About Fire and Explosion Hazard Indicators


Annotation:

Fire and explosion hazard indices are widely used in the normative-technical and practical activity for ensuring fire and explosion safety of the technological processes, storage and transportation conditions of substances,  materials and products, as well as when conducting fire-technical expertise and research. Based on the concepts «fire hazard index», «fire hazard», «fire and explosion hazard of substances and materials», the definition of fire and explosion hazard is proposed. This index is understood as a quantitative measure characterizing any property of fire and explosion hazard contained in a substance, process or condition and defined in specifications. Some uncertainties and stereotypes associated with inflammability of combustible substance or material are considered in practical examples. It is shown that the normative boundaries between the inflammability and noncombustibility or the groups of combustibility of substances and materials are not permanent and constant, as evidenced by various approaches thereto during different time periods. This fact testifies the relative relationship between them and the physical nature of the combustible substance or material. On the example of polystyrene plates it is shown how the multifacetedness of the term «flammability» became the cause of a wrong conclusion on their ignitibility. It is shown that imperfection of the methodology of the results assessment procedure of GOST 30244—94 allows to refer some combustible materials to the group of noncombustible materials. It is noted that the various normative methodologies on forecasting parameters of explosion for fuel-air mixtures are poorly coordinated between themselves. So, the use of fire and explosion hazard indices in the investigation of accidents and incidents related to fires and explosions, without prior verification of their suitability for a particular case, may not facilitate  establishing the true cause of the occurred fire or explosion and the forming efficient preventive means for prevention of similar accidents and incidents in the future.

