1、Plastics Determination of burning behaviour by oxygen indexPart 3: Elevated-temperature testBS EN ISO 4589-3:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN ISO 4589-3:2017. It is identical to
2、ISO 4589-3:2017. It supersedes BS EN ISO 4589-3:1996, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/26, Burning behaviour of plastics and rubbers.A list of organizations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.Th
3、is publication does not purport to include all 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 89320 9ICS 83.080.01; 13.220.40Compliance with a British Standard can
4、not confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 4589-3:2017EUROPEAN STANDARDNORME EUROPENNEEUROP
5、ISCHE NORMEN ISO 45893May 2017ICS 13.220.40; 83.080.01 Supersedes EN ISO 4589-3:1996EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCENCENELEC Management Centre: Avenue Marnix 17, B1000 Brussels 2017 CEN Ref. No. EN ISO 4589-3:2017: EAll rights of ex
6、ploitation in any form and by any means reserved worldwide for CEN national MembersPlastics - Determination of burning behaviour by oxygen index - Part 3: Elevated-temperature test (ISO 4589-3:2017) Plastiques - Dtermination du comportement au feu au moyen de lindice doxygne - Partie 3: Essai haute
7、temprature (ISO 4589-3:2017) Kunststoffe - Bestimmung des Brennverhaltens durch den Sauerstoff-Index - Teil 3: Prfung bei erhhter Temperatur (ISO 4589-3:2017) This European Standard was approved by CEN on 20 March 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which s
8、tipulate 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 Europea
9、n 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 th
10、e national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romani
11、a, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 45893:2017 (E)European forewordThis document (EN ISO 4589-3:2017) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics” t
12、he secretariat of which is held by NBN.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 November 2017 and conflicting national standards shall be withdrawn at the latest by November 2017.Attention
13、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 4589-3:1996.According to the CEN-CENELEC Internal Regulations, th
14、e 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, Hungary, Iceland, Ireland, Italy, Latvi
15、a, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 4589-3:2017 has been approved by CEN as EN ISO 4589-3:2017 without any modification.iiBS EN ISO 458
16、9-3:2017ISO 45893:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 25 Apparatus . 25.1 Arrangement . 25.2 Test chimney . 25.3 Test specimen holder. 35.4 Gas supplies . 35.5 Gas control devices 35.6 Oxygen analyser . 35.7 Flame igniter . 45.8 T
17、iming device . 45.9 Fume extraction system 46 Calibration and maintenance of equipment 47 Preparation of test specimens 47.1 Sampling . 47.2 Test specimen dimensions and preparation . 47.3 Marking of test pieces . 47.4 Conditioning 48 Procedure. 58.1 Setting up the apparatus and test specimen . 58.2
18、 Igniting the test specimen . 58.3 Assessing burning behaviour . 58.4 Selecting successive volume fractions of oxygen 58.5 Determining the preliminary volume fraction of oxygen . 58.6 Volume fraction of oxygen changes . 69 Calculations and expression of results 610 Comparison with a specified minimu
19、m value of the temperature index at a specified temperature (short procedure) 611 Precision . 612 Test report . 6Annex A (normative) Measurement of flammability temperature (FT).12Annex B (informative) Interlaboratory test data on flammability temperature .15Annex C (informative) Typical test result
20、s sheet 16Bibliography .19 ISO 2017 All rights reserved iiiContents PageBS EN ISO 4589-3:2017ISO 45893:2017(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
21、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
22、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
23、 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 do
24、cument 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.
25、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 on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as informati
26、on about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 4, Burning behaviour.This second edition cance
27、ls and replaces the first edition (ISO 4589-3:1996), which has been technically revised.A list of all parts in the ISO 4589 series can be found on the ISO website.iv ISO 2017 All rights reservedBS EN ISO 4589-3:2017ISO 45893:2017(E)IntroductionThis document has been prepared to extend the methods av
28、ailable for the determination of flammability by oxygen index (OI) (see ISO 4589-2) to typical elevated temperatures to which a plastic material can be exposed in a service situation. It also provides a method for determining the temperature at which combustion of a small bar of material is just sup
29、ported in air under certain test conditions; the resulting temperature is termed the flammability temperature.This document is intended to be used in conjunction with ISO 4589-2 which describes the basic OI test method.Results obtained in accordance with this document are not applicable to describe
30、or appraise the fire hazard presented by a particular material or shape under actual fire conditions, unless used as one element of a fire risk assessment which takes into account all of the factors which are pertinent to the assessment of the fire hazard of a particular application for the material
31、. ISO 2017 All rights reserved vBS EN ISO 4589-3:2017This page deliberately left blankPlastics Determination of burning behaviour by oxygen index Part : Elevatedtemperature test1 ScopeThis document specifies methods for determining the minimum volume fraction of oxygen, in a mixture with nitrogen, t
