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copper cannon question
Posted: Tue Jul 17, 2012 4:47 pm
by mr.potatohead
im making a copper cannon and i must solder all the joints is there a way to make the joints where i soldered stronger and what psi may i go up to it is a coaxial canon
also
Posted: Tue Jul 17, 2012 4:54 pm
by killerbanjo
As long as you solder well you do not need to make them stronger... Depends on the copper but i think most copper is rated for about 120psi. I know BtB went to about 300psi with copper but said it felt very nasty... Im sure 200psi would be ok and 240psi is pushing it.
Posted: Tue Jul 17, 2012 5:01 pm
by sagthegreat
copper is rated for atleast 500psi, more if its type L. But when your done, start shooting at 100 psi, and bring your way up. stop were u feel safe.
Posted: Tue Jul 17, 2012 5:09 pm
by mr.potatohead
i thought copper could hold more
Posted: Tue Jul 17, 2012 5:09 pm
by jsefcik
as long as you have good joints, in school we hooked when up and pumped it up to 600 psi, but im not recommending it, stop when you think its good enough
Posted: Tue Jul 17, 2012 5:19 pm
by killerbanjo
i would not trust plumbing copper at 600 psi... I would be shitting myself.
Posted: Tue Jul 17, 2012 6:57 pm
by Gippeto
Read...
http://www.google.ca/url?sa=t&rct=j&q=c ... wB3yLmPGBQ
Tube ratings start on pg 25. Pay special attention to the note found on the bottom of page 27.
Joint ratings for various solders/brazing alloys are on page 28.
Posted: Tue Jul 17, 2012 10:08 pm
by jsefcik
killerbanjo wrote:i would not trust plumbing copper at 600 psi... I would be shitting myself.
its was pretty neat actually, but then we let all the pressure out, but we did hook a soda bottle up and start pumping =)
that was awesome!!
Re: copper cannon question
Posted: Wed Jul 18, 2012 3:45 am
by Crna Legija
mr.potatohead wrote:\ what psi may i go up to
that all depends on what type off copper pipe you the size, what solder you use, and of course how well you solder the joints.
Re: copper cannon question
Posted: Wed Jul 18, 2012 8:23 am
by jsefcik
Crna Legija wrote:mr.potatohead wrote:\ what psi may i go up to
that all depends on what type off copper pipe you the size, what solder you use, and of course how well you solder the joints.
That is very true,, if you braze it you can with stand higher pressures
Re: copper cannon question
Posted: Wed Jul 18, 2012 9:21 am
by Gippeto
jsefcik wrote:That is very true,, if you braze it you can with stand higher pressures
See my previous post...try reading it too.
Posted: Wed Jul 18, 2012 1:47 pm
by mattyzip77
Hooked on Phonics worked for me!!!!!
Re: copper cannon question
Posted: Thu Jul 19, 2012 4:12 am
by Crna Legija
jsefcik wrote:That is very true,, if you braze it you can with stand higher pressures
that could lower it because it heats up the pipe to much witch makes it weaker.
Posted: Thu Jul 19, 2012 4:47 am
by Zeus
Yeah, brazing will anneal copper, due to the temperature involved, whereas soldering doesn't usually get to those temperatures.
Posted: Thu Jul 19, 2012 5:27 am
by jsefcik
Zeus wrote:Yeah, brazing will anneal copper, due to the temperature involved, whereas soldering doesn't usually get to those temperatures.
brazing is alot better, higher pressures, your safer, look at refrigeration lines those are all brazed