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Golf Ball pipe in DWV

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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Golf Ball pipe in DWV

Unread postAuthor: brumby » Mon Oct 16, 2006 11:46 pm

does SDR21 Pipe fit into DWV pipe.

In Australia its all I can get
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Unread postAuthor: killagorrila99 » Tue Oct 17, 2006 12:18 am

You dont need to sleeve golf ball pipe, It should be fine. I used a 4 and a half foot long peice and it held up fine!
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Unread postAuthor: POS » Tue Oct 17, 2006 6:06 am

yeah, but at what pressure ?
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Unread postAuthor: Atlantis » Tue Oct 17, 2006 1:43 pm

SDR is'nt maid for pressure, the only reason its sleeved is for support, a long barrel would snap under its own weight.
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Unread postAuthor: brumby » Wed Oct 18, 2006 1:12 am

so does anyone here use DWV, is it the same size as 2" or 1.5"
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Unread postAuthor: killagorrila99 » Wed Oct 18, 2006 1:57 am

Atlantis wrote:SDR is'nt maid for pressure, the only reason its sleeved is for support, a long barrel would snap under its own weight.


Hmmm thats funny, SDR21 is rated to 200psi. And I have a gun with a 4 and a half foot unsleeved sdr21 gb barrel, and I shoot that gun whenever I get bored, Theres nothing else to do so I shoot it ALOT!
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Unread postAuthor: CS » Wed Oct 18, 2006 9:47 pm

Bah!

Internal pressure is not a concern in most cases. Hell, as far as ratings go, 4" sch 40 [Common chamber size] has a lower rating then that of 1.5" SDR-21. Rather external loads that the 1.5" SDR-21 experiences is the reason in which the pipe is so commonly sleeved. Such 'external loads' might include dropping, or leaning the gun up against a wall too hard. I recently chipped a end off a barrel on one of my early combustions, in which the barrel was not sleeved.

Atlantis, SDR-21 is both made for pressure, and will not fail under its own load. [Standout load to be specific] Working in construction the bit I have, Ive learned quickly that most plumbers dislike the use of sch 80 plastic piping. While if used in a environment in which it is uneffected by external loads it will withstand a great bit more of pressure, although since external loads are hard to avoid in exposed above-ground environments, sch 40 is preferred. Sch 80 piping while being stronger, is less resistant to being 'bent'. In which case it will 'snap' easier then that of sch 40. Sorry to venture...

While as far as I understand and have experienced, DWV has a similar ID to that of sch 40 piping. In which the 1.5" SDR-21 will sleeve inside of the 2" pipe, although with a very loose fit at ~.147" of difference. [Slightly greater then that of 1/8"] Presented with this circumstance you could possibly sleeve the 1.5" SDR-21 in something to bring it closer to ~<2.047", or leave it unsleeved.
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Re: Golf Ball pipe in DWV

Unread postAuthor: killagorrila99 » Thu Nov 16, 2006 3:52 am

brumby wrote:does SDR21 Pipe fit into DWV pipe.

In Australia its all I can get


Lol I found out it's almost impossible to get sdr21 in australia. And I only just found out mine is just a pn12 40mm pvc pipe. Fits golfballs well. Check if yours sais " PN " and then a number (ie. 7,9,12,16,18,20) 'caus that means It doesent need to be sleeved.
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Unread postAuthor: MrCrowley » Thu Nov 16, 2006 3:55 am

yeah thats what i used on my golfball gun, 40mm PN12.
if it has PN its pressure rated to that pressure e.g PN12=12bar(170psi)
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Unread postAuthor: rna_duelers » Thu Nov 16, 2006 4:39 am

Yeh same goes here 40mm Pressure Number class 12 pvc piping works great for golfballs its a near perfect fit.Hence the golfball gun i made.

And no DWV and PN 12 pipe does not fit in any pipi i no of,without alot of space on either side.
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