NFPA 52:2023

Chapter 1 Administration 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 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. Chapter 4 Facility Management 4.1 General. 4.2 Building Construction Materials. 4.3 Qualifications. 4.4 Equipment Security. 4.5 Operations and Maintenance. 4.6 CNG Training. 4.7 LNG Training. 4.8 Special Hazard Requirements. Chapter 5 Facility Fire Protection 5.1 General. 5.2 CNG Supplemental Requirements.5.3 LNG Supplemental Requirements. Chapter 6 Facility Gas Detection, Alarm, and Emergency Shutdown Systems 6.1 General. 6.2 CNG Supplemental Requirements. 6.3 LNG Supplemental Requirements. Chapter 7 Fuel Quality 7.1 CNG. 7.2 LNG. (Reserved) Chapter 8 Facility Equipment 8.1 Scope. 8.2 Application. 8.3 General. 8.4 CNG Systems. Chapter 9 Outdoor Storage 9.1 Scope. 9.2 General. (Reserved) 9.3 CNG Supplemental Requirements. 9.4 LNG Supplemental Requirements.Chapter 10 Indoor Storage 10.1 Scope. 10.2 General. (Reserved) 10.3 CNG Supplemental Requirements. 10.4 LNG Supplemental Requirements. Chapter 11 CNG Fueling 11.1 Application. 11.2 General. 11.3 CNG Dispensing. Chapter 12 Residential CNG Fueling Appliances 12.1 Application. 12.2 System Component Qualifications. 12.3 General Safety Requirements. 12.4 Installation. 12.5 Installation of PRVs. 12.6 Installation of Pressure Gauges. 12.7 Pressure Regulation. 12.8 Piping and Hose. 12.9 Testing. 12.10 Operation. 12.11 Maintenance and Inspection.Chapter 13 Nonresidential CNG Fueling Appliances 13.1 General. 13.2 Installation. 13.3 Operation. 13.4 Maintenance and Inspection. Chapter 14 LNG Fueling 14.1 Application. 14.2 General. 14.3 LNG Dispensing. 14.4 LNG Storage. 14.5 Piping Systems and Components. Chapter 15 Automotive Equipment (Onboard) 15.1 Scope. 15.2 Application. 15.3 General. 15.4 CNG Supplemental Requirements. 15.5 LNG Supplemental Requirements. Chapter 16 Automotive Fuel and Safety Systems (Onboard) 16.1 Application. 16.2 General. 16.3 CNG Engine Fuel Systems. 16.4 LNG Engine Fuel Systems.Chapter 17 Installation Requirements for ASME Tanks for LNG 17.1 Application. 17.2 General. 17.3 Containers. 17.4 Container Foundations and Supports. 17.5 Container Installation. 17.6 Automatic Product Retention Valves. 17.7 Inspection. 17.8 Testing and Purging of LNG Containers. 17.9 Piping. 17.10 Container Instrumentation. 17.11 Pressure Gauging and Control. Chapter 18 Marine Onboard (Reserved) Chapter 19 Marine Refueling (Reserved) Annex A Explanatory Material Annex B Sample Ordinance Adopting NFPA 52 Annex C Pressure Relief Devices (PRDs) Annex D Informational References

This code shall apply to the design, installation, opera‐ tion, and maintenance of compressed natural gas (CNG) and liqueƒed natural gas (LNG) engine fuel systems on vehicles of all types and for fueling vehicle (dispensing) systems and facili‐ ties, and associated storage, including the following: (1) Original equipment manufacturers (OEMs) (2) Final-stage vehicle integrator/manufacturer (FSVIM) (3) Vehicle fueling (dispensing) systems.