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AS 4827.1-2008
$125.14
Coating defect surveys for buried pipelines, Part 1: Direct current voltage gradient (DCVG)
This Standard specifies a direct current voltage gradient (DCVG) survey method for identifying defects in coatings on buried pipelines.
Table of contents
Header
About this publication
Preface
Foreword
1 Scope
2 Definitions
3 Principle
4 Limitations
5 Competence of personnel
6 Equipment
6.1 General
6.2 Interrupter
6.3 Voltmeter
6.4 Electrodes
7 Set-up procedure
7.1 General
7.2 Procedure
8 Defect survey procedure
Appendix A
A1 General
A2 DCVG signal amplitude at test points
A3 DCVG signal amplitude at coating defects
A4 IR component from coating defect epicentre to remote earth
A5 Calculation of %IR
Appendix B
B1 Procedure for determining DCVG signal amplitude to remote earth at test points
B2 Procedure
B3 Positioning and marking the defect
Appendix C
C1 General
C2 Interpreting the form of equi-potential contours
Appendix D
D1 Information to be supplied by the purchaser or end user
D2 Typical requirements of a contract
Cited references in this standard
Content history
AS 4827.1-2008 REC:2018
DR 08056
Please select a variation to view its description.
| Published | 02/09/2008 |
|---|---|
| Pages | 17 |
Please select a variation to view its pdf.
