ISO INTERNATIONAL STANDARD 21905 First edition 2020-03 Gas turbine exhaust svstems with or without waste heat recovery Systemes d'eéchappement des turbines a gaz avec ou sans reécupération de la chaleur résiduelle Reference number IS0 21905:2020(E) ISO IS02020 IS0 21905:2020(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2020 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved