Manual Phased-Array Ultrasonic Testing
Phased-array ultrasonic testing used in manual mode is essentially an upgraded version of conventional ultrasonic testing. Probe crystal is divided in several small elements which can be individually pulsed. Three types of view are generally used depending on the application.
Straight Beam Linear (or Electronic) Scan
To create the linear scan (L-scan or E-scan), a small group of active elements is electronically moved across all elements available in the probe. The reproduce a lateral movement of the probe (B-scan), repeated quickly to show a live scan on screen.
Straight Beam Sectorial Scan
To create a sectorial scan (S-scan), active elements are pulsed with a very tight synchronization of delays to be able to electronically steer the ultrasonic beam. An angular range around 0° with a straight beam probe will generate a pie shape view opening downward.
Angle Beam Sectorial Scan
To create an angled sectorial scan (S-scan), the transducer is mounted on an angled wedge to get desired refracted angle as it would be for conventional UT. Then, active elements are pulsed with a very tight synchronization of delays to be able to electronically steer the ultrasonic beam. An angular range around the naturally refracted angle from the wedge will generate an angled pie shape view.
Our welding inspection procedures applicable to pressure vessels, piping, boilers and storage tanks are approved by the RBQ (Quebec province Authorised Inspectors agency).
Few Applications :
Linear scanning using a straight beam probe
- Localized thickness loss detection and measurement
- Detection of lamination defects
- Detection of hydrogen blistering
- Overlay and cladding bonding inspection
Sectorial scanning using a straight beam probe
- Bolts inspection
- Pins and shafts inspection from the end
Sectorial scanning using an angle beam probe
- Welding inspection, replacing conventional UT
- Crack detection and characterization
- Shafts inspection from circumference surface
- Gear teeth inspection
- Fast scanning
- Easier indications interpretation with 2D views
- Excellent probability of detection
- Screenshots recording
- Very versatile technique
- Requires surface contact with a coupling agent
- More expensive instrumentation
- More complex training for technicians
- ASME, Sect. VIII, Div. 1 and 2
- ASME, Sect. I
- ASME, B31.1 and B31.3
- API 650 an 653
- ASTM, E2900 (PAUT)
- ASTM, E114, E587, E797, E1901, E2192 (UT)
- ASME, Sect. V, Art. 4 (Mandatory Appendices)
- ASME, Code Cases 2541, 2557, 2558
- ISO, 4386-1 (“babbitt”)
- TAPPI, TIP 0402-16
Personnel Certifications :
Services offered from :
- Quebec city, QC
- Chicoutimi, QC
- Montreal, QC (some applications)
Technical sheets have been prepared for main applications. Do not hesitate to contact us for more detailed information.