Understanding the technique
Measures voltage gradients in the ground associated with current flowing toward coating defects. It supports locating and prioritizing coating anomalies along buried pipelines.
Where it adds value
Coated buried pipelines operating with an appropriate cathodic-protection arrangement.
The purpose is to provide evidence that supports a defined asset decision: prioritizing maintenance, investigating degradation, assessing serviceability or documenting equipment condition. The examination is planned around the asset's operating context and the information needed by the owner.
Inspection outputs
Located coating indications, survey classifications and recommendations for targeted investigation.
Planning considerations
Soil conditions, surface access and electrical interference affect survey execution and interpretation.
From scope to decision
Provide equipment identification, drawings, material details, operating conditions and previous inspection records where available.
Confirm the inspection objective, accessible locations, coverage, acceptance basis, site arrangements and reporting requirements.
Review recorded findings against the agreed scope, identify any coverage limitations and define the need for further inspection or engineering assessment.
Project questions
What information helps define a quotation?
Share the asset type, location, quantity, inspection objective and desired schedule. Drawings, previous reports and access information help the team prepare a realistic scope.
Can this technique be combined with other services?
Yes. Complementary examination or engineering assessment may be needed to characterize relevant findings. The combination depends on damage mechanisms, material, geometry and the decision required.