Method for heating of pipelines by means of heating tubes under utilization of the skin effect

摘要

Heating a pipeline by means of at least one ferromagnetic heat-generating pipe wherein an electric conductor is disposed along the interior length of said ferromagnetic pipe but is insulated from the inner wall thereof so that upon passage of alternating voltage through said electric conductor there is a concentrated flow of current along the inner skin of the ferromagnetic pipe to thereby generate heat in said ferromagnetic pipe, said heat being transferred to said pipeline by conduction, and controlling the amount of heat conducted to various sections of said pipeline by varying the placement density of said ferromagnetic pipe along various sections of said pipeline.