ISO INTERNATIONAL STANDARD 13704 Third edition 2022-10 Petroleum, petrochemical and natural gas industries - Calculation of heater- tube thickness in petroleum refineries Industries du pétrole,de lapetrochimie et dugaz naturel-Calculde I'épaisseurdestubes defoursderaffineries depeétrole Referencenumber IS013704:2022(E) ISO ISO 2022 IS0 13704:2022(E) COPYRIGHTPROTECTEDDOCUMENT ISO2022 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 anyform or by anymeans, electronic or mechanical, including photocopying, orposting on theinternetoran intranet,withoutpriorwrittenpermission.Permissioncanberequestedfrom eitherIsoattheaddressbelow or ISO's member body in the country of the requester. ISO copyright office CP401 : Ch.de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +4122 749 0111 Email: [email protected] Website:www.iso.org Published in Switzerland ii @IS0 2022-All rights reserved