🔥🔥 Don’t Miss Out on Our End of Autumn Sale. If you have any questions, feel free to click the bottom right corner to contact our customer service..

Concat us[email protected]
Shopping Cart

No products in the cart.

🔍
NFPA 54/ANSI Z223.1, National Fuel Gas Code:2021 Edition

NFPA 54/ANSI Z223.1, National Fuel Gas Code:2021 Edition

$64.35

NFPA 54/ANSI Z223.1, National Fuel Gas Code

Published By Publication Date Number of Pages
NFPA 2021
PDF Format Searchable Printable Preview Now
Guaranteed Safe Checkout
Category:

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

PDF Catalog

PDF Pages PDF Title
1 Copyright
Edition
Origin and Development
2 Committee Lists for NFPA-54-2021
5 Chapter 1 : Administration
1.1 Scope. 1.1.1 Applicability. 1.1.1.1
1.1.1.2
1.1.2 Other Standards.
1.2 Purpose.
6 1.3 Retroactivity.
1.4 Equivalency.
1.5 Enforcement.
Chapter 2 : Referenced Publications
2.1 General.
2.2 NFPA Publications.
2.3 Other Publications. 2.3.1 ASME Publications.
7 2.3.2 ASTM Publications.
2.3.3 CSA Group Publications.
8 2.3.4 MSS Publications.
2.3.5 UL Publications.
2.3.6 US Government Publications.
2.3.7 Other Publications.
2.4 References for Extracts in Mandatory Sections.
9 Chapter 3 : Definitions
3.1 General.
3.2 NFPA Official Definitions. 3.2.1 * Approved.
3.2.2 * Authority Having Jurisdiction (AHJ).
3.2.3 * Code.
3.2.4 Labeled.
3.2.5 * Listed.
3.2.6 Shall.
3.3 General Definitions. 3.3.1 Accessible.
3.3.1.1
3.3.2 Air. 3.3.2.1
3.3.2.2
3.3.2.3
3.3.2.4
3.3.3 Anodeless Riser.
3.3.4 Appliance.
3.3.4.1
3.3.4.2
3.3.4.3
3.3.4.4
3.3.4.4.1 Baking and Roasting Oven.
3.3.4.4.2 Gas Counter Appliance.
3.3.4.4.3 Gas Deep Fat Fryer.
10 3.3.4.4.4 Kettle.
3.3.4.4.5 Steam Cooker.
3.3.4.4.6 Steam Generator.
3.3.4.5
3.3.4.6
3.3.4.6.1 Household Broiler Cooking Appliance.
3.3.4.6.2 Household Built-In Unit Cooking Appliance.
3.3.4.7
3.3.4.8
3.3.4.9
3.3.4.10
3.3.4.10.1 * Category I Vented Appliance.
3.3.4.10.2 Category II Vented Appliance.
3.3.4.10.3 Category III Vented Appliance.
3.3.4.10.4 Category IV Vented Appliance.
3.3.5 Appliance Categorized Vent Diameter/Area.
3.3.6 Automatic Firecheck.
3.3.7 Automatic Vent Damper.
3.3.8 Backfire Preventer.
3.3.9 Baffle.
3.3.10 Boiler. 3.3.10.1
3.3.10.2
3.3.10.3
3.3.10.4
3.3.11 Bonding Jumper.
3.3.12 Branch Line.
3.3.13 Breeching.
11 3.3.14 Broiler.
3.3.14.1
3.3.15 Btu.
3.3.16 Burner.
3.3.16.1
3.3.16.2
3.3.16.3
3.3.16.4
3.3.16.5
3.3.16.5.1 Fan-Assisted Power Burner.
3.3.17 Chimney.
3.3.17.1
3.3.17.2
3.3.17.3
3.3.17.4
3.3.18 Clothes Dryer.
3.3.18.1
3.3.18.2
3.3.19 Combustion.
3.3.20 Combustion Chamber.
3.3.21 Combustion Products.
3.3.22 Condensate.
3.3.23 Controls.
3.3.23.1
3.3.24 Copper Alloy.
3.3.25 Cubic Foot (ft ) of Gas.
3.3.26 Deep Fat Fryer.
12 3.3.27 Device. 3.3.27.1
3.3.27.2
3.3.27.3
3.3.27.4
3.3.28 Diversity Factor.
3.3.29 Draft.
3.3.29.1
3.3.29.2
3.3.30 Draft Hood.
3.3.31 Drip.
3.3.32 Dry Gas.
3.3.33 Effective Ground-Fault Current Path.
3.3.34 Engineering Methods.
3.3.35 Equipment.
3.3.36 Explosion Heads (Soft Heads or Rupture Discs).
3.3.37 FAN Max.
3.3.38 FAN Min.
3.3.39 FAN+FAN.
3.3.40 FAN+NAT.
3.3.41 Fireplace.
3.3.41.1
3.3.41.1.1 Direct Vent Gas Fireplace.
3.3.41.1.2 Vented Gas Fireplace.
3.3.42 Flame Arrester.
13 3.3.43 Flue. 3.3.43.1
3.3.43.2
3.3.44 Flue Collar.
3.3.45 Furnace. 3.3.45.1
3.3.45.2
3.3.45.3
3.3.45.4
3.3.45.5
3.3.45.6
3.3.45.7
3.3.46 Furnace Plenum.
3.3.47 Garage. 3.3.47.1
3.3.47.2
3.3.48 Gas Convenience Outlet.
3.3.49 Gases.
3.3.49.1
3.3.49.2
3.3.49.3
3.3.50 Gas-Fired Air Conditioner.
3.3.51 Gas-Fired Heat Pump.
3.3.52 Gas-Mixing Machine.
3.3.53 * Gas Vent.
