SIST EN ISO 11925-2:2011
(Main)Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2010)
Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2010)
This part of ISO 11925 specifies a method of test for determining the ignitability of products by direct small flame impingement under zero impressed irradiance using vertically oriented test specimens. Information on the precision of the test method is given in Annex A.
Prüfungen zum Brandverhalten von Baustoffen - Entzündbarkeit von Bauprodukten bei direkter Flammeneinwirkung - Teil 2: Einflammtest (ISO 11925-2:2010)
Diese Europäische Norm legt ein Prüfverfahren fest, um die Entzündbarkeit von Bauprodukten, die in vertikaler
Anordnung geprüft werden, mit Hilfe einer direkt einwirkenden kleinen Flamme ohne zusätzliche
Wärmebestrahlung zu ermitteln.
Bauprodukte, die sich der Flamme durch Schmelzen und Schrumpfen entziehen, ohne dabei entzündet zu
werden, dürfen dem Zusatzprüfverfahren nach Anhang A unterzogen werden.
Hinweise zur Messunsicherheit des Prüfverfahrens sind Anhang B zu entnehmen.
Essais de réaction au feu - Allumabilité des produits de bâtiment soumis à l'incidence directe de la flamme - Partie 2: Essai à l'aide d'une source à flamme unique (ISO 11925-2:2010)
L'ISO 11925-2:2010 spécifie une méthode d'essai permettant de déterminer l'allumabilité des produits par incidence directe d'une petite flamme sous éclairement énergétique nul, en utilisant des éprouvettes en position verticale.
Preskusi odziva na ogenj - Sposobnost vžiga gradbenih proizvodov v neposrednem stiku s plamenom - 2. del: Preskus z enim gorilnikom (ISO 11925-2:2010)
Ta del ISO 11925 določa metodo preskusa za določanje sposobnosti vžiga proizvodov pri neposrednem stiku z majhnim plamenom in pri ničnih sledeh žarenja z uporabo navpično obrnjenih vzorcev. Informacije o natančnosti preskusne metode so podane v dodatku A.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 11925-2:2011
01-marec-2011
1DGRPHãþD
SIST EN ISO 11925-2:2002
SIST ISO 11925-2:1998
SIST ISO 11925-2:1998/Cor.1:1999
Preskusi odziva na ogenj - Sposobnost vžiga gradbenih proizvodov v
neposrednem stiku s plamenom - 2. del: Preskus z enim gorilnikom (ISO 11925-
2:2010)
Reaction to fire tests - Ignitability of building products subjected to direct impingement of
flame - Part 2: Single-flame source test (ISO 11925-2:2010)
Prüfungen zum Brandverhalten von Baustoffen - Entzündbarkeit von Bauprodukten bei
direkter Flammeneinwirkung - Teil 2: Einflammtest (ISO 11925-2:2010)
Essais de réaction au feu - Allumabilité des produits de bâtiment soumis à l'incidence
directe de la flamme - Partie 2: Essai à l'aide d'une source à flamme unique (ISO 11925-
2:2010)
Ta slovenski standard je istoveten z: EN ISO 11925-2:2010
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
SIST EN ISO 11925-2:2011 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
SIST EN ISO 11925-2:2011
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SIST EN ISO 11925-2:2011
EUROPEAN STANDARD
EN ISO 11925-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2010
ICS 13.220.50 Supersedes EN ISO 11925-2:2002
English Version
Reaction to fire tests - Ignitability of products subjected to direct
impingement of flame - Part 2: Single-flame source test (ISO
11925-2:2010)
Essais de réaction au feu - Allumabilité de produits soumis Prüfungen zum Brandverhalten - Entzündbarkeit von
à l'incidence directe de la flamme - Partie 2: Essai à l'aide Produkten bei direkter Flammeneinwirkung - Teil 2: Einzel-
d'une source à flamme unique (ISO 11925-2:2010) Flammentest (ISO 11925-2:2010)
This European Standard was approved by CEN on 2 October 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11925-2:2010: E
worldwide for CEN national Members.
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SIST EN ISO 11925-2:2011
EN ISO 11925-2:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 11925-2:2011
EN ISO 11925-2:2010 (E)
Foreword
This document (EN ISO 11925-2:2010) has been prepared by Technical Committee ISO/TC 92 "Fire safety" in
collaboration with Technical Committee CEN/TC 127 “Fire safety in buildings” the secretariat of which is held
by BSI.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by May 2011, and conflicting national standards shall be withdrawn at the
latest by May 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11925-2:2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11925-2:2010 has been approved by CEN as a EN ISO 11925-2:2010 without any
modification.
