Home  >  Codes and Standards  >  Complete List of Codes and Standards  >  NFPA 69: Standard on Explosion Prevention Systems

NFPA 69, Standard on Explosion Prevention Systems

2019 NFPA 69 Standard - Current Edition
In purchasing digital access through a PDF or subscription service, you are purchasing a single-user license to access content only by the named account holder. Certain restrictions apply.

NFPA Members save an additional 10%.

Item #: NFPA_69
Price: $0.00
Edition:
Digital Access with NFPA LiNK® Plans starting at $11.99/month
Formats Available:












Spanish Formats Available:

Quantity:
  • Description

    Apply NFPA 69 to help prevent explosions due to combustible dust particles, gases, or vapors.

    Combustible dust, gases, and vapors produced in industrial settings can pose a significant safety hazard. NFPA 69, Standard on Explosion Prevention Systems, offers definitive guidance on explosion protection and prevention systems.

    This document is applicable to woodworking, grain processing (including sugar), and machining facilities, where combustible dust can spark explosions. It also covers facilities in which flammable liquids are used or petrochemical processing takes place -- and explosions due to combustible gases or vapors are a concern.

    Protected equipment includes pipes, ductwork, and dust collection systems.

    Systems for explosion prevention, explosion isolation, oxidant concentration control, fuel concentration control, and ignition control are all designed in accordance with NFPA 69, which is also compatible with the terminology of NFPA 3, Recommended Practice for Commissioning and Integrated Testing of Fire Protection and Life Safety Systems, and other standards.

    Essential for system designers, safety officers, insurers, municipal and state inspectors, and other professionals, NFPA 69 provides valuable insight on:

    • Installing an explosion isolation valve or system
    • Designing equipment to contain an explosion
    • Controlling your process to help ensure an explosive atmosphere doesn't develop
    • Installing an explosion suppression system
    • Controlling ignition sources in your process before an explosion occurs

    Changes in the 2019 edition include:

    • A revised adjustment for Limiting Oxygen Concentration (LOC) values obtained in flammability tubes, reconfirming a change made by a TIA
    • New requirements that consider the concentration variation with time and location within the protected enclosure -- as well as variations in operating conditions and material loadings -- when using the combustible concentration reduction method of explosion prevention
    • A new section on Safety Instrumented Systems (SIS), along with a requirement that explosion prevention system controls installed after November 5, 2021 be implemented as an SIS
    • Added annex material that provides example calculations on how to estimate the LOC for a fuel or a fuel mixture

    Follow the field's best guidance for the prevention and control of deflagrations in the latest edition of NFPA 69. (Print, 90 pp., 2019)

  • Table of Contents (2019 Current Edition)

