2020 NFPA 55 Code - Current Edition
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  • Description

    Help ensure industrial safety around compressed gases and cryogenic fluids to better protect from physiological, over-pressurization, explosion, and flammability hazards. NFPA 55, Compressed Gases and Cryogenic Fluids Code, 2020 edition, offers comprehensive requirements for safer installation, storage, use, and handling of industrial gases with new definitions and additions to represent the latest industry standards and procedures.

  • Table of Contents (2020 Current Edition)

    NFPA® 55 Compressed Gases and Cryogenic Fluids Code, 2020 Edition

    Chapter 1 Administration
    1.1 Scope.
    1.2 Purpose.
    1.3 Application.
    1.4 Retroactivity.
    1.5 Equivalency.
    1.6 Units and Formulas.
    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 General Requirements
    4.1 Permits.
    4.2 Emergency Plan.
    4.3 Facility Closure.
    4.4 Out-of-Service Stationary Bulk Gas Systems.
    4.5 Management Plan and Hazardous Materials Documentation.
    4.6 Release of Hazardous Materials.
    4.7 Personnel Training.
    4.8 Emergency Response Liaison.
    4.9 Ignition Source Controls.
    4.10 Signs.
    4.11 Protection from Vehicular Damage.
    4.12 Building Construction Materials.
    Chapter 5 Classification of Hazards
    5.1 Hazardous Materials Classification.
    Chapter 6 Building-Related Controls
    6.1 General.
    6.2 Control Areas.
    6.3 Occupancy Protection Levels.
    6.4 Gas Rooms.
    6.5 Hydrogen Gas Rooms.
    6.6 Detached Buildings.
    6.7 Weather Protection.
    6.8 Electrical Equipment.
    6.9 Employee Alarm System.
    6.10 Explosion Control.
    6.11 Fire Protection Systems.
    6.12 Lighting.
    6.13 Hazard Identification Signs.
    6.14 Spill Control, Drainage, and Secondary Containment.
    6.15 Shelving.
    6.16 Vent Pipe Termination.
    6.17 Ventilation.
    6.18 Gas Cabinets.
    6.19 Exhausted Enclosures.
    6.20 Source Valve.
    Chapter 7 Compressed Gases
    7.1 General.
    7.2 Storage.
    7.3 Use and Handling.
    7.4 Medical Gas Systems.
    7.5 Corrosive Gases.
    7.6 Flammable Gases.
    7.7 Oxidizing Gases.
    7.8 Pyrophoric Gases.
    7.9 Toxic and Highly Toxic Gases.
    7.10 Unstable Reactive Gases (Nondetonable).
    Chapter 8 Cryogenic Fluids
    8.1 General.
    8.2 Containers — Design, Construction, and Maintenance.
    8.3 Pressure Relief Vent Piping.
    8.4 Marking.
    8.5 Security.
    8.6 Separation from Hazardous Conditions.
    8.7 Electrical Wiring and Equipment.
    8.8 Service and Repair.
    8.9 Unauthorized Use.
    8.10 Leaks, Damage, and Corrosion.
    8.11 Lighting.
    8.12 Storage.
    8.13 Use and Handling.
    Chapter 9 Bulk Oxygen Systems
    9.1 General.
    9.2 Materials of Construction.
    9.3 Location of Bulk Oxygen Systems.
    9.4 System Fabrication.
    9.5 Inspection.
    Chapter 10 Gas Hydrogen Systems
    10.1 Applicability.
    10.2 General.
    10.3 Hydrogen Systems Having Quantities Greater Than the MAQ.
    10.4 Bulk Gaseous Hydrogen System.
    Chapter 11 Bulk Liquefied Hydrogen Systems
    11.1 General.
    11.2 Design of Bulk Liquefied Hydrogen Systems.
    11.3 Location of Bulk Liquefied Hydrogen Systems.
    11.4 Design Considerations at Specific Locations.
    11.5 Cargo Transport Unloading.
    Chapter 12 Gas Generation Systems
    12.1 General.
    12.2 Corrosive Gases. (Reserved)
    12.3 Flammable Gases — Cryogenic. (Reserved)
    12.4 Oxidizing Gases. (Reserved)
    12.5 Other Gases. (Reserved)
    12.6 Pyrophoric Gases. (Reserved)
    12.7 Toxic and Highly Toxic Gases. (Reserved)
    12.8 Unstable Reactive Gases. (Reserved)
    Chapter 13 Carbon Dioxide Systems
    13.1 General.
    13.2 Uninsulated Carbon Dioxide Compressed Gas Systems. (Reserved)
    13.3 Insulated Carbon Dioxide Compressed Gas Systems.
    13.4 Insulated Liquid Carbon Dioxide Systems.
    13.5 Materials of Construction.
    13.6 Operating Instructions.
    13.7 Small Insulated Liquid Carbon Dioxide Indoor Systems.
    13.8 Small Insulated Liquid Carbon Dioxide Outdoor Systems.
    13.9 Large Indoor Insulated Liquid Carbon Dioxide Systems. (Reserved)
    13.10 Large Outdoor Insulated Liquid Carbon Dioxide Systems.
    13.11 Carbon Dioxide Beverage Systems.
    Chapter 14 Storage, Handling, and Use of Ethylene Oxide for Sterilization and Fumigation
    14.1 General.
    14.2 Receiving and Unloading Ethylene Oxide Containers.
    14.3 Storage of Ethylene Oxide.
    14.4 Piping Systems.
    14.5 Gas Dispensing Areas.
    14.6 Operations.
    14.7 Electrical Installation.
    14.8 Sterilizer Construction.
    14.9 Disposal and Emissions.
    14.10 Maintenance.
    14.11 Construction.
    14.12 Fire Protection.
    Chapter 15 Acetylene Cylinder Charging Plants
    15.1 General.
    15.2 Location.
    15.3 Building-Related Controls.
    15.4 Design, Installation, and Testing.
    15.5 Process Operations.
    15.6 Maintenance. (Reserved)
    15.7 Special Problems — Raw Materials.
    Chapter 16 Liquid Nitrous Oxide Systems
    16.1 General.
    16.2 Location of Bulk Nitrous Oxide Systems.
    16.3 Container Design.
    16.4 Container Installation.
    16.5 Materials of Construction.
    16.6 Vaporizers and Heaters.
    16.7 Pumps.
    16.8 Strainers and Filters.
    16.9 Flow Meters.
    16.10 Cleaning.
    16.11 Maintenance Procedures.
    16.12 Small Insulated Liquid Nitrous Oxide Indoor Systems. (Reserved)
    Chapter 17 Cryogenic Fluid Central Supply Systems for Health Care Facilities
    17.1 General.
    17.2 Cryogenic Fluid Central Supply Systems Installation.
    17.3 Cryogenic Fluid Central Supply Systems Operation.
    17.4 Main Supply System.
    17.5 Reserve Supply System.
    17.6 Cryogenic Fill System.
    17.7 Vaporizers.
    17.8 High-Pressure Manifolds.
    17.9 Pressure Control Devices.
    17.10 Pressure Relief Devices.
    17.11 Tubing and Valves.
    17.12 Alarms.
    Annex A Explanatory Material
    Annex B Attended Operations
    Annex C Physical Properties of Hydrogen
    Annex D Significant Properties of Ethylene Oxide
    Annex E Explanation of Methodology Utilized to Develop Separation Distances
    Annex F Sample Ordinance Adopting NFPA 55
    Annex G OSHA Requirements for Hydrogen Systems
    Annex H Determination of Separation Distances for Bulk Gaseous Hydrogen Systems
    Annex I Informational References
  • Prior Editions

