For several decades TOFD method has been widely used for fast and reliable UT of welded joints. TOFD offers great accuracy for measuring the critical size of crack-like-defects. The accuracy of better than ±1mm can be obtained in a wide range of material thickness.
TOFD method has been widely used for fast and reliable ultrasonic testing (UT) of welded joints over the last years. TOFD offers great accuracy for measuring the critical size of crack-like-defects. The accuracy of better than ±1mm can be achieved in a wide range of material thicknesses.
“TOFD 2.2 PRO System” performs mechanized UT of butt welds using Time-Of-Flight Diffraction (TOFD) technique. The Equipment is used for ultrasonic testing of welded joints in:
Wall thickness: from .25 to 12 in (6 to 300 mm). Profile types: CRC Evans, single J groove weld, single V groove weld, double V groove weld, X welds, etc.
Main advantages of TOFD are:
TOFD 2.2 PRO Scanner is compact and reliable equipment, which assures stable scanning results. Such NDT instrument is most often used as ultrasonic pipe testing equipment.Magnetic wheels and spring loaded probes carriers with self-positioning system ensure transducers stability on the object surface which results in good coupling necessary for testing results reliability. Scanner is easy to drive and doesn’t fall from the object even when upside-down. Scanner carries TOFD Ethernet module, Wi-Fi module, and rechargeable battery pack. Cases of TOFD module and battery pack are shockproof. All equipment has protection rating IP65. Scanner design ensures that at fall down, the main impact will come to the scanner structure elements saving electronics. Storage battery ensures 8 hours of TOFD 2.2. PRO system operation. But it can be replaced with a single hand in several seconds if necessary.
|Testing objects parameters|
|Thicknesses||.25 – 2 in (6 – 50 mm)|
|Diameter for cylindrical objects||from 12 in (300 mm) to flat|
|Diameter for spherical objects||from 33 ft (10 m) to flat|
|Scanner (with all electronics onboard)|
|Dimensions (L×W×H)||380×310×240 mm|
|Number of TOFD pairs||1|
|Coupling liquid supply||individually for each probe|
|Compatible probes and wedges|
|Angles (L-wave)||45°, 60°, 70°|
|Number of cursors||2|
|Types of cursors||Conventional (cross) Hyperbolic|
|Indications parameters||X, X1, X2, dX Z, Z1, Z2, dZ Type (Point, Top, Bottom, Middle,Volumetric) Amplitude|
|Units||mm / in / us|
|Pulser and Receiver||2 × BNC|
|Voltage (SWP)||20 V, 30 V, 40 V, 50 V, 80 V, 100 V|
|Energy (SWP)||20 ns to 500 ns with 10 ns step Manual & Auto modes|
|PRF||from 15 to 2000 Hz|
|Range||Up to 100 us|
|Delay||Up to 100 us|
|Gain||0 to 110 dB, with 0.1 dB step|
|Max signal input||20 V p-p|
|Bandwidth||0.2 MHz – 27 MHz|
|Filters||1 MHz, 2-3 MHz, 4-5 MHz, 10 MHz, 15 MHz, Full band|
|Signal Average||2x / 4x / 8x / 16x / 32x|
Basic delivery set:
Available at option: