EN ISO 11925-2:2020

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN ISO 11925-2:2011
SIST EN ISO 11925-2:2011/AC:2011
Preskusi odziva na ogenj - Sposobnost vžiga gradbenih proizvodov v
neposrednem stiku s plamenom - 2. del: Preskus z enim gorilnikom (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)
Prüfungen zum Brandverhalten - Entzündbarkeit von Produkten bei direkter
Flammeneinwirkung - Teil 2: Einzelflammentest (ISO 11925-2:2020)
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 (ISO 11925-2:2020)
Ta slovenski standard je istoveten z: EN ISO 11925-2:2020
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.

EN ISO 11925-2
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 13.220.50 Supersedes EN ISO 11925-2:2010
English Version
Reaction to fire tests - Ignitability of products subjected to
direct impingement of flame - Part 2: Single-flame source
test (ISO 11925-2:2020)
Essais de réaction au feu - Allumabilité de produits Prüfungen zum Brandverhalten - Entzündbarkeit von
soumis à l'incidence directe de la flamme - Partie 2: Produkten bei direkter Flammeneinwirkung - Teil 2:
Essai à l'aide d'une source à flamme unique (ISO Einzelflammentest (ISO 11925-2:2020)
11925-2:2020)
This European Standard was approved by CEN on 4 February 2020.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11925-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11925-2:2020) 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 September 2020, and conflicting national standards
shall be withdrawn at the latest by September 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 11925-2:2010.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11925-2:2020 has been approved by CEN as EN ISO 11925-2:2020 without any
modification.
INTERNATIONAL ISO
STANDARD 11925-2
Fourth edition
2020-02
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 11925-2:2020(E)
©
ISO 2020
ISO 11925-2:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 11925-2:2020(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
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. 5
7.4 Duration of test . 7
8 Expression of results . 7
9 Test report . 8
Annex A (informative) Precision of test method .22
Annex B (normative) Testing not essentially flat end-use products .25
Annex C (normative) Testing perforated end-use products .26
Bibliography .27
ISO 11925-2:2020(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 92, Fire safety, Subcommittee SC 1, Fire
initiation and growth.
This fourth edition cancels and replaces the third edition (ISO 11925-2:2010), which has been
technically revised. It also incorporates the Technical Corrigendum ISO 11925-2:2010/Cor1: 2011.
A list of all parts in the ISO 11925 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

ISO 11925-2:2020(E)
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 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
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