Ultrasonic Inspection And Defect Identification of Thin - Walled Stainless Steel Welded Pipe Weld

Stainless steel welded pipe is easy to produce fatal defects such as porosity, edge bite, weld Angle and non-fusion in the production process. Qualitative identification of defects in the welding pipe production process and timely adjustment of equipment and welding process parameters can effectively reduce the occurrence of defects. This research USES the ultrasonic detection, defect of time domain signal by using wavelet packet decomposition, analysis of the differences of defect signal amplitude and use the defect echo energy judging defect type is qualitative, the experimental results show that the ultrasonic test, using the wavelet packet decomposition algorithm, can realize to the stainless steel welded pipe flaw detection and recognition.