[TheForge] Re: morphed GAS FORGE QUESTION

[Roger Olsen]

Andy,

Did you build any special burner end where your pipe enters your forge?  If so
what, if not is your forge LOUD?

I built a burner end for mine based on a Japh Howard design.  Basically it is
'The Rosebud Concept'  the volume of air that can pass thru a 1 & 1/4" pipe.
Divide that up into individual holes the size of straws,  basically a big
rosebud.  It is truly effective and much much quieter.  A bit of work to go
thru the process involving a 1&1/4 to 3 bell,  some beeswax in the bottom of
the bell to hold the straws in place while the castable refractory sets up, a
template pattern to hold them in place on top but it is worth the trouble.
mine has been up and running with this design about 7 years.

R Olsen
__________

Gladish Family wrote:

> I'm using one of Grant Sarver's excellent squirrel cages (actually I don't
> know what a PP blower is), but it's about four times the blower I need so
> the air gate stays closed almost all the time, which might indicate that the
> air velocity is low...
> It's a real hot rod as is, this being the only issue to catch my notice. If
> I turn up the air (and gas to balance) everything goes white and steel
> starts burning.
> Thanks for your suggestions!
> Andy G.
>
> >
> > Hey Andy,
> >  Is it a squirrel cage or Positive Pressure blower?
> > I would suspect the tube is too small.
> > You might try a 2" tube with a 11/2" bell reducer on the end to
> > increase the
> > gas/ air velocity.
> > I also like to put a 1/8" S/S mesh screen between the pipe and the reducer
> > to act as a flame blow back preventer.
> > If you are concerned about low propane pressure make sure your fuel nozzle
> > points down stream in the burner tube and increase the hole size to insure
> > adequate fuel for a neutral and/or reducing flame.
> > Finally make sure the burner tip doesn't extend into the forge beyond the
> > forge wall, and pack any gaps with satenite soaked inswool to prevent the
> > forge back pressure from externally heating the burner pipe.
> > Chuck
>
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