Insulation materials used in chlor-alkali plants

Using a sponge is quite good. Just joking. The insulation of caustic soda plants is divided into heat retention and heat isolation. Heat retention can be further categorized into high-temperature and low-temperature conditions; I use a temperature of 100 degrees Celsius as the boundary between these two categories, and different insulation materials are used accordingly. For heat insulation and maintaining low temperatures, polyurethane foam insulation is the preferred choice, followed by polystyrene foam insulation. Rock wool can be used for low-temperature and high-temperature insulation, but it cannot be used for cold insulation, as the moisture absorption effect at low temperatures renders its insulating properties ineffective. For high-temperature insulation in applications such as steam pipes, polyurethane foam and polystyrene foam cannot be used, as their melting temperatures do not meet the required standards. Regardless of the insulation material used, it is very important that the external protective layer be airtight and waterproof.

What material should be used for insulating steam pipes? Can composite alumina be used?

The thermal insulation coefficient of rock wool is relatively low; it must be selected in accordance with technical requirements

I was about to upload a guideline when I found that the forum already had one. This standard sets certain specification requirements regarding the temperature resistance of some insulation materials. Unlike this standard, rigid polyurethane foam can withstand temperatures of up to 100 degrees, while the standard only specifies 70 degrees. http://bbs.hcbbs.com/viewthread.php?tid=571196&extra=