3
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SIST EN ISO 11925-2:2011
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SIST EN ISO 11925-2:2011
INTERNATIONAL ISO
STANDARD 11925-2
Third edition
2010-11-01
Reaction to fire tests — Ignitability of
products subjected to direct impingement
of flame —
Part 2:
Single-flame source test
Essais de réaction au feu — Allumabilité de produits soumis à
l'incidence directe de la flamme —
Partie 2: Essai à l'aide d'une source à flamme unique
Reference number
ISO 11925-2:2010(E)
©
ISO 2010
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
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Published in Switzerland
ii © ISO 2010 – All rights reserved
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
4 Test apparatus .2
5 Test specimen.4
5.1 Preparation.4
5.2 Dimensions .4
5.3 Products which are not essentially flat.4
5.4 Number of specimens.4
5.5 Substrates .5
6 Conditioning .5
7 Test procedure.5
7.1 General .5
7.2 Preliminary operations.5
7.3 Testing operations .6
7.4 Duration of test.7
8 Expression of results.7
9 Test report.7
Annex A (informative) Precision of test method.23
Bibliography.26
© ISO 2010 – All rights reserved iii
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(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. 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. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11925-2 was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 1, Fire
initiation and growth.
This third edition cancels and replaces the second edition (ISO 11925-2:2002), which has been technically
revised.
ISO 11925 consists of the following parts, under the general title Reaction to fire tests — Ignitability of
products subjected to direct impingement of flame:
1)
⎯ Part 1: Guidance on ignitability [Technical Report]
⎯ Part 2: Single-flame source test
1)
⎯ Part 3: Multi-source test
1) The main title of ISO 11925 has been changed since these parts were first published, originally referring to the
ignitability of building products only. It is intended that these parts be aligned with the new main title at their next revision.
iv © ISO 2010 – All rights reserved
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
Introduction
This fire test method has been developed to define reaction to the fire performance of products. The method
specifies a test for determining the ignitability of products by direct small-flame impingement under zero
impressed irradiance using vertically oriented test specimens.
Although the method is designed to assess ignitability, this is addressed by measuring the spread of a small
flame up the vertical surface of a specimen following application of a small (match-sized) flame to either the
surface or edge of a specimen for either 15 s or 30 s. The determination of the production of flaming droplets
depends on whether or not the filter paper placed beneath the specimen ignites.
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SIST EN ISO 11925-2:2011
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SIST EN ISO 11925-2:2011
INTERNATIONAL STANDARD ISO 11925-2:2010(E)
Reaction to fire tests — Ignitability of products subjected to
direct impingement of flame —
Part 2:
Single-flame source test
WARNING — The attention of all persons concerned with managing and carrying out this test is drawn
to the fact that fire testing can be hazardous and that there is a possibility that toxic and/or harmful
smoke and gases can be evolved during the test. Operational hazards can also arise during the
testing of specimens and the disposal of test residues.
An assessment of all potential hazards and risks to health should be made and safety precautions
identified and provided. Written safety instructions should be issued. Appropriate training should be
given to relevant personnel. Laboratory personnel should ensure that they follow written safety
instructions at all times.
Adequate means of extinguishing the specimen should be provided, bearing in mind that some
specimens can produce severe flaming during the test. A hand water spray or an inert gas
suppression system, e.g. compressed nitrogen, which can be directed to the burning area, should be
available together with other means, such as fire extinguishers.
In some cases, smouldering can be difficult to extinguish completely and immersion in water can be
necessary.
1 Scope
This part of ISO 11925 specifies a method of test for determining the ignitability of products by direct small
flame impingement under zero impressed irradiance using vertically oriented test specimens.
Information on the precision of the test method is given in Annex A.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 13238, Reaction to fire tests for building products — Conditioning procedures and general rules for
selection of substrates
ISO 13943, Fire safety — Vocabulary
ISO 14697, Reaction-to-fire tests — Guidance on the choice of substrates for building and transport products
© ISO 2010 – All rights reserved 1
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 13943 and the following apply.
3.1
product
material, element or component about which information is required
3.2
essentially flat product
product having one of the following characteristics:
a) a planar exposed surface;
b) a planar exposed surface with a surface irregularity that is evenly distributed over the exposed surface,
provided that
⎯ at least 50 % of the surface of a representative square area of 250 mm × 250 mm lies within a depth
of 6 mm from a plane taken across the highest points on the exposed surface, or
⎯ for a surface containing cracks, fissures or holes, these do not exceed 6,5 mm in width or 10 m in
depth, and that the total area of such cracks, fissures or holes at the surface does not exceed 30 %
of a representative square area of 250 mm × 250 mm of the exposed surface
3.3
flaming droplets
flaming particle
material separating from the specimen during the fire test procedure and igniting the filter paper beneath the
specimen
3.4
sustained flaming
persistence of flame for a period greater than 3 s
3.5
ignition
presence of sustained flaming
4 Test apparatus
4.1 Test room, capable of providing an environment at (23 ± 5) °C and a relative humidity of (50 ± 20) %.
NOTE It has been found that a partially darkened room assists with the perception of small surface flames.
