NFPA 8502 : 1999

Chapter 1 Introduction
1-1 Scope
1-2 Purpose
Chapter 2 General
2-1 Furnace explosions
2-2 Furnace implosions
2-3 Manufacture, design and engineering
2-4 Installation
2-5 Coordination of design, construction and operation
2-6 Maintenance organization
2-7 Basic operating objectives
Chapter 3 Definitions
3-1 Definitions
Chapter 4 Equipment requirements
4-1 Furnace structural design
4-2 Functional requirements of fuel-burning system
4-3 Burner management system logic
4-4 Flame monitoring and tripping systems
4-5 Combustion control system
4-6 Power supplies
4-7 Operating information
Chapter 5 Furnace implosion protection
5-1 General
5-2 Furnace pressure control systems (implosion
    protection)
5-3 Sequence of operations requirements
5-4 Interlock system functional requirements
5-5 Alarm system
Chapter 6 Fuel gas systems
6-1 General
6-2 Gas firing - special problems
6-3 System requirements
6-4 Flame monitoring and tripping system
6-5 Sequence of operations
6-6 Interlock system
6-7 Alarm system
6-8 Boiler front control (supervised manual)
6-9 Two-burner systems - single fuel flow control
Chapter 7 Fuel oil systems
7-1 General
7-2 Oil firing - special problems
7-3 System requirements
7-4 Flame monitoring and tripping system
7-5 Sequence of operations
7-6 Interlock system
7-7 Alarm system
7-8 Boiler front control (supervised manual)
7-9 Two-burner systems - single fuel flow control
Chapter 8 Pulverized coal systems
8-1 General
8-2 Coal firing - special problems
8-3 System requirements
8-4 Flame monitoring and tripping system
8-5 Sequence of operations
8-6 Interlock system
8-7 Alarm system
Chapter 9 Maintenance, Inspection, Training and Safety
9-1 Maintenance and equipment inspection
9-2 Training
Chapter 10 Referenced publications
Appendix A Explanatory material
Appendix B Referenced publications
Index

Gives safety requirements for boilers with a minimum fuel input of 12.5 million Btu/hr and firing more than one burner. Boilers that use gas, pulverized coal and fuel are covered. Safety requirements including purging and interlocks are intended to prevent explosions and implosions in the combustion system.