Effective NDT for backside of tank bottom palte (ESCC)

[TSI999]

Stainless Steel Tank is suspected to have External SCC at backside of bottom plate.
Is there any effective NDT method without stopping operation?
(UT from annular plate, etc...?)

 

[cloa]

What is normal operation- what is is filled with to what depth and is the the level in flux?

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[TSI999]

Hi Cloa,

Operation temp is 42degC ~ 128degC with non-corrosive fluid inside.
No detail information is there for other queries.
We just want to verify whether no SCC occur at backside of bottom plate by soil.