I have no idea if it's FAA Approved, but I used to use stuph called
RectorSeal instead of tape on the flare fitting on 0.25" steel sense
lines used on the pipeline. It was no problem with 700psi gasoline, etc.


--
A host is a host from coast to
& no one will talk to a host that's close........[v].(301) 56-LINUX
Unless the host (that isn't close).........................pob 1433
is busy, hung or dead....................................20915-1433