CAN-AUT-02P001 REVISION 00
AUTOMATED ULTRASONIC THICKNESS MAPPING USING THE
WESDYNE AMDATA SYSTEM
Contributors & Authors:
Various, Dave Bajula, Brad Nightscales, Peter Meissner.
Revision Date:
Notes:
December 14, 2016
Adapted from the Acuren USA document AUT-02.
Approval & Authority
Position
Name
Signature
Date
Director of Quality George Bryant
December 14, 2016
Level III
December 14, 2016
Brad Nightscales
QUALITY "EVERY CLIENT, EVERYWHERE, EVERY DAY"
Quality Department
Corporate Office
#260, 2301 Premier Way
Sherwood Park, AB T8H 2K8
Canada
Phone:
(780) 416-8701
Fax:
(780) 416-8723
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
Revision Summary
Revision No.
Date
Description
00
December 14, 2016
First Edition. Adapted from Acuren USA Document AUT-02.
Printed or electronically transmitted documents are considered uncontrolled
Page i
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
TABLE OF CONTENTS
1.0
SCOPE ......................................................................................................................... 1
2.0
REFERENCES ................................................................................................................ 1
3.0
PERSONNEL ................................................................................................................. 1
4.0
SAFETY ........................................................................................................................ 2
5.0
SURFACE CONDITION .................................................................................................. 2
6.0
EQUIPMENT AND MATERIALS...................................................................................... 2
7.0
CALIBRATION .............................................................................................................. 5
8.0
EXAMINATION ............................................................................................................ 7
9.0
EVALUATION ............................................................................................................... 9
10.0 REPORTING ................................................................................................................. 9
11.0 ACCEPTANCE CRITERIA .............................................................................................. 12
APPENDIX A: AUT SYSTEM OPERATION
APPENDIX B: FILE NAMING
APPENDIX C: RECOMMENDED EXAMINATION AREAS
APPENDIX D: TYPICAL AUT SCAN SHEET
APPENDIX E: TYPICAL ACAD EXAMPLES
APPENDIX F: SAMPLE DATA OUTPUT (FILE CONVERSION SOFTWARE FEATURE)
APPENDIX G: VELOCITY CORRECTION TABLES
Printed or electronically transmitted documents are considered uncontrolled
Page ii
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
1.0
SCOPE
1.1
This procedure provides instruction for carrying out UT inspection employing the
Wesdyne AMDATA system.
1.1.1
2.0
3.0
December 14, 2016
When applicable, this procedure shall be utilized in conjunction with relevant
project or client specific procedures or specifications.
1.2
This procedure applies to Automated Ultrasonic examinations (AUT) from the external
surfaces of storage tank, vessel and piping base materials.
1.3
The examinations are to be performed for the detection of I.D./O.D. corrosion and/or
mapping of thickness. Additionally, this procedure may be applicable for the detection
and mapping of laminar-type indications.
1.4
This procedure covers the method, equipment and techniques utilizing 0° longitudinal
waves between 2 – 15 MHz at temperatures from -18°C to 343°C (0 to 650°F) and is
qualified for use based on successful calibration.
1.5
Inspection may be performed over paint and coatings provided the coating is excluded
from the thickness measurement using echo-to-echo measurement techniques, or
(pending customer approval) the applicable measurement error due to the presence of
the coating is detailed in the examination result.
REFERENCES
2.1
CAN-CAL-02P004 Ultrasonic pulse-echo instrument calibration
2.2
CAN-CP-02P001 Acuren Canada SNT-TC-1A Written Practice
2.3
CAN/CGSB-48.9712 Qualification and certification of Non-destructive Testing Personnel
2.4
Wesdyne AMDATA product manual/specification
PERSONNEL
3.1
Inspection shall be carried out by technicians certified to the requirements of the Acuren
SNT-TC-1A written practice CAN-CP-02P001 or the standard CAN/CGSB-48.9712. Note:
Certain codes or standards may require the use of additional or alternate certification
schemes.
3.1.1
UT Level II and Level III examiners are responsible for performing the
inspections in accordance with this procedure and for the supervision of
trainees or Level I personnel, when used. If at any time should it become
evident that the requirements herein cannot be met, the technician is to stop
and immediately contact their supervisor or Level III, as applicable, for
resolution.
