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  • AS 2832.2-1991

    Superseded A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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    Cathodic protection of metals - Compact buried structures

    Available format(s):  Hardcopy, PDF 1 User, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Superseded date:  30-06-2017

    Language(s): 

    Published date:  01-01-1991

    Publisher:  Standards Australia

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    Table of Contents - (Show below) - (Hide below)

    1 - AS 2832.2-1991 CATHODIC PROTECTION OF METALS - COMPACT BURIED STRUCTURES
    4 - PREFACE
    5 - CONTENTS
    7 - FOREWORD
    8 - SECTION 1 SCOPE AND GENERAL
    8 - 1.1 SCOPE
    8 - 1.2 REFERENCED DOCUMENTS
    9 - 1.3 DEFINITIONS
    10 - SECTION 2 DESIGN OF STRUCTURES FOR CATHODIC PROTECTION
    10 - 2.1 GENERAL
    10 - 2.2 STRUCTURE COATING
    10 - 2.3 STRAY CURRENTS
    10 - 2.4 TEST POINTS
    10 - 2.4.1 General
    11 - 2.4.2 Location
    11 - 2.4.3 In-situ reference electrodes
    11 - 2.5 INSULATING JOINTS
    12 - 2.6 ROAD AND RAIL CROSSINGS
    12 - 2.7 ELECTRICAL ISOLATION
    12 - 2.8 EARTH POTENTIAL RISE CAUSED BY HIGH VOLTAGE POWER SYSTEM FAULTS
    13 - 2.9 ELECTRICAL CONTINUITY
    13 - 2.10 GRAPHICAL SYMBOLS
    14 - SECTION 3 COATINGS FOR USE WITH CATHODIC PROTECTION
    14 - 3.1 GENERAL
    14 - 3.2 COATING PROPERTIES
    14 - 3.3 COATING CHOICE
    16 - SECTION 4 CRITERIA FOR CATHODIC PROTECTION
    16 - 4.1 GENERAL
    16 - 4.2 FERROUS STRUCTURES
    16 - 4.2.1 Buried structures
    16 - 4.2.2 Alternative protection criteria
    16 - 4.3 COPPER/COPPER ALLOY STRUCTURES
    16 - 4.4 LEAD STRUCTURES
    16 - 4.5 MIXED METALLIC STRUCTURES
    16 - 4.6 STRUCTURES SUBJECT TO STRAY DIRECT CURRENT
    16 - 4.7 MEASUREMENT OF POTENTIAL
    16 - 4.7.1 Polarized potential measurement
    17 - 4.8 OVERPROTECTION
    18 - SECTION 5 DESIGN OF CATHODIC PROTECTION SYSTEMS
    18 - 5.1 GENERAL
    18 - 5.2 SAFETY PRECAUTIONS
    18 - 5.3 CHOICE OF SYSTEM-IMPRESSED CURRENT OR GALVANIC ANODES
    19 - 5.4 CONTROL OF INTERFERENCE CURRENTS
    19 - 5.5 CABLES
    19 - 5.5.1 Cable joints and protection
    19 - 5.5.2 Types of cables
    19 - 5.5.3 Test cables
    20 - 5.5.4 Impressed current anode cables
    20 - 5.5.5 Galvanic anode cables
    20 - 5.6 CHECK LIST FOR INITIAL SURVEYS
    20 - 5.7 DETERMINATION OF CATHODIC PROTECTION CURRENT REQUIREMENTS
    20 - 5.7.1 General
    20 - 5.7.2 Prediction of current requirement from design parameters
    21 - 5.7.3 Determination of current requirement by field testing of existing structures
    21 - 5.8 ANODE ARRANGEMENTS
    21 - 5.8.1 General
    21 - 5.8.2 Calculation of appropriate anode/structure separation
    22 - 5.8.3 Anode positioning and burial
    23 - 5.9 ANODE MATERIALS, APPLICATIONS AND OPERATING CHARACTERISTICS
    23 - 5.10 CALCULATION OF GALVANIC ANODE MASS
    24 - 5.11 CALCULATION OF GALVANIC ANODE OUTPUT CURRENT
    24 - 5.12 POWER SUPPLY FOR IMPRESSED CURRENT SYSTEMS
    24 - 5.12.1 Sources of direct current
    25 - 5.12.2 Equipment
    25 - 5.12.3 Calculation of voltage requirements
    25 - 5.13 BACKFILL
    25 - 5.14 PROVISION FOR STRAY CURRENTS
    25 - 5.15 SYSTEM DESIGN DOCUMENTATION
    27 - SECTION 6 INSTALLATION OF CATHODIC PROTECTION SYSTEMS
    27 - 6.1 GENERAL
    27 - 6.2 MATERIALS AND EQUIPMENT ACCEPTANCE TESTS
    27 - 6.2.1 General
    27 - 6.2.2 Anodes
    27 - 6.2.3 Cables
    27 - 6.2.4 Transformer-rectifier equipment
    28 - 6.2.5 Prefabricated insulating joints
    28 - 6.3 INSTALLATION OF GALVANIC ANODE SYSTEMS
    28 - 6.4 INSTALLATION OF IMPRESSED CURRENT ANODE SYSTEMS
    28 - 6.4.1 Cabling
    28 - 6.4.2 Groundbed
    28 - 6.5 INSTALLATION OF REFERENCE ELECTRODES
    29 - 6.6 INSTALLATION OF INSULATING FLANGES, JOINTS AND COUPLINGS
    29 - 6.6.1 Test for insulation integrity
    30 - SECTION 7 CONTROL OF INTERFERENCE CURRENTS FROM CATHODIC PROTECTION SYSTEMS TO MINIMIZE THEIR EFFECT ON FOREIGN STRUCTURES
    30 - 7.1 GENERAL
    30 - 7.2 REGULATORY REQUIREMENTS
    30 - 7.3 MINIMIZATION OF INTERFERENCE CURRENT
    30 - 7.3.1 Design of the system
    31 - 7.3.2 Actions for minimizing interference currents
    31 - 7.3.3 Detection of interference levels
    31 - 7.3.4 Control of interference
    33 - SECTION 8 CATHODIC PROTECTION OF STRUCTURES SUBJECT TO STRAY DIRECT CURRENT
    33 - 8.1 GENERAL
    33 - 8.2 MINIMIZATION OF STRAY CURRENT EFFECTS
    33 - 8.2.1 General
    33 - 8.2.2 Minimization of track leakage current
    33 - 8.2.3 Mitigation of stray current pick-up and discharge
    34 - SECTION 9 OPERATION AND MAINTENANCE OF CATHODIC PROTECTION SYSTEMS
    34 - 9.1 GENERAL
    34 - 9.2 MEASURING TECHNIQUES
    35 - 9.3 COMMISSIONING SURVEY
    35 - 9.4 CATHODIC PROTECTION POTENTIAL SURVEYS
    35 - 9.5 EQUIPMENT MAINTENANCE CHECKS
    35 - 9.5.1 For impressed current systems
    35 - 9.5.2 For galvanic anode installations
    35 - 9.6 STRUCTURE INSPECTIONS
    35 - 9.7 RECORDS
    37 - APPENDIX A - GUIDANCE ON THE GENERAL USE OF CATHODIC PROTECTION
    37 - A1 SCOPE
    37 - A2 GENERAL COMPONENTS OF CATHODIC PROTECTION INSTALLATIONS
    37 - A3 FACTORS AFFECTING THE CORROSION OF BURIED OR PARTIALLY BURIED METALLIC STRUCTURES
    40 - APPENDIX B - LIST OF DEFINITIONS
    42 - APPENDIX C - CONTROL OF INTERFERENCE CURRENTS-LIST OF ELECTROLYSIS COMMITTEES

