According to equipment and general rule of technology of conduit heat preservation, heat insulating materials is to point to be equal to in average temperature or be less than 623K (350 ℃ ) when, thermal conductance is less than the material of 0.14W/(m · K) . Heat insulating materials is had normally qualitative the characteristic with light, loose, poriferous, small thermal conductance. Use commonly prevent heating power equipment and be lost of conduit quantity of heat, perhaps be in refrigerant (also say general is cold) with microtherm (also say deep cold) next use, call heat preservation again in our country heat insulating materials consequently or keep cold data. In the meantime, as a result of heat insulating materials poriferous or fiber shape structure has good sound absorption function, also be used extensively at building an industry consequently.
Heat preservation brick
Adiabatic insulation material has the function index that be as follows.
(1) thermal conductance
As heat insulation kind material, thermal conductance should Yue Xiaoyue is good, should choose thermal conductance to be less than 0.14W/(m · K) commonly, as protect cold heat insulating materials, taller to the requirement of thermal conductance.
(2) unit weight
The unit weight of heat insulating materials is average should under 600kg/m. The material with little unit weight, general thermal conductance is small also, but at the same time mechanical intensity also is reduced subsequently, reason wants reasonable alternative.
(3) mechanical intensity
Outside wanting to make heat insulating materials is reached in oneself weight, strength effect leaves changeless form and damage, its compressive strength should not be less than 3kg/cm.
(4) bibulous rate
After heat insulating materials is bibulous not only can reduce adiabatic performance greatly, and meet those who quicken pair of metals corrode, it is very harmful. Accordingly, want to choose the heat insulating materials with bibulous minor rate.
(5) hear resistance and use temperature
The temperature case that wants a basis to use a room chooses the heat insulating materials of different heat-resisting function. "High use temperature " the basis that is hear resistance of heat insulating materials.
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