This paper introduces the ultrasonic inspection for a number of small diameter titanium alloy pipe, it found that a large number of internal injuries, in order to determine its defects, according to the requirements of the ASME V2010 for endoscopic examination. This paper determines the titanium alloy pipe endoscope inspection process, the process of selection, endoscope and sensitivity test block, the detected object surface illumination and so on are conducted according to the requirements of the ASME V 2...