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High Frequency Acoustic Emission Testing

Testing Above Ground Storage Tanks

When conducting a Tank Bottom AE test using the ultra-low frequency AE sensors there are a lot of restrictions and limitations. For example, the tank has to be quiet without any liquids flowing for minimum of 12 hours prior to the test. Also the presence of any extraneous noise nearby prevents the technician from collecting meaningful data. There are several in plant tanks that AE testing was not possible.

The use of HFAE to collect tank bottom data has solved this problem, however this is restricted to tanks less than 60 feet (18m) in diameter. Any tanks above this size low frequency is a requirement. A large number of tanks that are less than 60 feet have been tested and the results verified and AE has been proven to be a very good screening allowing the owner to prioritize the internal inspection. Use of this method to grade the tanks to meet with RBI programs is also possible.

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