ISO INTERNATIONAL STANDARD 7289 Fourth edition 2018-12 Gas welding equipment - Quick- action couplings with shut-off valves for welding, cutting and allied processes Materiel de soudage aux gazRaccords rapides a obturation pour soudage,coupageettechniquesconnexes Reference number IS0 7289:2018(E) ISO @IS02018 IS0 7289:2018(E) COPYRIGHTPROTECTEDDOCUMENT IS02018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's member body in the country of the requester. ISO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+4122749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 7289:2018(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. 2 Normative references 3 Terms and definitions 4 Types of coupling ..1. 5 Installation .2 6 Design requirement .2 6.1 Dimensions,non-interchangeabilityandinterchangeability .2 Configuration .2 6.2 6.3 Coupling and uncoupling 3 .3 6.4 Connections 6.5 Materials. .3 Working requirements. 7 .4 7.1 Pressure resistance. ..4 7.2 Gas tightness 4 7.2.1 General requirements. .4 7.2.2 Specificrequirements. 4 7.3 Pressure drop. 7.4 Resistance to flashback 4 7.5 Resistancetotensileload .4 7.6 Resistance to radial loads 4 7.7 Endurance .5 7.8 Other functions .5 8 General test conditions .5 8.1 General .5 8.2 Test sequence .6 9 Test procedure 7 9.1 Examination of dimensions and test of non-interchangeability and interchangeability 7 9.1.1 Dimensions. 7 9.1.2 Non-interchangeabilitybetweendifferentgastypes 7 9.1.3 Interchangeability within a singlegas type 7 9.2 Pressure resistance .8 9.3 Gas tightness test .8 9.3.1 General. .8 9.3.2 Basic method and test device ..8 9.3.3 Particular specifications .8 9.4 Flashback test. .8 9.5 .8 Resistancetotensileload 9.6 Resistance to radial load 9 9.7 Endurancetest .9 Marking ..9 10 11 Instructions for use .9 Bibliography .10 @ IS0 2018 - All rights reserved ili