Phased Array Ultrasonic Testing (PAUT)

PAUT uses an array of ultrasonic transducers to create and manipulate ultrasonic beams. This allows for enhanced control over the direction and focus of the beams, providing detailed imaging of internal structures and the ability to inspect complex geometries. Phased Array Ultrasonic Testing (PAUT) is an advanced Ultrasonic method which gives the client a permanent record of the inspection results. It is a very versatile method and can be utilized across a broad range of components. UT is best used to detect internal planar defects and verify material thickness. UT can be used on most materials.


• Large volume of data collected. Portable. Good for monitoring purposes. Good for complex geometries. Permanent record of data/inspection results. Reduced scanning times in comparison to manual ultrasonics.

What defects/indications can it detect?

• Corrosion or thinning (known as ‘thickness gauging’).
• Inclusion/laminations.
• Internal planar defects (such as lack of fusion).
• Cracks and voids.

Commonly used to test

• Storage tanks.
• Pipe work.
• Pressure vessels.
• Forgings/castings. environments.
• Small metal components.


• Will not detect surface breaking defects. Material thickness (a minimum material thickness may be required when inspecting welds). More reliant on a clean/smooth material surface

Alternative inspection methods

• Radiography (RT).
• Ultrasonic Testing (UT).