ADVANCE ULTRASONIC ADVANCE ULTRASONIC AUT INSPECTION · used for interpretation of the weld integrity • Pulse echo UT, with zonal discrimination • TOFD, added for verification
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ADVANCE
ULTRASONIC
INSPECTION
DACON INSPECTION TECHNOLOGIES
ADVANCE
ULTRASONIC
INSPECTION
AUT
Who we are
Conventional and
Advanced NDT and
Inspection Services
Oil and Gas, Refinery,
Petrochemical, Heavy
Industry, Mining
Over 400 personnel
including more than
300 inspectors
Thailand headquarters
with International
expertise since 1979
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Advanced Ultrasonic Inspection AUT
• AUT = Automated Ultrasonic inspection
• Mostly used during construction of long pipe lines
• Uses Zonal discrimination
• Most suitable for narrow gap welds
• Often combined with TOFD
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Zonal discrimination
• The weld will be divided onto several zones
• Each zone will be covered by a separate probe
• The fill passes (of narrow gap weld) need a tandem probe set up)
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Zonal discrimination
• Special calibration blocks with a reflector representing each part
of the weld are required
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Zonal discrimination
• A scanner with a big number of probes is used
• Using the calibration reflectors each probe is separately set up to cover
and focus its specific zone
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
AUT basically uses 3 different techniques to come to the final signal presentation which is
used for interpretation of the weld integrity
• Pulse echo UT, with zonal discrimination
• TOFD, added for verification and sizing advantages
• Mapping, the UT data from all channel is combined to form easy to interpret map
views of the top of the weld
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Screen Lay out
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Lack of Side wall fusion
Advanced Ultrasonic Inspection AUT
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
Advantages
• Gives exact position of the defect
in the weld
• Optimum angle of incidence of
the ultrasound beam at the weld
interface
• Gives a permanent record
• Repeatability, good for monitoring
• No radiation involved
• Gives information about weld defects
occurring in which weld pass.
This info can be used to optimize
the welding process
Advanced Ultrasonic Inspection AUT Advantages & Disadvantages
Disadvantages
• Lot of equipment required
• Long preparation and set up time
• Requires experienced technician
for interpretation
DACON INSPECTION TECHNOLOGIES
DACON INSPECTION SERVICES F O R A L L Y O U R I N S P E C T I O N N E E D S
How Can We Help?
Contact
Email : info@dacon-inspection.com
Phone : +66 (0) 33 012 484-7
www.dacon-inspection.com
DACON INSPECTION TECHNOLOGIES
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