Journal Article10.1115/1.4001212
High-Density Polyethylene Piping Butt-Fusion Joint Examination Using Ultrasonic Phased Array
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TL;DR: In this paper, the authors discuss the use of ultrasonic phased array for inspection of butt-fusion joints in high-density polyethylene (HDPE) piping for nuclear applications.
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Abstract: With the increasing use of high-density polyethylene (HDPE) piping for nuclear applications, nondestructive evaluation is an important tool for evaluation of the integrity in fused joints. This paper will discuss the method of using ultrasonic phased array for inspecting butt-fusion (BF) joints in HDPE piping. The benefit of phased array is the ability to perform a volumetric inspection using multiple angles, which greatly increases the probability of detection of defects and allows the data to be analyzed using a representative two-dimensional image of the joint. It has been determined that successfully producing BF joints is highly dependent on environmental and mating-surface conditions. The primary defects of concern are lack-of-fusion, an area of the joint where there is no bond, cold fusion, an area of partial bond, and inclusion. Phased array has successfully demonstrated the ability of detecting and characterizing these defects using low frequency ultrasound. Factors addressed include joint location, wall thickness, material temperature, transducer wedge material, and manual versus automated data acquisition.
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Citations
Effect of insufficient homogenization during the extrusion of polyethylene pipes on butt fusion joint integrity
TL;DR: In this article, the effect of insufficient homogenization of pigmented resin in polyethylene (PE) pipes on the integrity of the subsequent butt fusion joints and the development of a test to quantify the amount of windows in the pipe was described.
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Investigating the Effects of Defects and the Effect of Geometric Anisotropy in Stainless Steel Pipes: Phased Array Ultrasonic Test, Sh-wave
TL;DR: In this article , the results of geometric anisotropy studies of group velocity and phase of horizontally polarized shear waves (SH-waves) for stainless steel pipe were presented, and a new use of the method of increasing the number of probes in PAUT was reported to detect defects, especially corrosion defects.
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Study and Evaluation of Advanced TOFD Method for Inspection of Polyethylene Pipes but Welding
Mohammad H. Taghipour
- 01 Jan 2015
TL;DR: In this paper, the authors used TOFD (Time of Flight Diffraction) method which employs low frequency probe and concentrate on the inspection area that longitudinal waves turn into transverse waves has been used.
3
Detecting Cold Weld Defects in HDPE Piping Thermal Fusion Welds Based on Microwave Technique
TL;DR: In this paper, an effective method for detecting the cold weld defects in the thermal fusion weld of high-density polyethylene (HDPE) pipelines based on microwave technique is proposed.
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Focal Law Optimization and Acoustic Field Simulation of PAUT on CFRP Radii
Zhongbing Luo,Fei-long Li,Huanqing Cao,Shijie Jin,Li Lin +4 more
- 01 Jul 2018
TL;DR: In this article, the focal law and ultrasonic field of phased array ultrasonic testing (PAUT) on carbon fiber reinforced plastic (CFRP) laminates radii were studied based on numerical modeling.
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References
Preliminary Assessment of NDE Methods on Inspection of HDPE Butt Fusion Piping Joints for Lack of Fusion
Susan L. Crawford,Steven R. Doctor,Anthony D. Cinson,Stephen E. Cumblidge,Michael T. Anderson +4 more
- 01 Jan 2009
TL;DR: In this paper, a series of butt joints were fabricated in 3408, 12-inch IPS DR-11 material by varying the fusion parameters in attempts to provide good joints and joints containing LOF.
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Technical Letter Report - Preliminary Assessment of NDE Methods on Inspection of HDPE Butt Fusion Piping Joints for Lack of Fusion
Susan L. Crawford,Stephen E. Cumblidge,Steven R. Doctor,Thomas E. Hall,Michael T. Anderson +4 more
- 29 May 2008
TL;DR: In this paper, the U.S. Nuclear Regulatory Commission (NRC) has a multi-year program at the Pacific Northwest National Laboratory (PNNL) to provide engineering studies and assessments of issues related to the use of nondestructive evaluation (NDE) methods for the reliable inspection of nuclear power plant components.