Phased Array Ultrasonic Testing (PAUT)

Phased Array Ultrasonic Testing (PAUT) is an advanced method of ultrasonic testing. When applied to steel the phased array image shows a slice that may reveal defects hidden inside a structure or weld.

The phased array probe consists of many small ultrasonic elements, each of which can be pulsed individually. By varying the timing, for instance by pulsing the elements one by one in sequence along a row, a pattern of interference is set up that results in a beam at a set angle. In other words, the beam can be steered electronically. The beam is swept like a search-light through the tissue or object being examined, and the data from multiple beams are put together to make a visual image showing a slice through the object.

Nortech Advanced NDT Ltd. is currently trained and certified to provide Phased Array Ultrasonic Inspection examination techniques that will improve the probability of defect detection and provide the customer with a detailed and comprehensive report which will assist with on-going inspection requirements and document safe operating condition reporting. Phased Array Ultrasonic Inspection is a viable alternative to traditional radiographic inspection methods, and is gaining industry acceptance and preference.

Advantages of using (PAUT)

There are several advantages to using PAUT over other forms of ultrasonic testing. It has a high degree of repeat-ability and can be used in quick succession.

As PAUT emits beams of multiple different angles sequentially, it is able to generate a detailed and accurate cross-section. It is especially useful in situations where there is little room for mechanical scanning as it is able to sweep the beam without moving the probe. 

Key benefits

• Linear or sectorial scans

• Beam focusing

• Beam steering

• Permanent storage of data

• Display enables flaw visualization

• No safety concerns associated with PAUT compared to radiography