Insulation Inside 2" Tubing

Also called Stump's Clone.
Bricklayer2
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Insulation Inside 2" Tubing

Postby Bricklayer2 » October 8th, 2017, 8:13 am

I am thinking about using "perlite" inside the tubing on my GF builds and Ruxul in between walls. Any thoughts about the perlite? According to the website the temp range is there and it is used in many foundry applications. Maybe over thinking things :headwall: .



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Re: Insulation Inside 2" Tubing

Postby Big T » October 8th, 2017, 9:57 am

I think most guys use one type of insulation through out the entire build so that they don't have to buy two different types. I don't see any reason that it wouldn't work.


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Re: Insulation Inside 2" Tubing

Postby Bricklayer2 » October 8th, 2017, 3:27 pm

Being a masonry contractor i just happen to have two bags of perlite and thought it may fill the cavities easier and more complete. I believe it will work, I have poured this stuff into 1 inch openings although it is a little slow you have to let the air escape.



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Re: Insulation Inside 2" Tubing

Postby Rodcrafter » October 11th, 2017, 7:17 am

I believe this topic came up before, and the fact that it expands it was decided it may not be the best choice. i found this on the web; Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.

It may pressurize the tubes I just don't know personally.


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Re: Insulation Inside 2" Tubing

Postby Bricklayer2 » October 11th, 2017, 7:39 am

Probably not worth the chance so I will stick to what we know works. Ordered mineral wool yesterday. Thanks for the information.



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Re: Insulation Inside 2" Tubing

Postby MattJ » October 11th, 2017, 8:58 pm

does insulating inside the tubes actually help prevent heat transfer to the exterior skin?



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Re: Insulation Inside 2" Tubing

Postby Squiggle » October 12th, 2017, 8:37 pm

Sure does, I blew through a couple of my tubes with some crap rookie welding (using a stick unit before I got my mig) & you can definitely feel where I did that when it's cooking. :kewl:


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Re: Insulation Inside 2" Tubing

Postby The Czar » October 16th, 2017, 9:51 pm

Rodcrafter wrote:I believe this topic came up before, and the fact that it expands it was decided it may not be the best choice. i found this on the web; Perlite is an amorphous volcanic glass that has a relatively high water content, typically formed by the hydration of obsidian. It occurs naturally and has the unusual property of greatly expanding when heated sufficiently.

It may pressurize the tubes I just don't know personally.



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Re: Insulation Inside 2" Tubing

Postby Rodcrafter » October 17th, 2017, 5:37 am

there we go


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