Originally Posted by
Willit Run
ok, Last I knew, oxygen itself is not flammable. so, an O2 line cannot ignite. Oxygen supports combustion, but itself is not flammable.
What you say is scientifically correct, but because oxygen is essentially the Ur-oxidising agent, if anything in an oxygen-rich environment can burn it *will* burn much more fiercely than it would otherwise (case in point - the Velcro in the Apollo 1 Command Module).