References:
  1. GOST 12.1.033—81. Оccupational safety standards system.  Fire safety. Terms and definitions (with Amendment № 1). Available at:  http://docs.cntd.ru/document/1200003841 (accessed: March 15, 2020). (In Russ.).
  2. GOST 12.1.044—89 (ISO 4589—84). Оccupational safety standards system. Fire and explosion hazard of substances and materials. Nomenclature of indices and methods of their determination (with Amendment № 1). Available at:  http://docs.cntd.ru/document/1200004802 (accessed: March 15, 2020). (In Russ.).
  3. GOST 12.1.044—2018. Occupational safety standards system. Fire and explosion hazard of substances and materials. Nomenclature of indices and methods of their determination. Available at:  http://docs.cntd.ru/document/1200160696 (accessed: March 15, 2020). (In Russ.).
  4. OST 78-2—73. Combustion and fire hazard of substances. Terminology. Available at:  http://firenotes.ru/x_ost/ost-78-2-73/ost-78-2-73_a.html (accessed: March 15, 2020). (In Russ.).
  5. Technical regulation on fire safety requirements: Federal Law of July 22, 2008 № 123-FZ (as amended on December 27, 2018). Available at:  http://www.consultant.ru/document/cons_doc_LAW_78699/ (accessed: March 15, 2020). (In Russ.).
  6. GOST 30244—94. Building materials. Methods for combustibility tests. Available at:  http://docs.cntd.ru/document/9056051 (accessed: March 15, 2020). (In Russ.).
  7. GOST R 57270—2016. Building materials. Methods for combustibility tests. Available at: http://docs.cntd.ru/document/1200141743 (accessed: March 15, 2020). (In Russ.).
  8. Monakhov V.T. Research methods for substances fire hazard. Moscow: Khimiya, 1979. 424 p. (In Russ.).
  9. Drysdale D. An Introduction to Fire Dynamics. 3rd ed. New York: John Wiley & Sons, 2011. 574 p.
  10. Daéid N.N. Fire Investigation. Boca Raton: CRC Press LLC, 2004. 246 p.
  11. Chandler R.K. Fire Investigation. Clifton Park: Delmar Cengage Learning, 2009. 560 p.
  12. NFPA 921:2017. Guide for Fire and Explosion Investigations. Quincy: NFPA, 2016. 433 p.
  13. Ma T. Ignitability and Explosibility of Gases and Vapors. New York: Springer Science+Business Media, 2015. 230 p.
  14. ASTM E136—16a. Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 °C. West Conshohocken: ASTM International, 2016. 12 p.
  15. Alekseev S. Indicators determination of building materials fire hazard. Pozharnoe delo = Fire fighting. 2002. № 11. pp. 34–36. (In Russ.).
  16. Alexeev S., Smirnov V., Barbin N., Alexeeva D. Evolution of the classification of flammable and combustible liquids in Russia. Process Safety Progress. 2018. Vol. 37. № 2. pp. 230–236. DOI: 10.1002/prs.11949
  17. GOST 30402—96. BUILDING MATERIALS
  18. Ignitability Test Method. Available at:  http://docs.cntd.ru/document/1200000428 (accessed: March 15, 2020). (In Russ.).
  19. Cheshko I.D., Bukin A.S. On the ability of heat-insulating materials to smoldering. Rassledovanie pozharov: sb. st. (Fire investigation: collected papers). Saint-Petersburg: SPbU GPS MChS Rossii, 2014. Iss. 4. pp. 26–29. (In Russ.).
  20. R134a Refrigeration Technician Handbook (Version 3). Available at: https://www.iicl.org/iiclforms/assets/File/public/bulletins/ConGlobal_reefer_tech_handbook_3.pdf (accessed: March 15, 2020). (In Russ.).
  21. Kent J.A. Kent and Riegel’s Handbook of Industrial Chemistry and Biotechnology. New York: Springer Science+Business Media, LLC, 2007. pp. 108.
  22. Iskhakov X.I., Pakhomov A.V., Kaminskiy Ya.N. Car fire safety. Moscow: Transport, 1987. 87 p. (In Russ.).
  23. CAS REGISTRY — The gold standard for chemical substance information. Available at:  https://www.cas.org/support/documentation/chemical-substances (accessed: March 15, 2020).
  24. Alekseev S.G., Bessonov D.V., Smirnov V.V., Barbin N.M. Contingencies during testing in accordance with GOST 12.1.044. Yuzhno-Sibirskiy nauchnyy vestnik = South-Siberian scientific bulletin. 2019. № 3 (27). pp. 79–84. (In Russ.).
  25. Alekseev S.G., Avdeev A.S., Litvinov V.N., Gracheva N.N., Rudenko N.B., Orishchenko I.V., Barbin N.M. Comparative analysis of forecasting methods using real explosions as examples. Pozharovzryvobezopasnost = Fire and Explosion Safety. 2016. Vol. 5. № 7. pp. 16–26. (In Russ.). DOI: 10.18322/PVB.2016.25.07.16-26
DOI: 10.24000/0409-2961-2020-6-40-45
Year: 2020
Issue num: June
Keywords : fire and explosion hazard flash point combustibility ignition temperature auto-ignition temperature blast pressure
Authors:
  • Alexeev S.G.
    Alexeev S.G.
    Cand. Sci. (Chem.), Assoc. Prof., Scientific Consultant, 3608113@mail.ru Ural Research Institute of the All-Russian Voluntary Fire Society, Ekaterinburg, Russia
  • Gurev E.S.
    Gurev E.S.
    Scientific Secretary SEC «RAS LSM» UB RAS, Ekaterinburg, Russia Cand. Sci. (Eng.) ISA UrFU, Ekaterinburg, Russia
  • Poluyan L.V.
    Poluyan L.V.
    Director SEC «RAS LSM» UB RAS, Ekaterinburg, Russia Cand. Sci. (Eng.) ISA UrFU, Ekaterinburg, Russia
  • Barbin N.M.
    Barbin N.M.
    Dr. Sci. (Eng.), Assoc. Prof., Lead Researcher Ural Institute of the State Fire Service of EMERCOM of Russia, Ekaterinburg, Russia