Understanding the technique
Uses diffracted ultrasonic signals from discontinuity tips to support flaw detection and through-wall sizing. It is often combined with complementary ultrasonic examination to address coverage requirements.
Where it adds value
Welds in pressure equipment and pipelines where suitable geometry and access are available.
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
Recorded TOFD data, identified indications and sizing results within the qualified procedure.
Planning considerations
Near-surface coverage and component geometry can require complementary inspection methods.
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.