John Rodgers on fri 7 jul 00
John, you might give ordinary galvanized chimney stack metal a try. Comes int 3
foot lengths. The trick is to put a liner in it. This is what I used on the 90 Cu.
Ft kiln I had in Alaska, and was suggested by Nils Lou. I got my liners from a
place by the name of Fire Brick Company, as I recall. I put the stack up to 12
feet, and as I added each 3ft section I would drop three 12 liner sections down the
pipe, then add the next pipe section. Was easy to erect.
Good luck.
John Rodgers
Birmingham, AL
John Weber wrote:
> I am in the process of trying to complete the building of a miniature of my
> 70cu ft gas downdraft kiln, but have run amuck. The stack I use for the big
> kiln is a steel culvert that seems to work fine but for this smaller kiln (5
> Cu Ft) there doesn't seem to be any culverts of that size. I tried to use a
> small gas fireplace double walled stack from the local hardware - I melted
> the inner wall. Next I plan to go to a stove pipe but I think the specs only
> allow for 1000F over 6-7 hours. So, does anyone have any suggestions on what
> type of material could be used for the stack on this little kiln. I probably
> need 8-9 feet of stack at least 6-7 inches inside diameter. John Weber in
> Manakin-Sabot, Virginia
>
> ______________________________________________________________________________
> 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.
John Weber on fri 7 jul 00
I am in the process of trying to complete the building of a miniature of my
70cu ft gas downdraft kiln, but have run amuck. The stack I use for the big
kiln is a steel culvert that seems to work fine but for this smaller kiln (5
Cu Ft) there doesn't seem to be any culverts of that size. I tried to use a
small gas fireplace double walled stack from the local hardware - I melted
the inner wall. Next I plan to go to a stove pipe but I think the specs only
allow for 1000F over 6-7 hours. So, does anyone have any suggestions on what
type of material could be used for the stack on this little kiln. I probably
need 8-9 feet of stack at least 6-7 inches inside diameter. John Weber in
Manakin-Sabot, Virginia
LFOXPASS@AOL.COM on fri 7 jul 00
John,
Thermal Ceramics sells a product call "riser sleeves", which are rigidized
fiber cylinders 12" in height and approx. 1/2 inch wall thickness. Nils Lou
recommends these for his flattops. They can be purchased in a variety of
diameters. I use a heavy guage air-conditioning duct and just drop the
sleeves down in the duct as a liner. They stand both the heat and the
weather. I have some I've used over 20 years.
Thermal Ceramics' Houston office fax is 713-680-9070, phone is 713-680-8182
Disclaimer!--I have no financial interest in Thermal Ceramics, only a
satisfied customer!
Jim Larkin
Fox Pass Pottery
Hot Springs, Arkansas71901
501-623-9906
lfoxpass@aol.com
Jennifer F Boyer on fri 7 jul 00
Hi John,
Mel mentioned stack liners. I got mine from a refractory supply
place near us that supplies the boiler building/repair industry.
Look in the yellow pages under boilers. They carry bricks,
fiberfax, etc. But you won't find them listed under anything to
do with clay....
Good Luck!
Jennifer, fondly remembering jamming the liners into the culvert
( :-( ) , and glad I'm done with it. Works great now.
John Weber wrote:
>
> I am in the process of trying to complete the building of a miniature of my
> 70cu ft gas downdraft kiln, but have run amuck. The stack I use for the big
> kiln is a steel culvert that seems to work fine but for this smaller kiln (5
> Cu Ft) there doesn't seem to be any culverts of that size. I tried to use a
> small gas fireplace double walled stack from the local hardware - I melted
> the inner wall. Next I plan to go to a stove pipe but I think the specs only
> allow for 1000F over 6-7 hours. So, does anyone have any suggestions on what
> type of material could be used for the stack on this little kiln. I probably
> need 8-9 feet of stack at least 6-7 inches inside diameter. John Weber in
> Manakin-Sabot, Virginia
>
> ______________________________________________________________________________
> 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.