3.3.53.1
14 3.3.53.2
3.3.53.3
3.3.53.4
3.3.53.5
3.3.54 Gravity.
3.3.55 Grounding Electrode.
3.3.56 Heater. 3.3.56.1
3.3.56.2
3.3.56.3
3.3.56.4
3.3.56.5
3.3.56.6
3.3.56.7
3.3.57 Heating Value (Total).
3.3.58 Hot Plate.
3.3.58.1
3.3.59 Ignition. 3.3.59.1
3.3.59.2
3.3.60 Insulating Millboard.
3.3.61 Kettle.
3.3.62 Manifold. 3.3.62.1
3.3.62.2
3.3.63 Manufactured Home.
15 3.3.64 Material. 3.3.64.1 *
3.3.64.2
3.3.65 Meter.
3.3.66 Mixing Blower.
3.3.67 NA.
3.3.68 NAT Max.
3.3.69 NAT+NAT.
3.3.70 Occupancy. 3.3.70.1
3.3.70.2
3.3.71 Orifice.
3.3.72 Oven, Baking and Roasting.
3.3.73 Parking Structure.
3.3.73.1
3.3.73.2
3.3.74 Pilot.
3.3.75 Pipe.
3.3.75.1
3.3.76 Piping.
3.3.76.1
3.3.76.2
3.3.77 Plenum.
3.3.78 Point of Delivery.
3.3.79 Pressure.
3.3.79.1
3.3.79.2
3.3.79.3
16 3.3.79.4
3.3.79.5
3.3.80 Pressure Drop.
3.3.81 Purge.
3.3.82 Qualified Agency.
3.3.83 Refrigerator (Using Gas Fuel).
3.3.84 Regulator. 3.3.84.1
3.3.84.1.1 Barometric Draft Regulator.
3.3.84.2
3.3.84.3
3.3.84.4 *
3.3.84.5
3.3.84.6
3.3.84.7
3.3.84.8
3.3.85 Relief Opening.
3.3.86 Safety Blowout (Backfire Preventer).
3.3.87 Service Head Adapter.
3.3.88 Service Meter Assembly.
3.3.89 Service Regulator.
3.3.90 Shutoff.
3.3.91 Specific Gravity.
3.3.92 Steam Cooker.
3.3.93 Steam Generator.
3.3.94 Stress.
3.3.94.1
17 3.3.95 System. 3.3.95.1
3.3.95.2
3.3.95.3
3.3.95.4
3.3.95.5
3.3.95.6
3.3.95.7 *
3.3.95.7.1 Mechanical Draft Venting System.
3.3.96 Tensile Strength.
3.3.97 Tubing.
3.3.98 Valve. 3.3.98.1
3.3.98.2
3.3.98.3
3.3.98.4
3.3.98.5
3.3.98.5.1 Pressure Relief Valve.
3.3.98.5.2 Temperature Relief Valve.
3.3.98.5.3 Vacuum Relief Valve.
3.3.98.6
3.3.98.7
3.3.99 Valve Member.
3.3.99.1
3.3.100 Vent Connector.
3.3.101 Vent Offset.
3.3.102 Venting.
3.3.103 Wall Head Adapter.
18 3.3.104 Zero Governor.
Chapter 4 : General
4.1 Qualified Agency.
4.2 Interruption of Service. 4.2.1 Notification of Interrupted Service.
4.2.2 Work Interruptions.
4.3 Prevention of Accidental Ignition. 4.3.1 Potential Ignition Sources.
4.3.2 Handling of Flammable Liquids. 4.3.2.1 * Drip Liquids.
4.3.2.2 Other Flammable Liquids.
4.4 * Noncombustible Material.
4.5 Engineering Methods.
Chapter 5 : Gas Piping System Design, Materials, and Components
5.1 Piping Plan. 5.1.1 Installation of Piping System.
19 5.1.2 Addition to Existing System.
5.2 Interconnections Between Gas Piping Systems. 5.2.1 Interconnections Supplying Separate Users.
5.2.2 Interconnections for Standby Fuels. 5.2.2.1
5.2.2.2
5.3 Sizing of Gas Piping Systems. 5.3.1 * General Considerations.
5.3.2 * Maximum Gas Demand. 5.3.2.1 *
5.3.2.2
5.3.2.3
5.3.3 * Sizing Methods.
5.3.4 Allowable Pressure Drop.
5.4 Operating Pressure. 5.4.1 Piping System Operating Pressure Limitations.
5.4.2 Flammable Gas–Air Mixtures.
5.4.3 LP-Gas Piping Systems.
5.4.4 Maximum Operating Pressure in Buildings.
20 5.4.5 LP-Gas Systems Operating Below -5°F (-21°C).
