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 30000002831786 TD888.C5P78 1988 Open Access Book Book
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 30000001619315 TD888.C5P78 1988 Open Access Book Book
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Summary

Summary

Guidelines for Vapor Release Mitigation is a survey of current industrial practice for controlling accidental releases of hazardous vapors and preventing their escape from the source area.


Author Notes

Richard W. Prugh is the author of Guidelines for Vapor Release Mitigation, published by Wiley.

Robert W. Johnson is the author of Guidelines for Vapor Release Mitigation, published by Wiley.


Table of Contents

Preface
Acknowledgments
Summary
Glossary
Chapter 1 Introduction
1.1 Objective
1.2 Hazard of Accidental Vapor Cloud Releases
1.3 Types of Vapor Clouds
1.3.1 Flammable Vapor Clouds
1.3.2 Toxic Vapor Clouds
1.3.3 Flammable-Toxic Vapor Clouds
1.3.4 Other Types of Vapor Clouds
1.4 Forms of Vapor Release
1.5 Release Causes
1.6 Possible Consequences of Vapor Cloud Releases
1.6.1 Toxic Effects
1.6.2 Fires
1.6.3 Explosions
1.7 Analysis of the Need for Mitigation
1.8 Vapor Release Mitigation Approaches
Chapter 2 Mitigation through Inherently Safer Plants
2.1 Inventory Reduction
2.2 Chemical Substitution
2.3 Process Modification
2.3.1 Refrigerated Storage
2.3.2 Dilution
2.4 Siting Considerations
Chapter 3 Engineering Design Approaches to Mitigation
3.1 Plant Physical Integrity
3.1.1 Design Practices
3.1.2 Materials of Construction
3.2 Process Integrity
3.2.1 Identification of reactants and Solvents
3.2.2 Limits on Operating Conditions
3.2.3 Process Control Systems
3.2.4 Pressure Relief Systems
3.2.4.1 Relief Devices
3.2.4.2 Relief Headers
3.3 Process Design Features for Emergency Control
3.3.1 Emergency Relief Treatment Systems
3.3.1.1 Active Scrubbers
3.3.1.2 Passive Scrubbers
3.3.1.3 Stacks
3.3.1.4 Flares
3.3.1.5 Catchtanks for Vapor-Liquid Separation
3.3.1.6 Incinerators
3.3.1.7 Absorbers
3.3.1.8 Adsorbers
3.3.1.9 Condensers
3.3.2 Emergency Process Abort Systems
3.3.3 Emergency Isolation of Leak/Break
3.3.3.1 Isolation Devices
3.3.3.2 Remote Isolation
3.3.3.3 Inspection and Testing of Isolation Devices
3.3.4 Emergency Transfer of Materials
3.3.4.1 Transfer of Vapor/Cover Gas to Reduce Driving Pressure
3.3.4.2 transfer of Liquids to reduce Inventory Available for Release
3.4 Spill containment
3.4.1 Double Containment
3.4.2 Enclosures and Walls
3.4.3 Dikes, Curbs, Trenches, and Impoundments
Chapter 4 Process Safety Management Approaches to Mitigation
4.1 Operating Policies and Procedures
4.2 Training for Vapor Release Prevention and Control
4.3 Audits and Inspections
4.4 Equipment Testing
4.5 Maintenance Programs
4.6 Modifications and Changes
4.7 Methods for Stopping a Leak
4.7.1 Patching
4.7.2 Freezing
4.8 Security
Chapter 5 Mitigation through Early Vapor Detection and Warning
5.1 Detectors and Sensors
5.1.1 Types of Sensors
5.1.1.1 Combustion
5.1.1.2 Catalytic
5.1.1.3 Electrical
5.1.1.4 Chemical Reaction
5.1.1.5 Visual
5.1.1.6 Absorption/Scattering
5.1.2 Response Time of Sensors
5.1.3 Positioning of Sensors
5.2 Detection by Personnel
5.2.1 Odor Warning Properties
5.2.2 Color or Fog
5.3 Alarm Systems
Chapter 6 Mitigation through Countermeasures
6.1 Vapor/Liquid Releases
6.2 Vapor Release Countermeasures
6.2.1 Water Sprays
6.2.2 Water Curtains
6.2.3 Steam Curtains
6.2.4 Air Curtains
6.2.5 Deliberate Ignition
6.2.6 Ignition Source Control
6.3 Liquid Release Countermeasures
6.3.1 Dilution
6.3.2 Neutralization
6.3.3 Covers
6.3.3.1 Liquids
6.3.3.2 Foams
6.3.3.3 Solids
6.3.3.4 Application
6.4 Avoidance of Factors that Aggravate Vaporization
Chapter 7 On-Site Emergency Response
7.1 On-Site communications
7.2 Emergency Shutdown Equipment and Procedures
7.3 Site Evacuation
7.4 Havens
7.5 Escape from Vapor Cloud
7.6 Personal Protective Equipment
7.7 Medical Treatment
7.8 On-Site Emergency Plans, Procedures, T