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Tank Training Presentation Transcript

  • 1. Foam Team Training Series “ Storage Tanks”
  • 2. Introduction
    • This training series has been designed to look at the basics of Foam firefighting and incorporate what a new firefighter to our Foam team would need to know.
    • These sessions while basic for the Foam Firefighter are not commonly known facts to any structural firefighter.
  • 3. Contact Info
    • Should you need any further information on Foam firefighting or have any further comments on these programs please contact the training programs officer on our contacts webpage.
  • 4. Storage Tanks
    • There EPA recognizes six primary types of storage vessels often found in industrial settings.
    • They are:
      • Fixed roof
      • External floating roof
      • Domed external floating roof
      • Internal floating roof
      • Variable vapor space
      • Pressure
  • 5. Fixed Roof
  • 6. Fixed Roof
    • A normal fixed roof storage tank has a cylindrical steel shell with a fixed roof utilizing a frangible roof seam
    • The roof may be any shape, but will usually be cone, domed, or flat
    • They will often have an open vent or some type of pressure/vacuum vent to control vapor emissions
  • 7. Fixed Roof
    • Fixed roof designs are the cheapest to build and is considered to be the minimum requirements for storing organic liquids.
    • Usually constructed of steel, steel/fiberglass, or fiberglass/polyester
    • They usually contain 40,000 gallons or less of product
  • 8. External Floating Roof
  • 9. External Floating Roof
    • This tank is usually an open topped cylindrical steel shell with a roof that floats on the surface of the stored liquid
    • The floating roof rises and falls with the level of the liquid contained in the tank keeping vapors to a minimum
    • The floating deck can float directly on the fluid (contact deck) or float just above (non-contact deck)
  • 10. External Floating Deck
    • Non-contact decks are the most commonly found
    • They can be problematic due to water and snow accumulation formed on the deck and must be drained regularly to prevent the deck from sinking into the product
    • They can be identified by the absence of a roof and roof vents
  • 11. Domed External Floating Roof
  • 12. Domed External Floating Tank
    • These tanks have both the “internal” floating deck combined with a domed roof
    • This combination often comes from a retrofit of the older external floating tank being fitted with a dome
    • The deck itself helps to keep vapors down, and the dome helps to prevent wind, rain, and snow from impacting the deck
    • This tank can be identified by the dome and the presence of roof vents
  • 13. Variable Vapor Space Tanks
    • These tanks are equipped with expandable vapor reservoirs to accommodate vapor volume fluctuations from temperature and barometric changes.
    • While they can be used independently they are often connected with other tanks sharing the vapor spaces
  • 14. Variable Vapor Space Tanks
    • There are two types of these tanks
      • Lifter roof tanks – telescoping roofs that fit around the outside of the main tank wall and is closed by a wet seal or a dry seal
      • Flexible diaphragm tanks – use flexible membranes to provide the expandable volume
  • 15. Pressure Tanks
    • There are two types of pressure tanks being used:
      • Low pressure (2.5 to 15 psig)
      • High pressure (>15psig)
    • Pressure tanks are used to store organic liquids and gases with high vapor pressures.
  • 16. Pressure Tanks
    • They are equipped with a pressure/vacuum vent to helps to prevent loss from breathing and boiling loss from temperature and barometric changes
  • 17. Conclusion
    • It is imperative that you as a firefighter get out to your jurisdiction to identify exactly what types of tanks you are dealing with
    • Most plant managers welcome the opportunity to bring in the fire department for education on their equipment
  • 18. Credits
    • Photo credits to landandmarine.com
    • Tank information credit to epa.gov