BS-EN-136-1998.pdf

BRITISH STANDARD BS EN 136:1998 Incorporating Corrigendum No. 1 Respiratory protective devices Full face masks Requirements, testing, marking The European Standard EN 136:1998 has the status of a British Standard ICS 13.340.30 ? Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 136:1998 This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 June 1998 © BSI 4 June 2004 ISBN 0 580 29126 X National foreword This British Standard is the English language version of EN 136:1998, including Corrigendum December 2003. It supersedes BS 7355:1990 and BS EN 136-10:1992 which are withdrawn. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to Subcommittee PH/4/3, Facepieces, which has the responsibility to: A list of organizations represented on this subcommittee 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 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 purport 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 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. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 38, an inside back 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 14996 Corrigendum No. 1 4 June 2004Changes to Figure 9 and 10.4 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 136 January 1998 ICS 13.340.30Incorporating corrigendum December 2003 Descriptor: Respiratory protective equipment, accident prevention, safety masks, specifications, tests, marking English version Respiratory protective devices Full face masks Requirements, testing, marking Appareils de protection respiratoire Masques complets Exigences, essais, marquage Atemschutzgeräte Vollmasken Anforderungen, Prüfung, Kennzeichnung This European Standard was approved by CEN on 1997-04-03. 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 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 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 official 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. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 1998 CEN All rights if exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 136:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 136:1998 © BSI 4 June 2004 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices, the secretariat of which is held by DIN. This European Standard replaces EN 136:1989 and EN 136-10:1992. 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 July 1998, and conflicting national standards shall be withdrawn at the latest by July 1998. 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 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, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 Introduction3 1Scope3 2Normative references3 3Definition3 4Description3 5Classification4 6Designation4 7Requirements4 7.1General4 7.2Nominal values and tolerances4 7.3Visual inspection4 7.4Materials4 7.5Resistance to temperature4 7.6Flammability4 7.7Resistance to thermal radiation5 7.8Cleaning and disinfecting5 7.9Finish of parts5 7.10 Replaceable components5 7.11 Head harness5 Page 7.12 Connector6 7.13 Speech diaphragm6 7.14 Eyepieces/visor7 7.15 Inhalation valves and exhalation valves7 7.16 Leaktightness8 7.17 Compatibility with skin8 7.18 Carbon dioxide content of the inhalation air9 7.19 Breathing resistance9 7.20 Inward leakage9 7.21 Field of vision10 7.22 Practical performance10 8Testing10 8.1General10 8.2Conditioning10 8.3Visual inspection10 8.4Resistance to temperature10 8.5Flammability11 8.6Resistance to thermal radiation14 8.7Cleaning and disinfecting15 8.8Head harness16 8.9Connector16 8.10 Speech diaphragm17 8.11 Eyepieces/visor17 8.12 Inhalation valves and exhalation valves17 8.13 Leaktightness17 8.14 Carbon dioxide content of the inhalation air17 8.15 Breathing resistance20 8.16 Inward leakage21 8.17 Field of vision29 8.18 Practical performance32 9Marking33 10Information supplied by the manufacturer34 Table Summary of requirements and tests35 Annex A (informative) Marking37 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives38 Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 136:1998 © BSI 4 June 2004 3 Introduction A given respiratory protective device 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 successful 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 characteristics and weight distribution are similar to those of the complete apparatus. 1 Scope This European Standard specifies minimum requirements for full face masks for respiratory protective devices. Full face masks for diving apparatus are not included in the scope of this European Standard. 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, provisions 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 by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 132:1990, Respiratory protective devices Definitions. EN 134:1990, Respiratory protective devices Nomenclature of components. EN 148-1:1987, Respiratory protective devices Threads for facepieces Standard thread connection. EN 148-2:1987, Respiratory protective devices Threads for facepieces Centre thread connection. EN 148-3:1992, Respiratory protective devices Threads for facepieces Thread connection M 45×3. ISO 6941:1984/AMD 1:1992, Textile fabrics Burning behaviour Measurement of flame spread properties of vertically oriented specimens. ISO 6942:1993, Clothing for protection against heat and fire Evaluation of thermal behaviour of materials and material assemblies when exposed to a source of radiant heat. 3 Definition For the purposes of this standard the definitions given in EN 132 and the nomenclature given in EN 134 apply together with the following. A full face mask is a facepiece which covers the eyes, nose, mouth and chin and provides adequate sealing on the face of the wearer of a respiratory protective device against the ambient atmosphere, when the skin is dry or moist, and even when the head is moved or when the wearer is speaking. 