On Mon, 16 May 2016 00:48:06 -0400, email@example.com wrote:
More polichromatic bovine excrement.. Natural gas and propane have
the exact same effect on teflon tape - none at all.
However, pipe dope mis recommended over tape because the tape can cut
and turn into "threads" of teflon and block orifices or stick in
valves. There are 3 basic teflon tapes - white(single thickness) ,
yellow (double thickness) and pionk (triple thickness. White is
forbidden in all gas connections. Some places allow yellow - some
allow pink, and some do not allow tape at all.
On Mon, 16 May 2016 15:09:29 -0400, firstname.lastname@example.org wrote:
I was told this about not using teflon tape back in the late 70's or
early 80's. What I heard was pretty vague, and I dont recall who said it
anymore. Anyhow, these days we have better access to information. Either
way, I guess I was told correctly to NOT use it, but for the wrong
reason. What you said makes a lot of sense. I am fully aware of using
teflon tape on plumbing, and when I'd first turn on the water, the
faucet strainers would clog. I'd remove them, and find rust particles
(if ther was OLD steel pipe involved), -AND- pieces of teflon tape,
along with little bits of solder (on copper pipe). On plbg its easy to
remove, but I could see orfices and stuff getting quickly clogged on gas
I'll just stick with using pipe dope on all gas pipes!
Thickness yes, not any different otherwise (barring the color, of
course). White PTFE is single thickness, yellow is double and pink is
I know of nowhere it is in any Code requirement and unless it's been
changed which I think it hasn't, the National Fuel Gas Code handbook
2.6.7(d) refers to using pipe dope suitable for use with gas and says:
"This requirements does not prohibit the use of teflon tape as a pipe
dope. [Further comments regarding workmanship elided for brevity]"
The requirement for the thicker tape (hence yellow as common identifier)
is the only one I'm aware of.
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