Liquid asphalt has high viscosity, high freezing point, and high resistance during transportation. In addition, the temperature sensitivity of asphalt is high, and its temperature needs to be controlled in a relatively stable range during the transportation process, and the temperature is too low, which will cause it to solidify and block the pipeline, and the pipeline cannot be transported; If the temperature is too high, not only will heat be wasted, but it may also cause the properties of the asphalt to change. Asphalt temperature: 135-150, density: 970kg m.
The viscosity of asphalt is greatly affected by temperature, and with the decrease of temperature, the viscosity of asphalt increases, and the resistance drop of asphalt in pipeline transportation increases. When the temperature drops below its freezing point, the asphalt will solidify, causing the pipeline to clog and cause problems for transportation. Therefore, heat tracing and insulation during asphalt transportation and conveying are very important. Electric heat tracing has been widely used as an effective pipe insulation measure, and its working principle is to use electric energy to directly act on industrial production, and supplement the heat loss of the heating pipeline through direct or indirect heat exchange, so as to achieve the purpose of temperature maintenance or temperature increase.
Reasons for choosing MI armor explosion-proof electric heat tracing:
Asphalt is corrosive, and armor explosion-proof electrical heat tracing used to maintain temperature needs to be corrosion-resistant.
Bitumen is a flammable substance, and the armored, explosion-proof electric heat traced used to maintain temperature has explosion-proof and flame-retardant properties.
By keeping the flow liquid state of the asphalt between 135 and 150 °C, the armoured explosion-proof electric heat trace can reach an operating temperature of 150°C or even higher.
The temperature of the pipeline transporting the asphalt is high. Therefore, the heating unit should have the requirements to operate normally in a higher exposure temperature environment.
The above four main selection conditions are all available for armored explosion-proof electric heat tracing, and the seamless stainless steel outer sheath, heating core and magnesium oxide are all resistant to high temperature and corrosion.