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NFPA 52: Vehicular Natural Gas Fuel Systems Code, 2026
- Important Notices and Disclaimers
- Additional Important Notices and Disclaimers
- Chapter 1 Administration [Go to Page]
- 1.1 Scope.
- 1.2 Purpose.
- 1.3 Retroactivity.
- 1.4 Alternate Provisions.
- 1.5 Training.
- 1.6 Units.
- 1.7 Enforcement.
- Chapter 2 Referenced Publications [Go to Page]
- 2.1 General.
- 2.2 NFPA Publications.
- 2.3 Other Publications.
- 2.4 References for Extracts in Mandatory Sections.
- Chapter 3 Definitions [Go to Page]
- 3.1 General.
- 3.2 NFPA Official Definitions.
- 3.3 General Definitions.
- Chapter 4 CNG Facility Operations, Maintenance, and Management [Go to Page]
- 4.1 General.
- 4.2 Reserved.
- 4.3 Qualifications.
- 4.4 Equipment Security.
- 4.5 Operations and Maintenance.
- 4.6 CNG Training.
- 4.7 Special Hazard Requirements.
- 4.8 Validation.
- Chapter 5 Facility Fire Protection [Go to Page]
- 5.1 General.
- 5.2 CNG Supplemental Requirements. (Reserved)
- Chapter 6 CNG Facility Gas Detection, Alarm, and Emergency Shutdown Systems [Go to Page]
- 6.1 General.
- 6.2 CNG Supplemental Requirements.
- 6.3 Emergency Shutdown System.
- Chapter 7 Fuel Quality and Properties [Go to Page]
- 7.1 CNG.
- 7.2 LNG. (Reserved)
- Chapter 8 CNG Facility Equipment Components [Go to Page]
- 8.1 Scope.
- 8.2 Application.
- 8.3 General.
- 8.4 Design and Construction of Containers.
- 8.5 Reserved.
- 8.6 ASME Compliance.
- 8.7 Pressure Gauges.
- 8.8 Valves and Related Components.
- 8.9 Piping, Tubing, and Fittings.
- 8.10 System Testing.
- 8.11 Electrical Equipment. (Reserved)
- Chapter 9 CNG Major Fueling Equipment [Go to Page]
- 9.1 Application.
- 9.2 General.
- 9.3 CNG Systems.
- 9.4 Outdoor Non-Public Fueling from Transport Vehicles Including Marine Vessels.
- Chapter 10 Outdoor Installation of CNG Station Equipment and Dispensing [Go to Page]
- 10.1 Scope.
- 10.2 General. (Reserved)
- 10.3 CNG Supplemental Requirements.
- 10.4 CNG Dispensing.
- 10.5 Siting.
- 10.6 Compression, Storage, and Dispensing Equipment Located Outdoors.
- 10.7 Electrical CNG Installations.
- 10.8 Signage.
- 10.9 CNG. (Reserved)
- Chapter 11 Indoor Installation of CNG and LNG Station Equipment and Dispensing [Go to Page]
- 11.1 Scope.
- 11.2 General. (Reserved)
- 11.3 CNG Supplemental Requirements.
- 11.4 CNG and LNG Building Construction.
- 11.5 Ventilation.
- 11.6 Building Shutoff Valves.
- 11.7 Reserved.
- 11.8 Residential Storage. (Reserved)
- 11.9 LNG Supplemental Requirements.
- Chapter 12 CNG (Reserved)
- Chapter 13 Residential CNG Fueling Appliances [Go to Page]
- 13.1 Application.
- 13.2 System Component Qualifications.
- 13.3 General Safety Requirements.
- 13.4 Installation.
- 13.5 Installation of PRVs.
- 13.6 Installation of Pressure Gauges.
- 13.7 Pressure Regulation.
- 13.8 Piping and Hose.
- 13.9 Testing.
- 13.10 Operation.
- 13.11 Maintenance and Inspection.
- Chapter 14 Nonresidential CNG Fueling Appliances [Go to Page]
- 14.1 General.
- 14.2 Installation.
- 14.3 Operation.
- 14.4 Maintenance and Inspection.
- Chapter 15 LNG Facility Management [Go to Page]
- 15.1 Scope. (Reserved)
- 15.2 General. (Reserved)
- 15.3 Qualifications. (Reserved)
- 15.4 LNG Facility Maintenance.
- 15.5 Operations and Maintenance.
- 15.6 Operating Procedures Manual.
- 15.7 LNG Training.
- Chapter 16 LNG Site Safety, Fire Protection, and Gas Detection [Go to Page]
- 16.1 Application.
- 16.2 Fire Protection, Safety, and Security.
- 16.3 Reserved.
- 16.4 Ignition Source Control.
- 16.5 Vehicles.
- 16.6 Electrical Classifications.
- 16.7 Signage.
- 16.8 Emergency Response Measures.
- 16.9 LNG Supplemental Requirements.
- 16.10 Cargo Transport Unloading.
- Chapter 17 LNG Fuel Quality (Reserved)
- Chapter 18 LNG Fueling Station Equipment (Reserved)
- Chapter 19 LNG Siting and Construction Requirements [Go to Page]
- 19.1 General.
- 19.2 Siting.
- 19.3 Reserved.
- 19.4 Reserved.
- 19.5 Reserved.
- 19.6 LNG Supplemental Requirements.
- 19.7 Separation Distances.
- Chapter 20 LNG Fueling [Go to Page]
- 20.1 Application.
- 20.2 General.
- 20.3 LNG Dispensing.
- 20.4 LNG Storage.
- 20.5 Piping Systems and Components.
- Chapter 21 Installation Requirements for ASME Tanks for LNG [Go to Page]
- 21.1 Application.
- 21.2 General.
- 21.3 Containers.
- 21.4 Container Foundations and Supports.
- 21.5 Container Installation.
- 21.6 Automatic Product Retention Valves.
- 21.7 Inspection.
- 21.8 Testing and Purging of LNG Containers.
- 21.9 Piping.
- 21.10 Container Instrumentation.
- 21.11 Pressure Gauging and Control.
- Chapter 22 LNG (Reserved)
- Chapter 23 LCNG Requirements (Reserved)
- Chapter 24 Automotive Equipment (Onboard) [Go to Page]
- 24.1 Scope.
- 24.2 Application.
- 24.3 General.
- 24.4 CNG Supplemental Requirements.
- 24.5 LNG Supplemental Requirements.
- Chapter 25 Automotive Fuel and Safety Systems (Onboard) [Go to Page]
- 25.1 Application.
- 25.2 General.
- 25.3 CNG Engine Fuel Systems.
- 25.4 LNG Engine Fuel Systems.
- Chapter 26 Reserved
- Chapter 27 Reserved
- Chapter 28 Marine Onboard (Reserved)
- Chapter 29 Marine Refueling (Reserved)
- Annex A Explanatory Material
- Annex B Sample Ordinance Adopting NFPA 52
- Annex C Pressure Relief Devices (PRDs)
- Annex D Informational References [Go to Page]
