Guided Wave – Pipeline

Traditional methods for inspection for corrosion in pipelines can be difficult and expensive, with limited data generated by traditional NDT techniques. Guided Wave testing (GWT) can provide a better solution for rapid screening of corrosion damage. GWT is one of latest methods in the field of NDT for evaluation of corrosion damage and other defects in pipelines.

The method employs mechanical stress waves that propagate along an elongated structure while guided by its boundaries. This allows the waves to travel a long distance with little loss in energy and the technique can be used on buried or insulated pipe.

The Wavemaker Pipe Screening System uses low to medium frequency guided ultrasonic waves that propagate along the structure and is designed for rapid screening of long lengths of pipe/rod to detect external or internal corrosion as well as axial and circumferential cracking. This is composed of three primary components, the transducer ring, the Wavemaker G4 instrument, and the controlling computer.

Data is collected via transducer rings, which use mechanical or pneumatic pressure to dry couple piezoelectric transducer elements to the pipe being inspected. Long lengths of pipe are examined from one location, which allows difficult to inspect areas to be screened with ease with minimal surface preparation.

  • Buried pipe
  • Insulated pipe up to 340°C
  • Buried anchor rod
  • Boiler tubes
  • Road and rail crossings
  • Inspection of 100% of pipe volume
  • Rapid identification of corrosion damage in buried or covered structures
  • Ability to detect corrosion and other defects
  • Monitoring for corrosion over time
  • Collect corrosion data at difficult to access areas
  • Portable equipment
  • Sample Diameter Sizes – 1″ to 40+” diameter
  • Removal of about 1 meter of insulation
  • Surface preparation to scrape off loose paint or scale
  • ASTM E 2775