Users who buy electric heating cables want to buy cost-effective products, and expect to use them for a long time and minimize the frequency of replacement. However, due to the long running time of the electric heating cable, they are aging, or damaged by early design, installation defects and construction operations. The tropics account for a certain proportion, and it is normal to update the electric tracing cables that have exceeded the service life in batches.
The electric tracing cable adopts the three-layer co-extrusion technology, which is characterized by: two metal wires are sequentially covered with a low-resistance transition layer, a conductive layer, an insulating inner layer, a metal shielding mesh, and an insulating outer layer. The layer and the insulating inner layer are formed by three-layer co-extrusion at one time. The application of the three-layer co-extrusion technology makes the heating cable structure stable, low starting current, tightly wrapped without gaps, no impurities, edge performance, extended service life, attenuation resistance, convenience and safety, and extended long service life.
In order to reduce the proportion of damage to the heating cable caused by the outside world, the following issues should be paid attention to in the installation and maintenance of the heating cable:
1. Precautions for installation: Whether there is cross-wound electric heating cable, or the spacing is too dense (for constant power electric heating cable), which may cause overheating at the overlapping area and affect the service life of electric heating cable. In order to avoid this problem, the winding distance and method should be accurately calculated during design, and the most suitable electric heating cable model should be selected;
2. The later maintenance personnel should record the installation diagram and related test data, and archive them for later maintenance;
3. Attention should be paid to the safety and waterproofness of the entire electric heating system. After the electric heating cable is installed, a waterproof external insulation layer is required to ensure that the electric heating cable works in a dry environment;
4. Carry out regular maintenance on the electric heating cable, and carry out key inspections on the parts that are easily damaged. Generally, the elbow is the place where it is easier to damage the electric heating cable. You can start the test from here. In addition, the parts that are more likely to damage the electric heating cable are: the drain of the tank, the joint between the upper and lower tanks, the level gauge, the flange, and the inlet and outlet parts of the valve and the instrument box. These are the points that need attention and can be used as detection points.