 629.7.048.4
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Descripteurs : aéronef, oxygène, spécification de matière, pression.
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Prix bas’é sur 1 page
AVANT-PROPOS
ISO (Organisation Internationale de Normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (Comités Membres ISO). L’élaboration de
Normes Internationales est confiée aux Comités Techniques ISO. Chaque Comité
Membre interessé par une étude a le droit de faire partie du Comité Technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les Projets de Normes Internationales adoptés par les Comités Techniques sont
soumis aux Comités Membres pour approbation, avant leur acceptation comme
Normes Internationales par le Conseil de I’ISO.
La Norme Internationale ISO 2046 a été établie par le Comité Technique
ISOiTC 20, Aéronautique et espace, et soumise aux Comités Membres en
octobre 1970.
Elle a été approuvée par les Comités Membres des pays suivants :
Afrique du Sud, Rép. d’ I nde
Tchécoslovaquie
Autriche Israël Tha’ilande
Belgique Italie Turquie
Canada Nouvel le-Zélande U. R.S.S.
Egypte, Rep. arabe d’ Pays-Bas
Espagne Royaume-Uni
Les Comités Membres des pays suivants ont desapprouvé le document pour des
raisons techniques :
Allemagne
France
U.S.A.
0 Organisation Internationale de Normalisation, 1973 l
Imprim,é en Suisse
ISO2046-1973(F)
NORME INTERNATIONALE
Alimentation en oxygène respirable pour aéronefs
1 OBJET ET DOlMAiNE D’APPLICATION ’ 3.2 Eau
La teneur en eau de l’oxygène ne doit pas dépasser
...
NORME INTERNATIONALE
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXflYHAPOQHAR OPI-AHM3AWf~ l-I0 CTAHAAPTM3AUHM *ORGANISATION INTERNATIONALE DE NORMALISATION
Alimentation en oxygène respirable pour.aéronefs
Première édition - 1973 -12-01
.-
.
LL
Réf. No : ISO 2046-1973 (F)
Y CDU 629.7.048.4
M
r-
0,
Y
Descripteurs : aéronef, oxygène, spécification de matière, pression.
CO
d
E
Prix bas’é sur 1 page
AVANT-PROPOS
ISO (Organisation Internationale de Normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (Comités Membres ISO). L’élaboration de
Normes Internationales est confiée aux Comités Techniques ISO. Chaque Comité
Membre interessé par une étude a le droit de faire partie du Comité Technique
correspondant. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO, participent également aux travaux.
Les Projets de Normes Internationales adoptés par les Comités Techniques sont
soumis aux Comités Membres pour approbation, avant leur acceptation comme
Normes Internationales par le Conseil de I’ISO.
La Norme Internationale ISO 2046 a été établie par le Comité Technique
ISOiTC 20, Aéronautique et espace, et soumise aux Comités Membres en
octobre 1970.
Elle a été approuvée par les Comités Membres des pays suivants :
Afrique du Sud, Rép. d’ I nde
Tchécoslovaquie
Autriche Israël Tha’ilande
Belgique Italie Turquie
Canada Nouvel le-Zélande U. R.S.S.
Egypte, Rep. arabe d’ Pays-Bas
Espagne Royaume-Uni
Les Comités Membres des pays suivants ont desapprouvé le document pour des
raisons techniques :
Allemagne
France
U.S.A.
0 Organisation Internationale de Normalisation, 1973 l
Imprim,é en Suisse
ISO2046-1973(F)
NORME INTERNATIONALE
Alimentation en oxygène respirable pour aéronefs
1 OBJET ET DOlMAiNE D’APPLICATION ’ 3.2 Eau
La teneur en eau de l’oxygène ne doit pas dépasser
...
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