Use the yellow tape. Its specifically for gas. I also use a small amount of pipe dope on the female fittings. Pressure test the new work separately, or if its a small add on use a soap solution to test your work.
Yes, you can. You could also use pipe dope, according to my dad. He works for infra source installing natural gas piping.
There are approved Teflon tapes for "gas" but it depends on the HJA and what type of "gas" your asking about
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)
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
Pretty much anything - in the UK steel, copper, polyethylene and PVC are all used where suitable.
Yes, you can. You could also use pipe dope, according to my dad. He works for infra source installing natural gas piping.
There are approved Teflon tapes for "gas" but it depends on the HJA and what type of "gas" your asking about
If you are running natural gas or propane, gas teflon tape. Otherwise, any white teflon plumbers tape is fine.
Teflon tape is a solid.
Certain restrictions regarding Teflon such as gas piping require a different type of teflon appreoved for the type of fuel going though the piping When connecting tublar waste lampwick does an amazing job not to be confused with quickwick
Nothing, as long as you don't have tape over end of threads.
Teflon tape is a solid.
Yes
No. Use teflon tape instead. PVC will melt or burn depending on the temperature
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)
While there are Teflon lubricants, Teflon (PTFE) thread seal tape is most definitely for sealing threads. There are relevant standards for these and they are UL listed for such use. Typically for propane & natural gas you would want to use yellow thread seal tape. It is thicker than the standard white. I prefer it over "pipe dope" as it does not harden up with time, and it is guaranteed to have even coverage. In addition to it's ability to seal, the lubricating effects of the tape allow easier tightening of joints, further reducing the liklihood of a leak.