I am laying a black iron pipe in a trench about 3' deep, that is a gas
line for my NG grill. About 10' long.
My question is, would the pipe benefit from anti rust treatment, such
as Cosmoline. Thanks
i
It could benefit from being replaced by a more appropriate material
selection, such as the jacketed corrugated stainless gas line that is
replacing black pipe for gas service most everywhere now.
Galv pipe is not approved in my area for gas service. The authorities
say the zinc will flake off in time on the inside of the pipe and
cause plugging of the orifices in gas appliences
On Sep 22, 11:31 am, Ignoramus11107 <ignoramus11...@NOSPAM.
11107.invalid> wrote:
It will probable last 20-30 years without and treatment, BUT you would
be much better off if you wrap it in the self adhesive tape that is
available for this application. Usually it is available at a good
plumbing supply. Around here, even galv pipe has to be wrapped where
it passes through cement. The other way would be to run the proper
type of poly tubing for gas service, also available at plumbing
supplie stores. Many years ago, I ran gas to my house through black
poly. Every time the area flooded, you could trace the path of the
line by following the ting bubbles comeing up through the water. Not
enough to smell or even be picked up with my gas detector, but the
bubbles were there regardless
On Sep 22, 12:14 pm, Ignoramus11107 <ignoramus11...@NOSPAM.
11107.invalid> wrote:
Pete answered your question. In my city, plumbers need special
certification to run flex. It isn't even legal for a homeowner to
mess with natural gas anyway. Might want to just call in a plumber so
you don't cause some disaster sometime down the road.
Where is this not allowed? I installed a new natural gas service to
my house in Middletown, Ohio 24 years ago. I had to use the orange
plastic, and leave the trench open for the city inspection, then have
CG&E run a leak test before I was allowed to fill the ditch and have my
gas turned back on.
The guy from CG&E couldn't figure out how I got a full 21 foot piece
of black iron pipe into the 12' * 12' basement, and was upset that I
passed the test on the first try. He had bragged that licensed plumbers
failed at least three times per location, before it passed and 'that
there is no way in hell you'll pass if they can't'. He ran the test
three times, in an attempt to fail me. After he finished, I explained
how I got the pipe into the basement, in one piece. ;-)
--
Service to my country? Been there, Done that, and I\'ve got my DD214 to
prove it.
If you need the answer ASAP, go to the local plumbing supply place (not Home
Cheapo, Lowes, etc) and ask them. Most likely they'll know the local code,
or know someone who does.
The Usenet is not the place to ask questions that need answering "right
now".
Plumbing stores, in my experience, are not the place either. They rarely, in my
experience, know anything that they are willing to state about code
requirements. The inspector is by far a better source of this info. Usenet is at
least as good as plumbing stores.
Bob
I went to a industrial pipe supplier. They sold the plastic pipe by
the foot, and had all the special fittings, as well as copies of the
local code, and phone numbers from the cities, and different utility
companies. Not only did they have the right materials, they were the
only source for almost 100 miles.
--
Service to my country? Been there, Done that, and I\'ve got my DD214 to
prove it.
On Sat, 22 Sep 2007 11:31:59 -0500, Ignoramus11107
They make black steel pipe with a green plastic corrosion coating,
available almost everywhere that carries black pipe.
You have to rust protect all scuffs or breaks in the pipe coating
and all joints and couplings with black plastic pipe wrap tape,
preferably with two or more coats (one before wrapping and one or two
after) of brush on protective coating to seal the tape to the pipe.
Cosmolene won't last underground, it takes a barrier solution.
Make sure to put a shutoff valve before the underground section, so
you don't have to turn off the whole house if it leaks. Make sure
it's rated for fuel gas, not all plumbing valves are. And put a tee
with a "drip leg" in front of the grill shutoff valve, so if there is
any condensation in the pipe it doesn't get into your gas grille.
You have to take a special course to buy or use the corrugated
stainless "flex line" for gas, but if you want to jump through the
hoops to buy it they do make a plastic coated version that can be
direct buried. And it will cost a bit more but install a whole lot
faster and easier.
--<< Bruce >>--
I did a similar project years ago, and also used the green coated pipe and
wrapped the joints with pipe tape. Now, apparently, my inspectors allow
galvanized pipe also, but that wasn't the case then. It apparently can be
related to your gas supply - what contaminates are in it that can corrode
galvanized pipe.
Your best bet is to talk to your gas plumbing inspector. He knows what is OK for
your area, and what he expects. You have to meet his (or her) standards to pass
the inspection. I find these people to be very helpful when making these
decisions.
Bob
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