5.5 Piping Materials and Joining Methods. 5.5.1 General. 5.5.1.1 Acceptable Materials.
5.5.1.2 Used Materials.
5.5.2 Metallic Pipe. 5.5.2.1 Cast Iron.
5.5.2.2 Steel, Stainless Steel, and Wrought Iron.
5.5.2.3 * Copper and Copper Alloy.
5.5.2.4 Threaded Copper, Copper Alloy, and Aluminum.
5.5.2.5 Aluminum Alloy.
5.5.2.6 Aluminum Installation.
5.5.3 Metallic Tubing. 5.5.3.1
5.5.3.2 Steel.
5.5.3.3 Stainless Steel.
5.5.3.4 * Copper and Copper Alloy.
5.5.3.5 Aluminum.
5.5.3.6 Corrugated Stainless Steel.
5.5.4 Plastic Pipe, Tubing, and Fittings. 5.5.4.1 Standard and Marking. 5.5.4.1.1
5.5.4.1.2
5.5.4.1.3
21 5.5.4.2 * Regulator Vent Piping.
5.5.4.3 Anodeless Risers.
5.5.5 Workmanship and Defects.
5.5.6 Metallic Pipe Threads. 5.5.6.1 Specifications for Pipe Threads.
5.5.6.2 Damaged Threads.
5.5.6.3 Number of Threads.
5.5.6.4 * Thread Joint Sealing. 5.5.6.4.1
5.5.6.4.2
5.5.6.4.3
5.5.7 Metallic Piping Joints and Fittings.
5.5.7.1 * Pipe Joints.
5.5.7.2 Copper Tubing Joints.
5.5.7.3 Stainless Steel Tubing Joints.
22 5.5.7.4 Flared Joints.
5.5.7.5 Metallic Pipe Fittings.
5.5.8 Plastic Piping Joints and Fittings.
5.5.9 Flanges. 5.5.9.1 Flange Specifications. 5.5.9.1.1
5.5.9.1.2
5.5.9.1.3
5.5.9.1.4
5.5.9.2 Dissimilar Flange Connections.
5.5.9.3 Flange Facings.
5.5.9.4 Lapped Flanges.
5.5.10 Flange Gaskets.
5.5.10.1
23 5.5.10.2 Gasket Specifications. 5.5.10.2.1
5.5.10.2.2
5.5.10.3
5.5.10.4
5.6 * Gas Meters. 5.6.1 Capacity.
5.6.2 Location. 5.6.2.1
5.6.2.2
5.6.2.3
5.6.3 Supports.
5.6.4 Meter Protection.
5.6.5 Identification.
5.7 * Gas Pressure Regulators. 5.7.1 Where Required.
5.7.2 Listing.
5.7.3 Location.
5.7.4 Regulator Protection.
5.7.5 Regulator Vents.
5.7.6 Identification.
5.8 Overpressure Protection Devices. 5.8.1 Where Required.
5.8.2 Pressure Limitation Requirements. 5.8.2.1
24 5.8.2.2
5.8.2.3
5.8.2.4
5.8.2.5
5.8.3 Overpressure Protection Devices. 5.8.3.1
5.8.3.2
5.8.4 Construction and Installation.
5.8.5 External Control Piping.
5.8.6 Setting.
5.8.7 Unauthorized Operation.
5.8.8 Vents. 5.8.8.1
5.8.8.2
5.8.9 Size of Fittings, Pipe, and Openings.
5.9 Back Pressure Protection. 5.9.1 Where to Install. 5.9.1.1
5.9.1.2
25 5.9.2 Protective Devices.
5.10 * Low-Pressure Protection.
5.11 Shutoff Valves.
5.12 Excess Flow Valve(s).
5.13 Expansion and Flexibility. 5.13.1 Design.
5.13.2 Special Local Conditions.
5.14 Pressure Regulator and Pressure Control Venting.
26 Chapter 6 : Pipe Sizing
6.1 * Pipe Sizing Methods.
6.1.1 * Longest Length Method.
6.1.2 * Branch Length Method.
6.1.3 Hybrid Pressure.
6.2 Sizing Natural Gas Piping Systems.
6.2.1
47 6.2.2
6.3 Sizing Propane Piping Systems.
6.3.1
57 6.3.2
6.4 Sizing Equations.
6.4.1 * Low-Pressure Gas Formula.
6.4.2 * High-Pressure Gas Formula.
58 Chapter 7 : Gas Piping Installation
7.1 Installation of Underground Piping. 7.1.1 Clearances. 7.1.1.1
7.1.1.2
7.1.2 Protection Against Damage.
7.1.2.1 Cover Requirements.
7.1.2.2 Trenches.
7.1.2.3 Backfilling.
7.1.3 * Corrosion Protection of Piping.
7.1.3.1
7.1.3.2
7.1.3.3
7.1.3.4
59 7.1.3.5
7.1.3.6
7.1.3.7
7.1.3.8
7.1.3.9
7.1.4 * Protection Against Freezing.
