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Science Forum Index » Engineering - Joining (Welding) Forum » I'd like to improve my copper brazing technique. (refrigeran
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| james |
 Posted: Mon Feb 05, 2007 12:05 pm |
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Guest
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I would like some tips to improve my copper pipe/copper fitting
brazing technique. I practiced yesterday afternoon on some scrap 3/4"
copper pipe and fittings and my joints are leak free but there's room
for continuous improvement. I'm not producing nice consistent fillets
even though the joints are filled.
I'm using oxy/acet, #2 tip, about 2-3 PSI, neutral to slightly
reducing flame and Sil Fos 15.
Is this configuration about right for 3/4" connections?
Do you like to start at the bottom of the joint and work your way to
the top or vice versa.
I know Sil Fos on copper to copper doesn't require a flux. However
can flux be used? (ie in order to better gauge temperature of the
joint). Will flux help achieve better joints?
Do you like to aim the torch flame towards the pipe end or the fitting
end as your sweeping back and forth? Or do you aim it perpendicular to
the axis of the pipe? Or do you like to heat the joint by going up and
down or figure 8?.
Do you actually touch to inner cone of the flame tip to the fitting or
do you back it away a little bit to reduce any chance of burn thru?
I'm using Sil Fos 15 ribbon filler. Would round work better? What
diameter?
TIA. |
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| james |
| Posted: Mon Feb 05, 2007 8:12 pm |
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Guest
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On Feb 5, 9:34 am, "-zero" <notz...@notzerozero.com> wrote:
Quote: "james" <jamesf...@gmail.com> wrote in message
news:1170691537.473528.21020@s48g2000cws.googlegroups.com...
I would like some tips to improve my copper pipe/copper fitting
brazing technique.
This will cover most questions.http://www.copper.org/resources/pub_list/pdf/soldering_brazing_ads.pdf
The other questions are kinda like... "What does it feel
like to eat Ice cream?" 10 minutes of hands-on instruction with
someone who does it everyday would be invaluable.
-zero
Thanks. That's a great link!.
What size torch tip would you use for 7/8" copper tubing and Sil Fos
15. The objective for brazing copper suggests you bring in lots of
heat, do your brazing quickly and get out. Is a # 2 Victor tip too
small?? Is so what's the optimum tip size for Oxy/Acet brazing of
refrigeration lines? |
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| Oscar_Lives |
| Posted: Mon Feb 05, 2007 8:50 pm |
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Guest
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"james" <jamesfrie@gmail.com> wrote in message
news:1170720757.625482.271950@v45g2000cwv.googlegroups.com...
Quote: On Feb 5, 9:34 am, "-zero" <notz...@notzerozero.com> wrote:
"james" <jamesf...@gmail.com> wrote in message
news:1170691537.473528.21020@s48g2000cws.googlegroups.com...
I would like some tips to improve my copper pipe/copper fitting
brazing technique.
This will cover most
questions.http://www.copper.org/resources/pub_list/pdf/soldering_brazing_ads.pdf
The other questions are kinda like... "What does it feel
like to eat Ice cream?" 10 minutes of hands-on instruction with
someone who does it everyday would be invaluable.
-zero
Thanks. That's a great link!.
What size torch tip would you use for 7/8" copper tubing and Sil Fos
15. The objective for brazing copper suggests you bring in lots of
heat, do your brazing quickly and get out. Is a # 2 Victor tip too
small?? Is so what's the optimum tip size for Oxy/Acet brazing of
refrigeration lines?
It depends. |
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| Howard |
| Posted: Mon Feb 05, 2007 9:50 pm |
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Guest
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On Tue, 06 Feb 2007 00:50:43 GMT, "Oscar_Lives" <nospam@nospam.net>
wrote:
Quote:
"james" <jamesfrie@gmail.com> wrote in message
news:1170720757.625482.271950@v45g2000cwv.googlegroups.com...
On Feb 5, 9:34 am, "-zero" <notz...@notzerozero.com> wrote:
"james" <jamesf...@gmail.com> wrote in message
news:1170691537.473528.21020@s48g2000cws.googlegroups.com...
I would like some tips to improve my copper pipe/copper fitting
brazing technique.
This will cover most
questions.http://www.copper.org/resources/pub_list/pdf/soldering_brazing_ads.pdf
The other questions are kinda like... "What does it feel
like to eat Ice cream?" 10 minutes of hands-on instruction with
someone who does it everyday would be invaluable.
-zero
Thanks. That's a great link!.
What size torch tip would you use for 7/8" copper tubing and Sil Fos
15. The objective for brazing copper suggests you bring in lots of
heat, do your brazing quickly and get out. Is a # 2 Victor tip too
small?? Is so what's the optimum tip size for Oxy/Acet brazing of
refrigeration lines?
It depends.
A lot of good that does the OP!! If you don't know anything step
aside. |
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| Jeffrey Lebowski |
| Posted: Tue Feb 06, 2007 2:57 am |
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"Howard" <no@spam.com> wrote in message
news:mknfs2hk8cgn7p07tdnu6vnldsdm72dn7i@4ax.com...
Quote: On Tue, 06 Feb 2007 00:50:43 GMT, "Oscar_Lives" <nospam@nospam.net
wrote:
"james" <jamesfrie@gmail.com> wrote in message
news:1170720757.625482.271950@v45g2000cwv.googlegroups.com...
