Propane LEL

[AreJay]

I have just been given a question which i hope someone could help me answer. If we have a propane release in quite a large container and we have 10-15% LEL how do we calculate the combustion limit or start point for combustion? Is there a table/chart which i can refer to showing the LEL for propane?

Thanks,

R

 

[DRWeig]

http://en.wikipedia.org/wiki/Flammability_limit

An "official" listing can be found in the NFPA codes or on the MSDS (material safety data sheet) from any propane manufacturer/seller.

Good on ya,

Goober Dave

 

[moltenmetal]

What you must never forget when dealing with propane is that it is much denser than air. Stratification WILL be an issue- propane and air will not mix effortlessly.

You haven't been at all clear what you're on about, but if the propane stratifies toward the bottom of your container, you will exceed 100% LEL somewhere.

 

[dcasto]

thats why with propane you place the LEL detectors low and with methane, up high.

 

[786392]

Dear AreJay
In Near-still air or Low wind speed conditions, colder ambient conditions

the Propane and LPG being invisible clouds do travelvery far away from leak source Undisturbed and usually stay within combustible LEL/ LFL range.

Flashback occurs if any ignition source is encountered by such clouds.

Best Regards
Qalander(Chem)