《BS-EN-ISO-11925-2-2002.pdf》由会员分享,可在线阅读,更多相关《BS-EN-ISO-11925-2-2002.pdf(32页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS 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 The European Standard EN ISO 11925-2:2002 has the status of a British Standard ICS 13.220.40; 91.100 NO COPYING WITHOUT BSI PERMI
2、SSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN ISO 11925-2:2002 This British Standard, having been prepared under the direction of the Health and Environment Se
3、ctor Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 26 February 2002 BSI 26 February 2002 ISBN 0 580 39038 1 National foreword This British Standard is the official English language version of EN ISO 11925-2:2002. It is identical wi
4、th ISO 11925-2:2002. It supersedes BS ISO 11925-2:1997 which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee FSH/21, Reaction to fire tests, to Subcommittee FSH/21/2, Ignitability tests, which has the responsibility to: A list of organizations represented o
5、n this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the
6、“Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from l
7、egal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.
8、 Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, pages 2 to 28, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Dat
9、eComments Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11925-2 February 2002 ICS 13.220.50 English version Reaction to fire tests - Ignitability of bu
10、ilding products subjected to direct impingement of flame - Part 2: Single-flame source test (ISO 11925-2:2002) Essais de raction au feu - Allumabilit des produits de btiment soumis lincidence directe de la flamme - Partie 2: Essai laide dune source flamme unique (ISO 11925-2:2002) Brandverhalten von
11、 Baustoffen - Endzndbarkeit von Bauprodukten bei direkter Flammeneinwirkung - Teil 2: Einflammentest (ISO 11925-2:2002) This European Standard was approved by CEN on 3 May 2001. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
12、uropean 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 Management Centre or to any CEN member. This European Standard exists in three official versions (Englis
13、h, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic
14、, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassa
15、rt, 36 B-1050 Brussels 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 11925-2:2002 E Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI
16、 EN ISO 11925-2:2002 (E) 2 Contents page Foreword.3 Introduction 4 1Scope5 2Normative references5 3Terms and definitions.5 4Test apparatus.6 4.1Test room.6 4.2Combustion chamber .6 4.3Ignition source.6 4.4Fuel.6 4.5Specimen holder .6 4.6Support.7 4.7Timing device 7 4.8Template.7 4.9Flame checking de
17、vices.7 4.10Anemometer 7 4.11Filter paper and tray8 5Test specimen .8 5.1Preparation 8 5.2Dimensions8 5.3Products which are not essentially flat.8 5.4Number.8 5.5Substrates9 6Conditioning9 7Test procedure 9 7.1General.9 7.2Preliminary operations .9 7.3Testing operations9 7.4Duration of test10 8Expre
18、ssion of results11 9Test report11 Annex A (normative) Procedure for products which melt and shrink 21 A.1General.21 A.2Test apparatus.21 A.3Test specimen .21 A.4Test procedure 21 A.5Expression of results22 Annex B (informative) Precision of test method .26 Licensed Copy: London South Bank University
19、, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN ISO 11925-2:2002 (E) 3 Foreword The text of EN ISO 11925-2:2002 has been prepared by CEN /TC 127 “Fire safety in buildings”, the Secretariat of which is held by BSI, in collaboration with Technical Comm
20、ittee ISO/TC 92 “Fire safety”. 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 August 2002, and conflicting national standards shall be withdrawn at the latest by December 2003. Annex A is normati
21、ve. Annex B is informative. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxe
22、mbourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN ISO 11925-2:2002 (E) 4 Introduction Safety warning The attenti
23、on 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 an
24、d 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 e
25、nsure 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
26、 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. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Co
27、py, (c) BSI EN ISO 11925-2:2002 (E) 5 1 Scope This European Standard specifies a method of test for determining the ignitability of building products by direct small flame impingement under zero impressed irradiance using specimens tested in a vertical orientation. The products that melt and shrink
28、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 This European Standard incorporates by dated or undated reference, provisions from other publications.
29、These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For u
30、ndated references the latest edition of the publication referred to applies (including amendments). EN 13238, Reaction to fire tests for building products Conditioning procedures and general rules for selection of substrates. EN ISO 13943, Fire safety Vocabulary (ISO 13943:1999). 3 Terms and definit
31、ions For the purposes of this European Standard, the terms and definitions given in EN ISO 13943, together with the following, apply: 3.1 product material, element or component about which information is required 3.2 essentially flat product a product having one of the following characteristics: a)
32、a planar exposed surface; 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 p
33、oints 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 m 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 surfac
34、e. Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN ISO 11925-2:2002 (E) 6 3.3 flaming debris material separating from the specimen during the fire test procedure and continuing to flame. For the purposes of
35、this standard, ignition of the filter paper beneath the specimen indicates flaming debris 3.4 sustained flaming the persistence of flame for a period greater than 3 s 3.5 ignition the presence of sustained flaming 4 Test apparatus 4.1 Test room A room capable of providing an environment at (23 5) C
36、and a relative humidity of (50 20) %. NOTEIt 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 observ
37、ation 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
38、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 of the chamber shall be closed. The air velocity measured in the chimney of the combustion chamber, as shown in
39、 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
40、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
41、control of the flame height. 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
42、frame, 15 mm wide and (5 1) mm thick, with other dimensions as shown in Figure 3. 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). Licensed Copy:
43、London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN ISO 11925-2:2002 (E) 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 clam
44、ping used is capable of restraining the specimen for the total duration of the test. NOTESmall pins of approximately 1 mm in length may be incorporated on the surface of the frame to which the specimen is attached. 4.6 Support A vertical stand to which the specimen holder is attached in such a way t
45、hat 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 imping
46、ement 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. 4.8 Template Two metal plates, one (250 ? ? 1 0 ) mm long and (90 ? ? 1 0 ) mm wide and the other (250 ? ? 1 0 ) mm long and (180 ? ? 1
47、 0 ) mm wide, the larger one being used if the procedure in annex A is followed. 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 heigh
48、t-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 r
49、emovable cone shaped spacer which can be mounted at the burner orifice to check the fixed distance of 5 mm between the burner edge and specimens 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). Licensed Copy: London South Bank University, London South Bank University, Thu Mar 01 06:47:55 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN ISO 11925-2:2002 (E) 8 4.11 Filter paper and
链接地址:https://www.31doc.com/p-3744663.html