ISO INTERNATIONAL STANDARD 8521 Third edition 2020-07 Glass-reinforced thermosetting plastic (GRP) pipes Test methods for the determination of the initial circumferential tensile wall strength Tubes en plastiques thermodurcissables renforcés de verre (PRV) Méthodes d'essai pour la détermination de la résistance a la traction circonférentielle initiale de la paroi Reference number IS0 8521:2020(E) ISO @ISO2020 IS0 8521:2020(E) COPYRIGHT PROTECTED DOCUMENT ISO2020 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 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 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved