EN ISO 4080:1995

SLOVENSKI STANDARD
SIST EN ISO 4080:2000
01-december-2000
*XPHQHLQSROLPHUQHFHYLWHUFHYQLSULNOMXþNL8JRWDYOMDQMHSUHSXVWQRVWL]DSOLQH
,62
Rubber and plastics hoses and hose assemblies - Determination of permeability to gas
(ISO 4080:1991)
Gummi- und Kunststoffschläuche und -schlauchleitungen - Bestimmung der
Gasdurchlässigkeit (ISO 4080:1991)
Tuyaux et flexibles en caoutchouc et en plastique - Détermination de la perméabilité au
gaz (ISO 4080:1991)
Ta slovenski standard je istoveten z: EN ISO 4080:1995
ICS:
83.140.40 Gumene cevi Hoses
SIST EN ISO 4080:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4080:2000

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SIST EN ISO 4080:2000

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SIST EN ISO 4080:2000

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SIST EN ISO 4080:2000
INTERNATIONAL
STANDARD 4080
Third edition
1991-11-15
Rubber and plastics hoses and hose
assemblies - Determination of permeability to
WS
Tuyaux et flexibles en caoutchouc et en plastique - DHermination de la
perm6abilite au gaz
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-.-
-^ --
Reference number
--
~~_-.---- - ISO 4080: 199.1 (E)

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SIST EN ISO 4080:2000
ISO 4080:1991(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide
federation of national Standards bodies (ISO member bodies). The work
of preparing International Standards is normally carried out through ISO
technical committees. Esch member body interested in a subject for
which a technical committee has been estabiished has the right to be
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Drall International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard ISO 4080 was prepared by Technical Committee
ISO/TC 45, Rubber and rubber products, Sub-Committee SC 1, Woses
(rubber and plastics).
This third edition cancels and replaces the second edition
(ISO 4080:1987), which has been technically revised to include an ad-
ditional method (method 3).
0 ISO 1991
All rights reserved. No part of this publication may he reproduced or utilized in any form
or by any means, electronie or mechanical, including photocopying and microfilm, without
Permission in writing from the publisher.
ardization
International Orga nization for Stand
Case Postale 56 l CH-121 1 Geneve 20 l Switzerland
Printed in Switzerland
ii

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SIST EN ISO 4080:2000
---
ISO 4080:1991 (E)
INTERNATIONAL STANDARD
Rubber and plastics hoses and hose assemblies -
Determination of permeability to gas
ISO 471:1983, Rubber - Standard temperatures, hu-
1 Scope
midities and firnes for the conditioning and testing
of test pieces.
This International Standard specifies three methods
for the determination of the volume of gas diffusing
through the wall of a rubber or plastics hose in a
3 Apparatus
specified period.
Method 1: For determining the permeability of
3.1 Water bath, capable of being maintained at a
the complete hose Wall, excluding end-fittings, to
specified temperature and of sufficient length to ac-
the test gas. This method is used when evaluat-
commodate the test piece.
ing gas permeability characteristics of hoses
with pricked covers.
3.2 Gas supply, provided with a suitable pressure
Method 2: For determining the permeability of
gauge and emergency excess flow shutoff valves in
the hose inner lining and the reinforcement to
case of hose failure.
the test gas. This method is used when deter-
mining the permeability characteristics of hoses
with an unpricked cover when the gas usually
3.3 Gas-collecting apparatus, comprising measur-
issues from the textile reinforcement at the tut
ing cylinders and in some instances additional ap-
ends.
paratus appropriate to each of the three methods,
and as illustrated in figures 1 to 3 respectively. The
Method 3: For determining precisely the per-
capacity and accuracy of the measuring cylinders
meability of the wall of a hose during a specified
shall be selected in accordance with the volume of
period of time to the test gas.
gas that is expected to be collected.
The methods are applicable only to test gases which
are insoluble in water.
3.4 Barometer, to record the barometric pressure
during the test.
3.5 Two thermometers, to record water and air
temperatures at the gas-collection Point.
Schematic layouts of the test arrangements for the
2 Normative reference
three test methods are shown in figures 1 to 3.
The following Standard contains provisions which,
through reference in this text, constitute provisions
4 Test pieces
of this International Standard. At the time of publi-
cation, the edition indicated was valid. All Standards
and Parties to agreements
are subject to revision,
4.1 Method 1
based on this International Standard are encour-
aged to investigate the possibility of applying the
The test piece shall be a suitable piece of hose long
most recent edition of the Standard indicated below.
enough to ensure that the length of exposed hose
Members of IEC and ISO maintain registers of cur-
under the gas-collecting trough is 1 m.
rently valid International Standards.

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SIST EN ISO 4080:2000
ISO 4080:1991(E)
supply (3.2) and blank off the tail coupling. Purge the
4.2 Method 2
assembly with gas to expel any air before finally
sealing the test assembly.
The test piece shail be a free length of hose 1 m
long.
Apply the test pressure to the assembly for 24 h and
then immerse the test assembly and its end con-
4.3 Method 3
nections in the water bath (3.1) (see figure 2).
The test piece shall have a 0,5 m length of hose be-
Collect and measure any escapi
...