[modeleng] Re: Torches & Boilers
- From: "AndyA" <AndyA@xxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 10 Jan 2006 00:51:38 -0000
HI All
What about oxy propane? A couple of people I know prefer it for boiler
making as although the flame isnt as hot it seems to have a much higher
calorific value. The following link shows the diffrences
http://www.bocindustrial.co.uk/technical/products/gases/fuel_gases/index.asp
regards
Andy
----- Original Message -----
From: "Pendragon" <idpriest@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Monday, January 09, 2006 4:39 PM
Subject: [modeleng] Re: Torches & Boilers
Al,
I've just checked and the DA is at about 7psi and the oxo at about 10 =
psi
with a number 5 nozzle, but I have only recently been silver soldering =
some
quite thin material hence the fairly small nozzle.
I all honesty I don't know what gas pressures I use [I must check]. =
When
brazing a boiler I usually go to a number thirteen nozzle.
I think the answer lies in adjusting the gas pressure so that a roaring
flame is NOT produced it seems that the pressures I use produce a quite
flame. Hope that makes sense.......But I'm sure more expert listees =
than me
would be able to give you a deffinative answer.
Regards IP
"Life should NOT be a journey to the grave with the intention of =
arriving
safely in an attractive and well preserved body, but rather to skid in
sideways, Champagne in one hand - strawberries in the other,=20
body thoroughly used up, totally worn out and screaming WOO HOO - What a
Ride!"=20
=20
"Never drive faster than your gaurdian angel can fly"
=20
Priest & Sons Model Engineers
http://www.kinvermes.pwp.blueyonder.co.uk/p1.htm
-----Original Message-----
From: modeleng-bounce@xxxxxxxxxxxxx =
[mailto:modeleng-bounce@xxxxxxxxxxxxx]
On Behalf Of Allen Messer
Sent: 09 January 2006 02:22
To: modeleng@xxxxxxxxxxxxx
Subject: [modeleng] Re: Torches & Boilers
Ian,
What pressure in psi do you set your regulators to
deliver the two gases to the torch?
Al Messer
--- Pendragon <idpriest@xxxxxxxxxxxxxxxx> wrote:
> Gents,
>=20
> I agree, I use oxy/acetylene and a soft flame does a
> far better job. =3D
> There
> are also technical reasons but I won't go into them
> at this stage.
>=20
> Regards IP
>=20
> "Life should NOT be a journey to the grave with the
> intention of =3D
> arriving
> safely in an attractive and well preserved body, but
> rather to skid in
> sideways, Champagne in one hand - strawberries in
> the other,=3D20
> body thoroughly used up, totally worn out and
> screaming WOO HOO - What a
> Ride!"=3D20
> =3D20
> "Never drive faster than your gaurdian angel can
> fly"
> =3D20
> Priest & Sons Model Engineers=20
> http://www.kinvermes.pwp.blueyonder.co.uk/p1.htm
>=20
>=20
> -----Original Message-----
> From: modeleng-bounce@xxxxxxxxxxxxx =3D=20
> [mailto:modeleng-bounce@xxxxxxxxxxxxx]
> On Behalf Of Jesse Livingston
> Sent: 08 January 2006 18:01
> To: modeleng@xxxxxxxxxxxxx
> Subject: [modeleng] Re: Torches & Boilers
>=20
>=20
> Harry, Tel, et al,
>=20
> In my experience, what little I have accumulated in
> 55 years at the=3D20
> machinist trade, the main thing with using
> oxy/acetylene torches for=3D20
> silversoldering is to make sure you have a soft
> flame. I have had =3D
> better=3D20
> luck by leaving a bit of a "feather" in the flame
> which shows an excess =3D
> of=3D20
> acetylene. This cuts down on the possibility of
> oxidizing the =3D
> copper/brass/
>=20
> steel, whatever by overheating in a localized area.
> A large welding =3D
> tip=3D20
> should work as well as a cutting or rosebud as long
> as the flame is not=3D20
> "hard" with excess oxygen. Just my two cents worth.
>=20
> Jesse in very windy/warm West Tennessee where it
> ought to be at least =3D
> cold,=3D20
> but is instead 64=3DB0F outside. My 5' x 6' US flag
> is standing straight =3D
> out=3D20
> right now.
>=20
> >>>No Harry - the cutting tip is by far the best way
> to go - Tel
> >
> > I don't dispute either of you, and I plan to
> look into this matter =3D
>=20
> > further, but still it puzzles me because in 40
> years of readings of=3D20
> > decades of resources (all the usual suspects) and
> discussions not a=3D20
> > single word of using a cutting torch for boiler
> building has ever been =3D
>=20
> > mentioned. You can
> > understand my skepticism.
> >
> > Regards,
> > Harry
>=20
> MODEL ENGINEERING DISCUSSION LIST.
>=20
> To UNSUBSCRIBE from this list, send a blank email
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> line.
>=20
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>=20
=09
__________________________________________=20
Yahoo! DSL - Something to write home about.=20
Just $16.99/mo. or less.=20
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