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galvinized steel

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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galvinized steel

Unread postAuthor: veginator » Sat Jul 28, 2007 9:26 am

does anyone ave any idea what the max psi is for sch. 40 galvinized steel :?:
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Unread postAuthor: mopherman » Sat Jul 28, 2007 9:28 am

i would trust small diameter galvanized steel at 300 psi.
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Unread postAuthor: veginator » Sat Jul 28, 2007 9:30 am

about how small are you talking about?
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Unread postAuthor: mopherman » Sat Jul 28, 2007 9:42 am

up to 1.5. maybe 2
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Unread postAuthor: noname » Sat Jul 28, 2007 11:23 am

I'd trust it at 400 psi. I'd also trust it at pretty frickin high pressures, bercause I've used it with 8x/8 atm hybrid mixes.
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Unread postAuthor: DYI » Sat Jul 28, 2007 11:28 am

The burst pressure of 2" Sch 40 galvanised steel pipe is somewhere slighty over 1000psi I think. No clue on the fittings, but they are probably fine at 300 or 400psi.
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Unread postAuthor: veginator » Sat Jul 28, 2007 12:41 pm

okay its going to be my first time working with metal and i just wanted to make sure because steel shrapnel is alot worse than plastic.
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Unread postAuthor: SpudBlaster15 » Sat Jul 28, 2007 1:40 pm

Use the burst pressure formula to figure it out.

P = FS*(2*WT)/ID

P = Failure pressure (psi)
FS = Fatigue strength of the material (psi)
WT = Wall thickness (inches)
ID = Inside diameter (inches)

The fatigue strength of common hardware store steel is on the order of 15,000psi.
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Unread postAuthor: LGM » Sat Jul 28, 2007 1:41 pm

You can use pretty much anything short of solid fuels or multiple atmospheres of hydrogen or acetylene.
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Unread postAuthor: Orpackrat » Sat Jul 28, 2007 2:02 pm

I have used basic galvanized pipe and fittings from hardware stores with unregulated Co2 without any problems, they just need lots of Teflon tape.
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