BS ISO 22426:2020
$142.49
Assessment of the effectiveness of cathodic protection based on coupon measurements
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 30 |
This document specifies requirements for the design, installation, positioning, sizing, use and maintenance of coupons for the assessment of the effectiveness of cathodic protection (CP) of buried and immersed metallic structures, such as pipelines, in the case of normal operation as well as AC and DC interference conditions.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions |
| 9 | 4 Assessment of CP effectiveness |
| 10 | 5 Application principles 5.1 IR-free potential measurements 5.2 DC and AC currents and current densities |
| 11 | 5.3 Spread resistance 5.4 Corrosion rate measurements 6 Design considerations 6.1 General 6.2 Geometry of the defect |
| 12 | 6.3 Dimension of the coupon base plate |
| 13 | 6.4 Surface area of the coupon 6.5 Other types of coupon geometries 7 Monitoring purpose — Selection of installation sites 7.1 General 7.2 Detailed and comprehensive assessment of CP effectiveness |
| 14 | 7.3 Assessment of CP effectiveness under DC interference conditions |
| 15 | 7.4 Assessment of CP effectiveness under AC interference conditions 8 Installation procedures |
| 16 | 9 Commissioning of coupons 9.1 Preliminary checking 9.2 Start up |
| 17 | 9.3 Measurement of the settled parameters 9.4 Installation and commissioning documents 9.5 Frequency of coupon measurement |
| 18 | Annex A (informative) Special types and procedures of coupons and probes |
| 21 | Annex B (informative) Assessment of the effectiveness of CP under any conditions including DC and/or AC interferences |
| 23 | Annex C (informative) Examples of instant-off and current density measurements on coupons — Remote monitoring and remote control |
| 28 | Bibliography |
