Used in the process of petrochemical production of raw materials, auxiliary materials, semi-finished products and finished products, such as crude oil, natural gas, gasoline, liquid hydrocarbon, ethylene, propylene, etc., the vast majority of flammable and combustible material, once leakage, easy to form an explosive mixture combustion and explosion;Many materials are high toxic and poisonous substances, such as benzene, toluene, sodium cyanide, hydrogen sulfide, chlorine, etc., these material handling or leakage, easy to cause casualties;Also used in the process of petrochemical production, produce a variety of strong corrosive acid, alkali, such as sulfuric acid, hydrochloric acid, caustic soda, equipment, pipeline corrosion problem of high possibility;Some material also has the spontaneous combustion, critical features, such as metal organic catalysts, vinyl, etc.