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Braze or solder copper refrigerant lines to fittings

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Braze or solder copper refrigerant lines to fittings henny 12-24-2006
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Posted by James on December 24, 2006, 2:56 pm
I did assume that you are doing this on your own equipment when I
recommended the silver solder. If you are pursuing a career in hvac then
you should learn to braze with mapp gas and with oxy/acet.

> It seems like the two primary methods for connecting copper to copper
> refrigerant lines to fittings are either Sil Phos 15 brazing rod or
> Stay Brite silver solder.
>
> I've done gas welding and some plumbing soldering jobs but would only
> rate myself as a novice.
>
> Which method is easier for a novice to do reliably? (Sil Phos or
> Staybrite silver solder.)
>
> I plan to do lots of practice on scrap copper pipe and fittings until
> I'm proficient. I'd like to know which method is easier to learn and
> do reliably so I have a good starting point.
>
> For brazing copper lines (3/8 to 1-1/8" in diameter) what oxy/acet tip
> do you prefer to use. (small rosebud??) Will a Turbo Torch w/ #4
> tip and MAPP gas braze using Sil Phos 15? What about the Quick
> Braze?? Is it worth getting??
>
>
>
>



Posted by Stormin Mormon on December 24, 2006, 9:27 pm
I've done both, and consider Stay-Brite 8 to be easier to use.
Zinc oxide flux, emery cloth (not in that order). Mapp torch
works nicely, the self lighting kind are very convenient.

The couple times I did brazing, it was 15% silver content sticks,
using acetylene and a turbo burner tip.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
.

> It seems like the two primary methods for connecting copper to
copper
> refrigerant lines to fittings are either Sil Phos 15 brazing
rod or
> Stay Brite silver solder.
>
> I've done gas welding and some plumbing soldering jobs but
would only
> rate myself as a novice.
>
> Which method is easier for a novice to do reliably? (Sil Phos
or
> Staybrite silver solder.)
>
> I plan to do lots of practice on scrap copper pipe and
fittings until
> I'm proficient. I'd like to know which method is easier to
learn and
> do reliably so I have a good starting point.
>
> For brazing copper lines (3/8 to 1-1/8" in diameter) what
oxy/acet tip
> do you prefer to use. (small rosebud??) Will a Turbo Torch w/
#4
> tip and MAPP gas braze using Sil Phos 15? What about the Quick
> Braze?? Is it worth getting??
>
>
>
>



Posted by on December 25, 2006, 2:36 pm

henny wrote:
>
> For brazing copper lines (3/8 to 1-1/8" in diameter) what oxy/acet tip
> do you prefer to use. (small rosebud??) Will a Turbo Torch w/ #4
> tip and MAPP gas braze using Sil Phos 15? What about the Quick
> Braze?? Is it worth getting??

Straight propane will work for sil phos. However you need to use
something like insulating firebrick to contain the heat. And if the
parts are large, you may still have problems.


Dan


Posted by Ed ke6bnl on December 25, 2006, 2:44 pm
siflos is much much easier, does take a little more heat but
cleanleness is not as important and you will be able to fill gaps
easier it will build up. no question. Ed ke6bnl

copper to steel silver soldier is your choice.


dcaster@krl.org wrote:
> henny wrote:
> >
> > For brazing copper lines (3/8 to 1-1/8" in diameter) what oxy/acet tip
> > do you prefer to use. (small rosebud??) Will a Turbo Torch w/ #4
> > tip and MAPP gas braze using Sil Phos 15? What about the Quick
> > Braze?? Is it worth getting??
>
> Straight propane will work for sil phos. However you need to use
> something like insulating firebrick to contain the heat. And if the
> parts are large, you may still have problems.
>
>
> Dan


Posted by henny on December 25, 2006, 7:45 pm
You all seem to be split as to which method is easier to learn and
more forgiving.

I do have Nitrogen so I'm not worried about oxidation. I also have
oxy/acet.tanks and equipment but the thought of using a #2 tip on soft
thin copper makes me a little nervous. (my welding skills aren't that
great so I doubt my brazing skills will be much better).

I think I'll start my practice sessions using SilPhos 15 and a small
rosebud or turbo torch.

Once again I'm simply looking for the method that's most forgiving to
a novice for a one time job and that can be readily learned via a few
practice sessions. I have no intentions of doing this for a living.

Thanks for the responses.



>siflos is much much easier, does take a little more heat but
>cleanleness is not as important and you will be able to fill gaps
>easier it will build up. no question. Ed ke6bnl
>
>copper to steel silver soldier is your choice.
>
>
>dcaster@krl.org wrote:
>> henny wrote:
>> >
>> > For brazing copper lines (3/8 to 1-1/8" in diameter) what oxy/acet tip
>> > do you prefer to use. (small rosebud??) Will a Turbo Torch w/ #4
>> > tip and MAPP gas braze using Sil Phos 15? What about the Quick
>> > Braze?? Is it worth getting??
>>
>> Straight propane will work for sil phos. However you need to use
>> something like insulating firebrick to contain the heat. And if the
>> parts are large, you may still have problems.
>>
>>
>> Dan


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