NFPA 67: Guide on Explosion Protection for Gaseous Mixtures in Pipe Systems

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2013 NFPA 67
Prior Years Prior Editions of NFPA 67

New NFPA 67 provides guidelines to help prevent and mitigate flammable vapor explosions in pipe systems.

The first-edition of NFPA 67: Guideline on Explosion Protection for Gaseous Mixtures in Pipe Systems provides a framework for designing, installing, and maintaining piping systems that contain or may contain flammable vapor mixtures.

This important document presents the latest best practices used to:

  • Prevent, contain, suppress, and/or vent explosions
  • Avoid Deflagration-to-Detonation Transition (DDT)
  • Contain detonations
  • Minimize damage due to explosions

Developed by experts based on industry needs, NFPA 67 is intended to improve industrial fire protection and fire safety. It's essential for designers, owners and safety managers, insurance professionals, plan reviewers, AHJs, and everyone involved with fire and explosion safety in facilities where piping systems are installed. (Softbound, 35 pp., 2012)

NFPA® 67 Guide on Explosion Protection for Gaseous Mixtures in Pipe Systems 2013 Edition

Chapter 1 Administration
1.1 Scope
1.2 Purpose
1.3 Applications
Chapter 2 Referenced Publications
2.1 General
2.2 NFPA Publications
2.3 Other Publications
2.4 References for Extracts in Advisory Sections. (Reserved)
Chapter 3 Definitions
3.1 General
3.2 NFPA Official Definitions
3.3 General Definitions
Chapter 4 Fundamentals of Deflagrations
4.1 General
4.2 Flammable Limits
4.3 Burning Velocity
4.4 Flame Speed
4.5 Mixtures
Chapter 5 Principles of Detonations
5.1 Properties
5.2 Detonation Cells and Mixture Composition Limits
5.3 Chapman-Jouguet (CJ) Detonations
5.4 Detonation Development from Deflagration
5.5 Direct Initiation of a Detonation
5.6 Statement on Mixtures. (Reserved)
Chapter 6 Detonation Prevention
6.1 Detonation Prevention by Composition Control
6.2 Deflagration Intervention
Chapter 7 Detonation Containment
7.1 General
7.2 Detonation Forces on Pipes
7.3 CJ Pressure
7.4 Reflected Pressure Waves
7.5 Detonation Containment in Pipes
7.6 Detonations in Large Structures. (Reserved)
7.7 Pipe Structural Response to Detonation Loads
Chapter 8 Detonation Propagation Across Boundaries
8.1 General - Detonation Propagation Across Boundaries. (Reserved)
8.2 Flame Quenching
8.3 Minimum Opening Diameter for Detonation Propagation
Chapter 9 Mitigation of Detonation Effects
9.1 Passive Detonation Arresters
9.2 Active Detonation Arrester Systems
9.3 Detonation Arrester Systems
9.4 Water Sprays
Chapter 10 Applications of Passive Detonation Protection Strategies
10.1 Underground Storage Vessel
10.2 Aboveground Storage Vessel
10.3 Protection of Process Unit and Tank Farm from Thermal Oxidizer
10.4 Protection Strategy for a Carbon Adsorption Unit
10.5 Protection Strategy for Equipment (Blowers, Vacuum Pumps, etc.)
10.6 Selecting Flame Arresters for Actual Process Conditions
Chapter 11 Management of Change
11.1 Procedures for Management of Change
Chapter 12 Installation, Inspection, and Maintenance
12.1 General
12.2 Design Parameters and Documentation
12.3 Installation
12.4 Inspection
12.5 Availability of Explosion Protection System Documentation
12.6 Maintenance
12.7 Cleaning
12.8 Procedures After an Explosion Protection System Event
12.9 Recordkeeping
12.10 Personnel Safety and Training
Annex A Explanatory Material
Annex B Informational References