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Spray foam insulation ...

 
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mbima(at)hydro.mb.ca
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PostPosted: Thu Apr 19, 2007 8:15 am    Post subject: Spray foam insulation ... Reply with quote
Although it is impervious to gasoline (I looked it up in chemistry
tables and performed experiments in the shop over 6 and 12 months), the
expanding foam does run away a bit when it expands. You can buy the
minimal expanding stuff, but it still expands.

I have abandoned the idea in favour of close-cell foam pipe insulation
(for 3/4" copper tubing - about 2" OD). This has a little bit of give
when installed, but most importantly, can be easily removed in case of a
tank leak. The spray foam sticks and would have to be chopped out.

Martin Bima
701 STOLVAIR

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n787xl(at)aol.com
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PostPosted: Thu Apr 19, 2007 5:18 pm    Post subject: Spray foam insulation ... Reply with quote
I would advise not to use foam. The expansion continues when the foam is nearly solid. I am quite sure it would partially colapse the tank and bulge the wing skin.

I have used it in other applications and was suprised to see expansion hours later.

James Schultz
601xl 65% 3300jab
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