4.2 Combustion chamber, consisting of an enclosure constructed from stainless steel sheets, with
heat-resistant, glazed doors provided for access and observation in at least the front and one lateral side (see
Figure 1). Ventilation of the enclosure shall be free through the square box section base in the bottom of the
chamber. This shall be made of stainless steel of 1,5 mm thickness, 50 mm in height, with the open square
area being 25 mm × 25 mm. To make free ventilation possible, the chamber shall stand on 40 mm high
supports which provide a gap on the lateral sides of the combustion chamber. The air velocity measured on
the central axis in the chimney of the combustion chamber shall be (0,7 ± 0,1) m/s, measured with the burner
only ignited and with the ventilation hood “on”. The combustion chamber shall be situated under a suitably
ventilated hood.
4.3 Ignition source, consisting of burner constructed as shown in Figure 2 and designed so that it can be
used vertically or be tilted at 45° with respect to the vertical axis. The burner shall be mounted onto a
2 © ISO 2010 – All rights reserved
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
horizontal plate so that it moves smoothly forwards and backwards in a horizontal plane along the centreline
of the combustion chamber.
The burner shall be fitted with a fine adjustment valve to ensure accurate control of the flame height.
4.4 Fuel, consisting of commercial propane of 95 % minimum purity. In order to obtain flame stability with
the burner tilted at 45°, the gas pressure shall be between 10 kPa and 50 kPa.
4.5 Specimen holder, consisting of two stainless steel U-shaped frames. The thickness of the frames shall
be (5 ± 1) mm. The dimensions of the frame shall be as shown in Figure 3 a). The frame shall hang vertically
from the support (see 4.6 and Figure 4) such that the underside of the specimen is exposed directly to the
flame along its centreline and edges (see Figures 5 to 7). The two halves of the specimen holder shall be held
together by screws or clamps to prevent the specimen warping.
It is important that the technique of clamping used be capable of restraining the specimen for the total duration
of the test.
NOTE Small pins of approximately 1 mm in length incorporated on the surface of the frame to which the specimen is
attached have been found suitable.
For multilayered products, a typical test frame as shown in Figure 3 b) shall be used when carrying out the
prescribed additional set of tests on multilayer test specimens of thickness greater than 10 mm according to
7.3.3.2.3.
For the mounting and fixing of loose fill material, the following applies.
c) A specimen holder as shown in Figure 3 c) shall be used.
d) When making the specimens for testing, the surface of the loose fill material specimen shall be as even
as possible.
e) A wire lacing shall be used to retain the specimen if material falls from the specimen holder.
0,2 mm wire shall be used to form 11 rows vertically in front of the opening to hold the loose fill material in
place. The wire lacing will have the shape of a harp.
f) If the material is a mixture of various grain sizes, the release of smaller particles from the open central
surface does not justify the use of the harp.
g) It is deemed sufficient to carry out the tests with a surface flame attack. Edge flame attack tests are not
necessary.
4.6 Support, consisting of a vertical stand to which the specimen holder is attached such that it hangs
vertically and exposes its open edge containing the specimen to the burner flame (see Figure 4).
The distance between the underside of the specimen and the top of horizontal plate above the metal grid shall
be (125 ± 10) mm for edge flame impingement and (85 ± 10) mm for surface flame impingement.
4.7 Timing device, capable of recording elapsed time to the nearest second and which shall be accurate to
within 1 s in 1 h.
0 0
4.8 Template, consisting of one metal plate (250 ) mm long and (90 ) mm wide.
−1 −1
4.9 Flame checking devices
4.9.1 Flame-height measuring device, capable of indicating a flame height of 20 mm (see Figure 8) when
located against a fixed point of the burner. The tolerance on the flame-height measuring device shall be
±0,1 mm.
© ISO 2010 – All rights reserved 3
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
The flame height shall be measured from the upper edge of the burner to the yellow tip of the flame. This
check shall be conducted before testing each specimen.
4.9.2 Burner spacer for edge flame impingement, removable, 16 mm long, which can be mounted at the
burner orifice to check the distance from the pre-set flame contact point on the specimen (see Figure 9).
