On Thu, 03 Sep 2009 17:59:21 +0200, "Fredrik Eriksson"
<fe79}--at--{yahoo}--dot--{com> wrote:

>On Thu, 03 Sep 2009 17:37:20 +0200, Stephen <mcavoysAT@aoldotcom> wrote:
>> Actually it is quite hard to ignite petrol from a petrol pump with a  
>> naked flame.
>
>That depends on the flame.
>

Yip! A thermite lance or a nova will do it ;)

>
>> Besides having a LEL (Lower Explosive Limit) petrol has an Upper  
>> Explosive Limit (UEL) where above that level the gas/air mixture is
>> too rich to burn. In the open air the gas/air mixture goes from too
>> rich to too leen very quickly. I once saw a petrol pump attendant put
>> a lit cigarette into the mouth of a full petrol tank.
>
>http://www.intuitor.com/moviephysics/mpmain.html#cigarettes

That agrees with what I said, I think.
-- 

Regards
     Stephen

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