32、hat will support combustion of small vertical test specimens under specified test conditions over a range of temperatures between 25 C and 150 C. The range of temperatures is typically between 40 C and 150 C. The results are defined as temperature index values at the test temperature, which is typic
33、al of the practical temperature that a plastic material can experience in an overheated service situation.Methods are provided for testing materials that are self-supporting at the test temperature in the form of vertical bars or sheet up to 10,5 mm thick. However, they are not applicable to form V
34、which requires a supporting frame as defined in ISO 4589-2:2017, Table 2. These methods are suitable for solid, laminated or cellular materials characterized by an apparent density 100 kg/m3or higher. The methods are also applicable to some cellular materials having an apparent density of less than
35、100 kg/m3. A method is provided for testing flexible sheet or film materials while supported vertically.This document also includes a method (see Annex A) for determining the temperature at which the OI of small vertical test specimens in air is 20,9 % under specified test conditions. The temperatur
36、e at which this occurs is defined as the flammability temperature (FT) and the method is limited to the determination of temperatures less than 400 C. The method is not applicable to materials having an OI of 5 C may be used to establish an approximate value of FT.A.5.2 Determine at least three valu
37、es for the FT of the material by carrying out the procedure from A.1.3 to A.5.1 inclusive at least three times.A.5.3 Calculate and record the FT of the material as the mean value of the three or more values determined in accordance with A.5.2. Express it as the mean value when rounded to the nearest
38、 1 C, with an exactly intermediate result being rounded downwards.A.6 Test reportThe test report shall include the following information:a) a reference to this document, i.e. ISO 4589-3; ISO 2017 All rights reserved 13BS EN ISO 4589-3:2017ISO 45893:2017(E)b) a statement that the test results relate
39、only to the behaviour of the test specimens under the conditions of this test and that these results are not to be used to infer the fire hazards of the material in other forms or under other fire conditions;c) all details necessary for identification of the material tested, including, where relevan
40、t, the type of material, its density, its previous history and the specimen orientation with respect to any anisotropy in the material or sample;d) the test specimen form (I, II, III, IV or VI) and dimensions;e) the method of specimen support, e.g. self-supporting or by use of nickel-chromium alloy
41、wire;f) the igniter used, if other than the standard propane flame;g) the flammability temperature;h) a description of any relevant ancillary characteristics or behaviour such as charring, dripping, severe shrinkage, erratic burning or afterglow;i) any deviations from the requirements of this docume
42、nt.14 ISO 2017 All rights reservedBS EN ISO 4589-3:2017ISO 45893:2017(E)Annex B (informative) Interlaboratory test data on flammability temperatureAn interlaboratory test was conducted in the UK in 1986 to assess the effect of different types of specimen support.Eight laboratories participated in th
43、e test using thermoplastic and cross-linked plastic specimens. Two specimen support holders were evaluated: one using silica rods and the other constructed of nichrome wire. A summary of the FT results are shown in Table B.1.The type of specimen support was not found to affect the results significan
44、tly. Although silica rods had been in use by some laboratories for some time without problems, most laboratories reported difficulties with this type of support and expressed a preference for a nichrome wire support.Table B.1 Summary of roundrobin resultsAll values in degrees CelsiusSpecimen support
45、Test laboratory FT1 2 3 4 5 6 7 8 AverageThermoplastic materialSilica rods 268 266 260 270 244 253 253 249 258Nichrome wire 263 276 260 260 239 260 253 248 257Crosslinked materialSilica rods 296 274 280 270Not available273 273 280 278Nichrome wire 292 262 280 270 272 275 267 260 272 ISO 2017 All rig
46、hts reserved 15BS EN ISO 4589-3:2017ISO 45893:2017(E)Annex C (informative) Typical test results sheetTest results sheet for temperature index, determined in accordance with ISO 45893Material: Temperature index volume fraction, %:Specimen form: rounded to 0,1 %Ignition procedure: A B :Conditioning pr
47、ocedure: 23 23/50 Date of test:Oxygen volume fraction increment (d): 0,2 % Laboratory no.: Test no.:Temperature of gas mixture (C):Section 1: Determination of oxygen volume fraction for one pair of “X” and “O” responses at 1 % O2 volume fraction interval (in accordance with 8.5)Oxygen volume fractio
48、n, %Burning period, sLength burnt, mmResponse (“X” or “O”)Oxygen volume fraction of the “O” response for the relevant pair (see ISO 4589-2:2017, 8.6) = % (this is the volume fraction to be used again for the first measurement in Section 2)Section 2: Determination of the temperature index (in accorda
49、nce with 8.6)Step size to be used for successive changes d in oxygen volume fraction = % initially to be 0,2 %, unless otherwise instructedNTseries measurementsNLseries measurements (ISO 4589-2:2017, 8.7.1 and 8.7.2)(ISO 4589-2:2017, 8.7.3) cfOxygen volume fraction, %Burning period, sLength burnt, mmResponse (“X” or “O”)Column (2, 3, 4 or 5): Row (1 to 16):k value from Table C.1:Hence k =16 ISO 2017 All rights reservedBS EN ISO 4589-3:2017ISO 45893:2017(E)TI = cf+ kd = % (to one decimal pla
