API 653 - used to inspect most any vertical aboveground storage tank, the "Bible" for Tank Inspection
Every 5 Years requires a visual inspection (rare occasions can be less time) (In Service Inspection)
Sometimes just a visual if the shell and roof thickness trending have been established
Every 10 - 25 years requires an internal inspection (Out of Service Inspection)
Most time intensive inspection, requires full bottom evaluation and the suitability for service.
Aboveground Storage Tank Inspection
STI SP001 - for AST and UST horizontal and UL shop fabricated tank with bottoms or heads (ends) that have a knuckle or are dished or domed. Gets complex with NFPA regulations tied to this standard. Inspections based generally on what kind of containment system is in place.
API TES - Tank Entry Supervisor
establishing a process and procedure to isolate and maintain the safety in and around a confined space during work activities.
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big things take care of themselves
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