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LPI Performs Automated UT Scanning Simplified MIC Assessment

Automated UT Scanning Simplified MIC Assessment
 
For a recent project assessing microbiologically-influenced corrosion in fire protection and service water piping, LPI used an AUT AccuScan automated 2-axis NDT scanner (AUT Solutions, Fulshear Texas) to determine degraded wall thickness. Attached to a pipe with magnetic wheels, the 14-lb scanner travels circumferentially around the pipe while the probe travels axially along a 20-inch arm at scanning speeds up to 30 inches per second.
 
Used on an 8-inch schedule 40 segment of fire water pipe, the Accuscan provided ultrasonic readings of point wall thicknesses using a very fine grid (0.05 inch axially x 0.05 inch circumferentially). Paired with AUT software, LPI was able to obtain a fine-scale map identifying thinned areas, local pitting, minimum thicknesses as well as a 3-D model of the pipe wall interior. Local minimum thickness areas were sampled by LPI for metallography.
 
Using the Accuscan, measurements were completed in 10% of the time required for conventional methods. With its lightweight and battery power, LPI is able to deploy it in the field to measure pipes as small as 2 inches in diameter up to flat surfaces.
 
For more information on LPI UT and other NDT services, contact Sontra Yim at 978-378-1182.

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