NFPA® 54–2012 ANSI Z223.1–2012 National Fuel Gas Code 2012 Edition

Chapter 1 Administration
1.1 Scope
1.2 Purpose
1.3 Retroactivity
1.4 Equivalency
1.5 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 General
4.1 Qualified Agency
4.2 Interruption of Service
4.3 Prevention of Accidental Ignition
Chapter 5 Gas Piping System Design, Materials, and Components
5.1 Piping Plan
5.2 Provision for Location of Point of Delivery
5.3 Interconnections Between Gas Piping Systems
5.4 Sizing of Gas Piping Systems
5.5 Piping System Operating Pressure Limitations
5.6 Acceptable Piping Materials and Joining Methods
5.7 Gas Meters
5.8 Gas Pressure Regulators
5.9 Overpressure Protection Devices
5.10 Back Pressure Protection
5.11 Low-Pressure Protection
5.12 Shutoff Valves
5.13 Excess Flow Valve(s)
5.14 Expansion and Flexibility
Chapter 6 Pipe Sizing
6.1 Pipe Sizing Methods.
6.2 Tables for Sizing Gas Piping Systems Using Natural Gas
6.3 Tables for Sizing Gas Piping Systems Using Propane
6.4 Sizing Equations
Chapter 7 Gas Piping Installation
7.1 Piping Underground
7.2 Installation of Piping
7.3 Concealed Piping in Buildings
7.4 Piping in Vertical Chases
7.5 Gas Pipe Turns
7.6 Drips and Sediment Traps
7.7 Outlets
7.8 Branch Pipe Connection
7.9 Manual Gas Shutoff Valves
7.10 Prohibited Devices
7.11 Systems Containing Gas–Air Mixtures Outside the Flammable Range
7.12 Systems Containing Flammable Gas–Air Mixtures
7.13 Electrical Bonding and Grounding
7.14 Electrical Circuits
7.15 Electrical Connections
Chapter 8 Inspection, Testing, and Purging
8.1 Pressure Testing and Inspection
8.2 Piping System Leak Check
8.3 Purging Requirements
Chapter 9 Appliance, Equipment, and Accessory Installation
9.1 General
9.2 Accessibility and Clearance
9.3 Air for Combustion and Ventilation
9.4 Appliances on Roofs
9.5 Appliances in Attics
9.6 Appliance and Equipment Connections to Building Piping
9.7 Electrical
9.8 Room Temperature Thermostats
Chapter 10 Installation of Specific Appliances
10.1 General
10.2 Air-Conditioning Appliances (Gas-Fired Air Conditioners and Heat Pumps)
10.3 Central Heating Boilers and Furnaces
10.4 Clothes Dryers
10.5 Conversion Burners
10.6 Decorative Appliances for Installation in Vented Fireplaces
10.7 Gas Fireplaces, Vented
10.8 Non-Recirculating Direct Gas-Fired Industrial Air Heaters
10.9 Recirculating Direct Gas-Fired Industrial Air Heaters
10.10 Duct Furnaces
10.11 Floor Furnaces
10.12 Food Service Appliance, Floor-Mounted
10.13 Food Service Appliances, Counter Appliances
10.14 Hot Plates and Laundry Stoves
10.15 Household Cooking Appliances
10.16 Illuminating Appliances
10.17 Incinerators, Commercial-Industrial
10.18 Infrared Heaters
10.19 Open-Top Broiler Units
10.20 Outdoor Cooking Appliances
10.21 Pool Heaters
10.22 Refrigerators
10.23 Room Heaters
10.24 Stationary Gas Engines
10.25 Gas-Fired Toilets
10.26 Unit Heaters
10.27 Wall Furnaces
10.28 Water Heaters
10.29 Compressed Natural Gas (CNG) Vehicular Fuel Systems
10.30 Appliances for Installation in Manufactured Housing
10.31 Fuel Cell Power Plants
10.32 Outdoor Open Flame Decorative Appliances
Chapter 11 Procedures to Be Followed to Place Appliance in Operation
11.1 Adjusting the Burner Input
11.2 Primary Air Adjustment
11.3 Safety Shutoff Devices
11.4 Automatic Ignition
11.5 Protective Devices
11.6 Checking the Draft
11.7 Operating Instructions
Chapter 12 Venting of Appliances
12.1 Minimum Safe Performance
12.2 General
12.3 Specification for Venting
12.4 Design and Construction
12.5 Type of Venting System to Be Used
12.6 Masonry, Metal, and Factory-Built Chimneys
12.7 Gas Vents
12.8 Single-Wall Metal Pipe
12.9 Through-the-Wall Vent Termination
12.10 Condensation Drain
12.11 Vent Connectors for Category I Appliances
12.12 Vent Connectors for Category II, Category III, and Category IV Appliances
12.13 Draft Hoods and Draft Controls
12.14 Manually Operated Dampers
12.15 Automatically Operated Vent Dampers
12.16 Obstructions
Chapter 13 Sizing of Category I Venting Systems
13.1 Additional Requirements to Single Appliance Vent
13.2 Additional Requirements to Multiple-Appliance Vent
Annex A Explanatory Material
Annex B Sizing and Capacities of Gas Piping
Annex C Suggested Method of Checking for Leakage
Annex D Suggested Emergency Procedure for Gas Leaks
Annex E Flow of Gas Through Fixed Orifices
Annex F Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed for Use with Type B Vents
Annex G Recommended Procedure for Safety Inspection of an Existing Appliance Installation
Annex H Indoor Combustion Air Calculation Examples
Annex I Example of Combination of Indoor and Outdoor Combustion and Ventilation Opening Design
Annex J Other Useful Definitions
Annex K Enforcement
Annex L Informational References