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ADVANCE ULTRASONIC INSPECTION DACON INSPECTION TECHNOLOGIES Eddy Current Array technology

Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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Page 1: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

ADVANCE

ULTRASONIC

INSPECTION

DACON INSPECTION TECHNOLOGIESEddy CurrentArray technology

Page 2: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingConventional vs Array

Conventional Eddy Current surface testing

Advantages compared to alternatives (PT/MT):

• No paint removal

• Fast

• Environmental friendly (no use of chemicals)

• Indication of depth of defects

• Small probe• Confusing signal

DACON INSPECTION TECHNOLOGIES

Page 3: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingConventional vs Array

Array Eddy Current surface testing

Advantages of ETA compared to conventional ET

• Increased coverage

• Easy to understand data presentation

• Permanent record

• Increased POD

• Encoded scans

• Big probe• Easy C-scan

DACON INSPECTION TECHNOLOGIES

Page 4: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingConventional vs Array

ConventionalManual raster single coil

ET arrayWide coverage by sequential excitation

of multiple coils

DACON INSPECTION TECHNOLOGIES

Page 5: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

ETA Surface testingProbe explained

• Elements are the individual EC probes used to make the array probe.

• Any type of EC probe can be used as an element. For example:

• Pencil probe:

• Sliding probe:

…1 2 32

+ =Corrosion array

…1 2 32

+Surface array

=

DACON INSPECTION TECHNOLOGIES

Page 6: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingProbe explained

Absolute bridge probe

Double row array

• Uniform sensitivity over the probe width

• Improved resolution that allows smaller defect detection.

• Needs an encoder to align the data in the C-scan.

• Smaller coverage for the same number of elements. Coverage

Resolution

Single row array

• Non uniform sensitivity

• Low sensitivity to cracks parallel to scan direction and between elements

Coverage

Resolution

DACON INSPECTION TECHNOLOGIES

Page 7: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingProbe explained

Omni directional probe

• Sensitivity for defects in each direction

• Axial and transverse channel required to find all defects

Axial channels Transverse channels

DACON INSPECTION TECHNOLOGIES

Page 8: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingWeld inspection

ConventionalMultiple scans

ET arraySingle encoded scan

DACON INSPECTION TECHNOLOGIES

Page 9: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingCovering a surface

ConventionalOverlapping manual scans

ET arrayMultiple encoded scans creating a C-

scan image

DACON INSPECTION TECHNOLOGIES

Page 10: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingApplications and probes

Different applications need different probes

• Surface probes

• Rigid and flexible

• Far surface corrosion

• Near and sub- surface cracks

• 5 KHz frequency

• Weld scan probes (non ferrous)

• Padded probes

• Short surface breaking cracks

• 250 or 500 KHz available

• Complex geometry probes

• Very flexible (I flex)

• Far surface corrosion

• Near and sub- surface cracks

DACON INSPECTION TECHNOLOGIES

Page 11: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

Surface testingApplications and probes

Different applications need different probes

• Weld scan probes (Ferrous)

• Sharck Pobe

• Carbon steel welds

• Detecting cracks in Cap, Toe and HAZ

• Sizing of cracks up to 10 mm deep

• Tangential Arrays

• Coils positioned on their side

• Axis of coil parallel to surface

• Transmit receive mode

• Eddy current parallel to surface

• Capable of dicing under a crack

DACON INSPECTION TECHNOLOGIES

Page 12: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

ETA tube inspection

Advantages over conventional bobbin coil tube inspections

• More sensitive to circumferential cracking

• Provides information on circumferential extent of defect

• Better accuracy for gradual (absolute) wall loss

• Can distinguish between defect signal and tube sheet signal

• No need for additional testing of tube ends for

circumferential cracking by rotating techniques

• If only testing tube ends 5 sec per tube vs 40 sec per

tube for rotating techniques

DACON INSPECTION TECHNOLOGIES

Page 13: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

ETA tube inspection

Sensitivity to circumferential cracking

Bobbin coil

• Eddy currents travel in

circumferential direction

• Eddy currents not

significantly disturbed by

circ. crack

Array

• Eddy currents travel parallel to the

surface

• Eddy currents are perpendicular to circ.

Crack, significantly disturbed

DACON INSPECTION TECHNOLOGIES

Page 14: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

ETA tube inspection

Def Hi probes

• Bobbin coils

• Arrays

• Single

or

• double

DACON INSPECTION TECHNOLOGIES

Page 15: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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

ETA tube inspectionGradual wall loss

Bobbin coil Array

DACON INSPECTION TECHNOLOGIES

Page 16: Eddy Current ADVANCE DACON INSPECTION …...Conventional vs Array Array Eddy Current surface testing Advantages of ETA compared to conventional ET • Increased coverage • Easy to

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 : [email protected]

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

www.dacon-inspection.com

DACON INSPECTION TECHNOLOGIES