November 2018

Features

INSIDE JOB: Phased Array Ultrasound Can Deliver Better Weld Inspections

By Dominic Giguere, Zetec Pipeline weld inspections are one of the most challenging – and common – types of nondestructive testing (NDT) applications in the oil and gas industry. Joining materials with different metallurgical properties, grain alignments, acoustic characteristics, cylindrical geometries, and other attributes can produce minute flaws and defects that are difficult to identify or detect even with sophisticated probes and instruments. “The results of weld inspections can have a big effect on decisions about uptime, code compliance, and safety,” said Chad Ivy, regional advanced operations manager for Versa Integrity Group, which is based in Houston. Ultrasonic testing (UT) he

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