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Running black pipe for natural gas under the deck above ground

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Mad Max

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May 24, 2015, 10:21:04 PM5/24/15
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If I want to set up a pool heater...

...and run 1" black pipe from the basement to the outside, under the
deck, above ground...

Generally no problem, with black pipe above ground, right?

MM

croy

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May 24, 2015, 10:45:43 PM5/24/15
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I have an early 1950s house in the western USA with a raised
foundation, and it has gas pipes above ground in the
crawl-space.

But your only way to know for sure is to ask the local code
authority.

--
croy

Bob F

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May 24, 2015, 10:54:41 PM5/24/15
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Galvanized can be used some places, or use plastic coated pipe, and wrap or coat
the joints for best life. Your best source of acceptable materials is the
inspector's office that inspects the installation, as Croy suggests. They will
tell you exactly what they will approve.



Uncle Monster

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May 24, 2015, 11:20:15 PM5/24/15
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A fellow from the gas company and a plumbing inspector told me that galvanized pipe is not used for natural gas because the gas reacts with the zinc. That's why you will see only black pipe or copper pipe run for natural gas. There is a newer flexible corrugated stainless steel gas line on the market that I believe is approved for use everywhere in the country. This is the last type of natural gas line I ran when I was working in the HVAC field. 8-)

http://www.gastite.com/us/products/gastite.html

[8~{} Uncle Gassy Monster

Dean Hoffman

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May 24, 2015, 11:30:15 PM5/24/15
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There's quite a bit of it on rural Nebraska. I think the
gas companies would lay it on the ground if there was a fenceline.
They would bury it if there was no fence.

cl...@snyder.on.ca

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May 24, 2015, 11:36:31 PM5/24/15
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On Sun, 24 May 2015 21:21:00 -0500, Mad Max <madma...@aool.com>
wrote:

As long as it is properly supported.

cl...@snyder.on.ca

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May 24, 2015, 11:41:44 PM5/24/15
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Some places allow galvanized pipe for low sulphuer natural gas
service.. I believe national code allows it, but some local inspection
agencies have a bird.

Uncle Monster

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May 25, 2015, 12:38:32 AM5/25/15
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I'm only familiar with Alabama Gas Company's recommendations and local gas piping code but the flexible stainless steel is very easy to install and bends around corners so I wouldn't go back to hard pipe. The labor savings makes up for the price difference in the cost of materials. Time is money. Heck, I just wish I could work again. 8-)

[8~{} Uncle Crippled Monster

Bob F

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May 25, 2015, 12:55:10 AM5/25/15
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Uncle Monster wrote:
>>
>> Galvanized can be used some places, or use plastic coated pipe, and
>> wrap or coat the joints for best life. Your best source of
>> acceptable materials is the inspector's office that inspects the
>> installation, as Croy suggests. They will tell you exactly what they
>> will approve.
>
> A fellow from the gas company and a plumbing inspector told me that
> galvanized pipe is not used for natural gas because the gas reacts
> with the zinc. That's why you will see only black pipe or copper pipe
> run for natural gas.

The last time I installed gas line, the city inspector told me galvanized was OK
here. I believe it depends on the gas used locally, so you have to check
locally.


Uncle Monster

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May 25, 2015, 1:28:42 AM5/25/15
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I seem to recall something about that now but I'd have to research which areas of the country where it's true and where the gas supply for those areas originates. Here in Alabamastan, the NG comes from several different sources including coal field methane. I've heard about landfill gas being used somewhere around here and I suppose it would need no added odorant. 8-)

[8~{} Uncle Stinky Monster

Stormin Mormon

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May 25, 2015, 6:40:41 AM5/25/15
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On 5/24/2015 10:54 PM, Bob F wrote:
> Galvanized can be used some places, or use plastic coated pipe, and wrap or coat
> the joints for best life. Your best source of acceptable materials is the
> inspector's office that inspects the installation, as Croy suggests. They will
> tell you exactly what they will approve.


I've seen a lot of black iron above ground. Residential
gas supply, and also pipes going to roof top units on
malls and stores.

Years ago, I heard that galvanized is not used for NG,
as some of the galvanize coat might flake off, and
jam the regulator. Also, I'd not want to risk crossing
(inter connecting) water and gas pipes some time in
the future.

Agree with contact the local inspector.

-
.
Christopher A. Young
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