Work on my own natural gas lines...
 

I need to move this natural gas distribution block up on the wall in my garage a few feet so it's out of the way... clearly I need to shut off the supply and remove the block to open the lines... give it 24hrs to clear? Are those lines flared inside that block? Just use a hacksaw and go slow? No danger of spark with copper, right?
https://cimg0.ibsrv.net/gimg/www.mia...16ad3d0965.jpg

Yes, they will be flared.

Please do not use a hacksaw. A regular copper tubing cutter will work fine on that soft type K or L. Just use really light pressure on the cutter so you don't misshape or kink the line. You'll need to re-flare the tubing.

Get proper gas pipe dope for your threaded connections and brush on some leak-test when you're done to be sure everything is good.

FWIW I'm not a plumber, I just work for a Mechanical Contractor and play one on the weekends. I'd recommend getting more qualified advice - - but the above is what I would do.

Hire someone, dude.

Gas lines scare the shit out of me. Not done properly can blow your place up along with your family with it...

24 hours? LOL. More like a couple of minutes.

Yes, use a cutter, not a saw. Use the PROPER tape on threaded connections (it's different than the stuff you use for water lines). Re-flare, but remember to put the nut on the line FIRST!

Thanks for the responses... this will not be a problem. Lowes wanted $45 for the cheapest pipe cutter in the store... Amazon to the rescue for $35 total for cutter/flare kit/dope. I've got a crew showing up on the 14th to replace an entire HVAC system in the house... may slip one of those guys a $20 to do it though.