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 0-626-14770-0 SANS 50148-3:2003 Edition 2 EN 148-3:1999 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Threa
4、ds for facepieces Part 3: Thread connection M 45 X 3 This national standard is the identical implementation of EN 148-3:1999 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 00
5、01 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 50148-3:2003 Edition 2 EN 148-3:1999 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC 5120.11
6、D, Respiratory 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 148:1992). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 148-3February 1999ICS 13.340.30 Supersedes
7、 EN 148-3:1992Descriptors: respiratory protective equipment, personal protective equipment, accident prevention, compressed air,junctions, threaded fittings, dimensions, interchangeability, designationEnglish versionRespiratory protective devices - Threads for facepieces - Part 3:Thread connection M
8、 45 x 3Appareils de protection respiratoire - Filetages pour picesfaciales - Partie 3: Raccord filetage M 45 x 3Atemschutzgerte - Gewinde fr Atemanschlsse - Teil 3:Gewindeanschlu M 45 x 3This European Standard was approved by CEN on 8 January 1999.CEN members are bound to comply with the CEN/CENELEC
9、 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 may be obtained on application to the Central Secretariat or to any CEN me
10、mber.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 Central Secretariat has the same status as the officialversions.CEN members a
11、re 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPI
12、SCHES KOMITEE FR NORMUNGCentral Secretariat: rue de Stassart, 36 B-1050 Brussels 1999 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 148-3:1999 EPage 2EN 148-3:1999ForewordThis European Standard has been prepared by the Technical Co
13、mmittee CEN/TC 79“Respiratory protective devices“, the secretariat of which is held by DIN.This European Standard supersedes EN 148-3:1992.This European Standard shall be given the status of a national standard, either bypublication of an identical text or by endorsement, at the latest by August 199
14、9, andconflicting national standards shall be withdrawn at the latest by August 1999.It is identical to the 1992 edition, with the approved Corrigendum EN 148-3:1992/AC:1996incorporated (see tolerances on M 45 x 3 in Figures 1 to 4), but with no other technicalchanges.This European Standard has been
15、 prepared under a mandate given to CEN by theEuropean Commission and the European Free Trade Association, and supports essentialrequirements of Directive 89/686/EEC.For relationship(s) with EU Directive(s), see informative Annex ZA, which is an integralpart of this standard.According to the CEN/CENE
16、LEC Internal Regulations, the national standardsorganizations 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, Switze
17、rlandand the United Kingdom.Page 3EN 148-3:19991 ScopeThis European Standard is applicable to self-contained compressed air breathingapparatus designed as positive pressure breathing apparatus.This European Standard specifies a thread connection, M 45 x 3, which may optionally beused for facepieces
18、for positive pressure breathing apparatus.This European Standard does not apply to negative pressure breathing apparatus, toclosed-circuit breathing apparatus or to diving equipment.2 Dimensions, designation2.1 The dimensions shall be as shown in figures 1 to 5. The connections may notcorrespond to
19、the pictorial details of figures 1 to 5.2.2 Thread connections with an external thread (code PA) on equipment shall be asshown in figures 1 and 2. For single duct systems (see figure 1) the code shall be PAAand for dual duct systems (see figure 2) the code shall be PAB.Dimensions in millimetres Dime
20、nsions in millimetresthread to start maximum 0,5 from end thread to start maximum 0,5 from end*) full thread *) full threadFigure 1 Figure 2Page 4EN 148-3:19992.3 Thread connections with internal thread (code PI) on facepiece shall be as shown infigure 3 and figure 4. For single duct systems (see fi
21、gure 3) the code shall be PIA and fordual duct systems (see figure 4) the code shall be PIB.Dimensions in millimetres Dimensions in millimetresFigure 3 Figure 42.4 Gasket (D)(code DPI)Dimensions in millimetresPage 5EN 148-3:1999Annex ZA (informative)Clauses of this European Standard addressing essen
22、tial requirements or otherprovisions of EU Directives.This European Standard has been prepared under a mandate given to CEN by theEuropean Commission and the European Free Trade Association and supports essentialrequirements of EU Directive 89/686/EEC.WARNING: Other requirements and other EU Directi
23、ves may be applicable to theproducts falling within the scope of this standard.The following clauses of this standard are likely to support requirements of Directive89/686/EEC, Annex II:EU Directive 89/686/EEC, Annex II: Clauses of this standard:1.2.1 21.3.3 22.8 22.10 23.10.1 2Compliance with the clauses of this standard provides one means of conforming with thespecific essential requirements of the Directive concerned and associated EFTAregulations.
