魏荆输油管道由于采用了加剂低温输送,致使管道管壁结蜡严重,当量管径交小。通过对1992～1998年魏荆输油管道的实际运行工况参数的分析,认为管径的变化有一定的规律,指出适当的反输可延长机械清管周期。分析了当量管径缩小的利弊,为管道的最佳运行提供了参考。 Wei Jing oil pipeline due to the use of additive cryogenic transport, resulting in serious pipe wall wax, equivalent to a small diameter. Through the analysis of the actual operating parameters of Wei Jing oil pipeline from 1992 to 1998, it is considered that there is a certain rule in the variation of the pipe diameter. It is pointed out that appropriate reverse transportation can prolong the period of mechanical pigging. The advantages and disadvantages of reducing the equivalent pipe diameter are analyzed, which provides a reference for the optimal operation of the pipe.