[TheForge] Re: morphed GAS FORGE QUESTION

[Gladish Family]

Thanks- I'll definitely do this when I rebuild, which is inevitable since
it's made from an old ten gallon propane tank (14 ga steel?) and it's
already rotten on the ends.
I don't think it's loud, as gas forges go, but quieter would sure be worth a
bit of tinkering. It does roar a bit...
A.G.


>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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