7.1.5 Piping Through Foundation Wall.
7.1.6 Piping Underground Beneath Buildings.
7.1.6.1 Conduit with One End Terminating Outdoors.
7.1.6.2 Conduit with Both Ends Terminating Indoors.
7.1.7 Plastic Piping. 7.1.7.1 Connection of Plastic Piping.
7.1.7.2 Connections Between Metallic and Plastic Piping.
7.1.7.3 Tracer Wire.
7.1.7.3.1
7.1.7.3.2
7.1.8
7.2 Installation of Aboveground Piping. 7.2.1
60 7.2.2 * Protective Coating.
7.2.3 Building Structure. 7.2.3.1
7.2.3.2
7.2.4 Gas Piping to Be Sloped.
7.2.5 * Prohibited Locations.
7.2.6 Hangers, Supports, and Anchors. 7.2.6.1
7.2.6.2
7.2.6.3
7.2.6.4 Piping on Roofs. 7.2.6.4.1
7.2.6.4.2
7.2.7 CSST.
7.3 Concealed Piping in Buildings. 7.3.1 General.
7.3.2 Fittings in Concealed Locations.
7.3.3 Piping in Partitions.
61 7.3.4 Tubing in Partitions.
7.3.5 Piping in Floors. 7.3.5.1 Industrial Occupancies.
7.3.5.2 Other Occupancies.
7.3.6 Shutoff Valves in Tubing Systems.
7.4 Piping in Vertical Chases.
7.4.1 Pressure Reduction.
7.4.2 Chase Construction.
7.4.3 * Ventilation.
7.5 Gas Pipe Turns.
7.5.1 Metallic Pipe.
7.5.2 Plastic Pipe.
7.5.3 Elbows.
7.6 Drips and Sediment Traps. 7.6.1 Provide Drips Where Necessary.
7.6.2 Location of Drips.
7.6.3 Sediment Traps.
62 7.7 Outlets. 7.7.1 Location and Installation. 7.7.1.1
7.7.1.2
7.7.1.3
7.7.1.4
7.7.1.5
7.7.1.6
7.7.2 Cap All Outlets. 7.7.2.1
7.7.2.2
7.8 Manual Gas Shutoff Valves. 7.8.1 Accessibility of Gas Valves. 7.8.1.1
7.8.1.2
7.8.2 Valves at Regulators.
7.8.3 Valves Controlling Multiple Systems. 7.8.3.1 Shutoff Valves for Multiple House Lines.
7.8.3.2 Emergency Shutoff Valves.
7.8.3.3 Shutoff Valve for Laboratories.
7.8.4 * System Shutoff Valves.
7.9 Prohibited Devices.
7.10 Systems Containing Gas–Air Mixtures Outside the Flammable Range.
63 7.11 Systems Containing Flammable Gas–Air Mixtures. 7.11.1 Required Components.
7.11.2 Optional Components.
7.11.3 Additional Requirements.
7.11.4 * Special Requirements for Mixing Blowers.
7.11.5 Installation of Gas-Mixing Machines. 7.11.5.1 * Location.
7.11.5.2 Electrical Requirements.
7.11.5.3 Air Intakes.
7.11.5.4 * Controls.
7.11.5.5 Installation in Parallel.
7.11.6 Use of Automatic Firechecks, Safety Blowouts, or Backfire Preventers.
7.12 Electrical Bonding and Grounding. 7.12.1 Pipe and Tubing Other than CSST.
7.12.2 * CSST.
7.12.2.1
7.12.2.2
64 7.12.2.3 *
7.12.2.4
7.12.2.5
7.12.3 Arc-Resistant Jacketed CSST.
7.12.4 Electrical Isolation. 7.12.4.1 *
7.12.4.2
7.12.4.2.1
7.12.5 * Lightning Protection Systems.
7.13 Electrical Circuits.
7.14 Electrical Connections. 7.14.1
7.14.2
Chapter 8 : Inspection, Testing, and Purging
8.1 Pressure Testing and Inspection. 8.1.1 * General. 8.1.1.1
8.1.1.2
8.1.1.3
8.1.1.4
8.1.1.5
8.1.1.6
8.1.1.7 *
65 8.1.2 Test Medium.
8.1.3 Test Preparation. 8.1.3.1
8.1.3.2
8.1.3.3
8.1.3.4
8.1.3.5
8.1.3.6
8.1.4 Test Pressure. 8.1.4.1
8.1.4.2
8.1.4.3 *
8.1.5 Detection of Leaks and Defects. 8.1.5.1
8.1.5.2
8.1.5.3
8.2 Piping System Leak Check. 8.2.1 Test Gases.
8.2.2 Turning Gas On.
8.2.3 * Leak Check.
8.2.4 Placing Appliances and Equipment in Operation.
8.3 * Purging Requirements.
8.3.1 * Piping Systems Required to Be Purged Outdoors.
66 8.3.1.1 Removal from Service.
8.3.1.2 * Placing in Operation.
8.3.1.3 Outdoor Discharge of Purged Gases.
8.3.1.4 * Combustible Gas Indicator.
8.3.2 * Piping Systems Allowed to Be Purged Indoors or Outdoors.
8.3.2.1 * Purging Procedure.
8.3.2.2 Combustible Gas Detector.
8.3.3 Purging Appliances and Equipment.
Chapter 9 : Appliance, Equipment, and Accessory Installation
9.1 General. 9.1.1 * Appliances, Equipment, and Accessories to Be Approved.
9.1.1.1
9.1.1.2
9.1.1.3
9.1.2 Added or Converted Appliances.
67 9.1.3 Type of Gas(es).
