This inspection is performed while the tank is still in service.
Inspection Scope mainly involves detailed visual examination on exterior of the tank done by an authorized API-653 inspector and ultrasonic thickness measurement of the shell & roof plate including all nozzles.
B. Out of Service Inspection (OOSI)
This inspection is performed while the tank is not in service.
Our authorized API-653 inspector conducts a visual inspection on exterior & interior of the tank and assures the quality and completeness of the nondestructive examination (NDE) results.
Nondestructive examination mainly involves MFLT on tank bottom & annular plates, ultrasonic thickness measurement of the shell & roof plate including all nozzles.
Inspections shall be documented in a comprehensive report containing:
NDE results (UT, MFTL, etc.)
Complete evaluation of the condition of the tank
Tank repair recommendations, remaining life, tank external shell settlement cosine graph and inspection interval.