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长输管道内的油流具有复杂的热历史和剪切历史，从相似性上说，只有管路试验才有可能对其进行模拟。利用管流试验装置对胜利原油进行了四个方面的研究，包括管流条件下的粘温关系、降温速率的影响、重复热处理的影响以及管径影响等。研究表明，降温速率对反常点以后的粘温特性有较大影响；密闭条件下进行重复热处理对油品特性几乎没有影响；管径不同，导致历史不同，因而影响低温油品的特性。“,”Oil in pipeline has complicated heat-history and shear-history，which can be simulated only by instrument of pipe-flow if similarity is considered．In this paper，the instrument was used to measure the curve of viscosity-temperature，influnce of rate of decreasing temperature，influnce of repeated heat treatments and influnce of pipe diameter．It has been found that the rate of decreasing temperature has great influnce on viscosity-temperature property of the oil below abnormal point；the repeated treatments have no effect on the property；the different diameters，resulting in different history，have some effect on the property of cold oil．