Method of determining paraffinic crude flow restart conditions

1) A method of estimating the flow restart conditions of a paraffinic hydrocarbon in a pipe, wherein the following stages are carried out:

• a) selecting a rheological model suited to the nature of the paraffinic hydrocarbon,
• b) determining the temperature and shear stress fields in the steady hydrocarbon flow, along the axis of the pipe,
• c) evaluating the conductive thermal exchanges during circulation standstills, from the steady flow temperatures and the standstill times taken into account,
• d) selecting various sections of the pipe and recording the thermomechanical scenarios undergone by the hydrocarbon in these sections,
• e) experimentally measuring the rheological parameters of said model on a sample of said hydrocarbon, according to each one of said scenarios, and
• f) taking into account said experimental measurements to evaluate the value of the pressure that restarts circulation of the paraffinic hydrocarbon in the pipe.