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NFPA 68 2018

NFPA 68 2018

$80.71

NFPA 68: Standard on Explosion Protection by Deflagration Venting

Published By Publication Date Number of Pages
NFPA 2018 100
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This standard applies to the design, location, installation, maintenance, and use of devices and systems that vent the combustion gases and pressures resulting from a deflagration within an enclosure so that structural and mechanical damage is minimized.

PDF Catalog

PDF Pages PDF Title
2 Important Notices and Disclaimers
3 Additional Notices and Disclaimers
8 Chapter 1 Administration
1.1 Scope.
1.2 Purpose.
1.3 Application.
1.4 Retroactivity.
1.5 Equivalency.
1.6 Conversion Factors.
9 1.7 Symbols.
1.8 Pressure.
Chapter 2 Referenced Publications
2.1 General.
2.2 NFPA Publications.
10 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.
12 Chapter 4 General Requirements
4.1 Goal.
4.2 Objectives.
4.3 Compliance Options.
Chapter 5 Performance-Based Design Option
5.1 General Requirements.
5.2 Performance Criteria.
13 Chapter 6 Fundamentals of Venting of Deflagrations
6.1 Basic Concepts.
6.2 Mixtures.
6.3 Enclosure Design and Support.
15 6.4 Enclosure Length-to-Diameter Ratio and Vent Variables.
16 6.5 Vent Closure Operation.
6.6 Consequences of a Deflagration.
6.7 Effects of Vent Inertia.
17 6.8 Effects of Vent Discharge Ducts.
6.9 Venting with Flame Arresting and Particulate Retention.
18 Chapter 7 Venting Deflagrations of Gas Mixtures and Mists
7.1 Introduction.
7.2 Venting by Means of Low Inertia Vent Closures.
20 7.3 Partial Volume Effects.
21 7.4 Effects of Panel Inertia.
7.5 Effects of Vent Ducts.
22 7.6 Fireball Dimensions.
7.7 Deflagration Venting of Enclosures Interconnected with Pipelines.
Chapter 8 Venting of Deflagrations of Dusts and Hybrid Mixtures
8.1 Introduction.
8.2 Venting by Means of Low-Inertia Vent Closures.
24 8.3 Effects of Panel Inertia.
8.4 Effects of Partial Volume.
26 8.5 Effects of Vent Ducts.
27 8.6 Bins, Hoppers, and Silos.
8.7 Venting of Dust Collectors Using Bags, Filters, or Cartridges.
28 8.8 Bucket Elevators.
8.9 Fireball Dimensions.
29 8.10 Venting Internal to a Building with Flame-Arresting and Particulate Retention Device.
8.11 Venting Silos or Other Storage Vessel Provided with Integral Bin Vents.
30 8.12 Deflagration Venting of Enclosures Interconnected with Pipelines.
Chapter 9 Venting of Deflagrations of Gases and Dusts in Pipes and Ducts Operating at or Near Atmospheric Pressure
9.1 Introduction.
9.2 Design.
31 9.3 Multiple Deflagration Vents on a Pipe or Duct.
32 Chapter 10 Details of Deflagration Vents and Vent Closures
10.1 Normally Open Vents.
10.2 Normally Closed Vents.
10.3 Types of Building or Room Vent Closures.
10.4 Restraints for Large Panels.
10.5 Equipment Vent Closures.
33 Chapter 11 Inspection and Maintenance
11.1 General.
11.2 Design Parameters and Documentation.
11.3 Installation.
11.4 Inspection.
34 11.5 Procedures Following Vent Closure Actuation.
11.6 Vent Closure Design Parameters.
11.7 Inspection Reports.
11.8 Recordkeeping.
11.9 Management of Change.
11.10 Maintenance.
11.11 Employee Training.
35 Annex A Explanatory Material
64 Annex B Fundamentals of Deflagration
69 Annex C Guidelines for Measuring Deflagration Parameters of Dusts
72 Annex D Deflagration Characteristics of Select Flammable Gases
74 Annex E Estimating Fundamental Burning Velocity
75 Annex F Deflagration Characteristics of Select Combustible Dusts
77 Annex G Calculation Method for Correction Factor Due to Increased Vent Panel Mass
80 Annex H Research Reports and Supporting Documents
81 Annex I Full and Partial Volume Gas Venting of a Building — Example Problem
87 Annex J Effect of Dust Partial Volumes on Venting of Buildings — Example Problem
88 Annex K Bibliography
91 Annex L Informational References

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NFPA 68 2018
$80.71