Bottom Floor Inspection by Magnetic Flux Leakage is an advanced non-destructive testing technique used to detect corrosion, metal loss, and pitting in storage tank bottom plates. MFL is particularly effective for identifying localized and general corrosion without requiring full floor plate removal.
This technique is commonly applied during out-of-service inspections to rapidly assess large tank floor areas with high accuracy.
Why MFL Inspection Is Required
Tank bottom corrosion often initiates on the soil side and remains hidden until leakage occurs. MFL inspection allows early detection of metal loss and thinning, reducing the risk of tank failure and environmental damage.
MFL provides comprehensive coverage of the tank bottom and supports data-driven repair and maintenance decisions.
Scope of Inspection
MFL inspection is applicable to:
Carbon steel tank bottom platesAnnular ring areasWelded floor jointsLarge diameter above-ground storage tanks
Inspection Methodology
MFL inspection is performed by magnetizing the tank floor plates and scanning the surface using specialized MFL sensors. Areas with metal loss or corrosion cause disturbances in the magnetic field, which are detected and recorded by the system.
The inspection data is analysed to identify corrosion location, extent, and severity. Results are used to assess remaining floor thickness and support decisions related to repair, replacement, or continued service.
Key Benefits
MFL inspection provides rapid coverage of large floor areas, reliable detection of corrosion and metal loss, reduced inspection time, and accurate data for integrity assessment.
Industries and Applications
MFL tank floor inspection is widely used in refineries, oil terminals, petrochemical plants, chemical storage facilities, and bulk fuel depots.
Bottom Floor Inspection by Magnetic Flux Leakage offers an efficient and reliable solution for assessing tank floor condition. By detecting corrosion early, this service supports safe operation and effective tank integrity management.
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