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ISO 11242:1996

(Main)

Aircraft — Pressure equalization requirements for cargo containers

Aircraft — Pressure equalization requirements for cargo containers

Describes the minimum safety requirements to be met by containers used to transport cargo by civil transport aircraft under normal pressure equalization during climb and descent and under emergency pressure equalization in the event of a sudden depressurization.

Aéronefs — Exigences d'égalisation de pression pour les conteneurs de fret

General Information

Status
Published
Publication Date
12-Jun-1996
ICS
55.180.30 - Air mode containers, pallets and nets
Technical Committee
ISO/TC 20/SC 9 - Air cargo and ground equipment
Drafting Committee
ISO/TC 20/SC 9 - Air cargo and ground equipment
Current Stage
9020 - International Standard under periodical review
Start Date
15-Apr-2024
Completion Date
15-Apr-2024
Ref Project

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ISO 11242:1996 - Aircraft -- Pressure equalization requirements for cargo containersISO 11242:1996 - Aircraft -- Pressure equalization requirements for cargo containers
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ISO 11242:1996 - Aircraft -- Pressure equalization requirements for cargo containers
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ISO 11242:1996 - Aéronefs -- Exigences d'égalisation de pression pour les conteneurs de fretISO 11242:1996 - Aéronefs -- Exigences d'égalisation de pression pour les conteneurs de fret
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ISO 11242:1996 - Aéronefs -- Exigences d'égalisation de pression pour les conteneurs de fret
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Standards Content (Sample)

INTERNATIONAL
IS0
STANDARD
11242
First edition
1996-06-01
Aircraft - Pressure equalization
requirements for cargo containers
Abronefs - Exigences d’6galisation de pression pour les conteneurs de
fret
Reference number
IS0 11242:1996(E)

---------------------- Page: 1 ----------------------
a
IS0 11242:1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established 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. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 11242 was prepared by Technical Committee
lSO/TC 20, Aircraft and space vehicles, Subcommittee SC 9, Air cargo
and ground equipment.
Annexes A, B and C of this International Standard are for information only.
0 IS0 1996
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopyrng and
mrcrofilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56.CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland

---------------------- Page: 2 ----------------------
Q IS0
IS0 11242:1996(E)
Introduction
The decrease in ambient pressure with altitude creates a pressure differ-
ential between the inside of a cargo container and the outside environ-
ment. When the internal volume and/or area of a container are significant,
this may, if not properly controlled, result in tremendous forces exerted
on the container panels, thus becoming a major flight safety hazard. Inci-
dents were recorded during flight in which overly airtight containers broke
down or nearly exploded during climb.
In order to avoid such potentially hazardous situations, it is essential that
this problem be clearly identified and taken into account when designing
any type of container to be moved regularly or occasionally by air cargo.
. . .
III

---------------------- Page: 3 ----------------------
This page intentionally left blank

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD 0 IS0 IS0 11242:1996(E)
Aircraft - Pressure equalization requirements for
cargo containers
l IS0 8323 for air/surface intermodal containers,
1 Scope
l IS0 10327 for certified containers for air cargo;
Since most modern civil transport aircraft capable of
- air mode insulated containers, as covered by
carrying air cargo unit load devices or large-size
IS0 8058;
shipping containers have pressurized cabins and cargo
compartments, two different cases must be con-
- any airtight shipping containers with an internal
sidered:
volume of 1 m3 35 ft3 or more.
( 1
a) normal (low airflow) pressure equalization during
NOTE 1 Most shipping containers/packagings used for
climb and descent - from the departure airport
air cargo are made of sufficiently low-strength material (e.g.
pressure down to the cruise flight cabin pressure,
fibreboard) or provide sufficient air leakage (e.g. wooden
up to the landing airport pressure;
crates) that they cannot be considered airtight and do not
present any significant hazard as a result of pressure
b) emergency (rapid decompression) pressure
equalization.
equalization in the event of a sudden (possibly
There are however a number of special containers, notably
“explosive”) depressurization of the aircraft
for the carriage of satellites/space hardware, aircraft spares,
fuselage occurring at cruise altitude: this case re-
sensitive scientific or technical equipment, etc., which are
quires very fast (high airflow) pressure equaliz-
airtight per design (in order to protect the contents against
ation between cruise flight cabin pressure and
atmospheric pollution) or per construction (because of the
outer ambient pressure.
quality of sealing and materials used).
This International Standard defines the minimum
safety requirements to be met by containers used to
2 Normative references
transport cargo by civil transport aircraft in either case
a) or b) above.
The following standards contain provisions which,
through reference in this text, constitute provisions
The flight safety requirements specified in this Inter-
of this International Standard. At the time of publica-
...

