Automated Ultrasonic Testing for Mapping and Correlation With ILI Internal Pitting Measurements

2002 ◽  
Author(s):  
Bryan R. Scott ◽  
David K. Jolivette ◽  
Eric M. Sjerve
Keyword(s):  
Ultrasonic Testing ◽  
Ultrasonic Inspection ◽  
Damage Mechanism ◽  
Quantitative Comparison ◽  
Automated Inspection ◽  
Corrosive Environment ◽  
Bottom Part ◽  
Internal Corrosion ◽  
Manual Methods ◽  
Automated Process

This paper presents a methodology for automated ultrasonic inspection of internal corrosion on product pipelines. The automated process replaces the standard manual methods of inspection and uses the ultrasonic ILI tool data to localize the areas of corrosion on the exposed joint. Typically, only the bottom part of the pipe must be inspected due to the predominant damage mechanism being sediment fallout that tends to collect on the bottom of the pipelines producing a corrosive environment. The result is a superior inspection, due to the increased speed, reliability and reproducibility that automated inspection provides. The ultrasonic ILI tool data and the automated ultrasonic data can also be directly compared to each other to provide a quantitative comparison between the two inspection methods. This has shown that the ILI data and the automated ultrasonic data correlated well with regards to the location and overall corrosion dimensions.

Features of ultrasonic control of butt welded joints of polyethylene pipes

2020 ◽  
pp. 46-52
Author(s):  
N.P. Aleshin ◽  
D.M. Kozlov ◽  
L.YU. Mogilner
Keyword(s):  
Quality Control ◽  
Welded Joints ◽  
Ultrasonic Testing ◽  
Ultrasonic Inspection ◽  
Mechanical Tests ◽  
Ultrasonic Control ◽  
Lack Of Fusion ◽  
Polyethylene Pipes ◽  
End To End

The reliability of ultrasonic testing (UT) of the quality of welded joints of polyethylene pipelines, made end-to-end with a heated tool, is considered in comparison with mechanical tests and radiography. The greatest detection of solid defects is provided by ultrasonic inspection with the use of chord tipe probes (not less than 90 %). When detecting defects translucent for ultrasound (lack of penetration, lack of fusion, etc.), the reliability decreases to 70÷80 %. Keywords: welding, polyethylene pipeline, quality control, ultrasonic testing, chord tipe probe. [email protected]

scholarly journals Effect of Surface Roughness on Ultrasonic Testing of Back-Surface Micro-Cracks

2018 ◽  
Vol 8 (8) ◽  
pp. 1233 ◽  
Author(s):  
Zhe Wang ◽  
Ximing Cui ◽  
Hongbao Ma ◽  
Yihua Kang ◽  
Zhiyang Deng
Keyword(s):  
Surface Roughness ◽  
Ultrasonic Testing ◽  
Amplitude Ratio ◽  
Ultrasonic Inspection ◽  
Front Surface ◽  
Signal Amplitude ◽  
Back Surface ◽  
Element Analysis ◽  
Arithmetic Average ◽  
Micro Cracks

Surface roughness is one of the main factors that affect the ultrasonic testing of micro-cracks. This article theoretically analyzes the relationship between the changes in the energy intensity of crack echo waves and roughness-modified transmission coefficients. A series of simulations are carried out using two-dimensional sinusoidal curves as rough surface. Then, parallel experiments are performed on sample surfaces with different arithmetic average heights (Ra). The signal amplitude ratio factor (SARF) is defined to assess the ultrasonic detection capacity for micro-cracks. Both finite element analysis and experimental results show that signal amplitude decreases with an increase in Ra, resulting in signal-to-noise ratio loss. Amplitude attenuation caused by the rough back surface is less than that caused by the rough front surface. It is difficult to identify the signal of micro-cracks with a depth less than 400 μm when the Ra of the front surface is larger than 15 μm. Cracks with depths of more than 200 μm can be distinguished when the back-surface roughness is less than 24 μm. Furthermore, the amplitude of the micro-crack signal increases slightly with variation in the horizontal parameter (Rsm). This study provides a valuable reference for the precision evaluation of micro-cracks using ultrasonic inspection.

scholarly journals Ultrasonic Inspection Techniques Possibilities for Centrifugal Cast Copper Alloy