On Feb 5, 9:34 am, "-zero" <notz...@notzerozero.com> wrote:
"james" <jamesf...@gmail.com> wrote in message
news:1170691537.473528.21020@s48g2000cws.googlegroups.com...
I would like some tips to improve my copper pipe/copper fitting
brazing technique.
This will cover most
questions.http://www.copper.org/resources/pub_list/pdf/soldering_brazing_ads
..pdf
Quote:
The other questions are kinda like... "What does it feel
like to eat Ice cream?" 10 minutes of hands-on instruction with
someone who does it everyday would be invaluable.
-zero
Thanks. That's a great link!.
What size torch tip would you use for 7/8" copper tubing and Sil Fos
15. The objective for brazing copper suggests you bring in lots of
heat, do your brazing quickly and get out. Is a # 2 Victor tip too
small?? Is so what's the optimum tip size for Oxy/Acet brazing of
refrigeration lines?
It depends.
A lot of good that does the OP!! If you don't know anything step
aside.
Shut the fuck up, asshole.
-- |
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| AKS |
| Posted: Tue Feb 06, 2007 7:53 pm |
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Guest
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If you want to learn how to braze you will need to find
some one who have some experience, torch tips don't
mean nothing it is better if you have right tools
no one will denied that but good braze can be done
practically with any torch that can give heat needed.
Sil-Fos I use cheapest one I can purchase and I never had
any problems on any size of copper pipe,
if you are going to be brazing coppernickle or (cupronickel)
and brass then yes you should use 15% silver you will find it
much easier to work with. main thing is that joints are clean fluxed
and don't over heat don't apply heat directly on to Sil-Fos
applied heat in direction you want sil-fos to flow
and wait for joint to be hot enough before you apply
how hot well when color start to change from dark to
perhaps little reddish remember I said reddish not red
sil-fos, also remember sil-fos will oxidize if is over heated.
From Dido
"james" <jamesfrie@gmail.com> wrote in message
news:1170720757.625482.271950@v45g2000cwv.googlegroups.com...
Quote: On Feb 5, 9:34 am, "-zero" <notz...@notzerozero.com> wrote:
"james" <jamesf...@gmail.com> wrote in message
news:1170691537.473528.21020@s48g2000cws.googlegroups.com...
I would like some tips to improve my copper pipe/copper fitting
brazing technique.
This will cover most
questions.http://www.copper.org/resources/pub_list/pdf/soldering_brazing_ads.pdf
The other questions are kinda like... "What does it feel
like to eat Ice cream?" 10 minutes of hands-on instruction with
someone who does it everyday would be invaluable.
-zero
Thanks. That's a great link!.
What size torch tip would you use for 7/8" copper tubing and Sil Fos
15. The objective for brazing copper suggests you bring in lots of
heat, do your brazing quickly and get out. Is a # 2 Victor tip too
small?? Is so what's the optimum tip size for Oxy/Acet brazing of
refrigeration lines?
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| Bob Engelhardt |
| Posted: Wed Feb 07, 2007 3:21 pm |
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Guest
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Jeffrey Lebowski wrote:
Quote: Shut the fuck up, asshole.
[The original post included alt.hvac] While crossposting will reach a
greater audience, there may be some in that audience that you'd rather
not hear from.
It's good to have a reminder every now and then of the civility we enjoy
at SEJW (& RCM). Bob |
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| Guest |
| Posted: Tue Feb 13, 2007 1:33 am |
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On 2月6日, 上午12时05分, "james" <jamesf...@gmail.com> wrote:
Quote: I would like some tips to improve my copper pipe/copper fitting
brazing technique. I practiced yesterday afternoon on some scrap 3/4"
copper pipe and fittings and my joints are leak free but there's room
for continuous improvement. I'm not producing nice consistent fillets
even though the joints are filled.
I'm using oxy/acet, #2 tip, about 2-3 PSI, neutral to slightly
reducing flame and Sil Fos 15.
Is this configuration about right for 3/4" connections?
Do you like to start at the bottom of the joint and work your way to
the top or vice versa.
I know Sil Fos on copper to copper doesn't require a flux. However
can flux be used? (ie in order to better gauge temperature of the
joint). Will flux help achieve better joints?
Do you like to aim the torch flame towards the pipe end or the fitting
end as your sweeping back and forth? Or do you aim it perpendicular to
the axis of the pipe? Or do you like to heat the joint by going up and
down or figure 8?.
Do you actually touch to inner cone of the flame tip to the fitting or
do you back it away a little bit to reduce any chance of burn thru?
I'm using Sil Fos 15 ribbon filler. Would round work better? What
diameter?
TIA.
Zhejiang xinyu fittings co.,ltd is the manufacture specialized in
producing and exporting the HAVC & Plumbing products ,including the
copper fittings, brass fittings,pex fittings, sprinkle heads, air-
condition and refrigeration spare parts. Products follows
International Standard YTG 03-97, British Standard BS864-2/EN1254,
American Standard ASME B16.22 and China Standard GB/T 11618-1999.
Right now, our main markets are SoutheastAsia North American
European and Middle east.
www.xinyu-fittings.com |
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