Teflon tape is a solid.
Nothing, as long as you don't have tape over end of threads.
Solid
Teflon was discovered accidentally by Roy Plunkett in April 6, 1938 while experimenting with synthesizing new types of refrigerant gas when he accidentally produced Teflon.
Freon is a gas used in refrigerators while Teflon is a nonstick substance used in pans.
There are approved Teflon tapes for "gas" but it depends on the HJA and what type of "gas" your asking about
Teflon tape is a solid.
If you are running natural gas or propane, gas teflon tape. Otherwise, any white teflon plumbers tape is fine.
Teflon tape is a solid.
Yes
You tape the joints with yellow teflon tape then screw them on using two wrenches so as not to twist any fittings. - After switching as on, spray the joints with 'gas detect' or liquid soap to check for leaks.
No. Use teflon tape instead. PVC will melt or burn depending on the temperature
Nothing, as long as you don't have tape over end of threads.
Yes you can run threaded gas fittings in any wall. Just no mechanical joints, (unions, flared fittings ect.). Just make sure you test the line with air. Our company tests at 20lbs and usually leave it overnight to see if there's a drop. This is plenty because you gas line usally only produces a couple pounds of pressure or less. Use teflon tape and pipe dope on every joint. BEFORE using "Teflon" tape make sure it the type approved for the type of "gas" your using. The white Teflon tape is NOT approved in many places as approved for gas service
No.1 get a gas fitter to do so no such thing as diy gas work. No.2 if really stuck use gas type thread tape (yellow)
Welding, Brazing ,threading with Teflon tape (unless it is gas)
Yes, you can. I had this very same question myself a few days ago. In order to answer it, I put a piece of teflon tape in the flame of a propane torch. It shriveled, but did not burn or melt and when I stretched it out, it returned to its original shape. I then made a sweat joint inches from a teflon wrapped joint with no problems. You sure want to be carfeul when doing this though. Teflon gives off extremely toxic gas if you melt it.