TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection...
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Transcript of TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection...
![Page 1: TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection needs tofd on hdpe defects in hdpe welds •](https://reader031.fdocuments.net/reader031/viewer/2022022700/5b54399c7f8b9ab2698cc11c/html5/thumbnails/1.jpg)
ADVANCE ULTRASONIC INSPECTION
DACON INSPECTION SERVICES
TOFD ON HDPE WELDING OF HDPE
![Page 2: TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection needs tofd on hdpe defects in hdpe welds •](https://reader031.fdocuments.net/reader031/viewer/2022022700/5b54399c7f8b9ab2698cc11c/html5/thumbnails/2.jpg)
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
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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
TOFD on HDPE Defects in HDPE welds
• Cold weld; severe lack of fusion/non fusion
• Poor fusion
• Foreign contamination
![Page 4: TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection needs tofd on hdpe defects in hdpe welds •](https://reader031.fdocuments.net/reader031/viewer/2022022700/5b54399c7f8b9ab2698cc11c/html5/thumbnails/4.jpg)
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
TOFD on HDPE Conventional Testing methods
• Visual exam Poor correlation to weld quality for heavy wall
• Bent-strap test (ASTM D2657) Low probability of detection:
• Traditional UT pulse-echo Ineffective for heavy wall
• Hydro testing Derived from metallic systems Viscoelastic plastics
• deformation depends on time and temperature • does not ensure long-term performance
t
1-1/2 t(25mm min)
15 t(150mm min)
15 t(150mm min)
TEST STRAP
BUTT FUSION
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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
TOFD on HDPE Testing and development
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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
TOFD on HDPE On site work execution
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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
TOFD on HDPE Example signal, Test pipe
No defect
Contamination Voids
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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
TOFD on HDPE Example signal, Actual signal
![Page 9: TOFD ON HDPE ADVANCE WELDING OF ULTRASONIC … · dacon inspection services for all your inspection needs tofd on hdpe defects in hdpe welds •](https://reader031.fdocuments.net/reader031/viewer/2022022700/5b54399c7f8b9ab2698cc11c/html5/thumbnails/9.jpg)
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
TOFD on HDPE Example signal, Actual signal