For a good risk analysis, it’s necessary to obtain input data, what means to identify the hazard. Based on the hazard identification, it is also possible to estimate the risk. Hazard identification is a process in which interested persons try to detect any hazards that may represent a source of risk. Hazard identification takes into account also factors such as physical, chemical, biological factors and factors of organizational character. For hazard identification can be used deductive method of observation and data collection, pre-prepared checklist, commonly used methods such as What-If; HAZOP, Dow’s Chemical Index, Dow’s Fire Explosion Index or some others.