1、BS ISO 12992:2017Plastics Vertical flame spreaddetermination for film andsheetBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 12992:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 12992:2017. It supersedes BS ISO 129
2、92:1995 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/26, Burning behaviour of plastics and rubbers.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all
3、 the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017.Published by BSI Standards Limited 2017ISBN 978 0 580 89892 1 ICS 13.220.40; 83.080.01 Compliance with a British Standard cannot confer immunity from legal obligations.T
4、his British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2017.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 12992:2017 ISO 2017Plastics Vertical flame spread determination for film and sheetPlastiques Dtermin
5、ation de la propagation verticale de la flamme sur films et feuillesINTERNATIONAL STANDARDISO12992Second edition2017-03Reference numberISO 12992:2017(E)BS ISO 12992:2017ISO 12992:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved.
6、 Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at
7、the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 12992:2017ISO 12992:2017(E)Foreword ivIntroduction v1 Scope . 12 Normativ
8、e references 13 Terms and definitions . 14 Significance of the test 25 Principle 36 Apparatus . 36.1 Laboratory fume hood 36.2 Conditioning room or chamber 36.3 Specimen holder 36.4 Marker rods . 76.5 Gas burner . 76.6 Fuel gas 76.7 Manometer and gas flow meter 76.8 Timing device . 76.9 Measuring sc
9、ale 76.10 Marker (permanent) 86.11 Micrometer . 87 Test specimens 87.1 Extended application . 87.2 Preparation of test specimens . 88 Procedure. 99 Calculation and expression of results 1110 Test report 11Annex A (informative) Precision data 12Bibliography .13 ISO 2017 All rights reserved iiiContent
10、s PageBS ISO 12992:2017ISO 12992:2017(E)ForewordISO (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 bod
11、y 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 Electrote
12、chnical 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
13、 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 r
14、esponsible 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
15、 given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers
16、to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .htmlThis document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 4, Burning behaviour.This second edition cancels and replaces the first edition (ISO 12992:1995), which has been technically revised.The main
17、 changes compared to the previous edition are as follows: Clause 2 has been updated; Clause 3 has been updated; the precision data have been moved to Annex A.iv ISO 2017 All rights reservedBS ISO 12992:2017ISO 12992:2017(E)IntroductionThin flexible plastic films and sheets are widely used in product
18、s for packaging, building, housing, industries and transport media, in various applications. The burning behaviour, in particular, the vertical flame spread of flexible plastic films and sheet, is a concern for fire safety of these applications. This document gives a method of determination of verti
19、cal flame spread of flexible plastic films and sheets by small flame source.This document is also intended as a pre-selection test for materials used for parts in devices and appliances. The final acceptance of the material would be dependent upon its use in complete equipment that conforms with the
20、 standards applicable to such equipment.It should be noted that the test results obtained alone by the test specified in this document cannot give whole aspects of fire hazard of plastics films and sheets. ISO 2017 All rights reserved vBS ISO 12992:2017BS ISO 12992:2017Plastics Vertical flame spread
21、 determination for film and sheet1 ScopeThis document specifies a test method for measurement of flame spread properties of vertically oriented specimens of plastics in the form of film and sheet, 3 mm or less thickness, subjected to a small igniting flame.2 Normative referencesThe following documen
22、ts are referred to in the text in such a way that some or all of their content constitutes requirements 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.ISO 11925-2, Reacti
23、on to fire tests Ignitability of products subjected to direct impingement of flame Part 2: Single-flame source testISO 13943, Fire safety Vocabulary3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 13943 and the following apply.ISO and IEC maintain term
24、inological databases for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1afterglowpersistence of glowing combustion after both removal of the ignition sourc
25、e and the cessation of any flaming combustionSOURCE: ISO 13943:2008, definition 4.83.2flame-spread timetime taken by a flame front on a burning material to travel a specified distance on the surface, or to cover a specified surface area under specified conditionsSOURCE: ISO 13943:2008, definition 4.