4.9.3 Burner spacer for surface flame impingement, removable, cone-shaped, which can be mounted at
the burner orifice to check the fixed distance of 5 mm between the burner edge and specimen surface (see
Figure 9).
4.10 Anemometer, hot wire, with an accuracy of ±0,1 m/s, for measuring the airflow velocity in the upper
outlet of the combustion chamber (see 4.2 and Figure 1).
4.11 Filter paper and tray. The paper shall be new undyed filter paper with a mass/unit area of
2
(75 ± 15) g/m and an ash content of less than 0,1 %. The filter paper shall be kept in a desiccator prior to use
in the test. The tray shall be 100 mm × 50 mm and 10 mm deep with a thickness of 0,175 ± 0,025 mm, made
of aluminium foil. The tray is placed beneath the specimen holder and is replaced between tests.
4.12 Apparatus to allow observation of the reverse face of the specimen. For some materials, it is
sometimes necessary to observe the flame on the reverse face of the specimen as well as the exposed face.
Provision shall therefore be made to enable the operator to view both sides of the specimen at the same time.
One method by which this may be achieved is to hang a mirror above and behind the test specimen. The
design and location of the mirror shall be appropriate for the construction of the equipment and the available
ambient lighting. The result observed on the reverse face shall be treated as if it occurred on the front side.
5 Test specimen
5.1 Preparation
The test specimen shall be cut from a sample which is representative of the product to be tested using the
templates specified in 4.8.
5.2 Dimensions
+2 +2
The dimensions of the test specimens shall be (250 ) mm long by (90 ) mm wide.
−2 −2
Specimens normally having a thickness of 60 mm or less shall be tested using their full thickness. Specimens
normally having a thickness greater than 60 mm shall be reduced to a thickness of 60 mm by cutting away the
unexposed surface. If it is necessary to reduce the specimen size in this manner, the cut surface shall not be
exposed to the flame.
For products which are normally manufactured in sizes less than the test specimen, a test sample of
appropriate size shall be specifically produced for the test.
5.3 Products which are not essentially flat
When the product is not an essentially flat product, the specimens may be tested in the form of their end use
(e.g. pipe insulation). The product shall be supplied in its entirety or as specimens of lengths of 250 mm.
5.4 Number of specimens
5.4.1 For each exposure condition, a minimum of six representative specimens of the product shall be
tested. Three specimens shall be cut lengthwise and three crosswise.
4 © ISO 2010 – All rights reserved
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
5.4.2 If a product under test is asymmetric through its thickness and in practice either face may be exposed
to a source of ignition, test a separate series of specimens on each face.
5.4.3 Where a product has areas of its surface which are distinctly different, but each of these separate
areas can satisfy the surface characteristics for essentially flat products, then more than one test set shall be
conducted to evaluate the product.
5.4.4 If a product is installed with covered edges, but can also be used with unprotected edges, tests shall
be performed on both covered and uncovered specimens.
5.5 Substrates
Where a substrate is used, it shall be selected in accordance with EN 13238 or ISO 14697.
Care is needed when preparing test specimens for bottom-edge exposure of materials applied to substrates,
since in practice the substrate may extend beyond the bottom of the material to be tested and not itself be
subject to edge exposure. The configuration of the test specimen should reflect the practical aspects such as
type of substrate and fixing to substrate.
NOTE Additional advice on the use of substrates can be found in any relevant product standard.
6 Conditioning
Test specimens and filter paper shall be conditioned in accordance with EN 13238.
Test specimens shall be conditioned at a temperature of (23 ± 2) °C and a relative humidity of (50 ± 5) %.
Test specimens shall be arranged within the conditioning environment such that air can circulate around each
individual test specimen.
Test specimens shall be conditioned for a minimum period of 48 h, until constant mass is achieved. Constant
mass is considered to be achieved when two successive weighing operations carried out at an interval of 24 h,
do not differ by more than 0,1 % of the mass of the specimen or 0,1 g, whichever is the greater.
7 Test procedure
7.1 General
Two flame application times are available, 15 s or 30 s, as required by the sponsor. The start time of the test
is on application of the flame.
7.2 Preliminary operations
7.2.1 Check the required airflow velocity in the chimney of the combustion chamber (see 4.2).
7.2.2 Remove the set of six test specimens from the conditioning environment and test them within 30 min.
If necessary, the test specimen can be transferred from the conditioning room to the test apparatus in a
sealed container.
7.2.3 Clamp the test specimen in the specimen holder so that one end and both sides are covered by the
holder frames and the exposed end is 30 mm from the end of the frame (see Figure 3).
