Steel galvanized pipes as pcp rifle air chamber

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Dembouz921
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Wed May 25, 2022 3:44 am

Is it safe to put like 1500/2000psi inside a standart 3/4 steel galvanized pipe you find in hardware store, if this works it would be more convenient than buying paintball tank bottle. The only downside is to find some 3/4 to 1/8 adaptor to screw the fill valve in.
FerdBlu
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Wed May 25, 2022 5:58 am

Joerg Sprave did some airbows using these pipes. They hold the pressure, but i would still buy a paintballtank. Your safety is definitely worth more than the 80 bucks for a pcp bottle
Dembouz921
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Wed May 25, 2022 9:05 am

I've checked, he use them with 4500 psi, using them with 2000 psi should be safe.
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mrfoo
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Wed May 25, 2022 1:37 pm

1500 psi is above the rated pressure for the pipe, which is closer to 750psi. Although it *probably* won't unexpectedly burst at that pressure, but you've blown away any safety margin you have, so any minor damage could be catastrophic. But rather than the pipe itself, I'd be very worried about threaded fittings, which are generally rated at about half of that 750psi. Good chance of endcaps going ballistc.
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Moonbogg
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Fri May 27, 2022 6:04 pm

At pressures that high, I would definitely buy something rated for it. I'd be too paranoid to enjoy using the thing. Aren't those galvanized steel caps casted? I don't like the idea of casted, crappy threads. If I was designing a hand-held device for 1500psi I'd actually design it for like 10,000psi and then test it at like 3000psi and still be too paranoid to enjoy using it. Then again, I'm more of a traditional spud-gun kind of guy, so after around 2-300psi I tap out anyway.
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