--
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer jboyer@adelphia.net
Thistle Hill Pottery
Vermont USA
http://www.thistlehillpottery.com/
Check out these sites about web hoaxes:
http://urbanlegends.about.com/culture/urbanlegends/mbody.htm
http://www.stiller.com/hoaxes.htm
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Nils Lou on fri 7 jul 00
John, I have used ordinary stovepipe (get the thickest you can find). Wash
it down with clorox and wipe (with brush or rag) inside and outside with
ITC 213. My current stack is on a small train wood burner and is intact
after six firings even glowing red. Also, a small stack as you describe is
pretty cheap. Even if you didn;t coat it it would survive for awhile. I
suspect it would rust away before it would melt. Just don't wrap it with
insulation as that will accelerte decay. Air is the best coolant. Try it.
BTW, the reason you melted out the inside of the double wal is for
precisely the reason I've described--it was not allowed to cool with air.
Nils
On Fri, 7 Jul 2000, John Weber wrote:
> I am in the process of trying to complete the building of a miniature of my
> 70cu ft gas downdraft kiln, but have run amuck. The stack I use for the big
> kiln is a steel culvert that seems to work fine but for this smaller kiln (5
> Cu Ft) there doesn't seem to be any culverts of that size. I tried to use a
> small gas fireplace double walled stack from the local hardware - I melted
> the inner wall. Next I plan to go to a stove pipe but I think the specs only
> allow for 1000F over 6-7 hours. So, does anyone have any suggestions on what
> type of material could be used for the stack on this little kiln. I probably
> need 8-9 feet of stack at least 6-7 inches inside diameter. John Weber in
> Manakin-Sabot, Virginia
>
> ______________________________________________________________________________
> 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.
>
DONALD G. GOLDSOBEL on fri 7 jul 00
I had a 12 cu ft fiber downdraft and for the stack I used double walled
stove pipe with 8" ID ceramic fiber liners. Several manufacturers make
them. They will withstand most weather conditions.
good luck
Donald
At 08:33 AM 07/07/2000 -0400, you wrote:
>Hi John,
>Mel mentioned stack liners. I got mine from a refractory supply
>place near us that supplies the boiler building/repair industry.
>Look in the yellow pages under boilers. They carry bricks,
>fiberfax, etc. But you won't find them listed under anything to
>do with clay....
>Good Luck!
>Jennifer, fondly remembering jamming the liners into the culvert
> ( :-( ) , and glad I'm done with it. Works great now.
>
>John Weber wrote:
>>
>> I am in the process of trying to complete the building of a miniature of my
>> 70cu ft gas downdraft kiln, but have run amuck. The stack I use for the big
>> kiln is a steel culvert that seems to work fine but for this smaller
kiln (5
>> Cu Ft) there doesn't seem to be any culverts of that size. I tried to use a
>> small gas fireplace double walled stack from the local hardware - I melted
>> the inner wall. Next I plan to go to a stove pipe but I think the specs
only
>> allow for 1000F over 6-7 hours. So, does anyone have any suggestions on
what
>> type of material could be used for the stack on this little kiln. I
probably
>> need 8-9 feet of stack at least 6-7 inches inside diameter. John Weber in
>> Manakin-Sabot, Virginia
>>
>>
______________________________________________________________________________
>> 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.
>
>--
>~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
>Jennifer Boyer jboyer@adelphia.net
>Thistle Hill Pottery
>Vermont USA
>http://www.thistlehillpottery.com/
>
>Check out these sites about web hoaxes:
>http://urbanlegends.about.com/culture/urbanlegends/mbody.htm
>http://www.stiller.com/hoaxes.htm
>~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
>
>___________________________________________________________________________
___
>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.
>
John Weber on sun 9 jul 00
Thanks to everyone who responded. I got the stove pipe and it worked (still
standing after Cone 10) but I'm out to find the liners and larger pipe to put
the liners into.
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