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The International Standard for 2LPE anti-corrosion coating. Description of Properties and Application Procedure.

Transcript of ISO 21809-4-2009 - 2LPE

Reference numberISO 21809-4:2009(E)

ISO 2009

INTERNATIONAL STANDARD

ISO21809-4

First edition2009-11-15

Petroleum and natural gas industries External coatings for buried or submerged pipelines used in pipeline transportation systems Part 4: Polyethylene coatings (2-layer PE)

Industries du ptrole et du gaz naturel Revtements externes des conduites enterres ou immerges utilises dans les systmes de transport par conduites

Partie 4: Revtements base de polythylne (PE bicouche)
ISO 21809-4:2009(E)

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COPYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester.

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Published in Switzerland

ii ISO 2009 All rights reserved
ISO 21809-4:2009(E)

ISO 2009 All rights reserved iii

Contents Page

Foreword .............................................................................................................................................................v Introduction........................................................................................................................................................vi 1 Scope ......................................................................................................................................................1 2 Normative references............................................................................................................................1 3 Terms and definitions ...........................................................................................................................2 4 Abbreviated terms .................................................................................................................................4 5 General requirements ...........................................................................................................................4 5.1 Rounding................................................................................................................................................4 5.2 Compliance with this part of ISO 21809 ..............................................................................................4 6 Information supplied by the purchaser...............................................................................................4 6.1 General information ..............................................................................................................................4 6.2 Additional information ..........................................................................................................................5 7 Coating classification ...........................................................................................................................5 7.1 General ...................................................................................................................................................5 7.2 Coating systems....................................................................................................................................5 7.3 Coating thickness classes....................................................................................................................6 8 Materials .................................................................................................................................................6 8.1 Pipe .........................................................................................................................................................6 8.2 Coating materials ..................................................................................................................................7 8.3 Packaging...............................................................................................................................................9 9 Coating qualification .............................................................................................................................9 10 Application ...........................................................................................................................................10 10.1 General .................................................................................................................................................10 10.2 Surface preparation.............................................................................................................................10 10.3 Pipe temperature .................................................................................................................................11 10.4 Application of adhesive ......................................................................................................................11 10.5 Application of polyethylene................................................................................................................11 10.6 Cutback.................................................................................................................................................11 11 Inspection and testing ........................................................................................................................11 11.1 Inspection.............................................................................................................................................11 11.2 Testing..................................................................................................................................................11 12 Repair of coated pipe ..........................................................................................................................14 12.1 Rectification of below-thickness coating..........................................................................................14 12.2 Repair....................................................................................................................................................15 12.3 Stripping and recoating ......................................................................................................................15 13 Markings...............................................................................................................................................15 13.1 General .................................................................................................................................................15 13.2 Required markings ..............................................................................................................................15 14 Handling and storage in the coating area.........................................................................................15 14.1 Handling ...............................................................................................................................................15 14.2 Storage .................................................................................................................................................16 15 Test reports and certificates of compliance .....................................................................................16 Annex A (normative) UV ageing test and thermal ageing test .....................................................................17
ISO 21809-4:2009(E)

iv ISO 2009 All rights reserved

Annex B (normative) Cathodic disbondment test .........................................................................................19 Annex C (normative) Impact test .....................................................................................................................24 Annex D (normative) Indentation test .............................................................................................................26 Annex E (normative) Flexibility test ................................................................................................................27 Annex F (normative) Peel strength test ..........................................................................................................29 Annex G (normative) Peel strength test Hanging mass ...........................................................................31 Bibliography ......................................................................................................................................................34