See the NFPA (National Fire Protection Association) and the Copper Development Association (CDA)
Normally this would come under the auspices of a licensed master plumber
No it will not poison you. Copper piping is used extensively in Medical Gas applications. "TYPE L" signifies the wall thickness of the piping.
Piping material used for forming gas would be 316L stainless steel.
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.
I use schedule 40 for natural gas BUT if your talking medical Gases then look up the NFPA 54 or contact the CDA and your local codes
Galvanized piping or painted depending on local codes and type of fuel (gas) NO drip legs where the piping is subject to freeze ups
To get the electricity from where it came from to where it is going, Just like water piping, gas piping, sewer piping, etc.
Gas piping must be bond to the appliance it serves.
The purpose of a drip leg in the gas piping is used as a device to capture dirt and debris from entering the furnace.
Most codes do not allow Galvanized piping/fittings on gas piping. I have used galvanized pipe/fittings on exterior gas piping before in the state of Michigan but other states do not allows this. Check with your local code authorities.
i dunna??
Yes, you can. You could also use pipe dope, according to my dad. He works for infra source installing natural gas piping.
We specialize in installing urinals or acid waste systems or medical gas lines or fire suppression piping or storm water recycling or steam / hydronic systems