NFPA 85 15:2015 Edition

$80.71

NFPA 85: Boiler and Combustion Systems Hazards Code

Published By	Publication Date	Number of Pages
NFPA	2015	240

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Category: NFPA

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Description

In response to newly identified fire safety concerns, the 2015 NFPA 85 presents updated requirements for boiler and combustion systems. Boiler hazards not only impact operational performance, they can cause explosions and jeopardize the lives of facility occupants and maintenance personnel. Revised for 2015, NFPA 85: Boiler and Combustion Systems Hazards Code gives everyone involved with large boiler installations and pulverized fuel systems the information they need for fire safety compliance — from design and installation to inspection. NFPA 85 presents requirements for the full range of equipment: 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 in the 2015 edition of NFPA 85 include: New requirements to facilitate safe purging of fuel gas piping in and out of service, including requiring a designated equipment isolation valve, purging upstream piping in accordance with the applicable standard, and minimum safety requirements for purging piping and equipment downstream of the equipment isolation valve. Several provisions concerning multiple burner boilers (formerly in Chapter 6) were relocated to Chapter 4, General Requirements to indicate they apply to all equipment under the scope of NFPA 85. Relocated requirements include conducting a process hazard analysis for unattended operation, restrictions on removing interlocks from service during startup or operation, and preventing the flow of flue gases from a common stack into an idle boiler or Heat Recovery Steam Generator (HRSG). Safety-rated programmable logic controllers are recognized in the Code for use with single-burner boilers where they are certified as at least SIL 3-capable according to IEC 61508. Chapter 9, Pulverized Fuel Systems, was completely rewritten to separate requirements for direct-fired and indirect-fired systems to help users identify and apply requirements for specific equipment. Boiler or combustion system designers, operators, facility managers, and enforcers all need to stay up-to-code with NFPA 85

PDF Catalog

PDF Pages	PDF Title
2	Important and Disclaimers
3	Additional Notices and Disclaimers
4	2.1 General 2.2 NFPA Publications
14	Chapter 1 Administration 1.1 Scope 1.2 Purpose 1.3 Application
15	1.4 Retroactivity 1.5 Equivalency 1.6 Enforcement Chapter 2 Referenced Publications 2.3 Other Publications 2.4 References for Extracts in Mandatory Sections
16	Chapter 3 Definitions 3.1 General 3.2 NFPA Official Definitions 3.3 General Definitions
22	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
23	4.5 Basic Operating Requirements
24	4.6 Structural Design 4.7 Functional Requirements of Fuel-Burning System
25	4.8 Multiple Boilers or HRSGs 4.9 Gaseous Vent System Requirements 4.10 Fuel System Piping
26	4.11 Burner Management System Logic
27	4.12 Flame Monitoring and Tripping Systems
28	4.13 Combustion Control System 4.14 Power Supplies 4.15 Operating Information
29	4.16 Selective Catalytic Reduction Chapter 5 Single Burner Boilers 5.1 Application 5.2 Purpose 5.3 Unattended Operation 5.4 Equipment Requirements
32	5.5 Starting of a Cold Boiler
33	5.6 Operating Systems
36	5.7 Simultaneous Firing of Oil and Gas Fuels
41	5.8 Simultaneous Firing of Oil and Gas for Fuel Transfer Only
43	5.9 Dual Oil Atomizers in a Single Burner
44	Chapter 6 Multiple Burner Boilers 6.1 Application 6.2 Purpose 6.3 Mechanical Equipment Requirements
45	6.4 Burner Management and Combustion Control Requirements
54	6.5 Furnace Implosion Protection
55	6.6 Fuel Gas Systems
64	6.7 Fuel Oil Systems
73	6.8 Pulverized Coal Systems
82	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
83	7.4 Equipment Requirements
89	7.5 Furnace Pressure Excursion Prevention
91	7.6 Sequence of Operations
95	7.7 Sequence of Operations for Gas-Fired Warm-Up Burners
101	7.8 Sequence of Operations for Oil-Fired Warm-Up Burners
108	7.9 Interlock System
114	7.10 Alarm System
116	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
119	8.5 HRSG Enclosure and Other Combustion Turbine Exhaust Systems 8.6 Electrical
120	8.7 Controls, Monitoring, Alarms, and Interlocks
122	8.8 Purge, Start-up, Operation, and Shutdown of HRSG and Other Combustion Turbine Exhaust Systems
127	8.9 Combustion Turbine Exhaust Bypass Systems
129	8.10 Combustion Turbine and HRSG with Fresh Air Firing Capability
130	8.11 Combustion Turbine Exhaust System
131	Chapter 9 Pulverized Fuel Systems 9.1 Application 9.2 Purpose 9.3 General
132	9.4 Direct-Fired Pulverized Fuel Systems
136	9.5 Indirect-Fired Pulverized Fuel Systems
140	9.6 Operation
142	9.7 Special Systems
147	Chapter 10 Stokers 10.1 Purpose 10.2 Fuel-Burning System
148	10.3 Combustion Control System 10.4 Operation
150	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
188	Annex B Multiple Burner Boiler Supervised Manual Systems
200	Annex C Multiple Burner Boiler Low NOx Operation — Special Considerations
201	Annex D Fluidized Bed Boilers Supplemental Information
205	Annex E Common Pulverized Fuel System Designs
211	Annex F Supplemental Information on Stoker-Fired Boilers
219	Annex G Sample Ordinance Adopting NFPA 85 Annex H Safety
221	Annex I Fuel Hazards
223	Annex J Origin and Development of NFPA 85
225	Annex K Informational References
227	Index