Prevent fires, explosions, and implosions in heating equipment with the revised 2007 NFPA 85!

Complete with a time-saving chapter on common requirements for all boilers, NFPA 85 contains important provisions for boiler design, installation, operation, training, and maintenance. Updated for 2007, this comprehensive document applies to the full range of large boilers and systems, including:

• Large boilers, including atmospheric fluidized bed boilers with a minimum fuel input rating of 12.5 million Btu/hr (3.6 MW)
• Stoker operations
• Pulverized fuel systems
• Fired or unfired steam generators used to recover heat from combustion turbines.

• The specific requirements for furnace structural design have been removed from Chapter 4 and relocated as appropriate to the individual chapters.
• Requirements for flue gas path auxiliary systems have been added along with supporting annex material.
• The section previously titled "Programmable Logic Controllers" was merged into the design requirements for the logic system.
• New flame proving requirements have been added.
• Commissioning and installation requirements have been consolidated into a single section.
• The use of valve proving systems in fuel gas trains has been added.
• The scope of Chapter 6 has been clarified as applying from the forced draft fan inlets to the stack inlet.
• Requirements for flue gas path auxiliary systems specific to multiple burner boilers have been added.
• Purge requirements have been rewritten and consolidated.
• Furnace structural design requirements for multiple burner boilers have been added and now include the impact of booster fans. Implosion protection has been clarified as not being required on units that have no fan in the flue gas stream downstream of the boiler. In conjunction with these changes, a definition of booster fan has been added to Chapter 3.
• Requirements for fuel gas and fuel oil safety shutoff valves were added to Chapter 6.
• Requirements for lance and burner safety shutoff valves have been added to Chapter 7.
• Requirements for flue gas path auxiliary systems have been added.
• The scope of Chapter 8 has been expanded from heat recovery steam generators to include other combustion turbine exhaust systems that present similar fire and explosion hazards, including those with no heat recovery. A definition of combustion turbine exhaust systems has been added to Chapter 3, and other changes were made throughout the code as required for consistency.
• Additional combustion turbine interlocks have been added to ensure fuel gas in-leakage is not occurring during the combustion turbine purge and that excessive fuel is not being introduced during combustion turbine light-off.
• Specific requirements for heat recovery steam generator (HRSG) implosion protection have been added to Chapter 8.
• The fuels to which Chapter 9 applies have been revised.
• Transient design pressure requirements specific to stokers have been added to Chapter 10.
• An expanded scope includes all combustion turbine exhaust systems, not just heat recovery steam generators.
• New requirements for flue gas path auxiliary systems, including, but not limited to ammonia injection, sulfur burners, soot cleaning systems, and electrostatic precipitators.
• New furnace structural design requirements for multiple burner boilers now include the impact of booster fans.
• Requirements were added for fuel gas and fuel oil safety shutoff valves.