Austenitic and nickel-based alloy weld metals and other coarse-grained anisotropic materials affect ultrasound propagation causing beam distortion, beam scatter, mode conversions, and significantly increased attenuation resulting in a poor signal-to-noise ratio (SNR) as compared to shear wave inspections in low-alloy carbon steels. Inspection of these materials requires the use of dual phased array probes with RL (refracted longitudinal) wedge designs that acoustically insulate the transmitter and receiver beams for improved defect SNR and elimination of wedge echoes. Our Dual Linear Array™ (DLA) and Dual Matrix Array™ (DMA) probes are used with removeable wedges to combine different inspection techniques, such as direct L-wave, creeping wave, RTT (round trip tandem), and other multi-mode techniques, into a single phased array S-scan image for full volumetric weld inspection.

Dual UT (TRL) A27 Probes

Dual conventional UT probes can be used for surface wave inspection or, in conjunction with DMA probes, for full weld coverage. The detachable wedges enable more versatility for different pipe diameters and stability.

The OmniScan™ X3 enables you to create custom Dual Linear Array (DLA) or Dual Matrix Array (DMA) probes and wedges. In addition to creating phased array (PA) focal laws, you can also use the scan plan to set up total focusing method (TFM) and phase coherence imaging (PCI) groups. The scan plan accommodates a wide range of geometries, including COD configurations.