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Anomaly Detection Based Applications

1. Corrosion Under Pipe Support (Robust Detection/Screening)
2. Tank Floor Inspection from outside Chime (Robust Detection/Screening)
3. Sleeve Weld Inspection (Complex Geometries)
4. Vessel Inspection at Elevated Temperatures

Anomaly Detection Approach to Representing UT Data

• Only Highlighting indications which are ”unusual” compared with the rest of the scan (Shannon Information Processing)
• Ideal for highlighting subtle damage signatures, especially when close to specimen boundaries e.g. shallow cracks
• Subject of recent publication by ADG

Shannon Information Processing: Corrosion Under Pipe Support (CUPS)

• Multiple skip phased array inspection can be used to detect corrosion under pipe supports (without lifting pipe)
• Smoothly texture, deep flaws do not reflect ultrasound well, easily missed
• Shannon information (statistical processing) finds weak reflections by comparing to area off of support
• Robust tool for screening/detection of Corrosion Under Pipe Supports

Shannon Information Processing: Tank Floor Inspection

• Multiple skip phased array inspection can be used to detect corrosion in annular ring plate of storage tanks
• Smoothly texture, deep flaws do not reflect ultrasound well, easily missed
• Shannon information (statistical processing) finds weak reflections with greater confidence

Deployment: Tank Floor Inspection (Shannon Information Processing)

• Tank Floor Inspected with Multiple-Skip PAUT technique
• Regions with anomaly highlighted as regions with potential corrosion
• Circumferential location and distance from the shell was reported for each anomaly

Deployment: Sleeve Weld Inspection (Shannon Information Processing)

• Major reflections from weld obscure small LOF flaws
• Potential for mis-identifying geometry as flaws or flaws as geometry
• LOF defects much easier to identify after applying Shannon Information Processing
• Analysis significantly faster, less prone to false calls

Shannon Information Processing: Vessel Inspection at High Temperature

• Developed prototype system for on stream inspection of heavy walled vessel (temperature above 200°C)
• Designed custom wedge to withstand high temperature (up to 350°C)
• Tested on 4” block with small FBH holes drilled to various depths heated to 280°C
• TFM imaging very noisy, shallowest target merged into backwall, PCI image improved but still noisy
• TFM with Shannon Info processing on signals plus thresholding gives best detection of simulated flaws

Highlights of Projects
Phase Coherence Imaging (PCI) Based Applications Anomaly Detection UT Data Analysis Based Applications FMC/TFM Based Inspection Applications Phased Array Based Inspection Applications Wind Turbine Blade and Main Shaft Inspection Applications Software Based Solutions

For more information, email us at rad@acuren.com
or call (519) 372-1831 and ask for one of our innovation experts