2017 ◽  
Vol 17 (2) ◽  
pp. 35-38 ◽  
Author(s):  
R. Konar ◽  
M. Mician
Keyword(s):  
Ultrasonic Testing ◽  
Copper Alloy ◽  
Ultrasonic Attenuation ◽  
Ultrasonic Inspection ◽  
Single Element ◽  
Experimental Sample ◽  
Centrifugally Cast ◽  
Experimental Part ◽  
Conventional Ultrasound ◽  
Inspection Techniques

Abstract The article deals with ultrasonic testing possibilities of the copper alloy centrifugal casts. It focused on the problems that arise when testing of castings is made of non-ferrous materials. Most common types of casting defects is dedicated in theoretical introduction of article. Ultrasonic testing technique by conventional ultrasound system is described in the theoretical part too. Practical ultrasonic testing of centrifugal copper alloy cast - brass is in experimental part. The experimental sample was part of centrifugally cast brass ring with dimensions of Ø1200x34 mm. The influence of microstructure on ultrasonic attenuation and limitations in testing due to attenuation is describes in experimental part. Conventional direct single element contact ultrasound probe with frequencies of 5 MHz, 3.5 MHz and 2 MHz were used for all experimental measurements. The results of experimental part of article are recommendations for selecting equipment and accessories for casting testing made of non-ferrous metals.

scholarly journals PIPE CONDITION ANALYSIS USING ULTRASONIC TESTING TO PREDICT THE REMAINING SERVICE LIVE (RSL) OF THE PETROLEUM DISTRIBUTION PIPELINE

Konversi ◽  
2019 ◽  
Vol 8 (2) ◽  
Author(s):  
Sarah Dampang ◽  
Nanang Burhan ◽  
Cindi Ramayanti
Keyword(s):  
Service Life ◽  
Ultrasonic Testing ◽  
Petroleum Industry ◽  
Initial Step ◽  
Preventive Action ◽  
Destructive Testing ◽  
Internal Corrosion ◽  
Remaining Service Life ◽  
External Corrosion ◽  
Carbon Dioxide Co2

The pipeline network in the petroleum industry is very susceptible to corrosion.  Corrosion problems can cause losses that are not small financially.  Corrosion that occurs in underground pipes can be in the form of external corrosion on the outer surface of the pipe caused by acid content in the air or in the soil or internal corrosion inside the pipe caused by petroleum content in the form of water, carbon dioxide (CO2) and hydrogen sulfide (H2S).  Corrosion causes the useful or service life of these pipes to be shorter than expected.  This study aims to measure the Remaining Service Life (RSL) of the petroleum distribution pipeline as an initial step of preventive action to avoid fatal consequences of corrosion problems.  In this study, ultrasonic testing was used as one of the Non Destructive Testing (NDT) methods to check the condition of the petroleum distribution pipe's wall.  In this study, it is found that the Remaining Service Life (RSL) of the pipeline under investigation is 25 years.

Scanners for Ultrasonic Inspection

NDT World ◽  
2015 ◽  
Vol 19 (4) ◽  
pp. 77-80
Author(s):  
Цомук ◽  
Sergey Tsomuk ◽  
Ястребов ◽  
Viktor Yastrebov
Keyword(s):  
Base Metal ◽  
Manufacturing Process ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Detection Efficiency ◽  
Ultrasonic Inspection ◽  
Flaw Detection ◽  
Piezoelectric Transducers ◽  
Large Dimension ◽  
Testing Problem

In recent years, to enhance flaw detection efficiency when using ultrasonic testing, phased array probes are increasingly used. However, in many cases this can also be achieved by using scanning devices with conventional piezoelectric transducers, which is much cheaper. The purpose of the article is to analyze the design and operation of such scanning devices. The article provides brief information about ultrasonic testing main scanning schemes, describes scanners that have been developed and widely used to perform inspection of welds, base metal of pipes, railcar axles and wheels. It is shown that, for large dimension objects, scanners allow not only a significant increase in the scanning performance but also solve the testing problem in principle, and (for example, when testing railcar axles) change (make it easier and cheaper) manufacturing process, including inspection operations and wage wheels repair. As a result of analysis, conclusions are made about the efficiency of using, in specific and important practical tasks, scanning devices for ultrasonic testing of steel products of different sizes, which certainly does not deny the application perspectiveness of using phased array probes.

