Sand particles which are frequently entrained with the production fluids while transporting from reservoir to surface facilities can cause severe damage to production facilities. The mechanical damage is referred to as solid particle erosion. The mechanism of sand erosion of pipelines due to multiphase flows is complex because of the coupling of several factors that affect the severity of erosion. This work focuses on improving the one-dimensional slug flow erosion model which has been implemented into the Sand Production Pipe Saver (SPPS) software. The improvements are based on the understanding obtained after performing a several sand sampling experiments. The current model determines the mass fraction of sand particles responsible for erosion to the elbow which is determined by an energy dissipation concept. The model predictions are compared with the erosion data bank at the Erosion/Corrosion Research Center. The data comprises the effect of particle characteristics flow velocities and liquid viscosity. The limitations of the model under specific flow conditions are also discussed.