rud wrote:
I am running a gas line out to my garage, however the run is about
120feet so I'll need to use a couple of rolls. I am using type L soft
copper tubing. Is it okay to solder joints in a gas supply line or
should I use flared fittings?

thanks
Not a good idea to use copper for this. Natural gas reacts with copper
and causes it to flake off and clogs the orifices of the device using
the gas.
Typical underground gas pipe is coated black iron or special plastic
piping that requires special tools and training to use them (as well as
certification) Also note that the transition from under ground to above
ground with plastic should be as special metal riser to protect the pipe
from damage.
Typical codes require metal pipe be buried no less than 12" and plastic 18".