Numerical study for reliability assessment of a corroding pipe to flange weld joint over its lifetime

Authors

  • Mourad Nahal Department of Mechanical Engineering, Mohamed Chérif Messaadia University, P.O. Box 1553, Souk-Ahras, 41000, Algeria
  • Abdelaziz Lakehal Department of Mechanical Engineering, Mohamed Chérif Messaadia University, P.O. Box 1553, Souk-Ahras, 41000, Algeria http://orcid.org/0000-0001-8634-7301
  • Rabia Khelif Badji Mokhtar University, BP 12, Annaba, 23000, Algeria

Keywords:

Pipeline Corrosion, Weld joint, Reliability, Finite element model, Monte Carlo, Form

Abstract

Failure probability of a corroding pipe to flange weld joint over its lifetime was investigated. A numerical model of a corroded weld joint connecting pipe to flange using finite element method was developed, and coupled with usual stress models. The structure material has been characterized experimentally. An empirical mechanical behavior model of the studied structure has been also proposed. Monte Carlo simulations, FORM and SORM methods have been applied for estimating reliability and failure probability under the both effects of corrosion and residual stress. A numerical case with high, moderate and low corrosion rates was conducted to determine the reliability of the welded connection pipe to flange. The founding results are analyzed and discussed for various corrosion rates. The obtaining result shows that the heat affected zone due to the welding process is very sensitive to corrosion effects. Hence, it is necessary to ensuring a rigorous inspection to ovoid human and environmental disasters.

Author Biography

Abdelaziz Lakehal, Department of Mechanical Engineering, Mohamed Chérif Messaadia University, P.O. Box 1553, Souk-Ahras, 41000, Algeria

Abdelaziz Lakehal received the Engineer degree in Industrial Maintenance, the Magister degree in Mechanical Engineering, the PhD degree, and the Habilitation to supervise research activities in Electromechanical Engineering, in 2004, 2007, 2013, and 2016 respectively.From 04/2012 to 10/2014, he was appointed as Lecturer in the National Higher School of Technology, Algiers. In 2014, he moved to Mohamed-Chérif Messaadia University, Souk-Ahras, Algeria, where he is currently Senior Lecturer. Before joining higher education, he was head of district, the National Company of Electricity and Gas (SONELGAZ), Algeria.His research interests include maintenance, quality reliability and safety, sensors, fault diagnosis and prediction. On the application side he is mainly interested in the field of maintenance engineering. Dr Abdelaziz Lakehal is the author and co-author of many journal and conference papers. He has served on the technical program committees of numerous conferences, and is an editorial board member and reviewer of some journals. Currently he is a chair of the scientific committee of the department of mechanical engineering.

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Published

2021-10-05