NFPA 67:2024

Chapter 1 Administration 1.1 Scope. 1.2 Purpose. 1.3 Piping Installation and Maintenance. 1.4 Applications. Chapter 2 Referenced Publications 2.1 General. 2.2 NFPA Publications. 2.3 Other Publications. 2.4 References for Extracts in Recommended Sections. Chapter 3 Definitions 3.1 General. 3.2 NFPA Official Definitions. 3.3 General Definitions. Chapter 4 General Detonation Protection Recommendations 4.1 Detonation Protection Methods Based on the Prevention of Combustion. 4.2 Detonation Protection Methods Based on the Prevention or Limitation of Damage. 4.3 Limitations. 4.4 Factors to be Considered. 4.5 Plans. 4.6 System Acceptance. 4.7 Inspection and Maintenance. Chapter 5 Detonation Prevention and Mitigation 5.1 Detonation Prevention by Prevention of Combustion. 5.2 Preventing Deflagration-to-Detonation Transition. 5.3 Detonation Isolation. Chapter 6 Detonation Containment 6.1 General. 6.2 Chapman-Jouguet Detonation Properties.6.3 Detonation Forces on Piping and Piping Supports. 6.4 Reflected Pressure Waves and Deflagration-to-Detonation Transition (DDT). 6.5 Detonation Containment in Pipes. 6.6 Pipe Structural Response to Detonation Loads. Chapter 7 Applications of Passive Detonation Protection Strategies 7.1 Underground Storage Vessels. 7.2 Aboveground Storage Vessels. 7.3 Protection of Process Units and Tank Farms from Waste Gas Systems (Incinerators, Flares, Thermal Oxidizers). 7.4 Protection Strategy for Carbon Adsorption Units. 7.5 Protection Strategy for Equipment (Blowers, Vacuum Pumps, etc.). 7.6 Selecting Flame Arresters for Actual Process Conditions. Chapter 8 Management of Change 8.1 Procedures for Management of Change. Chapter 9 Installation, Inspection, and Maintenance of Piping Explosion Protection Systems 9.1 General. 9.2 Design Parameters and Documentation. 9.3 Installation. 9.4 Inspection. 9.5 Availability of Explosion Protection System Documentation. 9.6 Maintenance. 9.7 Cleaning. 9.8 Procedures After an Explosion Protection System Event. 9.9 Recordkeeping. 9.10 Personnel Safety and Training. Annex A Explanatory Material Annex B Examples of Calculations of Suitable Pipe Wall Thickness for Pipe Wall Elastic Response to Stable Detonations Annex C Fundamentals of Deflagrations Annex D Principles of Detonations Annex E Detonation Propagation Across Boundaries Annex F Informational References

The intent of this recommended practice is to provide recommendations for the design, installation, and operation of piping systems where there is potential for the formation and ignition of a flammable gasmixture.