Integrity of Tank
- Condition of Bottom
- Geometry of Bottom
- Presence of Corrosion (Rust)
- Condition of Welded Seams
- Thickness of Bottom Plates
- Condition of Shell Wall
- Geometry of Forms of Shell Walls
- Presence of Corrosion (Rust)
- Condition of Welded Seams
- Thickness of Bottom Plates
- Presence of Sludge
- Topology and Distribution
- Volume (m3)
- Presence of Formations Under the Sludge
- Gas Pockets
- Water
- Sediment (Solids, Scale)
Current Technologies
- Condition of Bottom
- Internal Laser Measurement (Tank Out of Operation)
- NSE Robotic UT Inspection (Tank In Operation)
- Plate Thickness
- Manual NDT Measurement (Tank Out of Operation)
- NSE Robotics UT Inspection (Tank in Operation)
- Condition of Shell Wall
- External Laser Measurement (Tank In Operation)
- Presence of Corrosion (Rust), Condition of Welded Seams, Thickness of Shell Plates
- Presence of Sludge
- Manual Dipping (Tank In Operation)
- NSE Multilayer Acoustic Profiler (Tank In Operation)
- NSE Infrared Thermography Profiler (Tank in Operation)
- NSE Echo Sound Profiler
- Presence of Formations Under the Sludge
- Visual (Tank Out of Operation)
- NSE Acoustic Sub-Sludge Profiler (In Development)
- Blending and Mixing
Conclusion
- Tanks integrity is Estimated using Different Technologies
- The Inspection Result can be Contradictory due to the Limitations of Different Methods used
- Majority of Inspection Technologies are Costly
- Require Tanks to be Out of Service
- Current Integrity Inspections are Manual
- Reliant on Manual Skills and Manual Measurement
- Periodic Inspections
- Intervals are Based on Risk Assessment
- Continuous Monitoring
- Not Available
“SCOT” Integrity Concept
- Development of New Technologies for Continuous Monitoring of Tank Integrity
- Automated Data Acquisition and Presentation
- No Interruption to Tank Operation
- No Man Entry
- Technologies are Based on Applied Acoustics
- The Tank Integrity Information can be received using the Principles and Methods of Acoustic Monitoring
- SCOT – Smart Crude Oil Tanks
- Acoustic Waves have unique Physical Properties
- Allow Propagation in Liquids, Solids and Gas without Significant Losses
- Acoustic Waves are Sensitive
- Temperature, Density, Viscosity, %of Gas/Liquid
- Acoustic Waves Widely Used
- NDT, Oceanography, Underwater Imaging , Medicine
- Acoustic Fields are Safe for Personnel
- Acoustic Technologies are Mature and Accepted
Structure of SCOT
Cost Impact of Sludge
- Estimated Potential Savings
- Value of Unusable Inventory
- Cost of Sludge Removal and Disposal
- Tank Repair and Maintenance Attributable to Sludge
- Effective
- Long Term