In a broad definition, natural gas refers to all gases naturally occurring in nature, including gases formed by various natural processes in the atmosphere, hydrosphere, and lithosphere. The definition of "natural gas" that has been commonly used for a long time is a narrow definition from the perspective of energy, which refers to a mixture of hydrocarbons and non-hydrocarbon gases naturally stored in the formation.

        Due to the cold climate in Jilin, the natural gas pipeline will be exposed to icing in winter, which not only affects the pipeline's transmission capacity, but also poses great safety risks. The natural gas pipeline itself does not have the ability to generate heat. Simple thermal insulation cotton cannot solve the above problems. Therefore, to solve the freezing of the natural gas pipeline, the pipeline must be insulated with electric heat.

According to the environmental and temperature requirements of the natural gas pipeline, a self-limiting temperature electric heating cable is selected, which uses electricity as a heat source to supplement the heat lost by the heating body in the process, and has the characteristics of high thermal efficiency, energy saving and environmental protection. It can automatically adjust the output power and the temperature of the heating with the temperature change of the object to be heated, and it can also be cut arbitrarily or used for lengthening within the range.

At present, the self-limiting temperature electric heating cable has been widely used in the pipeline, pump body, valve, tank and tank volume of the petroleum, chemical, electric power, medicine, machinery, food, ship and other industries for heat tracing, heat preservation, antifreeze and anticondensation. It is an advanced and efficient method for maintaining the process temperature of liquid pipelines and liquid storage medium tanks.