1、December 2016 English price group 20No 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).ICS 91.140.30!%p“2595777www.din.deD
2、IN EN ISO 16891Test methods for evaluating degradation of characteristics of cleanable filter media (ISO 16891:2016);English version EN ISO 16891:2016,English translation of DIN EN ISO 16891:2016-12Prfmethode zur Ermittlung der Abnahme der Wirksamkeit von abreinigbaren Filtermedien (ISO 16891:2016);
3、Englische Fassung EN ISO 16891:2016,Englische bersetzung von DIN EN ISO 16891:2016-12Mthodes dessais pour lvaluation de la dgradation des proprits des medias filtrants dcolmatables (ISO 16891:2016);Version anglaise EN ISO 16891:2016,Traduction anglaise de DIN EN ISO 16891:2016-12www.beuth.deDocument
4、 comprises 49 pagesDTranslation by DIN-Sprachendienst.In case of doubt, the German-language original shall be considered authoritative.12.16 DIN EN ISO 16891:2016-12 2 A comma is used as the decimal marker. National foreword This standard includes safety requirements. This document (EN ISO 16891:201
5、6) has been prepared by Technical Committee ISO/TC 142 “Cleaning equipment for air and other gases” in collaboration with Technical Committee CEN/TC 195 “Air filters for general air cleaning”. The responsible German body involved in its preparation was DIN-Normenausschuss Maschinenbau (DIN Standards
6、 Committee Mechanical Engineering), Working Committee NA 060-09-21 AA Luftfilter of Section Allgemeine Lufttechnik. Representatives of manufacturers and users of air filters, and of research and testing institutes contributed to this standard. The International Standards referred to in Clause 2 and
7、the Bibliography, and which have been taken over as European Standards have been published as the corresponding DIN EN ISO Standards with the same number. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 16891 February 2016 ICS 91.140.30 English Version Test methods for evaluating degradatio
8、n of characteristics of cleanable filter media (ISO 16891:2016) Mthodes dessais pour lvaluation de la dgradation des proprits des medias filtrants dcolmatables(ISO16891:2016) Prfmethode zur Ermittlung der Abnahme der Wirksamkeit von abreinigbaren Filtermedien(ISO16891:2016) This European Standard wa
9、s approved by CEN on 7 November 2015. 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 bibliographical references concerning such n
10、ational 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 responsibility of a CEN member into its own la
11、nguage 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, Former Yugoslav Republic of Macedonia, France, Germany, Gree
12、ce, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG C
13、EN-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 ISO 16891:2016 EForeword .4Introduction 51 Scope . 62 Normative references 63 Terms and definitions . 64 Symbols a
14、nd abbreviated terms . 95 Principle .106 Test specimen, equipment and test procedure 116.1 General 116.2 Preparation of sheets for gas exposure.126.2.1 Shape and size of tensile specimen .126.2.2 Sample sheet for exposure .126.2.3 Selection of sample sheet through air permeability measurement 136.2.
15、4 Filter media for exposure 136.3 Sample preparation .146.3.1 Exposure system .146.3.2 Heating system .166.3.3 Test gas supply system.166.3.4 Gas analyzer 166.3.5 Gas treatment device .176.4 Exposure conditions and procedures . 176.4.1 Exposure conditions 176.4.2 Exposure period and number of exposu
16、re .176.4.3 Attachment of filter sample sheets in the sample case 186.4.4 Implementation of the exposure .187 Tensile strength measurement of exposed specimen .197.1 Tensile test device . 197.2 Preparation of a tensile test specimen 197.3 Method of tensile test . 197.4 Characterization of the degrad
17、ation 208 Test report 21Annex A (informative) Causes and results of degradation of fabrics.22Annex B (informative) Possible evaluation method for characteristic change of fabrics 23Annex C (informative) Theoretical consideration of degradation mechanism .24Annex D (informative) Determination of spec
18、imen size .27Annex E (informative) Experimental setup for gas exposure.31Annex F (informative) Service temperature of filter materials 35Annex G (informative) Examples of measured data of fabric at different circumstances 36Annex H (informative) Example of test report 42Bibliography .46Contents Page
19、2European foreword .3EN ISO 16891:2016 (E) DIN EN ISO 16891:2016-12 European foreword This document (EN ISO 16891:2016) has been prepared by Technical Committee ISO/TC 142 “Cleaning equipment for air and other gases“ in collaboration with Technical Committee CEN/TC 195 “Air filters for general air c
20、leaning” the secretariat of which is held by UNI. 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 2016, and conflicting national standards shall be withdrawn at the latest by August 2016. A
21、ttention 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. According to the CEN-CENELEC Internal Regulations, the national standards organizations
22、 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, Latvia, Lithuania, Luxembourg, Malta, N
23、etherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 16891:2016 has been approved by CEN as EN ISO 16891:2016 without any modification. EN ISO 16891:2016 (E) DIN EN ISO 16891:2016-12 3 Forewor
24、dISO (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 body interested in a subject for which a technical
25、 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 Electrotechnical Commission (IEC) on all matters of elec
26、trotechnical 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 documents should be noted. This document was d
27、rafted 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 responsible for identifying any or all such patent
28、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 given for the convenience of users and does not cons
