SIST EN ISO 11925-2:2011

Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2010)

ISO 11925-2:2010 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.

Prüfungen zum Brandverhalten von Baustoffen - Entzündbarkeit von Bauprodukten bei direkter Flammeneinwirkung - Teil 2: Einflammtest (ISO 11925-2:2010)

Dieser Teil von ISO 11925 legt ein Prüfverfahren fest, um die Entzündbarkeit von Produkten, die in vertikaler
Anordnung geprüft werden, mit Hilfe einer direkt einwirkenden kleinen Flamme ohne zusätzliche
Wärmebestrahlung zu ermitteln.
Hinweise zur Messunsicherheit des Prüfverfahrens sind Anhang A 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

• Status: Withdrawn
• Public Enquiry End Date: 14-May-2009
• Publication Date: 13-Feb-2011
• Withdrawal Date: 14-Apr-2020
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• Technical Committee: POZ - Požarna varnost
• Current Stage: 9900 - Withdrawal (Adopted Project)
• Start Date: 14-Apr-2020
• Due Date: 07-May-2020
• Completion Date: 15-Apr-2020
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/088 - CPD: Reaction to fire
• Mandate: M/100 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on precast concrete products
• Mandate: M/102 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on membranes
• Ref Project: EN ISO 11925-2:2010 - Reaction to fire tests - Ignitability of products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2010)

Relations

• Replaces: SIST ISO 11925-2:1998 - Reaction to fire tests -- Ignitability of building products subjected to direct impingement of flame -- Part 2: Single flame source test
• Effective Date: 01-Mar-2011
• Replaces: SIST ISO 11925-2:1998/Cor.1:1999 - Reaction to fire tests - Ignitability of building products subjectedto direct impingement of flame -Part 2:Single flame source test - Technical corrigendum 1
• Effective Date: 01-Mar-2011
• Replaces: SIST EN ISO 11925-2:2002 - Reaction to fire tests - Ignitability of building products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2002)
• Effective Date: 01-Mar-2011
• Replaced By: SIST EN ISO 11925-2:2020 - Reaction to fire tests - Ignitability of products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2020)
• Effective Date: 01-May-2020
• Corrected By: SIST EN ISO 11925-2:2011/AC:2011 - Reaction to fire tests - Ignitability of products subjected to direct impingement of flame - Part 2: Single-flame source test - Technical Corrigendum 1 (ISO 11925-2:2010/Cor 1:2011)
• Effective Date: 01-Jun-2011

Standards Content (Sample)

SLOVENSKI STANDARD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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.

Contents Page
Foreword .3

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.
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
ISO 11925-2:2010(E)
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ii © ISO 2010 – All rights reserved

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 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

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.

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 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

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 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 p
...