NFPA 68 2013

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NFPA 68: Standard on Explosion Protection by Deflagration Venting

Published By	Publication Date	Number of Pages
NFPA	2013	87

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Category: NFPA

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Description

NFPA 68 includes the new best practices for Industrial fire protection and fire safety. Updated based on technology changes, fire experience, and the latest fire safety practices, NFPA 68 Standard on Explosion Protection by Deflagration Venting 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. The Standard includes a performance-based option, including self-contained chapters supporting the performance-based aspect. Important changes in the 2013 edition include: Updated requirements for pressure vent manifolds Updated method and equations for venting of gas mixtures Added equations for venting of enclosures with initial pressures below atmospheric A new section on bucket elevators A new annex chapter on estimating fundamental burning velocities Base your industrial fire protection strategies on the latest edition of NFPA 68.

PDF Catalog

PDF Pages	PDF Title
2	Important Notices and Disclaimers
3	Additional Notices and Disclaimers
4	2.1 General 2.2 NFPA Publications
9	Chapter 1 Administration 1.1 Scope 1.2 Purpose 1.3 Application 1.4 Equivalency 1.5 Retroactivity 1.6 Conversion Factors 1.7 Symbols
10	1.8 Pressure Chapter 2 Referenced Publications 2.3 Other Publications 2.4 References for Extracts in Mandatory Sections
11	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
13	Chapter 5 Performance-Based Design Option 5.1 General Requirements 5.2 Performance Criteria 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 6.5 Vent Closure Operation
16	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 Effects of Panel Inertia 7.4 Effects of Vent Ducts 7.5 Effects of Initial Elevated Pressure 7.6 Vent Design
21	7.7 Fireball Dimensions 7.8 Deflagration Venting of Enclosures Interconnected with Pipelines Chapter 8 Venting of Deflagrations of Dusts and Hybrid Mixtures 8.1 Introduction
22	8.2 Venting by Means of Low-Inertia Vent Closures
23	8.3 Effects of Partial Volume
24	8.4 Effects of Initially Elevated or Subatmospheric Pressure
25	8.5 Effects of Vent Ducts 8.6 Bins, Hoppers, and Silos
26	8.7 Venting of Dust Collectors Using Bags, Filters, or Cartridges 8.8 Bucket Elevators
27	8.9 Fireball Dimensions
28	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 8.12 Deflagration Venting of Enclosures Interconnected with Pipelines
29	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
30	9.3 Multiple Deflagration Vents on a Pipe or Duct Chapter 10 Details of Deflagration Vents and Vent Closures 10.1 Normally Open Vents
31	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 Chapter 11 Inspection and Maintenance 11.1 General
32	11.2 Design Parameters and Documentation 11.3 Installation 11.4 Inspection 11.5 Procedures Following Vent Closure Actuation
33	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 Annex A Explanatory Material
60	Annex B Fundamentals of Deflagration
64	Annex C Guidelines for Measuring Deflagration Parameters of Dusts
67	Annex D Deflagration Characteristics of Select Flammable Gases
69	Annex E Estimating Fundamental Burning Velocity
70	Annex F Deflagration Characteristics of Select Combustible Dusts
72	Annex G Calculation Method for Correction Factor Due to Increased Vent Panel Mass
75	Annex H Research Reports and Supporting Documents Annex I Effect of Partial Volumes on Buildings — Example Problem
76	Annex J Bibliography
79	Annex K Informational References
81	Index