NFPA 85: Boiler and Combustion Systems Hazards Code

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2011 NFPA 85
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Improve fire safety and system reliability with the 2011 NFPA 85: Boiler and Combustion Systems Hazards Code.

Updated for 2011, this comprehensive document applies to the full range of large boiler installations and pulverized fuel systems:

  • 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

Major changes for 2011 include:

  • New definition and rules for a Combustion Turbine Purge Credit enabling designers and operators to establish and maintain a "purged" condition for heat recovery steam generators between restarts
  • Streamlined requirements for continuous trend display for single burner boilers
  • Revised boiler requirements for purging the boiler enclosure where no fans remain in service
  • Expanded guidance on burner management system design describes the types of signals and transmitters used to initiate safety alarms and interlocks and appropriate monitoring methods
  • Added guidance regarding flue gas analyzers installed in the flue gas stream

Complete with a timesaving chapter on common requirements for all boilers, the 2011 NFPA 85 contains important provisions for boiler or combustion system designers, operators, and enforcers working with these systems. (Softbound, 235 pp., 2011)

NFPA® 85 Boiler and Combustion Systems Hazards Code 2011 Edition

Chapter 1 Administration
1.1 Scope.
1.2 Purpose
1.3 Application
1.4 Retroactivity
1.5 Equivalency
1.6 Enforcement
Chapter 2 Referenced Publications
2.1 General
2.2 NFPA Publications
2.3 Other Publications
2.4 References for Extracts in Mandatory Sections
Chapter 3 Definitions
3.1 General
3.2 NFPA Official Definitions
3.3 General Definitions
Chapter 4 Fundamentals
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
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
Chapter 5 Single Burner Boilers
5.1 Application
5.2 Purpose
5.3 Equipment Requirements
5.4 Starting of a Cold Boiler
5.5 Operating Systems
5.6 Simultaneous Firing of Oil and Gas Fuels
5.7 Simultaneous Firing of Oil and Gas for Fuel Transfer Only
5.8 Dual Oil Atomizers in a Single Burner
Chapter 6 Multiple Burner Boilers
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
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 Interlock System
7.10 Alarm System
Chapter 8 Heat Recovery Steam Generators and Other Combustion Turbine Exhaust Systems
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
9.1 Application
9.2 Purpose
9.3 General
9.4 Design
9.5 Operation
9.6 Special Systems
Chapter 10 Stokers
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 Multiple Burner Boiler Supervised Manual Systems
Annex C Multiple Burner Boiler Fundamental Principles of a Manual System
Annex D Multiple Burner Boiler Low NOx Operation - Special Considerations
Annex E Industry Experience (Reserved)
Annex F Solid Fuel Firing in Stokers
Annex G Stoker Descriptions
Annex H Guidelines for Determining the Minimum Permitted Temperature for Feeding a Fuel into a Fluidized Bed
Annex I Sample Ordinance Adopting NFPA 85
Annex J Safety
Annex K Fuel Hazards
Annex L Personnel Hazards of Atmospheric Fluidized Bed Boilers
Annex M Origin and Development of NFPA 85
Annex N Informational References
Index