3.1.2
A UT Level III technician shall approve new or revised techniques and this
procedure.
Printed or electronically transmitted documents are considered uncontrolled
Page 1 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
4.0
3.2
Technicians shall have been trained in the specific manufacturer or model of equipment
being used.
3.3
Personnel qualification and procedure performance demonstrations shall be required
when specified by the applicable technique, code or standard.
SAFETY
4.1
5.0
December 14, 2016
Personnel shall;
4.1.1
comply with the requirements of the Acuren Safety Management System.
4.1.2
follow all Client and project specific safety requirements.
SURFACE CONDITION
5.1
The examination surfaces shall be clean and free from any condition that might impede
performance of a meaningful examination. The surface shall be free from scale, loose
paint, and weld spatter or corrosion product.
5.2
Surface preparation may be required and performed by wire brushing, scraping, power
buffing, grinding or by grit blasting, as needed. Light scrapping and wire brushing can be
performed by the AUT technicians or Acuren personnel and any major mechanical
cleaning, when required, is the responsibility of the fabricator or owner/user.
5.3
Examinations in accordance with this procedure shall be limited to a maximum surface
temperature of 343°C (650°F). For temperatures in excess of 149°C (300F), special
transducers (par. 6.3) and couplants (par. 6.4) are required and the procedure must be
qualified to demonstrate effectiveness at the actual temperature of the component being
examined.
CAUTION: High Temperature Scanners and Transducers are expensive and
extreme care must be considered when operating at temperatures above 149°C
(300°F).
5.4
6.0
For High Temperature examinations, it is extremely important to have a good t e s t surface condition by removing any remnant insulation debris, scale, etc. This is best
accomplished by power buffing. The higher the temperature the more important surface
condition becomes.
EQUIPMENT AND MATERIALS
6.1
The following equipment constitutes a typical AUT Imaging System for use with this
procedure.
6.1.1
Amdata (I/UX) multi-channel or single channel system
6.1.2
2-Axis Automated Scanner or Manual Scanner
6.1.3
Scanner Power Supply or Scan Controllers
Printed or electronically transmitted documents are considered uncontrolled
Page 2 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
6.1.4
25’ – 300’ Umbilical Cable and associated UT cabling
6.1.5
Color Printer
6.1.6
Laptop for reporting and peripheral programs
6.1.7
Communications; wire or wireless
6.1.8
Calibration Blocks
December 14, 2016
Typical AUT Systems
Automated Scanner
Manual Scanner
6.2
A flaw detection ultrasonic instrument, either analog or digital with A-scan waveform
display, capable of generating frequencies within the range of 1 MHz to 20 MHz, shall be
used as necessary to satisfy examination coverage requirements and provide validations,
as needed. The ultrasonic instrument should also be capable of providing B-scans.
6.3
Transducers
6.3.1
Transducers for AUT can be single or dual element types with nominal
frequencies ranging from 2 – 15 MHz.
6.3.2
Transducers with multiple elements sealed in a protective case with fixed delays
and couplant ports should be used. Transducers for AUT are typically dual 5
MHz, 0° longitudinal wave.
6.3.3
The focal point of dual focused transducers should be within the required
material volume for wall thickness and flaw or lamination detection.
Printed or electronically transmitted documents are considered uncontrolled
Page 3 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
6.3.4
6.4
Transducers shall be suitable for the examination temperature (refer to the
product data sheets). Special high temperature transducers are required for
temperatures above 149°C (300°F) and duty cycles may be required.
Couplant
6.4.1
All couplant materials shall be client approved prior to use.
6.4.2
The couplant shall be water of sufficient pressure directed into the couplant
ports of the transducers. An environmentally safe anti-freeze additive may be
added for temperatures below 0°C (32°F).
6.4.3
If it is impractical to use water as a couplant due to temperature or test surface
conditions, other acceptable couplants (e.g. gels, pastes, vegetable or mineral
oils and other commercially prepared couplant formulations) may be pumped
through the transducer or applied to the test surface prior to scanning.
