Abstract: The safety and durability of each construction depends primarily on the accuracy of the weld joint. Therefore, it is very important to join the metals without any defects. This study focuses on finding defects in a weld by determining the depth and size of these defects. Experimental work of welding is made in the form of a simple V-groove which we have inspected and analyzed by phased array ultrasonic testing method. This research allowed us to realize that the technique is much better compared to that based on conventional welding, same as to observe that it maximizes structural safety.