1、BSI Standards PublicationBS EN 16733:2016Reaction to fire testsfor building products Determination of a buildingproducts propensityto undergo continuoussmoulderingBS EN 16733:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16733:2016.The UK participation in
2、 its preparation was entrusted to TechnicalCommittee FSH/21/-/17, Reaction to fire tests - European fire testmethods including ignitability tests.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the nece
3、ssaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 83888 0ICS 13.220.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was
4、published under the authority of theStandards Policy and Strategy Committee on 31 May 2016.Amendments/corrigenda issued since publicationDate Text affectedBS EN 16733:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16733 May 2016 ICS 13.220.50 English Version Reaction to fire tests for buil
5、ding products - Determination of a building products propensity to undergo continuous smouldering Essais de raction au feu pour les produits de construction - Dtermination de la propension dun produit de construction subir un feu couvant continuPrfungen zum Brandverhalten von Bauprodukten - Bestimmu
6、ng der Neigung eines Bauprodukts zum kontinuierlichen Schwelen This European Standard was approved by CEN on 12 February 2016. 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
7、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 ot
8、her 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
9、, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COM
10、MITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16733:2016 EBS EN 16733:
11、2016EN 16733:2016 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope 5 2 Normative references 5 3 Terms and definitions . 5 4 Principle . 6 5 Test apparatus 6 5.1 Main apparatus 6 5.1.1 Test specimen holder 7 5.1.2 Wire mesh box 7 5.1.3 Propane burner . 7 5.1.4 Thermocouples in the tes
12、t specimen . 7 5.1.5 Recording device . 7 5.2 Additional equipment 8 5.2.1 Flowmeter 8 5.2.2 Timing device . 8 5.2.3 Anemometer . 8 5.2.4 Fire extinguishing board 8 6 Test specimens . 8 6.1 General 8 6.2 Dimensions and number of test specimens . 8 6.3 Loose fill materials . 8 7 Conditioning of speci
13、mens . 8 8 Test procedure . 9 9 Termination of test . 9 10 Expression of results . 10 11 Performance criteria and declaration 10 12 Direct and extended application of test results 10 13 Test report 11 Annex A (informative) Precision of the method 19 A.1 General . 19 A.2 Conclusions 20 Bibilography .
14、 21 BS EN 16733:2016EN 16733:2016 (E) 3 European foreword This document (EN 16733:2016) has been prepared by 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 publicat
15、ion of an identical text or by endorsement, at the latest by November 2016, and conflicting national standards shall be withdrawn at the latest by February 2018. 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 s
16、hall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. This standard is produced in response to the EC mandate M/385. CEN/TC 127 was requested to deve
17、lop this test method to determine possible glowing combustion behaviour in building products. This test method forms part of the present EC classification system for the reaction to fire. Task Group 6 of CEN TC 127/WG4 was created to develop this test method. In the early stages of its development,
18、it was found that the term glowing combustion as defined in EN ISO 13943 does not completely characterize the specific combustion behaviour of a building product. In particular, the increase of temperature which is considered as typical for the process of smouldering is not considered in the EN ISO
19、13943 definition. Therefore the task group made a clarification and changed the term glowing combustion to smouldering combustion. Smouldering is defined in this standard as combustion of a material without flame and with or without visible light. This includes glowing combustion. According to the C
20、EN/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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hung
21、ary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16733:2016EN 16733:2016 (E) 4 Introduction This test method has been developed considering methods
22、NT FIRE 002 and NT FIRE 035 and standards BS 5803-4 and norm B 3800. It specifies a test for determining the propensity of products to smoulder continuously when tested in a vertical orientation. The method does not impose a mechanically influenced airflow through the test specimens since this would
23、 not represent most end-use conditions. 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. Ope
24、rational 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 sh
25、ould 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 an
26、 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 etc. In some cases, smouldering may be difficult to extinguish completely and immersion in water may be necessary. BS EN 16733:20
27、16EN 16733:2016 (E) 5 1 Scope This European Standard specifies a test method to determine the propensity (ability) of a building product to smoulder continuously when exposed to an open flame under the influence of natural convective airflow. It is intended for all building products classified accor
28、ding to EN 13501-1. Details as to how the products is mounted and fixed for this test are given in the relevant product standards. The field of application of the test results is defined in the product standards. 2 Normative references The following documents, in whole or in part, are normatively re
29、ferenced in this document and are indispensable for its application. 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 proc
30、edures and general rules for selection of substrates EN 60584-1 Thermocouples Part 1: EMF specifications and tolerances (IEC 60584-1) EN ISO 13943, Fire safety Vocabulary (ISO 13943) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 13943 and the fo
