This audit protocol guides field teams through testing of steel pipeline casings to confirm isolation and identify shorts. Steps include spot potential measurements in line with MG SWP CP1.001, assessing potential differences, disconnecting any anodes, installing a current interrupter at the nearest cathodic protection unit, repeating ON and OFF readings, and reviewing results to verify isolation. If required, calculate and record the location of any casing short for excavation and repair. Conclude by reconnecting anodes, cleaning the site, and ensuring safety.
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