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Copper tubing burst (Type M)

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 tubing burst (Type M)

Unread postAuthor: boyntonstu » Wed Jul 01, 2009 11:51 am

Copper tubing burst (Type M)

Have you knowledge of what happens with respect the shrapnel?

How does copper compare a PVC burst?
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 01, 2009 11:56 am

You're unlikely to get shrapnel unless you load it with high explosive, it will probably stretch and tear.
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Unread postAuthor: twizi » Wed Jul 01, 2009 12:00 pm

i agree with jack it would be like a water bottle blowin up
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Unread postAuthor: jackssmirkingrevenge » Wed Jul 01, 2009 12:13 pm

Not gas pressure related but this is what happenedwith my copper barrel in a BB auto.

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Unread postAuthor: boyntonstu » Wed Jul 01, 2009 12:24 pm

jackssmirkingrevenge wrote:Not gas pressure related but this is what happenedwith my copper barrel in a BB auto.

Image


I can live with that.

According to the charts, Type M is way up there in bursting PSI.

Makes me wonder why do folks use steel chambers?
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Unread postAuthor: Hotwired » Wed Jul 01, 2009 12:55 pm

1) Steel is a lot cheaper than copper

2) Even higher pressure ratings plus its extra strength and hardness takes abuse better. Copper tends to deform rather easily -_-


Flared the tip of my copper barrel once when firing a solid plastic slug at very close range, the slug didn't clear the barrel before impacting the target and expanded INSIDE the barrel tip.

It's annoying because my barrels have to be nigh-on perfectly straight and smooth due to the way it's attached - sliding through very close fitting T's, a deformation like that mucks it all up and its back to sorting through the stock at a DIY place for another "perfect" barrel.
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Unread postAuthor: UKSGC » Wed Jul 01, 2009 5:12 pm

I can tell you from personal experience that copper will take insane pressures and all that happens it it tears. Just the memory of the noise made by copper ripping itself apart at 30bar in a classroom still makes me shudder. The whole class was partially deaf for a few days.
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Unread postAuthor: dudeman508 » Wed Jul 01, 2009 7:35 pm

How did that go with your teacher?
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Unread postAuthor: Hotwired » Wed Jul 01, 2009 7:39 pm

dudeman508 wrote:How did that go with your teacher?


Or even:

How did that go with your students?

:P
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