1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 13.340.30 ISBN 0-626-14612-7 SANS 50141:2003 Edition 2 EN 141:2000 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Gas filte
4、rs and combined filters Requirements, testing, marking This national standard is the identical implementation of EN 141:2000 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan road groenkloof ! private bag x191 pretoria 00
5、01 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 50141:2003 Edition 2 EN 141:2000 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC 5120.11D, R
6、espiratory equipment, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. This edition cancels and replaces the first edition (SABS EN 141:1990). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 141February 2000ICS 13.340.30 Supersedes EN 14
7、1:1990English versionRespiratory protective devices - Gas filters and combined filters -Requirements, testing, markingAppareils de protection respiratoire - Filtres antigaz et filtrescombins - Exigences, essais, marquageAtemschutzgerte - Gasfilter und Kombinationsfilter -Anforderungen, Prfung, Kennz
8、eichnungThis European Standard was approved by CEN on 7 January 2000.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographica
9、l references concerning such nationalstandards 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 translationunder the responsibility of a CEN membe
10、r into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
11、 Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCentral Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nationa
12、l Members.Ref. No. EN 141:2000 EPage 2EN 141:2000ContentsForeword4Introduction.51 Scope52 Normative references .53 Definitions54 Description 55 Classification.65.1 Introduction .65.2 Types of filters.65.2.1 Gas filters.65.2.2 Multi-type gas filters .65.2.3 Combined filters65.2.4 Special filters.65.3
13、 Classes of filters .66 Designation77 Requirements 77.1 General.77.2 Nominal values and tolerances .77.3 Visual inspection.77.4 Connection 77.5 Mass .77.6 Multiple filters87.7 Material.87.8 Packaging 87.9 Mechanical strength (M.S.).87.10 Temperature conditioning (T.C.) .87.11 Breathing resistance.97
14、.12 Gas capacity 9Page 3EN 141:20007.13 Combined filters117.13.1 General.117.13.2 Filter penetration.117.14 Clogging (optional) .117.14.1 General.117.14.2 Filter penetration.117.14.3 Breathing resistance.118 Testing .128.1 General.128.2 Visual inspection.128.3 Mechanical strength (M.S.).128.3.1 Test
15、 equipment128.3.2 Test procedure 128.4 Temperature conditioning (T.C.) .148.5 Test flow conditions .148.5.1 General.148.5.2 Multiple filters148.6 Breathing resistance.148.7 Gas capacity 148.7.1 General.148.7.2 Filters Type A, B, E and K 158.7.3 Special filters.158.8 Filter penetration.159 Marking.15
16、9.1 General.159.2 Filters159.3 Special markings.169.4 Filter package 1610 Information supplied by the manufacturer.17Annex ZA (informative) Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directive .19Page 4EN 141:2000ForewordThis European Standard has be
17、en prepared by Technical Committee CEN/TC 79 “Respiratory protectivedevices“, the secretariat of which is held by DIN.This European Standard replaces EN 141:1990.This European Standard shall be given the status of a national standard, either by publication of an identical textor by endorsement, at t
18、he latest by August 2000, and conflicting national standards shall be withdrawn at thelatest by August 2000.This European Standard has been prepared under a mandate given to CEN by the European Commission andthe European Free Trade Association, and supports essential requirements of EU Directive(s).
19、For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this standard.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republi
20、c, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.Page 5EN 141:2000IntroductionA given respiratory protective device can only be approved when the individual components satisfy therequirem
21、ents of the test specification which may be a complete standard or part of a standard, and practicalperformance tests have been carried out successfully on complete apparatus where specified in the appropriatestandard. If for any reason a complete apparatus is not tested then simulation of the appar
22、atus is permittedprovided the respiratory characteristics and weight distribution are similar to those of the complete apparatus.1 ScopeThis European Standard specifies gas filters and combined filters for use as components in unassisted respiratoryprotective devices. AX filters against low boiling
23、organic compounds, SX filters against specific named compoundsand CO filters are excluded.Laboratory tests are included for the assessment of compliance with the requirements.Some filters complying with this standard may also be suitable for use with other types of respiratory protectivedevices and
24、if so shall be tested and marked according to the appropriate European Standard.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text and the publications
25、are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies.EN 132 Respiratory prote
26、ctive devices - Definitions of terms and pictogramsEN 134 Respiratory protective devices - Nomenclature of componentsEN 143 Respiratory protective devices - Particle Filters - Requirements, testing, markingEN 148-1 Respiratory protective devices - Threads for facepieces - Part 1: Standard thread con
27、nectionEN 371 Respiratory protective devices - AX gas filters and combined filters against low boiling organiccompounds - Requirements, testing, markingEN 372 Respiratory protective devices - SX gas filters and combined filters against specific namedcompounds - Requirements, testing, marking3 Defini
28、tionsFor the purposes of this European Standard the definitions in EN 132 and the nomenclature given in EN 134apply.4 DescriptionAir enters the gas or combined filter(s) and passes to the facepiece after removal of gases and vapours or gases,vapours and particles.Page 6EN 141:20005 Classification5.1
29、 IntroductionGas and combined filters are classified in types and classes according to their application and gas capacity.5.2 Types of filters5.2.1 Gas filtersGas filters are produced in one of the following types:Types A, B, E and KType A For use against certain organic gases and vapours with a boi
