Passive probe HTHA

phased-arrayfor hydrogen analysis

Cover More of the Weld and HAZ—Angle-Beam DLA Probe (A28) • High-resolution 10 MHz dual 32 small-element arrays • High beam-steering capability • Increased probability of detection (POD) offered by a longer focal range due to its patented pivoting housing • Series of wedges with roof angles offering passive focusing for depths from 4 mm to 95 mm (0.16 in. to 3.74 in.) Fast HTHA Scanning—Zero-Degree DLA Probes (REX1) • 10 MHz dual 64-element arrays • Beam width coverage up to 30 mm (1.18 in.) • Adjustable stabilization and carbide wear protection system fits to the surfaces of pipes as small as 4 inches (101.6 mm) OD • Integrated wedges covering thicknesses from 4 mm to 95 mm (0.16 in. to 3.74 in.) • Provides clear C-scan images when used with an encoder or scanner Earlier HTHA Detection—TFM Probes Optimized for HTHA (A31/A32) • High frequencies with multiple smaller elements unleash the potential of TFM for HTHA detection • Although all Dual Linear Array probes are manufactured with 10 MHz piezo-composite, the tested center frequency specification of the REX1 models shifts down to ~9.0 MHz because of attenuation occurring in the integrated wedge. • These probes come standard with an OmniScan connector and a 2.5 m (8.2 ft) cable or can be specially fitted with other connectors and cable lengths. • Important note: Using phased array probes in direct contact with a surface during inspection can lead to permanent damage. A wedge should always be used. Wedges for the A28 Probe The angle beam wedge series is optimized for weld volume and heat-affected zone inspection. The wedge angle is set to generate L-waves at a 65-degree nominal incident angle in steel.