PA UT (PAUT): Annular Rings

ISONIC EXPERT A-RING software application was created for the detection, imaging, and evaluation of the pitting corrosion damages in the fillet weld area up to 100 mm (4 inch) inside the above ground storage tanks. This in-service inspection is performed from outside of the tank with use of PA probe situated on the external lip of the annular ring plate and doesn’t require emptying of the tank so it may be performed at any moment when necessary

PDF Brochure

The ISONIC EXPERT A-Ring inspection software option is available for the ISONIC 3510, ISONIC 2010, and ISONIC 2009 UPA Scope instruments and featured with:
  • Built-In Annular Ring Fillet Weld Area Geometry Editor and Ray Tracer - Scanning Pattern (Scan Plan) Design
  • Intuitive Image Guided PA Pulser Receiver with Beam Forming View
  • True-To-Geometry Cross-Sectional Coverage and line scanning along the tank shell either encoded or time based
  • "On-the-fly" True-To-Geometry Annular Ring Fillet Weld Area Overlay Volume Corrected Imaging:
    • Cross Sectional Slices
    • Top (C-Scan) View
    • Side View
    • End View
    • 3D View
  • DAC / TCG Data / Image Normalization
  • Independent on TCG Angle Gain Compensation / Gain Per Focal Law Correction
  • Automatic Coupling Monitor
  • 100% Raw Data Capturing
  • FMC/TFM Protocol for the data acquisition and imaging
  • Automatic Defects Alarming Upon C-Scan Acquisition Completed
  • Automatic Creation of Editable Defects List
  • Comprehensive Postrpocessing Toolkit Including:
    • Recovery and Evaluation of the Captured A-Scans from the Recorded Cross Sectional Views and C-Scans
    • Recovery of the Cross Sectional Views from the Recorded C-Scans
    • Converting Recorded C-Scans or their Segments into 3D Images
    • Off-Line Gain Manipulation
    • Off-Line DAC Normalization of the Recorded Images / DAC Evaluation
    • Numerous Filtering / Reject Options ( by Geometry / Position / By Amplitude db-toDAC / etc ) and Regeneration of the Corresponding of Editable Defects List and Storing it into a Separate FIle
    • Defects Sizing including the Quantitative Evaluation of the Thickness Loss
    • Automatic creating of inspection reports - hard copy / PDF File
The True-To-Geometrycoverage and imaging allows easy distinguishing between the defects in the annular ring plates and in the fillet welds, which may the allowable incomplete penetration; the damages situated on the upper and bottom surface of the plate are surely distinguished as well

The movies below illustrate the inspection of the critical zone of the annular ring plate (the fillet weld area continued to up to 100 mm / 4 inch inside the tank) with use of ISONIC 3510 instrument

The movie below illustrates the instrument screen (ISONIC 2010) whilst performing scanning of the sample of the annular ring plate with the fillet weld including:

  • A-Scan Calibration (Calibration of the PA Pulser Receiver)
  • Entering the Fillet Weld / Annular Ring Plate Geometry and Beam Tracing
  • Coupling Monitor Calibration
  • Cross-Sectional View Inspection
  • Scanning Along the Shell with C-Scan Capturing
  • Postrpocessing including 3D-Viewing

  • The video below illustrates the data analysis and interpretation for the record made for a segment of annular ring with real defects

    Note: In order to accelerate the data stream the videos above are linked to the Youtube. In case the YouTube may not be accessed from your location please use the links below


    The archive comprices some Exemplary Instrument Files for this application

    The files should be extracted from the archive and played in the regular PC running under Win'XP, 7, 8, 10 with use of the freely distributable ISONIC PA Office software package