6.4.4
Couplants should be free of air bubbles and exhibit appropriate wetting
characteristics
6.4.5
For high temperature applications, the following couplants may be considered:
a)
137°C - 204°C (280 – 400°F)

b)
c)
peanut oil, Sonotech Sono 600 Fluid or Base Fluid (or similar)
205°C - 260°C (401 – 500°F)

Sonotech Sono 600 Fluid or Base Fluid (or similar)
261°C - 343°C (501 – 650°F)

6.5
December 14, 2016
Sonotech Pyrogel Grade 7 or Fluid (or similar)
Calibration Block
6.5.1
One or more reference blocks having known velocity, or of the same material
and velocity to be tested, and having thicknesses accurately measured, and in
the range of thicknesses to be measured. Ideally, one block should have a
thickness value near the maximum of the range of interest and another block
near the minimum thickness.
6.5.2
The reference blocks/step wedge(s) shall be certified by the manufacturer and
traceable to a national standard (NIST). The record of this certification shall be
maintained on file.
6.5.3
Each reference standard/step wedge shall be serialized with a unique ID. This
serial number shall be permanently marked / etched on the surface of the block
in a manner that does not interfere with the calibration process. Calibration
standards shall be visually inspected prior to use for evidence of damage that
may be detrimental to the calibration or examination precision. Damaged
blocks shall be removed from service.
Printed or electronically transmitted documents are considered uncontrolled
Page 4 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
6.5.4
6.6
7.0
December 14, 2016
Other blocks and thickness ranges may be used when required; specifically,
when curved surfaces (<20” diameter) are to be examined, curved calibration
blocks should be used when made available.
Temperature Gauges
6.6.1
For temperatures above 100°C (212°F) (i.e. above the boiling point of water), a
temperature reading shall be taken.
6.6.2
A thermal couple (TC gauge), IR thermometer, static temperature gauge or
temperature sensitive sticks shall be used to establish the examination surface
and reference block temperatures applicable to this procedure.
CALIBRATION
7.1
Each ultrasonic system/instrument shall be certified for general operational performance
in accordance with the Linearity procedures established in Acuren Procedure CAN-CAL02P004.
7.2
Transducers shall be checked for index point when multi-element transducers and offsets
are to be considered. For single channel transducers, this is not required.
7.3
For 0° longitudinal wave examinations, the first backwall reflection from the calibration
block shall be set at 100% amplitude, +6dB. In general, it is preferred to run with a
saturated signal to minimize timing errors due to amplitude. Additionally, an adjustment
may be required on the actual material being examined to compensate for surface
conditions (paint) and material attenuation differences.
7.3.1
The A-gates or time base shall be set to provide RF data for full wall thickness.
For material thicker than 3” the gates may be adjusted to interrogate the lower
75% of wall thickness. For material thicker than 4” the gates may be adjusted
to interrogate the lower 60% of wall thickness.
7.3.2
The C-scan gates should be adjusted to include the whole A-scan. When front
surface interface noise becomes excessive the C-scan gate start points or
threshold may be adjusted (moved out) to accommodate the test. Additionally,
the gates may be readjusted during the analysis process.
7.4
The initial calibration shall be performed on the entire examination system using the
appropriate calibration block, then verified at the beginning of each day, when there is
any change in equipment or operating personnel and after every 12 hours of continuous
operation. For high temperature exams (>149°C (300°F)), calibration checks should be
performed every 4 hours of continuous operation.
7.5
A dynamic calibration scan shall be performed for each applicable calibration thickness
and transducer prior to commencement of examination. Scan shall not exceed 10”
per/second unless higher scan speeds can be established during calibration scans.
7.6
Calibration Checks may be verified statically or dynamically.
Printed or electronically transmitted documents are considered uncontrolled
Page 5 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
7.7
Calibration scans (dynamic) and calibration checks (statically or dynamic) shall be saved
on disk and/or printed in accordance with the file naming conventions established in
Appendix B.
7.8
During Calibration Checks, if there has been a change in the sweep response, the
calibration shall be corrected and the correction documented on the examination scan
sheet. Either the scans since the last calibration shall be compensated for or the areas
shall be re- examined with the adjusted calibration. Special attention should be given to
potential transducer wear for highly abrasive surfaces; calibration check intervals may
need to be increased to account for accumulative transducer wear.
7.9
Curvature (part diameter) compensation can be accommodated by, in order of priority:
7.10
7.9.1
Assuring that a NEW or flat faced transducer is used when calibrating on the
standard (flat) AUT calibration blocks.
7.9.2
Utilizing an appropriate curved calibration standard.
