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根据原油凝点与油温或地温的关系分析管道的流动保障安全性是常用方法,然而,在实际管道输送中,原油凝点会有一定波动,但现行SY/T 5536―2004《原油管道运行规程》没有明确凝点的取值方法,故当凝点波动幅度较大时,难以直接采用该技术规范。为此,提出基于凝点的均值和标准差两个统计特征值,结合现行技术规范,综合分析凝点均值及“均值加1~3倍标准差”与油温或地温的关系,判断管道流动保障安全性的方法。针对管输原油凝点波动很大的某长输管道,分析了其常温输送的可行性,验证了该方法的实用性。(图1,表3,参10)
However, in the actual pipeline transportation, the crude oil freezing point will have some fluctuations, but the current SY / T 5536-2004 “crude oil pipeline operation Regulation ”does not specify the value of the freezing point, so when the freezing point fluctuations in the larger, it is difficult to directly adopt the technical specifications. Therefore, two statistical eigenvalues based on the mean and standard deviation of the freezing point are put forward. According to the current technical specifications, the average value of the freezing point and the relationship between the mean value plus 1 ~ 3 times the standard deviation and the oil temperature or the ground temperature are analyzed. Pipeline flow to ensure security methods. In view of the long-distance pipeline with large fluctuations of pour point of crude oil, the feasibility of its transportation at normal temperature is analyzed, and the practicability of the method is verified. (Figure 1, Table 3, reference 10)