it is a gas
Absolutely Not!
Because that is what is used for gas.
You should use black pipe -- Galv. pipe will flake off inside of pipe
No.
Approved pipe joint compounds
yes. Hybrid cars are a mixture of gasoline and electicity. So, you can use either, OS it has a gas pipe
Black iron pipe is used for gas installations but ONLY if the piping is indoors. Outdoor gas piping is usually done in galvanized pipe. Steam is also piped with black pipe, fire sprinkler and standpipe systems also use black pipe.
Use only black pipe
It is not a good idea to use copper pipe with natural gas as any sulphur compounds in the gas can cause an oxide to form in the copper pipe. Often copper is used with propane. In these instances, soft copper tubing is usually used with compression fittings. The tools required are, pipe cutter and 2 wrenches.
We can use a pipe from rubber or plastic.
I use the Pipe Friendly Tape Measure by TekForce. It makes measuring pipes easier and faster.