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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1822-1:1998 The Eur
2、opean Standard EN 1822-1:1998 has the status of a British Standard ICS 23.120 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW High efficiency air filters (HEPA and ULPA) Part 1: Classification, performance testing, marking This British Standard, having been prepared under the
3、direction of the Engineering Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1998 BSI 1998 ISBN 0 580 29837 X BS EN 1822-1:1998 Amendments issued since publication Amd. No.DateText affected National foreword This British Standard is the Eng
4、lish language version of EN 1822-1:1998. 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 than for air supply for IC engines and compressors, which has the responsibility to: aid enquirers
5、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 European developments and promulgate them in the UK. A list of organizations represented on this c
6、ommittee 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 Standards Catalogue under the section entitled International Standards Correspondence Index, or by
7、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 for their correct application. Compliance with a British Standard does not of itself confer immunit
8、y from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 12, an inside back cover and a back cover. CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Se
9、cretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1822-1:1998 E EUROPEAN STANDARDEN 1822-1 NORME EUROPE ENNE EUROPA ISCHE NORM April 1998 ICS 23.120 Descriptors: air filters, cleani
10、ng equipment for gases, ventilation, air conditioning, definitions, classifications, specifications, tests, aerosols, test conditions, effectiveness English version High efficiency air filters (HEPA and ULPA) Part1: Classification, performance testing, marking Filtres a air a tre s haute efficacite
11、et filtres a air a tre s faible pe ne tration (HEPA et ULPA) Partie 1: Classification, essais de performance et marquage Schwebstoffilter (HEPA und ULPA) Teil 1: Klassifikation, Leistungspru fung, Kennzeichnung This European Standard was approved by CEN on 6 March 1998. CEN members are bound to comp
12、ly 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 national standards may be obtained on application to the Central Sec
13、retariat 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 language and notified to the Central Secretariat has the same status as the off
14、icial 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, Spain, Sweden, Switzerland and United Kingdom. Page 2 EN 1822-1:1998 BSI 1998 Foreword Thi
15、s 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. It is dealing with the performance testing of high efficiency particulate air filters (HEPA) and ultra low penetration air filters (ULPA). The compl
16、ete European Standard High efficiency air filters (HEPA and ULPA) will consist of the following parts: Part 1Classification, performance testing, marking Part 2Aerosol production, measuring equipment, particle counting statistics Part 3Testing flat sheet filter media Part 4Determining leakage of fil
17、ter elements (Scan method) Part 5Determining the efficiency of filter elements As decided by CEN/TC 195, this European Standard is based on particle counting methods which actually cover most needs of different applications. The difference between this European Standard and previous national standar
18、ds lies in the technique used for the determination of the overall efficiency. Instead of mass relationships, this new technique is based on particle counting at the most penetrating particle size (MPPS; range: 0,15 to 0,30 mm). It also allows ultra low penetration air filters to be tested, which is
19、 not possible with the previous test methods because of their inadequate sensitivity. 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 October 1998, and conflicting national standards shall be with
20、drawn at the latest by October 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
21、 Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions, symbols and abbreviations3 3.1Definitions3 3.2Symbols and abbreviations4 4Classification4 4.1Groups of filters4 4.2Classes of filters4 5
22、Requirements5 5.1General5 5.2Material5 5.3Nominal air volume flow rate5 5.4Pressure difference5 5.5Filtration performance5 6Test methods5 6.1Test rigs5 6.2Test conditions5 6.3Test aerosols5 6.4Survey of test procedures5 6.5Test procedures6 7Assessment of the filter, documentation12 8Marking12 Page 3
23、 EN 1822-1:1998 BSI 1998 1 Scope This European Standard applies to high efficiency particulate 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 the nuclear and ph
24、armaceutical 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. 2 Normative references This European Standard inco
25、rporates by dated or undated reference, provisions from other publications. Theses 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 Eu
26、ropean Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1822-2, High efficiency air filters (HEPA and ULPA) Part 2: Aerosol production, measuring equipment, particle counting statistics. EN 1882-3, Hi
27、gh efficiency air filters (HEPA and ULPA) Part 3: Testing flat sheet filter media. prEN 1882-4, High efficiency air filters (HEPA and ULPA) Part 4: Determining leakage of filter elements (Scan method). prEN 1882-5, High efficiency air filters (HEPA and ULPA) Part 5: Determining the efficiency of fil
28、ter elements. EN ISO 5167-1, Measurement of fluid flow by means of pressure differential device Part 1: Orifice plates, nozzles and Venturi tubes inserted in circular cross- section conduits running full (ISO 5167-1:1991). 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of
29、this standard, the following definitions apply. 3.1.1 filter medium flat sheet filter material, unfolded 3.1.2 folded pack a pack of the filter medium formed by uniform individual folds 3.1.3 filter element (filter) a folded pack enclosed by a frame 3.1.4 penetration the ratio of the particle number
