1、DEUTSCHE NORM April 199! DIN Respiratory protective devices Threads for facepieces English version of DIN EN 148-1 EN 148-1 Part 1 : Standard thread connection ICs 13.340.30 Supersedes DIN 3183-2, May 1988 edition. Atemschutzgerte - Gewinde fr Atemanschlsse - Teil 1: Rund- gewindeanschlu European St
2、andard EN 148-1 : 1999 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 79. The responsible German body involved in its preparation was the Normenausschu Feinmechanik und Optik (Optics and Precision Mechanics Standar
3、ds Committee). Amendments DIN 3183-2, May 1988 edition, has been superseded by the specifications of EN 148-1 Previous editions DIN 3182: 1932-1 O, 1937-09; DIN 31 82-1 : 1957-09; DIN 31 82-2: 1957-09; DIN 31 82-3: 1957-09; DIN 3183: 1932-10, 1937-06, 1944-07, 1961-11; DIN 3183-2: 1981-06, 1988-05.
4、EN comprises 7 pages. No part of this standard may be reproduced without the prior permission of Ref. No. DIN EN 148-1 : 1999-0 hl Deutsches Institut fur Normung e. V., Berlin. buth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 08
5、 Sales No. 1108 09.99 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 148-1 February 1999 ICs 13.340.30 Supersedes EN 148-1 : 1987. English version Respiratory protect ive devices Threads for facepieces Part 1 : Standard thread connection Appareils de protection respiratoire - Filetages pour pi
6、ces faciales - Partie 1 : Raccord filetage standard Atemschutzgerte - Gewinde fr Atemanschlsse - Teil 1 : Rund- gewindeanschlu This European Standard was approved by CEN on 1999-01 -08. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving
7、 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. The European Standards exist in three official versions
8、 (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 standards bodies of Austria, Belgium, the
9、Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secr
10、etariat: rue de Stassart 36, B-1050 Brussels O 1999. CEN - All rights of exploitation in any form and by any means reserved worldwide for CEN national members. Ref. No. EN 148-1 : 1999 E Page 2 EN 148-1 : 1999 Foreword This European Standard has been prepared by Technical Comittee CEN/TC 79 Respirat
11、ory protective devices, the Secretariat of which is held by DIN. It is identical to the 1987 edition which was approved under the old CEN rules, with the approved Corrigendum EN 148-1 : 1987/AC: 1992 incorporated (see heading of column 4 in table l), but with no other technical changes made. This Eu
12、ropean 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 the relevant EU Directive. For relationship with EU Directive, see informative Annex ZA. This European Standard shall be given the
13、 status of a national standard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by August 1999 at the latest. In accordance with the CENKENELEC Internal Regulations, the national standards organization of the following countries are bound t
14、o implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. Page 3 EN 148-1 : 1999 1 Scope This European Standard is ap
15、plicable 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) Dimensions in millimetres 2.1 External thread 2.1.1 Without socket for filters (CA) Screw-in depth H
16、lG,Smin. surface section lefi to the choice of the manufacturer Figure 1 2.1.2 With socket for equipment connectors other than for filters (CAT) Dimensions in millimetres 1L,5mn Thread up to edge *) Specification see clause 3 *x - Sealing surface section left to the choice of the manufacturer 116mm
17、1 Figure 2 Page 4 EN 148-1 : 1999 2.2 internal thread Thread up to Figure 3a) 2.3 Gasket 3 Threads 3.1 Dimensions of threads Gasket Dimensions in millimetres Detail X (left to the choice of the manufacturer) NOTE: if z 5 1,5 + il Figure 3b) Figure 4 Figure 3c) Dimensions in millimetres Figure 5 *) S
18、pecification see clause 3 Page 5 EN 148-1 : 1999 External thread Major Minor diameter diameter Thread Internal thread Major Minor diameter diameter Rd 40 x 117 Table 1 : Thread limits Dimensions in millimetres Thread limits min. min. Pitch Number of threads Per 25,4 2 7 Thread height ti 03 Radius r
19、1,225 3.2 Gauges for threads The thread Rd 40 x 1/7 has to be checked with the following gauges: 3.2.1 Ring gauges for external thread Dimensions in millimetres Figure sa) Figure 6b): GO-gauge The gauge shall be capable of being threaded on smoothly. Figure 6c): NOT GO-gauge It shall not be possible
20、 to pass the gauge completely over the thread; it shall engage the initiai thread then bind. Page 6 EN 148-1 : 1999 GO-gauge Table 2: Dimensions of gauges NOT GO-gauge Dimensions in millimetres Thread Rd40x ln manufacturing permissible wear manufacturing manufacturing d1 d2 tolerance for for h toler
21、ance for r d3 tolerance for dq b max. max. dl anddz dl and d2 h d3 40,OO 38,40 iO,O15 + 0,050 3,629 0,009 1,225 39,70 5 0,006 72 15 3.2.2 Plug gauges for internal thread Dimensions in millimetres Figure 7a) End of thread rounded Handle ES 16 +-A Handle ES 16 1 90 Figure 7b): GO-gauge The gauge shall
22、 be capable of being threaded on smoothly. Figure 7c): NOT GO-gauge It shall not be possible to introduce the gauge completely over the thread; it shall engage the initial thread then bind. Page 7 EN 148-1 : 1999 manufacturing tolerance for r II h - + 0,009 1,225 15 Table 3: Dimensions of gauges man
23、ufacturing d3 tolerance for 12 d3 38,06 0,006 10 Dimensions in millimetres NOT GO-gauge I Thread I GO-gauge manufacturing permissible wear dl d2 tolerance for for h min. min. dl and d2 di and d2 Rd 40x ln 40,16 38,56 0,015 - 0,050 3,629 EU Directive 89/686/EEC, Annex II: 1.2.1 1.3.3 2.8 Annex ZA (in
24、formative) Clauses of this standard: 2 2 2 9 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
25、 essential requirements of EU Directive 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: 13.10.1 12 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.
