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 0-626-14768-9 SANS 50142:2003 Edition 2 EN 142:2002 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Mouthpiec
4、e assemblies Requirements, testing, marking This national standard is the identical implementation of EN 142:2002 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 0001 tel: 012
5、 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 50142:2003 Edition 2 EN 142:2002 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC 5120.11D, Respiratory
6、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 142:1989). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 142April 2002ICS 13.340.30 Supersedes EN 142:1989English
7、versionRespiratory protective devices - Mouthpiece assemblies -Requirements, testing, markingAppareils de protection respiratoire - Ensembles emboutsbuccaux - Exigences, essais, marquageAtemschutzgerte - Mundstckgarnituren - Anforderungen,Prfung, KennzeichnungThis European Standard was approved by C
8、EN on 27 December 2001.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 bibliographical references concerning such nationalstandards
9、 may be obtained on application to the Management Centre 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 member into its own language and notified to the Mana
10、gement Centre 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, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United King
11、dom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2002 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 142:2002 EEN 142:2002 (
12、E)2ContentspageForeword4Introduction .51 Scope 52 Normative References .53 Terms and definitions54 Description .65 Designation.66 Requirements .66.1 General66.2 Ergonomics 66.3 Design .66.4 Materials66.5 Cleaning and disinfecting .76.6 Resistance to temperature76.7 Flammability .76.8 Demountable par
13、ts 76.9 Replaceable components76.10 Head harness76.11 Connection .86.11.1 General86.11.2 Thread connection according to EN 148-186.11.3 Thread connection according to EN 148-286.12 Inhalation valves and exhalation valves (if fitted) 86.12.1 General86.12.2 Inhalation valve(s)96.12.3 Exhalation valve(
14、s) 96.13 Leaktightness.96.14 Breathing resistance .96.14.1 Mouthpiece assembly with thread connection according to EN 148-196.14.2 Mouthpiece assembly with thread connection according to EN 148-2106.15 Nose clip .106.16 Practical performance .107 Testing 107.1 General107.2 Nominal values and toleran
15、ces 107.3 Visual inspection .117.4 Conditioning.117.5 Flammability .117.6 Head harness (pull test) 117.7 Connection .117.8 Exhalation valve (flow test).117.9 Exhalation valve housing (pull test) 117.10 Exhalation valve leakage.117.10.1 Samples 117.10.2 Test equipment 127.10.3 Test procedure .127.11
16、Leaktightness.127.12 Breathing resistance .157.13 Practical performance .15EN 142:2002 (E)37.13.1 General157.13.2 Walking test167.13.3 Work simulation test168 Marking .169 Information supplied by the manufacturer17Annex A (informative) Marking 19Annex ZA (informative) Clauses of this European Standa
17、rd addressing essential requirements or otherprovisions of EU Directives 20EN 142:2002 (E)4ForewordThis document EN 142:2002 has been prepared by Technical Committee CEN/TC 79 “Respiratory protectivedevices“, the secretariat of which is held by DIN.This European Standard shall be given the status of
18、 a national standard, either by publication of an identical text orby endorsement, at the latest by October 2002, and conflicting national standards shall be withdrawn at the latestby October 2002.This document supersedes EN 142:1989.This document has been prepared under a mandate given to CEN by th
19、e European Commission and the EuropeanFree 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 document.The annexes A and ZA are informative.According to the CEN/CENELEC Internal
20、Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,Sweden, Switzerland
21、and the United Kingdom.EN 142:2002 (E)5IntroductionA given respiratory protective device can only be approved when the individual components satisfy therequirements of the test specification which may be a complete standard or part of a standard and practicalperformance tests have been carried out s
22、uccessfully on complete apparatus where specified in the appropriatestandard. If for any reason a complete apparatus is not tested then simulation of the apparatus is permittedprovided the respiratory characteristics and mass distribution are similar to those of the complete apparatus.1 ScopeThis Eu
23、ropean Standard refers to mouthpiece assemblies for respiratory protective devices, except escapeapparatus and diving apparatus.It specifies minimum requirements for mouthpiece assemblies for use as part of respiratory protective devices.Laboratory and practical performance tests are included for th
24、e assessment of compliance with the requirements.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 are listed hereafter. Fordated
25、 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 (including amendments).EN 132, Respiratory protective
26、devices - Definitions of terms and pictograms.EN 134, Respiratory protective devices - Nomenclature of components.EN 148-1, Respiratory protective devices - Threads for facepieces - Part 1: Standard thread connection.EN 148-2, Respiratory protective devices - Threads for facepieces - Part 2: Centre
27、thread connection.EN 148-3, Respiratory protective devices - Threads for facepieces - Part 3: Thread connection M45 x 3.EN 13274-2, Respiratory protective devices - Methods of test - Part 2: Practical performance testsEN 13274-3, Respiratory protective devices - Methods of test - Part 3: Determinati
28、on of breathing resistance.EN 13274-4, Respiratory protective devices - Methods of test - Part 4: Determination of resistance to flame andflammability.3 Terms and definitionsFor the purpose of this European Standard the definitions given in EN 132 and the nomenclature given in EN 134apply.EN 142:200
29、2 (E)64 DescriptionAir enters the mouthpiece assembly and passes directly into the mouth. The exhaled air flows back either throughthe facepiece connector into the breathing apparatus (closed-circuit breathing apparatus, pendulum breathing) ordirectly to the ambient atmosphere, via the exhalation va
