Guided Wave Ultrasonics (MsS)

Versa Integrity Group can provide Guided-Wave Ultrasonics to help in detection and monitoring of corrosion and other inspection needs.

With the applications of our Guided-Wave ultrasonic systems, Versa Integrity Group can help minimize insulation removal, inspection timeframe, and help keep our clients on budget. When used in combination with our Rope Access division, we can dramatically reduce the cost of infrastructure to access your hard to reach areas. Please view the picture slides to the right for brief examples of the applications of Versa Guided-Wave systems.

What is Guided-Wave Ultrasonics or Long-Range UT (MsS or LRUT)?

To be brief, Versa's guided-wave ultrasonic system (MsS) is a device that electromagnetically generates and receives low-frequency ultrasonic guided waves. It is used for rapidly surveying a long length of pipe or plate from a single test location. The corrosion wall loss and cracks in aboveground, buried, and insulated pipe or plate can be detected, and their locations and sizes can be estimated by analyzing the data with user-friendly software. The MsS system is also useful for inspecting and monitoring areas that are difficult to access, such as those at high elevations, behind walls, or under insulation, from a remote accessible location. This saves time and money that would otherwise be used for scaffolding, insulation removal, or excavation.

Advantages of MsS Guided-Wave Ultrasonics

  • The total cross-sectional wall of the pipe is inspected
  • MsS system can inspect and monitor all pipe diameters from 0.5 to 60 inches
  • Ability to detect corrosion wall loss and cracks in aboveground, buried, and insulated pipe
  • Sensitivity can be as good as 2% loss of cross-section in ideal conditions (but is set at 5% or 10% for buried pipeline or at long distance)
  • Signal-to-noise ratio of better than 50 dB is obtained with epoxy-bonded MsS probe on site. The generated signal with MsS probe is 50 dB (300 times) higher than the coherent noise of unwanted modes
  • MsS probes can be epoxy-bonded to pipeline for periodic inspection and monitoring
  • Inexpensive MsS probes can be permanently installed to pipeline at difficult-to-access location for long-term pipe monitoring
  • A pipe of up to 300°C surface temperature can be tested without taking it out of service
  • Pulse-echo operation provides information on anomaly location and severity
  • Pitch-catch operation provides information on general corrosion of high-attenuation pipelines
  • Sophisticated analysis software reduces false calls and helps in the creation of inspection reports
  • Phase of signal is used to differentiate defects from geometric feature if the signal-to-noise ratio of the signal is high
  • Only a small clearance between pipes is required - about 12 mm (0.5") for monitoring and 25 mm (1.0") for dry coupling
  • Narrow insulation removal along the circumference of pipe - about 60 mm (2.4") for monitoring and inspection
  • Able to test for corrosion under insulation (CUI) for long pipe runs without stripping the main insulation

MsS Guided-Wave Ultrasonics Services

  • Pipe and Pipeline Inspection and Monitoring
  • Vessel or Plate Monitoring
  • Heat Exchanger Tube Inspection
  • Corrosion under Re-pads, supports, and saddles
  • Buried Piping Systems
  • Insulated Piping Systems
  • Insulated Vessels
  • Air-to-Soil Interface
  • Anchor Pads (Antenna Structures)
  • Concrete Insulated Legs
  • Tank Walls

Please contact our office for more details on the services we perform.

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