What are the high temperature resistant insulation materials at 400?
According to the general rules of equipment and piping insulation, heat insulation material is a material with a thermal conductivity of less than 0.14W/ (m*K) when the average temperature is equal to or less than 623K (350 degrees Celsius). Heat insulation material is usually light, porous, porous, small thermal conductivity characteristics. Generally used to prevent heat loss of equipment and pipes, or frozen (also known as general cold) and low temperature (also known as cryogenic) use, so in our country, insulation materials, also known as insulation or cold preservation materials. At the same time, because of the porous and fibrous structure of thermal insulation material, it has good sound absorption function, so it is also widely used in the construction industry.
Thermal insulation materials for thermal equipment and pipes are mostly inorganic insulation materials. This kind of material has the characteristics of no decay, no burning, high temperature resistance and so on. For example: asbestos, diatomite, perlite, glass fiber, foam glass concrete, calcium silicate and so on.
Foam heat insulation material mainly includes two categories: polymer foam type insulation material and foam asbestos insulation material. Polymer foam heat insulation material has the advantages of small absorption rate, stable heat preservation effect, low thermal conductivity, no dust flying in construction, easy construction, and so on. It is in the period of popularization and application. Foam asbestos thermal insulation material has the characteristics of small density, good thermal insulation and convenient construction, and its popularization and development is relatively stable, and the application effect is better. But at the same time there are some defects: for example, foam cotton is easy to damp, immersed in water easily dissolved, elastic recovery coefficient is small, can not contact the flame and in the wall pipe parts use.
