<p>The present work develops fully predictive empirical correlations for estimating the liquid entrained fraction, drop deposition mass flux, average liquid film thickness, and interfacial friction factor in vertical upwards annular flows inside pipes. Even though there are several correlations for annular flows available in the literature, the main motivation of our work was to obtain correlations applicable to a wider range of operation conditions, such as developing flows, high pressures, and transition from annular to other flow patterns. We considered the data from several sources, critically reviewing them using regime maps. The new correlations use dimensionless numbers based on information available at the flow inlet, considering the nature and expected behavior of the response variables and parameters obtained through non-linear orthogonal distance regression of experimental data from vertical upwards annular flows in different conditions. The resulting correlations showed good agreement with the experimental data, and their errors were smaller than those of pre-existing correlations available in the literature.</p>