9.1.4 Safety Shutoff Devices for Unlisted LP-Gas Appliances Used Indoors.
9.1.5 Use of Air or Oxygen Under Pressure.
9.1.6 * Protection of Appliances from Fumes or Gases Other than Products of Combustion. 9.1.6.1
9.1.6.2
9.1.7 Process Air.
9.1.8 Appliance Support. 9.1.8.1
9.1.8.2
9.1.9 Flammable Vapors.
9.1.10 Installation in Residential Garages. 9.1.10.1
9.1.10.2
9.1.10.3
9.1.11 Installation in Commercial Garages. 9.1.11.1 Parking Structures.
9.1.11.2 Repair Garages.
9.1.12 Installation in Aircraft Hangars.
9.1.13 Appliance Physical Protection.
9.1.14 Venting of Flue Gases.
9.1.15 Extra Device or Attachment.
9.1.16 Avoiding Strain on Gas Piping.
68 9.1.17 Gas Appliance Pressure Regulators.
9.1.18 Bleed Lines for Diaphragm-Type Valves.
9.1.19 Combination of Appliances and Equipment.
9.1.20 * Installation Instructions.
9.1.21 Protection of Outdoor Appliances.
9.1.22 * Existing Appliances.
9.2 Accessibility and Clearance. 9.2.1 Accessibility for Service.
9.2.2 Clearance to Combustible Materials.
9.2.3 Installation on Carpeting.
9.3 * Air for Combustion and Ventilation. 9.3.1 General. 9.3.1.1
9.3.1.2
9.3.1.3
9.3.1.4
9.3.1.5
69 9.3.2 Indoor Combustion Air.
9.3.2.1 * Standard Method.
9.3.2.2 * Known Air Infiltration Rate Method.
9.3.2.3 Indoor Opening Size and Location.
9.3.3 Outdoor Combustion Air.
9.3.3.1 Two Permanent Openings Method.
9.3.3.2 * One Permanent Opening Method.
9.3.4 Combination Indoor and Outdoor Combustion Air.
9.3.5 Engineered Installations.
9.3.6 Mechanical Combustion Air Supply.
9.3.6.1
9.3.6.2
70 9.3.6.3
9.3.7 Louvers, Grilles, and Screens. 9.3.7.1 Louvers and Grilles.
9.3.7.2 Minimum Screen Mesh Size.
9.3.7.3 Motorized Louvers.
9.3.8 Combustion Air Ducts.
9.3.8.1
9.3.8.2
9.3.8.3
9.3.8.4
9.3.8.5
9.3.8.6
9.3.8.7
9.3.8.8
9.4 Appliances on Roofs. 9.4.1 General. 9.4.1.1
9.4.1.2
9.4.1.3
9.4.2 Installation of Appliances on Roofs. 9.4.2.1
9.4.2.2
9.4.2.3
9.4.2.4
71 9.4.3 Access to Appliances on Roofs. 9.4.3.1
9.4.3.2
9.4.3.3
9.4.3.4
9.5 Appliances in Attics. 9.5.1 Attic Access.
9.5.1.1
9.5.1.2
9.5.2 Work Platform.
9.5.3 Lighting and Convenience Outlet.
9.6 Appliance and Equipment Connections to Building Piping. 9.6.1 Connecting Appliances and Equipment.
9.6.1.1 Protection of Connectors.
9.6.1.2
9.6.1.3 Food Service Appliance Connectors.
9.6.1.4 Restraint.
9.6.1.5 * Suspended Low-Intensity Infrared Tube Heaters.
72 9.6.2 Use of Nonmetallic Gas Hose Connectors.
9.6.3 *
9.6.4 Connection of Portable and Mobile Industrial Appliances. 9.6.4.1
9.6.4.2
9.6.4.3
9.6.4.4
9.6.5 Appliance Shutoff Valves and Connections.
9.6.5.1
9.6.5.2
9.6.5.3
9.6.6 Quick-Disconnect Devices. 9.6.6.1
9.6.6.2
9.6.7 Gas Convenience Outlets.
9.6.8 Sediment Trap.
73 9.6.9 Installation of Piping.
9.7 Electrical. 9.7.1 Electrical Connections.
9.7.2 Electrical Ignition and Control Devices.
9.7.3 Electrical Circuit.
9.8 Room Temperature Thermostats. 9.8.1 Locations.
9.8.2 Drafts.
Chapter 10 : Installation of Specific Appliances
10.1 General. 10.1.1 * Application.
10.1.2 * Installation in a Bedroom or Bathroom.
10.1.3 Locations with Airhandlers.
10.2 Air-Conditioning Appliances. 10.2.1 Application.
10.2.2 Independent Gas Piping.
10.2.3 Connection of Gas Engine–Powered Air Conditioners.
10.2.4 Clearances for Indoor Installation.
74 10.2.5 Assembly and Installation.
10.2.6 Furnace Plenums and Air Ducts.
10.2.7 * Refrigeration Coils.
10.2.8 Switches in Electrical Supply Line.
10.3 Central Heating Boilers and Furnaces. 10.3.1 Application. 10.3.1.1
10.3.1.2 *
75 10.3.2 Location.
