The electric heating cable is used in the winter pipeline to prevent freezing and design a accompanying heat preservation type product, the electric heat tracing cable product to lay to the pipeline surface can play the role of preventing freezing heat preservation and melting the role of ice. The electric heating trace cable as the new electric heat product has been widely used in the major industry and civil pipeline, which takes the liquid pipeline heat preservation as the main.

                   When the electric heating trace cable in use may be due to a variety of reasons and the use of temperature than the preset temperature of high or low situation, this time in which there is a problem, as for which link is a problem, in the absence of investigation before is unable to know, the user can be through the following kinds of causes of failure to investigate.

                     The electric heat trace cable belt in the design fails to estimate correctly needs to accompany the heat medium flow pattern or the process operating temperature:
　　             Solution: in accordance with the current medium flow pattern and temperature requirements, the electric accompanied by heat system redesign, to determine the process conditions, general supplementary installation of electric heating cable.

                    May have installed different specifications of the electric heating tape and the use of power is not calculated accurately:
　　           Solution: check the electric accompanying tropical specifications on the pipeline, if found different specifications need to re-design the calculation, when needed, respectively, add temperature controller, or directly replace the accompanying tropical.

                      Installed the performance is not consistent with the electric accompanied by tropical:
　　             Solution: correctly calculate the installation power of the electric accompanied by heat system, to measure the temperature of the tube and the design temperature of the same electric accompanied by tropical power output; and check the electric accompanied by tropical area whether there is damage can be caused by local failure.
　　             The electric accompanies the tropical power supply voltage insufficiently causes:
　　             Solution: Ensure that the voltage of the electric heat tracing system is enough, if necessary, separate distribution of power supply power point.
　　             In the electric accompanies the heat system to carry on the reasonable investigation after the failure, and in accordance with the relevant specification processing, in order to guarantee the accompanies the heat system to follow the long-term normal use, avoid the failure to form again.