29、titute 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 WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe co
30、mmittee responsible for this document is ISO/TC 142, Cleaning equipment for air and other gases.4EN ISO 16891:2016 (E) DIN EN ISO 16891:2016-12 IntroductionThe main purpose of using cleanable filter is, of course, to separate dust particles from dirty gases. They are usually designed to be usable fo
31、r as long as two years to four years. However, it is very hard to design and/or select filter media properly, since their important characteristics of collection performance and residual pressure drop change with operation time. Physical and chemical properties of filter media, such as degradation i
32、n tensile strength, tenacity and so on, also change with time. Those changes can damage filter media and this can result in the breakage of bag filters and leakage of dust to the atmosphere. Hence the evaluation of these performances is also important for the rational design and the selection of app
33、ropriate filter media. ISO 11057:2011 has been published to meet the demand for the evaluation of filtration characteristics.Changes in physical and chemical properties of filter media are caused by many factors, such as heat, corrosive gases, and mechanical reasons like clogging weave openings and
34、increasing size of weave openings, the combination of those factors and so on (see Annex A). These changes are mostly adverse effects to filter media. Degradation proceeds very slowly, and thus, it takes a long time before recognizable and/or measurable change appears. Furthermore, the appearance of
35、 change depends on the combination of causes and fibre material. These facts are the main reason why mechanism of property changes has not been well understood despite its practical importance.1-13Hence, the characterization or evaluation methods for filter media have not been established yet1415(se
36、e Annex B).Nevertheless, there are demands for the establishment of a guideline for systematic characterization and evaluation of property change of filter media with respect to their relevant long-time operation not only from manufacturers of filter media, but also from producers and users of filte
37、r installations, especially the users treating combustion exhaust gases.To evaluate degradation of filter media in a laboratory, it is important that experiment can be done in a relatively short time period by using controllable single or a small number of variables, i.e. causes of change.Furthermor
38、e, it is important that the resulting effects are measureable. From this point of view, heat intensity is controllable by changing heating temperature and the intensity of corrosive gas is also controllable by changing gas concentration. Thus, their effect is expected to be accelerated. Of course, t
39、he effects can be evaluated by the degradation of tensile stress.Evaluation of property change of filter media by corrosive gases can be done by contacting filter media with those corrosive materials in any phases, i.e. gas, liquid and solid state. Testing by dipping filter media into a solution of
40、corrosive materials is easy and the resulting effects are expected to be obtained in a short period of time. Chinese Standard, GB/T 6719:2009 adopts this method.16 Solid state testing can be carried out by hard contact of filter media but it will take a long time and it is very hard to control the i
41、ntensity of corrosiveness.Testing under the gaseous state takes much longer than a liquid type test but the intensity of corrosiveness is controllable and it is much easier than the test under the solid state. Furthermore, test temperature and gas conditions except corrosive gas concentrations, are
42、similar to the actual operation condition of filtration, which is suitable (see Annex B). Hence, in this International Standard, test methods for evaluating degradation characteristics of cleanable unwoven filter media with synthetic fibre by heat and corrosive gases are standardized because they ar
43、e most widely used for bag filtration.The major objective of this International Standard is to specify the testing method to assess the relative change of physical performances of new and used cleanable filter media for industrial application, by exposing it in hot and/or corrosive gas conditions 17
44、18.EN ISO 16891:2016 (E) DIN EN ISO 16891:2016-12 5 1 ScopeThis International Standard specifies a standard reference test method useful to assess the relative degradation characteristics of cleanable filter media for industrial applications under standardized simulated test conditions. The main pur
45、pose of testing is to obtain the information about relative change of properties of filter media due to exposure to the simulated gas conditions for a long time. The main target of this International Standard is the property change of nonwoven fabric filters because they are frequently used under si
46、milar circumstances to the test gas conditions described in this International Standard.The results obtained from this test method are not intended for predicting the absolute properties of full scale filter facilities. However, they are helpful for the design of a bag filter and selection and devel
47、opment of appropriate cleanable filter media, and for the identification of suitable operating parameters.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for the application of this document. For dated references,
48、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 4606, Textile glass Woven fabrics Determination of tensile breaking force and elongation at breaking by strip methodISO 13934-1, Textiles Tensile properties of
49、 fabrics Part 1: Determination of maximum force and elongation at maximum force using the strip method1)ISO 29464:2011,Cleaning equipment for air and other gases Terminology3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 29464:2011 and the following apply
