Electrical heating installation precautions

Published on:

2022-10-07 10:16

Electric heating cable is a heating method that uses insulation resistance or resistance heating wire to create a temperature after power supply. It can automatically adjust the output temperature and reasonably maintain the process temperature requirements to keep the heat, temperature rise and freeze protection of the heating equipment. The insulation and antifreeze effect of the container is very good.

The temperature created by the electric heating is uniform, the temperature adjustment and control is accurate, the device is simple and convenient to maintain, it can realize remote control, remote control and automatic control, large surface contact with the heating equipment, and the heat transfer loss is small. The flatness and spatial limitations on the heater mounting surface are small, and it has a very large advantage when used in equipment requiring a heater, such as pumps, valves, flanges and oil storage tank samplers. The characteristics of uniform heating of electric heating make it possible to avoid the lack of uneven heating from the end to the end of the long heating pipe, which cannot be achieved by steam heating and hot water heating. During production and operation, there will be no phenomena such as work, leakage and leakage, such as heating steam and hot water, which can effectively reduce maintenance costs. At the same time, electric heating also has the advantages of clean production, saving water and energy, environmental protection, simple design and long service life.

Electric heating precautions

1. It is strictly forbidden to spin and clog the electric heating cable during construction and laying, and at the same time, excessive tension is not allowed to avoid damage to the insulation and short circuit of the electric heating cable. The surface of equipment and appliances, such as pipes and flanges that require electric heating, should be smooth and smooth, without sharp edges and corners, so as not to scratch or damage the electric heating cable during construction or further operation.

2. Parallel and straight winding is used for electric heating cable. Wave winding, spiral winding and other ways. When laying with wave noise and screw winding, the minimum bending radius should not be exceeded. Excessive folding and bending can lead to partial destruction and ignition due to a change in internal structure.

3. To carry out construction in strict accordance with the requirements of the installation project. According to the heat load required by the project, to ensure the reasonable length of the electric heating cable for the pipeline \ nExcessive gasket or too small gasket is not conducive to the rational use of electric heating and energy saving and reducing consumption.

4. In order to ensure uniform heat dissipation of the electric heating cable system, the electric heating cable must be tightly attached to the pipe surface, and pasted and fixed with aluminum foil or aluminum tape, which not only increases heat. Dissipation area, promotes thermal conductivity, and facilitates the installation and construction of heating cable.

5. When laying the insulation layer, insulating materials such as glass wool must remain dry. Wet insulation materials will seriously affect the insulation effect, and can also cause corrosion of the heating cable and shorten the service life of the heating cable. After laying the insulation material, it needs to be waterproofed. If the waterproofing layer is not wrapped, it will greatly affect the insulation effect and increase the power loss.

6. The installation length of the heating cable shall not exceed its maximum allowable length The maximum allowable length depends on the performance of different types of products.

7. After the electric heating system is installed, an electrical insulation test must be carried out. When checking, it is necessary to check the insulation of each wiring circuit alternately.

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