DIN EN ISO 11925-2-2011 Reaction to fire tests - Ignitability of products subjected to direct impingement of flame - Part 2 Single-flame source test (ISO 11925-2 2010) German versi.pdf

1、February 2011 Translation by DIN-Sprachendienst.English price group 15No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).I

2、CS 13.220.50; 91.060.01; 91.100.01!$my)“1748606www.din.deDDIN EN ISO 11925-2Reaction to fire tests Ignitability of products subjected to direct impingement of flame Part 2: Single-flame source test (ISO 11925-2:2010)English translation of DIN EN ISO 11925-2:2011-02Prfungen zum Brandverhalten Entzndb

3、arkeit von Produkten bei direkter Flammeneinwirkung Teil 2: Einzelflammentest (ISO 11925-2:2010)Englische bersetzung von DIN EN ISO 11925-2:2011-02Essais de raction au feu Allumabilit de produits soumis lincidence directe de la flamme Partie 2: Essai laide dune source flamme unique (ISO 11925-2:2010

4、)Traduction anglaise de DIN EN ISO 11925-2:2011-02SupersedesDIN EN ISO 11925-2:2002-07www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.3202.11 DIN EN ISO 11925-2:2011-02 2 A comma is used as the decimal marker. National foreword Thi

5、s standard has been prepared by Technical Committee ISO/TC 92 “Fire safety”, Subcommittee SC 1 “Fire initiation and growth” in collaboration with Technical Committee CEN/TC 127 “Fire safety in buildings” (both secretariats: BSI, United Kingdom) in accordance with the Agreement on technical cooperati

6、on between ISO and CEN (Vienna Agreement), lead-managed by ISO. The responsible German body involved in its preparation was the Normenausschuss Bauwesen (Building and Civil Engineering Standards Committee), Working Committee NA 005-52-01 AA Brandverhalten von Baustoffen und Bauteilen Baustoffe. Amen

7、dments This standard differs from DIN EN ISO 11925-2:2002-07 as follows: a) the test procedure for products melting or shrinking away from the flame without being ignited has been deleted (former Annex A); b) the standard has been editorially revised for enhanced reproducibility of the test results.

8、 Previous editions DIN EN ISO 11925-2: 2002-07 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11925-2 November 2010 ICS 13.220.50 Supersedes EN ISO 11925-2:2002English Version Reaction to fire tests Ignitability of products subjected to direct impingement of flame Part 2: Single-flame sour

9、ce test (ISO 11925-2:2010) Essais de raction au feu Allumabilit de produits soumis lincidence directe de la flamme Partie 2: Essai laide d une source flamme unique (ISO 11925-2:2010)Prfungen zum Brandverhalten Entzndbarkeit von Produkten bei direkter Flammeneinwirkung Teil 2: Einzelflammentest (ISO

10、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 biblio

11、graphical 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 responsi

12、bility 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, Greec

13、e, 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 COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Managemen

14、t Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11925-2:2010: EContents DIN EN ISO 11925-2:2011-02 EN ISO 11925-2:2010 (E) 2 Page Foreword3 Introduction .4 1 Scope 5 2 Normative

15、references 5 3 Terms and definitions .6 4 Test apparatus .6 5 Test specimen8 5.1 Preparation .8 5.2 Dimensions.8 5.3 Products which are not essentially flat .8 5.4 Number of specimens .8 5.5 Substrates 9 6 Conditioning.9 7 Test procedure.9 7.1 General9 7.2 Preliminary operations9 7.3 Testing operati

16、ons.10 7.4 Duration of test 11 8 Expression of results 11 9 Test report 11 Annex A (informative) Precision of test method 27 Bibliography 30 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

17、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 lates

18、t 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/CENE

19、LEC 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, Lithuani

20、a, 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. DIN EN ISO 11925-2:2011-02 EN ISO 1

21、1925-2:2010 (E) 3 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 sp

22、ecimens. 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 determinatio

23、n of the production of flaming droplets depends on whether or not the filter paper placed beneath the specimen ignites. DIN EN ISO 11925-2:2011-02 EN ISO 11925-2:2010 (E) 4 WARNING The attention of all persons concerned with managing and carrying out this test is drawn to the fact that fire testing

24、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 a

25、nd 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 b

26、e 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 c

27、ases, 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

28、 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 r

29、eferenced 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 an

30、d transport products DIN EN ISO 11925-2:2011-02 EN ISO 11925-2:2010 (E) 5 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 fl

31、at 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 w

32、ithin 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 r

33、epresentative 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

34、 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

35、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

36、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 c

37、entral 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

38、 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 DIN EN ISO 11925-2:2011-02 EN ISO 11925-2:2010 (E) 6 horizontal plate so that it moves smoothly forwards and backwards in a horizontal plane along the centreline o

39、f 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 k

40、Pa 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 s

41、pecimen 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 f

42、or 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 prescrib

43、ed 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

44、 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

45、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 n

46、ecessary. 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

47、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. 4.8 Template, consisting of one metal plate (25001) mm long and (9

48、001) mm wide. 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. DIN EN ISO 11925-2:2011-02 EN ISO 11925-2:2

49、010 (E) 7 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 t