1、 Reference number ISO 29463-5:2011(E) ISO 2011INTERNATIONAL STANDARD ISO 29463-5 First edition 2011-10-15 High-efficiency filters and filter media for removing particles in air Part 5: Test method for filter elements Filtres haut rendement et filtres pour llimination des particules dans lair Partie
2、5: Mthode dessai des lments filtrants ISO 29463-5:2011(E) COPYRIGHT PROTECTED DOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, with
3、out permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2011 All rig
4、hts reservedISO 29463-5:2011(E) ISO 2011 All rights reserved iiiContents Page Foreword iv Introduction . v 1 Scope 1 2 Normative references 1 3 Terms and definitions . 2 4 Description of the method 2 4.1 Alternate efficiency test method for groups H and U filters . 3 4.2 Statistical efficiency test
5、method for low efficiency filters Group E filters 3 5 Test filter 3 6 Test apparatus . 4 6.1 Test duct . 4 6.2 Aerosol generation and measuring instruments . 6 7 Conditions of the test air 10 8 Test procedure . 11 8.1 Preparatory checks . 11 8.2 Starting up the aerosol generator 11 8.3 Preparation o
6、f the test filter . 11 8.4 Testing 11 9 Evaluation 12 10 Test report 13 11 Maintenance and inspection of the test apparatus 15 Annex A (normative) Alternate efficiency test method from scan testing 16 Annex B (informative) Testing and classification method for filters with MPPS 0,1 m (e.g. membrane
7、medium filters) . 17 Annex C (normative) Testing and classification of filters using media with (charged) synthetic fibres . 20 Annex D (informative) Traditional efficiency test methods for HEPA and ULPA filters 22 Bibliography 23 ISO 29463-5:2011(E) iv ISO 2011 All rights reservedForeword ISO (the
8、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 committee
9、 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 electrotechnic
10、al standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bo
11、dies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 an
12、y or all such patent rights. ISO 29463-5 was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other gases. ISO 29463 consists of the following parts, under the general title High-efficiency filters and filter media for removing particles in air: Part 1: Classification, perf
13、ormance, testing and marking Part 2: Aerosol production, measuring equipment, particle-counting statistics Part 3: Testing flat sheet filter media Part 4: Test method for determining leakage of filter element Scan method Part 5: Test method for filter elements ISO 29463-5:2011(E) ISO 2011 All rights
14、 reserved vIntroduction ISO 29463 (all parts) is derived from EN 1822 (all parts) with extensive changes to meet the requests from non-EU p-members. It contains requirements, fundamental principles of testing and the marking for high- efficiency particulate air filters with efficiencies from 95 % to
15、 99,999 995 % that can be used for classifying filters in general or for specific use by agreement between users and suppliers. ISO 29463 (all parts) establishes a procedure for the determination of the efficiency of all filters on the basis of a particle counting method using a liquid (or alternati
16、vely a solid) test aerosol, and allows a standardized classification of these filters in terms of their efficiency, both local and overall efficiency, which actually covers most requirements of different applications. The difference between ISO 29463 (all parts) and other national standards lies in
17、the technique used for the determination of the overall efficiency. Instead of mass relationships or total concentrations, this technique is based on particle counting at the most penetrating particle size (MPPS), which is, for micro-glass filter mediums, usually in the range of 0,12 m to 0,25 m. Th
18、is method also allows testing ultra-low-penetration air filters, which was not possible with the previous test methods because of their inadequate sensitivity. For membrane filter media, separate rules apply, and are described in Annex B. Although no equivalent test procedures for testing filters wi
19、th charged media is prescribed, a method for dealing with these types of filters is described in Annex C. Specific requirements for testing method, frequency, and reporting requirements can be modified by agreement between supplier and customer. For lower-efficiency filters (group H, as described be
20、low), alternate leak test methods described in ISO 29463-4:2011, Annex A, can be used by specific agreement between users and suppliers, but only if the use of these other methods is clearly designated in the filter markings as noted in ISO 29463-4:2011, Annex A. There are differences between ISO 29
21、463 (all parts) and other normative practices common in several countries. For example, many of these rely on total aerosol concentrations rather than individual particles. For information, a brief summary of these methods and their reference standards are provided in Annex D of this part of ISO 294
22、63. INTERNATIONAL STANDARD ISO 29463-5:2011(E) ISO 2011 All rights reserved 1High-efficiency filters and filter media for removing particles in air Part 5: Test method for filter elements 1 Scope This part of ISO 29463 specifies the reference test procedure for determining the efficiency of filters
23、at their most penetrating particle size (MPPS). It also gives guidelines for the testing and classification for filters with an MPPS of less than 0,1 m (Annex B) and filters using media with (charged) synthetic fibres (Annex C). It is intended for use in conjunction with ISO 29463-1, ISO 29463-2, IS
24、O 29463-3 and ISO 29463-4. 2 Normative references The following referenced documents are indispensable for the application 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.