    The 2016 edition of NFPA 55 helps users ensure industrial safety around compressed gases and cryogenic fluids.

    Compressed gases and cryogenic fluids require special safety measures that offer protection from physiological, over-pressurization, explosive, and flammability hazards. NFPA 55, Compressed Gases and Cryogenic Fluids Code fills the safety gap with the most comprehensive set of industrial gas requirements in the National Fire Codes.

    Depend on the 2016 edition of NFPA 55 for the latest fundamental requirements essential for safe installation, storage, use, and handling of gases in portable and stationary containers, cylinders, equipment, and tanks in all occupancy types.

    Major changes respond to industry needs and help you work more confidently:

    • Complete reorganization of hydrogen requirements works to clarify requirements by system size.
    • New chapter addresses the safe storage and use of liquid nitrous oxide.
    • Changes to CO2 system requirements expand requirements for beverage systems.

    NFPA 55 is essential for installers, contractors, engineers, facility managers, and anyone responsible for safety in settings that use, produce, or distribute compressed gases or cryogenic fluids. It's also a must-have resource for code enforcers, inspectors, and environmental health and safety (EHS) personnel. (Softbound, 143 pp., 2016)

     

    Interested in other editions of NFPA 55? Use the drop down menu above to select the edition year you need.

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  • 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.

  • Also in Codes \ Standards