Stove Pipe Corrosion

A Coal stoker furnace or stove controls most operations including automatically feeding the coal. They are quite similar to any conventional oil and gas units and easily operated for extended periods of time. They commonly use rice coal but may use larger sizes like buckwheat. They can be used as primary heat, supplementary heat or have a dual set up with your existing oil/gas furnace.
bbnx
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Posts: 43
Joined: Mon. Oct. 18, 2010 6:19 am
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Hyfire II
Location: Northern Michigan

Post Sat. Sep. 22, 2012 6:45 pm

I have used my Hyfire II for two years. It runs hard from November thru April with typically both burners in use. I've burned 14 tons of coal over the last two seasons. The stove pipe has started to rust/corrode internally. I'm just curious to know if this is common and if I so, how much is too much corrosion...? I knew that coal dust was relatively corrosive but didn't expect to see corrosion after the 2nd season. The stainless pipe that runs thru the exterior wall has rust as well but not to the extent of the black pipe.

Should I be replacing the black pipe....? Any input will be appreciated. Thanks in advance.


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Poconoeagle
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Stove/Furnace Make: Buckwalter & Co. , EFM520
Stove/Furnace Model: No. 28 Glenwood 1880, Alaska
Location: Tobyhanna PA

Post Sat. Sep. 22, 2012 6:53 pm

run a brush thru it then vac out and shine a bright lite in it and inspect from outside at dark. if its perforated don't use it. replace it and after shut down this spring clean and wash it out with baking soda/water solution and dry and spray with LPS-3.

mutiple co detectors with new batteries are mandatory to read this 8-)
"Do it Right the First Time" dont leave it for the next guy, as YOU may be the Next guy!!

bbnx
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Posts: 43
Joined: Mon. Oct. 18, 2010 6:19 am
Stove/Furnace Make: Leisure Line
Stove/Furnace Model: Hyfire II
Location: Northern Michigan

Post Sun. Sep. 23, 2012 8:43 am

I will try the "flashlight test" to see if there are any perforations.

At least with the coal stove the ash is not flammable and the pipe is discharging heat and not red hot ash. I also own a wood stove and would be much more concerned if that pipe were corroded. My coal stove pipe does get hot though...

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Lightning
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Hand Fed Coal Furnace: Overmodified/Bored out Clayton 1537
Coal Size/Type: Anthracite/Awesome Size
Location: Olean, NY

Post Sun. Sep. 23, 2012 12:47 pm

Did someone say stove pipe corrosion? This is what one summer of warm humid air mixed with fly ash looks like hahaha.... I know, you guys told me so lol!! This year I rebuilt the top of my mason chimney that I will be using instead of the stove pipe chimney. Can't wait to take it for a test drive!!
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IMG_20120923_123816.jpg

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titleist1
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Posts: 4404
Joined: Wed. Nov. 14, 2007 4:06 pm
Hot Air Coal Stoker Stove: Harman Mag Stoker (old style) one in basement, one in workshop
Hand Fed Coal Stove: Harman Mark III on standby for long power outages
Coal Size/Type: Rice/Anthracite; Nut/Anthracite
Location: Cecil County, MD

Post Sun. Sep. 23, 2012 9:10 pm

Yes it is common for the black pipe to get corrosion after a couple years. I usually replace the black stove pipe every two to three years depending on how well I cleaned it at the end of the season. I still have the same double wall SS thimble & chimney that was installed in 1992. It is in good shape still. The only part that corroded away from the original install was the screen and straps on the chimney cap. I rigged up some 12gauge copper to hold it in place last year and the copper looked fine this spring. I'll be checking that to see how it fared over the summer before too long.
I drive a VW TDI, heat my home & workshop with two coal stokers and have two vintage JD diesel tractors....
The EPA just loves me!!

jeff216410
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Posts: 62
Joined: Wed. Oct. 20, 2010 11:51 am
Stove/Furnace Make: Liesure Line Hearth

Post Tue. Oct. 02, 2012 2:51 pm

Stainless is the way to go with the coal. It is well worth the added expense to do it once. Everytime I clean my stove the inside of the pipe looks shiny new. Don't forget to use the stainless screws.

