Acetylene question

........And that says........

Acetylene cylinders must be transported and
stored vertically. If acetylene cylinders have been
found laying on their side, allow them to stand in an upright
position for at least 30 minutes before use. Acetylene cylinders
contain a porous mass and liquid acetone that dissolves the gas.
An upright position gives the liquid acetone time to settle back
into its correct place in the porous mass. This prevents the release
of solvent which can quickly vaporise and lead to problems that
affect both safety and quality.

So factoring in the "CYA" formula, that means maybe 5 minutes LOL