Cathy Nelson Hartman on tue 8 oct 96
I am having considerable problems with my homemade burners faking and
rusting-some of which ends up in my white porcelain. I am seeking
information about possible replacement burner pipe. Mine are 2" black gas
pipe coming out of a 4-way tee( the burner described in Rhodes book). I
wish to find a pipe that will resist the rusting and flaking. My kiln is
outdoors and open to the air.
I also would like to ask if drilling holes in the pipe would entrain more
air into the gas thus increasing combustion efficiency.
Thanks,
Walter
Walter Hartman full time studio potter since 1973
cone 10 porcelain
90% functional work
Hartman Pottery oxidation in gas kiln
1600 Willowwood sell all work at art fairs
Denton, TX 76205 work by myself
(817) 382-1083
e-mail: cnh0002@jove.acs.unt.edu
Vince Pitelka on wed 9 oct 96
At 09:10 AM 10/8/96 -0400, you wrote:
>----------------------------Original message----------------------------
>I am having considerable problems with my homemade burners faking and
>rusting. I am seeking information about possible replacement burner pipe
(the burner described in Rhodes book).
>Walter
Walter -
There are several shortcomings to the standard Alfred burners as described
in Rhodes' book. They do not have an entry bell or venturi and therefore do
not entrain air very effectively without forced air, which can be easily
added and will drastically increase the output. The other main problem is
the lack of a cast iron flame-retention tip. Steel is rolled out in the
steel mill and has a layered structure that rusts away quickly in flakes
when exposed to extreme heat. Cast iron is cast into molds and does not
tend to flake off, and therefore will last much longer when repeated exposed
to high heat. When you replace the tubes on your burners, get them threaded
on both ends, purchase some appropriate-size cast iron flame-retention tips
from Marc Ward (see his adds in any recent CM), and remount your burners so
that the end of the flame retention tip is one inch away from the front face
of the burner port on the kiln. Adding a flame retention tip will also
reduce the tendecy of the Alfred burner to backburn or flashback, where the
flame jumps back inside the tube to the orfice. Flashback drastically
contributes to the overheating of the burner tube.
- Vince
Vince Pitelka - vpitelka@Dekalb.Net
Phone - home 615/597-5376, work 615/597-6801
Appalachian Center for Crafts, Smithville TN 37166
Paul Monaghan on wed 9 oct 96
Cathy Nelson Hartman wrote:
>
> ----------------------------Original message----------------------------
> I am having considerable problems with my homemade burners faking and
> rusting-some of which ends up in my white porcelain. I am seeking
> information about possible replacement burner pipe. Mine are 2" black gas
> pipe coming out of a 4-way tee( the burner described in Rhodes book). I
> wish to find a pipe that will resist the rusting and flaking. My kiln is
> outdoors and open to the air.
>
> I also would like to ask if drilling holes in the pipe would entrain more
> air into the gas thus increasing combustion efficiency.
>
> Thanks,
> Walter
>
> Walter Hartman full time studio potter since 1973
> cone 10 porcelain
> 90% functional work
> Hartman Pottery oxidation in gas kiln
> 1600 Willowwood sell all work at art fairs
> Denton, TX 76205 work by myself
> (817) 382-1083
>
> e-mail: cnh0002@jove.acs.unt.eduWalter,
If you want a really simple solution and wish to maintain the homemade
setup substitute Stainless Steel pipe for the iron pipe. #308 is a good
alloy and will have excellent service life.
Paul Monaghan
paul@web2u.com
"Rafael Molina-Rodriguez (Rafael Molina-Rodriguez)" on wed 16 oct 96
Walter:
If you take Paul Monaghan's suggestion and go with stainless steel you
can purchase it at Haloy Industrial Supply, 11420 Chairman Drive, Dallas,
Texas, (972) 340-3199. Ask for Neil. He quoted me $ 9.87 ft for 2"
schedule 40 stainless steel.
I'm currently working on two burner systems, one for 20 cu. ft. sprung
arch hard brick downdraft and 10 cu. ft. hybrid design for low fire salt. It
has elements of Lou's MFT and the downdraft described in Rhodes "kiln"
book. In lieu of stainless steel I think I'll take Marc Wards advice and buy
flame retention nozzles.
>>> Cathy Nelson Hartman 10/08/96
08:10am >>>
----------------------------Original message----------------------------
I am having considerable problems with my homemade burners faking
and
rusting-some of which ends up in my white porcelain. I am seeking
information about possible replacement burner pipe. Mine are 2" black
gas
pipe coming out of a 4-way tee( the burner described in Rhodes book). I
wish to find a pipe that will resist the rusting and flaking. My kiln is
outdoors and open to the air.
I also would like to ask if drilling holes in the pipe would entrain more
air into the gas thus increasing combustion efficiency.
Thanks,
Walter
Walter Hartman full time studio potter since 1973
cone 10 porcelain
90% functional work
Hartman Pottery oxidation in gas kiln
1600 Willowwood sell all work at art fairs
Denton, TX 76205 work by myself
(817) 382-1083
e-mail: cnh0002@jove.acs.unt.edu
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