BS EN 148-2-1999 Respiratory protective devices threads for facepieces - Centre thread connection《呼吸保护设备 面具用螺纹 中心螺纹连接》.pdf

1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 148-2:1999 The Euro

2、pean Standard EN 148-2:1999 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 2: Centre thread connectionThis British Standard, having been prepared under the direction

3、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 32264 5 BS EN 148-2:1999 Amendments issued since publication Amd. No. Date Comments National foreword This British Standard is

4、 the English language version of EN 148-2:1999. 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 e

5、nquiries 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 T

6、he 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. A

7、 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 a

8、 front cover, an inside front cover, the EN title page, pages 2 to 6, 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 of

9、exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 148-2:1999 E EUROPEAN STANDARD EN 148-2 NORME EUROPE ENNE EUROPA ISCHE NORM February 1999 ICS 13.340.30 Supersedes EN 148-2:1987 Descriptors: respiratory protective equipment, personal protective equip

10、ment, accident prevention, junctions, threaded fittings, screw threads, dimensions English version Respiratory protective devices Threads for facepieces Part 2: Centre thread connection Appareils de protection respiratoire Filetages pour pie ces faciales Partie 2: Raccord a filetage central Atemschu

11、tzgera te Gewinde fu r Atemanschlu sse Teil 2: Zentralgewindeanschlu 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 stand

12、ard 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 la

13、nguage 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, Greece

14、, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 148-2:1999 BSI 07-1999 Foreword This European Standard has been prepared by the Technical Committee CEN/TC 79, Respiratory protective devices, the Secretariat of which is hel

15、d by DIN. This European Standard supersedes EN 148-2:1987. 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 Augus

16、t 1999. Corrigendum EN 148-2:1987/AC:1992 was incorporated (see heading column 4 in table in clause 5), but with no other technical changes. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essentia

17、l 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 standards organizations of the following countries are bound to implement this Europ

18、ean 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 148-2:1999 BSI 07-1999 *) Specification see clause 5 1 Scope This European Standa

19、rd is applicable to centre threads for respiratory protective devices. This standard does not apply to diving equipment and to positive pressure demand breathing apparatus. 2 Centre thread connector (A) for CO 2 -absorbing cartridges 2.1 Coupling elbow AA Dimensions in millimetres Figure 1a) Figure

20、1b) 2.2 Gasket Dimensions in millimetres Figure 2Page 4 EN 148-2:1999 BSI 07-1999 *) Specification see clause 5. 3 Centre thread connector (B) for equipment connector 3.1 Coupling elbow BA Dimensions in millimetres 3.2 Gasket Dimensions in millimetres Figure 4Page 5 EN 148-2:1999 BSI 07-1999 *) Spec

21、ification see clause 5. 4 Thread bridge AB (for connector A and B) Dimensions in millimetres 5 Dimensions for thread 5/16 Table 1 Dimensions in millimetres Thread limits External thread Internal Thread Pitch Number of threads per 25,4 Thread height Thread Major diameter Pitch diameter Minor diameter

22、 Major diameter Pitch diameter Minor diameter 5/16 max. min. max. min. max. min. max. min. max. min. max. min. 7,937 7,805 7,033 6,962 6,129 5,979 7,937 7,139 7,033 6,588 6,129 1,411 18 0,904 NOTE Thread 5/16 is described in British Standard BS 84-1956. BSI 07-1999 Page 6 EN 148-2:1999 Annex ZA (inf

23、ormative) Clauses of this European Standard addressing essential requirements or other provisions of EU Directives This European 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 Direct

24、ive 89/686/EEC. WARNING Other requirements and other EU Directives may be applicable to the products falling within the scope 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 th

25、is standard 1.2.1 2, 3, 4 1.3.3 2, 3, 4 2.8 2, 3, 4 2.10 2, 3, 4 3.10.1 2, 3, 4 Compliance with the clauses of this standard provides one means of conforming with the specific essential requirements of the Directive concerned and associated EFTA regulations.blankBS EN 148-2:1999 BSI 389 Chiswick Hig

26、h Road London W4 4AL | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BSI British Standards Ins

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