7.9.3
Utilizing an echo-to-echo technique when software features allow or
7.9.4
Making the appropriate “delay” shift in the data based on confirmed or
measured direct static thickness readings when using contoured transducers on
flat calibration standards. A D- 790 type or small diameter probe should be used
for the static measurement checks.
When temperatures exceed 121°C (250°F) the following Temperature compensation shall
be performed by, in order of priority:
7.10.1
7.10.2
Heating the calibration block to +/- 14°C (25°F) of the component temperature.
a)
The transducer too should be allowed to heat up to a stable temperature;
typically 1- 2 minute(s) statically or dynamically on the component or
block will achieve this. However, for air or water cooled transducers, the
transducer temperature may not ever see full component temperature.
b)
Surface temperatures of the calibration block and a representative area
of the component surface being examined shall be measured using one
of the measuring methods identified in 6.5.1. Surface temperature
readings shall be taken as a minimum at the same intervals as calibration
checks.
Utilization of the AUT software onboard temperature compensation.
a)
A temperature / delay compensation shall be used by using a multiple
echo delay measurement as a post analysis calibration adjustment.
b)
It is paramount that a minimum of two (2) backwalls are seen in the data;
gate extension should be a minimum of 2 ½ thickness.
c)
The delta between the two (2) backwall responses, after temperature
compensation represents the true thickness.
Printed or electronically transmitted documents are considered uncontrolled
Page 6 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
d)
December 14, 2016
Adjust the delay to achieve the true thickness represented by the 1st
backwall response.
Note: This approach only works with the CMAPPS or software version 7.6.3 and
higher. When automatic temperature compensation is not available one of the
other alternative approaches shall be used.
7.10.3
The temperature variance between the calibration block and the component(s)
being examined shall be noted for offline or manual temperature
compensations by technician or client.
a)
Offline temperature compensation (velocity adjustment) can be
accomplished by using the attached table. The table is based on a starting
velocity of 238.1 mils/µsec which through trial testing is the most likely
velocity on carbon steel at ambient temperature.
b)
If an alternative starting velocity is used then linear extrapolation can be
applied but use the table to establish the velocity shift. See Appendix G.
Note: For all options, the transducer too should be allowed to heat up to a stable
temperature; typically 1- 2 minute(s) statically or dynamically on the
component or block will achieve this. However, for air or water cooled
transducers, the transducer temperature may not ever see full component
temperature.
8.0
EXAMINATION
8.1
Prior to commencing the examinations,
8.1.1
The client and Acuren representative shall identify the equipment to be
examined, review the history, dimensions, surface condition and component
operating temperature. Access to the examination surface shall be determined
and any staging, surface preparation or inaccessible areas shall be reviewed.
8.1.2
The client and Acuren representative shall determine/verify the criteria for the
examination, included the scan data sampling intervals (grid size), the types of
discontinuities for detection, the thickness ranges of interest, corrosion
allowances, etc.
8.2
A uniform system for identification of areas or components examined shall be employed.
8.3
All scan start and stop locations (X-circ. & Y-axial) shall be based on absolute coordinates.
There shall be only ONE “0” reference location for each component. No two scans shall
have the same X and Y grid locations.
8.4
Components may be permanently marked using low stress steel stamps, electrochemical
etch or vibratool. As a minimum, scan areas shall be marked using a paint stick or
equivalent marker.
8.5
Reference locations shall be as follows:
Printed or electronically transmitted documents are considered uncontrolled
Page 7 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
8.5.1
Vertical Vessels
a)
8.5.2
8.5.3
December 14, 2016
Circumferential (X) – lower manway centerline or North Axial (Y) – girth
weld #1 centerline, lower head weld
Horizontal Vessels
a)
Circumferential (X) – Top Dead Center (TDC)
b)
Axial (Y) – girth weld #1 centerline, north or east weld
Piping
a)
Circumferential (X) – Top Dead Center (TDC) our OR of nearest elbow
Axial (Y) – Upstream Circ. Weld
Note: All axial (Y) measurements shall be progressive i.e. (GW-1 @ 0”, GW- 2 @ 96”, GW3 @ 192”, etc.
8.6
All circumferential (X) measurements shall be measured clockwise (right- hand rule) with
flow or positive direction established from GW-1 to GW-2. For vertical vessels, positive
direction is always established as being from bottom to top.
