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1、BRITISH STANDARD BS EN 12941:1999 Incorporating Amendment No. 1 Respiratory protective devices Powered filtering devices incorporating a helmet or a hood Requirements, testing, marking The European Standard EN 12941:1998 with the incorporation of Amendment A1 has the status of a British Standard ICS
2、 13.340.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12941:1999 This British Standard, having been prepared under the direction of the Health and Environment Sector Committee, was published under the authority of the Standards
3、Committee and comes into effect on 15 April 1999 BSI 3 June 2004 ISBN 0 580 32374 9 National foreword This British Standard is the English language version of EN 12941:1998, including amendment A1:2003. It supersedes BS EN 146:1992 which is withdrawn. The UK participation in its preparation was entr
4、usted to Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/8, Powered filtering devices, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement int
5、ernational or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not pu
6、rport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquir
7、ies 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. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 50, an inside ba
8、ck cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No.DateComments 149553 June 2004Changes to Clauses 6.3.1, 7.3.6.1.2, 9.1.10 and deletion of Clause 6.6.1 Licensed Copy: sheffieldun she
9、ffieldun, na, Sat Oct 28 06:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12941 October 1998 + A1 December 2003 ICS 13.340.30Supersedes EN 146:1991 Descriptors: accident prevention, personal protective equipment, filters, helmets, classificatio
10、ns, design, specifications, tests, technical notices, marking English version Respiratory protective devices Powered filtering devices incorporating a helmet or a hood Requirements, testing, marking (includes amendment A1:2003) Appareils de protection respiratoire Appareils filtrants ventilation ass
11、iste avec casque ou cagoule Exigences, essais, marquage (inclut lamendement A1:2003) Atemschutzgerte Geblsefiltergerte mit einem Helm oder einer Haube Anforderungen, Prfung, Kennzeichnung (enthlt nderung A1:2003) This European Standard was approved by CEN on 24 August 1998; Amendment A1 was approved
12、 by CEN on 3 November 2003. 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 references concerning such national st
13、andards 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 into its own language and notified
14、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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain,
15、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 1998 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nation
16、al Members. Ref. No. EN 12941:1998 + A1:2003 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12941:1998 BSI 3 June 2004 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices
17、, the Secretariat of which is held by DIN. This European Standard replaces EN 146:1991. 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 April 1999, and conflicting national standards shall be with
18、drawn at the latest by April 1999. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which
19、is an integral part of this standard. 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
20、, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 12941:1998/A1:2003) has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices, the secretariat of which is held by DIN. This Amendment t
21、o the European Standard EN 12941:1998 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2004, and conflicting national standards shall be withdrawn at the latest by June 2004. This document has been prepared under a
22、mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Sta
23、ndard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3D
24、efinitions and description4 4Designation4 5Classification5 6Requirements5 Page 6.1Materials5 6.2Resistance to temperature6 6.3Helmets and hoods6 6.4Inward leakage7 6.5Breathing resistance7 6.6Air supply7 6.7Checking and warning facilities7 6.8Clogging7 6.9Electrical components7 6.10 Breathing hose8
25、6.11 Filters8 6.12 Noise level12 6.13 Carbon dioxide content of the inhalation air12 6.14 Resistance to flame12 6.15 Exhalation means12 6.16 Mass13 6.17 Practical performance13 7Testing13 7.1Conditioning14 7.2Visual inspection15 7.3Inward leakage15 7.4Field of vision20 7.5Visor robustness20 7.6Breat
26、hing resistance20 7.7Air supply flow rate20 7.8Clogging22 7.9Resistance to collapse of breathing hose22 7.10 Strength of hose and couplings and of connection between hood and breathing hose22 7.11 Mechanical strength of filters23 7.12 Filters23 7.13 Noise level25 7.14 Carbon dioxide content of the i
27、nhalation air25 7.15 Resistance to flame26 7.16 Practical performance27 7.17 Material porosity28 8Marking42 9Information supplied by the manufacturer45 Annex A (normative) Fitting procedure for hoods which seal around the neck and which may or may not incorporate a head harness46 Annex B (informativ
28、e) Marking49 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives50 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12941:1998 BSI 3 June 2004 3 Introduction A giv
29、en respiratory protective device incorporating a helmet or a hood can only be approved when the individual components satisfy the requirements of the test specification which may be a complete standard or part of a standard, and practical performance tests have been carried out successfully on a com
30、plete 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 characteristics and weight distribution are similar to those of the complete apparatus. 1 Scope This European Stand