    NFPA® 69 Standard on Explosion Prevention Systems, 2019 Edition

    Chapter 1 Administration
    1.1 Scope.
    1.2 Purpose.
    1.3 Application.
    1.4 Retroactivity.
    1.5 Equivalency.
    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 General Requirements
    4.1 Goal.
    4.2 Objectives.
    4.3 Compliance Options.
    Chapter 5 Performance-Based Design Option
    5.1 General Requirements.
    5.2 Performance Criteria.
    Chapter 6 General Prescriptive Requirements
    6.1 Methods.
    6.2 Limitations.
    6.3 Factors to Be Considered.
    6.4 Plans.
    6.5 System Acceptance.
    6.6 Inspection and Maintenance.
    6.7 Housekeeping.
    Chapter 7 Deflagration Prevention by Oxidant Concentration Reduction
    7.1 Application.
    7.2 Design and Operating Requirements.
    7.3 Purge Gas Sources.
    7.4 Purge Gas Conditioning.
    7.5 Piping Systems.
    7.6 Application of Purge Gas at Points of Use.
    7.7 Instrumentation.
    Chapter 8 Deflagration Prevention by Combustible Concentration Reduction
    8.1 Application.
    8.2 Basic Design Considerations.
    8.3 Design and Operating Requirements.
    8.4 Instrumentation.
    Chapter 9 Predeflagration Detection and Control of Ignition Sources
    9.1 Application.
    9.2 Limitations.
    9.3 Optical Sensing System and Gas Sensing System Design Considerations.
    9.4 Testing.
    9.5 Protection System Design and Operation.
    9.6 System Manufacturer'sManufacturer’s Additional Responsibilities.
    9.7 Actuation of Other Devices and Systems.
    9.8 Process Shutdown.
    Chapter 10 Deflagration Control by Suppression
    10.1 Application.
    10.2 Limitations.
    10.3 Personnel Safety.
    10.4 Basic Design Considerations.
    10.5 Control Panels.
    10.6 Detection Devices.
    10.7 Electrically Operated Actuating Devices.
    10.8 Suppressant and Suppressant Storage Containers.
    Chapter 11 Deflagration Control by Active Isolation
    11.1 Application.
    11.2 Isolation Techniques.
    11.3 Personnel Safety.
    11.4 Basic Design and Operation.
    11.5 Detection Devices.
    11.6 Electrically Operated Actuating Devices.
    11.7 Control Panels.
    Chapter 12 Deflagration Control by Passive Isolation
    12.1 Application.
    12.2 Passive Isolation Techniques.
    Chapter 13 Deflagration Control by Pressure Containment
    13.1 Application.
    13.2 Design Limitations.
    13.3 Design Bases.
    13.4 Maintenance.
    13.5 Threaded Fasteners.
    13.6 Inspection After a Deflagration.
    Chapter 14 Passive Explosion Suppression Using Expanded Metal Mesh or Polymer Foams
    14.1 Applications.
    14.2 Foam and Mesh Requirements.
    14.3 Expanded Metal Mesh and Polymer Foam Explosion Suppression Testing.
    14.4 Expanded Metal Mesh or Polymer Foam Installations.
    14.5 Expanded Metal Mesh or Polymer Foam Maintenance and Replacement.
    Chapter 15 Installation, Inspection, and Maintenance of Explosion Prevention Systems
    15.1 General.
    15.2 Installation.
    15.3 Mechanical Installation.
    15.4 Agent, Agent Storage Containers, Automatic Fast-Acting Valves, Flame Arresters, and Flame Front Diverters.
    15.5 Electrical Installation.
    15.6 System Acceptance.
    15.7 Inspection.
    15.8 Procedures Following System Actuation.
    15.9 Recordkeeping.
    15.10 Personnel Safety and Training
    15.11 Management of Change.
    15.12 Maintenance.
    Annex A Explanatory Material
    Annex B Control of Flammable Gas Mixtures by Oxidant Concentration Reduction and Combustible Concentration Reduction
    Annex C Limiting Oxidant Concentrations
    Annex D Ventilation Calculations
    Annex E Purging Methods
    Annex F Flame Arresters
    Annex G Deflagration Containment Calculation Method for Two Interconnected Vessels
    Annex H Informational References
  • Prior Editions

    Prevent deflagration explosions due to combustible dust particles, gases or vapors with NFPA 69.

    Combustible dust, gases and vapors produced in industrial settings can pose a significant safety hazard. NFPA 69, Standard on Explosion Prevention Systems offers definitive guidance on explosion protection and prevention systems.

    This document is applicable to woodworking, grain processing (including sugar) and machining facilities, where combustible dust can spark explosions. It also covers facilities in which flammable liquids are used or petrochemical processing takes place -- and explosions due to combustible gases or vapors are a concern.

    NFPA 69 has widespread applicability. Among the equipment protected are pipes, ductwork, vents, dust collection systems and granaries. In addition, systems for explosion prevention, explosion isolation, oxidant concentration control, fuel concentration control and ignition control are all designed in accordance with this standard.

    The 2014 edition of NFPA 69 features:

    • Easier-to-understand explanations
    • Compatibility with NFPA 3, Recommended Practice for Commissioning and Integrated Testing of Fire Protection and Life Safety Systems terminology and other standards
    • Updated references and abstracts
    • New requirements for flow-actuated flap valves
    • A new annex on deflagration containment for two interconnected vessels

    It also provides valuable insight on:

    • Installing an explosion isolation valve or system
    • Designing equipment to contain an explosion
    • Controlling your process to ensure an explosive atmosphere doesn't develop
    • Installing an explosion suppression system
    • Controlling ignition sources in your process before an explosion occurs

    NFPA 69 is an essential resource for system designers, safety officers, insurers, municipal and state inspectors, and other professionals. Order your copy today to get the best guidance in the field on prevention and control of deflagrations. (Softbound, 79 pp., 2014)

     

    Interested in other editions of NFPA 69? Use the drop down menu above to select the edition year you need.

  • NFPA PDF Products

    If you purchased a PDF, licensed PDFs can be accessed immediately. Instructions can be found in your order confirmation.

    Effective with the annual 2020 code cycle, NFPA® will no longer offer access to the PDF format as a choice for new editions of codes and standards, handbooks, or other reference titles. Existing PDFs will remain in-market and will still be accessible in our National Fire Codes® Subscription Service (NFCSS™). For more information about the different format options available to access essential code and standard content you need, click here.

  • Historical Editions

    Previous editions of NFPA® documents are available for sale. Please see applicable NFPA codes and standards product pages to confirm which editions are available for purchase. If you have any questions, contact NFPA Customer Support at 1-800-344-3555 or nfpa.org/customerservice.