Looking for a substance that can be use as a heat barrier
Looking for a substance that can be use as a heat barrier
(OP)
Hi
I am looking to in case a copper pipe within another pipe of larger dia. I'm looking for a material or substance that is cheap and easy to attain that will reduce heat transfer to the point that it will not catch grass or leaves a fire that the pipe may be placed on. The inside pipe will contain sugar and KNO3, burning at temp along lines of most smokeless gun powders with the same flash producing a smoke.
I am looking to in case a copper pipe within another pipe of larger dia. I'm looking for a material or substance that is cheap and easy to attain that will reduce heat transfer to the point that it will not catch grass or leaves a fire that the pipe may be placed on. The inside pipe will contain sugar and KNO3, burning at temp along lines of most smokeless gun powders with the same flash producing a smoke.





RE: Looking for a substance that can be use as a heat barrier
[ It is not possible to caramelize five lbs. of sugar/KNO3 mix in an electric frying pan without setting it off. The fellow who talked me into trying it had never gotten above two lbs. himself, but he forgot to mention that detail. ]
Unconstrained by a pipe, the reaction proceeds to completion in much less time than it takes to write about it, produces a beautiful huge purple flame, and fills a large building with dense white smoke in a heartbeat. Okay, two heartbeats.
Constrained in a pipe, well, you won't see the flash unless the pipe ruptures, and the evolving gas has to produce a pretty good pressure, so there is some risk of that happening.
So, you want to fill a pipe with this mix, start the reaction, toss your device in leaves/ grass, and NOT start a fire? What, pray tell, ARE you trying to do?
Mike Halloran
NOT speaking for
DeAngelo Marine Exhaust Inc.
Ft. Lauderdale, FL, USA
RE: Looking for a substance that can be use as a heat barrier
My idea is to have a core pipe of 1" dia with one end sealed and this is where the material that creates the smoke is. The other end will be open and this is where the fuse goes and where the smoke can escape. On the outside of this tube, I'd like to have something around the outside to reduce the heat transfer to the outside pipe of 1 1/2" dia. I was thinking of clay????
***Anyone know how clay would work or any other item that would work?
RE: Looking for a substance that can be use as a heat barrier
RE: Looking for a substance that can be use as a heat barrier
RE: Looking for a substance that can be use as a heat barrier
Don't do it.
If you feel the need for pyrotechnic smoke, visit your local fireworks stand. They wrap fireworks in cardboard tubes for a reason.
RE: Looking for a substance that can be use as a heat barrier
I think they still sell smoke bombs. Look around for the best price.
Try your local marine supplier. We have several on our boat.
Also try the local utilities company and see if they use smoke bombs.
We used smoke bombs in tracing and mapping drain lines.