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PRCI PR-250-9612
- Automation of FAST Ultrasonic Technique for Weld
- Report / Survey by Pipeline Research Council International, 01/01/1998
- Publisher: PRCI
$25.00$49.00
L51777e
Feole Technologies, Inc.
Need: Ultrasonic examination of welded joints for integrity is a generally accepted practice in all industries. Radiography is more often the examination chosen for the permanent record provided ease of interpretation Recent developments in recording and imaging of ultrasonic data can provide an acceptable alternative to the baseline radiograph. This is due to the ability of the recorded ultrasonic data to be reconstructed or viewed during fabrication or at a later date thereby providing information of similar quality as that of a radiograph. This ability to record and image ultrasonic examinations of archival and reproducible quality is relatively costly as compared to radiography.
Benefit: This project has taken a newly developed ultrasonic examination technique that is capable of detecting, characterizing, and sizing flaws with fewer errors and less time than ever before and applying the automated data recording and imaging technologies for a more economical and more desirable pipeline ultrasonic examination process. FAST TM (Flaw Analysis & Sizing Technique) is a conceptually simple but extremely innovative and highly effective ultrasonic weld examination technique. The development of this technique was accomplished to reduce weld examination time while improving examination quality for manual examiners in radiation areas in the nuclear power industry. Testing the technique was performed on controlled samples with flaws of varying positions, orientations, and sizes. The materials ranged in thickness from .237 inches to 4.0 inches and included stainless steel, carbon steel, and clad carbon steel. The geometrics of the butt welds included excess root, heavy counterbores, mismatch and generally any condition field welds might contain.
Result: Ultrasonic examiners were Level lls and received one week of training on the FAST TM technique prior to testing. These test results showed faster examination times, half the errors of conventional techniques (clean areas called flawed and flawed areas called clean), no deep flaws were missed, axial flaw detection was better, and overall flaw sizing was the same and better in some cases as many of the more sophisticated techniques.
Feole Technologies, Inc.
Need: Ultrasonic examination of welded joints for integrity is a generally accepted practice in all industries. Radiography is more often the examination chosen for the permanent record provided ease of interpretation Recent developments in recording and imaging of ultrasonic data can provide an acceptable alternative to the baseline radiograph. This is due to the ability of the recorded ultrasonic data to be reconstructed or viewed during fabrication or at a later date thereby providing information of similar quality as that of a radiograph. This ability to record and image ultrasonic examinations of archival and reproducible quality is relatively costly as compared to radiography.
Benefit: This project has taken a newly developed ultrasonic examination technique that is capable of detecting, characterizing, and sizing flaws with fewer errors and less time than ever before and applying the automated data recording and imaging technologies for a more economical and more desirable pipeline ultrasonic examination process. FAST TM (Flaw Analysis & Sizing Technique) is a conceptually simple but extremely innovative and highly effective ultrasonic weld examination technique. The development of this technique was accomplished to reduce weld examination time while improving examination quality for manual examiners in radiation areas in the nuclear power industry. Testing the technique was performed on controlled samples with flaws of varying positions, orientations, and sizes. The materials ranged in thickness from .237 inches to 4.0 inches and included stainless steel, carbon steel, and clad carbon steel. The geometrics of the butt welds included excess root, heavy counterbores, mismatch and generally any condition field welds might contain.
Result: Ultrasonic examiners were Level lls and received one week of training on the FAST TM technique prior to testing. These test results showed faster examination times, half the errors of conventional techniques (clean areas called flawed and flawed areas called clean), no deep flaws were missed, axial flaw detection was better, and overall flaw sizing was the same and better in some cases as many of the more sophisticated techniques.
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