    Abstract - (Show below) - (Hide below)

    Provides guidelines for the cathodic protection of external surfaces of compact buried structures and gives information on the design, installation, operation and maintenance of cathodic protection systems.

    Scope - (Show below) - (Hide below)

    This Standard provides guidelines for the cathodic protection of external surfaces of compact buried structures, including tank farms, service station tanks, tower footings, steel pilings (in soil), short well casings, compressor and pump stations and associated pipework. The Standard specifically covers the following subjects which relate to cathodic protection:(a) The design of structures requiring cathodic protection.(b) Coatings for use on buried metal structures.(c) Criteria for choice of cathodic protection potential.(d) The design of cathodic protection systems.(e) The installation of cathodic protection systems.(f) The control of interference currents on foreign structures.(g) The cathodic protection of structures subject to stray direct current.(h) The operation and maintenance of cathodic protection systems.NOTES:1 A different approach is required to achieve satisfactory protection of mounded installations to that for installations buried below ground.2 Guidance on the general use and design of cathodic protection systems, and factors affecting the corrosion of buried metallic structures, are given in Appendix A.3 This Standard employs positive current flow, and uses the potential sign conventions specified in AS 1852.

    General Product Information - (Show below) - (Hide below)

    Committee MT-014
    Document Type Standard
    Publisher Standards Australia
    Status Superseded
    Superseded By
    Supersedes
    Under Revision

    History - (Show below) - (Hide below)

    Under Revision see DR 02281 First published as AS 2832.2-1991.

    Standards Referencing This Book - (Show below) - (Hide below)

    AS/NZS 1596:2002 The storage and handling of LP Gas
    AS 2832.5-2002 Cathodic protection of metals - Steel in concrete structures
    AS 2159-1995 Piling - Design and installation
    AS 1768-1991 Lightning protection
    AS/NZS 3788:1996 Pressure equipment - In-service inspection
    AS/NZS 2312:2002 Guide to the protection of structural steel against atmospheric corrosion by the use of protective coatings
    AS/NZS 1596:1997 Storage and handling of LP Gas
    AS 3961-1991 Liquefied natural gas - Storage and handling
    AS/NZS 3788:2001 Pressure equipment - In-service inspection
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