HTHA Inspection Solutions
OmniScan™ X4 Phased Array Flaw Detector with TFM and PCI
Detect and Define Smaller HTHA Cracks
Detecting HTHA early and reliably is so challenging that multiple inspection methods are often used in conjunction to maximize the probability of detection. Time-of-flight diffraction (TOFD), along with focused phased array (PA) and the total focusing method (TFM), especially using Dual Linear Array™ (DLA) probes, have shown to be particularly effective inspection techniques for this application.
OmniScan™ X4 flaw detector fully supports these methods, as well as innovative phase coherence imaging (PCI), which enhances small flaws and crack tips. OmniScan X4 instruments also offer a variety of onboard software tools to ease your setup and analysis workflow.
- Integrated DLA probe configuration and scanner configuration
- High-resolution TFM images (up to 1024 × 1024 points)
- Software tools to optimize the TFM inspection process, from setup to analysis (scan plan with AIM model, automatic TCG, sparse firing, soft gain and palette slider, live TFM envelope and image filters, gates, and alarms)
- 64-element TFM aperture and 128-element extended TFM aperture (OmniScan X4 64:128PR model)
- Phase coherence imaging to enhance small defects and crack tips (all OmniScan X4 units)
- Acquire up to 8 TOFD and phased array groups simultaneously for efficient screening
- Acquire and display up to 4 TFM and PCI groups at once
- Plane wave imaging (PWI) available with TFM and PCI (using the OmniScan X4 unit with linear array probes)
High-Sensitivity Probes for HTHA
Earlier and More Reliable Detection of High-Temperature Hydrogen Attack
Maximize Your Angle-Beam Coverage of the Weld and Heat-Affected Zone
A38 and A28 Dual Linear Array™ Angle-Beam Probes
- High-sensitivity 10 MHz dual arrays in pitch-catch configuration
- Small element pitch enables clear TFM imaging and wide-angle coverage of the weld and heat-affected zone (HAZ)
- Patented pivoting housing allows closer positioning of the arrays, extending the probe’s through-thickness coverage
- Dedicated wedge series covering pipe diameters from 4 to 48 in. OD and thicknesses up to 95 mm (3.74 in.)
- 64-element arrays of the A38 DLA enable sharper and deeper focusing, unlocking the full potential of the OmniScan™ X4 flaw detector
- 32-element arrays of the A28 DLA offer a smaller wedge footprint for easy access and coupling near the weld
Fast Scanning of Parent Materials for Reliable Detection of HTHA
Zero-Degree REX1 Dual Linear Array Probe
- 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
Leverage Multiple Inspection Methods for Reliable HTHA Detection
A31 and A32 Pulse-Echo Probes Optimized for HTHA
- Offering high definition, these 10 MHz 64-element linear probes are optimized for efficient TFM and PWI inspections
- Smaller element pitch of the A31 probe enables wide-angle coverage of the weld and HAZ
- Wider total aperture of the A32 probe enables finer resolution and deeper focusing
Specifications
| Part Number/Description | Item Number | Frequency (MHz) | Element Configuration | No. of Elements | Pitch (mm) | Active Aperture (mm) | Elevation (mm) | Roof Angle (deg) | Thickness Range (mm) |
| 10DL32-9.6X5-A28 (FD25 wedge) |
Q3301742 | 10 | Dual 32 | 64 | 0.3 | 9.6 | 5 | Set by wedge | 4–45 |
| 10DL32-9.6X5-A28 (FD60 wedge) |
Q3301742 | 10 | Dual 32 | 64 | 0.3 | 9.6 | 5 | Set by wedge | 45–95 |
| 10DL64-19.2X5-A38 (FD25 wedge) |
Q3302412 | 10 | Dual 64 | 128 | 0.3 | 19.2 | 5 | Set by wedge | 4–45 |
| 10DL64-19.2X5-A38 (FD60 wedge) |
Q3302412 | 10 | Dual 64 | 128 | 0.3 | 19.2 | 5 | Set by wedge | 45–95 |
| 10DL64-32X5-1DEG-REX1-PR | Q3301737 | 10 | Dual 64 | 128 | 0.5 | 32 | 5 | 1 | 30–95 |
| 10DL64-32X5-5DEG-REX1-PR | Q3301733 | 10 | Dual 64 | 128 | 0.5 | 32 | 5 | 5 | 4–30 |
| 10L64-19.84X10-A31 | Q3301607 | 10 | Linear | 64 | 0.31 | 19.84 | 10 | N/A | 3–90 |
| 10L64-32X10-A32 | Q3300429 | 10 | Linear | 64 | 0.5 | 32 | 10 | N/A | 8–110 |
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Wedges for A38 and A28 Probes
The A38 and A28 DLA probes’ dedicated angle-beam wedge series are optimized for weld volume and heat-affected zone inspection. The angle of these wedges is set to generate L-waves at a 65-degree nominal incident angle in steel. They feature a roof angle calculated for each AOD diameter from 4 in. to 48 in. (101.6 mm to 1220 mm).
SA38 and SA28 wedges are available in two focus depths (FD) to cover a wide range of thicknesses, from 4 mm to 95 mm (0.16 in. to 3.74 in.). These wedges enable you to fully exploit the A38 probe’s extended focusing capabilities.
Resources
Application Notes
Insights
Videos
Comparison between TFM and PCI on HTHA with the OmniScan™ X3 64 Flaw Detector
Using the OmniScan® X3 Flaw Detector for HTHA and Other Micro-Fissuring Applications
FMC-TFM Basic Principles
Omniscan X3 Phased Array Instrument with TFM/FMC