Gas pipe through wall, sleeve ro seal?

[cadunkle]

I currently have a furnace in my garage on the floor, it's higher output than is required and takes up a lot of floor space. I'm installing a ceiling mounted unit heater so need to change some plumbing. Currently the furnace is against an exterior wall of the detached garage, gas line comes in low through the block wall.

I want to mount he unit heater on the ceiling above where the furnace currently is, and run the gas line vertically outside, then come through the wall up high. It will pass through a 2x4 wall insulated with fiberglass batts and finished with T1-11 outside and OSB inside. How do I seal this wall penetration? Is there some sort of flanged sleeve I can install from the outside with caulk to seal it and caulk or foam between sleeve and black pipe? What is typically done to seal black pipe through a regular framed wall? This penetration will be about 11" below the soffit overhang, so a relatively dry location.

 

[rooster4321]

Caulk on the outside would be good enough just want to keep the rain and critters out

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[Git]

A flange would work. At least it would clean it up. Split or solid, something like this

 

[D.J.]

Git that isn't a sleeve !

 

[mm08822]

Git that isn't a sleeve !

Arent sleeves required to go thru masonry/concrete only?

 

[The Cobbler]

Arent sleeves required to go thru masonry/concrete only?

here as far as I know, any wall penetration, the pipe is wrapped with black vinyl tape

 

[HoosierBuddy]

It's been awhile since I've read the national fuel code, but my recollection is through wall piping needs to be coated in some manner to prevent corrosion. I've seen it done with tape. I've seen it done by painting the pipe before installing it.

I've seen times where it wasn't done at all.

If I were you I'd build the pipe assembly you are going to put outside and include the leg that will go through your wall, then wipe the whole thing down with laquer thinner to clean it, then prime it, then paint it. Then install it against the wall and anchor it properly. Final step would be to spray foam and caulk around the pipe to prevent water or air infiltration.

Inside gas pipe really shouldn't need painted, but if you don't paint the outside section, it's going to rust. The concern with the through wall section is you don't want it to ever corrode to the point of leaking gas into the wall cavity as that could be catastrophic.

Good luck!

Phil

 

[skippydoo]

https://www.mcmaster.com/catalog/125/3969
This is what I used on my Pole barn.