NOTE The operator can find it useful to mark the specimen holder such that the bottom edge of the test specimen is
always placed at this distance.
© ISO 2010 – All rights reserved 5
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SIST EN ISO 11925-2:2011
ISO 11925-2:2010(E)
7.2.4 Check the distances of the burner from the specimen by means of the relevant spacer specified
in 4.9.2 or 4.9.3 with the burner tilted at 45° (see Figures 4 to 7, as appropriate).
7.2.5 Position two pieces of filter paper in the aluminium foil tray beneath the specimen, not more than
3 min before the start of the test. Do not remove the filter paper from the desiccator more than 3 min before
the start of the test.
7.3 Testing operations
7.3.1 Light the burner in the vertical position and allow the flame to stabilize. Adjust the burner valve to give
a flame height of 20 mm using the device specified in 4.9.1. This operation is carried out away from the
pre-set operating position to prevent accidental impingement of the flame on the test specimen. The flame
height shall be checked prior to each flame application.
NOTE It has been found useful to measure the flame height against a black background.
7.3.2 Tilt the burner at 45° with respect to its vertical axis and advance it horizontally until the flame reaches
the pre-set contact point with the test specimen.
Start the timing device at the moment the flame is brought into contact with the test specimen. Apply the flame
for 15 s or 30 s as required by the sponsor and then retract the burner in a smooth continuous manner.
7.3.3 Exposure conditions.
Tests may need to be conducted to either surface exposure or edge exposure, or both.
NOTE Advice on exposure conditions can be given in the relevant product standards.
7.3.3.1 Surface exposure.
For all essentially flat products, the flame shall be applied on the
...
SLOVENSKI STANDARD
oSIST prEN ISO 11925-2:2009
01-april-2009
Preskusi odziva na ogenj - Sposobnost vžiga gradbenih proizvodov v
neposrednem stiku s plamenom - 2. del: Preskus z enim gorilnikom (ISO/DIS 11925
-2:2009)
Reaction to fire tests - Ignitability of building products subjected to direct impingement of
flame - Part 2: Single-flame source test (ISO/DIS 11925-2:2009)
Prüfungen zum Brandverhalten von Baustoffen - Entzündbarkeit von Bauprodukten bei
direkter Flammeneinwirkung - Teil 2: Einflammtest (ISO/DIS 11925-2:2008)
Essais de réaction au feu - Allumabilité des produits de bâtiment soumis à l'incidence
directe de la flamme - Partie 2: Essai à l'aide d'une source à flamme unique (ISO/DIS
11925-2:2009)
Ta slovenski standard je istoveten z: prEN ISO 11925-2
ICS:
13.220.50 Požarna odpornost Fire-resistance of building
gradbenih materialov in materials and elements
elementov
91.060.01 Stavbni elementi na splošno Elements of buildings in
general
91.100.01 Gradbeni materiali na Construction materials in
splošno general
oSIST prEN ISO 11925-2:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 11925-2:2009
---------------------- Page: 2 ----------------------
oSIST prEN ISO 11925-2:2009
EUROPEAN STANDARD
DRAFT
prEN ISO 11925-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2009
ICS 13.220.50; 91.060.01; 91.100.01 Will supersede EN ISO 11925-2:2002
English Version
Reaction to fire tests - Ignitability of building products subjected
to direct impingement of flame - Part 2: Single-flame source test
(ISO/DIS 11925-2:2009)
Essais de réaction au feu - Allumabilité des produits de Prüfungen zum Brandverhalten von Baustoffen -
bâtiment soumis à l'incidence directe de la flamme - Partie Entzündbarkeit von Bauprodukten bei direkter
2: Essai à l'aide d'une source à flamme unique (ISO/DIS Flammeneinwirkung - Teil 2: Einflammtest (ISO/DIS 11925-
11925-2:2009) 2:2008)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 127.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language
made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the
same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 11925-2:2009: E
worldwide for CEN national Members.
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oSIST prEN ISO 11925-2:2009
prEN ISO 11925-2:2009 (E)
Contents Page
Foreword .3
2
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oSIST prEN ISO 11925-2:2009
prEN ISO 11925-2:2009 (E)
Foreword
This document (prEN ISO 11925-2:2009) has been prepared by Technical Committee ISO/TC 92 "Fire safety"
in collaboration with Technical Committee CEN/TC 127 “Fire safety in buildings” the secretariat of which is
held by BSI.
This document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 11925-2:2002.
Endorsement notice
The text of ISO/DIS 11925-2:2009 has been approved by CEN as a prEN ISO 11925-2:2009 without any
modification.