8.7
Unless otherwise dictated by the client, the following data collection (grid) may be used
when 100% coverage is required. The maximum data sampling interval should also not
exceed 50% of the minimum discontinuity dimension desired for detection.
Wall Thickness
T  25.4mm
Maximum Data Scanning
Interval
Not to exceed 3mm
25.4mm < T < 76.2mm
Not to exceed 6mm
76.2mm < T < 254.0mm
Not to exceed 12.7mm
Maximum Data Indexing Interval
Not to exceed ½ transducer size
(based on largest dimension)
Not to exceed transducer size
(based on largest dimension)
Not to exceed transducer size
(based on largest dimension)
8.8
Scanning speed shall not exceed the speed established during the dynamic calibration
scan or 15” per/second, whichever is less.
8.9
High resolution scanning should be performed when the areas in question require further
evaluation, using a maximum 0.05” sampling and 0.10” indexing for materials up to 1”
and .05” x .25” for materials > 1”.
8.10
8.9.1
The examination volume shall encompass the full wall thickness.
8.9.2
Additional gain, (e.g. +6 dB), may be used to allow for detection of highly
irregular or contoured pitting. Corrosion mapping accuracies may be affected
by signal amplitude when gating at a given threshold. Using saturated signals
should be considered to reduce this affect.
Examination Coverage for 0° Longitudinal Wave
Printed or electronically transmitted documents are considered uncontrolled
Page 8 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
9.0
8.10.1
The client should determine the examination coverage.
8.10.2
When 100% corrosion mapping or coverage is required, supplemental UT with
A-scan or B-scan equipment can be used to provide the additional coverage for
areas inaccessible to the scanners.
EVALUATION
9.1
The evaluation criteria SHALL be established by and is the responsibility of the CLIENT.
9.2
When evaluation criteria are not provided by the Client, all significant indications shall be
reported. The following indications shall be regarded as significant:
9.3
10.0
December 14, 2016
9.2.1
Corrosion or thickness reductions that exceed 10% of nominal wall.
9.2.2
Pitting, isolated or grouped that exceeds 10% of nominal wall.
9.2.3
Laminations.
9.2.4
Inclusion type indications that cause a total loss in backwall.
9.2.5
For cladded materials, disbonding or non-fusion.
For temperatures above 121°C (250°F) temperature correction must be considered.
REPORTING
10.1
Thickness or lamination reporting is based upon the reference system described in
paragraph 8.5.
10.2
Scan sheets, color printouts and drawings shall be reviewed and organized to ensure that
satisfactory examination coverage has been achieved and that analysis is complete, prior
to leaving the job site.
10.3
As a minimum, the AUT Technician shall prepare a draft report for the client prior to
leaving the job site. With the customer’s acknowledgement, the Final Report may be
prepared off-site and submitted to the client in a timely manner.
10.4
Acuren Final Reports have been standardized and the templates should be used unless
specific client reporting instructions are provided.
10.5
The Final Report shall contain the following information.
10.5.1
As needed, color C-scan printouts shall be generated for the examination scans.
Additionally, B-scan and A-scan should be used to enhance presentation of the
corrosion or flaws.
10.5.2
An ACAD drawing or equivalent shall be prepared to assure an accurate location
of the scans and potential subsequent repeatability.
10.5.3
C-Scan merges should be performed, as needed.
Printed or electronically transmitted documents are considered uncontrolled
Page 9 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
10.5.4
10.6
December 14, 2016
Calibration information either printed out as a direct output from the AUT
system or documented on an appropriate Calibration Sheet.
A typical ‘AUT Scan Sheet’ contains the following:
10.6.1
Customer & Location of inspection
10.6.2
Component Identification
10.6.3
Measured Circumference and Wall Thickness for each component
10.6.4
Scan File Name
10.6.5
Scan Start and Stop locations both X-Circumferential & Y-Axial
10.6.6
Channels used and any offsets that may be used.
10.6.7
Remarks and Comments
10.6.8
Technician(s), Level(s) of Certifications and appropriate dates
A typical AUT Image has been provided on the next page. It is our general policy to provide an
image for EACH and every scan that is collected.
Printed or electronically transmitted documents are considered uncontrolled
Page 10 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
Typical AUT C-Scan Image and Presentation for Reporting including the standard color pallet; the
upper end thickness should be set to at least 10% above nominal wall thickness and adjusted as
needed to highlight damage.
