Is there residue after conflagration?

[djnord]

Will there be residue on the surfaces of the containment structure, either hydrocarbon or soot, after a conflagration involving an air/flammable vapor mixture approximately at its LFL concentration?

 

[Flareman]

I never did this experiment but my gut tells me that, even though you have excess air at the LFL, you must get some minor deposits on the container because of the local cooling effect, unless the container temperature goes above the AIT during the experiment allowing the residue to burn off.


David

 

[owg]

I observed the following demonstration at a Shell safety indoctrination many years ago. The demonstrator had an empty gallon can of gasoline. He demonstrated that it was empty by inverting it for a few seconds. Later he said, now this is empty right? and put a match to it. It popped. This was demonstrated a few more times. I guess the can stayed wet with gasoline, even after a few pops.

HAZOP at

http://www.curryhydrocarbons.ca