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TS 0440 Cathodic Protection Part 1

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TS 0440 Cathodic Protection Part 1 Engineering Technical Standard TS 0440 Cathodic Protection Part 1 - Pipelines Version: 2.0 Date: 28 February 2019 Status: Issue Document ID: SAWS-ENG-0440 © 2019 SA Water Corporation. All rights reserved. This document may contain confidential information of SA Water Corporation. Disclosure or dissemination to unauthorised individuals is strictly prohibited. Uncontrolled when printed or downloaded. Engineering - TS 0440 – Cathodic Protection Part 1 - Pipelines SA Water - Technical Standard Copyright This Standard is an intellectual property of the South Australian Water Corporation. It is copyright and all rights are reserved by SA Water. No part may be reproduced, copied or transmitted in any form or by any means without the express written permission of SA Water. The information contained in this Standard is strictly for the private use of the intended recipient in relation to works or projects of SA Water. This Standard has been prepared for SA Water’s own internal use and SA Water makes no representation as to the quality, accuracy or suitability of the information for any other purpose. Application & Interpretation of this Document It is the responsibility of the users of this Standard to ensure that the application of information is appropriate and that any designs based on this Standard are fit for SA Water’s purposes and comply with all relevant Australian Standards, Acts and regulations. Users of this Standard accept sole responsibility for interpretation and use of the information contained in this Standard. Users should independently verify the accuracy, fitness for purpose and application of information contained in this Standard. Only the current revision of this Standard should be used which is available for download from the SA Water website. Significant/Major Changes Incorporated in This Edition Update Technical Standards and SA Water drawing numbers Section 4.5.4.1 - IR free coupons and new CP standard drawings were added Section 4.5.4.2 – Deepwell anode beds were added Section 4.8.2 – Plastic Test Points were added Section 4.8.9 – Test Points for Flowmeters and motorised valves were added Section 5.5 – Pricing Schedule section was removed Section 6.3 – DCVG Testing was removed Section 7.3 – Additional information about interference testing was added Table 9.1 – Depolarisation Testing was added Revision 2.0 - 28 February 2019 Document ID: SAWS-ENG-0440 Page 2 of 47 Engineering - TS 0440 – Cathodic Protection Part 1 - Pipelines SA Water - Technical Standard Document Controls Revision History Revision Date Author Comments 1.0 05/07/17 P. Vince First Edition 2.0 27/02/19 R. Salazar Romero Second Edition Template: Technical Standard Version 6.00, 10/05/2016 Approvers Role Signature and Date Responsible Discipline Lead 2 7 /0 2 /2 0 1 9 Principal Engineer Materials Kingsley Brown X Signer's Name Signed by: BR003764 Manager Engineering Technical Services 4 / 0 4 / 2 0 1 9 Murat Aksoy X Signer's Name Signed by: AK003305 Senior Manager Engineering Services 1 5 /0 4 /2 0 1 9 Richard Gray X Signer's Name Signed by: GR001964 Reviewers Role Name Revision Review Date Senior Engineer Materials and CP Ramon Salazar Romero 2.0 27/02/19 Senior Asset Planner - Strategic David Welsh 2.0 27/02/19 Graduate Engineer – Materials Science Matt Rolfe 2.0 27/02/19 Revision 2.0 - 28 February 2019 Document ID: SAWS-ENG-0440 Page 3 of 47 Engineering - TS 0440 – Cathodic Protection Part 1 - Pipelines SA Water - Technical Standard Contents 1 Introduction ........................................................................................................ 7 1.1 Purpose ............................................................................................................... 7 1.2 Glossary .............................................................................................................. 7 1.3 Abbreviations .................................................................................................... 8 1.4 References ......................................................................................................... 9 1.4.1 Australian and International ....................................................................... 9 1.4.2 SA Water Documents................................................................................... 9 1.5 Definitions .........................................................................................................10 2 Scope ............................................................................................................... 12 2.1 Exclusions ..........................................................................................................12 3 Qualifications of Personnel ............................................................................. 13 4 Cathodic Protection System Design .............................................................. 14 4.1 General ............................................................................................................14 4.2 Protection Criteria ...........................................................................................14 4.3 Cathodic Protection System Type Selection ...............................................14 4.3.1 When should cathodic protection be provided? .................................15 4.3.2 Type of CP system ......................................................................................15 4.4 Minimum Design Life .......................................................................................16 4.5 Impressed Current System Design ................................................................16 4.5.1 System Layout .............................................................................................16 4.5.2 TR Location Selection Criteria ...................................................................16 4.5.3 Anode Bed Location Selection Criteria ..................................................17 4.5.4 Anode Bed Design .....................................................................................18 4.5.5 DC Power Supply ........................................................................................19 4.5.6 Telemetry .....................................................................................................19 4.5.7 AC Power Connection ..............................................................................19 4.5.8 TR Earthing ...................................................................................................19 4.6 Sacrificial Anode System Design ...................................................................19 4.6.1 Anode Location Selection ........................................................................20 4.6.2 Anode design .............................................................................................20 4.6.3 Sacrificial Anode Materials .......................................................................20 4.6.4 System Layout .............................................................................................21 4.7 Cathode Connection ....................................................................................21 4.8 Test Points .........................................................................................................21 4.8.1 Test point selection .....................................................................................21 4.8.2 Test point construction type selection.....................................................21 4.8.3 Test point numbering system ....................................................................22 4.9 Electrical Continuity ........................................................................................23 4.10 Electrical Isolation ...........................................................................................24 4.10.1 Electrical Hazards at Insulating Joints ......................................................25 Revision 2.0 - 28 February 2019 Document ID: SAWS-ENG-0440 Page 4 of 47 Engineering - TS 0440 – Cathodic Protection Part 1 - Pipelines SA Water - Technical Standard 4.11 Low Frequency Induction and Earth Potential Rise ...................................26 4.12 Casings .............................................................................................................26 4.13 Detailed Design Report and Calculations...................................................27 4.13.1 Detailed Design Report Typical Contents ...............................................27 4.14 Design Verification ..........................................................................................30 5 For Construction Documentation ................................................................... 31 5.1 Standard Specification Clauses ....................................................................31 5.2 Standard Drawings .........................................................................................31 5.3 Site Specific Drawings ....................................................................................31 5.4 Project Construction File ................................................................................32 6 Inspection and Testing Requirements during Construction ......................... 33 6.1 Insulating Joint Testing ....................................................................................33 6.1.1 Insulating Joints installed in pipeline with both sides buried ................33 6.1.2 Factory pre-assembled insulating joints ..................................................34
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