Inquiring into the Thermal Calculating Method of Buried Oil Pipeline

In the thermal calculation of some heated oil pipelines, it is impossible to treat those relative parameters of material in soil around pipelines as constant. Thus, a relevant mathematic model has been set up by analysing on the thermal cases of those varied substantial soil around pipeline and the relative calculating formula and method have been analysed based on this mathematic model. Finally, the practical application of formula have been introduced by examples.