Login    Register
User Information
We are a free and open
community, all are welcome.
Click here to Register
Who is online

In total there are 58 users online :: 4 registered, 0 hidden and 54 guests

Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Exabot [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot] based on users active over the past 5 minutes

The Team
Global Moderators
global_moderators.png CS

Storing my cannons/projects in the attic

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.
  • Author

Unread postAuthor: frankrede » Sun Sep 14, 2008 3:39 pm

Once cooled unless the pipe warps while up there it should be fine.
  • 0

Current project: Afghanistan deployment
User avatar
Lieutenant General
Lieutenant General
Posts: 3220
Joined: Thu Jul 20, 2006 9:47 pm
Reputation: 0

Unread postAuthor: Velocity » Sun Sep 14, 2008 6:12 pm

Hotwired wrote:
Velocity wrote:However, when the heat goes up to 100 degrees Fahrenheit, the pressure rating of this pipe would be 173.6 degrees Fahrenheit. If the heat got up to 140 degrees Fahrenheit (as starman said it might), the pressure rating would be a mere 61.6 degrees Fahrenheit.

I have this feeling that someones brain and message were not synchronised before posting :P

Yeah, I only got like 5 degrees Fahrenheit of sleep last night, give me a break 8) .
  • 0

User avatar
Brigadier General
Brigadier General
Posts: 1039
Joined: Tue Feb 07, 2006 5:42 pm
Reputation: 0

Unread postAuthor: McThunderThighs » Sun Sep 14, 2008 11:32 pm

Although this is very much after the fact...

I wouldn't worry so much about warping your PVC so much as coming back to a gun that is no longer glued together.

Active chemical cements, like what PVC cement is made from, rapidly decompose in heat. Don't let your guns get above 100deg.F too much unless your are using a better cement made for the heat (you have to order it and it takes 2 days to cure so I know you didn't use it).

Hope that doesn't make you worry too much!
  • 0

Posts: 19
Joined: Sat Sep 13, 2008 11:10 pm
Reputation: 0

Unread postAuthor: Hotwired » Mon Sep 15, 2008 6:58 am

I don't believe that would be the case MTT.

Cement is the wrong word really it ought to just be called PVC solvent.

After the solvent softens the plastic, the parts are brought together and the polymer chains entangle before the plastic rehardens.

The solvent itself works its way out by passing through the plastic so after a while it isn't even present and the only thing left in the join is just the entangled polymer chains of the two original bits of PVC.
  • 0

User avatar
Lieutenant General
Lieutenant General
Posts: 2599
Joined: Fri Oct 13, 2006 5:51 am
Location: UK
Reputation: 0


Return to Pneumatic Cannon Discussion

Who is online

Registered users: Exabot [Bot], Google [Bot], Google Adsense [Bot], Yahoo [Bot]

Reputation System ©'