30、 concentration downstream of the filter to the concentration upstream 3.1.5 efficiency the ratio of the number of particles held back by the filter to the number of the particles impinging on the filter 3.1.6 particle size efficiency the efficiency for a specific particle diameter. The efficiency pl
31、otted as a function of the particle diameter gives the efficiency curve 3.1.7 minimum filter efficiency the minimum of the efficiency curve under given operating conditions of the filter (see 3.1.24) 3.1.8 overall efficiency the efficiency, averaged over the whole superficial face area of a filter e
32、lement under given operating conditions of the filter 3.1.9 local efficiency the efficiency at a specific point of the filter element under given operating conditions of the filter 3.1.10 nominal air volume flow rate the air volume flow rate for which the filter element to be tested is specified 3.1
33、.11 filter face area the cross-sectional area of the filter element including the frame 3.1.12 superficial face area the cross-sectional area of the filter element which is passed by the air flow 3.1.13 effective filter medium area the effective cross-sectional area of the filter medium in the filte
34、r element (without adhesive areas, struts etc.) which is passed by the air flow 3.1.14 nominal filter medium face velocity the nominal air volume flow rate divided by the effective filter medium area Page 4 EN 1822-1:1998 BSI 1998 3.1.15 leak a point in the filter element at which the local efficien
35、cy falls below a given limit value 3.1.16 particle number concentration the number of particles per unit volume of the carrier gas (air) 3.1.17 counting rate the number of counting events per unit time 3.1.18 particle size the geometrical diameter of the particles of the test aerosol 3.1.19 mean par
36、ticle diameter median value of the particle number distribution of the test aerosol 3.1.20 monodisperse an aerosol is referred to as monodisperse when the width of its distribution function, described by the geometric standard deviation, is less than sg= 1,15. Aerosols whose distribution has a geome
37、tric standard deviation between sg= 1,15 and sg= 1,5 are referred to as quasi-monodisperse 3.1.21 polydisperse an aerosol is referred to as polydisperse if its distribution shows a geometric standard deviation of sg 1,5 3.1.22 HEPA filter high efficiency particulate air filter, classes H 10 to H 14
38、(see Table 1) 3.1.23 ULPA filter ultra low penetration air filter, classes U 15 to U 17 (see Table 1) 3.1.24 most penetrating particle size (MPPS) the particle size at which the minimum of the particle size efficiency curve occurs (see 3.1.7) 3.2 Symbols and abbreviations For the purposes of this st
39、andard, the following symbols and abbreviations apply. dpParticle diameter EEfficiency PPenetration pPressure RHRelative humidity TTemperature sgGeometric standard deviation CNCCondensation nucleus counter DEHSSebacic acid-bis (2-ethyl hexyl-) ester (trivial name: di-ethyl-hexyl-sebacate) DMADiffere
40、ntial electric mobility analyser DMPSDifferential mobility particle sizer DOPPhthalic acid-bis (2-ethyl hexyl-) ester (trivial name: di-octyl-phthalate) MPPSMost penetrating particle size OPCOptical particle counter 4 Classification Filter elements are classified in groups and classes according to t
41、heir filtration performance (efficiency or penetration). 4.1 Groups of filters According to this standard, filter elements fall into one of the following groups: group H: HEPA filters; group U: ULPA filters. 4.2 Classes of filters Filter elements of group H and U are classified according to their pe
42、rformance (see 5.5). Group H filters are subdivided in five classes: H 10 H 11 H 12 H 13 H 14 Group U filters are subdivided in three classes: U 15 U 16 U 17 Page 5 EN 1822-1:1998 BSI 1998 Table 1 Classification of HEPA and ULPA filters Filter classOverall valueLocal value1) 2) Efficiency (%)Penetra
43、tion (%)Efficiency (%)Penetration (%) H 108515 H 11955 H 1299,50,5 H 1399,950,0599,750,25 H 1499,9950,00599,9750,025 U 1599,999 50,000 599,997 50,002 5 U 1699,999 950,000 0599,999 750,000 25 U 1799,999 9950,000 00599,999 90,000 1 1) See 6.5.2 and prEN 1822-4. 2) Local values lower than those given i
44、n the Table may be agreed between supplier and purchaser. 5 Requirements 5.1 General The filter element shall be designed or marked so as to prevent incorrect mounting. The filter element shall be designed so that when correctly mounted in the ventilation duct, no leak occurs at the sealing edge. If
45、, for any reason, dimensions do not allow testing of a filter under standard test conditions, assembly of two or more filters of the same type or model is permitted, provided no leaks occur in the resulting filter. 5.2 Material The filter element shall be made of suitable material to withstand norma
46、l usage and exposures to those temperatures, humidities and corrosive environments that are likely to be encountered. The filter element shall be designed so that it will withstand mechanical constraints that are likely to be encountered during normal use. Dust or fibres released from the filter med
47、ia by the air flow through the filter element shall not constitute a hazard or nuisance for the people (or devices) exposed to filtered air. 5.3 Nominal air volume flow rate The filter element shall be tested at its nominal air volume flow rate for which the filter has been designed by the manufactu
48、rer. 5.4 Pressure difference The pressure difference across the filter element is recorded at the norminal air volume flow rate. 5.5 Filtration performance The filtration performance is expressed by the efficiency or penetration. After testing in accordance with clause 6, filter elements are classif
49、ied according to Table 1. 6 Test methods 6.1 Test rigs The test rigs are described in detail in EN 1822-3, prEN 1822-4 and prEN 1822-5. The individual methods of measurement and the measuring instruments are described in EN 1822-2. 6.2 Test conditions The air in the test channel used for testing shall comply with the following requirements: Temperature: 23 8C5 8C Relative humidity 75 % The temperature and relative humidity shall remain constant over a longer period of time. The cleanliness of the test air
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