My buddy made a rack using 1 1/2 Rigid Conduit 1.48 inside D. He is planning to use them for his multi-break shells like the really really small ones. I told him I didnt think that was a smart idea to do. Told him to use HDPE tubing, but anyone have any suggestions ?
Randall
June 14th, 2007, 01:27 PM
Stand way the hell back, I guess. pretty much HDPE, Fibergalss, and Cardboard are the only approved materials for motars. To my knowledge there are no exceptions.
skibladerj
June 14th, 2007, 01:35 PM
make sure he paid his health insurance dues:rolleyes:
St1dinoh
June 14th, 2007, 01:48 PM
My buddy made a rack using 1 1/2 Rigid Conduit 1.48 inside D. He is planning to use them for his multi-break shells like the really really small ones. I told him I didnt think that was a smart idea to do. Told him to use HDPE tubing, but anyone have any suggestions ?
tell your buddy PVC/plastic doesn't feel to good shattered and sticking into your face.
that might change his mind on using that thing.
trust me bro i learned the hard way when i first joined this forum, you got a lot more of the same type comments coming your way.
Dragon
June 14th, 2007, 03:59 PM
tell your buddy PVC/plastic doesn't feel to good shattered and sticking into your face.
that might change his mind on using that thing.
trust me bro i learned the hard way when i first joined this forum, you got a lot more of the same type comments coming your way.
Or metal, yeah, metal stings a bit too. And then there is the extra hassle of always setting off the airport metal detectors because he can't get the shrapnel out of his eyes.... Bad scene.:puke:
Switchfoot55
June 14th, 2007, 04:03 PM
Yeah, pretty much you should continue to tell your buddy no go on the pvc, or abs, or schedule 40/80, etc...
ONLY HDPE, fiberglass, or cardboard.
Of course its not always possible to persuade our friends to be safe. So, in that case, like mentioned above, just be no where near that thing if he uses it (and make sure no one else is near that thing either!).
St1dinoh
June 14th, 2007, 04:17 PM
Yeah, pretty much you should continue to tell your buddy no go on the pvc, or abs, or schedule 40/80, etc...
ONLY HDPE, fiberglass, or cardboard.
Of course its not always possible to persuade our friends to be safe. So, in that case, like mentioned above, just be no where near that thing if he uses it (and make sure no one else is near that thing either!).
^good advise there
i went to a show once (prodigital can back me up on this) where the guys were just begging to get injured or killed, basicly breaking every single saftey rule we live by on these forums, and sometimes people just won't listen.
the guy was loading salutes into PVC!!!
luckily i had my 24 shot fiberglass rack in my trunk (you might be a pyro if) and i stronly encouraged them to swap thier PVC death trap out with my fiberglass rack.
i could make a 2 page list of all the things we weren't able to prevent them from doing (scary stuff) but i was pleased i was at least able to convince them to ditch one of the PVC racks.
when the show was over we walked through the shoot zone inspecting the carnage, luckily my rack survived, but almost every cardboard tube they kept reloading did not. most of the 20 "shooters" were covered head to toe in burns and a few of them were bleeding. from getting hit by low breaks.
i saw 2 ready boxes go off amidst a mass of people, they just huddled down like a turtle and somehow lived through it. BTW when i say ready boxes i mean cardboard boxes full of shells with no cover...not a ready box at all really just an accident waiting to happen...which did.
idiots.
everyone of them was lucky to not loose something god gave them that night.
sometimes no matter how much you tell someone not to do something they will still do it.
:oops:
a few vet's here just rolled thier eyes because i was that guy about 3 years ago when i joined up. search the old forums for "new years eve disaster" and you'll see what i mean.
against all the advice here i thought i could get away with PVC...boy was i wrong. almost burnt down my friends house when low breaks started beating the hell out of everyone standing on the deck watching the show.
sometimes you gotta touch the hot stove to not do it again, some people are smart enough to learn from others mistakes instead.
chaz...you should ask your friend which one he is.
mastersparks
June 14th, 2007, 07:46 PM
A-holes like you described are one of the main reasons we are all in danger of having our hobby taken away from us.
