scholarly journals Pulsed eddy current probe optimization for steel pipe wall thickness measurement

2019 ◽  
Author(s):  
K. F. Faurschou ◽  
P. R. Underhill ◽  
J. Morelli ◽  
T. W. Krause
Keyword(s):  
Wall Thickness ◽  
Eddy Current ◽  
Pipe Wall ◽  
Thickness Measurement ◽  
Steel Pipe ◽  
Pipe Wall Thickness ◽  
Pulsed Eddy Current ◽  
Wall Thickness Measurement ◽  
Probe Optimization

Thickness measurement for non-ferromagnetic metal under the large liftoff based on the last peak point of differential pulsed eddy current signals

2020 ◽  
Vol 64 (1-4) ◽  
pp. 1119-1126
Author(s):  
Yun Song ◽  
Xinjun Wu
Keyword(s):  
Measurement Error ◽  
Wall Thickness ◽  
Eddy Current ◽  
Thickness Measurement ◽  
Eddy Current Testing ◽  
Metallic Component ◽  
Current Testing ◽  
Pulsed Eddy Current ◽  
Peak Point ◽  
Acceptable Range

Pulsed Eddy Current Testing (PECT) has been used to measure the wall thickness of ferromagnetic metallic component with thick insulation. However, for the non-ferromagnetic metallic component, there is still the problem to be solved. The main purpose of this study is to find an effective feature, to measure wall thinning of the non-ferromagnetic metallic component under the large liftoff, and further expand application of the PECT technology. Hence, the time to the last peak point (TLPP) is proposed based on the analytical predicted signals. Furthermore, the influence of the variable liftoff is studied, and the error caused by the liftoff is within the acceptable range. Two sets of experiments are conducted to test the performance of the TLPP under various liftoffs. The results show that when the wall thickness is reduced by more than 40%, the measurement error based on the TLPP is within 11%.

Analysis of Ultimate Bearing Capacity and Parameters of Steel Support Cutting Pipe Roofing Structure

2021 ◽  
pp. 036119812110597
Author(s):  
Bo Lu ◽  
Wen Zhao ◽  
Xi Du ◽  
Shengang Li ◽  
Yongping Guan ◽  
...  
Keyword(s):  
Bearing Capacity ◽  
Failure Mode ◽  
Wall Thickness ◽  
Pipe Wall ◽  
Ultimate Bearing Capacity ◽  
Steel Pipe ◽  
Pipe Wall Thickness ◽  
Steel Pipes ◽  
Construction Design ◽  
Roof Structure

A new pipe-roof construction method, the steel support cutting pipe method (SSCP), was proposed to improve the construction security and accuracy of pipe jacking as well as underground space usage. The pipe-roof method is one of the underground excavation methods which push multiple steel pipes into the soil, then connect the steel pipes horizontally to form a whole. The proposed structure’s failure mode and force characteristics were determined through theoretical analysis, and then its ultimate bearing capacity and influencing parameters were analyzed through laboratory experiments and numerical simulation. The research results show that the structure’s bearing capacity depends on the steel pipe’s buckling load; the structure’s failure mode is a result of the steel pipe’s buckling. The ultimate bearing capacity of the pipe-roof structure first increases and then decreases with the increase of the steel pipe chord height ratio. The ultimate bearing capacity reaches the maximum when the ratio is 0.33. In addition, the structure’s ultimate bearing capacity is positively related to the steel pipe wall thickness and the pipe section’s length. This can be obtained from the relationship curve showing that the steel pipe wall thickness should be selected according to the engineering requirements and that the pipe section’s length is preferably 2.3 times the diameter of the steel pipe in the construction design.

The Eddy Current Method of Alloy Drill Pipes Wall Thickness Evaluation: Impact Analysis

2019 ◽  
Vol 970 ◽  
pp. 336-342
Author(s):  
Aleksandr E. Goldshtein ◽  
Vasily Y. Belyankov
Keyword(s):  
Wall Thickness ◽  
Eddy Current ◽  
Impact Analysis ◽  
Pipe Wall ◽  
Current Method ◽  
Eddy Current Method ◽  
Pipe Surface ◽  
Thickness Change ◽  
Pipe Wall Thickness ◽  
Aluminum Pipe

The dependences of the surface eddy current probe added voltage at the interaction of the probe magnetic field with an aluminum pipe from the following main interference factors are determined: the pipe wall thickness, the gap between the probe and the surface of the pipe, the electrical conductivity of the material, the curvature of the pipe wall, the presence of areas with a smooth thickness change of the wedge character and a local spherical thinning, axis misalignment with respect to the pipe surface, the lateral misalignment of the probe axis. The problem is solved with the help of the finite element method (FEM). These data are consistent with the experimental results.

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]

Application of Automatic Ultrasonic Wall Thickness Measurement System in Nuclear Fuel Encrust Tube Billet Wall Abrasive Grinding

2012 ◽  
Vol 565 ◽  
pp. 662-667
Author(s):  
Yun Huang ◽  
Yong Sheng Chen ◽  
Wei Wan ◽  
Cao Yong Tang ◽  
Ming De Zhang
Keyword(s):  
Nuclear Fuel ◽  
Wall Thickness ◽  
Measurement System ◽  
Thickness Measurement ◽  
System Stability ◽  
Tube Billet ◽  
Wall Thickness Measurement ◽  
Main Components ◽  
Thickness Measurement System ◽  
The Way

This paper introduces an automatic ultrasonic wall thickness measurement system, which adopts the way that the tube billet is partially immersed in the water during the measurement, applied in wall abrasive grinding of nuclear fuel encrust tube billet. Meanwhile, the main components of the measurement system, as well as their characters and functions, are addressed. What’s more, the analysis of the factors, which influencing the system stability and measuring reliability, are also conducted, coupling with the system stability and measuring reliability demonstration.

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