Heating issue for outdoor magnetic flap level transmitters in Xinjiang projects
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I would like to ask those of you who have worked on projects in Xinjiang for advice. We currently have a project there, and we are considering using magnetic flap level transmitters for the outdoor tanks. Do we need to install some form of heating? Given that temperatures in Xinjiang can drop below minus 20 degrees, should we use electric heating or steam heating? Since the magnetic flaps are lined with PTFE to prevent corrosion, will high-temperature steam damage this PTFE lining? As for electric heating, how effective would it be? The explosion protection rating required is D2BT4. I hope those with experience can offer their guidance.
What kind of medium? If the temperature can drop below the freezing point, then heating is necessary; the type of heating medium depends on the specific conditions on site. I can tell you that electric heating works quite well. Of course, you get what you pay for. As for high-temperature steam, you should specify the heating medium or the design temperature when purchasing a level gauge. If the design temperature is set low, then electric heating is a good option. However, electric heating can also cause the temperature to become too high, so there are various temperature control solutions available – it’s best to consider all factors carefully
The media consists of one type that is 10%-30% waste hydrochloric acid, and the other type is wastewater
With electric heat tracing, temperature control is possible, but due to the issue of temperature sensing points, control can only be done based on the temperature at those points; therefore, attention should be paid to the location where these sensing points are placed
What is used for heat tracing of other devices in the plant? If it’s electricity, use electricity; if it’s steam, use steam—low-pressure steam, around 160–180 degrees. There’s no problem with your PTFE.
Neither electric heating nor steam heating poses any problems; simply choose the appropriate one based on the conditions on site.
Tetrafluorine can withstand temperatures up to 400 degrees; it depends on your steam conditions, but generally there should be no problem. Using electricity in hazardous areas is risky: lol
1. In places like Xinjiang, jacketed heating should be considered during design and procurement; water heating will suffice； 2. If the originally purchased unit does not have a jacket and is equipped with a hot water system, it is best to use hot water, as it has a high heat capacity, facilitates good circulation of water, and can maintain the required temperature ； You can consult the manufacturer regarding the use of steam, or using a shorter length of heat tracing pipe along with some isolation measures should work fine ； 3. Electric heating elements – fast to install; they require a power supply and temperature control, or self-regulating electric heating elements can be used for applications that do not require strong heating ； However, the failure rate increases after 3-5 years, so long-term, hot water heating is better.
Could the use of hot water heating be considered?
The softening temperature is only around 100 degrees
This is related to the medium used; if the medium does not require heating, then there is no need to consider heating