[himno hero]

the feed line would still be torching away.....

[volunbeer]

the feed line would still be torching away.....

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Usually, but ultimately it depends on the size and source of the gas leak. A slow leak can fill a space to the lower explosive limit (LEL) and may not have the velocity to sustain a flame from the leak as flames will not burn back into an intact line.

Fuel air explosions are difficult to predict.