1、BRITISH STANDARD BSEN 148-3:1999 Incorporating Corrigendum No.1 Respiratory protective devices Threads for facepieces Part3: Thread connection M45 3 The European Standard EN148-3:1999 has the status of a BritishStandard ICS13.340.30BSEN148-3:1999 This BritishStandard, having been prepared under the
2、directionof the Sector Committeefor Health and Environment, was published under the authority of the Standards Committee and comesinto effect on 15July1999 BSI04-2000 ISBN 0 580 32265 3 National foreword This BritishStandard is the English language version of EN148-3:1999. Itsupersedes BSEN148-3:199
3、2, which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee PH/4, Respiratory protection, to PH/4/3, Facepieces, which has the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpret
4、ation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The BritishStandards which
5、 implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not
6、 purport to include all the necessary provisions of a contract. Users of British Standards are responsible 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 fr
7、ont cover, pagesi andii, theEN title page, pages2 to6 and a back cover. 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. Amendments issued since publication Amd. No. Date Comments 10
8、723 Corrigendum October 1999 Adds supersession details to the National foreword.BSEN148-3:1999 BSI 04-2000 i Contents Page National foreword Inside front cover Foreword 2 Text of EN148-3 3ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN148-3 February1999 ICS 13.340.30 SupersedesEN148-3:1
9、992 Descriptors: Respiratory protective equipment, personal protective equipment, accident prevention, compressed air, junctions, threaded fittings, dimensions, interchangeability, designation English version Respiratory protective devicesThreads for facepieces Part3:Thread connection M45 3 Appareil
10、s de protection respiratoire Filetages pour pices faciales Partie3: Raccord filetage M45 3 Atemschutzgerte Gewinde fr Atemanschlsse Teil3: Gewindeanschlu M45 3 This European Standard was approved by CEN on8 January1999. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which
11、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 Standa
12、rd 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 standa
13、rds bodies of Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee f
14、r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN148-3:1999 EEN148-3:1999 2 BSI 04-2000 Foreword This European Standard has been prepared by the Technical Commit
15、tee CEN/TC79, Respiratory protective devices, the Secretariat of which is held by DIN. This European Standard supersedes EN148-3:1992. This European Standard shall be given the status ofa national standard, either by publication of an identical text or by endorsement, at the latest by August1999, an
16、d conflicting national standards shall be withdrawn at the latest by August1999. It is identical to the1992 edition, with the approved Corrigendum EN148-3:1992/AC:1996 incorporated (see tolerances on M45 3 in Figure 1 to Figure 4), but with no other technical changes. This European Standard has been
17、 prepared under amandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements ofDirective89/686/EEC. For relationship(s) with EU Directive(s), see informative Annex ZA, which is an integral part ofthis standard. According to the CEN/CEN
18、ELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,Spain, Sweden, Swit
19、zerland and theUnited Kingdom. Contents Page Foreword 2 1 Scope 3 2 Dimensions, designation 3 Annex ZA (informative) Clauses of this EuropeanStandard addressing essential requirements or other provisionsof EUDirectives 6 Figure 1 3 Figure 2 3 Figure 3 4 Figure 4 4 Figure 5 5EN148-3:1999 BSI 04-2000
20、3 1 Scope This European Standard is applicable to self-contained compressed air breathing apparatus designed as positive pressure breathing apparatus. This European Standard specifies a thread connection, M45 3, which may optionally be usedfor facepieces for positive pressure breathing apparatus. Th
21、is European Standard does not apply to negative pressure breathing apparatus, to closed-circuit breathing apparatus or to diving equipment. 2 Dimensions, designation 2.1 The dimensions shall be as shown in Figure 1 to Figure 5. The connections may not correspond to the pictorial details of Figure 1
22、to Figure 5. 2.2 Thread connections with an external thread (code PA) on equipment shall be as shown in Figure 1 andFigure 2. For single duct systems (see Figure 1) the code shall be PAA and for dual duct systems (seeFigure 2) the code shall be PAB. Figure 1 Figure 2 EN148-3:1999 4 BSI 04-2000 2.3 T
23、hread connections with internal thread (code PI) on facepiece shall be as shown in Figure 3 andFigure 4. For single duct systems (see Figure 3) the code shall be PIA and for dual duct systems (seeFigure 4) the code shall be PIB. Figure 3 Figure 4 EN148-3:1999 BSI 04-2000 5 2.4 Gasket (D) NOTEMateria
24、l: Elastomer left to the choice of the manufacturer Figure 5 EN148-3:1999 6 BSI 04-2000 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or otherprovisions of EU Directives This European Standard has been prepared under a mandate given to CEN by the European
25、 Commissionand the European Free Trade Association and supports essential requirements of EUDirective89/686/EEC. WARNING Other requirements and other EU Directives may be applicable to the products falling withinthe scope of this standard. The following clauses of this standard are likely to support
26、 requirements of Directive89/686/EEC, AnnexII: Compliance with the clauses of this standard provides one means of conforming with the specific essentialrequirements of the Directive concerned and associated EFTA regulations. EU Directive89/686/EEC, Annex II Clauses of this standard 1.2.1 2 1.3.3 2 2
27、.8 2 2.10 2 3.10.1 2blankBSEN 148-3:1999 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal
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