31、llowing apply. 3.1 product material, composite or assembly about which information is required 3.2 material basic single substance or a uniformly dispersed mixture of substances e.g. metal, stone, wood, concrete, mineral wool 3.3 composite combination of materials which are generally recognised as d
32、iscrete entities e.g. coated or laminated materials 3.4 assembly fabrication of materials and/or composites e.g. sandwich panels 3.5 exposed surface surface of the product which is subjected to the heating conditions of the test 3.6 test specimen representative piece of the sample (prepared for test
33、ing in accordance with instruction) BS EN 16733:2016EN 16733:2016 (E) 6 3.7 smouldering combustion of a material without flame and with or without visible light. This includes glowing combustion Note 1 to entry: Smouldering is generally evidenced by an increase in temperature and/or by the presence
34、of effluents. 3.8 progressive smouldering self-propagating exothermic oxidation that is not accompanied by flaming combustion Note 1 to entry: It can be accompanied by glowing. 3.9 sustained flaming persistence of flaming for a period greater than 10 s 3.10 flame spread propagation of flame away fro
35、m the source of sustained flaming 3.11 glowing combustion combustion of a material in the solid phase without flame but with emission of light from the combustion zone 4 Principle One test specimen is vertically mounted and exposed to constant heat from a propane gas burner with its flame impinging
36、on the specimen surface. Smouldering is detected by measuring temperatures by using thermocouples installed at defined distances within the vertical test specimen and the observation of sustained flaming following re-ignition. 5 Test apparatus 5.1 Main apparatus NOTE All dimensions given in the foll
37、owing description are nominal unless tolerances are specified. The main apparatus is shown in Figures 1, 2 and 3. The apparatus includes: specimen holder; propane burner; wire mesh box (Figure 4); six thermocouples inside the specimen connected to a recording device (Figure 5); specimen holder frame
38、 to hold flexible or thin products in place (Figure 6). BS EN 16733:2016EN 16733:2016 (E) 7 5.1.1 Test specimen holder The specimen mounting frame shall hold the specimen 50 mm above the test floor. This shall be accomplished by the use of two spacers or supporting devices, maximum 50 mm high x 50 m
39、m wide and 100 mm long placed at the outer edge of the specimen, mounted on the floor upon which the bottom edge of the test specimen shall be located. (See Figures 1, 2 and 3). The test specimen shall not be continuously covered from top to bottom on the vertical side edges. The maximum cover on th
40、e vertical edges of the specimens shall consist of two clamps on each side each not more than 40 mm in height. Neither the top nor the bottom edges of the specimen shall be covered in any way. For thin or flexible test specimens, a planar surface shall be maintained. This can be achieved either by c
41、lamping between the sections of flat steel frame, 800 mm 300 mm, with a frame width of 10 mm and a thickness of 3 mm or by using a single frame with pins on all four edges upon which the specimen shall be supported. (See Figure 6). 5.1.2 Wire mesh box For loose fill material the specimen holder show
42、n in Figure 4 shall be used. The specimen holder shall consist of a steel framed wire mesh box, 800 mm high, 300 mm wide and 100 mm deep. The top of the wire mesh box is open and remains open for the test. The wire mesh shall be zinc-coated with a width of mesh 9 mm 1 mm and a wire size 1 mm 0,2 mm.
43、 (See Figure 4). 5.1.3 Propane burner The burner shall be of the Teclu type (see Figure 7). The nominal inner diameter of the burner is 10,3 mm and the nominal inner diameter of the outer tube is 14,95 mm. The gas nozzle shall have an inner diameter of 0,5 mm 0,1 mm. The straight part of the burner
44、tube shall have a length of 100 mm 10 mm, the conical part shall have a length of 35 mm 3 mm. The lower part of the opening of the conical part shall have an inner diameter of 30 mm 5 mm. Propane having a purity of at least 95 % shall be used. The air supply to the burner shall be fully open. The pr
45、opane flow rate of the burner shall be 100 g/h 5 g/h. (0,85 l/min 0,05 l/min). 5.1.4 Thermocouples in the test specimen Six sheathed type K thermocouples according to EN 60584-1 with outer diameter of 1,5 mm shall be positioned within the test specimen. The thermocouples shall be located in the posi
46、tions as shown in Figure 5. The tips of the thermocouples shall be positioned on the centre line of the test specimen at 100 mm intervals measured vertically from the centre line of the burner (see Figure 5). These thermocouples shall be within the test specimen at half the actual specimen thickness
47、. The thermocouples shall be mounted from the reverse face of the test specimen. The thermocouples shall be supported by a framework at the rear of the test specimen, 40 mm x 80 mm x 855 mm. This framework shall be positioned at least 50 mm from the reverse face of the test specimen. 5.1.5 Recording
48、 device A recording device shall be used to record the temperatures during the test. The recording device shall be capable of recording data at least every 30 s. BS EN 16733:2016EN 16733:2016 (E) 8 5.2 Additional equipment 5.2.1 Flowmeter The flow of propane to the burner shall be controlled and mea
49、sured with a flowmeter. This shall have an accuracy of 3 %. 5.2.2 Timing device This shall have an accuracy of 1 s per h. 5.2.3 Anemometer A hot wire anemometer with an accuracy of 0,1 ms-1. 5.2.4 Fire extinguishing board A calcium silicate board (suggested size 850 320 10 mm) shall be used to extinguish any flaming established after removal of the burner. The board shall be placed over the face of the specimen to extinguish any flaming. 6 Test specimens 6.1 General The test specimens shall be cut from a sample which is represe
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