Rudenberg's Formula for the Placement of an Anode Ground Bed

This formula considers the attenuation of the pipe to determines the required structure voltage based on the current output.
Rudenberg’s formula is very theoretical just using pipe parameters. Other factors to be considered include the presence of foreign metallic structures, accessibility and availability of a power source which are not included.

Vx — Potential at X in volt caused by grounds anode current

I — Ground anode current(Amps)

ρ — Actual soil resitivity (0hm / cm)

y — Length of anode in earth(ft)

x — distance from ground anode(ft)

 

If x > 10y then, 

Input Parameters

  1. To create a new case, click the “Add Case” button
  2. Select the Rudenberg’s Formula for the Placement of an Anode Ground Bed application from the Cathodic Protection module list.
  3. Enter Case Name, Location, Date and any necessary notes.
  4. Fill out all required fields.
  5. Make sure the values you are inputting are in the correct units.
  6. Click the CALCULATE button.

 

  • Ground Anode Current 
  • Actual Soil Resistivity
  • Length of Anode in Earth
  • X – Distance from the Ground to Anode

 

Outputs/Reports

  1. View the results.
  2. If an input parameter needs to be edited be sure to hit the CALCULATE button after the change.
  3. To SAVE, fill out all required case details then click the SAVE button.
  4. To rename an existing file, click the SAVE As button. Provide all case info then click SAVE.
  5. To generate a REPORT, click the REPORT button.
  6. The user may export the Case/Report by clicking the Export to Excel/PowerPoint icon.
  7. To delete a case, click the DELETE icon near the top of the widget.

 

  • Potential at X Caused by Ground Anode Current

Related Links

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Table of Pages
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  2. AC Mitigation PowerTool
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  4. Horizontal Directional Drilling PowerTool
  5. Crossings Workflow
  6. Pipeline Toolbox
  7. Encroachment Manager
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  9. PRCI Thermal Analysis for Hot-Tap Welding
  10. PRCI River-X
  11. PRCI RSTRENG
  12. RSTRENG+
  13. Ad-hoc Analysis
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  18. Hydrotest PowerTool
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  21. External Corrosion Direct Assessment Procedure – RSTRENG
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  23. Definitions
  24. Pipe Schedule and Specifications Tables