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safety questions

A place to ask general spud cannon related questions.
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safety questions

Unread postAuthor: pat123 » Wed Jun 18, 2008 2:31 pm

I have a few questions about my newest gun

1. is it safe to use a blowgun at 300psi
2. is it ok to use sch40 1 inch pipe as a barrel
3. i had to use a sch80 pvc coupler as part of th episton is that ok at 300psi
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Re: safety questions

Unread postAuthor: TurboSuper » Wed Jun 18, 2008 2:37 pm

pat123 wrote:I have a few questions about my newest gun

1. is it safe to use a blowgun at 300psi
2. is it ok to use sch40 1 inch pipe as a barrel
3. i had to use a sch80 pvc coupler as part of th episton is that ok at 300psi


1. The blowguns I see are rated to 70 PSI. I've used them up to 120 though, 300 may be pushing it.

2. Depends, the schedule is not a pressure rating.

3. Should be.
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Unread postAuthor: bigbob12345 » Wed Jun 18, 2008 2:44 pm

Just adding in my opinions

1. Yes, Ive pressure tested them to 600psi

2. Yes, as long as it is pressure rated

3. No
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Unread postAuthor: jackssmirkingrevenge » Wed Jun 18, 2008 2:51 pm

I think the major problem with using blowguns at high pressure is not them failing but actually using them, as usually it's the pressure that's keeping them shut.
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Unread postAuthor: psycix » Wed Jun 18, 2008 3:02 pm

1 Most blowguns can be used way above their rating. The first symptoms of overpressure are leaking and jamming. Also an O-ring may get disaligned.

2 The rating tells you what your limits are.

3 When you use a proper bumper, yes.
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Unread postAuthor: DYI » Wed Jun 18, 2008 8:55 pm

I have a few questions about my newest gun

1. is it safe to use a blowgun at 300psi
2. is it ok to use sch40 1 inch pipe as a barrel
3. i had to use a sch80 pvc coupler as part of th episton is that ok at 300psi


1. Is it a 300psi+ rated blowgun?
2. Sure, as long as it isn't PVC or any other weak, shrapnel prone material.
3. Is it inside, or outside the casing? I'm assuming it's outside, or you wouldn't have asked, so I'd say that it should be fine, but don't come crying to me if it gets your carotid artery. Remember, PVC has very low shock resistance.
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Unread postAuthor: pat123 » Fri Jun 20, 2008 3:58 pm

1. the blowgun is just a regular one i got at lowes
2. yeah it is pvc but i just found a rating on the pipe i cut it from. its rating is 330psi.
3. if i wrapped it in fiberglass would it be much stronger?
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Unread postAuthor: SpudFarm » Fri Jun 20, 2008 4:09 pm

it will be much stronger if you do like DYI did on his barrel for the MEH-20 (?)
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Unread postAuthor: POLAND_SPUD » Fri Jun 20, 2008 4:44 pm

one quick question
how safe (or not safe) would it be to use a 1/2" galvanized welded pipe with (unregulated) CO2?
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