Ever wondered what happens if you put a can of WD40 in a woodburner?
Not something to try at home!
I was surprised at how long it took before the can exploded. I would have
expected the plastic valve near the nozzle to melt quicker than that, and
maybe to cause an impressive jet of flame for a while before the whole can
If you watch videos of fires on the news, something normally "blows" on
LPG cylinders and you get a jet of flame, insufficient to turn it into a
rocket, and the cylinder itself doesn't explode. It *might* be that the
same happened in this case and that it was the containment provided by
the woodburner, probably the windows or the lid, which "blew".
Yes, that's what I'd expect to happen with an aerosol can: that the valve in
the nozzle would melt and release the contents, rapidly rather than
explosively, long before the pressure built to the point where the metal of
the can sheared at its weakest point and dumped its contents explosively.
Even an inert propellant will increase in pressure enough to make the can
rip open; if the propellant or payload is flammable, then that makes things
even more dramatic - which is what you'd think they'd want to avoid with
They would go off explosively in large parts of the world including
the middle east which is presumably where they got the idea from.
Islamic terrorists foiled by the EU bureaucrats and the Health and
Safety Executive. It's enough to give The Daily Mail readers
I think not a store, unless there was more than spectacularity at the
time. I worked on the 20th floor of Lunar House (top ten floors weren't
the immigration dept., sorry Harry and co.) from 1976-79, a few hundred
yards from West Croydon station. A freight train with 12 or so tanker
carriages in a siding ignited and caused most interesting fireworks.
Several of us young un's watched through the window, ignoring
loudspeaker warnings not to do so.
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