Vince Pitelka on fri 12 aug 05
PotterMark wrote:
"I've just relocated my Alpine kiln - at the old location had a solid 2" gas
line bringing natural gas from the meter to the kiln, over a fair distance.
I got great pressure and all was good. I'm moving the kiln to a location
where there is only a 1" line that runs about 25 feet to a gas main inside
a large industrial building."
Mark -
A gauge on the line would at least tell you what line pressure you have to
work with, but if I were you, I would start out with a PSI gauge. This gas
line is in a large industrial building, and thus there is a good chance that
the pressure is considerably higher than the standard home gas pressure of 7
WCI. See if you can borrow a gauge that goes up to ten or fifteen PSI and
try that on the line. If it doesn't register, or if the needle barely
moves, then try your WCI gauge. Industrial gas line pressure is often 1/2
PSI or more, whereas household pressure of 7 WCI is only 1/4 PSI. That 1/2
PSI would double the amount of gas traveling thorugh that 1" line, and even
with a 25' run it would likely be more than adequate for your kiln.
Good luck -
- Vince
Vince Pitelka
Appalachian Center for Craft, Tennessee Technological University
Smithville TN 37166, 615/597-6801 x111
vpitelka@dtccom.net, wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
Potter, Mark on fri 12 aug 05
I've just relocated my Alpine kiln - at the old location had a solid 2" =
gas line bringing natural gas from the meter to the kiln, over a fair =
distance. I got great pressure and all was good.
I'm moving the kiln to a location where there is only a 1" line that =
runs about 25 feet to a gas main inside a large industrial building.
Does anyone know of a test I can use to determine if pressure/volume of =
gas flow would be enough with the 1" line to rn the kiln, or at least to =
make it worth trying?
I have a pressure guage I can hook up. Suppose I hook it up and I see =
that I have 4" of water column pressure. Does that mean I'm ok to go? Or =
do I neeed a certain pressure in the line with the end of the gas line =
wide open??
Or, can anyone say definitively, a 1" line will not work with an HF-24, =
don't waste your time, start running the 2".
I have a call into Alpine about this, but any experience that you may =
have out there would help.=20
thanks,
Mark Potter
mark@visionage.net
_________________________________________________________________________=
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Louis Katz on fri 12 aug 05
What is the pressure on the line. 1 inch is fine if it is bringing gas
to your kiln at a high enough pressure.
All the alpines I have fired have worked at under 3". I would be
tempted to :
First find out what you have.
then:
a. calll alpine
b. call a gas utility and ask an engineer.
c. try it.
d. build a test set of orifices same size as your kilns and try it with
a pressure gauge upwind of the orifices a foot or so so you can see the
pressure drop. Don't blow yourself up.
Mark ward may be able to help you.
Louis
On Aug 12, 2005, at 9:09 AM, Potter, Mark wrote:
> I've just relocated my Alpine kiln - at the old location had a solid
> 2" gas line bringing natural gas from the meter to the kiln, over a
> fair distance. I got great pressure and all was good.
>
> I'm moving the kiln to a location where there is only a 1" line that
> runs about 25 feet to a gas main inside a large industrial building.
>
> Does anyone know of a test I can use to determine if pressure/volume
> of gas flow would be enough with the 1" line to rn the kiln, or at
> least to make it worth trying?
>
> I have a pressure guage I can hook up. Suppose I hook it up and I see
> that I have 4" of water column pressure. Does that mean I'm ok to go?
> Or do I neeed a certain pressure in the line with the end of the gas
> line wide open??
>
> Or, can anyone say definitively, a 1" line will not work with an
> HF-24, don't waste your time, start running the 2".
>
> I have a call into Alpine about this, but any experience that you may
> have out there would help.
>
> thanks,
>
> Mark Potter
> mark@visionage.net
>
> _______________________________________________________________________
> _______
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
> _______________________________________________________________________
> _______
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
>
Hank Murrow on fri 12 aug 05
On Aug 12, 2005, at 7:09 AM, Potter, Mark wrote:
> I've just relocated my Alpine kiln - at the old location had a solid
> 2" gas line bringing natural gas from the meter to the kiln, over a
> fair distance. I got great pressure and all was good.
>
> I'm moving the kiln to a location where there is only a 1" line that
> runs about 25 feet to a gas main inside a large industrial building.
>
> Does anyone know of a test I can use to determine if pressure/volume
> of gas flow would be enough with the 1" line to rn the kiln, or at
> least to make it worth trying?
>
> I have a pressure guage I can hook up. Suppose I hook it up and I see
> that I have 4" of water column pressure. Does that mean I'm ok to go?
> Or do I neeed a certain pressure in the line with the end of the gas
> line wide open??
>
> Or, can anyone say definitively, a 1" line will not work with an
> HF-24, don't waste your time, start running the 2"
Say, Mark;
The gas company has tables that will show the volume you can expect
from your line at various pressures, and Alpine can tell you what
volume you will need. The rest is just arithmetic.
Good luck, Hank
> www.murrow.biz/hank
William & Susan Schran User on fri 12 aug 05
On 8/12/05 10:09 AM, "Potter, Mark" wrote:
> I have a pressure guage I can hook up. Suppose I hook it up and I see that I
> have 4" of water column pressure. Does that mean I'm ok to go? Or do I neeed a
> certain pressure in the line with the end of the gas line wide open??
A quick look at Minnesota Clay web site > Alpine gas kilns indicates a
requirement of 6" wcp at the burners and 10-12" wcp at source.
Your gas supplier could probably answer your question about supplying
adequate pressure and line size needed.
--
William "Bill" Schran
Fredericksburg, Virginia
Dave Finkelnburg on fri 12 aug 05
Mark,
I have been through virtually the same process you describe. The best way I found to proceed was I assumed the most my kiln would require would be about 1.2-million BTU's/hour, and that I needed a pressure that would supply that through a 1-inch line. I told my gas company the fuel load and the line size and length and they told me what pressure was necessary. It fit with a particular, larger gas meter, which they agreed to supply and I bought a particular pressure reducer to use at the other end to get the right pressure for the burners.
Even though I am an experienced process engineer who has done a lot of gas-flow, pressure drop calculations, in this case I felt it was only prudent to involve the gas company and my contractor, who would install the gas line and regulator. When they agreed on the solution I felt confident it would work, and it has worked very well.
We did discuss a different combination--lower gas pressure and larger line size--but it would have cost me more money, overall.
You want an installation that gives you enough pressure when the kiln is firing. Any pressure measurement you make will only be useful if you make it while the line is flowing the maximum amount of gas that will go through it. If the line is used to supply gas heaters, for example, you may need to know what the supply pressure is in that line in very cold weather. Also, on the discharge end you need to know the pressure when you have enough gas coming out of the line to fire your kiln.
I hope this is helpful.
Dave Finkelnburg, vacationing in Idaho for a few days...
"Potter, Mark" wrote:
I've just relocated my Alpine kiln - at the old location had a solid 2" gas line bringing natural gas from the meter to the kiln, over a fair distance. I got great pressure and all was good.
I'm moving the kiln to a location where there is only a 1" line that runs about 25 feet to a gas main inside a large industrial building.
Does anyone know of a test I can use to determine if pressure/volume of gas flow would be enough with the 1" line to rn the kiln, or at least to make it worth trying?
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