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NFPA 55: Compressed Gases and Cryogenic Fluids Code, 2020
- Important Notices and Disclaimers
- Additional Important Notices and Disclaimers
- Chapter 1 Administration [Go to Page]
- 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 [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 General Requirements [Go to Page]
- 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 [Go to Page]
- 5.1 Hazardous Materials Classification.
- Chapter 6 Building-Related Controls [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
- 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 [Go to Page]
