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Old 04-29-2014, 05:38 PM  
kok328
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Yes, it is pressurized, 50psi. Job is on hold for now, missed my window.
Got it all layed out and once the insulation was removed from the pipe, it doesn't look all that intimidating.
I'll let ya know how it goes.



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Old 04-30-2014, 11:36 AM  
Wuzzat?
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Quote:
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50psi
So there's 350 lbs trying to separate the joint you will solder and if you have water hammer it will spike much higher.


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Old 04-30-2014, 12:03 PM  
nealtw
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Anyone have any experience sweating 3" copper pipe?

I'm not sure about the piping but, I plan to use a 3", Type M, coupler and was wondering if MAPP gas with a Bernzo-matic head will be sufficient to heat that much pipe.
Talked to a plumber who pointed out that the newer solder needs a lot more heat than the old lead did.

I found a good discussion at the handyman site.
http://handymanwire.com/ubbthreads/ubbthreads.php/topics/225885/How_to_solder_a_3_inch_copper_
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Old 04-30-2014, 12:11 PM  
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Talked to a plumber who pointed out that the newer solder needs a lot more heat than the old lead did.

I found a good discussion at the handyman site.
http://handymanwire.com/ubbthreads/ubbthreads.php/topics/225885/How_to_solder_a_3_inch_copper_
I saw that site. They were a lot more helpful than the formal handbooks on the subject.

Most Web hits dealt with pipe 3/4" and under and almost anybody can figure that job out.

There's BTUs/hr delivered to the joint and there's flame temperature and there is the melting point of solder and the melting point of copper.

And then there's
http://en.wikipedia.org/wiki/Cool_flame
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Old 04-30-2014, 02:17 PM  
kok328
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No just 50psi in the system. I have MAPP gas and MAPP torch heads. I will be running 2 torches so heat shouldn't be an issue for the lead-free solder.
I also plan on installing a VFD controller to alleviate water hammering.

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Old 05-05-2014, 05:44 PM  
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MAPP torch on each side, sweats up just like 3/4".
Just takes a little longer to heat up.
Almost looked like I knew what I was doing

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Old 05-05-2014, 05:55 PM  
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Love it when the plan comes together...



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