It is applicable for conditions that continuous temperature is below 160 Centigrade, and instant temperature is below 200 Centigrade. Property of oxidation resistance is not good, but properties of acid resistance and alkali resistance are excellent. Allowed PH value range:1-14. Relative Humidity>30%. It is suitable for the dust collection of flue gas of coal fired boilers, garbage incineration , metal smelting, chemical industry, etc.