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I'd like to improve my copper brazing technique. (refrigerant lines)

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I'd like to improve my copper brazing technique. (refrigerant lines) james 02-05-2007
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Posted by Jeffrey Lebowski on February 6, 2007, 1:57 am

> wrote:
>
> >
> >>>
> >>>
> >>> >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.
>

Shut the fuck up, asshole.

--








Posted by on February 5, 2007, 9:29 pm

>>
>>
>> >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?


I use a number 2 tip 7psi for Acetylene 21 psi for oxygen and that
will take me thru 1-1/8 easily. Even did 1-3/8 with that setup.
silfos 15. your mileage may vary.

Posted by AKS on February 6, 2007, 6:53 pm
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

>>
>>
>> >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?
>



Posted by james on February 7, 2007, 4:37 pm
Thanks for "most" of the replies. In hindsight I feel I was not
brazing using a good systematic procedure and I also think I was being
too conservative with the heat.

I like the Copper handbook method of heating pipe, then heating pipe
AND fitting and then hitting the base of the fitting until Sil Phos
gets sucked in from capillary action. I also like their tip of
starting at the bottom of a horizontal joint in order to build a dam
and then braze up on one side and then up on the other.

I'm also going to dial up the heat a bit. I think I've been too
paranoid about burn thru and haven't been hitting it with enough
heat. The best practice seems to bring in lots of heat, braze and get
out quickly. I think I'll give a rosebud a try vs a #2 tip.

Practice makes perfect right?



Posted by AKS on February 7, 2007, 5:23 pm

> Thanks for "most" of the replies. In hindsight I feel I was not
> brazing using a good systematic procedure and I also think I was being
> too conservative with the heat.
>
> I like the Copper handbook method of heating pipe, then heating pipe
> AND fitting and then hitting the base of the fitting until Sil Phos
> gets sucked in from capillary action. I also like their tip of
> starting at the bottom of a horizontal joint in order to build a dam
> and then braze up on one side and then up on the other.
>
> I'm also going to dial up the heat a bit. I think I've been too
> paranoid about burn thru and haven't been hitting it with enough
> heat. The best practice seems to bring in lots of heat, braze and get
> out quickly. I think I'll give a rosebud a try vs a #2 tip.
>
"Practice makes perfect right?"
you got it
Dido



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