V4.1B2T9

Chris Magruder

OmniScan SX \ MX2 Training ProgramPhased Array Analysis Data File Review

OmniScan SX \ MX2 Training Analysis Data File Review - Overview

Prior to performing phased array or UT analysis it is beneficial to have a complete

understanding of under what conditions the inspection was acquired with regard to

the probes, system software configuration and hardware.

This section is a summary of the data file details that are reviewed prior to analysis if

not acquired by the same inspector.

The file referenced in this section can be found on the default OmniScan SX \ MX2

flashcard: TF_12_ID Crack.

ID connected HAZ crack in 12mm carbon steel V weld

OmniScan SX \ MX2 Training Data File Review - TF_12_ID Crack.Opd

Open the TF_12_ID Crack.Opd data file by a touch and hold or mouse right click on

the file name in the header and select open.

Change >File Type: Data, browse to TF_12_ID Crack.Opd using the scroll knob and

select open.

OmniScan SX \ MX2 Training Analysis Data File Review - Select Layout

The file will open with the display in the normal screen mode as opposed to full

screen.

Select the A-C-S layout from the title bar if it is not already displayed.

The next series of slide is to provide a brief overview of the inspection and to point

out where the information resides in the software prior to analysis.

OmniScan SX \ MX2 Training Data File Review - View Probe Details

Navigate to the >Probe\Wedge menu and view the following sub menus for

parameters used in the inspection:

1. >Probe\Wedge = 5L64-A2 probe and SA2N55S dual 5L64 wedge, auto detect off.

2. >Probe position = Skew 90 at -10mm on the index axis. (Green ruler on S-scan)

3. >Part = 12.7mm V weld.

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SA2N55S wedge We

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-10mm

Skew 90 probe Skew 270 probe

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OmniScan SX \ MX2 Training Analysis Data File Review - One Line Scan

The inspection technique is a one line scan parallel to the weld from a fixed position

represented by the blue ruler on the C-scan and B-scan.

The fixed position of the probe is called the index offset and defines the distance

from the wedge face to the weld centerline represented by a green ruler.

0mm 100mmScan axis

-10mm Probe movement

OmniScan SX \ MX2 Training Analysis Data File Review - Scan Details

Navigate to the >Scan menu and view the following sub menus for parameters used

in the inspection:

1. >Inspection = One line scan on encoder #1 at max scan speed of 50mm\sec.

2. >Encoder = Quad encoder in normal polarity with 16 step\mm resolution, and origin 0mm.

3. >Area = 0-100mm defines the length of the one line scan on the C-scan and B-scan (Blue

ruler). All A-scans acquired at 1mm intervals. Length sizing accuracy = +\- 2mm.

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0mm 100mm

OmniScan SX \ MX2 Training Data File Review - Focal Law Details

Navigate to the >Focal law menu and view the following sub menus for parameters

used in the inspection:

1. >Configuration = S-scan using probe associated to pulser and receiver element #1 of 64.

2. >Aperture = 16 element aperture using elements #48-63 of a 64 total element probe

3. >Beam = 45-70 degree S-scan at .5 degree resolution. (45, 45.5, 46, 46.5II.70)

45 degrees

70 degrees

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OmniScan SX \ MX2 Training Data File Review - UT Settings

Navigate to the >UT menu and view the following sub menus for parameters used in

the inspection:

1. >General = The range on the 55 degree A-scan is 2-15mm. Velocity is shear wave. (3240)

2. >Pulser = 5Mhz probe, 80 volts selected, pulse width 100 ns, PRF 50 Hz.

3. >Receiver = 5Mhz filter, FW rectified, video filter on.

4. >55 degree beam = exit point -18.29mm (Index offset + beam offset inside wedge), wedge

delay 31.34us, gain offset +4.8 dB. (Parameters change with each A-scan)

5. >Advanced = Reference on +10 dB scan sensitivity, 640 pt. A-scan.

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OmniScan SX \ MX2 Training Data File Review - Full Screen Data Cursors

Select full screen from the layout menu in the title bar.

Select the scan position on the title bar and move the data cursor in the C-scan to

0mm with the scroll knob or mouse wheel.

The indication seen at 0mm in the root of the S-scan weld overlay is a geometric

indication typical of the entire weld. Not a defect.

Using the scroll knob slowly move the data cursor through the entire C-scan from 0-

90mm while observing the S-scan and A-scan. Every 1mm represents a new S-scan

where all A-scans were recorded. This reproduces the probe movement.

31-62mmData cursor

ID HAZ crack

An ID connected HAZ crack is detected

between 31-62mm on the scan axis.

Zoom from approx. 20-70mm on the C-

scan.

OmniScan SX \ MX2 Training Data File Review Data Point Review

Using the title bar, move the scan axis data cursor to 41mm and the angle data

cursor to 51.5 degrees.

Visualized in the S-scan and A-scan is the corner of the crack at the pipe ID. The

amplitude is 59.1% (A% reading) and the depth is 12.10mm. (DA reading)

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Move the scan axis data cursor to 50mm and the angle data cursor to 58.5 degrees.

Visualized in the S-scan and A-scan is the deepest tip diffracted signal from the

crack.

Crack corner trap at pipe ID. (51.5 degrees) Diffracted signal from deepest crack tip. (58.5 degrees)

OmniScan SX\MX2 Training Analysis TF_12_ID_Crack.Opd cont.

Complete flaw analysis includes evaluation of amplitude, length, depth, and height

sizing, volumetric location, flaw characterization, and an accept\reject decision.

1. Flaw max amplitude (A%): 59.1% measured at 41mm scan, 51.5 degrees. (Crack base)

2. Flaw volumetric position: -4.15mm measured at 50mm scan, 58.5 degrees. (Crack tip)

3. Embedded \ Surface connected?: Inside surface connected

4. Flaw start on scan axis (Sr): 31mm

5. Flaw end on scan axis (Sm): 62mm

6. Flaw length (Sm-r): 31mm

7. Flaw depth (DA): 7.80mm

8. Flaw upper extremity (Ur): 7.80mm

9. Flaw lower extremity (Um): 12.70mm

10. Flaw height (Um-r): 4.90mm

11. Flaw type: HAZ crack

12. Reject

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V4.1B2T9