4 Description Air enters the full face mask through the connector(s) and passes either directly to the nose and mouth area or via the eye (visor) area of the full face mask. The exhaled air flows back either through the connector into the breathing apparatus (closed-circuit breathing apparatus, pendulum breathing) or directly to the ambient atmosphere, via the exhalation valve(s), or by other appropriate means in other types of respiratory protective devices. An inner mask may be used to separate the nose and mouth from the eye (visor) area(s) of the full face mask. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 136:1998 4 © BSI 4 June 2004 5 Classification Three classes of full face masks are described, each providing the same level of respiratory protection but having some differences which reflect intended areas of application. Class 1: Full face masks for light duty use. Class 2: Full face masks for general use. Class 3: Full face masks for special use. 6 Designation Designation of a full face mask meeting the requirements of this standard: Full face mask EN 136 (Class) (Options). 7 Requirements 7.1 General In all tests, all test samples shall meet the requirements. 7.2 Nominal values and tolerances Unless otherwise specified, the values stated in this standard are expressed as nominal values. Except for temperature limits, values which are not stated as maxima or minima shall be subject to a tolerance of ±5 %. Unless otherwise specified, the ambient temperature for testing shall be (24 ± 8) °C, the temperature limits shall be subject to an accuracy of ±1 °C and the relative humidity shall be (50 ± 30) %. 7.3 Visual inspection The visual inspection shall include that of the marking and of any information to be supplied by the manufacturer. Testing shall be done in accordance with 8.3. 7.4 Materials For class 2 and class 3 full face masks exposed parts i.e. those which may be subjected to impact during use of the apparatus shall not be made of aluminium, magnesium, titanium or alloys containing such proportions of these metals as will, on impact, give rise to frictional sparks capable of igniting flammable gas mixtures. Testing shall be done in accordance with 8.3. 7.5 Resistance to temperature Before and after this test the full face mask shall meet the requirement of 7.16. Following the conditioning in accordance with 8.2 and after being allowed to return to ambient temperature the full face mask shall show no appreciable deformation and any incorporated threaded connector to EN 148-1, EN 148-2 or EN 148-3 shall be gauged and shall comply with the appropriate standard. In addition with class 3 full face masks, the threads specified in EN 148-1, EN 148-2 or EN 148-3 as appropriate shall also be accurate according to the gauge, at the end of the conditioning period in accordance with 8.2b). Testing shall be done in accordance with 8.3, 8.4, 8.13 and 8.16. 7.6 Flammability 7.6.1 General Before and after these tests the full face mask shall meet the requirement of 7.16. Licensed Copy: sheffieldun sheffieldun, na, Sun Oct 29 09:26:15 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 136:1998 © BSI 4 June 2004 5 7.6.2 Class 1 full face masks Parts of the full face mask that might be exposed to a flame during use shall not burn or continue to burn for more than 5 s after removal from the flame. Testing shall be done in accordance with 8.3 and 8.5.1. 7.6.3 Class 2 and class 3 full face masks Parts of the full face mask that might be exposed to a flame during use shall not burn or continue to burn for more than 5 s after removal from the flame. Testing shall be done in accordance with 8.3 and 8.5.2. 7.7 Resistance to thermal radiation Class 3 full face masks shall be resistant to thermal radiation. This may be achieved in one of two ways, i.e.: The full face mask is considered to be resistant to thermal radiation in accordance with this standard if it remains leaktight after a test period of 20 min although it may be deformed. Alternatively the full face mask can be considered to be resistant to thermal radiation if the visibility becomes impaired after a test period of U4 min and the facepiece is still leaktight after a further minute. Before and after the thermal radiation test the full face mask shall meet the requirement of 7.16. Testing shall be done in accordance with 8.6. 7.8 Cleaning and disinfecting The materials used shall withstand the cleaning and disinfecting agents and procedures as recommended by the manufacturer. Testing shall be done in accordance with 8.7. 7.9 Finish of parts The finish of any part of the full face mask likely to be in contact with the wearer shall be free from sharp edges and burrs. Testing shall be done in accordance with 8.3 and 8.18. 7.10 Replaceable components This requirement applies to class 3 full face masks only. Unless integral with the full face mask the following components (when fitted) shall be replaceable: Inner mask, head harness, lens/visor, connector(s), inhalation and exhalation valves, check valves, speech diaphragm, lens wiper. Testing shall be done in accordance with 8.3. 7.11 Head harness 7.11.1 The head harness shall be designed so that the full face mask can be donned and removed easily. Testing shall be done in accord