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Black iron + pneumatics

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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Black iron + pneumatics

Unread postAuthor: Marffy » Thu Apr 15, 2010 7:47 pm

How long does it take to have a black iron pipe rust out to a point that it will be unsafe? i will be using black iron pipe for my HPA t piston and was wondering if i could expect the thing to blow up after a year of use? I will be running the gun at 300-700 psi. If it will rust out in about maybe a year, how could i slow or stop the process of it rusting out?
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Unread postAuthor: maverik94 » Thu Apr 15, 2010 8:43 pm

If you keep it dry and maintain it well, it should last you for quite a while. If you're really worried about it rusting out, just buy a galvanized pipe. It should only cost you a few cents more per piece.
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Unread postAuthor: POLAND_SPUD » Thu Apr 15, 2010 8:50 pm

personally I wouldn't feel safe using iron fittings at 700 psi... well it's all about the size you want to use.... 3/8" can probably handle it... 1/2" is probably the highest I would use

galvanised fittings and pipes cost as much regular iron ones here.. in fact they are easier to get

so I agree with maverik94... got with galvanised ones
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Unread postAuthor: Marffy » Thu Apr 15, 2010 8:59 pm

Do you think putting oil in it would help? and, what kind of chamber should i get for my psi i want if it really is this scary, a 2", 1.5", 1.25" or... ?
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Unread postAuthor: theBOOM » Thu Apr 15, 2010 9:11 pm

Hm not sure but I think I've heard of people painting the fittings with rust prevention paint... But I agree with the guys here, save yourself a big hassle and get the galv fittings.

I didn't reallyunderstand your "really is this scary" question??
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Unread postAuthor: POLAND_SPUD » Thu Apr 15, 2010 9:38 pm

@marfy
have you ever pressurised your gun to 500 psi ? I have and it 'feels' really scary... damn even 300 psi seems scary at first

so let's say that I wouldn't feel safe close to a 1" pipe at 700 psi... i know some might argue that it is almost safe but it's not something I want to be close to
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Unread postAuthor: Marffy » Thu Apr 15, 2010 10:15 pm

theBOOM wrote:
I didn't reallyunderstand your "really is this scary" question??


I wasn't saying it as a question, please re-read and you may get what it was supposed to mean...

POLAND_SPUD wrote:@marfy
have you ever pressurised your gun to 500 psi ? I have and it 'feels' really scary... damn even 300 psi seems scary at first

so let's say that I wouldn't feel safe close to a 1" pipe at 700 psi... i know some might argue that it is almost safe but it's not something I want to be close to


No i havent, its not done. :(
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Unread postAuthor: Crna Legija » Thu Apr 15, 2010 10:21 pm

i have been using im black iron pipe to connect a FE to my gun for 2 1/2 years and it hasn't rusted at all yet, but my FE has i just put some Kill Rust paint in there and shaked it around the spilled out the left over

iv been using it at 300psi for 2 months before that 150psi max
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Unread postAuthor: suburban spudgunner » Fri Apr 16, 2010 2:34 pm

I've used black iron to build a (small-bore) gun.

I've been taking it to 150 psi for several years now (probably amounting to several thousand shots), and it hasn't shown any sign of wear.
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