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 0-626-14671-2 SANS 50405:2003 Edition 2 EN 405:2001 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Valved fi
4、ltering half masks to protect against gases or gases and particles Requirements, testing, marking This national standard is the identical implementation of EN 405:2001 and is adopted with the permission of CEN, rue de Stassart 36, B-1050 Brussels. Published by Standards South Africa 1 dr lategan roa
5、d groenkloof ! private bag x191 pretoria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 50405:2003 Edition 2 EN 405:2001 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved
6、by National Committee STANSA SC 5120.11D, Respiratory 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 405:1992). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 405
7、December 2001ICS 13.340.30 Supersedes EN 405:1992English versionRespiratory protective devices - Valved filtering half masks toprotect against gases or gases and particles - Requirements,testing, markingAppareils de protection respiratoire - Demi-masquesfiltrants soupapes contre les gaz ou contre le
8、s gaz et lesparticules - Exigences, essais, marquageAtemschutzgerte - Filtrierende Halbmasken mit Ventilenzum Schutz gegen Gase oder Gase und Partikeln -Anforderungen, Prfung, KennzeichnungThis European Standard was approved by CEN on 8 November 2001.CEN members are bound to comply with the CEN/CENE
9、LEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN m
10、ember.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 member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members ar
11、e 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPIS
12、CHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2001 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 405:2001 EEN 405:2001 (E)2ContentspageForeword4Introduction .51 Scope 62 Normative references 63 Terms
13、 and definitions64 Description .65 Classification75.1 General75.2 Types of gas filtering half masks .75.2.1 Valved gas filtering half masks 75.2.2 Valved multi-type gas filtering half masks 75.2.3 Valved combined filtering half masks .75.3 Designs of combined valved filtering half masks 75.4 Classes
14、 of valved gas filtering half masks76 Designation.87 Requirements .87.1 General87.2 Nominal values and tolerances 87.3 Visual inspection .87.4 Packaging .97.5 Practical performance .97.6 Leakage.97.7 Filter penetration/capacity 97.7.1 Particle filter penetration.97.7.2 Gas filtering capacity.107.8 F
15、inish of parts 107.9 Inhalation and exhalation valves117.10 Breathing resistance .117.10.1 General117.10.2 Inhalation resistance .117.10.3 Exhalation resistance 127.11 Clogging127.11.1 General127.11.2 Devices with separable particle filters.127.11.3 Devices with integral or separable particle filter
16、s127.11.4 Exhalation resistance 137.12 Compatibility with skin137.13 Flammability .137.14 Carbon dioxide content of the inhalation air 137.15 Head harness137.16 Field of vision.147.17 Demountable parts 148 Testing 148.1 General148.2 Visual inspection .148.3 Conditioning.148.3.1 General148.3.2 Donnin
17、g and doffing14EN 405:2001 (E)38.3.3 Temperature .148.3.4 Mechanical strength 158.4 Practical performance .158.4.1 General158.4.2 Walking test158.4.3 Work simulation test158.5 Inward Leakage168.5.1 General168.5.2 Principle168.5.3 Apparatus .168.5.4 Conditioning and number of test samples178.5.5 Test
18、 subjects178.5.6 Preparation of samples .178.5.7 Test procedure.188.5.8 Test using sulfur hexafluoride as test agent 198.5.9 Test using sodium chloride as test agent.208.6 Gas filtering capacity.228.7 Flammability.228.8 Carbon dioxide content of the inhalation air 228.9 Breathing resistance .238.10
19、Strength of attachment exhalation valve housing .249 Marking .249.1 Packaging .249.2 Valved gas filtering half mask with separable particle filters .249.2.1 Valved gas filtering half mask 249.2.2 Separable particle filters .259.3 Valved gas filtering half masks with integral particle filters .2510 I
20、nformation supplied by the manufacturer25Annex A (informative) Marking 40Annex ZA (informative) Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives 41Bibliography 42EN 405:2001 (E)4ForewordThis European Standard has been prepared by Technical Commi
21、ttee CEN/TC 79 “Respiratory protective devices“,the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2002, and conflicting national standards shall be withdr
22、awn at the latest byJune 2002.This European Standard supersedes EN 405:1992.This draft European Standard has been prepared under a mandate given to CEN by the European Commissionand the European Free Trade Association, and supports essential requirements of EU Directive 89/686/EEC.For relationship w
23、ith EU Directive, see informative annex ZA, which is an integral part of this standard.The annexes A and ZA are informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgiu
24、m, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,Switzerland and the United Kingdom.EN 405:2001 (E)5IntroductionA given respiratory protective device can only be approved when the individual components sati
25、sfy therequirements 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 simulati
26、on of the apparatus is permittedprovided the respiratory characteristics and weight distribution are similar to those of the complete apparatus.EN 405:2001 (E)61 ScopeThis European Standard specifies the performance requirements, test methods and marking requirements forvalved filtering half masks i
27、ncorporating either gas or combined filters as respiratory protective devices except forescape purposes. It does not cover gas filtering half masks which do not have valves or are fitted only withexhalation valves. It does not cover devices designed for use in circumstances where there is or might b
28、e anoxygen deficiency (oxygen less than a volume fraction of 17 %).Laboratory and practical performance tests are included for the assessment of compliance with the requirements.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publication
29、s. Thesenormative references are cited at the appropriate places in the text, and the publications 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 u
30、ndated references the latest edition of thepublication referred to applies (including amendments).EN 132, Respiratory protective devices - Definition of terms and pictograms.EN 134, Respiratory protective devices - Nomenclature of components.EN 141, Respiratory protective devices - Gas filters and c
31、ombined filters - Requirements, testing, marking.EN 143, Respiratory protective devices - Particle filters - Requirements, testing, marking.EN 371, Respiratory protective devices - AX gas filters and combined filters against low boiling organic compounds- Requirements, testing, marking.EN 372, Respi
32、ratory protective devices - SX gas filters and combined filters against specific named substances -Requirements, testing, marking.3 Terms and definitionsFor the purposes of this European Standard the terms and definitions in EN 132 and the nomenclature given inEN 134 apply.4 DescriptionA valved filt
33、ering half mask covers the nose and mouth and the chin and has both inhalation and exhalation valvesanda) consists entirely or substantially of filter material or,b) comprises a facepiece in which the gas filter(s) form(s) an inseparable part of the device and where particlefilters can be replaceabl
34、e.It provides adequate sealing for the intended use on the face of the wearer against the ambient atmosphere, whenthe skin is dry or moist and when the head is moved.Inhaled air enters through the filter material and through an inhalation valve(s). Exhaled air passes through anexhalation valve(s) to
35、 the ambient atmosphere.EN 405:2001 (E)7Since the devices are discarded on depletion of the gas filter, it is not expected that replaceable components will beprovided, e.g. valves or head harness.In addition to providing protection against gases and vapours these devices can be designed to also prot
36、ectagainst solid and liquid aerosols.Gas filters remove specified gases and vapours. Combined filters remove dispersed solid and liquid particles andspecified gases and vapours.5 Classification5.1 GeneralGas and combined valved filtering half masks are classified into types and classes according to
37、their applicationand protection capacity.5.2 Types of gas filtering half masks5.2.1 Valved gas filtering half masksType FFA for use against certain organic gases and vapours with a boiling point higher than 65 C as specifiedby the manufacturer.Type FFB for use against certain inorganic gases and vap
38、ours as specified by the manufacturer (excludingcarbon monoxide).Type FFE for use against sulfur dioxide and other acid gases and vapours as specified by the manufacturer.Type FFK for use against ammonia and organic ammonia derivatives as specified by the manufacturer.Type FFAX for use against certa
39、in low boiling organic compounds as specified by the manufacturer.Type FFSX for use against specific named gases and vapours.5.2.2 Valved multi-type gas filtering half masksGas valved filtering half masks which are a combination of two or more of the above types and which meet therequirements of eac
40、h type separately.5.2.3 Valved combined filtering half masksGas or multi-type valved gas filtering half masks incorporating a particle filter.5.3 Designs of combined valved filtering half masksThere are two designs of valved combined filtering half masks described in this European Standard: one with
41、integral particle filter(s), the second one with replaceable particle filter(s). Examples of classifications are:FFA1P1; FFA1P2; FFA1P3D.D“ stands for optional clogging with dolomite.5.4 Classes of valved gas filtering half masksValved filtering half masks may incorporate gas filters of types listed
42、 in 5.2.1 or 5.2.2, belonging to one of the twofollowing classes relating to their capacity:EN 405:2001 (E)8Class 1 low capacity FFGas1 filtering half mask e.g. FFA1;Class 2 medium capacity FFGas2 filtering half mask e.g. FFB2.The protection provided by Class 2 devices includes that provided by the
43、corresponding Class 1 device of the sametype.FFAX and FFSX devices are not classified in accordance with this clause.6 DesignationValved filtering half masks meeting the requirements of this European Standard shall be designated in the followingmanner:Valved filtering half mask EN 405, type class, o
44、ptionEXAMPLE Valved filtering half mask EN 405 FFA2P3D7 Requirements7.1 GeneralIn all tests, all test samples shall meet the requirements.7.1.1 Materials used shall be suitable to withstand handling and wear over the period for which the valved filteringhalf mask is designed to be used.Testing shall
45、 be done in accordance with 8.4.After undergoing the treatment described in 8.3.2 and 8.3.3 none of the devices shall collapse or shall havesuffered mechanical failure of the facepiece body or straps.7.1.2 Any material of the filter media or any gaseous products that may be released by the airflow t
46、hrough thefilter shall not be known to constitute a hazard or nuisance for the wearer.Testing shall be done in accordance with 8.2.7.1.3 Where the device can be used for more than a single shift (single-use), the materials used shall withstandthe cleaning and disinfecting agents recommended by the m
47、anufacturer.Testing shall be done in accordance with Table 6 and 8.2.7.2 Nominal values and tolerancesUnless otherwise specified, the values stated in this European Standard are expressed as nominal values. Exceptfor temperature limits, values which are not stated as maxima or minima shall be subjec
48、t to a limit deviation of 5 %. Unless otherwise specified, the ambient temperature for testing shall be from 16 C to 32 C, and thetemperature limits shall be subject to a limit deviation of 1 C.7.3 Visual inspectionThe visual inspection shall also include the marking and information supplied by the
49、manufacturer.EN 405:2001 (E)97.4 PackagingValved filtering half masks shall be offered for sale packaged in such a way that they are protected againstmechanical damage and contamination before use.They shall be factory sealed to protect the filter media against environmental influences in such a way, that thebreaking of the factory sealing can be identified.Testing shall be done in accordance with 8.2.7.5 Practical performanceThe device shall undergo practical performance tests under realistic conditions. These general tests serve thepurpose of chec
