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While UT Phased Array continues to be our focus, in response to our clients needs, our scope of services has expanded to provide some of the more traditional inspection services such as;
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 Phased Array Ultrasonic Testing (PAUT)TAC Solution provides advanced ultrasonic technique for Oil & Gas Fabrication and Process Facilities, Power Generation, Pulp & Paper, Steel Construction, Pipeline construction and etc…, Phased Array Ultrasonic Testing (PAUT) used for flaw detection, sizing, and imaging. PAUT technology is the ability to modify electronically the acoustic probe characteristics. Probe modifications are performed by introducing time shifts in the signals sent to (pulse) and received from (echo) individual elements of an array probe. Any ultrasonic testing technique for flaw detection and sizing can be applied using phased array probes.Phased array ultrasonics (PA) is an advanced method of ultrasonic testing that has applications in medical imaging and industrial nondestructive testing. Common applications are to noninvasively examine the heart or to find flaws in manufactured materials such as welds. Single-element (non-phased array) probes, known technically as monolithic probes, emit a beam in a fixed direction. To test or interrogate a large volume of material, a conventional probe must be physically scanned (moved or turned) to sweep the beam through the area of interest. In contrast, the beam from a phased array probe can be moved electronically, without moving the probe, and can be swept through a wide volume of material at high speed. The beam is controllable because a phased array probe is made up of multiple small elements, each of which can be pulsed individually at a computer-calculated timing. The term phased refers to the timing, and the term array refers to the multiple elements. Phased array ultrasonic testing is based on principles of wave physics, which also have applications in fields such as optics and electromagnetic antennae. |
Principle of operation
The PA probe consists of many small ultrasonic transducers, each of which can be pulsed independently. By varying the timing, for instance by pulsing the elements one by one in sequence along a row, a pattern of constructive interference is set up that result 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.
Phased array used in the industry
Phased array is widely used in several industrial sectors, such as construction, power generation or oil & gas industries. This method is an advanced NDT method that is used to detect component failures i.e. cracks or flaws and thereby determine component quality. Due to the possibility to control parameters such as beam angle and focal distance, this method is very efficient regarding the defect detection and speed of testing. Apart from detecting flaws in components, phased array can also be used for wall thickness measurements in conjunction with corrosion testing. Phased array can be used for the following industrial purposes:
- Inspection of Welds
- Thickness measurements
- Corrosion inspection
- Flaw detection
Features of phased array
- The method most commonly used for medical ultrasonography.
- Multiple probe elements produce a steerable, tightly focused, high-resolution beam.
- Produces an image that shows a slice through the object.
- Compared to conventional, single-element ultrasonic testing systems, PA instruments and probes are more complex and expensive.
- In industry, PA technicians require more experience and training than conventional UT technicians.
- Electronically controlled and selectable beam angles, beam focus and beam size
- 100% encoded raw data storage and analysis
- Fully color automatic real-time True-To-Geometry regular Sector Scan (S-Scan) or True-To-Geometry regular Linear Scan (B-Scan) displays with selectable A-Scan.
- Codes compliant.
Benefits
- Greater scope of work due to specialised equipment.
- Large resource pool
- Increased site production
– Instant results, instant weld repairs, instant quality verification - No lost time of other trades
- Project Costs Savings
– Decrease overall man hours due to efficiency gains
– Reduce project durations
– Significant decrease in inspection and welding costs - Increased site SAFETY
- No lost time of other trades when compared to Radiography.
- Higher Production Rates (up to 50mm/sec).
- Excellent technology for detection of critical defects which results in higher quality welds.
- Due to Depth & Height sizing ASME allows larger indications to be accepted over RT.
- Accurate defect locating and sizing leading to more efficient repair times
- Real-time evaluation leading to immediate feedback to welders.
- Close monitoring of workmanship.
- Easily plan sufficient resources for projects.
- Excellent access to data through digital storage.
- Auditable process.
- Code compliant & accepted.
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