Recordable Ultrasonic Testing In Lieu Of Radiography NANDHA KUMAR K S

This article describes the application, various code compliance and advantages of the recordable ultrasonic testing in lieu of radiography. The implementation of recordable ultrasonic testing, not only facilitates the increase in productivity and also enhance probability of detection of disoriented defects which may not be detected in radiography because of its inherent disadvantages. To overcome the limitation the inspection procedures were used principally in a test of good workmanship by requiring components, and welded components in particular, to have less than a specified number of defects of a given estimated size per unit volume (or weld length). While this is a reasonable way of ensuring the quality of the manufacture, it can lead to unnecessary repair or replacement of components under stress in service. The move, by various industry sectors, such as aerospace, thermal power plants, refineries and the nuclear industry in particular, towards an approach to non-destructive evaluation based on fitness for-purpose considerations, prompted considerable development of improved NDT techniques, particularly in the field of ultrasonics. Key words: Recordable Ultrasonic Testing In Lieu Of Radiography, code compliance, RT vs recordable UT, , Phased Array UT, TOFD