Flammability of fuels

[Joyer1]

Hi readers,
Please can someone help me out with interpreting LFL and UFL values
I have UFL values of 1.00E+06 ppm which is about 100% of it, what does this mean?
Can I still consider the mixtures to be flammable?
Some have LFL values and then UFL of this value but some of them do not have any LFL values just the UFL of 1.00E+06 ppm

This is to determine if a mixture can be considered flammable when carrying out consequence modelling

Thanks

 

[amustha1407]

Hi,

UFL 100% volume means that even without air or any oxidizing agent your component will explode. This is usually represent a very unstable gas /vapor like acetylene. UFL usually stated in % volume of gas in air.

Correct me if this is wrong, but If your UFL =100% then your LFL is also 100%, since no concentration is higher than 100%.