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 0-626-14613-5 SANS 50144-1:2003 Edition 2 EN 144-1:2000 Edition 2 SOUTH AFRICAN NATIONAL STANDARD Respiratory protective devices Gas c
4、ylinder valves Part 1: Thread connections for insert connector This national standard is the identical implementation of EN 144-1:2000 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 pre
5、toria 0001 tel: 012 428 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa 2003 SANS 50144-1:2003 Edition 2 EN 144-1:2000 Edition 2 Table of changes Change No. Date Scope National foreword This South African standard was approved by National Committee STANSA SC
6、 5120.11D, 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 144-1:1991). EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 144-1August 2000ICS 13.340.30 Su
7、persedes EN 144-1:1991English versionRespiratory protective devices - Gas cylinder valves - Part 1:Thread connections for insert connectorAppareils de protection respiratoire - Robinets de bouteille gaz - Partie 1: Raccords de queue filetsAtemschutzgerte - Gasflaschenventile - Teil 1:Gewindeverbindu
8、ng am EinschraubstutzenThis European Standard was approved by CEN on 27 July 2000.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and b
9、ibliographical references concerning such nationalstandards 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 language made by translationunder the responsibility o
10、f 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 Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
11、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCentral Secretariat: rue de Stassart, 36 B-1050 Brussels 2000 CEN All rights of exploitation in any form and by any means reservedworldwide fo
12、r CEN national Members.Ref. No. EN 144-1:2000 EPage 2EN 144-1:2000ForewordThis European Standard has been prepared by Technical Committee CEN/TC 79 “Respiratory protectivedevices“, the secretariat of which is held by DIN.This European Standard replaces EN 144-1:1991.This European Standard shall be g
13、iven the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by February 2001, and conflicting national standards shall be withdrawnat the latest by February 2001.This European Standard has been prepared under a mandate given to CEN by the Europe
14、an Commissionand the European Free Trade Association, and supports essential requirements of EU Directive(s).For relationship 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 organizat
15、ions of the followingcountries 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 3EN 144-1:2000Introducti
16、onIn recognition of the very high number of cylinders throughout Europe using threads of existing nationaldesign and the high costs that would be caused by the unnecessary early replacement of these, it wasacknowledged that a 10 year transitional period will be required to phase in cylinders using t
17、he threaddescribed in this standard. During the ensuing period cylinders may be supplied with threads to the existingnational design or to the standard described herein.CEN/TC 79 recognizes that work is in hand to produce EN ISO standards. At the time this standardwas prepared the proposed EN ISO st
18、andards were available as drafts. If when EN 144-1 is nextrevised and the EN ISO standards have been published, consideration may be given to adopting theEN ISO standards in place of EN 144-1.1 ScopeThis European Standard applies to the connection between a gas cylinder valve and a gas cylinder forr
19、espiratory protective devices.It specifies the dimensions and tolerances for thread connections to be used for respiratory protectivedevices and contains requirements for impact resistance for the connection between a gas cylinder and a gascylinder valve.Page 4EN 144-1:20002 Connection on insert con
20、nector2.1 Connection with parallel thread M 18 x 1,5Dimensions in millimetresa The venting hole shall be replaced by a venting groove if the valve is equipped with a pressure limitingdevice.Key1) 17,85 to 18,02) 22 to 243) Maximum groove depth 1,0 below root diameter of thread4) Venting groove. Widt
21、h of groove: 2 max. run out at choice of manufacturer5) Thread runout to be compatible with Dimension A of figure 3Figure 1 - Insert connectorFigure 2 - O-ringPage 5EN 144-1:2000Key1) 3 to 52) Dimension AFigure 3 - Neck of cylinder2.2 Connection with parallel thread M 25 x 2Dimensions in millimetres
