Pulsed Eddy Current

The technique used in detecting flaws and corrosion in ferrous material which hidden under layer of coating , fireproofing ,or insulation.

Failure of steel support structures, piping systems or vessels can be caused by corrosion of the steel under passive fire protection or insulation and visual signs of degradation may not be evident.

Pulsed Eddy Current technology can help detect such hidden corrosion before it becomes a potentially expensive and hazardous problem.

Pulsed Eddy Current inspection approach based on this technology checking for corrosion under passive fire protection or insulation. A detailed visual inspection is carried out to look for signs of degradation and Pulsed Eddy Current technology is used to measure the wall thickness of the metal behind the fire proofing or insulation.

Benefits of PEC Technology

PEC technology can be applied in-service, so there is no need to empty the storage spheres.
No need to remove the passive fire protection. PEC technology can measure through up to 250 mm of material including the reinforcement mesh.
Performed in service during plant operation
Monitor to assess CUI or FAC damage
Accessibility issues minimized by using rope access operators.

Scorpion B-Scan

The technique is considering remote access ultrasonic crawler designed for cost effective A and B-scan for storage tanks, vessels without needing couplantlike water in RMS

PEC TECHNOLOGY APPLICATIONS

For in-service wall thickness monitoring – monitor the corrosion rates of critical equipment to facilitate the safe extension of run times and the reduction of shutdown frequency and duration.
To annular rings: detect corrosion while atmospheric storage tanks are in service by measuring the wall loss of annular rings.
In the splash zone: improve safety cost effectively when measuring caisson and riser wall thickness. Readings can be made through marine growth and up to 20 mm of coatings and corrosion products.

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