The port in the modern transportation occupies the very important role, is the water and land transportation assembly point and the hub, the industrial and agricultural products and the foreign trade import and export material distribution place, the ship berths, the loading and unloading cargo, the up and down passenger, the supplementary feeding place. But because of the environment where the port is located, its equipment pipeline in low temperature is easy to freeze condensation phenomenon, need to carry on the electricity heating cable, to ensure the normal operation of the goods transportation.

 　　Port terminal is in order to ensure that the goods in the low temperature can also be normal transportation, for its pipeline equipment to choose insulation, its pipeline is more, and inside the medium is also more special, there are heavy oil pipeline, crude oil pipeline, fuel oil pipeline, liquid alkali pipeline, etc., which is also very important to the fire pipeline, according to the actual situation of the port, you can choose to use a series of constant power electric heating cable products for thermal insulation and accompanied by the heat.

 　　                  The reason for choosing to use series constant power electric heating tracing cable is that its accompanying heat power is stable, the use of distance is relatively long, and the port terminal pipeline heat preservation is the need to stabilize the accompanying heat, there is also the pipeline distance is relatively long, and series constant power electric accompanying heat tape characteristics in line with.

 　　                    The series connection constant power electric heating cable is a kind of electric heat product which by the core wire heat generator, namely passes the electric current on the core wire which has the certain resistance, the core wire sends out the Joule heat, due to the core wire unit length resistance and passes the electric current in the whole length is equal, therefore its each place's heat generating quantity is also equal, will not be because of using the length of the increase and causes the power of the tail end to be low, is especially suitable for the long-distance pipe line accompanies the heat preservation.