Abstract: A calculation method that is used to determine the throughput according to market demand and compute the lengh of contaminated product with Austin-Palfrey equation, which can calculate the volume of contaminated product in each pipe-section and the content of each product in contaminated product, is presented. The computed results of the quality potential for each product can be used to determine the fraction of each pure product needed to blend the overall mixture oil, which can be used to determine batch cycles/ batch volume, and after that the each station's tank/tank farm capacity for each product can be finally determined in accordance with the computed results of batch cycles/batch volume.