High-Temp TOFD: Time-of-Flight Diffraction


 
The High-Temperature TOFD transducer acts like a conventional TOFD transducer but designed for temperatures up to 200°C (392°F). Time-of-flight diffraction is a method used to determine the size of mid-wall and I.D. cracks in metallic welds. It requires highly-damped, broadband transducers and wedges that generate refracted longitudinal (L) waves. The high-temp TOFD transducers come standard with a straight-mounted Microdot connector. The TOFD wedge is also designed for use up to 200°C (392°F) and includes two coupling irrigation ports and gimbal-mounting holes.

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Features

Temperature & Testing Data

This data is calculated with the transducer, wedge, and asset all at 150°C (peek data) or 200°C (celazole data). During actual inspections, there will be a temperature gradient from the asset up to the transducer.
 
 

High-Temp Wedges – Celazole U-60

Up to 200°C (392°F)
 

 

Peek
Temp (°C) 1st BW Gain (dB) Low / Low Velocity (in./uS) % Dif V from 25 °C Gain at 80% FSH % Dif BW from 25(°C) Fc (MHz) % Dif Fc from 25 (°C)
25 10 0.117 0 16 0 4.88 0
50 10 0.116 0.77 16 0 4.8 1.64
75 10 0.116 1.20< 16.5 3.13< 4.76 2.46>
100 12.5 0.115 1.97< 17.5 9.38 4.66 >4.51
120 15 0.114 2.65 19.5 21.88 4.27 12.50
150 20 0.113 3.68 23.5 46.88 3.86 20.90
175 26 0.113 3.42 29.5 84.38 3.91 19.88
200 39 0.112 4.53 39 143.75 6.05 -23.98

Specifications

Part Numbers
Case Style Frequency Element Diameter Part Number
inch mm
3/8 – 32 2.25 0.25 6.4 mm 00-015636
3/8 – 32 5 0.25 6.4 mm 00-015635

View the Technology & Features tab for technical and temperature information.
 
 

Case Dimensions
Case Length Width Height
3/8 – 32 0.41 in. 10.4 mm 0.37 in. 9.5 mm 0.72 in. 18.3 mm

 

Wedges

High-Temp TOFD Wedges & Dimensions

View the Technology & Features tab for temperature testing information for these wedges
 

Case Style Temp Range Angle* Part Number Length Width Height
3/8 – 32 Up to 200°C 45°L 01-013467 0.67 in 17 mm 1.25 in. 31.75 mm 0.53 in. 13.5 mm
3/8 – 32 Up to 200°C 60°L 01-013468 0.67 in 17 mm 1.25 in. 31.75 mm 0.53 in. 13.5 mm
3/8 – 32 Up to 200°C 70°L 01-013469 0.67 in 17 mm 1.25 in. 31.75 mm 0.53 in. 13.5 mm

* Refracted in Carbon Steel. Standard and custom refracted angles available.
 

Downloads

High Temperature Line Data Brochure

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