scholarly journals A Novel of Internal Corrosion Assessment Methods on Drinking Water Distribution Pipelines

2018 ◽  
Vol 248 ◽  
pp. 05008
Author(s):  
Edi Septe ◽  
Nizwardi Jalinus ◽  
Refdinal
Keyword(s):  
Drinking Water ◽  
Ultrasonic Testing ◽  
Water Distribution ◽  
Sampling Method ◽  
Inspection Method ◽  
Internal Corrosion ◽  
Scanning Method ◽  
Testing Method ◽  
Drinking Water Distribution ◽  
Corrosion Assessment

Various methods of corrosion assessment on drinking water distribution pipelines have been reviewed in this paper. Five methods of corrosion assessment consisting of sampling method, scanning method, ultrasonic testing method, electromagnetic inspection method and corrosion index assessments described provide valuable information regarding their implementation mechanisms. Since each method has its advantages and limitations, the application of methods on the pipeline must consider the environmental conditions of the pipeline to be inspected, as well as the equipment and resources available.

Application of Flexible Ultrasonic Phased Array Technique on Detection of Fillet Welds in Small-Diameter Pipe Holder

2017 ◽  
Author(s):  
Weican Guo ◽  
Cunjian Miao ◽  
Xingji Du ◽  
Min Wang ◽  
Junfang Xia
Keyword(s):  
Nondestructive Testing ◽  
Ultrasonic Testing ◽  
Phased Array ◽  
Coupling Effect ◽  
Ultrasonic Inspection ◽  
Technical Problem ◽  
Small Diameter ◽  
Pressure Vessels ◽  
Fillet Welds ◽  
Diameter Pipe

Fillet welds in small-diameter pipe socket of pressure vessels always have complicated structures and groove types, which make it easy to produce porosity, lack of fusion, incomplete penetration and other flaws during welding. Therefore, nondestructive testing is a significant and meaningful approach to ensure the quality of welding for pressure vessels’ safety. Ultrasonic testing is the main method for nondestructive testing of pipe fillet welds. However, it is difficult to distinguish between the interference wave and the flaw echo, or to recognize the defect signal, while utilizing conventional ultrasonic testing technology. Additionally, the coupling effect is bad for traditional rigid probe on the concave surface when the probe is inserted into the small-diameter pipe to do the inner scanning. To obtain a good coupling effect, flexible phased array technology was put forward, with a bendable probe made from flexible materials. The probe could be bent and inserted into the inner pipe for longitudinal wave scanning, giving a good matching with the inner wall and replacing the traditional rigid probe. Besides, it is more convenient to conduct the ultrasonic testing, and the focal law could be changed easily according to the curve shape of the inner pipe, without replacing the probe. Thus, scanning and dynamic focusing in multiple angles and directions can be carried out, and the position, distribution and size of the flaws could be displayed intuitively combined with real-time imaging technology. This technology is able to obtain better coupling and detecting effects and solve the technical problem for concave ultrasonic inspection of fillet welds.

Inner Pressure/Bending Creep Test on Circumferentially Welded Large Diameter Pipe of Grade 91 Steel: Creep Damage Mechanism and Applicability of NDE

2016 ◽  
Author(s):  
Satoshi Nishinoiri ◽  
Yukio Takahashi ◽  
Hiroyuki Fukutomi ◽  
Masatsugu Yaguchi
Keyword(s):  
Creep Test ◽  
Welded Joints ◽  
Welded Joint ◽  
Large Diameter ◽  
Ultrasonic Inspection ◽  
Creep Damage ◽  
Damage Mechanism ◽  
Joint Surface ◽  
Internal Defects ◽  
Inner Pressure

In this study, an inner pressure/bending creep test on a circumferentially welded large diameter 9Cr steel pipe was conducted at a temperature of 650°C to investigate the creep damage mechanism and applicability of nondestructive evaluation techniques to the detection of creep damage. The test was interrupted before steam leakage based on a change in axial strain at the surface of the welded joint. Surface cracks were observed at the lower part of the specimen along the circumferentially welded joint where axial tensile stress was applied. As a result of phased array ultrasonic inspection, indications of internal defects were first detected along welded joints where the failure life ratio was 54% with the range of indication increasing with test time. The indications of internal defects were in good agreement with observations of sectional views in welded joints.

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