Application of ultrasonic testing techniques on austenitic welds for fabrication and in-service inspection

Abstract This paper describes some practical considerations relating to the ultrasonic testing of weld joints in austenitic components, based on the author's experience with components manufactured for, and in service in, nuclear power stations. Problems caused by the effect of grain structure, spurious indications and attenuation of the ultrasound are discussed. The importance of acquiring adequate data from reference blocks is emphasized, and the uses and limitations of various types of angle probe are illustrated.