ISO INTERNATIONAL STANDARD 21809-5 Secondedition 2017-06 Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems - Part 5: External concrete coatings Industries du pétrole et du gaz naturel - Revetements externes des conduites enterrées ou immergees utilisées dans les systemes de transport par conduites- Partie 5: Revetements externes en béton Reference number IS0 21809-5:2017(E) osi International Organization for Standardization @ IS0 2017 ed without license from IHS IS0 21809-5:2017(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2017, Published in Switzerland All rights reserved. Unless otherwise specified, 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org @ IS0 2017 - All rights reserved networking permited without license from IHS IS0 21809-5:2017(E) Contents Page Foreword ..V Introduction. ..vi 1 Scope. 2 Normative references 3 Terms and definitions 4 Symbols and abbreviated terms. 4.1 Symbols .6 4.2 Abbreviated terms ..6 5 General requirements. 5.1 Rounding. .6 5.2 Compliance with this document 6 Information supplied by the purchaser 6.1 General information. .7 6.2 Additional information 7 7 Materials 7.1 Pipe .7 7.2 Cement 7.3 Supplementary cementitious materials ..8 7.4 Aggregate Fine and coarse. ..9 7.5 Heavyweight aggregate. .9 7.6 Lightweight aggregate .9 7.7 Recycled concrete as aggregate .10 7.8 Water .10 7.9 Steel reinforcement .10 7.10 Concrete admixtures. ..10 7.11 Reclaimed concrete. ..10 8 Concrete mix ..11 9 Coating application .11 9.1 Qualification .11 9.2 Application of concrete coating ..13 9.3 Environmental conditions. ..13 9.4 Pipe ..13 9.4.1 Pre-coated pipe ..13 9.4.2 Bare pipe.. ..14 9.5 Steel reinforcement ..14 9.5.1 General ..14 9.5.2 Cage reinforcement. .14 9.5.3 Welded wire mesh reinforcement ..14 9.5.4 Woven wire mesh reinforcement ..14 9.5.5 Reinforcement placement ..15 9.6 Concrete cutback ..15 9.7 Anode installation. .. 15 10 Curing methods. ..16 11 Inspection and testing ..16 11.1 General, ..16 11.2 Test procedures. ..17 11.2.1 Concrete coating thickness . Diameter measurement .17 11.2.2 Placementofreinforcement .18 11.2.3 Pre-concrete coated pipe weight in air. ..18 11.2.4 Concrete coated pipe weight in air. ..18 ntemaional oganzation @stS2017 - All rights reserved ii ed without license from IHS