针对石油储运过程中存在着严重的蒸发损耗问题，建立一个小型锥顶金属罐蒸发损耗实验测试平台，用来测定70#气油的大、小呼吸蒸发损耗过程，涉及到温度场分布、浓度场（饱和度）分布、排气量、损耗量（率）等因素，获得了一些结论及数据，加深了油品蒸发损耗规律的认识。 Aiming at the problem of serious evaporation loss in the process of petroleum storage and transportation, a small cone evaporation test bench for metal cans was established to measure the large and small respiratory evaporation loss of 70 # gas oil, which involved the distribution of temperature field, concentration Field (saturation) distribution, exhaust volume, loss (rate) and other factors obtained some conclusions and data, deepen the understanding of oil evaporation loss law.