Does the consequence analysis make use of a dense gas dispersion model to predict flammable envelopes?
Jet expansion of methane from a high pressure source lowers the temperature but not sufficiently to make it denser than air. Thus dense gas dispersion programs are rarely appropriate for releases of methane at ambient temperature. If such a program is employed to predict the dimensions of a flash fire, the result may be smaller than if a passive dispersion program was used.