3
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oSIST prEN ISO 11925-2:2009
DRAFT INTERNATIONAL STANDARD ISO/DIS 11925-2
ISO/TC 92/SC 1 Secretariat: BSI
Voting begins on: Voting terminates on:
2009-01-15 2009-06-15
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Reaction to fire tests — Ignitability of building products
subjected to direct impingement of flame —
Part 2:
Single-flame source test
Essais de réaction au feu — Allumabilité des produits de bâtiment soumis à l'incidence directe de la flamme —
Partie 2: Essai à l'aide d'une source à flamme unique
[Revision of second edition (ISO 11925-2:2002)]
ICS 13.220.50
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
In accordance with the provisions of Council Resolution 15/1993 this document is circulated in
the English language only.
Conformément aux dispositions de la Résolution du Conseil 15/1993, ce document est distribué
en version anglaise seulement.
To expedite distribution, this document is circulated as received from the committee secretariat.
ISO Central Secretariat work of editing and text composition will be undertaken at publication
stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
THIS DOCUMENT IS A DRAFT CIRCULATED FOR COMMENT AND APPROVAL. IT IS THEREFORE SUBJECT TO CHANGE AND MAY NOT BE
REFERRED TO AS AN INTERNATIONAL STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS BEING ACCEPTABLE FOR INDUSTRIAL, TECHNOLOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT, WITH THEIR COMMENTS, NOTIFICATION OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPORTING DOCUMENTATION.
©
International Organization for Standardization, 2009
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oSIST prEN ISO 11925-2:2009
ISO/DIS 11925-2
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©
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ISO/DIS 11925-2: 2008
Contents Page
1 Scope. 1
2 Normative references . 1
3 Terms and definitions. 1
4 Test apparatus. 2
4.1 Test room. 2
4.2 Combustion chamber . 2
4.3 Ignition source . 2
4.4 Fuel. 3
4.5 Specimen holder . 3
4.6 Support. 3
4.7 Timing device . 3
4.8 Template . 4
4.9 Flame checking devices. 4
4.10 Anemometer . 4
4.11 Filter paper and tray. 4
4.12 Apparatus to allow observation of the reverse face of the specimen. 4
5 Test specimen . 5
5.1 Preparation . 5
5.2 Dimensions. 5
5.3 Products which are not essentially flat . 5
5.4 Number. 5
5.5 Substrates. 5
6 Conditioning . 6
7 Test procedure . 6
7.1 General. 6
7.2 Preliminary operations . 6
7.3 Testing operations. 6
7.4 Duration of test. 7
8 Expression of results. 7
9 Test report . 8
Annex A (informative) Precision of test method. 20
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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. 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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all
matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives,
Part 2.
The main task of technical committees is to prepare International Standards. 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.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11925-2 was prepared by Technical Committee ISO/TC 92, Fire safety in buildings,
Subcommittee SC 01, Fire initiation and growth.
This second edition cancels and replaces the first edition which been technically revised.
ISO 11925 consists of the following parts, under the general title Reaction to fire tests — Ignitability of
building products when subjected to direct impingement of flame:
Part 1:– Guidance on ignitability
Part 2: Single-flame source test
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Introduction
This fire test method has been developed to define reaction to fire performance of products. The
method specifies a test for determining the ignitability of building products by direct small flame
impingement under zero impressed irradiance using specimens tested in a vertical orientation.
Although the method is designed to assess ignitability, this is addressed by measuring the spread of a
small flame up the vertical surface of a specimen following application of a small (match size) flame to
either the surface or edge of a specimen for either 15 s or 30 s. The production of flaming droplets is
determined by whether the filter paper used beneath the specimen ignites or not.
Safety warning
The attention of all persons concerned with managing and carrying out this test is drawn to the fact
that fire testing may be hazardous and that there is a possibility that toxic and/or harmful smoke and
gases may be evolved during the test. Operational hazards may also arise during the testing of
specimens and the disposal of test residues.
An assessment of all potential hazards and risks to health should be made and safety precautions
should be identified and provided. Written safety instructions should be issued. Appropriate training
should be given to relevant personnel. Laboratory personnel should ensure that they follow written
safety instructions at all times.
Adequate means of extinguishing the specimen should be provided, bearing in mind that some
specimens may produce severe flaming during the test. A hand water spray or compressed nitrogen
which can be directed to the burning area should be available with other means, such as fire
extinguishers etc.
In some cases, smouldering may be difficult to extinguish completely and immersion in water may be
necessary.
