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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1822-5:2000 The Eur
2、opean Standard EN 1822-5:2000 has the status of a British Standard ICS 23.120 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW High efficiency particulate air filters (HEPA and ULPA) Part 5: Determining the efficiency of filter element Licensed copy:PONTYPRIDD COLLEGE, 05/07/20
3、07, Uncontrolled Copy, BSI This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 October 2000 BSI 10-2000 ISBN 0 580 36457 7 BS EN 1822-5:2000 Amendments issued sin
4、ce publication Amd. No.DateComments National foreword This British Standard is the official English language version of EN 1822-5:2000. The UK participation in its preparation was entrusted by Technical Committee MCE/21, Filters for gases and liquids, to Subcommittee MCE/21/3, Air filters other then
5、 for air supply to IC engines and compressors, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Euro
6、pean developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI St
7、andards Catalogue under the section entitled International Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible fo
8、r their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 20, an inside back cover and a back cover. The BSI copyright notice
9、displayed in this document indicates when the document was last issued. Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled Copy, BSI 标准分享网 w w w .b z f x w .c o m 免费下载 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1822-5 August 2000 ICS 23.120 English version High efficiency particula
10、te air filters (HEPA and ULPA) - Part 5: Determining the efficiency of filter element Filtres air trs haute efficacit et filtres air trs faible pntration (HEPA et ULPA) - Partie 5: Mesure de lefficacit de llment filtrant Schwebstoffilter (HEPA und ULPA) - Teil 5: Abscheidegradprfung des Filterelemen
11、tes This European Standard was approved by CEN on 7 July 2000. 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 ref
12、erences concerning such national standards may be obtained on application to the Central Secretariat 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
13、into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal
14、, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN na
15、tional Members. Ref. No. EN 1822-5:2000 E Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled Copy, BSI Page 2 EN 1822-5:2000 Contents Page Foreword3 Introduction.3 1Scope.4 2Normative references4 3Terms and definitions.4 3.1 sampling volume flow rate.4 3.2 sampling duration.4 3.3 measuring p
16、rocedure with fixed sampling probes.5 3.4 total particle count method5 3.5 particle counting and sizing method .5 4Description of the method5 4.1 Measurement method using fixed sampling probe6 4.2 Scan method 6 5Test filter6 6Test apparatus.7 6.1 Test duct.7 6.2 Aerosol generation and measuring inst
17、ruments 9 7Test air.15 8Test procedure.15 8.1 Preparatory checks.15 8.2 Starting up the aerosol generator15 8.3 Preparation of the test filter.15 8.4 Testing16 9Evaluation17 10Test report .18 11Maintenance and inspection of the test apparatus 20 Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontro
18、lled Copy, BSI 标准分享网 w w w .b z f x w .c o m 免费下载 Page 3 EN 1822-5:2000 Foreword This European Standard has been prepared by Technical Committee CEN/TC 195 “Air filters for general air cleaning“, the secretariat of which is held by DIN. This European Standard shall be given the status of a national
19、standard, either by publication of an identical text or by endorsement, at the latest by February 2001, and conflicting national standards shall be withdrawn at the latest by February 2001. It contains requirements, fundamental principles of testing and the marking for high efficiency particulate ai
20、r filters (HEPA) and ultra low penetration air filters (ULPA). The complete European Standard “High efficiency particulate air filters (HEPA and ULPA)“ will consist of the following parts: Part 1Classification, performance testing, marking Part 2Aerosol production, measuring equipment, particle coun
21、ting statistics Part 3Testing flat sheet filter media Part 4Determining leakage of filter element (Scan method) Part 5 Determining the efficiency of filter element According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implemen
22、t this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Introduction As decided by CEN/TC 195, this European Standard is based on part
23、icle counting methods which actually cover most needs of different applications. The difference between this European Standard and previous national standards lies in the technique used for the determination of the overall efficiency. Instead of mass relationships, this new technique is based on par
24、ticle counting at the most penetrating particle size (MPPS; range: 0,15m to 0,30 m). It also allows ultra low penetration air filters to be tested, which is not possible with the previous test methods because of their inadequate sensitivity. Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled
25、 Copy, BSI Page 4 EN 1822-5:2000 1Scope This European Standard applies to high efficiency particulate air filters and ultra low penetration air filters (HEPA and ULPA) used in the field of ventilation and air conditioning and for technical processes, e.g. for clean room technology or applications in
26、 the nuclear and pharmaceutical industry. It establishes a procedure for the determination of the efficiency on the basis of a particle counting method using a liquid test aerosol, and allows a standardized classification of these filters in terms of their efficiency. Part 5 of the standard deals wi
27、th measuring the efficiency of filter elements, specifying the conditions and procedures for carrying out tests, describing a specimen test apparatus and its components, and including the method for evaluating the test results. 2Normative references This European Standard incorporates by dated or un
28、dated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references subsequent amendments to, or revisions of, any of these publications apply to this standard only when incorp
