ISO INTERNATIONAL STANDARD 28763 Second edition 2019-08 Vitreous and porcelain enamels Regenerative, enamelled and packed panels for air-gas and gas-gas heat exchangers - Specifications Emaux vitrifiés - Echangeurs thermiques pour reéchauffeurs air- gaz et gaz-gaz a empilement de panneaux émailles remplacables et démontables-Spécifications Reference number IS0 28763:2019(E) @ IS0 2019 IS0 28763:2019(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