Acoustic emission test is in great part used for storage tank bottom
monitoring. This technique allow to verify the status of corrosion and
the grade of reliability of the bottom , without to empthy the tank.
The gratest Petroleum Company use this technique in combination with
thickness measurement of the roof and shell to define the residual life
of the tank in accordance to API 653.
Studio V.M. is the leader in Italy for these speciality and the number
of inspected tank updated at july 2012 is 387 from 2004.
Examination is carried out in combination with a pressure test after the construction or during periodical verification.
The examination allow to verify if the component under stress due by
pressure test, withstand to the limit value of pressure without to
This examination is also the best control to prevent collapse during pressure test.
This examination is commonly carried out during the first pressure test
and during working. The control allow to determine the area where the
energy is released in order to verify these areas with other N.D.E.