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

In total there are 56 users online :: 5 registered, 0 hidden and 51 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Pressure Rated Pipe

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.
Sponsored 
  • Author
    Message

Pressure Rated Pipe

Unread postAuthor: theepicmool » Tue Nov 18, 2008 4:53 pm

Is it safe to use pipe that isn't pressure rated but that is sch40? If so does PVC/ABS make a difference? I just think it will be difficult to find pressure rated pipe at any store near me.
  • 0


theepicmool
Specialist
Specialist
 
Posts: 46
Joined: Tue Nov 18, 2008 4:25 pm
Reputation: 0

Unread postAuthor: jonnyboy » Tue Nov 18, 2008 5:39 pm

ONLY USE NSF PW PIPE!

abs tears as opposed to explode like pvc does.
  • 0

mobile chernobyl wrote:I can shoot a Canuter Valve off my '82 Chevy Ram F150 AT LEAST 3/4 Mile with 'ma cannon made of soup cans duct taped together, then I just squirt some bacardi 151 in the chamber and hold up my cigarrete lighta and WHOOSH! That thing flies at least 3/4 mile
User avatar
jonnyboy
Colonel
Colonel
 
Posts: 591
Joined: Mon May 26, 2008 1:20 pm
Location: Williamston MI USA
Reputation: 0

Unread postAuthor: theepicmool » Tue Nov 18, 2008 6:01 pm

NSF PW? What if it just has a PSI rating or just has NSF PW stamped on it.
  • 0


theepicmool
Specialist
Specialist
 
Posts: 46
Joined: Tue Nov 18, 2008 4:25 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Nov 18, 2008 6:09 pm

theepicmool wrote:NSF PW? What if it just has a PSI rating or just has NSF PW stamped on it.

That's fine. As long as it has a PSI rating or NSF-PW on it, it should be fine for pressure, read this:
http://www.spudfiles.com/spud_wiki/inde ... _Rated_PVC
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: theepicmool » Tue Nov 18, 2008 6:36 pm

ok, but how much pressure can NSF PW guarantee?
  • 0


theepicmool
Specialist
Specialist
 
Posts: 46
Joined: Tue Nov 18, 2008 4:25 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Nov 18, 2008 6:40 pm

Depends on the diameter and SCH rating.

This should help you:
http://www.pvcplus.com/PVC%20schedule_40_&_80_pipe.htm

Though most people rarely go above 180PSI with PVC, even if the rating is a few hundred PSI. If you're going over 200PSI, i'd recommend metal components.
  • 0

Attachments
PVCSpecSheet.jpg
User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: theepicmool » Tue Nov 18, 2008 7:01 pm

One last thing: Why are PVC cannons more popular then ABS ones when ABS just tear and don't explode? If both are pressure rated is there really any distinction? can i put ABS fittings on PVC pipe and vice versa?
  • 0


theepicmool
Specialist
Specialist
 
Posts: 46
Joined: Tue Nov 18, 2008 4:25 pm
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: MrCrowley » Tue Nov 18, 2008 7:08 pm

Because pressure rated ABS is harder to find and more expensive I think. If pressure rated ABS was just as available as PVC, it'd be a far better material to use.

It's true, ABS will just tear, but since it's easier to find pressure rated PVC then pressure rated ABS, people go with PVC. The ABS that you will see on cannons is most likely DWV (not rated).

Yes you can put ABS fittings on PVC with a special glue. I wouldn't recommend it for pneumatics though.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Unread postAuthor: starman » Tue Nov 18, 2008 7:55 pm

Also, if you use pressure rated PVC pipe and parts, do a thorough and proper construction job and keep pressures down under the ratings, you have an extremely low chance of a PVC explosion.
  • 0

User avatar
starman
Donating Moderator
Donating Moderator
 
Posts: 3041
Joined: Wed Dec 12, 2007 12:45 am
Location: Simpsonville, SC
Reputation: 0

Unread postAuthor: theepicmool » Tue Nov 18, 2008 8:27 pm

What about wrapping in duct tape/drywall tape? I've seen it on some others and it seems that it would keep the shrapnel together in the event of an explosion.
  • 0


theepicmool
Specialist
Specialist
 
Posts: 46
Joined: Tue Nov 18, 2008 4:25 pm
Reputation: 0

Unread postAuthor: MrCrowley » Tue Nov 18, 2008 8:34 pm

theepicmool wrote:What about wrapping in duct tape/drywall tape? I've seen it on some others and it seems that it would keep the shrapnel together in the event of an explosion.

Tape wont do crap. A leg from a pair of jeans probably is the best to contain shrapnel, but it's pointless if you make your cannon correctly with pressure rated fittings.
  • 0

User avatar
MrCrowley
Moderator
Moderator
 
Posts: 10207
Joined: Fri Jun 23, 2006 10:42 pm
Location: Auckland, New Zealand
Country: New Zealand (nz)
Reputation: 4

Return to Pneumatic Cannon Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'