Galvanized steel copper brass or csst corrugated stainless steel tubing also can be used in some areas but some utilities specifically prohibit the use of copper.
Copper gas line in attic.
It was run in an unprofessional manner in that it runs up from the basement and then along a door threshold and finally through a wall.
The most common gas piping is black steel.
In other areas the use of copper is widespread.
Or you could replace the damaged tubing with a flexible stainless connector as shown here.
You could cut a new length of coiled soft copper flare the ends and connect it with flare fitting.
I have just purchased a house where the gas line for the dryer is copper.
In some areas it is legal to use flexible copper tubing w flared connections for gas.
Copper has the ability to be formed in long service line coils.
A short quick video on my work installing gas line the existing line was rusty and was not safe along the floor and i need to move the stove to make room fo.
You should know what is acceptable in your area.
Are there any rules or safety concerns about running a new gas through the wall into the attic and then dropping it down through the wall.
There were problems w old style galvanized iron pipes for that reason.
If the flare fitting on the flexible stainless gas line matches the size of the flare fitting on the existing gas valve you can simply screw it on.
Copper offers a relatively inexpensive material for service line composition.