scholarly journals Pipeline Girth Weld Inspections Using Ultrasonic Phased Arrays

2002 ◽  
Author(s):  
Michael Moles ◽  
Noe¨l Dube´ ◽  
Ed Ginzel
Keyword(s):  
Wall Thickness ◽  
Phased Array ◽  
Phased Arrays ◽  
Pipe Wall ◽  
Gas Pipeline ◽  
Pipe Wall Thickness ◽  
Safety Hazard ◽  
Lack Of Fusion ◽  
Track Record ◽  
Ultrasonic Phased Array

Mechanized ultrasonics is rapidly replacing radiography worldwide for gas pipeline girth weld inspections. Compared with radiography, mechanized ultrasonics is more reliable, faster, has better detectability for critical Lack of Fusion defects, and poses no safety hazard. Phased arrays present major improvements over conventional multiprobe ultrasonics, both for onshore and for offshore use. Probe pans are lighter and smaller, permitting less cutback; scans are quicker due to the smaller probe pan; phased arrays are considerably more flexible for changes in pipe dimensions or weld profiles, and for different scan patterns; phased arrays have great potential for the future, such as compensating for variations in pipe wall thickness or temperature. This paper describes the evaluation of the PipeWIZARD ultrasonic phased array system for girth weld inspections, using standard ASTM E-1961 Mechanized Ultrasonics set-ups. Some typical results will be shown. The paper will describe the latest phased array UT results, plus developments like automated set-ups and improved imaging using an increased number of zones. A brief comparison of E-1961 and the recent API 1104 19th Edition codes will be made, plus a summary of approvals and track record to date.

scholarly journals Pipeline Girth Weld Inspections Using Ultrasonic Phased Arrays

2003 ◽  
Author(s):  
Michael Moles ◽  
Noe¨l Dube´ ◽  
Ed Ginzel
Keyword(s):  
Phased Array ◽  
Phased Arrays ◽  
Gas Pipeline ◽  
Safety Hazard ◽  
Lack Of Fusion ◽  
Track Record ◽  
Ultrasonic Phased Array

Automated ultrasonics is rapidly replacing radiography worldwide for gas pipeline girth weld inspections. Compared with radiography, mechanized ultrasonics is more reliable, faster, has better detection of critical Lack of Fusion defects, and poses no safety hazard. Phased arrays are the latest development in AUT, and present major improvements over conventional ultrasonics. Probe pans are lighter and smaller; scans are quicker due to the smaller probe pan; phased arrays are considerably more flexible for changes in pipe dimensions or weld profiles, and for different scan patterns for unusual defects; special scans can be made for specific problems. This paper describes the PipeWIZARD ultrasonic phased array system for girth weld inspections, based on the ASTM E-1961 code and compatible with API 1104 19th Edition. Some comments on AUT codes will be made. The paper will describe the latest phased array UT results, plus developments like automated set-ups and improved imaging using an increased number of zones. PipeWIZARD’s track record and capabilities will be illustrated.

scholarly journals Special Phased Array Applications for Pipeline Girth Weld Inspections

2006 ◽  
Author(s):  
Michael Moles ◽  
Simon Labbe´
Keyword(s):  
Wall Thickness ◽  
Temperature Compensation ◽  
Phased Array ◽  
Phased Arrays ◽  
Pipe Wall ◽  
Small Diameter ◽  
Thin Wall ◽  
Seamless Pipe ◽  
Pipe Wall Thickness ◽  
Girth Welds

Ultrasonic phased arrays present major improvements over conventional multiprobe ultrasonics for inspecting pipeline girth welds, both for onshore and for offshore use. Probe pans are lighter and smaller, permitting less cutback; scans are quicker due to the smaller probe pan; phased arrays are considerably more flexible for changes in pipe dimensions or weld profiles, and for different scan patterns. More important, some of the potential advantages of phased arrays are now becoming commercially available. These include: • Compensating for variations in seamless pipe wall thickness. • Wedge temperature compensation. • Improved focusing for thick and thin wall inspections. • Premium inspections for risers, tendons and other components. • Small diameter pipes. • Multiple displays. • Clad pipe. The paper describes the latest phased array UT results for special applications.

Special Phased Array Applications for Pipeline Girth Weld Inspections

2004 ◽  
Author(s):  
Michael Moles ◽  
Noe¨l Dube´ ◽  
Simon Labbe´
Keyword(s):  
Wall Thickness ◽  
Temperature Compensation ◽  
Phased Array ◽  
Phased Arrays ◽  
Pipe Wall ◽  
Small Diameter ◽  
Seamless Pipe ◽  
Pipe Wall Thickness ◽  
Girth Welds

Ultrasonic phased arrays present major improvements over conventional multiprobe ultrasonics for inspecting pipeline girth welds, both for onshore and for offshore use. Probe pans are lighter and smaller, permitting less cutback; scans are quicker due to the smaller probe pan; phased arrays are considerably more flexible for changes in pipe dimensions or weld profiles, and for different scan patterns. More important, some of the potential advantages of phased arrays are now becoming commercially available. These include: compensating for variations in seamless pipe wall thickness; wedge temperature compensation; premium inspections for risers, tendons and other components; small diameter pipes; multiple displays; clad pipe; portable phased arrays for tie-ins and repairs; improved sizing approaches. The paper will describe the latest phased array UT results for special applications.

Development of a mathematical model of the influence of wall thickness on the strain rate when profiling pipes by drawing

2020 ◽  
pp. 49-52
Author(s):  
R.A. Okulov ◽  
N.V. Semenova
Keyword(s):  
Mathematical Model ◽  
Strain Rate ◽  
Wall Thickness ◽  
Pipe Wall ◽  
Strain Intensity ◽  
Thickness Strain ◽  
Pipe Wall Thickness

The change in the intensity of the deformation of the pipe wall during profiling by drawing was studied. The dependence of the strain intensity on the wall thickness of the workpiece is obtained to predict the processing results in the production of shaped pipes with desired properties. Keywords drawing, profile pipe, wall thickness, strain rate. [email protected]

scholarly journals Coalescence Dynamics of Acoustically Levitated Droplets

Micromachines ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 343 ◽  
Author(s):  
Koji Hasegawa ◽  
Ayumu Watanabe ◽  
Akiko Kaneko ◽  
Yutaka Abe
Keyword(s):  
Sound Pressure ◽  
Phased Array ◽  
Phased Arrays ◽  
Industrial Applications ◽  
Acoustic Levitation ◽  
Droplet Dynamics ◽  
Levitated Droplets ◽  
Ultrasonic Phased Array ◽  
Velocity Information ◽  
The Impact

The contactless coalescence of a droplet is of paramount importance for physical and industrial applications. This paper describes a coalescence method to be used mid-air via acoustic levitation using an ultrasonic phased array system. Acoustic levitation using ultrasonic phased arrays provides promising lab-on-a-drop applications, such as transportation, coalescence, mixing, separation, evaporation, and extraction in a continuous operation. The mechanism of droplet coalescence in mid-air may be better understood by experimentally and numerically exploring the droplet dynamics immediately before the coalescence. In this study, water droplets were experimentally levitated, transported, and coalesced by controlled acoustic fields. We observed that the edges of droplets deformed and attracted each other immediately before the coalescence. Through image processing, the radii of curvature of the droplets were quantified and the pressure difference between the inside and outside a droplet was simulated to obtain the pressure and velocity information on the droplet’s surface. The results revealed that the sound pressure acting on the droplet clearly decreased before the impact of the droplets. This pressure on the droplets was quantitatively analyzed from the experimental data. Our experimental and numerical results provide deeper physical insights into contactless droplet manipulation for futuristic lab-on-a-drop applications.

Leak Testing

2021 ◽  
pp. 143-147
Author(s):  
Charles Becht
Keyword(s):  
Wall Thickness ◽  
Pipe Wall ◽  
Piping System ◽  
Pipe Wall Thickness ◽  
Pressure Testing ◽  
Leak Testing ◽  
Piping Systems ◽  
Design Pressure ◽  
Important Test

While the exercise of pressurizing a piping system and checking for leaks is sometimes called pressure testing, the Code refers to it as leak testing. The main purpose of the test is to demonstrate that the piping can confine fluid without leaking. When the piping is leak tested at pressures above the design pressure, the test also demonstrates that the piping is strong enough to withstand the pressure. For large bore piping where the pipe wall thickness is close to the minimum required by the Code, being strong enough to withstand the pressure is an important test. For small bore piping that typically has a significant amount of extra pipe wall thickness, being strong enough is not in question. Making sure that the piping is leak free is important for all piping systems.

Simulation of Ductile Tearing in a Dissimilar Material Weld up to Pipe Wall Break-Through

2010 ◽  
Author(s):  
Philippe Gilles ◽  
Alexandre Brosse ◽  
Moi¨se Pignol
Keyword(s):  
Crack Initiation ◽  
Crack Growth ◽  
Wall Thickness ◽  
Surface Crack ◽  
Pipe Wall ◽  
Ductile Crack ◽  
Pipe Wall Thickness ◽  
Ductile Tearing ◽  
Ductile Crack Growth ◽  
Computational Analyses

This paper presents ductile initiation calculations and growth simulations of a surface crack up to pipe wall breakthrough. For validation purpose, one of the two BIMET configurations is selected. The EC program BIMET has been carried out to analyze the ductile tearing behavior of DMWs through experiments and computational analyses. In the mock-up, the initial defect is an external circumferential defect located close to the weld-ferritic interface, with a depth of one third of the wall thickness. During the test, the crack extended up to two third of the pipe wall thickness. The aim of the study is to simulate the crack initiation and growth, to compare the results with the experimental records and to continue the ductile crack growth up to pipe wall break-through.

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