Eddy current testing (ECT) is a non-destructive method for inspecting tubes to assess their condition and lifespan:

How it works

A probe is inserted into the tube and moved through its length, generating eddy currents. The probe’s electrical impedance is measured to monitor the eddy currents, which can reveal defects in the tube.

What it can detect

ECT can detect corrosion, pitting, cracks, erosion, and other changes to the tube’s interior and exterior surfaces.

When it’s used

ECT is commonly used in the power generation, petrochemical, chemical, fertilizer, and air conditioning industries. It’s also used in the aerospace industry for crack detection.

Benefits

ECT is a high-speed method that can be performed through paint and coatings. It can detect very small defects that might not be visible to the naked eye.

How it’s performed

The raw data from the probe is processed using software and analysed by trained inspectors.