30、ling point higher than 65 C asspecified by the manufacturer.Type B For use against certain inorganic gases and vapours as specified by the manufacturer (excludinge.g. carbon monoxide).Type E For use against sulphur dioxide and other acidic gases and vapours as specified by themanufacturer.Type K For
31、 use against ammonia and organic ammonia derivatives as specified by the manufacturer.5.2.2 Multi-type gas filtersFilters which are a combination of two or more of the above types and which meet the requirements of each typeseparately.5.2.3 Combined filtersGas or multi-type gas filters incorporating
32、 a particle filter.5.2.4 Special filtersSpecial filters are:Type NO-P3: For use against nitrogen oxides, e.g. NO, NO2, NOX.Type Hg-P3: For use against mercury.These filters shall always incorporate a P3 filter according to EN 143.5.3 Classes of filtersGas filters of types A, B, E and K are classifie
33、d in terms of capacity as follows:Class 1 Low capacity filtersClass 2 Medium capacity filtersClass 3 High capacity filtersThe protection provided by a class 2 or class 3 filter includes that provided by the corresponding filter of lowerclass or classes.The classification of combined filter(s) includ
34、es that of particle filter(s) according to EN 143.Special filters are not classified.Page 7EN 141:20006 DesignationGas filters and combined filters meeting the requirements of this standard shall be designated in the followingmanner:gas filter EN 141, filter type, classcombined filter EN 141 filter
35、type, class, optione.g. gas filter EN 141 A2gas filter EN 141 A1B2combined filter EN 141 A2P3combined filter EN 141 A2B2E2K2P3D or ABEK2P3DNOTE If the class of each gas filter type of a multi-type gas filter is the same, the above shortened designationis permissible. If the classes are not the same,
36、 the designation shall be written to show the class of each type.7 Requirements7.1 GeneralIn all tests, all test samples shall meet the requirements.7.2 Nominal values and tolerancesUnless otherwise specified, the values stated in this standard are expressed as nominal values. Except fortemperature
37、limits, values which are not stated as maximum or minimum shall be subject to a tolerance of 5 %.Unless otherwise specified, the ambient temperature for testing shall generally be (24 8) C but for themechanical tests (20 10) C, and the temperature limits shall be subject to an accuracy of 1 C.7.3 Vi
38、sual inspectionThe visual inspection shall be carried out prior to laboratory tests and as specified elsewhere in this standard.Testing shall be done in accordance with 8.2.7.4 ConnectionThe connection between filter(s) and facepiece or other device(s) with which it is intended to be used shall bero
39、bust and leaktight.The connection between filter and facepiece may be achieved by a permanent or special connector or a screwthread including a thread conforming to EN 148-1.Threads conforming to EN 148-2 or EN 148-3 shall not be used.If the filter is designated to be used on a multiple filter facep
40、iece or has any other thread, it shall not be possible toconnect it to a thread conforming to EN 148-1, EN 148-2 or EN 148-3.The filter shall be readily replaceable without use of special tools and shall be designed or marked to preventincorrect assembly.The particle filter of combined filters shall
41、 be on the influent side of the gas filter.Testing shall be done in accordance with 8.2.7.5 MassThe maximum mass of filter(s) designated to be used directly connected to a half mask is 300 g.The maximum mass of filter(s) designated to be used directly connected to a full face mask is 500 g.Page 8EN
42、141:2000Testing shall be done in accordance with 8.1.7.6 Multiple filtersWhere filtering devices are designed to use more than one filter (i.e. multiple filter device), through which the flowis proportioned, all requirements given in this European standard are to be met by the complete set of filter
43、s (e.g.the total mass of a filter set designated to be used directly connected to a half mask shall not exceed 300 g).If, however, it is possible that a single filter of a multiple filter device may be used alone, then the requirements ofthe full flow rate for the tests, as stated in this European s
44、tandard, shall be met.In the information supplied by the manufacturer all necessary information on how to use multiple filters shall begiven.Testing shall be done in accordance with 8.1 and 8.2.7.7 MaterialThe filter shall be made of suitable material to withstand normal usage and exposures to those
45、 temperatures,humidity and corrosive environments that are likely to be encountered. Internally it shall withstand corrosion by thefiltering media.Any material of the filter media or any gaseous products that may be released by the air flow through the filtershall not be known to constitute a hazard
46、 or nuisance for the wearer.Testing shall be done in accordance with 8.2.7.8 PackagingFilters shall be offered for sale packaged in such a way that they are protected against mechanical damage orvisual contamination before use.Where appropriate, filters shall be factory sealed to protect the filter
47、media against environmental influences andin such a way that the breaking of the factory sealing can be identified.Testing shall be done in accordance with 8.2.7.9 Mechanical strength (M.S.)Filters shall be subjected to the mechanical strength test when required by the relevant clauses of this stand
48、ard.Testing shall be done in accordance with 8.3.After this treatment the filters shall show no mechanical defect and shall meet the requirement of the relevantclauses.Testing shall be done in accordance with 8.2.7.10 Temperature conditioning (T.C.)Filters shall be subjected to the temperature condi
49、tioning test when required by the relevant clauses of thisstandard.Testing shall be done in accordance with 8.4.After the treatment the filters shall show no signs of damage and shall meet the requirement of the relevantclauses.Testing shall be done in accordance with 8.2.Page 9EN 141:20007.11 Breathing resistanceThe resistance imposed by filter(s) to the flow of air shall be as low as possible and in no case exceed the valuesshown in table 1.Four filters shall be tested, two after the test for mechanical strength according to 8.3 and two after the test formechanical stren