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Wiz
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Stoker Coal Boiler: Keystoker Ka 6
Coal Size/Type: Casey Junk Coal :(
Location: Tannersville Pa

Post Tue. Oct. 02, 2012 8:14 pm

What I would do? Knowing what coal ash combine with moisture does to black pipe & ss,I would do the cheaper of the two.
Poconoeagle wrote:clean and wash it out with baking soda/water solution and dry and spray with LPS-3
Then at end of season follow Poconoeagle instructions.
Randy
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SMITTY
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Joined: Sun. Dec. 11, 2005 12:43 pm
Stoker Coal Boiler: Patriot Coal - (custom built by Jim Dorsey, Taunton MA - RIP 4/18/13)
Hand Fed Coal Stove: Harman Mark III (SOLD!)
Coal Size/Type: Rice / Blaschak anthracite
Other Heating: Oil fired Burnham boiler
Location: West-Central Mass

Post Tue. Oct. 02, 2012 8:30 pm

Oh yeah - corrosion is real! :D

This was after sitting in my wet basement for just 4 short months ... and the second pic is 304 stainless in the same timeframe:
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Berlin
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Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal
Location: Buffalo/Adirondacks, NY

Post Tue. Oct. 02, 2012 8:35 pm

I like 26gauge or heavier galv. pipe sprayed black; cheap & readily available. For some reason people on here think they're going to die of zinc fume poisoning if they use it with coal :roll:

No reason to go with stainless, if you're in such a humid environment that galv. or black won't last longer than two or so years, stainless won't last long either.
Burning western Pennsylvania Bituminous in WNY using model 77 stoker furnace. BITUMINOUS equiptment: 2 hand fired stoves of my own design, Many Combustioneer Model 77 stokers, stokermatic furnace, Many Will-Burt stokers, & and Two Iron firemen.

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Rob R.
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Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Tue. Oct. 02, 2012 8:38 pm

So the black paint seals in the zinc? :D

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Berlin
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Hot Air Coal Stoker Furnace: Will-Burt Combustioneer 77B
Coal Size/Type: Ohio BITUMINOUS pea stoker coal
Location: Buffalo/Adirondacks, NY

Post Wed. Oct. 03, 2012 1:27 am

Rob R. wrote:So the black paint seals in the zinc? :D
That's right... :roll:

(no, but it makes it look better in a living area)
Burning western Pennsylvania Bituminous in WNY using model 77 stoker furnace. BITUMINOUS equiptment: 2 hand fired stoves of my own design, Many Combustioneer Model 77 stokers, stokermatic furnace, Many Will-Burt stokers, & and Two Iron firemen.

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Rob R.
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Posts: 11363
Joined: Fri. Dec. 28, 2007 4:26 pm
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy
Location: Chazy, NY

Post Wed. Oct. 03, 2012 6:31 am

I am going to use your idea at my brothers house. We are installing an EFM and Hitzer stove, and black painted galvanized seems like just the ticket.

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I'm On Fire
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Hand Fed Coal Stove: DS Machines DS-1600 Hot Air Circulator
Location: Vernon, New Jersey

Post Wed. Oct. 03, 2012 9:12 am

I replace the black pipe pretty much every season. It's cheap and I'd rather have a new piece of pipe every season instead of wondering whether or not the pipe is going to fail a few weeks into the heating season.

Coal is cheap. But it's still more expensive than a piece of cheap metal.

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whistlenut
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Stoker Coal Boiler: AA130's,260's, AHS130&260's,EFM900,GJ & V-Wert
Hand Fed Coal Boiler: Franks,Itasca 415,Jensen, NYer 130,Van Wert
Hot Air Coal Stoker Furnace: Alaska, EFM, Keystoker, Yellow Flame
Hot Air Coal Stoker Stove: Alaska, Keystoker-2,Leisure Line
Hand Fed Coal Stove: Alaska, Gibraltar, Keystone,Vc Vigilant 2
Hand Fed Coal Furnace: Ford, Jensen, NYer, Van Wert,
Baseburners & Antiques: Glenwoods
Coal Size/Type: Barley, Buck, Rice ,Nut, Stove
Other Heating: Oil HWBB
Location: Central NH, Concord area

Post Wed. Oct. 03, 2012 9:35 am

It isn't just coal burning that is corrosive to black or galvie pipe. Plenty of oil burner pipes that won't last 5 years also.
Every year make damned sure of no problems.....either keep the new parts on hand or replace it. Cheap money to insure your family, and pets are protected. Brush the chimney just for kicks; could be a birds nest or squirrel nest in there.

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EarthWindandFire
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Hot Air Coal Stoker Furnace: Leisure Line Lil' Heater.
Other Heating: Oil Furnace and Kerosene Heaters.
Location: Connecticut

Post Wed. Oct. 03, 2012 2:11 pm

What about applying a heat-tolerant epoxy coating?

You could also have the pipe electroplated with chrome? 8-)
Mark

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