On Mon, 20 Dec 2004 08:51:52 -0700, Tim Killian
wrote:
Bernd wrote:
wrote in message
oups.com...

I'm toying with the idea of running a buried natural gas line out to
the garage for a hot air furnace as well as my foundry furnace (now
propane)

Now that everybody has given you the answers to code problems and other
such stuff, there's one problem with using the natural gas with your
foundry furnace. After the gas goes through the meter it comes out at
about, IIRC, at 7psi or something like that. Not enough pressure and
volume to run a foundry furnace.

Natural gas from the meter is regulated at 7 inches water column --
about 1/2 psi. If the meter can supply the required volume in cuft/hr,
it will run kilns and furnaces.

If you connect it, it will work. But the pipe will be whistling at
very high flow rates, and pressure drop becomes a bigger problem.

If you can get the local gas company to do it, they can deliver the
gas from their regulator and gas meter at 5 or 10 PSI instead of 7" WC
/ ~1/2 PSI, and then you use a second pressure regulator near the
appliance to knock it down to 7" WC. That allows you to flow a lot
more gas for the pipe size and distance involved.

But this is usually used for commercial and industrial applications,
getting a medium-pressure feed done at a residence - even if only for
the line back to the garage workshop - may be a huge problem.

-- Bruce --
--
Bruce L. Bergman, Woodland Hills (Los Angeles) CA - Desktop
Electrician for Westend Electric - CA726700
5737 Kanan Rd. #359, Agoura CA 91301 (818) 889-9545
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