If we see people using fireworks dangerously, it is our duty to stop them. Good job Dinoh.
Ask him which piece of the PVC he would liked embedded in his body or the body of an assistant or spectator. Ask him how he plans to handle the lawsuits if it goes into the a spectator or assistant. Remind him that PVC can't be seen by xray or any other non-intrusive form of detection. In other words, they have to use surgery to dig around and find it. PVC is an accident waiting to happen.
cjurczak
June 14th, 2007, 09:15 PM
Or metal, yeah, metal stings a bit too. And then there is the extra hassle of always setting off the airport metal detectors because he can't get the shrapnel out of his eyes.... Bad scene.:puke:
Good luck getting 1.4g shells to shatter a steel mortar...I shoot some larger caliber shells from steel, usually large 6"+ multibreak shells...Yes a piece of steel would hurt, but I think you'd be hard pressed to find a shell that will burst a steel mortar short of a salute...
MondoMage
June 14th, 2007, 10:01 PM
Good luck getting 1.4g shells to shatter a steel mortar...
I haven't heard anything to the contrary so far, but when I read the original post I got the impression that he was talking about rigid metallic conduit, rather than PVC. Could be wrong, I'm sure.
Anyways, how thick are the walls on standard steel mortars compared to rigid metallic conduit?
Randall
June 15th, 2007, 05:47 AM
I thought maybe he was talking about the grey plastic stuff thats popular now for electrical apps.
Found this before on the net.
http://www.pyrouniverse.com/gallery2/data/500/medium/metalmortar.jpg
Dragon
June 15th, 2007, 05:51 AM
Good luck getting 1.4g shells to shatter a steel mortar...I shoot some larger caliber shells from steel, usually large 6"+ multibreak shells...Yes a piece of steel would hurt, but I think you'd be hard pressed to find a shell that will burst a steel mortar short of a salute...
Granted, but if the guy is using metal (rigid conduit), he may load them upside down. Also the rigid conduit is rather thin. IMHO, your mileage may vary, professional driver on a closed course, etc, etc.
I just searched for it. The wall is .154 inch, which is thicker then I would have guessed. So the odds of failure are really small, but if it fails, I don't want to be there.
So we have a small chance of it failing
If it fails we have a small chance of there being pieces
I believe in small chances, I play the lottery :D (only about a 5 bucks a month)
However with HDPE if (when) it fails we are fairly sure it will be safe.
cjurczak
June 15th, 2007, 06:28 AM
When I read ridged conduit, I thought plasic too...I am not sure of the specs on the metal conduit, but I would probably avoid that for use in mortars...If anyone knows proper specs on the use of steel mortars please let us know...Steel is definatly not my first choice...I've only used steel maybe 5 times...and its a pain in the back every time...
GK
June 15th, 2007, 04:36 PM
If we are discussing METAL rigid conduit. This is spec'd basically the same as steel gas line (Schedule 40)
If you refer to NFPA 1123 A.4.3.7 you will find that this IS an acceptable material for mortars. 1123 only refers to sizes down to 2 inches. The wall thickness for 2 inch cylindrical multibreak shells is 0.15 inches minimum.
I agree with cjurczak in that it would be pretty unlikely that a consumer item could burst a steel mortar since flash isn't used in consumer items.
Steel used to be the ONLY mortar material out there. And it is still the only material that is approved for large 'salami' multibreak shells due to its superior tensile strength.
GK
LStathas
June 15th, 2007, 09:09 PM
Mild steel is very "gummy" in nature. I would think even if a 1.4g shell was able to rupture a steel mortar it would only tear and not fracture. The weight issue is probably the biggest draw back on using quantities of steel mortars.