METHOD FOR DETERMINING BOILER TUBE COLD SIDE CRACKING AND DEVICE FOR ACCOMPLISHING SAID METHOD

摘要

PROBLEM TO BE SOLVED: To provide a scanning device for performing ultrasonic nondestructive testing of a tube.SOLUTION: The scanning device comprises a housing. The housing has a bottom surface that is concavely curved with cavities to accommodate a waveguide assembly and an encoder assembly. The waveguide assembly comprises a waveguide and a probe that are in communication with one another. The waveguide has at least one surface that is contoured to match an outer surface of the tube. The waveguide facilitates transmission of ultrasonic signals generated by the probe into the tube. The encoder assembly comprises a spring loaded wheel that contacts the tube. The encoder assembly provides a signal indicative of a location of the probe relative to a position on the tube as the scanning device is moved in a direction of a longitudinal axis of the tube.