Dow Fire & Explosion Index Presentation

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Dow Fire & Explosion Index Alberta Industrial Fire Protection Association December 3, 2010 Michael Baxter, P. Eng. Friday, December 3, 2010

Transcript of Dow Fire & Explosion Index Presentation

Page 1: Dow Fire & Explosion Index Presentation

Dow Fire & Explosion Index

Alberta Industrial Fire Protection Association December 3, 2010

Michael Baxter, P. Eng.

Friday, December 3, 2010

Page 2: Dow Fire & Explosion Index Presentation

Michael Baxter, P. Eng.Graduated 1989 "om University of Alberta, Structural Engineer

Factory Mutual Engineering - Loss Prevention Engineer

Marsh Canada Inc. - Loss Control Engineer

Baxter Risk Engineering, President

CNRL Horizon Project - Risk Engineer

Cenovus Energy - Process Safety Engineer/Fire Protection Engineer

Friday, December 3, 2010

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Dow Fire & Explosion Index

About the Index

Purpose of the Index

How Does the Index work

What are the results of the Hazard Analysis

Loss Control Credits

Summary of Results

Limitations

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Dow Fire & Explosion Index

Hazard Classification Guide - Seventh Edition

Origina&y issued in 1964

Based on actual loss experience

Widely used inside and outside of Dow

Leading Hazard Index recognized by the chemical industry

Edited version published by AICHe available to everyone

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PurposeDow F&E Index is a tool used for the evaluation of realistic fire, explosion and reactivity potential of process equipment and contents

Systematic methodology which provides a relative risk rank for process units

Used as a guide for the selection of fire protection methods

It is intended to be used early in the design stage, but can be used to evaluate existing processes

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How does it work1. Define Process Unit to be analyzed - Initial Screening

Chemical energy potential (Material Factor) - this is a measure of the intrinsic rate of potential energy release "om a fire or explosion

Quantity of hazardous material in Process Unit

Capital Density (do&ars per sq. *.)

Process pressure and temperature

Past history of fire and explosion incidents

Units critical to plant operation

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2. Process Unit Hazards

Exothermic / Endothermic Chemical Reaction

Material Handling and Transfer

Enclosed or Indoor Process Units

Access for Emergency Response

Drainage and Spi& Control

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3. Special Process Hazards Factors

Toxic Materials

Sub-Atmospheric Pressure

Operation in or Near Flammable Range

Dust Explosion

Relief Pressure

Low Temperature

Hot Oil Heat Exchange System

Rotating Equipment

Quantity of Flammable/Unstable Material

Liquids or Gases in Process

Liquids or Gases in Storage

Combustible Solids in Storage/Dusts in Process

Corrosion and Erosion

Leakage - Joints and Packing

Use of Fired Equipment

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Results of the Hazard Analysis

Determination of the Fire and Explosion Index

Material Factor x

Sum of Process Hazards Factors

xSum of Special Process

Hazards Factors

Degree of Hazard for F&EI

Degree of Hazard for F&EI

F&EI Index Range

Degree of Hazard

1-60 Light61 - 96 Moderate97 - 127 Intermediate128 - 158 Heavy159 - up Severe

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Loss Control Credit Factors

Process Control

Emergency Power

Cooling

Explosion Control

Emergency Shutdown

Computer Control

Inert Gas

Operating Procedures

Reactive Chemical Review

Process Hazard Analysis

Material Isolation

Remote Control Valves

Dump/Blowdown

Drainage

Interlock

Fire Protection

Leak Detection

Structural Steel (fireproofing)

Fire Water Supply

Special Systems

Sprinkler Systems

Water Curtains

Foam

Hand Extinguishers/Monitors

Cable Protection

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Analysis SummaryF&E Index - An industry recognized method for ranking the relative risk of a process unit

Hazard Analysis estimates the maximum damage that would probably result "om a realistic worst case incident at a process plant

Radius/Area of Exposure - shown on plot plans and used to estimate the extent of the affect of a fire

Base Maximum Probable Property Damage = area of exposure x do&ar amount per square *. x damage factor

Actual Maximum Probable Property Damage = Base Maximum Probable Property Damage x Loss Control Credit Factor

Maximum Probable Days Outage / Business Interruption

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What are the strengths

Methodology is easy to duplicate

Methodology forces the user to evaluate a& of the aspects of a process unit that increase the severity of a fire or explosion

Relatively easy to learn how to use the methodology

Methodology is based on actual loss experience, but is sti& fairly conservative

Industry recognized methodology for risk ranking a chemical process

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What are the limitationsIntended to be used during design stage of a project

Can also be used on an existing plant, but is harder to apply the fixes

Calculates Maximum Probable Property Damage, but is not a good tool for demonstrating normal expected loss

Loss control credit factors do not change the F&E Index, they only affect the Maximum Probable Property Damage

Use of the hazard analysis guide and interpretation of the results sti& requires some judgement

Friday, December 3, 2010