THE Applus+ SOLUTION
IWEX improves the ability to image flaws to determine if they are defects or benign. IWEX is a full matrix capture (FMC) technique, a new class of UT inspection techniques that capture the full waveform or A-scan for all combinations of firing each element in an array and acquiring the A-scans on each and every element of the array.
The term “Mode” indicates how many sound reflection the system uses to create the image of the flaw. Where other FMC techniques generate a single mode at time, up to three modes, IWEX can simultaneously generate up to 13 different modes to detect and image flaws of any orientation, from parallel to perpendicular to the inspection surface by processing the 16,384 A-scans generated by the two 64 elements array probes.
This is an improvement on phased array, which can often only “see” flaw tips and corners, where IWEX can image the flaw surface. The IWEX image can be viewed as a 2D cross-section or displayed as a 3D image allowing the user to get a better look at the flaw. This ability to “see” the flaw better enables the user to distinguish between types of defects and to discriminate certain types of benign flaws from others that can grow and lead to failure.
Better sizing and discrimination also allows users to qualify ILI tools and enables them to determine the error in an ILI tool run. Knowing the error in an ILI measurement can assist in engineering critical assessments to predict the probability of failure for specific types of pipeline defects.