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Using different types of metals as chambers

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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Using different types of metals as chambers

Unread postAuthor: Mitchza89 » Thu Apr 10, 2008 1:14 am

G'day,

I was down at my local hardware looking for some 25mm Copper pipe that I could use as my chamber for my gun. Just my luck, they had none at all. I was wondering through the shower section and saw some Chrome plated tube shower towel rails. They were 25mm NB and fitted perfectly into a 25mm Copper fitting. I looked down the guts of the pipe and something really worried me.... I saw a seam line.

This pipe would have been perfect because it was just the right length, the right size and cheap! But I'm not sure on to what pressure it would blow out at due to the seem.

It was called "chrome plated tube" and the walls on it seemed to be not quite as thick as copper... Does anyone have an idea on what this stuff would be like? Anyone tried?
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Unread postAuthor: Carlman » Thu Apr 10, 2008 2:41 am

pretty sure thats not rated at all, its just like a towel rack or similar, ive seen them and wondered the same thing, when i asked the bunnings guy what pressure they were rated to he laughed and walked off...literally
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Unread postAuthor: Mitchza89 » Thu Apr 10, 2008 5:46 am

Yeah thought so mate....That's a real bummer....
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Unread postAuthor: Carlman » Thu Apr 10, 2008 7:51 am

yea it is aye, wouldnt mind a chrome gun! :glasses7: :walk:
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Unread postAuthor: JDP12 » Thu Apr 10, 2008 7:56 am

speaking of which, mitch- what metal do you use for your chambers? In your "Last Gun" thread, it wasn't steel, but maybe it was copper?? or bronze?
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Unread postAuthor: Hotwired » Thu Apr 10, 2008 8:46 am

Carlman wrote:yea it is aye, wouldnt mind a chrome gun! :glasses7: :walk:


You can get chromed copper in most rigid smaller sizes, just have to fork out twice the price :D
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Unread postAuthor: Lentamentalisk » Thu Apr 10, 2008 9:50 am

you could always water pressure test it... We would all appreciate it a lot
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Unread postAuthor: D_Hall » Thu Apr 10, 2008 12:15 pm

Lentamentalisk wrote:you could always water pressure test it... We would all appreciate it a lot

Problem is that the results of any such test would only be applicable for THAT piece of pipe and would not in any way shape or form be valid for somebody buying similar pipe 2 doors down the street.
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Unread postAuthor: Mitchza89 » Thu Apr 10, 2008 6:06 pm

ilovetoblowthingsup wrote:speaking of which, mitch- what metal do you use for your chambers? In your "Last Gun" thread, it wasn't steel, but maybe it was copper?? or bronze?


I just used a thread peice of galvanised steel which I polished myself. I bought the piece from my hardware shop pre-threaded :D
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