Regarding the issue of insulation for high-pressure steam
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The high-pressure steam in our facility has a pressure of 9.8 MPa and a temperature of 540°C. The current insulation material used is aluminum silicate; are there any materials that offer better insulation properties? Our insulation thickness is 200 mm. I would like to ask: under normal conditions, what should be the temperature difference between the surface of the aluminum sheet and the atmosphere? Currently, the temperature difference in Devon is around 40°C, with some areas having a difference as high as 60°C.
Steam heating networks require specialized aluminum foil and fiberglass cloth resistant to ultra-high, high, and medium temperatures to be used for \"layered\" wrapping, with aluminum foil and fiberglass cloth combined with a bubble reflective layer and colored steel plates. Under normal conditions, the temperature on the surface of the color-coated steel sheet is equal to the atmospheric temperature; otherwise, heat loss and temperature drops will be significant, resulting in increased costs.
Under normal conditions, the temperature of the aluminum sheet surface should differ from the atmospheric temperature by no more than 3°C.
The temperature difference is too large; the thickness isn’t sufficient! Thicken the insulation further!
This is an excellent method for insulation. At present, we use this approach not only for steam pipelines but also for the insulation of process pipelines, which ensures a tight seal without any hot spots； The interior is made of composite silicate plates or tubes to resist high temperatures; glass fiber cloth is wrapped in the middle, and an aluminum silicate fiber blanket is used on the outer layer, ensuring a very low thermal conductivity and thus maintaining a low surface temperature ； **The insulation thickness has been reduced without an increase in cost.
The outer steam pipe is hot; if its temperature is high, it can easily cause burns. People who collect scrap, those who cultivate land in unused areas, or children playing there may all suffer accidents, so special attention must be paid.
The insulation thickness must comply with the design requirements; it cannot be increased indiscriminately, as this will affect the installation and use of pipeline accessories.
Where did the 3° come from? The surface temperature of the general insulation layer is around 50°.
Around 50°? Heat retention is divided into heat preservation and cold preservation
Surface temperature 50°? ? The heat from the steam probably turns into hot water after just a few kilometers.