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NFPA 85: Boiler and Combustion Systems Hazards Code, 2023
- Chapter 1 Administration [Go to Page]
- 1.1 Scope.
- 1.2 Purpose.
- 1.3 Application.
- 1.4 Retroactivity.
- 1.5 Equivalency.
- 1.6 Enforcement.
- Chapter 2 Referenced Publications [Go to Page]
- 2.1 General.
- 2.2 NFPA Publications.
- 2.3 Other Publications.
- 2.4 References for Extracts in Mandatory Sections.
- Chapter 3 Definitions [Go to Page]
- 3.1 General.
- 3.2 NFPA Official Definitions.
- 3.3 General Definitions.
- Chapter 4 Fundamentals [Go to Page]
- 4.1 Manufacture, Design, and Engineering.
- 4.2 Installation and Commissioning.
- 4.3 Coordination of Design, Construction, and Operation.
- 4.4 Maintenance, Inspection, Training, and Safety.
- 4.5 Basic Operating Requirements.
- 4.6 Structural Design.
- 4.7 Functional Requirements of Fuel-Burning System.
- 4.8 Multiple Boilers or HRSGs.
- 4.9 Gaseous Vent System Requirements.
- 4.10 Fuel System Piping.
- 4.11 Burner Management System Logic.
- 4.12 Flame Monitoring and Tripping Systems.
- 4.13 Combustion Control System.
- 4.14 Power Supplies.
- 4.15 Operating Information.
- 4.16 Selective Catalytic Reduction.
- 4.17 Noncombustible Material.
- Chapter 5 Single Burner Boilers [Go to Page]
- 5.1 Application.
- 5.2 Purpose.
- 5.3 Unattended Operation.
- 5.4 Equipment Requirements.
- 5.5 Starting of a Cold Boiler.
- 5.6 Burner Management Systems.
- 5.7 Simultaneous Firing of Oil and Gas Fuels.
- 5.8 Simultaneous Firing of Oil and Gas for Fuel Transfer Only.
- 5.9 Dual Oil Atomizers in a Single Burner.
- Chapter 6 Multiple Burner Boilers [Go to Page]
- 6.1 Application.
- 6.2 Purpose.
- 6.3 Mechanical Equipment Requirements.
- 6.4 Burner Management and Combustion Control Requirements.
- 6.5 Furnace Implosion Protection.
- 6.6 Fuel Gas Systems.
- 6.7 Fuel Oil Systems.
- 6.8 Pulverized Coal Systems.
- 6.9 Selective Catalytic Reduction (SCR) Systems with Bypass Capability.
- Chapter 7 Atmospheric Fluidized Bed Boilers [Go to Page]
- 7.1 Application.
- 7.2 Purpose.
- 7.3 General.
- 7.4 Equipment Requirements.
- 7.5 Furnace Pressure Excursion Prevention.
- 7.6 Sequence of Operations.
- 7.7 Sequence of Operations for Gas-Fired Warm-Up Burners.
- 7.8 Sequence of Operations for Oil-Fired Warm-Up Burners.
- 7.9 Interlocks.
- 7.10 Alarm System.
- Chapter 8 Heat Recovery Steam Generators and Other Combustion Turbine Exhaust Systems [Go to Page]
- 8.1 Application.
- 8.2 Purpose.
- 8.3 Project Coordination.
- 8.4 Equipment.
- 8.5 HRSG Enclosure and Other Combustion Turbine Exhaust Systems.
- 8.6 Electrical.
- 8.7 Controls, Monitoring, Alarms, and Interlocks.
- 8.8 Purge, Start-up, Operation, and Shutdown of HRSG and Other Combustion Turbine Exhaust Systems.
- 8.9 Combustion Turbine Exhaust Bypass Systems.
- 8.10 Combustion Turbine and HRSG with Fresh Air Firing Capability.
- 8.11 Combustion Turbine Exhaust System.
- Chapter 9 Pulverized Fuel Systems [Go to Page]
- 9.1 Application.
- 9.2 Purpose.
- 9.3 General.
- 9.4 Direct-Fired Pulverized Fuel Systems.
- 9.5 Indirect-Fired Pulverized Fuel Systems.
- 9.6 Operation.
- 9.7 Special Systems.
- Chapter 10 Stokers [Go to Page]
- 10.1 Purpose.
- 10.2 Fuel-Burning System.
- 10.3 Combustion Control System.
- 10.4 Operation.
- 10.5 Furnace Inspection.
- 10.6 On-Line Maintenance.
- 10.7 Access Doors or Observation Ports.
- 10.8 Ash Hopper Access Doors.
- 10.9 Ash Handling.
- Annex A Explanatory Material
- Annex B Concentrated Flame Igniter Supplemental Information
- Annex C Multiple Burner Boiler Low NOx Operation — Special Considerations
- Annex D Fluidized Bed Boilers Supplemental Information
- Annex E Common Pulverized Fuel System Designs
- Annex F Supplemental Information on Stoker-Fired Boilers
- Annex G Sample Ordinance Adopting NFPA 85
- Annex H Safety
- Annex I Fuel Hazards
- Annex J Origin and Development of NFPA 85
- Annex K Informational References [Go to Page]