Using Phased Array Ultrasonic Testing in Lieu of Radiography for Acceptance of Carbon Steel Plate Welds

Moran, Traci L.; Anderson, Michael T.; Cinson, Anthony D.; Crawford, Susan L.; Prowant, Matthew S.; Nove, Carol A.

doi:10.1115/pvp2014-28832

Cited by 4 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Another publication reviewed was an NRC study, Applying Ultrasonic Testing in Lieu of Radiography for Volumetric Examination of Carbon Steel Piping ( 3 ), which concluded, in part:Considering overall detections/non-detections for the piping specimens, as well as the Navy plates, it appears that PA-UT, based on the techniques applied in this study, provides an equally effective examination for identifying the presence of fabrication flaws in carbon steel welds. The PA-UT parameters applied were shown to be more effective for planar flaws, but slightly less effective for small volumetric flaws, than RT.…”

mentioning

confidence: 94%

Implementation of American Association of State Highway and Transportation Officials/American Welding Society D1.5 Phased Array Ultrasonic Weld Inspection Programs

Azari

Kok

2022

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

This paper describes highlights of phased array ultrasonic testing (PAUT) nondestructive evaluation (NDE) research activities at the Federal Highway Administration’s (FHWA’s) Advanced Sensing Technology (FAST) NDE Laboratory. The work supports the goal to implement ultrasonic techniques in lieu of radiographic techniques for American Association of State Highway and Transportation Officials (AASHTO)/American Welding Society (AWS) D1.5 Bridge Welding Codeinspection of full penetration bridge fabrication welds. The paper also describes some of the advantages and disadvantages of the process to implement a PAUT inspection program. The results of this study support the goal of broader implementation of ultrasonic testing (UT) with results to date showing a good correlation of the comparative inspection results between PAUT and radiography. There is, however, a need to develop a more comprehensive set of weld flaws to ensure a fully representative flaw set is evaluated. To support that goal, the FAST NDE Laboratory is currently using ultrasonic simulation software to 03611981221090236ement the test plate data with a virtual database of simulated flaws. A successful implementation of PAUT can result in a more efficient inspection process with detailed permanent records and images of the flaw locations mimicking the historic radiograph. As more bridge fabrications incorporate PAUT, there will be a broader PAUT experience base as the AWS committee, teamed with the bridge fabricators, FAST NDE Laboratory, and other contributors continue to work toward replacing all required radiography in AWS D1.5 with an option to use PAUT.

show abstract

mentioning

confidence: 94%

Implementation of American Association of State Highway and Transportation Officials/American Welding Society D1.5 Phased Array Ultrasonic Weld Inspection Programs

Azari

Kok

2022

Transportation Research Record: Journal of the Transportation R

View full text Add to dashboard Cite

show abstract

“…Recently, with the rapid advancement of ultrasonic testing (UT) techniques, various studies have been conducted on UT to replace RT. The Electric Power Research Institute (EPRI) has been developing various code cases by designing and fabricating pipe weld specimens and performing UT as technical grounds for replacing volumetric inspections from RT to UT [9,10]. Furthermore, UT is applied in ISI because it is advantageous for the detection of cracks, which are difficult to detect with RT.…”

Section: Introductionmentioning

confidence: 99%

Reliability Analysis of PAUT Based on the Round-Robin Test for Pipe Welds with Thermal Fatigue Cracks

Kang,

Choi,

Lee

et al. 2023

Materials

View full text Add to dashboard Cite

Thermal fatigue cracks occurring in pipes in nuclear power plants pose a high degree of risk. Thermal fatigue cracks are generated when the thermal fatigue load caused by local temperature gradients is repeatedly applied. The flaws are mainly found in welds, owing to the effects of stress concentration caused by the material properties and geometric shapes of welds. Thermal fatigue pipes are classified as targets of risk-informed in-service inspection, for which ultrasonic testing, a volumetric non-destructive testing method, is applied. With the advancement of ultrasonic testing techniques, various studies have been conducted recently to apply the phased array ultrasonic testing (PAUT) method to the inspection of thermal fatigue cracks occurring on pipes. A quantitative reliability analysis of the PAUT method must be performed to apply the PAUT method to on-site thermal fatigue crack inspection. In this study, to evaluate the quantitative reliability of the PAUT method for thermal fatigue cracks, we fabricated crack specimens with the thermal fatigue mechanism applied to the pipe welds. We performed a round-robin test to collect PAUT data and determine the validity of the detection performance (probability of detection; POD) and the error in the sizing accuracy (root-mean-square error; RMSE) evaluation. The analysis results of the POD and sizing performance of the length and depth of thermal fatigue cracks were comparatively evaluated with the acceptance criteria of the American Society of Mechanical Engineers Code to confirm the effectiveness of applying the PAUT method.

show abstract

“…The volumetric inspection techniques for the replacement of RT include ultrasonic testing (UT) using a single element transducer and phased array ultrasonic testing (PAUT) using an array of elements transducers. [9]. In the PAUT technique, a focal law is applied to control the propagation angle and focal position by electronically applying time delays for each transducer [10].…”

Section: Introductionmentioning

confidence: 99%

Reliability Assessment of PAUT Technique in Lieu of RT for Tube Welds in Thermal Power Plant Facilities

et al. 2022

View full text Add to dashboard Cite

In this study, a reliability evaluation of the phased array ultrasonic testing (PAUT) method was performed to examine the applicability of the method for tube weld specimens with flaws having the same specifications as the tubes in the boilers of thermal power plant facilities. To this end, test specimens were fabricated by inserting flaws into tube welds with identical materials and specifications to those used in the thermal power plant. PAUT data acquisition was obtained using a round robin test (RRT) on the fabricated specimen, and the data were compared with the results of radiographic testing (RT) for a comparative evaluation of the flaw detection performance. In addition, for quantitative reliability analysis, the flaw detection performance (probability of detection; POD) and the error in the sizing accuracy (root-mean-square error; RMSE) were calculated with different materials of the specimens (carbon steel, stainless steel, dissimilar metal) and flaw types (volumetric, planar). In the analysis results, for high-risk planar defects, the PAUT technique exhibited superior flaw detection performance to the RT technique. A POD analysis of the PAUT technique indicated that flaws of 6.9 mm length were detected at 80% probability for total tube specimens. Furthermore, a reliability analysis was performed for test specimens of different materials and flaw types, and the results were derived. Through the findings of this study, the applicable range of the PAUT technique was examined, and a technical basis for PAUT in lieu of RT was established.

show abstract

Using Phased Array Ultrasonic Testing in Lieu of Radiography for Acceptance of Carbon Steel Plate Welds

Cited by 4 publications

References 0 publications

Implementation of American Association of State Highway and Transportation Officials/American Welding Society D1.5 Phased Array Ultrasonic Weld Inspection Programs

Implementation of American Association of State Highway and Transportation Officials/American Welding Society D1.5 Phased Array Ultrasonic Weld Inspection Programs

Reliability Analysis of PAUT Based on the Round-Robin Test for Pipe Welds with Thermal Fatigue Cracks

Reliability Assessment of PAUT Technique in Lieu of RT for Tube Welds in Thermal Power Plant Facilities

Contact Info

Product

Resources

About