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Solvent weld cure times

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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Solvent weld cure times

Unread postAuthor: Pilgrimman » Tue Jul 24, 2007 1:02 pm

I've been researching the recommended cure times for my solvent welds, as I can't wait to shoot my new gun, but I want to be safe. I found this.

http://ipscorp.com/weldon/pdfs/IPS_cartoon_06.pdf

It claims that over 60 degrees Fahrenheit, that you only have to wait 12 hours for 2" pipe, and less for smaller pipes! Of course, the temperature here is well over 60 degrees, as it's summer in the U.S. If you have thoughts or corrections, please post them, as I want to shoot pronto, but I have to wait until 3:00 PST if the 24-hour rule is still true.
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Unread postAuthor: robert23 » Tue Jul 24, 2007 1:21 pm

I have used guns at lower pressures just hours after gluing them. It would also depend on whether or not you are using a combustion gun. I have actually had the glue burn in a gun that I did not let cure completely. It didn't explode or anything, it just leaked for a while after that.
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Unread postAuthor: Pilgrimman » Tue Jul 24, 2007 1:28 pm

It's a pneumatic piston gun, so I want pressure safety, and I want the PVC to withstand the piston, even though I made a bumper for it.
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Unread postAuthor: robert23 » Tue Jul 24, 2007 2:08 pm

Oh. Well I guess it would be your call, I've never made a piston gun. I have done some plumbing, and we never had to wait 24 hours to run pressurized water through the pipes, more like one hour. Of course, the pressure was not much over 50psi. It's good that you thought about the impact from the piston though, I might not have.
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Unread postAuthor: frankrede » Tue Jul 24, 2007 2:13 pm

Come one, look at the glue bottle, and how long does it say to let cure?
24 hours maybe?
Just have some damn patience and save your self the trouble of having to rebuild your cannon.
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Unread postAuthor: Pilgrimman » Tue Jul 24, 2007 2:17 pm

It doesn't say, that's why I asked. :D
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Unread postAuthor: A-98 » Tue Jul 24, 2007 2:17 pm

well, i'd say give it 24 hours for a combustion, cause the solvent is very flammable, and you don't want un-needed fires inside your cannon. also, for pneumatics i'd give it 12 hours minimum, and 24 would be best. however, for both, just read the can, theres usually some info. it also depends on the speed the solvent sets at.

i am being an uber hypocrite right now, given that i use very fast glue (you better get it correct the first time you shove it, cause it isn't moving again) and wait only an hour max for it to set before putting max pressure into my gun. i actually need to get some of the slower stuff, cause as is when i'm dealing with elbows and stuff i have a -30% success rate of getting them lined up strait. i got so pissed at a part of my newest cannon, that after doing it once perfectly, then cross threading that, and trying to re-do it another 2 times, none of which worked, i finally smashed the offending pieces with a sledge hammer. interestingly enough, this popped one of the joints, but pulverized the rest of the part.
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Unread postAuthor: frankrede » Tue Jul 24, 2007 2:31 pm

Ha the elbows I get come with aligning tabs!
Yes its worth driving to Ewings to get them even though lowes is right there.
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Unread postAuthor: A-98 » Tue Jul 24, 2007 3:00 pm

lucky.
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Unread postAuthor: Pilgrimman » Wed Jul 25, 2007 12:03 am

when i'm dealing with elbows and stuff i have a -30% success rate of getting them lined up strait.


My rate is somewhere in the "none whatsoever"% success rate with elbows! Similar problems FTW! :lol:
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Unread postAuthor: iPaintball » Wed Jul 25, 2007 12:13 am

I just butt the elbows together, then press the on something flat and let the cement dry/
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Unread postAuthor: Modderxtrordanare » Wed Jul 25, 2007 12:43 am

iPaintball wrote:I just butt the elbows together, then press the on something flat and let the cement dry/


I press them together, then lay them on the ground and stand on them till they line up properly. :lol:
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Unread postAuthor: dongfang » Thu Jul 26, 2007 4:37 pm

Hi,

One brand of PVC cement (Tangit, it's German I think) has this rule of thumb on the label: 24 hours for new piping systems; for repairs: one hour per bar of pressure.

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