ISO INTERNATIONAL STANDARD 23856 First edition 2021-06 Plastics piping systems for pressure and non-pressure water supply, drainage or sewerage - Glass- reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin Systemes de canalisations en matieres plastiques pour I'alimentation en eau, les branchements et les collecteurs d'assainissement avec ou sans pression - Systemes en plastiques thermodurcissables renforcés de verre (PRV) a base de résine de polyester non saturé (UP) Reference number IS0 23856:2021(E) ISO @ISO 2021 IS0 23856:2021(E) COPYRIGHT PROTECTED DOCUMENT @ iS0 2021 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 0111 Email: [email protected] Website: www.iso.org Published in Switzerland i @ IS0 2021 - All rights reserved