Automated ultrasonic examination system for heat transfer tubes in aboiler

Abstract From the Canadian patent

A novel automated ultrasonic examination system for heat transfer tubes in a boiler is disclosed herein which makes it possible to perform ultrasonic examination from the inside of the heat transfer tubes without necessitating removal of scale from the outer surfaces of the boiler tubes by polishing nor necessitating measurements in restricted places where manual measurements are difficult or impossible. The disclosed novel system comprises an insert tube adapted to be inserted into a cylindrical header to which one ends of the heat transfer tubes are connected, an insert tube moving device for moving the insert tube in the axial direction of the header and revolving it about its own axis, …