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NFPA 122:2023


The latest, up-to-date edition.

Standard for Fire Prevention and Control in Metal/Nonmetal Mining and Metal Mineral Processing Facilities
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Chapter 1 Administration
1.1 Scope.
1.2 Purpose
1.3 Application
1.4 Retroactivity.
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 Denitions
3.1 General.
3.2 NFPA Ofƒcial Deƒnitions
3.3 General Deƒnitions
Chapter 4 General
4.1 General.
4.2 Housekeeping.
4.3 Ignition Source Control.
4.4 Hot Work
4.5 Maintenance.
4.6 Fire Protection Equipment Inspection,
Maintenance, and Testing.
4.7 Training.
4.8 Ignitible (Flammable and Combustible) Liquid
Handling and Storage.
4.9 Vehicle Refueling.
4.10 Noncombustible Material.
Chapter 5 Fire Risk Assessment and Risk Reduction
5.1 Fire Risk Assessment.
5.2 Risk Reduction.
Chapter 6 Fire Detection and Suppression
6.1 Portable Fire Extinguishers.
6.2 Hand Hose Line Systems.
6.3 Fire Detection.
6.4 Fire Suppression Equipment.
Chapter 7 Fire Protection for Diesel-Powered
Equipment in Underground Mines
7.1 Equipment Modiƒcation.
7.2 Equipment Inspection and Maintenance.
7.3 Portable Fire Extinguishers.
7.4 Fixed Suppression Systems.
Chapter 8 Transfer of Ignitible (Flammable or
Combustible) Liquids in Underground
8.1 Fire Risk Assessment.
8.2 Proximity of Surface Ignitible (Flammable and
Combustible) Liquid Storage to Underground
8.3 Surface-to-Underground Transfer
8.4 Underground Transfer
Chapter 9 Flammable Liquid Storage in
Underground Mines
9.1 General
9.2 Flammable Liquid Containers
9.3 Small Flammable Liquid Storage Areas
9.4 Large Flammable Liquid Storage Areas
9.5 Dispensing Flammable Liquids
Chapter 10 Combustible Liquid Storage in
Underground Mines
10.1 General
10.2 Combustible Liquid Containers and Tanks
10.3 Atmospheric Tanks
10.4 Low-Pressure Tanks
10.5 Pressure Vessels
10.6 Venting Atmospheric and Low-Pressure
Combustible Liquid Storage Tanks
10.7 Additional Considerations
10.8 Small Combustible Liquid Storage Areas
10.9 Large Combustible Liquid Storage Areas
10.10 Dispensing Combustible Liquids
Chapter 11 Fire Suppression for Ignitible (Flammable
or Combustible) Liquid Storage Areas in
Underground Mines
11.1 Portable Fire Extinguishers– 18
11.2 Hand Hose Line Systems
11.3 Fire Suppression Systems
Chapter 12 Fire Prevention and Fire Protection of
Surface Mining Equipment
12.1 General
12.2 Fire Prevention
12.3 Fire Protection
Chapter 13 Fire Protection of Surface Metal Mineral
Processing Plants
13.1 General
13.2 Emergency Response and Manual Fireƒghting.
13.3 Construction
13.4 Lightning Protection
13.5 Egress and Exiting
13.6 Yard Hydrant Systems
13.7 Water Supply and Water Distribution Systems
13.8 Ignitible (Flammable and Combustible)
13.9 Compressed Gases
13.10 Oxidizers
13.11 Belt Conveyors
13.12 Rubber- and Plastic-Lined Equipment
13.13 Plastic Equipment (Other than Spirals)
13.14 Gravimetric Ore Concentration Plants Using
Combustible Spiral Concentrators
13.15 Hydraulic Fluids and Lubricating Oil Systems
13.16 Thermal Oil Heating Systems
13.17 Fuel-Fired Equipment.
13.18 Electrical and Control Equipment Spaces
13.19 Battery Charging Installations
13.20 Hydro-Metallurgical Solvent Extraction (SX)
13.21 New Solvent Extraction (SX) Facilities
Chapter 14 Conveyors
14.1 General Requirements
14.2 Underground Conveyors
14.3 Overland Conveyors
14.4 Belowgrade Reclaim Conveyors
14.5 Manual Fireƒghting
14.6 Automatic Fire Suppression Systems at the Belt
Chapter 15 Ventilation in Underground Mines
15.1 Ventilation Plan
15.2 Mine Fans.
15.3 Oxygen-Deƒciency Testing
15.4 Ventilation Doors
15.5 Unventilated Areas
15.6 Shaft Mines
15.7 Underground Shops
15.8 Air Courses and Trolley Haulage Systems
15.9 Belt Air Course Ventilation
15.10 Gas Drainage for Reduction of Combustible
Gases Before Mining. (Reserved)
15.11 Refrigeration Systems. (Reserved) .
Chapter 16 Emergency Preparedness and Response
16.1 Emergency Preparedness and Response Plan
16.2 Emergency Communications2
16.3 Underground Operations
16.4 Plan Review and Validation
Annex A Explanatory Material
Annex B Fire Risk Assessment
Annex C Informational References

This standard covers minimum requirements for safe‐guarding life and property against ƒre and related hazards associated with metal and nonmetal underground and surface mining and metal mineral processing plants.

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