Corrosion defect harmfulness by domain failure assessment diagram
| Autor: | O. Bouledroua, Mohammed Hadj Meliani, Guy Pluvinage |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0209 industrial biotechnology
Safety factor business.industry Diagram Probabilistic logic 02 engineering and technology Structural engineering Domain (mathematical analysis) Standard deviation Corrosion 020303 mechanical engineering & transports 020901 industrial engineering & automation 0203 mechanical engineering Limit analysis business Failure assessment Mathematics |
| Zdroj: | Pipeline Science and Technology. 2:163-177 |
| ISSN: | 2514-541X |
| DOI: | 10.28999/2514-541x-2018-2-3-163-177 |
| Popis: | WE ARE REPORTING in this study the detection of 1888 corrosion defects using a magnetic pig over 70 km of a pipeline located in Algeria. This large amount of defects has been statistically analysed. The relative defect depth a/t exhibited a large scatter and no correlation was found between corrosion defect depth and length. For the necessity of repairing defect, two tools are available: the first is based on limit analysis and called the estimated repair factor (ERF) while the second is based on the failure assessment diagram. The adopted tool in the current study was the domain failure assessment diagram (DFAD). Analysis made with FAD concerns 66.8% of corrosion defects, with a limit analysis (LA) of 32.5%.After categorizing the corrosion defect according to the used analysis tool, the safety factor or probability of failure of each assessment point was determined and compared to the repairing criteria. It appears that the ERF criterion is more conservative in our case than the probabilistic criterion as a probability of failure of 10-4 or a non-dimensional crack driving force equal to mean minus three standard deviations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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