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oSIST prEN ISO 11925-2:2009
DRAFT INTERNATIONAL STANDARD ISO/DIS 11925-2
Reaction to fire tests — Ignitability of building products
subjected to direct impingement of flame —
Part 2:
Single-flame source test
1 Scope
This International Standard specifies a method of test for determining the ignitability of products by
direct small flame impingement under zero impressed irradiance using specimens tested in a vertical
orientation.
The products that melt and shrink away from the flame without being ignited may be addressed by the
additional procedure given in annex A.
Information on the precision of the test method is given in annex B.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
EN 13238, Reaction to fire tests for building products — Conditioning procedures and general rules
for selection of substrates.
EN ISO 13943: 2000, Fire safety — Vocabulary (ISO 13943:2000).
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in EN ISO 13943:2000,
together with the following, apply:
3.1
product
material, element or component about which information is required
3.2
essentially flat product
product having one of the following characteristics:
a) a planar exposed surface;
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b) a planar exposed surface, with a surface irregularity that is evenly distributed over the exposed
surface provided that:
i) at least 50 % of the surface of a representative square area of 250 mm × 250 mm lies
within a depth of 6 mm from a plane taken across the highest points on the exposed
surface; or
ii) for a surface containing cracks, fissures or holes which do not exceed 6,5 mm in width
nor 10 mm in depth. The total area of such cracks, fissures or holes at the surface does
not exceed 30 % of a representative square area of 250 mm × 250 mm of the exposed
surface.
3.3
flaming debris
material separating from the specimen during the fire test procedure and continuing to flame. For the
purposes of this standard, ignition of the filter paper beneath the specimen indicates flaming debris
3.4
sustained flaming
persistence of flame for a period greater than 3 s
3.5
ignition
presence of sustained flaming
4 Test apparatus
4.1 Test room
A room capable of providing an environment at (23 ± 5) °C and a relative humidity of (50 ± 20) %.
NOTE It has been found that a partially darkened room assists with the perception of small surface flames.
4.2 Combustion chamber
An enclosure (see Figure 1) constructed from stainless steel sheets, with heat resistant, glazed doors
provided for access and observation in at least the front and one lateral side. Ventilation of the
enclosure shall be free through the square box section base in the bottom of the chamber. This shall
be made of stainless steel of 1,5 mm thickness, 50 mm in height, with the open square area being
25 mm × 25 mm (see Figure 1). To make free ventilation possible, the chamber shall stand on 40 mm
high supports which provide a gap on the lateral sides of the combustion chamber. The gap between
the supports at the front and the back of the chamber shall be closed. The air velocity measured in
the chimney of the combustion chamber, as shown in Figure 1, shall be (0,7 ± 0,1) m/s, measured
with the pilot burner only ignited and with the ventilation hood ‘on’.
The combustion chamber shall be situated under a suitably ventilated hood.
4.3 Ignition source
A burner is constructed as shown in Figure 2 and designed so that it can be used vertically or be tilted
at 45° with respect to the vertical axis. The burner shall be mounted onto a horizontal plate so that it
moves smoothly forwards and backwards in a horizontal plane along the centreline of the combustion
chamber.
The burner shall be fitted with a fine adjustment valve to ensure accurate control of the flame height.
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4.4 Fuel
The fuel shall be commercial propane 95 % minimum purity. In order to obtain flame stability with the
burner tilted at 45°, the gas pressure shall be between 10 kPa and 50 kPa.
4.5 Specimen holder
The specimen holder consists of a double stainless steel U-shaped frame, 15 mm wide and
(5 ± 1) mm thick, with other dimensions as shown in Figure 3a. The frame hangs vertically from the
support (see 4.6 and Figure 4) in such a way that the underside of the specimen is exposed directly to
the flame along its centre line and edges (see Figures 5 to 7).
The two halves of the specimen holder are held together by screws or clamps to prevent the
specimen warping.
It is important that the technique of clamping used is capable of restraining the specimen for the total
duration of the test.
NOTE Small pins of approximately 1 mm in length may be incorporated on the surface of the frame to which
the specimen is attached.
For multilayered products, a typical test frame shown in Figure 3b shall be used when carrying out the
prescribed additional set of tests on multilayer test specimens of thickness greater than 10 mm,
according to Clause 7.3.3.2.3.
4.5.1 Mounting and fixing of loose fill material
For loose fill material the following procedure shall be followed:
a) A specimen holder as shown in Figure 3c shall be used.
b) When making the specimens for test, the surface shall be as even as possible.
c) A wire lacing shall be used to retain the specimen if material falls from the specimen holder. 0
d) If the material is a mixture of various grain sizes, the release of smaller particles from the open
central surface does not justify the use of the harp.
e) It is deemed sufficient to carry out the tests with a surface flame attack. Edge flame attack tests
are not necessary.
