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 63 users online :: 6 registered, 0 hidden and 57 guests


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

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

can you glue pvc to cpvc?

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

can you glue pvc to cpvc?

Unread postAuthor: SilentCyan » Thu Aug 21, 2008 1:51 pm

a friend of mine thought that since the two have slightly different chemical makeups that it wouldn't be safe to glue them together. i'm pretty sure he's wrong but i figured it would be better to check with you guys rather than take any unnecessary risks.
  • 0


SilentCyan
Private First Class
Private First Class
 
Posts: 31
Joined: Mon Jul 21, 2008 1:11 pm
Reputation: 0

Unread postAuthor: SEAKING9006 » Thu Aug 21, 2008 1:59 pm

Yes, you can. End of story.
  • 0

Completed projects:
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon

Current Project: Bolt action rifle (25x140mm + 1in shot)

SEAKING9006
Colonel
Colonel
 
Posts: 734
Joined: Mon Jun 23, 2008 3:20 pm
Location: Texas
Reputation: 0

Unread postAuthor: SilentCyan » Thu Aug 21, 2008 2:29 pm

yay! now i don't have to worry about that anymore.

thanks for the quick response
  • 0


SilentCyan
Private First Class
Private First Class
 
Posts: 31
Joined: Mon Jul 21, 2008 1:11 pm
Reputation: 0

Unread postAuthor: jimmy101 » Thu Aug 21, 2008 3:04 pm

PVC and CPVC are different chemicals. They will absorb and desorb the solvents in the glue at different rates. In addition, PVC glue contains dissolved PVC and it may not properly fuse with CPVC. CPVC glue contains dissolved CPVC and that may not properly fuse with PVC.

Oatey makes an "all purpose" cement for PVC, CPVC and ABS (here) which they say is suitable for pressurized applications. It contains both PVC and CPVC (from the MSDS sheet).

When in doubt read the cans of glue. I would suspect that regular PVC glue is not suitable for a pressurized system made from CPVC pipe. The converse is probably also true, no CPVC glue on a PVC pipe. The "all purpose" glue should work for PVC-PVC, CPVC-CPVC and PCV-CPVC joints.

If you are gluing up a bunch of pieces of PVC (or CPVC) to make a soccer goal then the glue really doesn't matter. If you are going to pressurize the joint to a hundred PSI or more and then hold it in your hand then I would strongly recommend using the proper glue for the pipe.

When in doubt, version 2; What do building codes say? CPVC glue is usually orange. Would a building inspector red-tag a PVC joint with orange glue on it? Or a CPVC joint with a purple stain, or no stain at all? I suspect that an inspector would red-tag both. I suspect that the "all purpose" glue would not meet US building codes for PWS systems. Therefore, it should not be used on a gun.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3127
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: SpudFarm » Thu Aug 21, 2008 3:18 pm

SEAKING9006 wrote:Yes, you can. End of story.


no it isn't

you should never ever glue two different materials tougether with a glue intended for one of them !
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Unread postAuthor: SEAKING9006 » Thu Aug 21, 2008 3:21 pm

.... Damn. I thought that pipe solvent can handle both of them. Well, the solvent I have can, anyway. I just read the can.
  • 0

Completed projects:
CA1 SMSS Basic Inline
CA3 PDAB Airburst Cannon

Current Project: Bolt action rifle (25x140mm + 1in shot)

SEAKING9006
Colonel
Colonel
 
Posts: 734
Joined: Mon Jun 23, 2008 3:20 pm
Location: Texas
Reputation: 0

Unread postAuthor: Sticky_Tape » Thu Aug 21, 2008 3:50 pm

You CAN with epoxy you don't always need to use the glue that is designed for the pvc and cpvc people sometimes people use epoxy for copper too. END OF STORY
  • 0

You can tell how awesome a cannon is by the pressure used.
http://www.spudfiles.com/forums/high-pr ... 12803.html
xnt rnm ne z ahtbg
User avatar
Sticky_Tape
Brigadier General
Brigadier General
 
Posts: 1175
Joined: Thu Jan 31, 2008 6:35 pm
Location: Sydney, Nova Scotia, Canada.
Reputation: 0

