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Fire hazard of oil by Sougata Pal

Sougata Pal
Sougata Pal

The document discusses theoretical analysis of fire hazards from oil. It identifies potential fire sources from oil leakage and outlines a process to: 1) Identify and classify potential leakage sources and fire system characteristics. This is based on statistical data of past oil fire occurrences. 2) Develop a fire event tree to model the sequence of events from a leakage to a fire being detected and extinguished, or not. 3) Calculate the frequency of oil leakages based on the probability of damages occurring in system elements that could cause leaks.

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Oil Fire Hazards Elimination of By Sougata Pal BOE, NPTI, MBA in Operation Power plant Professional
1. Introduction In order to prevent fires, we may draw up new requirements, which need to be verified with a theoretical method of analysis of fire hazard of oil. 2. Preliminary assumptions Fire hazard theoretical analysis concerns fires caused by self-ignition of flammable liquids oil. It involves the following issues: Identification and classification of potential fire sources (liquid leakage and ignition), Adoption of fire occurrence Calculations of relative frequencies (probability) of various types of fires. Fire hazard of oil
3. Identification and classification of fire sources Fire sources identification involves selection of definite number of system elements, the damages of which may result in flammable liquid leakage and self-ignition. Such elements as, pipelines joints and sections, valves and system equipment, are taken into consideration. The following constitute systems (of machines) that may contain potential leakage sources: supply pumps, filters and fuel oil and oil centrifuges, waste oil management. Characteristics of fire protection system. Identification of fire sources is based on statistical data concerning real fires, i.e. frequency and causes of their occurrence. Fire hazard of oil
4. Adoption of a fire event tree To adopt a fire event tree, the following original scenario (sequence of events is assumed: 1. leakage of flammable liquid, 2. flammable mixture and ignition source interaction, 3. fire break out (ignition), 4. fire detection (detector activation), 5. preliminary firefighting (without cutting off liquid supply), 6. power cut-off, 7. full scale firefighting (use of fixed fire-extinguishing system). Depending on which possibility of an event has been chosen (yes or no), the original sequence is expanded as secondary events branches, the time limit of which is a fire of various scales (or no fire). Fire hazard of oil
5. Frequency of flammable liquids leakages Frequency of flammable liquid leakages in vessel installations is determined on the basis of probability of damages occurrence in elements which constitute a potential leakage source. Other Aspects 6. Probability of sprayed liquid interaction with an ignition source 7. Probability of ignition 8. Probability of fire detection 9. Probability of fire extinguishment Fire hazard of oil
Fire hazard of oil
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Fire hazard of oil by Sougata Pal

  • 1. Oil Fire Hazards Elimination of By Sougata Pal BOE, NPTI, MBA in Operation Power plant Professional
  • 2. 1. Introduction In order to prevent fires, we may draw up new requirements, which need to be verified with a theoretical method of analysis of fire hazard of oil. 2. Preliminary assumptions Fire hazard theoretical analysis concerns fires caused by self-ignition of flammable liquids oil. It involves the following issues: Identification and classification of potential fire sources (liquid leakage and ignition), Adoption of fire occurrence Calculations of relative frequencies (probability) of various types of fires. Fire hazard of oil
  • 3. 3. Identification and classification of fire sources Fire sources identification involves selection of definite number of system elements, the damages of which may result in flammable liquid leakage and self-ignition. Such elements as, pipelines joints and sections, valves and system equipment, are taken into consideration. The following constitute systems (of machines) that may contain potential leakage sources: supply pumps, filters and fuel oil and oil centrifuges, waste oil management. Characteristics of fire protection system. Identification of fire sources is based on statistical data concerning real fires, i.e. frequency and causes of their occurrence. Fire hazard of oil
  • 4. 4. Adoption of a fire event tree To adopt a fire event tree, the following original scenario (sequence of events is assumed: 1. leakage of flammable liquid, 2. flammable mixture and ignition source interaction, 3. fire break out (ignition), 4. fire detection (detector activation), 5. preliminary firefighting (without cutting off liquid supply), 6. power cut-off, 7. full scale firefighting (use of fixed fire-extinguishing system). Depending on which possibility of an event has been chosen (yes or no), the original sequence is expanded as secondary events branches, the time limit of which is a fire of various scales (or no fire). Fire hazard of oil
  • 5. 5. Frequency of flammable liquids leakages Frequency of flammable liquid leakages in vessel installations is determined on the basis of probability of damages occurrence in elements which constitute a potential leakage source. Other Aspects 6. Probability of sprayed liquid interaction with an ignition source 7. Probability of ignition 8. Probability of fire detection 9. Probability of fire extinguishment Fire hazard of oil