White Paper: Corrosion/Erosion Pipe Inspection

This paper presents

• results of corrosion imaging and measurements of steel piping during field tests at the Shell Oil Refinery in Martinez, California.
  (Shell, Exxon, and Mobil Oil sponsored these tests of the Digiray® portable system.)

• an overview of the techniques and technology used

See Also Pipes & Weldments Images

RESULTS

The system is able to discern corrosion whether or not fluid is present in the pipe.

Water-Filled Pipe 2.5 inch diameter 3/16 inch thick steel

Same Pipe No Water Inside

The system can reveal corrosion and measure material loss in pipe under insulation. Leaving the insulation intact saves the customer time and money.

Corrosion Under Insulation (CUI) "3-D" Density Plot of 6 inch steel pipe covered with 2 inches of insulation Material Loss Appears as Lower Height

The system can quantify

• material thickness/loss for any given point
• average thickness/loss over any given area

More Results

Isolated Corrosion Pitting

Island Corrosion caused by Napthenic Acid

Corrosive Pitting

Techniques and Technology

Contact Shot Configuration

Normal Contact Shot Compared to Elliptical Shot

The elbow (bend) in a pipe has areas in which erosion often occurs.

TECHNOLOGY OVERVIEW

See Also Motionless CT™

For more information: contact Digiray (925) 838-1510; info@digiray.com
http://www.digiray.com
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