EN ISO 4589-2:1999
(Main)Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test (ISO 4589-2:1996)
Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-temperature test (ISO 4589-2:1996)
Kunststoffe - Bestimmung des Brandverhaltens durch den Sauerstoff-Index - Teil 2: Bestimmung des Sauerstoff-Index (OI) bei Umgebungstemperatur (ISO 4589-2:1996)
In diesem Teil von ISO 4589 werden Verfahren zur Bestimmung der minimalen Sauerstoffkonzentration in Gemischen mit Stickstoff, die die Verbrennung senkrecht angeordneter kleiner Probekörper unter festgelegten Prüfbedingungen unterstützen, festlegt. Die Ergebnisse sind als Sauerstoff-Index-Werte festgelegt.
Plastiques - Détermination du comportement au feu au moyen de l'indice d'oxygène - Partie 2: Essai à la température ambiante (ISO 4589-2:1996)
Polimerni materiali - Določanje gorljivosti s kisikovim indeksom - 2. del: Preskus pri sobni temperaturi (ISO 4589-2:1996)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2000
3ROLPHUQLPDWHULDOL'RORþDQMHJRUOMLYRVWLVNLVLNRYLPLQGHNVRPGHO 3UHVNXV
SULVREQLWHPSHUDWXUL ,62
Plastics - Determination of burning behaviour by oxygen index - Part 2: Ambient-
temperature test (ISO 4589-2:1996)
Kunststoffe - Bestimmung des Brandverhaltens durch den Sauerstoff-Index - Teil 2:
Bestimmung des Sauerstoff-Index (OI) bei Umgebungstemperatur (ISO 4589-2:1996)
Plastiques - Détermination du comportement au feu au moyen de l'indice d'oxygene -
Partie 2: Essai a la température ambiante (ISO 4589-2:1996)
Ta slovenski standard je istoveten z: EN ISO 4589-2:1999
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL IS0
STANDARD
4589-2
First edition
1996-07-I 5
Plastics - Determination of burning
behaviour by oxygen index - .
Part 2:
Ambient-temperature test
P/as tiques - D&termination du comportement au feu au moyen de
I ‘indice d ‘oxygkne -
Partie 2: Essai 6 la temperature ambiante
IS0 4589-2: 1996
Contents
Page
1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4 Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6 Calibration of equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7 Preparation of test specimens
8 Procedure for determination of oxygen index . . . . . . . . . . . . . . . . . . . . . . . . . .
9 Calculations and expression of results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 Procedure C - Comparison with a specified minimum value of the
oxygen index (short procedure) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 Test report
Annexes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
A Calibration of equipment
Calculation of oxygen concentration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B
Typical test results sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C
D Results obtained by interlaboratory trials on type VI specimens
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 photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
0 IS0 IS0 4589-2: 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
(IEC) 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 4589-2 was prepared by Technical Committee
ISO/TC 61, Plastics, Subcommittee SC 4, Burning behaviour.
Together with parts 1 and 3 (see below), this part of IS0 4589 cancels and
replaces IS0 4589: 1984.
This revision has been prepared to introduce the following changes rela-
tive to the 1984 edition:
to amplify the requirements for equipment calibration (see clause 6
a)
and annex A);
to reduce the permissible deviations for the gas flow rate through the
b)
chimney at 40 mm/s from + IO mm/s to ~fr 2 mm/s;
to introduce a relatively short procedure, as procedure C, intended for
d
use for comparison purposes, to determine whether or not the oxygen
index of a material lies above a specified minimum value;
to introduce a new specimen (form VI) and a corresponding procedure
d
for testing of thin films. Precision data for the new procedure are given
in an informative annex.
IS0 4589 consists of the following parts, under the general title
P/as tics - Determination of burning behaviour by oxygen index:
- Part 7: Guidance
- Part 2: Ambient-temperature test
- Part 3: Elevated-temperature test
Annexes A and B form an integral part of this part of IS0 4589. Annexes
C and D are for information only.
This page intentionally left blank
INTERNATIONAL STANDARD 0 IS0 IS0 4589-2: 1996(E)
Plastics - Determination of burning behaviour by
oxygen index -
Part 2:
Ambient-temperature test
correlation with flammability behaviour under other
1 Scope
fire conditions is implied.
Results obtained in accordance with this part of
This part of IS0 4589 specifies methods for deter-
IS0 4589-2 must not be used to describe or appraise
mining the minimum concentration of oxygen, in ad-
the fire hazard presented by a particular material or
mixture with nitrogen, that will support combustion
shape under actual fire conditions, unless used as one
of small vertical test specimens under specified test
element of a fire risk assessment that takes into ac-
conditions. The results are defined as oxygen index
count all of the factors pertinent to the assessment
values.
of the fire hazard of a particular application for the
material.
Methods are provided for testing materials that are
NOTES
self-supporting in the form of vertical bars or sheet
up to IO,5 mm thick. These methods are suitable for
1 It may not be possible to apply these methods satisfac-
solid, laminated or cellular materials characterized by
torily to materials that exhibit high levels of shrinkage when
an apparent density greater than 100 kg/m3. The
heated, e.g. highly oriented thin film.
methods may also be applicable to some cellular ma-
terials having an apparent density of less than
2 For assessing the flame propagation properties of cellu-
100 kg/m3. A method is provided for testing flexible lar materials of density < 100 kg/m3, attention is drawn to
the method of IS0 3582:1978, Cellular plastic and cellular
sheet or film materials while supported vertically.
rubber materials - Laboratory assessment of horizontal
burning characteristics of small specimens subjected to a
For comparative purposes, a procedure is provided for
small flame, for testing horizontal burning characteristics.
determining whether or not the oxygen index of a
material lies above some specified minimum value.
