What is Long Range UT Inspection

Long Range Ultrasonic testing is a rapid screening test method for integrity assessment of pipelines, non-piggable buried, encased piping, vertical or inaccessible piping (e.g., overhead pipe racks) or epoxy coated pipelines to locate areas of potential degradation or engineering concerns and gross discontinuities for targeted assessment and inspection. While conventional NDT test methods provide localized inspection, underneath or in the vicinity of the sensors, LRUT is able to test 100% circumferential wall over tens of meters of the pipe length from the single inspection (contact point) location.

 

Why is Long Range UT Inspection used

  • Examine 180meters (90m from each side of the transducers) from the single test location.
  • Examine 100% of the pipe circumferential wall from the single test location (contact point).
  • Maintenance cost reduction by not removing.
    • surface coating of the entire pipeline except 500mm width exposed to attach transducers.
    • insulation of the entire pipeline, except 500mm exposed to attach transducers.
  • No need to sand blast or grind entire pipeline surface under examination.
  • No need to excavate the entire non-piggable pipeline or random spot tests.
  • No need for a couplant which is necessary in conventional ultrasonics.
  • Detects weld root erosion faster than conventional test methods.
  • Detects corrosion (loss of cross section) at pipe support. See image below.
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