ADVANCEULTRASONICINSPECTION
DACON INSPECTION SERVICES
ADVANCEULTRASONIC 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
Operational Excellence - Our Customers
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 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 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 partof the weld are required
Advanced Ultrasonic Inspection AUT
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 coverand focus its specific zone
Advanced Ultrasonic Inspection AUT
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 mapviews of the top of the weld
Advanced Ultrasonic Inspection AUT
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 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 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 defectin the weld
• Optimum angle of incidence ofthe ultrasound beam at the weldinterface
• Gives a permanent record
• Repeatability, good for monitoring
• No radiation involved
• Gives information about weld defectsoccurring in which weld pass.This info can be used to optimizethe welding process
Advanced Ultrasonic Inspection AUT Advantages & Disadvantages
Disadvantages
• Lot of equipment required
• Long preparation and set up time
• Requires experienced technicianfor interpretation
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
Tim ShawChief Marketing Officer
Email : [email protected]
Mobile Phone : +66 (0) 89 245 9966
www.dacon-inspection.com