ADVANCE ULTRASONIC ADVANCE ULTRASONIC AUT INSPECTION · used for interpretation of the weld integrity • Pulse echo UT, with zonal discrimination • TOFD, added for verification

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



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)





• Special calibration blocks with a reflector representing each part

of the weld are required





• 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




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




Screen Lay out




Lack of Side wall fusion




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



How Can We Help?

Contact

Email : [email protected]

Phone : +66 (0) 33 012 484-7

www.dacon-inspection.com


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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