GWUTGuided Wave Ultrasonic Testing (non-destructive testing)
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Accordingly, the reduction of access costs is an important lector in favor of the GWUT technique.
The GWUT system employs low frequency (typically under 200 kHz) guided waves, operating just above audible frequencies, propagated from a ring of transducers fixed around the pipe.
The GWUT system is able to detect and to distinguish between symmetrical and flexural waves and both types are displayed.
On the other trend, the GWUT inspection revealed cases of external (soil) corrosion at the buried underground pipes and also at those bare sections that slipped off their supports and stayed in contact with the soil.
While there is no one technology that can cover all inspection situations, GWUT coupled with CIS and other emerging technologies, will be important tools in maintaining any pipeline integrity program.