Note that the B-Scans are rotated to show a cross-section along the X-axis (B-Prime)
Statistical Data should be provided for each scan and the information transferred to the scan sheet(s).
RSTRENG outputs can be provided based on client’s needs.
Printed or electronically transmitted documents are considered uncontrolled
Page 11 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
11.0
December 14, 2016
ACCEPTANCE CRITERIA
11.1
The discontinuities detected with the technique shall be reported to the Client for
disposition. When requested, discontinuities shall be marked on the part.
Printed or electronically transmitted documents are considered uncontrolled
Page 12 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX A: AUT SYSTEM OPERATION
A.
AUT System Setup
1.
Connect AUT system, components and cabling in accordance with manufacturer’s
recommendations.
2.
Power up equipment and verify system performance.
3.
Using the selected transducer(s) connect the appropriate coaxial cable(s) to the appropriate
channel number (1-4) to the back of the AUT system.
B.
AUT System Calibration
1.
The following information is provided as a guide in setting up the AUT System. For additional
information, the manufacture’s manual should be used.
2.
Activate or select the applicable Calibration file (usually a MST file) and SAVE AS a new file to
assure non-corruption of the master file. It is VERY IMPORTANT not to modify the master file.
3.
Activate or Turn On the necessary channels required for data collection.
4.
Select the appropriate calibration block and position the transducer on the block surface.
5.
Adjust the gates to display the appropriate reflectors.
6.
Configure the channels as appropriate to maximize the responses from the appropriate
reflectors or backwall by adjusting the Pulser Width, Gain, Filters and Dampening.
7.
The pulse volts are usually set as high as possible to reduce need for high gain settings. Pulse
width settings ranges are as follows:
1.0 MHz
2.25 MHz
5.0 MHz
10.0 MHz
275 – 375 nanosecs
200 – 250 nanosecs
125 – 175 nanosecs
50 – 100 nanosecs
8.
Select the proper scanner parameters in accordance with the manufactures. Proper scanner
parameters are fixed and should not be altered without extreme caution.
9.
With transducer positioned, manipulate the transducer(s) to maximize responses of the
appropriate calibration reflectors.
Printed or electronically transmitted documents are considered uncontrolled
Page 13 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
10.
Perform calibration in accordance with section 6.6.1 of the main procedure. Adjust the
‘transducer delay’ & ‘material velocity’ fields to achieve an accurate time based calibration.
11.
When an “AUTO CAL” feature has not been provided, utilize the “Mater Delay & Velocity”
excel worksheet to calculate the delay and velocity measurements. Alternatively, the
transducer delay can be calculated by the following formula:
T1
T2
TU
TD
12.
=
=
=
=
Time to 1st reflector in µsec
Time to 2nd reflector (multiple) in µsec
Round-trip time for known distance as: TU = (T2-T1)
Transducer Delay as: TD = T1 – TU
The approximate material velocity for longitudinal waves is 232- mils/µsec and can be
calculated by the following formula:
Material Velocity = MP * 2 / TU in mils/per µsec X 1000
13.
Adjust the gates (at least 1 per/channel) to include the complete waveform in accordance
with coverage requirements established in Section 8.0 of the main procedure.
14.
Perform the complete calibration, including a dynamic scan of the calibration reflectors.
15.
Calibration file names shall be in accordance with Appendix B.
C.
Examination Sequence
1.
Obtain circumferential measurement of component with tape measure and verify against
drawings.
2.
Attach and align the scanner track or tracks (when used).
3.
Attach the scanner to the track or component.
Printed or electronically transmitted documents are considered uncontrolled
Page 14 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
4.
Manipulate the scanner over the surface to obtain general wall thickness measurements with
the 0° and establish the required gain (sensitivity) for the component or examination area; in
general, add 6dB (+6dB) to an 80% - 100% backwall response. Keep in mind that this is an
arbitrary setting as surface conditions fluctuate and areas of increased and decreased energy
can be expected.
5.
Make final gate adjustments based on the actual thickness measurements obtained on the
component. For painted surfaces, 2 backwall responses are preferred to assist in establishing
coating thickness compensation; i.e. echo-to-echo.
6.
