Guided Wave Technology (GWT)

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Deployed by 6 companies

Detect, locate and classify corrosion defects

Page last modified

April 11 2024

Guided waves are mechanical stress waves that propagate contained within the structural boundaries of pipes or plates with wavelengths that are comparable to the thickness dimensions of the pipe or plate.

Guided waves are used in rapid testing or screening tools to detect, locate and classify corrosion defects. Large sections of piping can be quickly screened with 100 percent volumetric coverage to determine precise locations of corrosion damage.

More detailed inspections can then be concentrated on the locations that are critical, thus saving money and time. These local inspections can be done using guided wave scanning equipment or with another complementary non-destructive testing method. This approach of screening and scanning provides a cost‑effective means of ensuring that representative measurements are made over considerable lengths of piping.

Pros & Limitations

Large sections of piping can be quickly screened

100 percent volumetric coverage

Determine precise locations of corrosion damage

Easy to set up

Portable

Robust in the field

It is a screening tool and will need to be quantified by another NDT Method

Specification

Specification Title	Specification Description
Areas of Application	Oil and gas, petrochemical and power generation.
Data Analysis	The results are presented in a user-friendly GUI, which allows the inspector to report the data.
Efficiency	The data is usually analysed on-site so that any follow-up or complementary inspections can be performed immediately.
Software	Signals are processed by the WavePro™ Software using an advanced processing algorithm.
Training	GUL has a comprehensive training programme of different operator levels targeting specific GW applications.
Inspection	The torsional guided wave mode is highly sensitive to most defect types while experiencing low attenuation in most situations.