چکيده

  Background and aims

  Fire and explosion hazards are the first and second of major hazards in process industries, respectively. This study has been done to determine fire and explosion risk severity,radius of exposure and estimating of most probable loss.

  Methods

In this quantitative study process unit has been selected with affecting parameters on fire and explosion risk. Then, it was analyzed by DOW's fire and explosion index (F&EI). Technical data were obtained from process documents and reports, fire and explosion guideline.After calculating of DOW's index, radius of exposure determined and finally most probable loss was estimated.

  Results

The results showed an F&EI value of 226 for this process unit.The F&EI was extremely high and unacceptable.Risk severity was categorized in sever class.Radius of exposure and damage factor were calculated 57 meters and 83%,respectively. As well as most probable loss was estimated about 6.7 million dollars.

  Conclusion

F&EI is a proper technique for risk assessment and loss estimation of fire and explosion in process industries.Also,It is an important index for detecting high risk and low risk areas in an industry. At this technique, all of factors affecting on fire and explosion risk was showed as index that is a base for judgement risk class. Finally, estimated losses could be used as a base of fire and explosion insurance.