31、ard specifies minimum requirements for powered filtering devices incorporating a helmet or a hood with gas, particle or combined filter(s) for respiratory protection. It does not cover devices designed for use in circumstances where there is or might be an oxygen deficiency (oxygen less than 17 % by
32、 volume). Also, it does not cover respiratory protective devices designed for escape purposes. Laboratory and practical performance tests are included for the assessment of compliance with the requirements. 2 Normative references This European Standard incorporates by dated or undated reference, pro
33、visions 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 European Standard only when incorporated in it
34、 by amendment or revision. For undated references the latest edition of the publication referred to applies. prEN 132:1996, Respiratory protective devices Definitions. EN 134:1998, Respiratory protective devices Nomenclature of components. EN 136:1998, Respiratory protective devices Full face masks
35、Requirements, testing, marking. EN 140:1998, Respiratory protective devices Half masks and quarter masks Requirements, testing, marking. prEN 143:1997, Respiratory protective devices Particle filters Requirements, testing, marking. EN 148-1:1987, Respiratory protective devices Threads for facepieces
36、 Standard thread connection. EN 166:1995, Personal eye protection Specifications. EN 169:1992, Personal eye protection Filters for welding and related techniques Transmittance requirements and recommended use. EN 170:1992, Personal eye protection Ultraviolet filters Transmittance requirements and re
37、commended use. EN 171:1992, Personal eye protection Infrared filters Transmittance requirements and recommended use. EN 379:1994, Specification for welding filters with switchable luminous transmittance and welding filters with dual luminous transmittance. EN 397:1995, Industrial safety helmets. EN
38、ISO 6941:1995, Textile fabrics Burning behaviour Measurement of flame spread properties of vertically oriented specimens. EN 50014:1992, Electrical apparatus for potentially explosive atmospheres General requirements. EN 50020:1994, Electrical apparatus for potentially explosive atmospheres Intrinsi
39、c safety “i”. IEC 651:1979, Sound level meters. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:19:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12941:1998 4 BSI 3 June 2004 3 Definitions and description 3.1 Definitions For the purposes of this European Standard the definitions given in
40、 prEN 132 and the nomenclature given in EN 134 apply together with the following. 3.1.1 powered filtering device incorporating a helmet or hood device, dependent on the ambient air, incorporating: one or more particle filter(s) providing protection against solid or liquid aerosols of negligible vola
41、tility and decomposition, or a combination of such aerosols, or one or more gas filter(s) providing protection against specified gases and vapours, or one or more combined filter(s) providing protection against dispersed solid and/or liquid particles as defined above, and specified gases and vapours
42、 and a turbo unit supplying the filtered air to a facepiece, which can be a hood or a helmet 3.2 Description The device typically consists of: a) a facepiece which can be a hood as defined in prEN 132 or a device which seals on the face, excluding facepieces specified in EN 136 or EN 140. Either typ
43、e of facepiece may incorporate a helmet, e.g. to provide head protection against mechanical impact and/or a visor to provide eye and face protection against given risks, possibly combined; b) a turbo unit designed to be carried/worn by the wearer which supplies filtered ambient air to the facepiece.
44、 The energy supply for the turbo unit may or may not be carried on the person; c) a filter or filters through which all air supplied passes; d) exhalation valves or other outlets depending on the design by which exhaled air and air in excess of the wearers demand is discharged. 4 Designation Respira
45、tory protective devices meeting the requirements of this standard shall be designated in the following manner: Powered filtering device/EN 12941/ (Class) (type) (options) for example: Powered filtering device/EN 12941/TH2A2P SL. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 06:19:38 GMT+00:
46、00 2006, Uncontrolled Copy, (c) BSI EN 12941:1998 BSI 3 June 2004 5 5 Classification The complete devices are classified and designated according to the maximum inward leakage required as given in Table 1. Table 1 Classification 6 Requirements 6.1 Materials 6.1.1 General The device shall be made of
47、suitable material to withstand normal usage and exposure to those temperatures, humidities and corrosive environments that are likely to be encountered. Testing shall be done in accordance with 7.2. 6.1.2 Compatibility with skin Materials that may come into contact with the wearers skin shall not be
48、 known to be likely to cause skin irritation or any other adverse effect to health. Testing shall be done in accordance with 7.2. 6.1.3 Cleaning and disinfection The materials used in the construction of the device shall withstand the cleaning and disinfecting agents and procedures recommended by th
49、e manufacturer. Testing shall be done in accordance with 7.2 and 7.3.5.16. Classification of complete device Maximum inward leakage Maximum particle filter penetration Class Gas filter type and class (if applicable) Particle filter (if applicable) % NaCl aerosol % Paraffin oil mist % TH1 A1, 2 or 3 P 10 10 10 B1, 2 or 3 E1, 2 or 3 K1, 2 or 3 AX SX TH2 A1, 2 or 3 P 2 2 2 B1, 2 or 3 E1, 2 or 3 K1, 2 or 3 AX SX TH3 A1, 2 or 3 P