10.3.3 Clearances. 10.3.3.1
10.3.3.2
10.3.3.3
76 10.3.3.5
10.3.3.6
10.3.3.7
77 10.3.3.8
10.3.3.9
10.3.4 Assembly and Installation.
10.3.5 Temperature or Pressure Limiting Devices.
10.3.6 Low-Water Cutoff.
10.3.7 * Steam Safety and Pressure Relief Valves.
10.3.7.1
10.3.7.2
10.3.7.3
10.3.8 Furnace Plenums and Air Ducts. 10.3.8.1
10.3.8.2
10.3.8.3 *
10.3.8.4
10.3.9 Refrigeration Coils.
10.3.10 Cooling Units Used with Heating Boilers. 10.3.10.1
10.3.10.2
10.4 Clothes Dryers. 10.4.1 Application.
78 10.4.2 Clearance.
10.4.3 Exhausting to the Outdoors.
10.4.4 Provisions for Make-Up Air. 10.4.4.1
10.4.4.2
10.4.5 Exhaust Ducts for Type 1 Clothes Dryers. 10.4.5.1
10.4.5.2
10.4.5.3
10.4.6 Exhaust Ducts for Type 2 Clothes Dryers. 10.4.6.1
10.4.6.2
10.4.6.3
10.4.6.4
10.4.6.5
10.4.7 Multiple-Family or Public Use.
10.5 Conversion Burners.
10.6 Decorative Appliances for Installation in Vented Fireplaces. 10.6.1 Application.
10.6.2 * Prohibited Installations.
10.6.3 Installation.
10.6.3.1
10.6.3.2
10.6.4 Fireplace Screens.
79 10.7 Gas Fireplaces, Vented. 10.7.1 Application.
10.7.2 * Prohibited Installations.
10.7.3 Installation.
10.7.4 Combustion and Circulating Air.
10.8 Direct Gas-Fired Heating and Forced Ventilation Appliances. 10.8.1 Application.
10.8.2 Prohibited Installations. 10.8.2.1
10.8.2.2
10.8.2.3 *
10.8.3 Installation.
10.8.3.1
10.8.3.2
10.8.3.3
10.8.4 Clearance from Combustible Materials.
10.8.5 Air Supply.
10.8.5.1
10.8.5.2
10.8.5.3
10.8.6 Atmospheric Vents or Gas Reliefs or Bleeds.
10.8.7 Relief Openings.
80 10.8.7.1
10.8.7.2
10.8.8 Purging.
10.9 Duct Furnaces. 10.9.1 Application.
10.9.2 Clearances.
10.9.3 Installation of Duct Furnaces.
10.9.4 Access Panels.
10.9.5 Location of Draft Hood and Controls.
10.9.6 Circulating Air.
10.9.7 Duct Furnaces Used with Refrigeration Systems. 10.9.7.1
10.9.7.2
10.9.7.3 *
10.9.8 Installation in Commercial Garages and Aircraft Hangars.
10.10 Floor Furnaces. 10.10.1 Application.
10.10.2 Installation.
10.10.3 Temperature Limit Controls.
10.10.4 Combustion and Circulating Air.
10.10.5 Placement.
81 10.10.6 Bracing.
10.10.7 Support.
10.10.8 Clearance.
10.10.9 Access.
10.10.10 Seepage Pan.
10.10.11 Wind Protection.
10.10.12 Upper Floor Installations.
10.10.13 First Floor Installation.
10.11 Food Service Appliance, Floor-Mounted. 10.11.1 Application.
10.11.2 Clearance for Listed Appliances.
10.11.3 Mounting on Combustible Floor. 10.11.3.1
10.11.3.2
10.11.4 Installation on Noncombustible Floor. 10.11.4.1
10.11.4.2
10.11.5 Combustible Material Adjacent to Cooking Top.
82 10.11.6 Use with Casters.
10.11.7 Level Installation.
10.11.8 * Ventilation.
10.12 Food Service Appliances, Counter Appliances. 10.12.1 Application.
10.12.2 Vertical Clearance.
10.12.3 Clearance for Appliances.
10.13 Household Cooking Appliances. 10.13.1 Application.
10.13.2 Installation.
10.13.3 Clearances.
10.13.3.1 * Vertical Clearance Above Cooking Top.
10.14 Illuminating Appliances. 10.14.1 Clearances for Listed Appliances.
10.14.2 Clearances for Unlisted Appliances. 10.14.2.1 Enclosed Type.
10.14.2.2 Open-Flame Type.
83 10.14.3 Installation on Buildings.
10.14.4 Installation on Posts.
10.14.5 Appliance Pressure Regulators.
10.15 Incinerators, Commercial-Industrial.
10.16 Infrared Heaters. 10.16.1 Application.
10.16.2 Support.
10.16.3 Clearance.
10.16.4 Combustion and Ventilation Air. 10.16.4.1
10.16.4.2
10.16.5 Installation in Commercial Garages and Aircraft Hangars.
10.17 Open-Top Broiler Units. 10.17.1 Application.
10.17.2 Protection Above Domestic Units.
10.17.3 Commercial Units.
84 10.18 Outdoor Cooking Appliances.
