Phonon Diagnostics Technique (PDT) is a specialized Non-Destructive Testing (NDT) method used primarily for the real-time inspection of industrial infrastructure. It is often referred to as “Phonon Emission Analysis.”

Key Advantages
PDT has gained significant traction in the oil and gas industry because it solves the “in-service” problem:
-No Shutdowns: It can be performed while the facility is in full operation. You don’t need to stop production or empty a tank to inspect it.
-100% Coverage: A single set of sensors can monitor long stretches of pipeline or entire pressure vessels, providing a “3D map” of the structure’s health.
– Hard-to-Reach Areas: It is specifically used for Corrosion Under Insulation (CUI) and Corrosion Under Pipe Supports (CUPS). Because the sensors “listen” through the material, you don’t have to strip off the insulation or move the pipe.
– Temperature Range: It works in extreme environments.
-Real-time data acquisition

Applications
– Oil & Gas: Pipelines (buried and underwater), offshore platform legs, storage tanks, and risers.
– Power Plants: Boiler waterwall tubes, heat exchangers, and high-pressure steam lines.
– Civil Infrastructure: Bridges, tunnels, and large-scale metal structures.