Inb4: I don't work in the industry, my knowledge is limited to a faint memory of a college course on fluid dynamics.

If I recall correctly, high pressure ignitable stuff can spontaneously turn !!FUN!! in absence of heat if it is suddenly relieved through a pinhole. Basically jet is followed by a ring-like zone where the stuff mixes with oxygen. Jet creates tiny zones of very high temp, thus igniting the mixture ring that follows.

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DannyBee 8 hours ago | parent [-]

This is true in other cases but in this case they are actually hoping it leaks

	▲	VTimofeenko 4 hours ago \| parent [-]
		Maybe the thought process is that leak would effectively be pressure normalizing over a larger area and more gradually than creating a tiny hole, so whatever I said about jet ignition would not be applicable