Analysis and Suggestion on Application of Demestic Automatic NDT Equipment for Seamless Steel Tube

The present development of automatic NDT equipments for seamless steel tube in China is briefed, advantages/disadvantages of different types of automatic NDT equipments are introduced and suggestions are made.According to the analysis, when ultrasonic phased array is applied to automatic NDT, the following problems shall be tackled, including repetitive emission of ultrosonic energy, interference of ultrasonics from different directions, as well as the setup of the position and amplitude of the alarm thresholds.As for automatic eddy-current testing equipment, the muti-frequency testing and the signal processing software shall be optimized.If an automatic magnetic flux leakage equipment is to be used on seamless steel tube with wall thickness bigger than 20 mm, the capability of the magnetization (coil)device and the structure and parameters of the testing coil shall be optimized.When a digitized automatic radiographic testing equipment is to be applied, it is necessary to set up the multi-ray machine nose.