NDT - Phils., Inspection Services Corporation

A.     On-Service Inspection (OSI): This inspection is performed while the tank is still in service.

i. 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 service.

i. 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.

ii. Nondestructive examination mainly involves MFLT on tank bottom & annular plates, ultrasonic thickness measurement of the shell & roof plate including all nozzles.

C.     Reports:

i.      Inspections shall be documented in a comprehensive report containing:

1. All observations
2. NDE results (UT, MFTL, etc.)
3. Complete evaluation of the condition of the tank
4. Tank repair recommendations, remaining life, tank external shell settlement cosine graph and inspection interval.