Investigation of fast and accurate reticle defect assessment methods using STARlight for chrome-on-glass reticle defects

2000 ◽  
Author(s):  
Ingrid B. Peterson ◽  
Kaustuve Bhattacharyya ◽  
Enio L. Carpi ◽  
Darius Brown ◽  
Martin Verbeek ◽  
...  
2017 ◽  
Vol 898 ◽  
pp. 1063-1068
Author(s):  
Deng Zun Yao ◽  
Zhi Wen Li ◽  
Jian Wu Liu ◽  
Lin Chen

In the pipeline construction, the girth welds tend to be the weakness because of defects and microstructural heterogeneities. The importance of suitable assessment of various defects in the weld is not only to prevent the cracks from unstable growth to cause catastrophic accident but also can effectively reduce the weld repair to reduce construction cost. Although many welding defects assessment methods and codes have been applied in this field, there are many differences among them. In this paper, the application of weld defect assessment methods was extensively studied. The key points of ECA applications, such as the pipeline axial stress and toughness, have been introduced. Furthermore, some suggestions were given on the application of girth weld ECA assessment.


Author(s):  
Konrad Reber ◽  
Michael Beller ◽  
Neb I. Uzelac

The paper describes which aspects of tool accuracy are important for the choice of ILI tools and design of new ones. It is discussed what constitutes an inspection run comparison. What kind of work is carried out, especially if several ILI vendors are involved? What kind of integrity statement can be deduced and how is this influenced by tool accuracy? Finally, the paper will discuss how some aspects of fracture mechanics affect the design of crack detection pigs. What are the minimum requirements for an ILI tool to allow for reasonable defect assessment? In addition, relation between companies performing In-Line Inspection (ILI) and those providing defect assessment is discussed. To what degree should an inspection company also deal with issues of pipeline integrity?


Author(s):  
W. Zhao ◽  
A. Stacey

The defect distribution is a particularly important parameter in the application of probabilistic defect assessment methods to the integrity assessment of welded structures. However, the subject is complex and, despite considerable research efforts in this area and the availability of a significant body of data, this defect distribution is subject to considerable variability and uncertainty. This paper reviews the data in the literature, providing a status review of defect distributions and the identification of areas requiring further investigation, with a view to assisting with the future development of probabilistic defect assessment methods.


2008 ◽  
Vol 2008.61 (0) ◽  
pp. 155-156
Author(s):  
Ryota EGASHIRA ◽  
Shigeru HAMADA ◽  
Hiroshi NOGUCHI

2016 ◽  
Vol 850 ◽  
pp. 881-888
Author(s):  
Jiang Qiao Wu ◽  
Deng Zun Yao ◽  
Xin Ran Yuan ◽  
Tian Qi Wang ◽  
Long Zhang

In the pipeline construction, the girth welds tend to be the weakness because of defects and microstructure. The importance of suitable assessment of various defects in the weld is not only to prevent the cracks from unstable growth to cause catastrophic accident but also can effectively reduce the weld repair to reduce construction cost. Although many welding defects assessment methods and codes are used in this field, there are many differences among them. In this paper, the welding defect assessment methods, such as API 1104 and BS7910, were studied. The results show the key factors that affect the result of these assessment methods. The application of these methods was also discussed. The results indicate that API 1104 level1 has the highest conservatism, while API 1104 level 2 is next.


1998 ◽  
Vol 15 (3-4) ◽  
pp. 337-346 ◽  
Author(s):  
G.A. Webster ◽  
K.M. Nikbin ◽  
M.R. Chorlton ◽  
N.J.C. Celard ◽  
M. Ober

2017 ◽  
Vol 17 (07) ◽  
pp. 1750069 ◽  
Author(s):  
Chanyalew Taye Belachew ◽  
Mokhtar Che Ismail ◽  
Saravanan Karuppanan

Pipelines are one of the most efficient means for transporting hydrocarbons from one point to the other. However, there is a great risk of pipelines operation failure due to the detrimental effects of corrosion. At the point of corrosion, the pipe wall becomes thinner and loses its mechanical resistance. In such cases, reliable defect assessment methods are necessary to decide whether to resume continual operation or to shut down for maintenance or replacement. However, the available assessment methods are over-conservative, which enforce either unnecessary maintenance or premature replacement. Furthermore, the defect assessment methods should not only ensure safe operation, but also optimized operation cost. Therefore, a new assessment method was developed based on the nonlinear finite element (FE) analysis and a parametric study of geometric parameters related to the corrosion defect. The new method was validated with burst test database, which can predict the burst pressure of corroded pipelines with better accuracy and consistency.


Author(s):  
Gilbert G. Kuperman ◽  
Richard W. Moss ◽  
Robert A. Bondurant

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