10.19 Pool Heaters. 10.19.1 Application.
10.19.2 Location.
10.19.3 Clearance.
10.19.4 Temperature or Pressure Limiting Devices.
10.19.5 Bypass Valves.
10.19.6 Venting.
10.20 Refrigerators. 10.20.1 Application.
10.20.2 Clearance.
10.20.3 Venting or Ventilating Kits Approved for Use with a Refrigerator.
10.21 Room Heaters. 10.21.1 Application.
10.21.1.1 Vented Room Heaters.
10.21.1.2 Unvented Room Heaters.
10.21.2 * Prohibited Installations.
10.21.3 Installations in Institutions.
10.21.4 Wall-Mounted Room Heaters.
10.22 Stationary Gas Engines.
10.22.1
85 10.23 Gas-Fired Toilets. 10.23.1 Clearance.
10.23.2 Installation on Combustible Floors.
10.23.3 Installation.
10.24 Unit Heaters. 10.24.1 Application.
10.24.2 Support.
10.24.3 Clearance for Suspended-Type Unit Heaters.
10.24.4 Combustion and Circulating Air.
10.24.5 Ductwork.
10.24.6 Installation in Commercial Garages and Aircraft Hangars.
10.25 Wall Furnaces. 10.25.1 Application.
10.25.2 Installation. 10.25.2.1
10.25.2.2
86 10.25.2.3
10.25.2.4
10.25.3 Location.
10.25.4 Combustion and Circulating Air.
10.26 Water Heaters. 10.26.1 Application.
10.26.2 Location.
10.26.3 Clearance.
10.26.4 Pressure Relief Devices.
10.26.5 Temperature Limiting Devices.
10.26.6 Temperature, Pressure, and Vacuum Relief Devices.
10.26.7 Automatic Instantaneous Type: Cold Water Supply.
87 10.26.8 * Antisiphon Devices.
10.27 Compressed Natural Gas (CNG) Vehicular Fuel Systems.
10.28 Appliances for Installation in Manufactured Housing.
10.29 Fuel Cell Power Plants.
10.30 Outdoor Open Flame Decorative Appliances.
10.30.1 Application.
10.30.2 Connection to Piping System.
10.31 Outdoor Infrared Heaters.
Chapter 11 : Procedures to Be Followed to Place Appliance in Operation
11.1 Adjusting the Burner Input. 11.1.1 * Adjusting Input.
11.1.1.1
11.1.1.2
11.1.1.3
11.1.2 High Altitude.
11.2 * Primary Air Adjustment.
88 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. 12.2.1 Installation.
12.3 Specification for Venting. 12.3.1 Connection to Venting Systems.
12.3.2 Appliances Not Required to Be Vented.
12.3.2.1
12.3.2.2
12.3.3 * Ventilating Hoods.
12.3.4 Well-Ventilated Spaces.
89 12.3.5 Direct Vent Appliances. 12.3.5.1
12.3.5.2
12.3.6 Appliances with Integral Vents.
12.3.7 Incinerators.
12.4 Design and Construction. 12.4.1 Appliance Draft Requirements.
12.4.2 Design and Construction.
12.4.3 Mechanical Draft Systems. 12.4.3.1
12.4.3.2
12.4.3.3
12.4.3.4
12.4.3.5
12.4.4 * Ventilating Hoods and Exhaust Systems. 12.4.4.1
12.4.5 Circulating Air Ducts, Above-Ceiling Air-Handling Spaces, and Furnace Plenums. 12.4.5.1
12.4.5.2
12.5 Type of Venting System to Be Used. 12.5.1
90 12.5.2 Plastic Piping.
12.5.3 Plastic Vent Joints.
12.5.4 Special Gas Vents.
12.6 Masonry, Metal, and Factory-Built Chimneys. 12.6.1 Listing or Construction. 12.6.1.1
12.6.1.2
12.6.1.3 *
12.6.2 Termination. 12.6.2.1 *
91 12.6.2.2
12.6.2.3
12.6.2.4
12.6.3 Size of Chimneys. 12.6.3.1
12.6.4 Inspection of Chimneys. 12.6.4.1
12.6.4.2
12.6.4.3
12.6.4.4
12.6.5 Chimney Serving Appliances Burning Other Fuels. 12.6.5.1
12.6.5.2
12.6.5.3 *
12.6.5.4
12.6.6 Support of Chimneys.
12.6.7 Cleanouts.
12.6.8 Space Surrounding Lining or Vent. 12.6.8.1
12.6.8.2
12.6.9 Insulation Shield.
92 12.7 Gas Vents. 12.7.1 Materials.
12.7.2 Installation.
12.7.3 Gas Vent Termination.
12.7.4 Size of Gas Vents.
12.7.4.1 * Category I Appliances.
93 12.7.4.2 Vent Offsets.
12.7.4.3 Category II, Category III, and Category IV Appliances.
12.7.4.4 Sizing.
12.7.5 Gas Vents Serving Appliances on More than One Floor. 12.7.5.1
12.7.5.2 *
12.7.5.3
12.7.6 Support of Gas Vents.
12.7.7 Marking.
12.8 Single-Wall Metal Pipe. 12.8.1 Construction.
12.8.2 * Cold Climate.
