SGS introduces Guided Wave inspection technology
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SGS SA - Industrial Services product story
Edited by the Engineeringtalk editorial team
Mar 17, 2009
SGS's Guided Wave inspection technology, also known as long-range ultrasonic testing, is claimed to offer advantages in spot measurement.
The technology screens 100 per cent of the volume of the piping inspected for metal loss features such as corrosion and erosion.
The piping can be in operation, insulated or even buried.
Guided Wave technology uses low-frequency guided ultrasound waves travelling along the pipe, providing 100 per cent coverage of the pipe length.
In normal applications, tens of metres of piping may be inspected from a single location.
Affected areas are precisely located in terms of distance from the transducer ring and highlighted for further local examination by visual or other conventional NDT methods.
This non-destructive screening technique can be used without extensive scaffolding and minimises the requirement of removing insulation along the piping.
Guided Wave tools are available in fixed- and modular-ring format.
The fixed-ring designs are suitable for pipe diameters up to 8in (20cm).
For larger diameters, a modular ring up to 42in has been adopted.
Guided Wave technology can be used for diameters ranging from 2in to 42in and temperatures from -40 to +120C.
It is suitable for: road crossings and buried pipelines; the testing of elevated or complex piping from convenient locations; the detection of corrosion/erosion under insulation; offshore process piping/riser inspection; refinery piping; for use in a chemical plant; and for use in a power generation plant.
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