It is very important to ensure the structural integrity of industrial components without causing any damage. Phased array ultrasonic testing is one of the most reliable and non-destructive testing methods. Preventive maintenance is an essential strategy for the integrity of equipment in industries such as refining and petrochemical.
Regular maintenance prevents equipment failure and reduces downtime. Phased array ultrasonic testing (PAUT) allows for detailed inspections to predict potential serious issues. In this article, we’ll explore how phased array ultrasonic testing works, its applications, and the benefits.
What is Phased Array Ultrasonic Testing
Phased array ultrasonic testing is a non-destructive testing method to inspect materials for internal flaws like cracks and corrosion. It is an advanced and efficient way to detect defects and provide detailed images of materials.
It can be controlled electronically, allowing inspectors to change the angle of the ultrasonic beam without physically moving. It helps to find cracks, lack of fusion, corrosion, and thickness variations. PUAT is used for inspecting storage tanks, pressure vessels, and boilers.
How PUAT Works
PAUT generates highly detailed images of the internal structure of equipment to determine the cause of damage. Here’s the breakdown of the process:
Array of Elements
A probe with an ultrasonic converter is placed on the surface of the equipment to be tested.
Electronic Phasing
It is done by controlling the time of ultrasonic beams to stay focused or move away as required.
Beam Steering
It allows the inspector to scan the equipment or material from different angles without moving the probe.
Gathering Data
The sound waves reflected from damage or boundaries are collected using a converter.
Image Formation
Multiple beams are put together to create a cross-sectional image using advanced software.
Applications of Phased Array
Phased array ultrasonic testing is a non-destructive method and is used in various industries, including:
Weld Inspection: PUAT allows for to detection cracks and porosity with fast and accurate assessment of weld quality.
Corrosion Check: This testing allows the detection of corrosion and the thickness of metal.
Power Generation: PUAT inspection is done to check early signs of wear and tear in turbines and boilers.
Pipeline check: Industries like oil and gas use the PUAT method to ensure that pipes aren’t damaged.
Benefits of PUAT
The following are the advantages of using phase array ultrasonic testing:
1. High Accuracy
A probe is used to control the beam and allows the surface to be scanned at different angles. It allows the detection of damage to complex geometry equipment and material thickness to check corrosion. It is perfect for repairs of complex geometries.
2. Detailed Coverage
Phased-array ultrasonic testing allows control of the ultrasonic beam and improves defect detection, especially in complex geometries.
3. Efficiency and Versatility
With no mechanical scanning, PAUT reduces the inspection times. The phased arrays are used to change the shape and focal point of the ultrasonic beam to optimize each inspection. With immediate digital imaging, damage and weld quality assessments can be done faster.
4. Immediate Images
Instant cross-sectional images enable immediate decision-making during maintenance and reduce downtime.
5. Non-Destructive Method
It doesn’t use ionizing radiation, making it safer for operators. This method also prevents material destruction during the testing process.