Oxygen index results obtained using the methods 2 Normative references
described in this part of IS0 4589 can provide a sen-
sitive measure of the burning characteristics of ma- The following standards contain provisions which,
through reference in this text, constitute provisions
terials under certain controlled laboratory conditions,
of this part of IS0 4589. At the time of publication, the
and hence may be useful for quality control purposes.
editions indicated were valid. All standards are subject
The results obtained are dependent upon the shape,
to revision, and parties to agreements based on this
orientation and isolation of the test specimen and the
conditions of ignition. For particular materials or appli- part of IS0 4589 are encouraged to investigate the
possibility of applying the most recent editions of the
cations, it may be necessary or appropriate to specify
standards indicated below. Members of IEC and IS0
different test conditions. Results obtained from test
maintain registers of currently valid International
specimens of differing thickness or by using different
Standards.
ignition procedures may not be comparable and no
IS0 4589-2: 1996(E)
IS0 293: 1986, Plastics - Compression moulding test
5 Apparatus
specimens of thermoplastic materials.
5.1 Test chimney, consisting of a heat-resistant
IS0 294: 1995, Plastics - Injection moulding of test
glass tube supported vertically on a base through
specimens of thermoplastic materials.
which oxygen-containing gas mixtures can be intro-
duced (see figures 1 and 2).
IS0 295:1991, Plastics - Compression moulding of
test specimens of thermose tting materials.
The preferred dimensions of the chimney are
450 mm minimum height and 95 mm minimum di-
IS0 2818:1994, Plastics - Preparation of test speci-
ameter.
mens by machining.
The upper outlet shall be restricted as necessary by
IS0 2859-l : 1989, Sampling procedures for inspection
an overhead cap having an outlet small enough to
by attributes - Part 7: Sampling plans indexed by
produce an exhaust velocity of at least 90 mm/s from
acceptable quality level (AQL) for lot-by-lot
that outlet.
inspection.
NOTE 3 A cap converging to an outlet of 40 mm diam-
I SO 2859-2: 1985, Sampling procedures for inspection
eter at a level at least 10 mm above the top of the cylindrical
by attributes - Part 2: Sampling plans indexed by
chimney has been found satisfactory.
limiting quality (LC?) for isolated lot inspection.
Chimneys of other dimensions, with or without re-
- Multipurpose test speci-
IS0 3167:1993, Plastics
stricted outlets, may be used, if shown to give equiv-
mens.
alent results. The bottom of the chimney, or the base
upon which the chimney is supported, shall incorpo-
rate a device for distributing evenly the gas mixture
3 Definition entering the chimney. The preferred device comprises
a suitable diffuser and a mixing chamber with metal
For the purposes of this part of IS0 4589, the follow-
foil. Other devices, such as radial manifolds, may be
ing definition applies.
used, if shown to give equivalent results. A porous
screen may be mounted below the level of the spec-
3.1 oxygen index: The minimum concentration of
imen holder,. to prevent falling combustion debris
oxygen, by volume percentage, in a mixture of oxygen
from fouling the gas entry and distribution paths.
and nitrogen introduced at 23 “C zf~ 2 “C that will just
The chimney support may incorporate a levelling de-
support combustion of a material under specified test
vice and indicator, to facilitate vertical alignment of the
conditions.
chimney and a test specimen supported therein. A
dark background may be provided to facilitate obser-
vation of flames within the chimney.
4 Principle
A small test specimen is supported vertically in a
5.2 Test specimen holder, suitable for supporting
mixture of oxygen and nitrogen flowing upwards
a specimen vertically in the centre of the chimney.
through a transparent chimney. The upper end of the
For self-supporting materials, the specimen shall be
specimen is ignited and the subsequent burning be-
held by a small clamp which is at least 15 mm away
haviour of the specimen is observed to compare the
period for which burning continues, or the length of from the nearest point at which the specimen may
specimen burnt, with specified limits for such burning. burn before the extent-of-burning criterion is ex-
ceeded. For supported film or sheet test specimens,
By testing a series of specimens in different oxygen
the specimen shall be supported by both vertical
concentrations, the minimum oxygen concentration is
edges in a frame equivalent to that illustrated by fig-
estimated (see 8.6).
ure2, with reference marks at 20 mm and 100 mm
Alternatively, for comparison with a specified mini-
below the top of the frame.
mum oxygen index value, three test specimens are
tested using the relevant oxygen concentration, at The profile of the holder and its support should pref-
least two of which are required to extinguish before erably be smooth to minimize induction of turbulence
any relevant burning criterion is exceeded. in the rising flow gas.
IS0 4589-2: 1996(E)
Dimensions in millimetres
Chimney
r (height 450 mm,
diameter 95 mm)
Outlet, @ 40 mm
,-- Test specimen
Chimney cap
- Specimen holder
Glass chimney
Suitable device for restricting
chimney outlet (see 5.1)
Wire-mesh
debris screen
/-
Oxygen/nitroge
mixture
y Igniter
e
- Diffuser ring
Alternative gas flow measuring
devices (see note S to 5.4)
4 Pressure gauge 7 Needle valve
1 Gas premixing point
pressure regulator 8 Gas flow meter
2 Cut-off valve 5 Preci
...
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