NFPA 53 : 2021

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Application. 1.4 Interpretations. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Recommendations Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 Types of Systems Used in Oxygen-Enriched Atmospheres 4.1 General. Chapter 5 Materials Selection 5.1 General. 5.2 Nonmetals. 5.3 Metals. Chapter 6 Component Selection 6.1 Material Recommendations. 6.2 General Design Recommendations. 6.3 Specific Component Design Guidelines. 6.4 Components. Chapter 7 System Design.7.1 Design Considerations. 7.2 Worst-Case Conditions. 7.3 Fire-Stopping Techniques. 7.4 Personnel Qualifications. 7.5 Oxygen Transmission. 7.6 Shutoff. 7.7 Electrical Equipment. 7.8 Cleaning for Oxygen Service. 7.9 Combustibles. 7.10 Applicable Standards. Chapter 8 Fire Extinguishment 8.1 Oxygen Supply. 8.2 Extinguishing Systems. 8.3 Fixed Systems. 8.4 Water Hose. 8.5 Diluents. 8.6 Limiting Fire Spread. 8.7 Nontoxic Agents. 8.8 Wetting. 8.9 Instructions and Drills. Annex A Explanatory Material Annex B Training and Education Annex C Utilization of Oxygen-Enriched Atmospheres Annex D Fire Experience Annex E Fundamentals of Ignition and Combustion in Oxygen-Enriched Atmospheres Annex F Materials for Use in Oxygen-Enriched Atmospheres Annex G Informational References.

This document establishes recommended mini‐mum criteria for the safe use of oxygen (liquid/gaseous) and the design of systems for use in oxygen and oxygen-enriched atmospheres (OEAs).