4.6 Support
A vertical stand to which the specimen holder is attached in such a way that it hangs vertically and
exposes its open edge containing the specimen to the burner flame, see Figure 4.
The distance between the underside of the specimen and the top of horizontal plate above the metal
grid shall be (125 ± 10) mm for edge flame impingement and (85 ± 10) mm for surface flame
impingement respectively.
4.7 Timing device
The timing device shall be capable of recording elapsed time to the nearest second and shall be
accurate to within 1 s in 1 h.
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4.8 Template
+0 +0 +0
Two metal plates, one (250 ) mm long and (90 ) mm wide and the other (250 ) mm long and
−1 −1 −1
+0
(180 ) mm wide, the larger one being used if the procedure in annex A is followed.
−1
4.9 Flame checking devices
4.9.1 Flame height measuring device
A suitable device that, when located against a fixed point of the burner, indicates a flame height of
20 mm (see Figure 8). The tolerance on the flame height-measuring device shall be ± 0,1 mm.
4.9.2 Burner spacer for edge flame impingement
A removable spacer 16 mm long which can be mounted at the burner orifice to check the distance
from the pre-set flame contact point on the specimen (see Figure 9).
4.9.3 Burner spacer for surface flame impingement
A removable cone shaped spacer which can be mounted at the burner orifice to check the fixed
distance of 5 mm between the burner edge and specimen's surface (see Figure 9).
4.10 Anemometer
A suitable anemometer with an accuracy of ± 0,1 m/s shall be provided for measuring the airflow
velocity in the upper outlet of the combustion chamber (see 4.2 and Figure 1).
4.11 Filter paper and tray
2
The paper shall be new undyed filter paper with a mass/unit area of (75+/-15) g/m with an ash
content of less than 0,1 %.
The tray, 100 mm × 50 mm and 10 mm deep, shall be made of aluminium foil. The tray is placed
beneath the specimen holder and is replaced between tests.
4.12 Apparatus to allow observation of the reverse face of the specimen
For some materials, it is sometimes necessary to observe the flame on the reverse face of the
specimen as well as the exposed face.
Provision shall be made to enable to operator to view both sides of the specimen at the same time.
One method by which this may be achieved is to hang a mirror above and behind the test specimen.
The design and location of the mirror shall be appropriate for the construction of the equipment and
the available ambient lighting.
The result observed on the reverse face shall be treated as if it occurred on the front side. This result
will influence both the test result and the classification.
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5 Test specimen
5.1 Preparation
The test specimen is cut from a sample which is representative of the product to be tested using the
templates specified in 4.8.
5.2 Dimensions
+0 +0
The dimensions of the test specimens shall be (250 ) mm long by (90 ) mm wide.
−1 −1
Specimens of normal thickness 60 mm or less shall be tested using their full thickness. Specimens of
normal thickness greater than 60 mm shall be reduced to a thickness of 60 mm by cutting away the
unexposed surface. If it is necessary to reduce the specimen size in this manner, the cut surface shall
not be exposed to the flame.
For products which are normally manufactured in sizes less than the test specimen, a test sample of
appropriate size shall be specifically produced for the test.
5.3 Products which are not essentially flat
When the product is not essentially flat, the specimens may be tested in the form as in end use
(e.g. pipe insulation). The product shall be supplied in its entirety or as specimens of length of
250 mm.
5.4 Number
5.4.1 For each exposure condition a minimum of six representative specimens of the product shall
be tested. Three specimens shall be cut lengthwise and three crosswise.
5.4.2 If a product under test is asymmetric through its thickness, and in practice either face may be
exposed to a source of ignition, test a separate series of specimens on each face.
5.4.3 Where a product has areas of its surface which are distinctly different, but each of these
separate areas can satisfy the surface characteristics described in 3.2, then more than one test set
shall be conducted to evaluate the product.
5.4.4 If a product is installed with covered edges, but can also be used with unprotected edges,
tests shall be performed on both covered and uncovered specimens.
5.5 Substrates
Where, in end use conditions, products are fixed to substrates, then the test specimen shall represent
the end use conditions. Substrates shall be selected in accordance with EN 13238.
In general the specimen shall be tested without being attached to a substrate unless the substrate
type and relevant mounting and fixing arrangements have been defined in the relevant Technical
Standard.
NOTE Care is needed when preparing test specimens for bottom edge exposure of materials applied to
substrates, since in practice the substrate may extend beyond the bottom of the material to be tested and not
itself be subject to edge exposure. The configuration of the test specimen should reflect the practical aspects
such as typ
...
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