Is there a rule of thumb for flaring copper tubing?

[Caulki...@work.com]

I have some 1/4" ID (About 3/8" OD) soft copper tubing to flare for
propane connections. I've done a lot of plumbing, but flaring is
something I've seldom done. I know that to get a proper flare, the
amount of pipe sticking out of the flaring tool is important. And I
believe this amount is determined by the diameter size of the tubing.


Well, I went and googled it, and found this site:
http://www.copper.org/applications/plumbing/cth/cth_8flrdjts.html

A good article, but they say to "Adjust the height of the tube in the
opening in accordance with the tool manufacturer's instructions, to
achieve sufficient length of the flare."

Well, my flaring tool is something I bought about 30 years ago. It sits
in my plumbing toolbox most of the time, unused. I dont have
instructions anymore.......

There must be some sort of a rule of thumb for how much sticks out of
the flaring tool, for each size of tubing. Anyone know what it is?

[Stormin Mormon]

I've had reasonable results with put the tubing flush with the top of
the flat bar. Nothing sticks out.

--
.
Christopher A. Young
Learn about Jesus
www.lds.org
.

[cl...@snyder.on.ca]

GENERALLY the thickness of the anvil used for a double flare is the
amount of tubing needed to extend past the "clamp" when making a
double flare - and should be about right for asingle flare as well.

[jamesgang]

For the low pressures of propane I don't think it's too critical. Experiment. I presume you are doing a single flare? You want as much flare as will fit easily in the female end. Too much flare and you can't get it in.

[Stormin Mormon]

On 12/3/2013 8:21 AM, cl...@snyder.on.ca wrote:

> GENERALLY the thickness of the anvil used for a double flare is the
> amount of tubing needed to extend past the "clamp" when making a
> double flare - and should be about right for asingle flare as well.
>

Height of the anvil is way too much when single flaring.

[cl...@snyder.on.ca]

On Tue, 03 Dec 2013 15:54:59 -0500, Stormin Mormon
<cayo...@hotmail.com> wrote:

>On 12/3/2013 8:21 AM, cl...@snyder.on.ca wrote:
>
>> GENERALLY the thickness of the anvil used for a double flare is the
>> amount of tubing needed to extend past the "clamp" when making a
>> double flare - and should be about right for asingle flare as well.
>>
>
>Height of the anvil is way too much when single flaring.

I haven't done a single flare in over 20 years - all kinds of double
and bubble flares - both aviation standard and automotive.

[Stormin Mormon]

Please accept my word for it, different technique for single flare.