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NDT.net Issue - 2017-05 - NEWS
2017-05 NDT.net Journal,

PAUT detection and evaluation of the Flow Accelerated Corrosion (FAC) in the tubes near the access holes sealed with radiographic plugs

Sonotron NDT64, Rehovot [Israel]
NDT.net Journal
Issue: 2017-05
At construction time the special threaded access holes are prepared in the tube walls near the hard-to-access welds providing the possibility of entering a source inside the tube for performing the radiography. Further the access holes are sealed with the use of so called radiographic plugs, which are welded on the OD surface.

In service the ID surface of the tube around the access holes is affected by flow accelerated corrosion (FAC) aggressively. The FAC damages should be detected and evaluated on regularly.


Sonotron NDT and Israel Electric (IEC) developed the inspection solution allowing the very rapid and reliable detection and evaluation of the said damages. The solution is based on the use of Phased Array modality and the unique True-to-Geometry material coverage and imaging technology implemented by Sonotron NDTs portable PA instruments of ISONIC series (ISONIC 3510, ISONIC 2010, ISONIC 2009 UPA Scope). The standard inspection software applications ISONIC EXPERT CORNER and ISONIC EXPERT CORNER developed for the shear wave flaw detection in the corner welds and the wedged linear array probes are used. Upon the geometry of the material (wall, thickness, curvature, etc) entered the ray tracing is performed automatically allowing obtaining of the easy interpretable image in real time whilst probe is placed into the desired position. The field video of the inspection is shown below:

Sonotron NDT

More of Sonotron NDT published in NDT.net
2019-02-01: PAUT: In-Service Corrosion Survey of Critical Zone in the Annular Rings in the Above Ground Storage Tanks
2018-11-01: Toggling between S-Scan and FMC/TFM coverage whilst inspecting simple and complex geometry welds and other structural elements
2018-11-01: PAUT and Conventional Modality for the Materials Characterization using Frequency Domain Signal Presentation (FFT)
2018-10-01: Short Range Guided Wave Inspection – Annular Rings with Narrow Outer Chime
2018-09-01: MULTIGROUP T – the new inspection modality combining live S-Scan and FMC/TFM coverage out of the same PA Probe
2018-08-01: Complete PAUT Solution for the In-Service Inspection of Annular Ring Plates in the Above Ground Storage Tanks
2018-07-01: Sonotron NDT Brings the Annual Verification (Calibration) of PAUT Instruments to the Overnight Automatic Procedure at the Premises of the Instrument Owners
2018-06-01: PAUT: Rapid Detection and Evaluation of the Fatigue Cracks in the Web-to-Outboard End Pad Fillet Radius at Lower Wing Attach of an Aircraft
2018-05-01: Sonotron NDT introduces the upgraded version of ISONIC PA AUT platform
2018-05-01: Automatic finding, sizing, and alarming of the defects upon PAUT scanning completed
All 64 Articles & News of Sonotron NDT in NDT.net

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