Application of Laser Diameter Measurement and Ultrasonic Thickness Gauging in the Measurement of Zirconium Alloy Pipe

It is necessary to measure the size of the zirconium alloy pipe when the pipe is tested. In this paper, a measuring method for the diameter of laser and ultrasonic thickness is introduced in the ultrasonic automatic flaw detection system for pipes. Through the application and test of a zirconium alloy pipe, the error of the outer diameter measurement is <±0.008 mm, the wall thickness measurement error is <±0.02 mm, and the inner diameter measurement error is <±0.025 mm, which is able to meet the requirement of pipe production.