Numerical study on the evaluation of thermal and mechanical stresses during the welding of coated pipelines

作者：Belec L; Joliff Y^*

来源：Progress in Organic Coatings, 2017, 111: 336-342.

DOI：10.1016/j.porgcoat.2017.06.011

• Finite element analysis
• Multilayer coating
• Cutback
• Welding

The safety of pipeline networks is a priority, especially when these networks get older. The protection against corrosion is realized by coupling a passive coating with an active cathodic protection. It is well known that the presence of internal stresses in organic coatings is a current phenomenon which can result in the loss of adhesion. This phenomenon is critical for the durability of pipelines. The welding process and its consequences on the stress generated in the pipeline are investigated in this paper. Using a finite element approach, the welding process is simulated, and the thermal and mechanical evolutions are analyzed. From these results, the stress is essentially concentrated in the steel cylinder. Indeed, the cutback realized on the coating allow its protection during the welding.

• 出版日期2017-10