ACOUSTIC
EMISSION & NDT SCIENTIFIC PUBLICATIONS
Leak
Prevention of Above-ground Storage Tanks by means of Acoustic
Emission Testing
3rd International Conference on NDT, 15-17 October
2003, Chania – Crete, Greece
Anastassopoulos, A., A., Kouroussis, D., A.
Tank floors are the
most vulnerable parts of atmospheric storage tanks. Predictive
maintenance requires corrosion assessment at regular intervals, so
that repairs can take place, in order to prevent leaks resulting in
severe implications to the environment and lost product. Periodic
tank floor inspections, which require emptying of the tank
regardless of its condition, lead to significant losses of time
because of the opening and emptying of tanks in good condition. The
Acoustic Emission (AE) NDT technique offers solutions to the
aforementioned problems. With the use of AE, the tank floor
condition can be assessed without the need to empty the tank. The
tank is monitored for 1-3 hours by an array of AE sensors placed on
the outside part of the tank wall which detect signals arising from
corrosion and/or leak. The results of this monitoring provide a
recommendation as for the period of tank’s safe operation until
re-test.