FieldengCathodic Protection
Pipeline Current Attenuation
Current ratio and loss between an upstream and downstream measurement.
Cathodic Protection
Current ratio and loss between an upstream and downstream measurement.
App id: PIPE-05. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
ratio = Iout / Iin, loss = Iin − IoutInputs
| Name | Unit |
|---|---|
| Input current (camera) | A |
| Output current (camera) | A |
Outputs
| Name | Unit |
|---|---|
| Current loss (hero result) | A |
| Current ratio | 1 |
| Loss fraction | % |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
Screening bands in the app: < 5% · 5–25% · > 25%.
| When | Observation | Severity |
|---|---|---|
Loss fraction < 5% | Little current change | info |
Loss fraction ≤ 25% | Moderate current change | caution |
Loss fraction > 25% | Large current change | warning |
Assumptions
- Currents are the same algebraic sign the user intends. Distance is a survey note, not an input.
Provenance
- Simple Iin/Iout comparison. Does not infer coating condition by itself.