ISO INTERNATIONAL STANDARD 20766-6 First edition 2019-05 Road vehicles Liguefied petroleum gas (LPG) fuel systems components - Part 6: Pressure relief valves (PRV) Vehicules routiers - Equipements pour vehicules utilisant le gaz de pétrole liquéfié (GPL) comme combustible - Partie 6: Vannes de controle de la surpression Reference number ISO 20766-6:2019(E) osi @ IS0 2019 IS0 20766-6:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2019 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 on the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address 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: +41 22 749 01 11 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 20766-6:2019(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Markings. 5 Construction and assembly ..2 6 Tests. .2 6.1 Applicability .2 6.2 Hydrostatic strength .3 6.3 Leakage. 3 6.4 Continued operation .3 6.5 Operational test 4 6.5.1 General .4 6.5.2 Test procedure 4 7 Production batch inspection and acceptance testing 4 @ IS0 2019 - All rights reserved ii