November 2011 page 1 of 2 Ultrasonic wall thickness inspection on storage tanks - Beetle www.ApplusRTD.com Ultrasonic wall thickness inspection for storage tanks - Beetle Corrosion from the inside is a common cause for leaks in storage tanks. Aggressive components in stored product can affect the tank wall. For this reason, it is necessary to measure the wall thickness in a number of places along the tank’s contour regularly. At ground level, the results can be read from a UT device immediately. The results are stored in a computer and added to the inspection report in the form of a diagram. This enables the client to be certain about the condition of his tank very swiftly. Application areas Beetle inspection is an on-stream method for carrying out wall thickness measurements on storage tanks. Wall thickness inspections are carried out regularly, in order to comply with the requirements of authorities, inspection agencies and insurance companies. The frequency can be increased, if a reduction of wall thickness is observed during a measurement. At such times, it can also be decided to extend the inspection, for instance by means of Mechanised Wall thickness Mapping (find more info in the Mechanized Wall thickness Mapping sheet). Controllable As the Beetle is equipped with two powerful, individually operated electric motors, the operator is able to steer the Beetle accurately, using a joystick. The results are transferred through a cable at ground level and shown directly on the display of the UT equipment.