1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 148-1:1999 The Euro
2、pean Standard EN 148-1:1999 has the status of a British Standard ICS 13.340.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Respiratory protective devices Threads for facepieces Part 1: Standard thread connectionThis British Standard, having been prepared under the directio
3、n of the Sector Committee for Health and Environment, was published under the authority of the Standards Committee and comes into effect on 15 July 1999 BSI 07-1999 ISBN 0 580 32263 7 BS EN 148-1:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard
4、is the English language version of EN 148-1:1999. 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
5、 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. A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references
6、 The British Standards which 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.
7、 A British Standard does not 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
8、 a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1999 CEN All rights o
9、f exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 148-1:1999 E EUROPEAN STANDARD EN 148-1 NORME EUROPE ENNE EUROPA ISCHE NORM February 1999 ICS 13.340.30 Supersedes EN 148-1:1987 Descriptors: respiratory protective equipment, personal protective equ
10、ipment, accident prevention, junctions, threaded fittings, screw threads, dimensions English version Respiratory protective devices Threads for facepieces Part 1: Standard thread connection Appareils de protection respiratoire Filetages pour pie ces faciales Partie 1: Raccord a filetage standard Ate
11、mschutzgera te Gewinde fu r Atemanschlu sse Teil 1: Rundgewindeanschlu This European Standard was approved by CEN on 8 January 1999. 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 sta
12、ndard 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
13、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, Gree
14、ce, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 148-1:1999 BSI 07-1999 Foreword This European Standard has been prepared by Technical Committee CEN/TC 79, Respiratory protective devices, the Secretariat of which is held
15、by DIN. This European Standard supersedes EN 148-1:1987. 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 August 1999, and conflicting national standards shall be withdrawn at the latest by August
16、1999. It is identical to the 1987 edition which was approved under old CEN rules, with the approved Corrigendum EN 148-1:1987/AC:1992 incorporated (see heading column 4 in Table 3.1), but with no other technical changes. This European Standard has been prepared under a mandate given to CEN by the Eu
17、ropean Commission and the European Free Trade Association, and supports essential requirements of Directive 89/686/EEC. For relationship(s) 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 stan
18、dards 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.Page 3 EN 1
19、48-1:1999 BSI 07-1999 *) Specification see clause 3. 1 Scope This European Standard is applicable to standard threads for respiratory protective devices. This standard does not apply to diving equipment and to positive pressure demand breathing apparatus. 2 Standard thread connector (C) 2.1 External
20、 thread 2.1.1 Without socket for filters (CA) Dimensions in millimetres Figure 1 2.1.2 With socket for equipment connectors other than for filters (CAT) Dimensions in millimetres Figure 2Page 4 EN 148-1:1999 BSI 07-1999 *) Specification see clause 3. 2.2 Internal thread Dimensions in millimetres Fig
21、ure 3a) Figure 3b) Figure 3c) 2.3 Gasket Dimensions in millimetres Figure 4 3 Threads 3.1 Dimensions of threads Figure 5Page 5 EN 148-1:1999 BSI 07-1999 Table 1 Thread limits Dimensions in millimetres Thread limits Pitch Number of threads per 25,4 Thread height Radius External thread Internal thread
22、 Thread Major diameter Minor diameter Major diameter Minor diameter d 1 d 2 D 1 D 2 hzt 1 r max. min. max. min. min. max. Rd 403 1/7 40,00 39,70 38,40 40,16 38,56 38,86 3,629 7 0,8 1,225 3.2 Gauges for threads The thread Rd 403 1/7 has to be checked with the following gauges. 3.2.1 Ring gauges for e
23、xternal thread Dimensions in millimetres Figure 6a)Page 6 EN 148-1:1999 BSI 07-1999 Dimensions in millimetres Figure 6b) GO-gauge Figure 6c) NOT GO-gauge The gauge shall be capable of being threaded on smoothly. It shall not be possible to pass the gauge completely over the thread; it shall engage t
24、he initial thread then bind. Table 2 Dimensions of gauges Dimensions in millimetres GO-gauge NOT GO-gauge Thread d 1 d 2 manufacturing tolerance for permissible wear for h manufacturing tolerance for rd 3 manufacturing tolerance for d 4 b max. max. d 1 and d 2 d 1 and d 2 hd 3 Rd 403 1/7 40,00 38,40
25、 0,015 + 0,050 3,629 0,009 1,225 39,70 0,006 72 15Page 7 EN 148-1:1999 BSI 07-1999 3.2.2 Plug gauges for internal thread Dimensions in millimetres Figure 7a) Dimensions in millimetres Figure 7b) GO-gauge Figure 7c) NOT GO-gauge The gauge shall be capable of being threaded on smoothly. It shall not b
26、e possible to introduce the gauge completely over the thread; it shall engage the initial thread then bind. Table 3 Dimensions of gauges Dimensions in millimetres GO-gauge NOT GO-gauge Thread d 1 d 2 manufacturing tolerance for permissible wear for h manufacturing tolerance for rl 1 d 3 manufacturin
27、g tolerance for l 2 min. min. d 1 and d 2 d 1 and d 2 h d 3 Rd 403 1/7 40,16 38,56 0,015 2 0,050 3,629 0,009 1,225 15 38,86 0,006 10 BSI 07-1999 Page 8 EN 148-1:1999 Annex ZA (informative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives This E
28、uropean 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 89/686/EEC. WARNING Other requirements and other EU Directives may be applicable to the products falling within the s
29、cope of this standard. The following clauses of this standard are likely to support requirements of Directive 89/686/EEC, Annex II: EU Directive 89/686/EEC, Annex II: Clauses of this standard: 1.2.1 2 1.3.3 2 2.8 2 2.10 2 3.10.1 2 Compliance with the clauses of this standard provides one means of co
30、nforming with the specific essential requirements of the Directive concerned and associated EFTA regulations.blankBS EN 148-1:1999 BSI 389 Chiswick High Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
31、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the
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