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copper fitting

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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copper fitting

Unread postAuthor: roughboy » Mon Jul 30, 2007 6:17 pm

How much pressure can those 3/8''-1/4''-1/2'' copper fittings handle.
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Unread postAuthor: hkrivell » Mon Jul 30, 2007 6:42 pm

I asked the same question to a guy at the hardware store and he said not as much as sch40 pvc. I would double check that though.
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Unread postAuthor: mopherman » Mon Jul 30, 2007 6:47 pm

hkrivell wrote:I asked the same question to a guy at the hardware store and he said not as much as sch40 pvc. I would double check that though.

dont talk to those idiots at home cheapo. i would say at least 150 psi
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Unread postAuthor: roughboy » Mon Jul 30, 2007 7:10 pm

Also at Ace hardware that i go to i have the same problem i ask for neoprene rubber and those idiots went and got me a gasket and a plunger for the toilet. IDIOTS!!.
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Re: copper fitting

Unread postAuthor: frankrede » Mon Jul 30, 2007 7:31 pm

roughboy wrote:How much pressure can those 3/8''-1/4''-1/2'' copper fittings handle.
atleast 300 psi
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Unread postAuthor: noname » Mon Jul 30, 2007 7:34 pm

It also depends on how good you are at soldering. A hybrid using Sch 160 PVC (it's an example) could easily explode and kill the operator if the joints aren't bonded correctly.
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Unread postAuthor: boilingleadbath » Tue Jul 31, 2007 11:36 am

This comes up frequently; see the following links from copper.org:

http://www.copper.org/applications/plum ... table4.htm

http://www.copper.org/applications/plum ... able3d.htm

Copper.org does have pressure-rating tables for the pressure rated types, but I thought I'd link to DWV as an example.

Clearly, even DWV copper is rated to some pretty serious pressures.
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Unread postAuthor: DYI » Tue Jul 31, 2007 12:22 pm

So, type DWV copper in even 2" size would be a good material for low pressure (<200psi) launchers? What kind of pressure would 2" DWV copper fittings be good for?
EDIT: nvm, I found the chart.
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Unread postAuthor: spud yeti » Tue Jul 31, 2007 1:02 pm

I know this is really off topic and hijacking the thread, but since the question has already been answered and this has to do with copper, I shall proceed: Can you weld copper to copper (not solder) and copper to metal?
(Sorry for nube/hijack question, I'm not into welding very much)
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Unread postAuthor: Gepard » Tue Jul 31, 2007 1:04 pm

Copper is a metal......

You can weld copper - not easy but you can.

Michael
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Unread postAuthor: DYI » Tue Jul 31, 2007 1:21 pm

You could braze copper to another metal, I don't believe that you can weld dissimilar metals (I may be wrong though, I haven't done much welding. You can braze copper tube to copper fittings. It weakens the pipe, but makes a stronger joint (apparently you can use pressure rated copper tube and fittings of any size up to 8 inch with 120 psi steam if the joints are brazed.)
On another topic, I would really like to have some 8 inch pressure rated copper tube and fittings (wouldn't we all?)
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Unread postAuthor: spud yeti » Tue Jul 31, 2007 1:34 pm

Copper is a metal......

Oops, forgot to specify, sorry. I meant any other metal than copper (ie. steel, aluminium etc)

Thanks for the help though, it helps me a lot.

Back on topic.... :wink:
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