What is the actual difference in insulation performance for pipes between jacketed and unjacketed types?
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With a steam pressure below 0.7 Mpa, the pipelines in most factories are insulated using ordinary rock wool combined with aluminum foil. Currently, jacketed tubes (also known as tube-in-tube systems) are available on the market; they are claimed to offer significant energy-saving benefits for those who use steam. When customers install flow meters, these systems’ manufacturers claim that the flow meters are inaccurate and suggest that customers measure the amount of coal burned instead. I found a post on a forum that said this insulation technique using jacketed pipes is mainly used in the north, where temperatures are low, to prevent the medium from sticking to the pipes and valves. It doesn’t seem necessary to apply this technology to steam pipes. Is there any expert familiar with this technology who can explain it?
Forgot to add: there is air between the inner tube and the middle tube; the manufacturer says that air provides the best insulation effect.
The insulation used by my agent here is in the form of tubes wrapped around other tubes; neoprene is used as the material inside, and the result is quite good. The outside surface is at room temperature. However, the cost is quite high – over 300 per meter
I searched on Baidu for NBR rubber, and the information showed that it has good oil resistance and is mainly used for oil seals. It has little to do with heat retention. Furthermore, under low-pressure operating conditions, the insulation performance of this technology is not commensurate with the cost involved; in my opinion, there is no need for it.
This isn’t necessary; our factory uses ordinary aluminum silicate. To achieve good insulation, it’s sufficient to make it thicker or add aluminum foil for waterproofing. The cost of the casing is high.
Well, I think so too.