This study aims to develop models to estimate the CO2 hydrate film formation and growth for different temperature and flow velocity conditions. First, the CO2 hydrate film thickness at the initial stage of its formation is experimentally measured under different temperature and flow velocity conditions using laser interferometry. Based on the results, the CO2 hydrate film thickness was found to decrease with increasing temperature and flow velocity. Next, the CO2 hydrate film formation model and growth model are developed, and the models are verified using the present experimental data. Finally, the long term growth of CO2 hydrate film thickness is estimated by the proposed growth model of CO2 hydrate film thickness. (c) 2016 American Institute of Chemical Engineers AIChE J, 62: 4078-4089, 2016