OmniScan SX \ MX2 Training ProgramPhased Array Analysis Overview

V4.1R3

Chris Magruder

OmniScan SX\MX2 Training Analysis Overview

Phased Array or conventional UT analysis for weld inspections can be divided into

the following broad categories:

Amplitude analysis.

Volumetric location.

Length and depth sizing.

Flaw characterization. (Crack, slag, porosity, lack of fusion, etc.)

Each of these categories are explained in detail in the next series of sections.

In most applications it is necessary to have participated in or supervised the

acquisition for effective analysis. This is especially true for weld inspection that is

not repetitive and high volume like pipelines.

1. Flaw max amplitude (A%):

2. Flaw volumetric position:

3. Embedded \ Surface connected?:

4. Flaw start on scan axis (Sr):

5. Flaw end on scan axis (Sm):

6. Flaw length (Sm-r):

7. Flaw depth (DA):

8. Flaw upper extremity (Ur):

9. Flaw lower extremity (Um):

10. Flaw height (Um-r):

11. Flaw type:

OmniScan SX\MX2 Training Analysis Overview cont.

The four analysis categories are farther broken down into specific pieces of

information or measurements that are extracted from the data with software tools.

Amplitude

Volumetric location

Length Sizing

Characterization

Volumetric location

Height Sizing

1. Flaw max amplitude (A%): 81.8% measured at 61mm scan, 54.5 degrees.

2. Flaw volumetric position: -6.61mm

3. Embedded \ Surface connected?: Embedded

4. Flaw start on scan axis (Sr): 54.5mm

5. Flaw end on scan axis (Sm): 64.5mm

6. Flaw length (Sm-r): 10mm

7. Flaw depth (DA): 3.96mm

8. Flaw upper extremity (Ur): 20.90mm

9. Flaw lower extremity (Um): 19.03mm

10. Flaw height (Um-r): 1.87mm

11. Flaw type: Lack of side wall fusion

OmniScan SX\MX2 Training Analysis Overview cont.

All of the parameters below can be displayed in the readings except for #3 and #11.

Those are subjective decisions that require experience and training.

1. Flaw max amplitude (A%):

2. Flaw volumetric position:

3. Embedded \ Surface connected?:

4. Flaw start on scan axis (Sr):

5. Flaw end on scan axis (Sm):

6. Flaw length (Sm-r):

7. Flaw depth (DA):

8. Flaw upper extremity (Ur):

9. Flaw lower extremity (Um):

10. Flaw height (Um-r):

11. Flaw type:

OmniScan SX\MX2 Training Analysis Overview Code Example ASME

Some of the codes, standards, and procedures that are commonly used in phased

array inspection require all of the analysis categories to make an acceptance

decision.

1. Flaw max amplitude (A%):

2. Flaw volumetric position:

3. Embedded \ Surface connected?:

4. Flaw start on scan axis (Sr):

5. Flaw end on scan axis (Sm):

6. Flaw length (Sm-r):

7. Flaw depth (DA):

8. Flaw upper extremity (Ur):

9. Flaw lower extremity (Um):

10. Flaw height (Um-r):

11. Flaw type:

OmniScan SX\MX2 Training Analysis Overview Code Example AWS

Some of the codes, standards, and procedures that are commonly used in phased

array inspection require only require amplitude and length.

OmniScan SX\MX2 Training Analysis Overview Calibrations

The quality of the data and ease and accuracy of the analysis is directly related to

the beam quality and calibration.

Beam quality = beam angle, beam exit point, beam wedge delay are all precise and

the beam echo dynamic is as intended for the application.

OmniScan SX\MX2 Training Analysis Overview UT configuration

The precision of the sizing is also directly related to the setup of the UT parameters

including A-scan point quantity, scale factor, range, filtering, voltage, etc.

OmniScan SX\MX2 Training Analysis Overview Advanced Probes

More important than any software feature or instrumentation specification is having

the right probe with the right strategy.

The immediate future of phased array into more difficult and challenging materials

and applications will be accomplished with advanced probes more than any

software feature or instrument specification.

Pictured below is the Olympus 2.25 MHz dual matrix array in TRL (Transmit-

Receive-Longitudinal) designed for austenitic material inspection.

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Questions or comments:

PhasedArraySupport@Olympusndt.com

V4.1R3