Sponsored

Sponsor
 


Unread postAuthor: bigbob12345 » Thu Aug 21, 2008 4:42 pm

Actually its not the end of the story...
Pvc pipe and cpvc pipe have very different o.d's for the givin size. So it would be impossible to glue it together with suffecient strength no matter what glue you use.
End of story...finally
  • 0

User avatar
bigbob12345
Major General
Major General
 
Posts: 1516
Joined: Sat Dec 01, 2007 9:13 am
Location: Mercer Island,Washington
Reputation: 0

Unread postAuthor: clide » Thu Aug 21, 2008 4:58 pm

Or not, CTS CPVC which is most common does have a different OD than SCH40 PVC, but they do make adapters. They also make CPVC in SCH40 and SCH80 although it is much less common.
  • 0

<a href="http://gbcannon.com" target="_blank"><img src="http://gbcannon.com/pics/misc/pixel.png" border="0"></a>latest update - debut of the cardapult

clide
Donating Member
Donating Member
 
Posts: 785
Joined: Sun Mar 06, 2005 3:06 am
Location: Oklahoma, USA
Reputation: 0

Unread postAuthor: potatoflinger » Thu Aug 21, 2008 5:38 pm

But you could solve the problem in the first place by just using the proper glue for each, and a threaded fitting to connect the pvc and cpvc.
  • 0

It's hard to soar with eagles when you're working with turkeys.
User avatar
potatoflinger
Brigadier General
Brigadier General
 
Posts: 1136
Joined: Thu Nov 02, 2006 3:26 pm
Location: Maryland
Reputation: 1

Unread postAuthor: Maniac » Thu Aug 21, 2008 7:52 pm

END story here. They do make special adapters for PVC to CPVC because of this
Pvc pipe and cpvc pipe have very different o.d's for the givin size. So it would be impossible to glue it together with suffecient strength no matter what glue you use.
You could also opt for threaded fittings which is what I would do.

BTW: the special adapters are not hard to get they should be with the cpvc stuff and not the pvc.
  • 0

Coodude26 wrote:
People who laugh really hard at stuff that pisses you off/you getting hurt, who then say "I'm sorry, I can't stop" but you know they easily could.

Mr.C: That's not as easy as you think. It's like me kicking you in the balls and telling you to stop crying.
User avatar
Maniac
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 496
Joined: Tue Oct 23, 2007 5:55 pm
Location: Right behind you
Reputation: 0

Unread postAuthor: SilentCyan » Thu Aug 21, 2008 9:56 pm

yeah i have one of the adapters because thats all they sell at my local lowes(lucky me the one size they sell was what i needed). i do have the all-purpose glue and solvent so i'm going to go ahead and glue this thing together as soon as i can get my piston working.
  • 0


SilentCyan
Private First Class
Private First Class
 
Posts: 31
Joined: Mon Jul 21, 2008 1:11 pm
Reputation: 0

Unread postAuthor: jimmy101 » Fri Aug 22, 2008 11:44 am

SEAKING9006 wrote:.... Damn. I thought that pipe solvent can handle both of them. Well, the solvent I have can, anyway. I just read the can.

The solvent says both CPVC and PVC on it. What does the glue say on it?

There is no "end of story" for this particular question.

Can dissimilar plastics be joined. Yes. The real issue is how you actually do it and will it have the same pressure rating as the code-approved methods.

So, someone saying "yes it can, end of story" is really not being very helpful and may well get somebody hurt.
  • 0

Image

jimmy101
Lieutenant General
Lieutenant General
 
Posts: 3127
Joined: Wed Mar 28, 2007 9:48 am
Location: Greenwood, Indiana
Country: United States (us)
Reputation: 7

Unread postAuthor: SpudFarm » Fri Aug 22, 2008 11:52 am

here is the end of the story:

you use epoxy to glue it tougether then you set in a few locking screws with epoxy on to seal.
  • 0

"Made in France"
- A spud gun insurance.
User avatar
SpudFarm
Donating Member
Donating Member
 
Posts: 2563
Joined: Sat Nov 04, 2006 9:39 am
Location: Norway Trondheim area
Reputation: 0

Return to Construction Materials/Ammo Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], Majestic-12 [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'