ERW tube inspection system uses advanced phased-array technology

May 2, 2011

Olympus offers an inline ERW tube inspection system. This ultrasonic, industrial NDT system uses advanced phased-array technology to inspect weld seams and the HAZ of ERW tubes.

According to the manufacturer, phased array offers broad sector coverage of the HAZ while maintaining constant amplitude detection within the entire inspection area, even where there is significant weld seam movement relative to the probes. Phased array also permits electronic optimization of the beam shape to enhance the detection of small defects such as penetrators.

The system can inspect pipes with diameters from 2.375 to 9.625 in. and wall thicknesses from 0.079 to 0.630 in. It has a maximum inspection speed of 295 FPM.

A small, automated, gantry-type bridge positions the inspection head inline or offline when performing inspections, automatic calibrations, calibration checks, and maintenance operations.

While the system's main function is to detect longitudinal flaws using a cylindrical phased-array probe located on each side of the weld, a third cylindrical phased-array probe located on top of the weld and firing at 0 degrees may be used for weld profiling to create a true side view of the weld for simple, fast profile analysis. This third probe and a patented algorithm based on time-of-flight analysis enable the system to detect the scarfing area automatically and send feedback to the PLC for automatic adjustment of the position of each inspection head.

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