NORME
ISO
INTERNATIONALE
11242
Première édition
1996-06-01
Aéronefs - Exigences d’égalisation de
pression pour les conteneurs de fret
Aircraft - Pressure equaliza tien requiremen ts for cargo containers
Numéro de référence
ISO 11242:1996(F)

---------------------- Page: 1 ----------------------
ISO 11242:1996(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération
mondiale d’organismes nationaux de normalisation (comités membres de
I’ISO). L’élaboration des Normes internationales est en général confiée aux
comités techniques de I’ISO. Chaque comité membre intéressé par une
étude a le droit de faire partie du comité technique créé à cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent également aux travaux. L’ISO colla-
bore étroitement avec la Commission électrotechnique internationale (CEI)
en ce qui concerne la normalisation électrotechnique.
Les projets de Normes internationales adoptés par les comités techniques
sont soumis aux comités membres pour vote. Leur publication comme
Normes internationales requiert l’approbation de 75 % au moins des co-
mités membres votants.
La Norme internationale ISO 11242 a été élaborée par le comité technique
lSO/TC 20, Aéronautique et espace, sous-comité SC 9, Chargement et
équipement au sol.
Les annexes et C de la présente Norme internationale sont données
A, B
I
uniq uement à titre td information.
0 ISO 1996
Droits de reproduction réservés. Sauf prescription différente, aucune partie de cette publi-
cation ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun pro-
cédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l’accord
écrit de l’éditeur.
Organisation internationale de normalisation
Case Postale 56 l CH-l 211 Genève 20 l Suisse
Imprimé en Suisse
ii

---------------------- Page: 2 ----------------------
0 ISO
ISO 11242:1996(F)
Introduction
La baisse de pression ambiante avec l’altitude crée un différentiel de
pression entre l’intérieur d’un conteneur de fret et l’environnement exté-
rieur. Lorsque le volume intérieur et/ou l’aire du conteneur sont impor-
tants, cela peut, si ce n’est pas correctement contrôlé, provoquer des
forces considérables exercées sur les panneaux du conteneur, qui devient
ainsi un risque majeur pour la sécurité du vol. Des incidents ont été enre-
gistrés en vol avec des conteneurs trop hermétiques subissant une avarie,
ou étant sur le point d’exploser lors de l’ascension.
Afin d’éviter de telles situations potentiellement dangereuses, il est es-
sentiel que ce problème soit clairement cerné et pris en compte lors de
la conception de tout type de conteneur destiné à être transporté régu-
lièrement ou occasionnellement par fret aérien.

---------------------- Page: 3 ----------------------
Page blanche

---------------------- Page: 4 ----------------------
NORME INTERNATIONALE 0 BO
[SO 11242:1996(F)
Aéronefs - Exigences d’égalisation de pression pour
les conteneurs de fret
l I’ISO 6517 pour les conteneurs certifiés à re-
1 Domaine d’application
tenue par la base pour le pont inférieur des
aéronefs à grande capacité exclusivement,
La plupart des aéronefs civils capables de transporter
des unités de charge ou des conteneurs d’expédition
l I’ISO 8323 pour les conteneurs airlsurface
de grande taille étant équipés de cabines et de soutes
(intermodaux),
pressurisées, deux cas différents sont à considérer:
l I’ISO 10327 pour les conteneurs certifiés pour
a) l’égalisation normale de la pression (faible débit
le fret aérien;
d’air) pendant la montée et la descente (de la
pression de l’aéroport de départ en descendant à
- des conteneurs isothermes pour transport aérien,
la pression de la cabine en vol de croisière, puis
couverts par I’ISO 8058;
remontant à la pression de l’aéroport d’atterris-
sage);
- de tous les conteneurs d’expédition hermétiques
d’un volume intérieur supérieur ou égal à 1 m3
b) l’égalisation d’urgence de la pression (décom-
35 ft3 .
pression rapide) dans le cas d’une dépressuri- ( 1
sation soudaine (éventuellement ((explosive))) du
NOTE 1 La plupart des conteneurs ou emballages d’ex-
fuselage de l’aéronef, survenant à une altitude de
pédition utilisés pour le fret aérien sont réalisés dans un
croisière: cette éventualité exige une égalisation
matériau de résistance suffisamment peu élevée (carton par
de pression très rapide (débit d’air élevé) entre la exemple) ou assurent une fuite d’air suffisante (caisses à
claire-voie par exemple) pour qu’ils ne puissent être consi-
pression de la cabine en vol et la pression exté-
dérés comme hermétiques et ne présentent pas de risque
rieure ambiante.
important résultant de l’égalisation de pression.
II existe toutefois un nombre de conteneurs spéciaux, par-
La présente Norme internationale définit les exi-
ticulièrement pour le tr
...

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