How it works:
The Echomac® UT End Tester consists of two independent, identical test stations designed to inspect the untested portion of a tube end. Generally, this portion would range between 250 and 500mm from the tube end, depending on the application.
The tube is fed to one of these test stations where a tracking cone is inserted into the tube end, the tube is spun, and the end is inspected. The end plug cone tracks with the rotating tube and keeps the couplant out of the tube interior to prevent interference with the test signals.
The tube is then transferred to the second test station where the other end is scanned. The stations each include Echomac® ultrasonic (UT) instrumentation with transducer elements, housed in a transducer box which contains the water couplant and follows the tube surface, as it is being spun.
MAC has recently developed several tube inspection test systems that utilize different technologies for end testing.
One system, supplied to test large diameter stainless steel welded pipe 3.5 – 6.5 meters long, uses eddy current test coils which scan the tube lengthwise and are able to test to within 40mm of the pipe end.
In another recent system, flux leakage technology is used and the end testers are designed to detect longitudinal defects located up to 300mm from the tube ends.
Contact MAC for more information on these and other ways of handling testing to the ends of a tube.