26、1443.3flaming dropletmolten material separating from a burning item and continuing to flame during a fire or fire testSOURCE: ISO 13943:2008, definition 4.1503.4seat of flameflame location at the leading edge of the affected areaNote 1 to entry: See Figure 1.INTERNATIONAL STANDARD ISO 12992:2017(E)
27、ISO 2017 All rights reserved 1BS ISO 12992:2017ISO 12992:2017(E)a) Front view Thermosets b) Front view Thermoplasticsc) Side view Thermosets d) Side view ThermoplasticsKey1 test specimen 5 test specimen cross section2 top of flame 6 burnt area3 marker line 7 shrunk area4 seat of flameFigure 1 Identi
28、fication of seat of flame4 Significance of the test4.1 Results obtained using the method described in this document can provide a sensitive measure of the burning characteristics of material under certain controlled laboratory conditions, and hence, may be useful for preselection or quality control
29、purposes.4.2 Results obtained from specimens of differing thickness, with different ignition sources and/or by different procedures are not comparable. Correlation with flammability behaviour under other fire conditions is not implied.4.3 This test is not relevant for specimens which distort away fr
30、om and out of reach of the test flame without ignition. Other test methods should be explored for such specimens.2 ISO 2017 All rights reservedBS ISO 12992:2017ISO 12992:2017(E)4.4 Results obtained by this document shall not be used alone to describe or appraise the fire hazard presented by a partic
31、ular material type or shape under actual fire conditions. The results may be used as one element of a fire risk assessment, which takes into account all the factors which are pertinent to the assessment of the fire hazard of a particular end use for the material.Precision data are given in Annex A.5
32、 Principle5.1 A defined flame from a specified ignition source is applied to film or sheet specimens that are vertically oriented, for a specified period of time.5.2 The flame-spread time (3.2) is recorded and the flame spread rate between these two markings is calculated.5.3 Other properties relati
33、ng to flame propagation, such as flaming droplets, extinguishing characteristics and afterglow, are observed and recorded.6 Apparatus6.1 Laboratory fume hoodThe laboratory fume hood shall have an inside volume of at least 0,5 m3. The chamber shall permit observation of tests in progress and shall be
34、 draught free while allowing normal thermal circulation of air past the test specimen during burning. The inside surfaces of the chamber shall be of a dark colour. When a light meter, facing towards the rear of the chamber, is positioned in place of the test specimen, the recorded light level shall
35、be less than 20 lx.For safety and convenience, this enclosure (which can be completely closed) shall be fitted with an extraction device, such as an exhaust fan, to remove products of combustion that may be toxic. The extraction device shall be turned off during the test and turned on again immediat
36、ely after the test to remove the fire effluents. A positive closing damper may be needed.NOTE The amount of oxygen available to support combustion is naturally important for the conduct of these flame tests. For tests conducted by this method when burning times are protracted, chamber sizes greater
37、than 0,5 m3can be needed to provide reproducible results.6.2 Conditioning room or chamberThe conditioning room or chamber shall be capable of being maintained at (23 2) C and (50 5) % relative humidity.6.3 Specimen holderAs described in Figure 2 to Figure 4, the specimen holder shall be capable of s
38、upporting the specimen securely in a vertical position without excessively stressing it and providing support for marker rods across the front of the specimen. ISO 2017 All rights reserved 3BS ISO 12992:2017ISO 12992:2017(E)Dimensions in millimetres with tolerance of 5 mmKey1 marker rod in front of
39、marker line 4 extruded aluminium angle (50 50 3,5)2 wing nut or cam-action clump 5 aluminium plate (450 300 6)3 specimen located between protruding screwsFigure 2 Specimen support fixture (Front view)4 ISO 2017 All rights reservedBS ISO 12992:2017ISO 12992:2017(E)Dimensions in millimetres with toler
40、ance of 5 mm not otherwise specifiedKey1 angle bracket installed with bolts, screws or rivets 4 specimen hold-down plate2 wing nut or cam-action clump 5 support frame3 specimen 6 6 mm + 1 mm aluminium plateFigure 3 Specimen support fixtures (Side view) ISO 2017 All rights reserved 5BS ISO 12992:2017
41、ISO 12992:2017(E)Dimensions in millimetres with tolerance of 5 mm not otherwise specifiedKey1 steel spring clip 3 diameter of hole to be determined by bolt or 2 3,5 mm + 0,1 mm thick aluminium plate clump sizeFigure 4 Specimen hold-down plate6 ISO 2017 All rights reservedBS ISO 12992:2017ISO 12992:2
42、017(E)Dimensions in millimetres with tolerance of 5 mm not otherwise specifiedKey1 stainless-steel rod (diameter 2 mm + 0,5 mm)Figure 5 Marker rod6.4 Marker rodsThe marker rods shall be made of stainless-steel, and have a diameter of 2,0 mm 0,5 mm as described in Figure 5.6.5 Gas burnerThe gas burne
43、r specified in ISO 11925-2 shall be used.6.6 Fuel gasThe fuel gas shall be propane of 95 % minimum purity. In order to obtain flame stability with the burner, the gas pressure should be between 10 kPa and 50 kPa.Approximate heat content, gas flow rate and line-back pressure to obtain the test flame
44、are described in Table 1.Table 1 Gas sourcesGasApproximate heat content Flow rate Line back-pressureaMJ/m3ml/min mmH2O columnPropane 94 2 62 15 25 5aThe needle valve of the burner shall be adjusted to provide the line back-pressure indicated.6.7 Manometer and gas flow meterThe manometer or pressure
45、gauge and gas flow meter shall be calibrated for the gas used and capable of reading the values shown in Table 1.6.8 Timing deviceThe timing device shall have a resolution of at least to 1 s. Two timing devices are required to conduct the test.6.9 Measuring scaleThe measuring instrument shall be gra
46、duated in millimetres to measure the length, width and thickness of the test specimen and the height of the test flame. ISO 2017 All rights reserved 7BS ISO 12992:2017ISO 12992:2017(E)6.10 Marker (permanent)The marker to make marking lines on the specimens should have a fine point and use quick dryi
47、ng ink/paint.6.11 MicrometerThe micrometer shall have a resolution of at least 0,02 mm for measuring the thickness of the specimens.7 Test specimens7.1 Extended application7.1.1 It is possible that the results of tests carried out on test specimens, taken from materials of different densities, colou
48、rs and thicknesses, will be different. For materials with properties which vary over a range, the test specimens shall be representative of the whole range.7.1.2 Test specimens with densities at the extremes of the range shall be tested and, if the test results yield the same flame test classificati
49、on, all specimens within the range shall be considered representative of the range. If the burning characteristics are not essentially the same, the results of the evaluation shall be considered to apply only to materials with the densities tested. Additional test specimens with intermediate densities shall be tested to determine the range of applicability.7.1.3 Uncoloured test specimens and test specimens with the highest level of organic and inorganic pigment loading shall be
