International ISO Standard IS015665 Second edition Acoustics Acoustic insulation for pipes, valves and flanges 2023-12 Acoustique - Isolation acoustique des tuyaux, clapets et brides Reference number IsO15665:2023(en) @ ISO 2023 IS0 15665:2023(en) COPYRIGHT PROTECTED DOCUMENT @IS02023 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 ofthe requester. ISO copyright office CP 40i: Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland @IS02023-Allrightsreserved i