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Pvc chamber heating system?

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Unread postAuthor: john bunsenburner » Thu Oct 30, 2008 3:23 pm

Get an old vacume cleaner and an electric heating coil then switch the motor round so it blows and not sucks and blocw hot air through the system, you could always use the same air to minimixe energy loss
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Unread postAuthor: Demon » Thu Oct 30, 2008 3:23 pm

The pressure rating of PVC actually increases with a drop in temperature, but exceeding this limit or dropping it causes it to fail spectacularly. If you stay under 80% of the pressure rating and wrap in insulation, you wouldn't really need to worry about heating it at all!


The 2 inch chamber is rated to 280 PSI and i use it maximum to 80 PSI.

Will just putting insulation around it will solve the problem?

And should i insulate the barrel too?
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Unread postAuthor: psycix » Fri Oct 31, 2008 5:27 am

nivekatoz wrote:The aluminum pipe is sch 80 and has a tencel streangth of like 10,000 psi or something like that. Im not sure you would have to check out the spects. I have mentioned the site before and was blamed for working for the place. I DO NOT. Any ways.... :roll:

Tensile strength is the strength of the material itself, not the pressure rating of the pipe.
I think you just proved that you do not work there. :D
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Unread postAuthor: cowkiller » Fri Oct 31, 2008 5:18 pm

grumpy wrote:you could always wrap it with one of those 12 volt electric blankets that long distance truck drivers use.


in this line of thought if you buy some of those heat patches for your back or leg or those hand warmers hunters use or even battery operated self heating socks
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Unread postAuthor: Biopyro » Sun Nov 02, 2008 6:54 am

john bunsenburner wrote:Get an old vacume cleaner and an electric heating coil then switch the motor round so it blows and not sucks and blocw hot air through the system

Sooo, kinda like a hairdyer? :P

The 2 inch chamber is rated to 280 PSI and i use it maximum to 80 PSI.

Will just putting insulation around it will solve the problem?

And should i insulate the barrel too?


Your pressure really shouldnt cause you a problem in cold weather but if you have some insulation handy then it can't hurt just to add that little extra saftey net, so yes insulation will solve the problem
The barrel won't be holding pressure for more than a fraction of a second, but it would be worth it just to be on the safe side.
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Unread postAuthor: psycix » Sun Nov 02, 2008 10:53 am

The barrel won't be holding pressure for more than a fraction of a second, but it would be worth it just to be on the safe side.

People have had their BARREL fail because they were firing a frozen projectile.
This shows that the barrel can indeed fail easily due to the pressure shockwave.
Due to the low temperatures, one could say that the pressure rating goes up, but that the shockwave resistance goes down (getting brittle).
Dropping a frozen pressurized gun is Russian roulette. But the barrel, is also subjected to a shockwave of pressure when it fires. The chamber does not really experience any shockwave.

So both chamber and barrel have reasons why not to get frozen:
-Chamber: dropping it or something may break it
-Barrel: firing gun may break it
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Unread postAuthor: nivekatoz » Wed Nov 05, 2008 7:37 pm

psycix wrote:
nivekatoz wrote:The aluminum pipe is sch 80 and has a tencel streangth of like 10,000 psi or something like that. Im not sure you would have to check out the spects. I have mentioned the site before and was blamed for working for the place. I DO NOT. Any ways.... :roll:

Tensile strength is the strength of the material itself, not the pressure rating of the pipe.
I think you just proved that you do not work there. :D

I not saying Im a expert on psi ratings.. All I know is that stuff is strong. Scuba tanks are aluminum, and I read somewhere that an aluminum soda can can hold at least 100 psi. I think that a sch 80 T-6 aluminum alloy pipe can hold up to 100-200 psi at least .. I know this for sure ..Like I said, Im not an expert, so I dont want to argue. Im not saying Im right, because ,I may not be. :dontknow:
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Unread postAuthor: TurboSuper » Wed Nov 05, 2008 8:10 pm

Naw man, go for the water heating system!

I liked the idea of using a similar system to a computer(or car) radiator. Have the water pumped to an external radiator with a heating coil or Peltier plate attached.
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Unread postAuthor: SpudBlaster15 » Wed Nov 05, 2008 9:00 pm

nivekatoz wrote:I think that a sch 80 T-6 aluminum alloy pipe can hold up to 100-200 psi at least ..


T6 is a designation given to aluminum that has been artificially age hardened, it has nothing to do with the alloy composition (Well, it does, as only certain alloys can reach a grade of T6).

The aluminum pipe is sch 80 and has a tencel streangth of like 10,000 psi or something like that.


Wow, that is some low strength aluminum. :roll: The most common moderate strength alloy is 6061-T6, which has a tensile strength of about 45,000psi.
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Unread postAuthor: nivekatoz » Thu Nov 06, 2008 6:44 pm

SpudBlaster15 wrote:
nivekatoz wrote:I think that a sch 80 T-6 aluminum alloy pipe can hold up to 100-200 psi at least ..


T6 is a designation given to aluminum that has been artificially age hardened, it has nothing to do with the alloy composition (Well, it does, as only certain alloys can reach a grade of T6).

The aluminum pipe is sch 80 and has a tencel streangth of like 10,000 psi or something like that.


Wow, that is some low strength aluminum. :roll: The most common moderate strength alloy is 6061-T6, which has a tensile strength of about 45,000psi.


Like I said Im no expert. I may have quoted the wrong numbers.. The right info is on the web site. Check it out. Its ONLINEMETALS.COM. Look up sch 80 2"aluminum pipe. The stuff might not be pressure rated but I think it can hold alot of pressure. Say what you will but you will not change my mind.
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Unread postAuthor: SpudBlaster15 » Thu Nov 06, 2008 11:46 pm

nivekatoz wrote:Like I said Im no expert.


Pretty sure we all figured that out. :roll:

And as far as I know, Onlinemetals does not sell "aluminum pipe". They sell pipe made from aluminum ALLOYS that are much stronger than what you suggested, which is what I tried to explain to you in my previous post, but it obviously went right over your head.
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Unread postAuthor: nivekatoz » Fri Nov 07, 2008 2:19 pm

What ever. You can try to act smart and degrade me. I dont care. Like I said, I did not not know the exact numbers. I never clamed to know the facts. I just said what I thought I knew. Of course Online metals numbers were higher. Like I said, that stuff is strong. I don't know what your problem is with me. All I was doing was trying to help someone out with simple advice.
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Unread postAuthor: SpudBlaster15 » Fri Nov 07, 2008 6:37 pm

nivekatoz wrote:All I was doing was trying to help someone out with simple advice.


That's my problem. When ignorant people give advice to people equally as clueless as them, nothing is accomplished other than the transmission of misinformation. We all know that it is like a plague on this forum, so please, if you have no idea what you are talking about, keep your advice to yourself.
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Unread postAuthor: SpudBlaster15 » Sat Nov 08, 2008 12:38 pm

If you actually had any idea as to what you are talking about, you wouldn't think I was a jerk. I only come across that way to the people who are stupid enough to post garbage misinformation that I have to correct. Notice that you are the only forum member who feels this way.
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