Perform the examination scan using the coordinate systems previously established. When
only “0” can be used for the start coordinates, use the offset parameters to achieve the
absolute coordinates as necessary.
7.
Examination scans are performed by, inputting the scan parameters in the ‘Calibration’ or
‘Exam’ fields and then executing the ‘Scan’ key or function.
8.
Scan files (examination areas) shall be representative of the temperature measured +/- 26°C
(50°F). Scans shall be limited in size when this cannot be achieved.
9.
File naming shall be in accordance with Appendix B.
Printed or electronically transmitted documents are considered uncontrolled
Page 15 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX B: FILE NAMING
Up to 8 – 20 characters can be used for the examination or scan file name depending on the AUT system
used. The following are the file naming conventions to be used for Corrosion Mapping examinations:
File Naming Conventions
SCANWnn#
8 – 16 character file name
SCAN - - - -
Identified as scan for scan or use the actual or part of the
component identification number. For piping, use the
diameter.
----S---
S for vessel or tank shells, P for piping, E for elbows, T for
Tee’s and F for Tank Floors.
- - - - - nn -
‘nn’ refers to sequential scan number/area with 01 being the
start of the examinations or series of examinations
-------#
‘#’ Refers to scan number per axial location whereas a 1, 2, 3,
etc. would be continuations in the same axial band.
Note: For High Resolution scans and rescans, add an ‘H’ or ‘R’ to the end of the file name. For additional
or extra scans, add an ‘A’ or ‘X’ to the end of the file name, as needed.
Calibration File Naming
CImmdd#
7 character file name
CI - - - - -
‘CI’ for Cal In, ‘CC’ for Cal Check & ‘CO’ for Cal Out
- - mmdd -
‘mmdd’ refers to the Month & Day calibration
performed
------#
‘#’ Identifies the cal number for a given day
Printed or electronically transmitted documents are considered uncontrolled
Page 16 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX C: RECOMMENDED EXAMINATION AREAS
Recommended Examination Areas
Contactors / Absorbers / Regenerators / Towers
•
•
•
•
Bottom 2 shell courses; accessible areas
Mid section; accessible areas from platforms, etc.
Top shell course; accessible areas from platforms, etc.
Shell material corresponding with area subject to flow or product impingement due to
deflection plates, etc.
Accumulators / Flash Tanks / Scrubbers / Drums
•
•
•
(Horizontal Vessels)
Lower ½ of the shell courses or belly; accessible areas
Spot area for at least 1 360° scan; accessible areas
Shell material corresponding with area subject to flow or product impingement due to
deflection plates, etc.
Exchangers / Coolers / Separators
•
•
•
(Vertical Vessels)
(Horizontal)
Lower ½ of the shell material; accessible areas.
Accessible shell area on channel and/or head
Shell material corresponding with area subject to flow or product impingement due to
deflection plates, etc.
Tanks (Above Ground Storage)
•
•
•
•
Out-of-Service – Accessible floor plates (spot scans)
Out-of-Service – Accessible floor plates (annulus region – 360°)
Out-of-Service – Accessible floor plates (sump area – spot scans)
In-Service
– Accessible wall plates (spot or strip scans)
•
•
Accessible straight sections of piping, as required.
Fitting components (elbow, tee, reducer, etc.) may require manual scanner and/or
manual UT.
Piping
Printed or electronically transmitted documents are considered uncontrolled
Page 17 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX D: TYPICAL AUT SCAN SHEET
Printed or electronically transmitted documents are considered uncontrolled
Page 18 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX E: TYPICAL ACAD EXAMPLES
Typical ACAD showing C-Scan locations & C-Scan Merge
Printed or electronically transmitted documents are considered uncontrolled
Page 19 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
Typical ACAD for Vessels with or without C-scan Data
Printed or electronically transmitted documents are considered uncontrolled
Page 20 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX F: SAMPLE DATA OUTPUT (FILE CONVERSION SOFTWARE FEATURE)
Printed or electronically transmitted documents are considered uncontrolled
Page 21 of 22
CAN-AUT-02P001 REVISION 00
Automated Ultrasonic Thickness Mapping Using The Wesdyne
Amdata System
December 14, 2016
APPENDIX G: VELOCITY CORRECTION TABLES
Printed or electronically transmitted documents are considered uncontrolled
Page 22 of 22