ISO INTERNATIONAL STANDARD 21809-4 First edition 2009-11-15 Petroleum and natural gas industries - External coatings for buried or submerged pipelines used in pipeline transportation systems- Part 4: Polyethylene coatings (2-layer PE) Industriesdupetrole et du gaz naturelRevetements externes des conduitesenterreesou immergees utiliseesdansles systemes de transportparconduites- Partie4:Revetementsa base depolyethylene (PEbicouche) Reference number ISO 21809-4:2009(E) @ISO 2009 Copyright Intemational Organization for Standardization Not for Resale ISO21809-4:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, Iso's member body in the country of the requester. ISO copyright office Case postale 56.CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ISO2009All rights reserved without license from IHS Not for Resale ISO21809-4:2009(E) Contents Page Foreword. Introduction ..vi 1 Scope.. 2 Normative references 3 Terms and definitions .. 4 Abbreviated terms... 5 General requirements .. 5.1 Rounding.... 5.2 CompliancewiththispartofISo21809 6 Informationsuppliedbythepurchaser.. 6.1 General information... 6.2 Additional information 7 Coating classification 7.1 General, 7.2 Coating systems.. 7.3 Coatingthicknessclasses. 6 8 Materials 6 8.1 Pipe. 8.2 Coating materials 8.3 Packaging.... 9 Coating qualification... 10 Application 10 10.1 General.. 10 10.2 Surface preparation. 10 10.3 Pipe temperature. 11 10.4 Applicationofadhesive. 10.5 Application of polyethylene.... 11 10.6 Cutback... 11 Inspectionandtesting 11.1 Inspection. 11.2 Testing..... 11 12 Repair of coated pipe..... 12.1 Rectification of below-thickness coating... 14 12.2 Repair...... 15 12.3 Stripping and recoating 15 13 Markings. 15 13.1 General ...... 13.2 Required markings... .15 14 Handling and storage in the coating area... .15 14.1 Handling .... 15 14.2 15 Test reports and certificates of compliance........ 16 Annex A (normative) UV ageing test and thermal ageing test. 17 ili thout ficense from IHS Not for Resale ISO21809-4:2009(E) AnnexB(normative)Cathodic disbondmenttest. Annex C (normative)Impacttest.. AnnexD (normative)Indentationtest... Annex E (normative)Flexibilitytest. Annex F(normative) Peel strength test Annex G (normative) Peel strength testHanging mass . Bibliography... ISo 2009 -All rights reserved Not for Resale ISO21809-4:2009(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (iSO member bodies). The work of preparing International Standards is normally carried out through ISO non-governmental, in liaison with IsO, also take part in the work. IsoO collaborates closely y with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75% of the member bodies casting a