Tank Floor Inspection
Tank Floor Inspection
Tank Floor Inspection is a critical aspect of storage tank integrity management, as the tank bottom is highly susceptible to corrosion and leakage due to prolonged contact with stored products and moisture. At Assessfie, our tank floor inspection services are designed to detect corrosion, metal loss, and discontinuities at an early stage—helping prevent leaks, environmental damage, costly repairs, and structural instability. Our advanced inspection techniques ensure safe, accurate, and compliant assessment of tank floors.
Why Tank Floor Inspection Is Essential
Leakage through the tank floor is one of the most common failure mechanisms in storage tanks. Undetected corrosion can damage the tank foundation, compromise stability, and lead to costly decontamination and downtime. Regular inspection of tank floors—especially during out-of-service periods—is essential to ensure long-term asset integrity and regulatory compliance.
How Tank Floor Inspection Works
- The tank floor is inspected using advanced non-destructive testing techniques.
- Large areas of the tank bottom are scanned efficiently to identify corrosion and thinning.
- Areas of concern are marked and prioritized for detailed evaluation.
- Follow-up inspection methods are applied to quantify defect size, depth, and remaining wall thickness.
- Certified inspectors provide a comprehensive inspection report with actionable recommendations.
Technologies & Techniques We Use
Magnetic Flux Leakage (MFL)
- A robust corrosion detection technique based on Hall Effect sensors.
- The tank bottom plate is magnetized to near saturation.
- Corrosion or metal loss causes magnetic flux to leak into the surrounding air, which is detected by sensors.
- Enables rapid scanning of large tank floor areas with high reliability.
Surface Topology Air-gap Reluctance Sensors (STARS)
- Advanced technology used alongside MFL to determine whether corrosion originates from the top side or bottom side of the tank floor.
- Allows switching between top-side, bottom-side, and full-plate views, clearly identifying corrosion origin.
- Improves inspection accuracy and repair planning.
Follow-Up Ultrasonic Testing (UT)
- Used to quantify indications detected by MFL and STARS.
- Determines exact remaining wall thickness, defect size, and location.
- Provides reliable data for repair or fitness-for-service decisions.
Tank Floor Inspection Applications
Our tank floor inspection services are widely used across industries that rely on bulk storage systems, including:
- Crude Oil & Petroleum Storage Tanks
- Chemical & Petrochemical Storage Tanks
- Refinery & Terminal Tanks
- Water & Wastewater Storage Tanks
- Above-Ground Storage Tanks (ASTs)
- Fixed Roof & Floating Roof Tanks
Benefits of Our Tank Floor Inspection Services
- Early detection of corrosion and metal loss
- Prevention of leaks and environmental incidents
- Reduced downtime and maintenance costs
- Improved asset life and foundation stability
- Reliable data for repair and integrity planning
- Compliance with statutory and industry requirements
Standards & Regulations
Our Tank Floor Inspection services strictly follow international standards and industry codes to ensure accuracy, safety, and global acceptance.
International Standards
- ISO 9712 — Qualification and certification of NDT personnel
- ISO 15548 — NDT equipment performance verification
ASTM Standards
- ASTM E709 — Magnetic particle testing (where applicable)
- ASTM E317 — Ultrasonic equipment evaluation
Industry-Specific Standards
- API 653 — Inspection, repair, alteration, and reconstruction of storage tanks
- API 650 — Welded tanks for oil storage
- API 510 — Pressure vessel inspection (where applicable)
- ASME Section V — NDT requirements
Personnel Qualification Standard
- SNT-TC-1A — Qualification and certification of NDT personnel
