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 0-626-14772-7 SANS 50148-1:2003 Edition 2 EN 148-1:1999 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Threa
4、ds for facepieces Part 1: Standard thread connection This national standard is the identical implementation of EN 148-1:1999 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 50148-1:2002 Edition 2 EN 148-1:1999 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 148-1:1987). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 148-1February 1999ICS 13.340.30 Supersed
7、es EN 148-1:1987Descriptors: respiratory protective equipment, personal protective equipment, accident prevention, junctions, threadedfittings, screw threads, dimensionsEnglish versionRespiratory protective devices - Threads for facepieces - Part 1:Standard thread connectionAppareils de protection r
8、espiratoire - Filetages pour picesfaciales - Partie 1: Raccord filetage standardAtemschutzgerte - Gewinde fr Atemanschlsse - Teil 1:RundgewindeanschluThis European Standard was approved by CEN on 8 January 1999.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate
9、 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 member.This European Standard exists in
10、 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 are the national standards bodies of A
11、ustria, 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 NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCentral Secre
12、tariat: 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 148-1:1999 EPage 2EN 148-1:1999ForewordThis European Standard has been prepared by Technical Committee CEN/TC 79“Respiratory protective
13、devices“, the secretariat of which is held by DIN.This European Standard supersedes EN 148-1:1987This 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 1999, andconflicting national standards shall
14、 be withdrawn at the latest by August 1999.It is identical to the 1987 edition which was approved under old CEN rules, with theapproved Corrigendum EN 148-1:1987/AC:1992 incorporated (see heading column 4 intable in 3.1), but with no other technical changes.This European Standard has been prepared u
15、nder 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/CENELEC Interna
16、l 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, Switzerlandand th
17、e United Kingdom.Page 3EN 148-1:19991 ScopeThis European Standard is applicable to standard threads for respiratory protectivedevices. This standard does not apply to diving equipment and to positive pressuredemand breathing apparatus.2 Standard thread connector (C)Dimensions in millimetres2.1 Exter
18、nal thread2.1.1 Without socket for filters (CA)Figure 12.1.2 With socket for equipment connectors other than for filters (CAT)Dimensions in millimetresFigure 2*) Specification see clause 3Page 4EN 148-1:19992.2 Internal threadDimensions in millimetresFigure 3a) Figure 3b) Figure 3c)Dimensions in mil
19、limetres2.3 GasketFigure 43 Threads3.1 Dimensions of threadsFigure 5*) Specification see clause 3Page 5EN 148-1:1999Table 1: Thread limitsDimensions in millimetresThread limits Pitch Numberof threadsper25,4ThreadheightRadiusExternal thread Internal threadThread MajordiameterMinordiameterMajordiamete
20、rMinordiameterd1d2D1D2hzt1rmax. min. max. min. min. max.Rd 40 x 1/7 40,00 39,70 38,40 40,16 38,56 38,86 3,629 7 0,8 1,2253.2 Gauges for threadsThe thread Rd 40 x 1/7 has to be checked with the following gauges:3.2.1 Ring gauges for external threadDimensions in millimetresFigure 6a)Figure 6b): GO-gau
21、ge Figure 6c): NOT GO-gaugeThe gauge shall be capable of being threadedon smoothly.It shall not be possible to pass the gaugecompletely over the thread; it shall engage theinitial thread then bind.Page 6EN 148-1:1999Table 2: Dimensions of gaugesDimensions in millimetresGO-gauge NOT GO-gaugeThreadd1m
22、ax.d2max.manufacturingtolerance ford1 and d2permissible wearford1 and d2hmanufacturingtolerance forhrd3manufacturingtolerance ford3d4 bRd 40 x 1/7 40,00 38,40 + 0,015 + 0,050 3,629 + 0,009 1,225 39,70 + 0,006 72 153.2.2 Plug gauges for internal threadDimensions in millimetresFigure 7a)Figure 7b): GO
23、-gauge Figure 7c): NOT GO-gaugeThe gauge shall be capable of being threadedon smoothly.It shall not be possible to introduce the gaugecompletely over the thread; it shall engage theinitial thread then bind.Page 7EN 148-1:1999Table 3: Dimensions of gaugesDimensions in millimetresGO-gauge NOT GO-gauge
24、Threadd1min.d2min.manufacturingtolerance ford1 and d2permissible wearford1 and d2hmanufacturingtolerance forhrl1 d3manufacturingtolerance ford3l2Rd 40 x 1/7 40,16 38,56 + 0,015 - 0,050 3,629 + 0,009 1,225 15 38,86 + 0,006 10Page 8EN 148-1:1999Annex ZA (informative)Clauses of this European Standard a
25、ddressing essential 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 o
26、ther EU Directives 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.
