Phased arrays Ultrasonic Testing (PAUT) is a novel technique for generating, receiving and imaging ultrasound. PAUT use multiple ultrasonic elements and electronic time delays to create beams by constructive and destructive interference. As such, it offers significant technical advantages for weld testing and plant monitoring over conventional ultrasonic as phased array beams can be steered, scanned, swept and focused electronically from a fixed probe position. Beam steering permits the selected beam angles to be optimized ultrasonically by orienting or focusing them perpendicular to the predicted discontinuities. Phased array allows real-time control of three important ultrasonic probe parameters: Focal distance & Beam angle (continuously and dynamically adjustable), Focal spot size (dynamically adjustable). High speed inspection using single-axis scans instead of conventional raster scan.