Ultrasonic pipe testing with ultrasonic pipe inspection equipment refers to a non-destructive testing method that uses ultrasound to inspect internal defects in metal components. Using an acoustic transducer to emit ultrasonic waves through a coupling agent to the surface of the component, the ultrasonic waves will have different reflected signals (echoes) when encountering different interfaces when propagating inside the component. By utilizing the time difference between different reflected signals transmitted to the probe, defects inside the component can be detected. The size, location, and approximate nature of defects can be determined based on the height and position of the echo signal displayed on the fluorescent screen. Ultrasonic pipe testing is more sensitive to cracks, incomplete penetration, and incomplete fusion defects, but less sensitive to pores and slag inclusions. Ultrasonic testing has poor visualization and is not sensitive to near surface defects (known as blind spots in ultrasound).