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1、BRITISH STANDARD BS EN 405:1993 Respiratory protective devices Valved filtering half masks to protect against gases or gases and particles The European Standard EN 405:1992 has the status of a British Standard UDC 614.894.2:620.1:62-777:614.8 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07
2、:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 405:1993 This British Standard, having been prepared under the direction of the Personal Safety Equipment Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 February 1993 BSI 07-1999
3、 The following BSI references relate to the work on this standard: Committee reference PSM/14 Draft for comment 90/45750 DC ISBN 0 580 20636 X Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the nation
4、al standards organizations of the following countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. Gre
5、eceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsfo
6、rbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments License
7、d Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 405:1993 BSI 07-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Introduction3 1 Scope3 2 Normative references3 3 Definitions and classification3 4 R
8、equirements4 5 Testing7 6 Instructions for use19 7 Marking19 National annex NA (informative) Committees responsibleInside back cover National annex NB (informative) Cross-references Inside back cover Figure 1 Test equipment for test of mechanical strength9 Figure 2 Basket and hopper, rubber chipping
9、s10 Figure 3 Typical apparatus used in the determination of inward leakage using sodium chloride11 Figure 4 Assembly of atomizer12 Figure 5 Sample probe13 Figure 6 Facial dimensions14 Figure 7 Scheme of typical test rig for carbon dioxide content of the inhalation air17 Figure 8 Dummy head (Sheffiel
10、d head) for carbon dioxide content test of the inhalation air (dead space) for a valved filtering half mask18 Figure 9 Scheme of test arrangement and air flow for carbon dioxide test18 Figure 10 Fixture for faceblank19 Table 1 Particle filter penetration (integral filters)5 Table 2 Gas filtering cap
11、acity5 Table 3 Inhalation resistance: valved gas filtering half masks6 Table 4 Inhalation resistance: valved combined filtering half masks incorporating integral combined filters6 Table 5 Inhalation resistance: valved combined filtering half masks with separable particle filters6 Table 6 Inhalation
12、resistance7 Table 7 Testing valved gas or combined filtering half masks8 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 405:1993 ii BSI 07-1999 National foreword This British Standard has been prepared under the direction of the Perso
13、nal Safety Equipment Standards Policy Committee and is the English language version of EN 405:1992 “Respiratory protective devices Valved filtering half masks to protect against gases or gases and particles Requirements, testing, marking”, published by the European Committee for Standardization (CEN
14、). EN 405 was produced as a result of international discussions in which the United Kingdom took an active part. There is no existing equivalent British Standard to EN 405. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are respo
15、nsible for 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, pages i and ii, the EN title page, pages 2 to 20, an inside back cover and a back cover.
16、This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EU
17、ROPENNE EUROPISCHE NORM EN 405 November 1992 UDC 614.894.2:620.1:62-777:614.8 Descriptors: Accident prevention, personal protective equipment, respiratory protective equipment, safety masks, air filters, classifications, specifications, tests, marking English version Respiratory protective devices V
18、alved filtering half masks to protect against gases or gases and particles Requirements, testing, marking Appareils de protection respiratoire Demi-masques filtrants soupapes contre les gaz ou contre les gaz et les particules Exigences, essais, marquage Atemschutzgerte Filtrierende Halbmasken mit Ve
19、ntilen zum Schutz gegen Gase oder Gase und Partikeln Anforderungen, Prfung, Kennzeichnung This European Standard was approved by CEN on 1992-11-16. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
20、 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 Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A versio
21、n 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 official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greec
22、e, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1992 Copyright reser
23、ved to CEN members Ref. No. EN 405:1992 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 405:1992 BSI 07-1999 2 Foreword This European Standard was prepared by the Technical Committee CEN/TC 79 “Respiratory Protective Devices”, the Secre
24、tariat of which is held by DIN. The text of the draft was submitted to the Formal Vote and was approved as EN. This European Standard has been prepared under a mandate given to CEN by the Commission of the European Communities and the European Free Trade Association, and supports essential requireme
25、nts of the EC Directive(s). 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 May 1993, and conflicting national standards shall be withdrawn at the latest by May 1993. The standard was approved and
26、 in accordance with the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom
27、. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 405:1992 BSI 07-19993 Introduction A given respiratory protective device can only be approved when the individual components satisfy the requirements of the test specification which may be
28、 a complete standard or part of a standard, and practical performance tests have been carried out on complete apparatus where specified in the appropriate standard. If for any reason a complete apparatus is not tested then simulation of the apparatus is permitted provided the respiratory characteris
