Currently in the world there are many hazard analysis methods Scientists have synthesized and classified about 62 hazard analysis methods, used to evaluate the hazards that may occur in industrial plants. But to evaluate hazards in the activities of chemical plants, according to experts can not just use one method in 62 hazard analysis methods, that need to combine methods with each other. In fact, there is not any typical hazard assessment process in the chemical industry. A new factory, a process unit... has its own unique characteristics. To evaluate the hazards of it, analysts often have to build specific evaluations steps for each plant based on their knowledge about the hazards evaluation methods, the process unit evaluated. In this paper, we refer to the Building chemical fire-risk hazards assessments steps, the next part the result of subject codes 209 - 15/ TLD.