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Joining Copper

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Joining Copper

Unread postAuthor: n-strike » Mon May 19, 2008 2:42 pm

Hello, I was wondering...is there any other way to join copper besides using solder? This will probably make me look retarded, but...would PVC primer and PVC cement work? Is there any sort of adhesive or sealant that I could use besides solder to put a pneumatic gun together? If there is, (which I hope there will be) be expecting a monstrosity to be created!!!
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Unread postAuthor: LikimysCrotchus5 » Mon May 19, 2008 2:49 pm

The all knowing, all great, answer to everthing, everywhere,

EPOXY

da, dada, dum!

n-strike wrote:This will probably make me look retarded, but...would PVC primer and PVC cement work?


you answered your own question.[/quote][color=yellow]
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Unread postAuthor: trollhameran » Mon May 19, 2008 3:11 pm

use compression fittings, they just need a couple of spanners to fit
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Unread postAuthor: Maniac » Mon May 19, 2008 3:16 pm

Epoxy is probably the next best thing as LikimysCrotchus5 said in most hardware stores they usually sell a epoxy made especially for joining copper pipe. Oh and why cant you solder?
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Unread postAuthor: trollhameran » Mon May 19, 2008 3:17 pm

i would have said compression fittings were next best thing because they are meant to take high pressures
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Re: Joining Copper

Unread postAuthor: MaxuS the 2nd » Mon May 19, 2008 3:30 pm

n-strike wrote:This will probably make me look retarded, but...would PVC primer and PVC cement work?


That just made my day!

What's wrong with solder?
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Unread postAuthor: trollhameran » Mon May 19, 2008 3:31 pm

maybe he doesnt have the tools for soldering
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Unread postAuthor: MaxuS the 2nd » Mon May 19, 2008 3:37 pm

A blowtorch, flux and solder..?

I've never heard of a soul without these neccessary spudding tools.
Seriously, it'll probably cost <£10 ($20) for the whole lot. But I do know how cheap some people can be, try living in the Uk.
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Unread postAuthor: Brian the brain » Mon May 19, 2008 3:37 pm

Compression fittings served me well the first couple of years!

Galvanised fittings and pipes are a better option when it comes to reliability.
But nothing beats the look of soldered copper cannons!
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Unread postAuthor: trollhameran » Mon May 19, 2008 4:31 pm

maxus: people who live in the uk have to be cheap because theres always some sort of rule stopping you from getting money

I have to agree with Brian, soldered fittings do look better, but if your not to worried about looks, or your planning on covering the fittings then compression is great
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Unread postAuthor: n-strike » Mon May 19, 2008 4:41 pm

Sorry for not replying earlier, I was just busy. Um...I don't have the tools for soldering. And I don't have a lot of money right now, so I can still make a copper gun, but without the solder. So epoxy is the best thing to use? Can it withstand high pressures? Does anyone have a copper cannon that they have a link of right now? Sorry for all the questions, I just wanted to make sure there is not going to be a loud kablooie in my face, just like my previous cannon. That one scared that shat outta me!
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Unread postAuthor: Necrosis » Mon May 19, 2008 4:41 pm

We actually have special wire that can WELD copper. :roll:

But it's unlikely that you have this too.
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Unread postAuthor: SpudFarm » Mon May 19, 2008 4:52 pm

http://www.spudfiles.com/forums/42mm-pi ... 12595.html

simple but yet damn powerful copper gun.
this is soldered though but the plumber at your hardware store solders pipes for you if you show him how it is going to look and get the parts (witch is easy in a hardware)
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Unread postAuthor: STHORNE » Mon May 19, 2008 5:22 pm

Necrosis wrote:We actually have special wire that can WELD copper.


Welding Rod? Braising Rod?

Also, If you don't want to solder anything or use messy sealants/adhesives, then I would suggest threading your copper fittings with a tap & die set and using Teflon tape. It's easier and allows you to change something (take apart) whenever you need.
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Unread postAuthor: Carlman » Mon May 19, 2008 11:14 pm

You can get a glue called JFC (just for copper) that when done corectly can hold pressures exceeding that of the pipes rating
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