ISO/TS TECHNICAL SPECIFICATION 21003-7 Secondedition 2019-04 Multilayer piping systems for hot and cold water installations inside buildings Part 7: Guidance for the assessment of conformity Systemes de canalisations multicouches pour installations d'eau chaude et froide a I'intérieur des batiments Partie 7: Guide pour I'évaluation de la conformite Reference number ISO/TS 21003-7:2019(E) os1 @ IS0 2019 IS0/TS 21003-7:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0/TS 21003-7:2019(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references ..1 3 Terms and definitions ..1 4 Abbreviated terms and symbols 4.1 Abbreviated terms .4 4.2 Symbols ..5 5 General. .5 6 Testing and inspection 5 6.1 Grouping. 5 6.1.1 General. .5 6.1.2 Pressure groups .5 6.1.3 Size groups. .6 6.1.4 Fitting groups 6 6.2 Typetesting 6.3 Batchreleasetest .15 6.4 Process verification tests (PVTs) 16 6.5 Audit tests (AT) .17 6.6 Indirect testing (IT) .17 6.7 Test records. .18 Annex A (informative) Interchangeability of different material grades - Testing of alternative material grades for a layer in a multilayer M-pipe (second sourcing) .19 Bibliography .31 @ IS0 2019 - All rights reserved iii