29、tics and weight distribution are similar to those of the complete apparatus. 1 Scope This European Standard specifies the performance requirements, test methods and marking requirements for valved filtering half masks incorporating either gas or combined filters as respiratory protective devices exc
30、ept for escape purposes. It does not cover gas filtering half masks which do not have valves or are fitted only with exhalation valves. It does not cover devices designed for use in circumstances where there is or might be an oxygen deficiency (oxygen less than 17 % by volume). Laboratory and practi
31、cal performance tests are included for the assessment of compliance with the requirements. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the
32、publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132,
33、 Respiratory protective devices; Definitions. EN 136, Respiratory protective devices; Full face masks; Requirements, testing, marking. EN 140, Respiratory protective devices; Half masks and quarter masks; Requirements, testing, marking. EN 141, Respiratory protective devices; Gas filters and combine
34、d filters; Requirements, testing, marking. EN 143, Respiratory protective devices; Particle filters; Requirements, testing, marking. EN 149, Respiratory protective devices; Filtering half masks to protect against particles; Requirements, testing, marking. EN 371, Respiratory protective devices; AX f
35、ilters and combined filters against low boiling compounds; Requirements, testing, marking. EN 372, Respiratory protective devices; SX gas filters and combined filters against specific named substances; Requirements, testing, marking. 3 Definitions and classification 3.1 Definitions For the purposes
36、of this standard the definitions in EN 132 apply together with the following. 3.1.1 valved filtering half mask a valved filtering half mask is one that covers the nose and mouth and possibly the chin and has both inhalation and exhalation valves and a) consists entirely or substantially of filter ma
37、terial or, b) comprises a facepiece in which the gas/vapour filter(s) form(s) an inseparable part of the device and where particle filters may be replaceable if appropriate to extend the life of the gas/vapour device(s) to its rated duration. it provides adequate sealing for the intended use on the
38、face of the wearer against the ambient atmosphere, when the skin is dry or moist and when the head is moved inhalation air enters through the filter material and through an inhalation valve(s). Exhaled air passes through an exhalation valve(s) to the ambient atmosphere in addition to providing prote
39、ction against gases these devices can be designed to protect against solid and water-based aerosols only or against both solid and liquid aerosols. A solid aerosol is defined as a suspension of solid particles in air, a liquid aerosol is defined as a suspension of liquid droplets in air and a water-
40、based aerosol is defined as one which is produced from solutions and/or suspensions of solid materials in water such that the only hazardous component is attributable to the solid material the term “gases” is taken to include vapours gas filters remove specified gases and vapours. Combined filters r
41、emove dispersed solid and/or liquid particles and specified gases and vapours 3.2 Classification 3.2.1 General According to their application and protection capacity, gas and combined filters are classified into types and classes. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 04 07:40:50 GMT+0
42、0:00 2006, Uncontrolled Copy, (c) BSI EN 405:1992 4 BSI 07-1999 3.2.2 Types of gas filtering half masks Type FFA for use against certain organic gases and vapours with a boiling point higher than 65 C as specified by the manufacturer. Type FFB for use against certain inorganic gases and vapours as s
43、pecified by the manufacturer (excluding carbon 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 certain lo
44、w boiling organic compounds as specified by the manufacturer. Type FFSX for use against specific named gases and vapours. 3.2.3 Classes of gas filtering half masks Valved filtering half masks may incorporate gas filters of types listed in 3.2.2 and combinations of these types, belonging to one of th
45、e two following classes relating to their capacity: Class 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 corresponding Class 1 device of the same type. 3.2.4 T
46、ypes of combined filtering half masks There are two types of valved combined filtering half masks described in this European Standard: one with integral particle filter(s), the second one with replaceable particle filter(s). Examples of classifications are: FFA1P1; FFA1P2; FFA1P3. 4 Requirements 4.1
47、 Materials 4.1.1 Materials used shall be suitable to withstand handling and wear over the period for which the valved filtering half mask is designed to be used. After undergoing the treatment described in 5.2.2 none of the devices shall have suffered mechanical failure of the facepiece body or stra
48、ps. 4.1.2 Any material of the filter media or any gaseous products that may be released by the air flow through the filter shall not constitute a hazard or nuisance for the wearer. 4.1.3 The use of aluminium, magnesium and titanium or alloys containing such proportions of these metals, as will, on i
49、mpact, give rise to frictional sparks capable of igniting flammable gas mixtures, for exposed parts, i.e. those which may be subjected to impact during use of the device, shall be restricted to a minimum. 4.1.4 Where the device can be used for more than a single shift (single-use), the materials used shall withstand the cleaning and disinfecting agents recommended by the manufacturer. 4.2 Packaging The device shall be offered for sale packaged and individually sealed to prevent contamination b
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