Stress evolution in multilayer polymer coating under thermal and pressure loading applied to the pipeline structure

Pipelines must have good mechanical properties during their service life. To improve this lifetime, a protection against corrosion is applied on the steel cylinder by coupling passive coating with an active cathodic protection. Otherwise, it well known that presence of internal stresses in organic coatings current phenomenon which can result loss adhesion. These phenomena be critical for safety and lead to expensive maintenance operations. In order identify areas overstress estimate values reached pipeline, especially its coating, development numerical models appears relevant. The show significant are present at different interfaces pipeline operation. Their change loading cases encountered transportation network. From these results, stress essentially concentrated steel/coating interface maximal value lower than 10 MPa.