, Volume 27, Issue 2, pp 367-374

Mechanical reliability analysis of tubes intended for hydrocarbons


Reliability analysis constitutes an essential phase in any study concerning reliability. Many industrialists evaluate and improve the reliability of their products during the development cycle—from design to startup (design, manufacture, and exploitation)—to develop their knowledge on cost/reliability ratio and to control sources of failure. In this study, we obtain results for hardness, tensile, and hydrostatic tests carried out on steel tubes for transporting hydrocarbons followed by statistical analysis. Results obtained allow us to conduct a reliability study based on resistance request. Thus, index of reliability is calculated and the importance of the variables related to the tube is presented. Reliability-based assessment of residual stress effects is applied to underground pipelines under a roadway, with and without active corrosion. Residual stress has been found to greatly increase probability of failure, especially in the early stages of pipe lifetime.

Recommended by Editor Jai Hak Park
Mourad Nahal received his Master degrees in industrial maintenance from Badji Mokhtar University. He is currently a member in LR3MI Laboratory, Badji Mokhtar University, and teacher in Mohamed Chérif Messaadia University, Souk Ahras, Algeria. His research interests are reliability engineering, noise and vibration.
Rabia Khelif obtained his Ph.D. from the University Blaise Pascal (France), Aside from being a teacher, he is also empowered to conduct research. Dr. Khelif has a Master’s in Industrial Maintenance and Reliability of Structures. He is Quality Assurance Manager at the University Badji Mokhtar, Annaba (Algeria).