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what if I .....?

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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what if I .....?

Unread postAuthor: sniper hero » Sun Mar 23, 2008 12:30 pm

ï'm making a gun of copper and I was wondering what would happen if I put too much pressure on it (it's soldered)
would it explode with a bang or would an elbow fly of or just start to leak a lot?
i'm don't use a compressor so it might be impossible to put too much pressure.?

edit:sorry for posting in combustion discussion
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Unread postAuthor: pizlo » Sun Mar 23, 2008 12:54 pm

If you are using a pump I highly doubt you could break a soldering job. If you're soldering is good, I heard the number somewhere but it will definantly hold to over 500 PSI. If its not good, but doesn't already leak, then an elbow will probably blow. For it not to blow it must be leaky at lower pressures.
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Unread postAuthor: Gippeto » Sun Mar 23, 2008 1:22 pm

The strength of a PROPERLY done solder joint still has variables.

using 50-50 / lead - tin, joints up to 1" are rated @ 200psi

using 95-5 / Tin - Antimony, joints up to 1" are rated @ 1090psi

(taken from the copper handbook pg.28 )

Download the copper handbook, it is worth reading and keeping as a reference.

http://www.copper.org/resources/pub_lis ... ndbook.pdf
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Unread postAuthor: sniper hero » Sun Mar 23, 2008 5:39 pm

ok thanx I thought it would be too high to pump but still I was curious.
i'm using 50-50 tin-lead but I don't use high pressure (now not more then 6 bar later more)
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