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STATE OF THE ART PRODUCTS & SERVICES

FOR NON-DESTRUCTIVE TESTING

BALANCE FIELD ELECTROMAGNETIC TECHNIQUE

INSPECTION REPORT

OF THE

8_INCH_1260_FITTING (HA-2/1200 BLOCK)

AT

IN

BY

TESTEX, INC.

TESTED: JANUARY 9, 2019

AUTHOR:

REVIEWED BY:

REVIEWED DATE: JANUARY 9, 2019

TABLE OF CONTENTS

1.0 RESULTS AND CONCLUSIONS 1

2.0 UNIT DETAILS 2

3.0 VESSEL TEST MAP 3

4.0 TYPICAL WAVEFORM

APPENDIX A – SAMPLE WAVEFORMS

APPENDIX B – CALIBRATION

APPENDIX C – TEST METHODS / PROCEDURES

APPENDIX D – PRELIMINARY REPORT

2.0 UNIT DETAILS

8_INCH_1260_FITTING (HA-2/1200 BLOCK)

-2-

Orientation: Vertical

Material: Stainless Steel

Height: 2nd

Deck

Diameter: 8” x SCH 40

8.625” x 0.322” NWT

Length: ~6’ - 7.25”

APPENDIX A – SAMPLE WAVEFORMS

APPENDIX B – CALIBRATION

APPENDIX C – TEST METHODS / PROCEDURES

APPENDIX C - Test Methods / Procedures and Equipment Description

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HAWKEYE Weld Scanning System

The Hawkeye Weld Scanning System is based on the eddy current principles of electromagnetic

techniques and replaces the old laborious techniques such as vacuum box, dye penetrant, or

magnetic particle inspection. Unlike UT, the system does not demand a clean surface and is

forgiving to scale, corrosion products, etc.

ECT Theory of Operation

Wall losses and pitting can be detected by injecting a high frequency magnetic field into

the material and measuring the distortions in the resulting magnetic field that occur in a flawed

region of the material. This distortion in the magnetic field can be measured as a change in phase

and amplitude in the secondary voltage generated by the material and is based on the reflective

impedance method.

Equipment Description

ELECTRONICS:

The TS-2000 System is an all-digital, microprocessor-controlled instrument. It contains

all necessary electronics for collection of data using the Eddy Current Inspection Principles

Method

SOFTWARE:

The Hawkeye Weld Scan System contains all software for data acquisition. The

software consists of two separate modules: the data acquisition module, and the data analysis and

display module.

The data acquisition module collects the tube data at a given sample rate. The menu

driven, user-oriented program provides for real-time display of phase, amplitude and probe

position in the tube. The row of the tube, probe speed and other bookkeeping details are also

handled by the data acquisition module.

The data analysis and display module contains the calibration curves for wall thinning,

volume losses, pits, vibration/fret wear and correlates the calibration standard information with the

actual plant data for flaw sizing and evaluation. It has routines for digital filtering, averaging

techniques, background evaluation, curve fitting, and other useful signal processing techniques.

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Detection Accuracy

The TesTex, Inc. developed lock-in amplifier is capable of measuring very low level

signals in the microvolt range and can measure small phase angle changes of a fraction of a degree,

even in the presence of a considerable amount of noise. The system, when used in conjunction with

the calibration standards: partial and thru-wall pitting, gradual wall thinning, vibration/fret wear,

comes within five volume percent.

Calibration is always performed in our lab prior to leaving for the job site. The same

calibration is then performed at the job site. This assures that the overall system experiences no

interference by drift, changes in line voltage, or other RF interference at the site. We also use an

isolation transformer to clean up line noise.