In order to detect the internal defects in various connecting pipes and socket weld joints of the power generation units

a test block simulating said defects has been prepared through finite-element stress analysis of the socket weld joint.By selecting reasonable ultrasonic system and ultrasonic reflected signal

the detection and analysis on said test block have been carried out.Results of detection show that the said ultrasonic detection method can sensitively and effectively detect the early internal defects in weld structure of this kind

providing technical support for safe operation of said welded structure.