Stay informed on the latest carbon dioxide (CO2) fire extinguishing systems for safer and more efficient design, installation, and maintenance.
Coverage in NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, addresses carbon dioxide total flooding systems, local application systems, hand hose line systems, standpipe systems, and mobile supplies for the full range of systems used for industrial and marine fire protection.
Up to date with code references in NFPA 4, Standard for Integrated Fire Protection and Life Safety System Testing, this standard presents the latest consensus-based rules for the design, installation, and maintenance of both high-pressure and low-pressure CO2 extinguishing systems and is essential for fire protection designers and installers, engineers, facility managers, and inspectors.
Updates to the 2025 edition of NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, include:
A new table for extended discharge for enclosed recirculating, rotating electrical equipment
Added provisions to assist the user in calculating times for values not covered by the document
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. 3.4 Special Definitions.
Chapter 4 General Information
4.1 Restrictions for Normally Occupied Enclosures. 4.2 Carbon Dioxide Use and Limitations. 4.3 Personnel Safety. 4.4 Specifications, Plans, and Approvals. 4.5 Detection, Actuation, and Control. 4.6 Carbon Dioxide Supply. 4.7 Distribution Systems. 4.8 Inspection, Maintenance, and Instruction.
Chapter 5 Total Flooding Systems
5.1 General Information. 5.2 Hazard Specifications. 5.3 Carbon Dioxide Requirements for Surface Fires. 5.4 Carbon Dioxide Requirements for Deep-Seated Fires. 5.5 Distribution System. 5.6 Venting Consideration.
Chapter 6 Local Application Systems
6.1 General Information. 6.2 Hazard Specifications. 6.3 Carbon Dioxide Requirements. 6.4 Rate-by-Area Method. 6.5 Rate-by-Volume Method. 6.6 Distribution System.
Chapter 7 Hand Hose Line Systems
7.1 General Information. 7.2 Hazard Specifications. 7.3 Location and Spacing. 7.4 Carbon Dioxide Requirements. 7.5 Equipment Specifications. 7.6 Training.
Chapter 8 Standpipe Systems and Mobile Supply
8.1 General Information. 8.2 Hazard Specifications. 8.3 Standpipe Requirements. 8.4 Mobile Supply Requirements. 8.5 Training.
Chapter 9 Marine Systems
9.1 Special Definitions. 9.2 General. 9.3 System Requirements. 9.4 Inspection and Maintenance.
Annex A Explanatory Material Annex B Examples of Hazard Protection Annex C Pipe and Orifice Size Determination Annex D Total Flooding Systems Annex E Surface Fires Annex F Local Application Carbon Dioxide Systems Annex G General Information on Carbon Dioxide Annex H Informational References
Stay informed on the latest carbon dioxide (CO2) fire extinguishing systems for safer and more efficient design, installation, and maintenance.
Coverage in NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, addresses carbon dioxide total flooding systems, local application systems, hand hose line systems, standpipe systems, and mobile supplies for the full range of systems used for industrial and marine fire protection.
Up to date with code references in NFPA 4, Standard for Integrated Fire Protection and Life Safety System Testing, this standard presents the latest consensus-based rules for the design, installation, and maintenance of both high-pressure and low-pressure CO2 extinguishing systems and is essential for fire protection designers and installers, engineers, facility managers, and inspectors.
Updates to the 2025 edition of NFPA 12, Standard on Carbon Dioxide Extinguishing Systems, include:
A new table for extended discharge for enclosed recirculating, rotating electrical equipment
Added provisions to assist the user in calculating times for values not covered by the document
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. 3.4 Special Definitions.
Chapter 4 General Information
4.1 Restrictions for Normally Occupied Enclosures. 4.2 Carbon Dioxide Use and Limitations. 4.3 Personnel Safety. 4.4 Specifications, Plans, and Approvals. 4.5 Detection, Actuation, and Control. 4.6 Carbon Dioxide Supply. 4.7 Distribution Systems. 4.8 Inspection, Maintenance, and Instruction.
Chapter 5 Total Flooding Systems
5.1 General Information. 5.2 Hazard Specifications. 5.3 Carbon Dioxide Requirements for Surface Fires. 5.4 Carbon Dioxide Requirements for Deep-Seated Fires. 5.5 Distribution System. 5.6 Venting Consideration.
Chapter 6 Local Application Systems
6.1 General Information. 6.2 Hazard Specifications. 6.3 Carbon Dioxide Requirements. 6.4 Rate-by-Area Method. 6.5 Rate-by-Volume Method. 6.6 Distribution System.
Chapter 7 Hand Hose Line Systems
7.1 General Information. 7.2 Hazard Specifications. 7.3 Location and Spacing. 7.4 Carbon Dioxide Requirements. 7.5 Equipment Specifications. 7.6 Training.
Chapter 8 Standpipe Systems and Mobile Supply
8.1 General Information. 8.2 Hazard Specifications. 8.3 Standpipe Requirements. 8.4 Mobile Supply Requirements. 8.5 Training.
Chapter 9 Marine Systems
9.1 Special Definitions. 9.2 General. 9.3 System Requirements. 9.4 Inspection and Maintenance.
Annex A Explanatory Material Annex B Examples of Hazard Protection Annex C Pipe and Orifice Size Determination Annex D Total Flooding Systems Annex E Surface Fires Annex F Local Application Carbon Dioxide Systems Annex G General Information on Carbon Dioxide Annex H Informational References