Integrity consideration
Hidden floor corrosion and localised product-side or soil-side degradation that may threaten containment.
CATEGORY 04
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Storage Tank Integrity
Tank Shell Thickness Survey
Tank Shell Thickness Survey is delivered to protect containment integrity and establish the condition, geometry or calibrated capacity of storage assets. IAIS UAE develops the scope around the equipment design, materials, service environment, operating history, expected damage mechanisms and the client’s required decision. This prevents technique-led inspection from becoming disconnected from asset risk and ensures that findings are traceable, technically relevant and suitable for maintenance or engineering review.
Service Overview
Tank Shell Thickness Survey
Tank Shell Thickness Survey is delivered to protect containment integrity and establish the condition, geometry or calibrated capacity of storage assets. IAIS UAE develops the scope around the equipment design, materials, service environment, operating history, expected damage mechanisms and the client’s required decision. This prevents technique-led inspection from becoming disconnected from asset risk and ensures that findings are traceable, technically relevant and suitable for maintenance or engineering review.
Category context:
This category provides lifecycle integrity support for aboveground and other industrial storage tanks from fabrication and commissioning through in-service inspection, shutdown examination, repair and return to service. Tank integrity depends on the combined condition of the floor, shell, roof, nozzles, appurtenances, foundations, settlement behaviour, coatings, linings and secondary containment. IAIS UAE develops the scope around stored product, tank design, corrosion history, operating constraints and the governing inspection framework.
Integrity Context
Key considerations for this service category
Integrity consideration
Settlement, distortion, out-of-roundness, roof deterioration and foundation conditions affecting structural behaviour.
Integrity consideration
Balancing in-service screening with the more extensive access available during an out-of-service inspection.
Integrity consideration
Integrating large quantities of MFL, ultrasonic, visual, dimensional and repair information into one defensible tank assessment.
Category Delivery
How IAIS UAE approaches the work
The programme may include API 653 or EEMUA-based planning, visual inspection, floor MFL screening, ultrasonic confirmation and mapping, shell thickness measurement, roof and structural inspection, settlement/verticality/roundness survey, robotic inspection, vacuum-box testing and repair surveillance. Findings are correlated with construction details, previous repairs, corrosion trends and minimum required thickness or remaining-life calculations where authorised.
Typical assets
Fixed-roof and floating-roof tanks, terminal tanks, refinery tanks, water and chemical tanks, tank foundations, bunds, associated appurtenances and pressurised storage interfaces.
Client value
Clients receive a clear view of containment risk, repair urgency, inspection coverage and the basis for continued service or shutdown work. The integrated category reduces fragmentation between floor, shell, roof, geometry and repair records and supports more efficient planning of maintenance windows.
Typical deliverables
Tank inspection report; component condition register; floor and shell maps; MFL/UT data; settlement and dimensional survey; leak-test records; repair and alteration inspection records; corrosion rate; remaining life; next-inspection recommendation and return-to-service dossier..
Expected outcome
Clear, traceable technical information that supports safety, compliance, reliability, maintenance prioritisation and lifecycle value.
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