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Home Brew Forums > Home Brewing Beer > Equipment/Sanitation > insulating the HLT?
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Old 06-13-2008, 02:01 PM   #11
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Maybe something like THIS would work. The 2nd one down...

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some people will tap anything that has a hole.
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Old 06-13-2008, 02:20 PM   #12
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I use the 3 layers of the foil/bubble wrap taped together with aluminum tape for my keggle. I also put a blanket on the lid. I lose 1-2dF per hour.

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Old 06-13-2008, 02:33 PM   #13
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I use the 3 layers of the foil/bubble wrap taped together with aluminum tape for my keggle. I also put a blanket on the lid. I lose 1-2dF per hour.
You don't have any problems with it melting ?
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Old 06-13-2008, 05:12 PM   #14
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You don't have any problems with it melting ?
No, but the keg skirt helps. Also, kegs have those 4 little drainage holes in the skirt, through which flames can shoot up through. So, I put aluminum tape over those holes as well. I just make sure to be careful to allow good air flow to the bottom and light right away as I turn on the gas so propane doesn't build up under the skirt and cause an explosion.

Your mash tun probably has no skirt, so in your case, if I were to try the foil bubble wrap, I would run aluminum tape a couple inches up from the bottom around the circumference of the pot, connecting the pot and the bubble wrap with the aluminum tape. Depending on how far your flames shoot up the sides, this may work. Otherwise, you'll have to use some sort of fire-retardent/proof insulation material as others suggested. But keep in mind, too, that on your mash tun, you don't need the flames going full blast like for the boil.
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Old 06-13-2008, 05:57 PM   #15
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Is that expanding foam fire resistant? And would it keep it insulated well enough. You could always just buy some flashing and set up some kind of mold with it. Then spay that stuff in between the flashing and the HLT. Maybe use some grease or oil to keep the foam from sticking to the flashing. Let it dry and remove. I think that may work, but I am just throwing an idea out there.

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Old 06-13-2008, 06:19 PM   #16
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No, but the keg skirt helps. Also, kegs have those 4 little drainage holes in the skirt, through which flames can shoot up through. So, I put aluminum tape over those holes as well. I just make sure to be careful to allow good air flow to the bottom and light right away as I turn on the gas so propane doesn't build up under the skirt and cause an explosion.

Your mash tun probably has no skirt, so in your case, if I were to try the foil bubble wrap, I would run aluminum tape a couple inches up from the bottom around the circumference of the pot, connecting the pot and the bubble wrap with the aluminum tape. Depending on how far your flames shoot up the sides, this may work. Otherwise, you'll have to use some sort of fire-retardent/proof insulation material as others suggested. But keep in mind, too, that on your mash tun, you don't need the flames going full blast like for the boil.
My MLT is fine it's an 80qt cooler. It's the HLT that I need to insulate. I think I will try and find some of that bubble wrap and tape. Then just wrap it up above the b-valve. That should keep it high enough not to be in direct fire. If it melts I'll know soon and can pull it off and try something else.
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Old 06-13-2008, 06:53 PM   #17
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My MLT is fine it's an 80qt cooler. It's the HLT that I need to insulate.
My bad!
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Old 06-14-2008, 12:59 AM   #18
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Is that expanding foam fire resistant? And would it keep it insulated well enough.
The expanding foam that I used on a friends tank was filled with foam (extra cans off the job site) used on electrical and fire protection pipe penetrations thru the electrical room closets on a 37 story highrise. Yes I believe said foam item is approved by the fire marshal. I have used standard expanding foam in a box and cans used for hot tubs. Again no worries as this is for all electric heating systems. I have a natural gas line in the patio to hook onto besides propane but will not pay those crazy propane prices not alone wanting NG flames under my kegs. I'm talking all electiric heating where you can insulate the kegs fully including top and bottom without flame worries. JMO's.
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Old 06-14-2008, 01:09 AM   #19
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I picked up some of the bubble foil stuff and the aluminum tape. I'll give that a shot and see how it does next week.

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Old 06-14-2008, 01:14 AM   #20
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Quote:
Originally Posted by Choguy03 View Post
Is that expanding foam fire resistant? And would it keep it insulated well enough.
The expanding foam that I used on a friends tank was filled with foam (extra cans off the job site) used on electrical and fire protection pipe penetrations thru the electrical room closets on a 37 story highrise. Yes I belive said foam item is approved by the fire marshal. I don't recall the "R" rating of this foam. I have used standard expanding foam in a box and cans as used on hot tubs. Again no worries as this is for all electric heating systems. I have natural gas in the patio besides propane but will not pay those crazy propane prices not alone wanting NG flames under my kegs. All electiric heating only, I can insulate the kegs fully without flame worries. JMO's.
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