30、lve(s), in other types of respiratory protective devices.5 DesignationMouthpiece assemblies meeting the requirement of this European Standard shall be designated in the followingmanner:Mouthpiece assembly EN 142.6 Requirements6.1 GeneralIn all tests all test samples shall meet the requirements.6.2 E
31、rgonomicsThe requirements of this standard are intended to take account of the interaction between the wearer, themouthpiece assembly, and where possible, the working environment in which the mouthpiece assembly is likely tobe used. See annex ZA.6.3 DesignThe design of the mouthpiece assembly shall
32、be such as to allow its inspection in accordance with themanufacturers instructions.The mouthpiece assembly shall be sufficiently robust to withstand the rough usage it is likely to receive in service.The mouthpiece assembly shall be designed so that there are no protruding parts or sharp edges like
33、ly to becaught on projections in narrow passages.The surface of any part of the mouthpiece assembly likely to be in contact with the wearer shall be free from sharpedges and burrs.The mouthpiece assembly shall be designed to ensure its full function in any orientation.The mouthpiece shall be so desi
34、gned that inward leakage between lips and mouthpiece is negligible.The mouthpiece shall be so designed that the airflow is not restricted unintentionally when the mouthpice assemblyis being worn.Testing shall be done in accordance with 7.3 and 7.13.6.4 MaterialsAll materials used in the construction
35、 shall have adequate mechanical strength.Exposed parts, i.e. those which may be subjected to impact during use of the apparatus shall not be made ofaluminium, magnesium, titanium or alloys containing such proportions of these metals as will, on impact, give riseto frictional sparks capable of igniti
36、ng flammable gas mixtures.Materials which come into direct contact with the wearers skin shall not be known to be likely to cause irritation orany other adverse effect to health.EN 142:2002 (E)7Testing shall be done in accordance with 7.3 and 7.13.6.5 Cleaning and disinfectingAll materials used shal
37、l withstand the cleaning and disinfection agents and procedures recommended by themanufacturer.Testing shall be done in accordance with 7.3 and 7.13.6.6 Resistance to temperatureFollowing the conditioning in accordance with 7.4 and after being allowed to return to ambient temperature themouthpiece a
38、ssembly shall show no appreciable deformation and any incorporated threaded connector toEN 148-1 or EN 148-2 shall be gauged and shall comply with the appropriate standard.Testing shall be done in accordance with 7.3.6.7 FlammabilityParts of the mouthpiece assembly that might be exposed to a flame d
39、uring use shall not burn or continue to burnfor more than 5 s after removal from the flame.Testing shall be done in accordance with 7.3 and 7.5.6.8 Demountable partsAll demountable connections shall be readily connected and secured, where possible by hand. Any means ofsealing used shall be retained
40、in position when the connection is disconnected during normal maintenance.Testing shall be done in accordance with 7.3 and 7.13.6.9 Replaceable componentsUnless integral with the mouthpiece assembly the following components (if fitted) shall be replaceable:Head harness, connector(s), inhalation and
41、exhalation valves.Testing shall be done in accordance with 7.3.6.10 Head harnessThe head harness shall be designed so that the mouthpiece assembly can be donned and removed easily.Testing shall be done in accordance with 7.13.The head harness shall be adjustable or self-adjusting and shall hold the
42、mouthpiece assembly firmly andcomfortably in position.Testing shall be done in accordance with 7.13.Each strap of the head harness, buckles and other adjusting means shall withstand a pull of 50 N applied for 10 sin the direction of pulling when the facepiece is donned. No breaks or sliding of the s
43、traps shall occur.The requirement applies to the buckles and attachment lugs as well as to the straps.Testing shall be done in accordance with 7.3 and 7.6.EN 142:2002 (E)86.11 Connection6.11.1 GeneralThe connection between the mouthpiece assembly and the apparatus may be achieved by a permanent or s
44、pecial(e.g. insert) type of connection or by a thread connection.Testing shall be done in accordance with 7.3.The mouthpiece assembly shall not be equipped with a thread connection according to EN 148-3.Testing shall be done in accordance with 7.3.Correct and reliable connection between mouthpiece a
45、ssembly and other parts of the respiratory protective deviceshall be assured.Testing shall be done in accordance with 7.3, 7.11 and 7.13.The connection between the mouthpiece body and the connector shall be sufficiently robust to withstand axially atensile force of 50 N.Testing shall be done in acco
46、rdance with 7.7.6.11.2 Thread connection according to EN 148-1This thread connection may be used as the mouthpiece assembly connection for all respiratory protective devices,except closed-circuit breathing apparatus and positive pressure demand breathing apparatus.If this thread connection is used t
47、hen the relevant requirements of EN 148-1 shall be satisfied.Testing shall be done in accordance with 7.3.6.11.3 Thread connection according to EN 148-2This thread connection may be used as the mouthpiece assembly connection for closed-circuit breathingapparatus.If this thread connection is used the
48、n the relevant requirements of EN 148-2 shall be satisfied.Testing shall be done in accordance with 7.3.6.12 Inhalation valves and exhalation valves (if fitted)6.12.1 GeneralValve assemblies shall be such that they can be readily maintained and correctly replaced.It shall not be possible to fit an e
49、xhalation valve assembly into the inspiratory circuit or an inhalation valve assemblyinto the exhalation circuit.Inhalation and exhalation valve assemblies, sub-assemblies and piece parts that are by the manufacturer designedto be identical, are acceptable.Differently designed inhalation and exhalation valves are acceptable if a precise and comprehensible description isgiven in the information manual supplied by the manufacturer. The description in the information manual suppliedby the manufacturer should be supported by illustrations (photographs, drawings) on how to assembl
