Estimating the Flammable Mass of a Vapor Cloud

Published: 
July, 1999
ISBN: 
978-0-8169-0778-6
Pages: 
289

This CCPS Concept book shows designers and operators of chemical facilities how to realistically estimate the flammable mass in a cloud of accidentally released material that is capable of igniting. It provides information on industry experience with flammable vapor clouds, basic concepts of fires and explosions, and an overview of related computer programs.

Author(s): 
Errata: 
Errata sheet for Estimating the Flammable Mass of a Vapor Cloud

Chapter 5.2, page 151, Equation 5.9:  Put left bracket after 0.249 and right bracket after 1.041.  This makes it consistent with page 246 after the corrections listed below.

Appendix I Evaluating flammable mass for Gaussian dispersion models: instantaneous, point source 
 
page 243:  In Equation I.9b the exp should be erf  (error function instead of exponential).
  • In Equation I.12, the first two exp should be erf, but not the ones within square brackets.
  • In Equation I.11, the denominator term for v should be c-subscript LFL instead of c-subscript UFL
 
Appendix J, Evaluating flammable mass for Gaussian dispersion models: continuous release, approximate method page 246, Top line, equations number is missing. Should be (J.3)
  • Top line correction to Eq J.3: remove the <0.1 term.
  • Second line, should be for 1/L <or = (use the symbol for this that I can't type in Email) 0
  • Equation J.6: subscript to f should be z2 .
  • Equation J.6: inside brackets should have 1/L + C6  instead of 1/L - C6.