Heating tape issues

Electric heating tapes are widely used these days; it is recommended to choose products from reputable manufacturers. In China, the price of such tapes ranges from a little over ten yuan per meter to over a hundred yuan per meter. The quality of the outer insulation layer is the key factor here – high-quality tapes can last for more than ten years, while inferior ones need to be replaced after just two years, and replacing them incurs significant costs. Previously, electric heat tracing systems had all three phases combined, but now they are separated; this makes it easier to diagnose problems and repair them when they occur, although the cost is slightly higher.

I’m sorry; I only know that solar water heaters require electric heating tapes. But where are electric heating tapes needed in chemical equipment? Is it allowed from a safety perspective? Are there any **standards** in this regard? Are there any examples of the use of electric heating tapes in the chemical industry, and what is their effectiveness?

Electric heating is widely used; it is a good option in situations where steam is not available. Its effectiveness is closely related to the insulation of the pipeline equipped with electric heating elements. There are no safety issues; our PID diagram specifies the requirements clearly. I’m not too familiar with the standards.

Our factory uses electric heating for the polypropylene film recycling equipment; the main drawback is its short service life, so we later switched to steam heating.

The connection part of the electric heating tape must use special connectors, and it should be kept at a certain distance from other power cables.

Application environment, explosion protection rating, whether the medium is corrosive (this determines what material is needed for the outer sheath), the temperature of the medium that needs to be maintained, and the ambient temperature (this determines whether low, medium, or high temperatures are required). Heat loss needs to be calculated in order to determine the wattage of the strip that should be used, as well as the thickness of the insulation layer required (for specific selection purposes). Feel free to contact me directly; I represent the manufacturer

For self-temperature-regulating belts, there are only a few manufacturers in China that have production lines for them. In the past, the technology was unstable, which meant that their lifespan was much shorter compared to foreign products; before the year 2000, such products were not very mature. But things have improved now...

For solar applications, the simplest and cheapest types of belts are used… In many chemical processing systems, where temperatures need to be above room temperature, such belts are employed… The same applies to oil pipelines; for example, with substances like benzene, glacial acetic acid, and heavy oil, if the temperature drops below 20 degrees, these substances will precipitate, solidify, or form wax, preventing them from flowing. Safety considerations are certainly taken into account, with regulations regarding explosion-proof ratings and other aspects in place. **Standards are currently being drafted, and our factory is one of the organizations involved in this process… There are numerous examples of such applications… Abroad, steam and electric heating are used in equal proportions; in China, electric heating is used less often, but it has been in use since the 1980s. Especially after the year 2000, as domestic products became more mature, their use increased significantly… If you want to know more about specific applications, feel free to contact me… It’s clear that this method is cheaper than using steam, requires less energy, is easier to maintain, and is environmentally friendly, helping to reduce emissions

When steam is available, electric heating has a significantly greater advantage over steam heating. The initial investment is roughly the same, but the energy consumption is about 5 times lower... it’s much cheaper. Maintenance costs are also much lower... it’s simple and convenient too... hehe

Could you tell me exactly where it is used, in what environment, Vivian? I’m very interested.....

2 Selection of electric heat tracing tapes: In actual engineering projects, the choice of electric heat tracing tapes should be determined based on specific circumstances; it is not appropriate to choose either constant-power heat tracing tapes or self-regulating temperature heat tracing tapes uniformly. A comprehensive consideration from both technical and economic perspectives is necessary, and it is recommended to follow the selection principles outlined below. (1) In the oil-gas separation zone composed of the gas separation buffer tank and the natural gas separator, the surface oil pipelines, the sewage pipes of the oil-gas separation buffer tank, the natural gas separator, and the level gauges are concentrated in this area; strict temperature control is also required. Constant-power electric heating tapes can be used, with single-phase constant-power electric heating tapes for the level gauges and three-phase constant-power electric heating tapes for the others. This allows for unified control using one set of explosion-proof distribution boxes and temperature controllers, but the distribution boxes, junction boxes, and temperature controllers must meet explosion-proof requirements. (2) The water supply tanks and pipes are generally located away from explosion-proof areas; the heating elements are not concentrated there, and the temperature control requirements are not high – it is sufficient to keep the water temperature within a certain range to meet the design specifications. Therefore, by using a self-temperature-controlled electric heating tape, it is possible to eliminate electric heating accessories such as distribution boxes and temperature controllers. (3) In areas with many valve elbows, cross-over and overlapping installations may occur; therefore, constant-power electric heating tapes (with a separate electric heating wire layer) are not suitable, and self-temperature-controlled electric heating tapes are preferred. (4) From the perspectives of design and installation, constant-power electric heat tracing tapes are generally subject to limitations regarding the length of each section. If the appropriate section length is not determined during cutting, that portion of the heat tracing tape will not function, which not only affects the heating effect on the pipeline but also results in waste ； Moreover, self-regulating electric heating tapes can be cut as needed, ensuring the integrity of the electric heating system.

They all have dedicated power connection boxes, as well as 2-way or 3-way terminals... As for other power cables, I think heating tapes are applied to pipes or tanks, with insulation material applied on top of them; they don’t come into contact with other power cables at all, right? Hehe