Ultrasonic testing of welded joints in pipelines. New techniques and instruments

Abstract

The paper describes a technique for ultrasonic testing of welded joints in pipelines of small diameters (10 to 530 mm) with thin walls (2 to 10 mm). A highly efficient technique of ultrasonic testing using “chord” transducers with elastic protective covers in combination with general-or special-purpose flaw indicators is suggested. The technique has been practically tested for several years. Possibility of recording results of ultrasonic tests with the help of specialized portable instruments is discussed. Results of practical utilization of the developed techniques and instruments in detecting real defects are given.