The onset of pipewall failure during “in-service” welding of gas pipelines

The prediction of burn-through has been achieved using thermo-elastoplastic model. This study has investigated earlier work and translates the temperature field into an effective radial deflection in the pipe-wall thickness. This information can be used to calculate a safe working pressure during 'in-service' welding. The simulation of the early stages of pipe-wall failure of circumferential fillet welding using a thermo-elastic plastic analysis has been successfully demonstrated.