25、 ISO 5167-1, Measurement of fluid flow by means of pressure differential devices inserted in circular cross- section conduits running full Part 1: General principles and requirements ISO/TS 21220:2009, Particulate air filters for general ventilation Determination of filtration performance ISO 21501-
26、4, Determination of particle size distribution Single particle light interaction methods Part 4: Light scattering airborne particle counter for clean spaces ISO 29463-1:2011, High-efficiency filters and filter media for removing particles in air Part 1: Classification, performance, testing and marki
27、ng ISO 29463-2:2011, High-efficiency filters and filter media for removing particles in air Part 2: Aerosol production, measuring equipment, particle-counting statistics ISO 29463-3, High-efficiency filters and filter media for removing particles in air Part 3: Testing flat sheet filter media ISO 29
28、463-4:2011, High-efficiency filters and filter media for removing particles in air Part 4: Test method for determining the leakage of filter elements Scan method ISO 29464 1) , Cleaning equipment for air and other gases Terminology 1) To be published. ISO 29463-5:2011(E) 2 ISO 2011 All rights reserv
29、ed3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 29463-1, ISO 29463-2, ISO 29463-3, ISO 29463-4, ISO 29464 and the following apply. 3.1 sampling duration time during which the particles in the sampling volume flow are counted (upstream or downstream
30、) 3.2 measuring procedure with fixed sampling probes determination of the overall efficiency using fixed sampling probes upstream and downstream of the test filter 3.3 total particle count method particle counting method in which the total number of particles in a certain sample volume is determined
31、 without classification according to size EXAMPLE By using a condensation particle counter. 3.4 particle counting and sizing method particle counting method which allows both the determination of the number of particles and also the classification of the particles according to size EXAMPLE By using
32、an optical particle counter. 3.5 particle concentration method method that can determine the total concentration of particles in the aerosol either by multiple particle counting or chemical concentrations NOTE No particle size classification can be determined by this method. 4 Description of the met
33、hod In order to determine the efficiency of the test filter, it is fixed in the test filter mounting assembly and subjected to a test air volume flow corresponding to the nominal volume flow rate. After measuring the pressure drop at the nominal volume flow rate, the filter is purged with clean air
34、and the test aerosol produced by the aerosol generator is mixed with the prepared test air along a mixing section, so that it is spread homogeneously over the cross-section of the duct. The efficiency is always determined for the MPPS; see ISO 29463-3. The size distribution of the aerosol particles
35、can optionally be measured using a particle size analysis system, for example, a differential mobility particle sizer, DMPS. The testing can be carried out using either a mono-disperse or poly-disperse test aerosol. When testing with (quasi-) mono-disperse aerosol, the total particle counting method
36、 may be used with a condensation particle counter (CPC) or an optical particle counter (OPC; for example a laser particle counter). It shall be ensured that the number median particle diameter corresponds to the MPPS, i.e. the particle diameter at which the filter medium has its minimum efficiency.
37、ISO 29463-5:2011(E) ISO 2011 All rights reserved 3When using a poly-disperse aerosol, the particle counting method, e.g. an optical particle counter or DMPS, shall be used, which, in addition to counting the particles, is also able to determine their size distribution. It shall be ensured that the c
38、ount median diameter, D M , of the test aerosol lies in the range given by Equation (1): MPPS M MPPS 1, 5 2 S DS (1) where S MPPSis the most penetrating particle size. In order to determine the overall efficiency, representative partial flows are extracted on the upstream and downstream sides of the
39、 filter element and directed to the attached particle counter via a fixed sampling probe to measure the number of particles. It is necessary to have a mixing section behind the test filter to mix the aerosol homogeneously with the test air over the duct cross-section (see 6.1.4). 4.1 Alternate effic
40、iency test method for groups H and U filters The standard efficiency test method, as described above, uses downstream mixing and a fixed downstream probe. However, an alternate efficiency test method using scan test equipment with moving probe(s) is provided and described in Annex A. 4.2 Statistical
41、 efficiency test method for low efficiency filters Group E filters For filters of group E, the overall efficiency shall be determined by one of the statistical test procedures described below and it is not necessary to carry out the test for each single filter element (as is mandatory for filters of
42、 groups H and U). The overall efficiency of group E filters shall be determined by averaging the results of the statistical leak test as described below. A record of the filter data in the form of a type test certificate or alternatively a factory test certificate is required. However, the supplier
43、shall be able to provide documentary evidence to verify the published filter data upon request. This can be done by either: a) maintaining a certified quality management system (e.g. ISO 9000), which requires the application of statistically based methods for testing and documenting efficiency for g
44、roup E filters in accordance with this part of ISO 29463; or b) using accepted statistical methods to test all of production lots of filters. The skip lot procedure as described in ISO 2859-1 or any equivalent alternative method may be used. The skip lot procedure as described in ISO 2859-1 implies
45、that at the beginning, the test frequency is high and is, in the course of further testing, reduced as the production experience grows and the products produced conform to the target. For example, for the first eight production lots, 100 % of the produced filters are tested. If all the tests are pos
46、itive, the frequency is reduced to half for the next eight production lots. If all the tests are positive again, the number is reduced by half again, and so on until it is necessary to test only one out of eight lots (e.g. the minimum test frequency). Each time one of the tested filters fails, the t
47、est frequency is doubled again. In any case, the number of samples per lot tested shall be greater than three filters. 5 Test filter The filter element being tested shall show no signs of damage or any other irregularities. The filter element shall be handled carefully and shall be clearly and perma
48、nently marked with the following details: designation of the filter element; upstream side of the filter element. The temperature of the test filter during the testing shall correspond with that of the test air. ISO 29463-5:2011(E) 4 ISO 2011 All rights reserved6 Test apparatus A flow sheet showing
49、the arrangement of apparatus comprising a test rig is given in ISO 29463-1:2011, Figure 4. An outline diagram of a test rig is given in Figure 1. The fundamentals of aerosol generation and neutralization with details of suitable types of equipment as well as detailed descriptions of the measuring instruments required for the testing are given in ISO 29463-2. Key 1 coarse dust filter 2 fine dust filter 3 fan 4 air heating 5 high-efficiency air filter 6 aerosol inlet to the test duct 7 temperatu
