Re: [Distillers] Re: bending copper tubing/ ok
- Grayson Stewart <grayson_stewart66@...> wrote:
--- In Distillers@yahoogroups.com, stephen gardipee
> Does anyone have any simple, yet specific information on annealingcopper tubing.
With alot of help, I just recently got the pictures of my condensor
loaded up in the photo section under grayson_stewart.
After wasting several lengths of tubing I finally followed the
advice I had been given and filled the tubing with salt. It takes a
little time to make sure it is completley filled but well worth the
effort. Nobody wants a flat kink halfway through a perfect
condensor! I then heated the tubing as I twisted it around a broom
I simply heated my salt filled tubing with a propane torch. Placed
hottest part of the flame (blue tip) along the straight tubing
closest to the broom handle and ran it over a segment about 8 to 10
inches. Needless to say, you will want leather gloves while doing
True annealing is when heat is applied to the metal to remove any
cold hardening and realign the microscopic lattice structure of the
metal making the metal more mallable. What I was doing with the
propane torch is simply softening the metal to make it easier to
bend. Making it easier to bend gives you more control in making
Now when I say softening, it definately isn't going to become limp -
but it will be easier to form the tight coils required. I still
took a break every ten coils or so to rest my forearms.
Copper is a great conductor and readily dissipates the heat, so I
only heated enough of the material to form two or three coils that
you can see in the pictures and then reheated another short segment
to continue making more coils.
Just as with anything else, you will need to play with it to get a
feel for the way it should work. If it's still too difficult to
form, heat a little longer or try heating a smaller portion and only
work one coil, then repeat for another coil.
I seriously doubt you would get enough heat from the oven to do alot
of good and, if your doing a condensor, all that heat stored in the
metal will quickly dissipate....besides, I know I wouldn't want to
work with 20 feet of 500 degree F metal.
Thank you Grayson..I appreciate the help.
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