NFPA 12:2025

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Retroactivity. 1.4 Units. 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. 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

This standard contains minimum requirements for carbon dioxide fire-extinguishing systems.