NAIS offers a wide range of advanced NDT technologies such as Tube testing, PAUT, LRUT and TOFD. With in-house level 3 experts and applications engineers and time served technicians, we are able to advise clients in technical outcomes such as probability of detection, accuracy, productivity as well as commercial factors to ensure best value result.

PAUT

Phased Array Ultrasonic Testing (PAUT), also known as phased array UT, is an advanced non-destructive inspection technique that uses a set of ultrasonic testing (UT) probes made up of numerous small elements. Each of these is pulsed individually with computer-calculated timing to create the phased aspect of the process, while the array refers to the multiple elements that make up a PAUT system.

ToFD

The major advantages of Time of Flight Diffraction (ToFD) inspections are sizing accuracy in terms of height measurement and ease of determining real defects from geometric indications. This is due to a highly damped probe, as used in ToFD inspections, that provides a wide range of frequencies for better sensitivity and resolution.

LRUT

Long Range Ultrasonic testing (LRUT) also known as Guided Wave Ultrasonic testing (GWUT) is an Ultrasonic method wherein ultrasonic waves are transmitted along the pipe wall (guiding walls) up to 180meters in length.

TUBE INSPECTION

TUBE INSPECTION (ECT/RFET/IRIS) used for petrochemical or power generation applications may have many thousands of tubes, each up to 20 m long. NAIS provides a comprehensive inspection program consisting of multiple tube inspection techniques, to determine the integrity of heat exchanger tube bundles. Our extensive experience in heat exchanger inspection provides the assurance that components are properly evaluated to detect damage or defects.