ISO INTERNATIONAL STANDARD 6246 Third edition 2017-03 Petroleum products Gum content of fuels Jet evaporation method Produits pétroliers - Teneur en gommes des carburants - Methode d'évaporation au jet Reference number IS0 6246:2017(E) International Organization for Standardization @ IS0 2017 =ZHEJIANG INST OF STANDARDIZATION C1 5956617 vided by IHS underI Not for Resale, 2017/5/11 01:36:50 itted without license from IHS IS0 6246:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internatinair PrganizationforStandardization ensee-ZHEJIANG INSTOF STANDARDIzARoISQa7 - All rights reserved Not for Resale, 2017/5/11 01:36:50 etworking permitted without license from IHS IS0 6246:2017(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle .2 5 Reagents. .2 6 Apparatus 7 Assembly of air-jet apparatus ..3 8 Assembly of steam-jet apparatus 9 Calibration ..5 10 Samples and sampling ..5 11 Procedure. .5 12 Calculation of gum content ..7 13 Expressionofresults ..8 13.1 Aviationfuels 13.2 Non-aviation fuels .8 13.3 All fuel types ..8 14 Precision .8 14.1 General .8 14.2 Repeatability,r 14.3 Reproducibility, R ..9 15 Test report .9 Bibliography .10 iii see=ZHEJIANG INST OF STANDARDIZATION C15956617 d without license from IHS