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Well I'm building a combustion..pipe questionable

Post questions and info about combustion (flammable vapor) powered cannons here. This includes discussion about fuels, ratios, ignition systems, safety, and anything else relevant.
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Well I'm building a combustion..pipe questionable

Unread postAuthor: JDP12 » Fri Apr 27, 2007 7:38 pm

Hey all,

Well I have some pipe laying around..So I am going to build a combustion cannon!!!!!! :D :D

I just want to check this will be okay..I believe it should be..

this is what the 4" pipe says

CELLULAR CORE PVC DWV PS SCH40 SERIES N8F-dwv ASTM F 891-98

Thanks...

ilovetoblowthingsup
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Unread postAuthor: Specialist » Fri Apr 27, 2007 7:41 pm

well... ive heard you arent supposed to use cellular core because it often blows up but since its got sch40 on it it seems like you could use it. i dont think i would take that risk though. good luck!
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Unread postAuthor: JDP12 » Fri Apr 27, 2007 7:45 pm

So you think I should get some different pipe?

I think I will....Just to be safe
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Unread postAuthor: Velocity » Fri Apr 27, 2007 7:47 pm

SCH 40 does not mean anything; it is only an indication of wall thickness.

I could have SCH 40 peanut butter pipe... and yet it wouldn't be safe for any type of spudgun

Cellular Core= bad for all spudgun uses (in my book; some may disagree). Go the safe way and find some better pipe.
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Unread postAuthor: JDP12 » Fri Apr 27, 2007 7:49 pm

K I will definitely do that
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Unread postAuthor: Specialist » Fri Apr 27, 2007 7:51 pm

well sch40 usually means its pressure rated and i have never seen that on cellular core pvc pipe. so i was confused. i wasnt trying to give him bad advice i just gave him my opinion and what i knew.
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Unread postAuthor: sjog » Fri Apr 27, 2007 7:52 pm

forget about it - cell core
PVC is CHEAP
Every one will hard time the crap outta ya, ya dont want the grief.
ya start building ya add this and that pretty soon ya have a nice gun BUT it's made from cell core
Do it right the first time!!!
I dont profess to know what the numbers mean, some one might tell me I'm wrong. Cell core is lite, regular PVC will feel noticable heavier.
I was so excited when I found this site I built a gun in a day.
Did not research. My pipe was found on a job site. It was cell core , I later found out. I shot it a bunch of times but was afraid to build advances on it.
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Last edited by sjog on Fri Apr 27, 2007 8:11 pm, edited 1 time in total.

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Unread postAuthor: JDP12 » Fri Apr 27, 2007 7:54 pm

Soooooooo sjog you're tellin me to get some new pipe then?

EDIT: Does anyone know if homedepot sells the right kind of PVC??

Seems like a stupid question.But my dad hates driving to three stores to find what I need...I tried there website but couldn't find it....
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Unread postAuthor: Specialist » Fri Apr 27, 2007 8:00 pm

yes they sell the right stuff. well atleast for combustions thats where i get all my pvc from. and its not too expensive.
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Unread postAuthor: JDP12 » Fri Apr 27, 2007 8:03 pm

K....So basically any pipe besides ABS and Cellular core will be okay?
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Unread postAuthor: Specialist » Fri Apr 27, 2007 8:09 pm

ya except for sanitary pipes to i found some but was warned not to use it so now im just gana blow it up! ya homedepot carries it all. i think if i remember correctly i have 4 inch pipe from there thats rated at 200 psi. im not sure if i got it from there or not though.
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Unread postAuthor: JDP12 » Fri Apr 27, 2007 8:11 pm

K thanks...Hopefully I got there tomorrow after work (I get done around 12 30) and my dad will take me and I'll be shooting by Sunday afternoon!

HomeDepot has BBQ ingitors right?
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Unread postAuthor: Specialist » Fri Apr 27, 2007 8:12 pm

yes the price ranges from $5 to $15ish and i got a $15 dollar one and it works wonderfully. you will probably find them near the grills. :lol:
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Unread postAuthor: JDP12 » Fri Apr 27, 2007 8:14 pm

Yea I just found a couple Weber ones online thanks...You just saved me the potentially fatal experience of my cannon blowing up!
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Last edited by JDP12 on Fri Apr 27, 2007 8:17 pm, edited 1 time in total.
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Unread postAuthor: sjog » Fri Apr 27, 2007 8:14 pm

they all do. Sorry to drive my point home with a hammer, it's just that I made that mistake my self. :oops:
Are there any building sites in your area?
A 2' piece of 4" PVC is nothing to a plumber. You could ask for scraps or look in the dumpster. Maybe sweep up and clean in trade for some parts
Spud guns have been around for a long time,all plumbers have heard of them. They make 'em too. They get a laugh when ya tell'em what ya building. Dont keep it a secret keep 'em laughing mabe get parts for nothing.
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Last edited by sjog on Fri Apr 27, 2007 8:25 pm, edited 1 time in total.

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