People that routinely work on gas lines use tools that will not spark.
But that's a bit much for the average diy'er. I'd say take your time.
Don't bang on stuff. Do not use power tools. Try to cover or plug any
openings you have to leave open. Keep all sources of ignition away.
Common sense stuff.

basskisser wrote:
Jeff wrote:
I have to replace my elbows and shut off valves on my fuel tanks (gas) of my
boat. some of the connectors have gotten rusty and clogged with debris.
Is there any risk of explosion from unscrewing the hoses and pipes. I am
trying to avoid having to dump $500 worth of fuel. I don't want to end up
in the next county either.....
Thanks
Jeff

Whenever you are around gasoline there is a risk of explosion, even at
the gas pump with your car.
That being said, I'd be a little careful, but wouldn't dump the
gasoline. What would you do with it anyway?