2019 NFPA 52 Code - Current Edition
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  • Description

    Better ensure the safe and efficient use of CNG and LNG fuel systems and mitigate fire and explosion hazards with NFPA 52.

    With the steady rise in the use of cost-effective natural gas vehicles, it's critical to have access to the complete range of requirements for designing, installing, operating, and maintaining compressed natural gas (CNG) and liquefied natural gas (LNG) engine fuel systems and dispensing systems. NFPA 52, Vehicular Natural Gas Fuel Systems Code, offers in-depth instruction for helping to safeguard people and installations in a user-friendly format that’s easy to navigate and comprehend.

    An essential for designers, engineers, maintenance professionals, facilities managers, contractors, and authorities having jurisdiction (AHJs), NFPA 52 covers CNG and LNG systems on all types of vehicles and applies to facilities with LNG storage in containers of 100,000 gallons or less. Additional subject areas include:

    • Fuel compression, processing, storage, and dispensing systems
    • CNG residential fueling facilities (RFF-CNGs)
    • CNG nonresidential fueling facilities
    • LNG fueling facilities
    • LNG fire protection
    • Installation of ASME tanks for LNG
    • LNG and CNG on commercial marine vessels and pleasure craft

    The 2019 NFPA 52, Vehicular Natural Gas Fuel Systems Code, is consistent with CSA Group MGV 5.1 and the International Fuel Gas Code. 

    Extensive revisions and additions to the new edition include:

    • Reorganized and expanded text to address cutting-edge vehicle fueling applications (VFAs)
    • A new chapter on nonresidential CNG fueling applications
    • Updated terminology to align with current definitions and VFA changes
    • Insertion of supplemental content for improved clarity
    • Removal of material to eliminate redundancy with the CSA Group NGV 5.1 standard

    NFPA 52 is a reliable reference book for natural gas engine fuel system requirements.

    Get the resource you need to increase safety and accuracy working with CNG and LNG fuel systems. Place an order for the 2019 edition of NFPA 52, Vehicular Natural Gas Fuel Systems Code, today. (Print. 78 pp., 2019)

     

    Interested in other editions of the NFPA 52? Use the drop down menu above to select the edition year you need.

  • Table of Contents (2019 Current Edition)

    NFPA® 52 Vehicular Natural Gas Fuel Systems Code, 2019 Edition

    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 General.
    7.2 CNG.
    7.3 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 Reserved
    Chapter 19 Reserved
    Annex A Explanatory Material
    Annex B Sample Ordinance Adopting NFPA 52
    Annex C Pressure Relief Devices (PRDs)
    Annex D Informational References
  • Prior Editions

    NFPA 52, Vehicular Natural Gas Fuel Systems Code provides easy, one-stop access to requirements for the safety and integrity of CNG and LNG fuel systems.

    Because of the cost advantage of natural gas over petroleum-based liquid fuels, increasing numbers of natural gas-fueled vehicles are being put into service. As a result, NFPA 52 is more widely referenced than ever before by designers, engineers, installers, contractors, maintenance professionals, facilities managers, and Authorities Having Jurisdiction (AHJs).

    Renamed and completely reorganized, the 2016 edition presents a user-friendly format and greater consistency with CSA Group NGV 5.1 and the International Fuel Gas Code.

    Users depend on NFPA 52 for the correct design, installation, operation, and maintenance of Compressed Natural Gas (CNG) and Liquefied Natural Gas (LNG) engine fuel systems and dispensing systems. The 2016 edition is reorganized for easy access to requirements. New and revised definitions harmonize the Code with the new CSA Group NGV 5.1 Standard for residential fueling appliances, and also provide consistency with the International Fuel Gas Code (IFGC).

    NFPA 52 is your one-stop source for requirements addressing:

    • CNG and LNG systems on all vehicle types
    • Fuel compression, processing, storage, and dispensing systems
    • CNG residential fueling facilities (RFF-CNGs)
    • LNG fueling facilities
    • LNG fire protection
    • Installation of ASME tanks for LNG
    • LNG and CNG on Commercial Marine Vessels and Pleasure Craft

    NFPA 52 applies to facilities with LNG storage in containers of 70,000 gallons or less. (Softbound, 78 pp., 2016)

     

    Interested in other editions of the NFPA 52? Use the drop down menu above to select the edition year you need.

  • How the NFPA Handbooks Differ from Codes and Standards

    THE NFPA HANDBOOKS DIFFER FROM CODES AND STANDARDS

    Ever wonder what the difference is between an NFPA® handbook and a code or standard? We’re glad you asked.

    NFPA codes and standards both provide requirements for achieving outcomes. Handbooks take a deeper dive, providing the full text of a code or standard as well as expert commentary and features such as graphics, decision trees, testing procedures, case studies, sample forms and checklists, and other helpful aids to give a better understanding of the reasoning behind the requirements and how to apply them.

    JUST REMEMBER:

    • A code or standard is a framework—a set of rules to follow with a goal to achieve a certain result
    • A handbook is a connector—linking requirements to application by helping you understand the reasoning behind a code or standard

    The simplest way to think about it is that codes and standards list the technical requirements while handbooks explain those requirements to clarify how to apply them.

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  • Also in NFPA 52: Vehicular Gaseous Fuel Systems Code