22、a The venting hole shall be replaced by a venting groove if the valve is equipped with a pressure limitingdevice.Key1) 24,8 to 25,02) 25 to 273) Maximum groove depth 1,0 below root diameter of thread4) Venting groove. Width of groove: 2 max. run out at choice of manufacturer5) Thread runout to be co
23、mpatible with Dimension A of figure 6Figure 4 - Insert connectorPage 6EN 144-1:2000Figure 5 - O-ringKey1) 3 to 52) Dimension AFigure 6 - Neck of cylinder2.3 Connection with conical thread E 17 conDimensions in millimetresKey1 Threaded insert connector2 Neck of cylinder1) Depth of insertFigure 7 - In
24、sert connector with neck of cylinderPage 7EN 144-1:2000Figure 8 - Insert connectorFigure 9 - Neck of cylinderPage 8EN 144-1:2000Dimensions in millimetresKey1) Maximum dimension insert connector2) Nominal dimension insert connector3) Nominal dimension gas cylinder4) Minimum dimension gas cylinder5) S
25、urface of taper6) Internal thread7) External thread8) Axis of threadFigure 10 - Connection with conical thread E 17 conTable 1 - Thread dimensionsGas cylinder valve External thread (insert connector) Internal thread (gas cylinder)MajordiameterPitchdiameterMinordiameter MajordiameterMajordiameterPitc
26、hdiameterMinordiameterDimensions of d d2d1d3l1DD2D1l2thread + 0,12 + 0,12 + 0,12 + 0,12 0 0 0 minNominal dimension 0 0 0 0 - 0,12 - 0,12 - 0,12E 17 con 19,8 18,638 17,476 17,4 21 19,2 18,038 16,878 17Thread: Right-hand thread, taper 3:25, 14 turns of thread on 25,4 mm, below 90 cut to surface of tap
27、erPage 9EN 144-1:20003 Impact resistance3.1 RequirementsThe connection between the gas cylinder and the gas cylinder valve used for compressed gas breathingapparatus shall withstand an impact energy of 120 J without separation.3.2 TestingFor the purpose of this test the valve body only shall be used
28、. Two valve bodies shall be tested. The valvebody shall be fitted into a test block or a cylinder, equipped with the corresponding screw thread to themanufacturers specified torque.The valve body shall protrude by the same nominal amount as in service.The valve body shall be impacted by a striker in
29、corporating a hardened steel ball of diameter (13 0,5) mm, which has a minimum velocity of 3 m/s and an impact energy of 120 J. The impact shall be at 90 to the longitudinal axis of the valve body and coincident with a plane passing through the same axis.The point of impact shall be two thirds the d
30、istance (L) from the plane where the valve stem thread meets thetest block or the cylinder to the furthest point of the valve body, measured along the longitudinal axis of thevalve body (see figure 11).The point of impact on the valve body shall not be obscured by features such as outlet connection
31、threads,bursting disc holder, etc.The valve body shall be struck once only and shall withstand the impact energy of 120 J. Distortion due toimpact is permissible.After testing, the valve body shall be removed from the test rig and shall be visually inspected. Totalseparation shall not have taken pla
32、ce.Key1 Test block manufactured from steel which simulates cylinder neck or cylinder2 Valve body3 13 mm diameter hardened steel ballFigure 11 - Impact testPage 10EN 144-1:20004 MarkingThe valve body meeting the requirements of this standard shall be marked with:4.1 The number of this European Standa
33、rd4.2 The name, trademark or other means of identification of the manufacturer4.3 Date of manufacture (at least the year)4.4 Type-identificationM 18 orM 25 orE 17 con5 Information supplied by the manufacturerOn delivery, information shall make reference to the information supplied by the manufacture
34、r for that device,where a cylinder valve is used.Page 11EN 144-1:2000Annex ZA(informative)Clauses of this European Standard addressing essential requirementsor other provisions of EU DirectivesThis European Standard has been prepared under a mandate given to CEN by the EuropeanCommission and the Eur
35、opean Free Trade Association and supports essential requirements of EUDirective 89/686/EEC.WARNING: Other requirements and other EU Directives may be applicable to the products fallingwithin the scope of this European Standard.The clauses of this European Standard are likely to support requirements
36、of Directive 89/686/EEC,Annex II:Table ZA.1EU Directive 89/686/EEC, Annex II Clauses of this European Standard1.1.2.1 31.2.1.1 2, 31.3.2 31.4 52.8 33.1 3Compliance with this standard provides one means of conforming with the specific essentialrequirements of the Directive concerned and associated EFTA regulations.