29、orated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 1822-1:1998High efficiency particulate air filters (HEPA and ULPA) - Part 1: Classification, performance testing, marking EN 1822-2:1998High efficiency p
30、articulate air filters (HEPA and ULPA) - Part 2: Aerosol production, measuring equipment, particle counting statistics EN 1822-3High efficiency particulate air filters (HEPA and ULPA) - Part 3: Testing flat sheet filter media EN ISO 5167-1Measurement of fluid flow by means of pressure differential d
31、evice; Part 1: Orifice plates, nozzles and Venturi tubes inserted in circular cross-section conduits running full (ISO 5167-1:1991) 3Terms and definitions For the purposes of this European Standard, the following terms and definitions apply. Further terms and definitions which also apply for the app
32、lication of this part of EN 1822 are to be found in EN 1822-1 and in EN 1822-2. 3.1 sampling volume flow rate the volume flow rate of sample air passing to the measuring cell of the particle counter used to determine the upstream or downstream particle count. 3.2 sampling duration the time during wh
33、ich the particles in the sampling volume flow are counted (upstream or downstream) Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled Copy, BSI 标准分享网 w w w .b z f x w .c o m 免费下载 Page 5 EN 1822-5:2000 3.3 measuring procedure with fixed sampling probes determination of the overall efficiency
34、using fixed sampling probes upstream and downstream of the test filter. 3.4 total particle count method a particle counting method in which the overall number of particles - without size classification - can be determined in a certain test volume (e.g. by using a condensation nucleus counter) 3.5 pa
35、rticle counting and sizing method a particle counting method which can determine both the number of particles and also their size distribution (e.g. by using an optical particle counter). 4Description of the method In order to determine the efficiency of the test filter it is fixed in the test filte
36、r 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 and the test aerosol produced by the aerosol generator is mixed with the prepared test air
37、 along a mixing section, so that it is spread homogeneously over the cross section of the duct. The efficiency is always determined for the most penetrating particle size (MPPS) (see EN 1822- 3). The size distribution of the aerosol particles can optionally be measured using a particle size analysis
38、 system (for example a differential mobility particle sizer, DMPS). The testing can be carried out using either a monodisperse or polydisperse test aerosol. When testing with (quasi-) monodisperse aerosol the total particle counting method can be used with a condensation nucleus counter (CNC) or an
39、optical particle counter (OPC; for example a laser particle counter). It shall be ensured that the number median particle diameter corresponds to the MPPS particle diameter at which the filter medium has its minimum efficiency. When using a polydisperse aerosol, an optical particle counter shall be
40、used, which in addition to counting the particles is also able to determine their size distribution. It shall be ensured that the median diameter of the test aerosol lies in the range between 2 MPPS and MPPS x 1,5. In order to determine the overall efficiency, representative partial flows are extrac
41、ted on the upstream and downstream sides of the filter element and led to the attached particle counter to measure the number of particles. The overall efficiency can be determined using one of two methods, either Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled Copy, BSI Page 6 EN 1822-5:
42、2000 - with fixed test sampling probes (see 4.1) or - with one or several movable sampling probes downstream (scan method) (see 4.2) In both methods the sample upstream is taken using a fixed sampling probe. The upstream and downstream number concentrations and the overall efficiency are calculated
43、from the particle count, the duration of the sampling and the sampling volume flow rate. 4.1 Measurement method using fixed sampling probe Using this method, the downstream sample used to determine the overall efficiency is taken using a fixed sampling probe. It is necessary to have a mixing section
44、 behind the test filter to mix the aerosol homogeneously with the test air over the duct cross section (see 6.1.4). 4.2 Scan method This overall efficiency can be determined by averaging the readings from the result of the leak test (scan method). The test rig for the scan method is described in Par
45、t 4 of this standard. In the scan method the downstream sampling is carried out directly behind the test filter using one or several moveable sampling probes, which can traverse the entire cross sectional area of the filter and its frame in overlapping tracks without any gaps. The test apparatus cor
46、responds largely with that used with stationary sampling probes. The difference for the scanning method is that the downstream mixing section is not included and that a 3-dimensional tracking system is included downstream to move the probe(s). Since the test duct is usually open for this reason, pro
47、visions shall be made to prevent the inleakage of contaminated outside air into the test air flow. The arrangement of this test apparatus is described in Part 4 of this standard. In the scan method all the particles counted during the entire downstream scan in the course of the leak testing are adde
48、d together. The duration of the sampling is derived from the data of the scanning and the number of probes. The further clauses of this standard refer solely to the measuring method with fixed sampling probes where the overall efficiency is determined independently from the leak test procedure. 5Tes
49、t filter The filter element to be tested shall show no signs of damage or any other irregularities. The filter element shall be handled carefully and shall be clearly and permanently marked with the following details: a) Designation of the filter element b) Upstream side of the filter element The temperature of the test filter during the testing shall correspond with that of the test air. Licensed copy:PONTYPRIDD COLLEGE, 05/07/2007, Uncontrolled Copy, BSI 标准分享网 w w w .b z f x w .c o m 免费下载 Page 7 EN 1822-5:2000 6Test apparatus A flow