12.8.3 Termination.
12.8.4 Installation with Appliances Permitted by 12.5.1. 12.8.4.1 * Prohibited Use.
12.8.4.2
12.8.4.3
12.8.4.4
94 12.8.4.5
12.8.4.6
12.8.5 Size of Single-Wall Metal Pipe.
12.8.6 Support of Single-Wall Metal Pipe.
12.8.7 Marking.
12.9 Through-the-Wall Vent Termination. 12.9.1
95 12.9.3
12.10 Condensation Drain. 12.10.1
12.10.2
12.11 Vent Connectors for Category I Appliances. 12.11.1 Where Required.
12.11.2 Materials. 12.11.2.1
12.11.2.2
12.11.2.3
12.11.2.4
96 12.11.2.5
12.11.3 * Size of Vent Connector. 12.11.3.1
12.11.3.2
12.11.3.3
12.11.3.4
12.11.3.5
12.11.3.6
12.11.3.7
12.11.4 Two or More Appliances Connected to a Single Vent. 12.11.4.1
12.11.4.2
12.11.4.3
97 12.11.5 Clearance.
12.11.6 Joints.
12.11.7 Connector Junctions.
12.11.8 Slope.
12.11.9 * Length of Vent Connector. 12.11.9.1
12.11.9.2
12.11.10 Support.
12.11.11 Chimney Connection. 12.11.11.1
12.11.11.2
12.11.11.3
12.11.12 Inspection.
12.11.13 Fireplaces.
12.11.14 Passage Through Ceilings, Floors, or Walls. 12.11.14.1
12.11.14.2
12.12 Vent Connectors for Category II, Category III, and Category IV Appliances.
12.13 Draft Hoods and Draft Controls. 12.13.1 Appliances Requiring Draft Hoods.
12.13.2 Installation.
12.13.2.1
12.13.3 Draft Control Devices.
98 12.13.4 * Additional Devices.
12.13.5 Location.
12.13.6 Positioning.
12.13.7 Clearance.
12.14 Manually Operated Dampers. 12.14.1
12.14.2 *
12.14.3
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.
105 13.1.1 Obstructions and Vent Dampers.
13.1.2 Vent Downsizing.
13.1.3 Elbows.
106 13.1.4 Zero Lateral.
13.1.5 High-Altitude Installations.
13.1.6 Two-Stage/Modulating Appliances.
13.1.7 * Corrugated Chimney Liners.
13.1.8 Connection to Chimney Liners.
13.1.9 Vertical Vent Upsizing/7 × Rule.
13.1.10 Draft Hood Conversion Accessories.
13.1.11 Chimneys and Vent Locations.
13.1.12 Corrugated Vent Connector Size.
13.1.13 Upsizing.
13.1.14 Multiple Vertical Vent Sizes.
13.1.15 Interpolation.
13.1.16 Extrapolation.
13.1.17 Sizing Vents Not Covered by Tables.
13.1.18 Height Entries.
13.2 Additional Requirements to Multiple-Appliance Vent.
114 13.2.1 Obstructions and Vent Dampers.
13.2.2 Vent Connector Maximum Length.
115 13.2.3 Vent Connector Exceeding Maximum Length.
13.2.4 Vent Connector Manifolds.
13.2.5 Vent Offsets.
13.2.6 Elbows in Vents.
13.2.7 Elbows in Connectors.
13.2.8 Common Vent Minimum Size.
13.2.9 Tee and Wye Fittings.
13.2.10 Tee and Wye Sizing.
13.2.11 High-Altitude Installations.
13.2.12 Connector Rise.
13.2.13 Vent Height.
13.2.14 Multistory Vent Height.
116 13.2.15 Multistory Lowest Vent and Vent Connector Sizing.
13.2.16 Multistory B Vents Required.
13.2.17 Multistory Vent Offsets and Capacity.
13.2.18 Vertical Vent Size Limitation.
13.2.19 Two-Stage/Modulating Appliances. 13.2.19.1
13.2.19.2
13.2.20 * Corrugated Chimney Liners.
13.2.21 Connections to Chimney Liners.
13.2.22 Chimneys and Vent Locations.
13.2.23 Draft Hood Conversion Accessories.
13.2.24 Vent Connector Sizing.
13.2.25 Multiple Vent and Connector Sizes.
13.2.26 Multiple Vent and Connector Sizes Permitted.
13.2.27 Interpolation.
13.2.28 Extrapolation.
13.2.29 Sizing Vents Not Covered by Tables.
13.2.30 Height Entries.
117 Annex A : Explanatory Material
135 Annex B : Sizing and Capacities of Gas Piping
145 Annex C : Suggested Method of Checking for Leakage
146 Annex D : Suggested Emergency Procedure for Gas Leaks
147 Annex E : Flow of Gas Through Fixed Orifices
153 Annex F : Sizing of Venting Systems Serving Appliances Equipped with Draft Hoods, Category I Appliances, and Appliances Listed f
164 Annex G : Recommended Procedure for Safety Inspection of an Existing Appliance Installation
168 Annex H : Indoor Combustion Air Calculation Examples
169 Annex I : Example of Combination of Indoor and Outdoor Combustion and Ventilation Opening Design
170 Annex J : Enforcement
171 Annex K : Informational References

Related products

NFPA 54/ANSI Z223.1, National Fuel Gas Code
$64.35