APPARATUS FOR INSPECTING A HEAT EXCHANGER TUBE

摘要

Apparatus for inspecting relatively long, thin-walled, small-bore tubes (1) of a heat exchanger, provided with support plates (4) for holding the tubes in predetermined positions, comprises a composite scanner (6) having a plurality of flexure springs contacting the interior surface of a tube (1) for detecting and profiling tube abnormalities (42,43) as the scanner (6) traverses the tube (1), and an eddy current sensor for generating a unique signal as the scanner (6) passes a contiguous support plate (4) to assist in the accurate location of tube abnormalities (42,43).