So, What Exactly Are the Objections to Galv. Flu Pipe?

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Berlin
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Post Sat. Jan. 23, 2010 2:52 am

Once again NFPA fails to take into account differences in solid fuels. the heavier pipe requirement is there for wood burners- a creosote fire in the stack could be more likley to burn through the thinner galv. pipe. In coal the worst that would happen is to burn a hot fire in which case (on a hand-fired) will oxidize the zinc. Wood also has much higher EGT's than coal of any veriety in a hand-fired or stoker thus the zinc would burn off within the first few fires leading to zinc fume in the home and leading to an even less corrosion resitant/durable pipe.


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Richard S.
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Post Sat. Jan. 23, 2010 3:28 am

steamup wrote: NFPA 211 - prohibits galvanized pipe for use as chimney connectors on solid fuel appliances.

I am not sure what year NFPA added this.

Depending on the Local Authority having Jurisdiction, NFPA may or may not be enforced.
All I know is galvanized pipe is standard for installation here. It would be strange to not find galvanized pipe, the only time I ever see the heavier black pipe used is when someone wants it to look good.

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Post Mon. Jan. 25, 2010 11:52 am

whistlenut wrote:It will last at least 40 years. Just have a clean-out in the bottom, and use it. I see a lot of 8" well casing chimneys in my travels, also. Lots of culvert pipe also in huge units. Folks in the city don't usually do this, however in the country......... :D
thanks for the inf, well looks like Im set then. NO LIBS AROUND HERE! :rambo3: :rambo: :rambo2:

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lumpocoal
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Post Thu. Jan. 12, 2012 11:40 am

here is my objection
FYI= the piece of galvanized to the top right was put on in october of '11 so 3 months, and this is what it looks like, but in my case this is the chimney top extension, it gets what the element outside throw at it
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Dennis
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Post Thu. Jan. 12, 2012 12:03 pm

When living my parents home years ago,we also had a steel 10" gas pipeline for a flu pipe.When you said that you wack the pipe ,we also done that and cleaned all cresote out with one hell of a bell sound. Our steel pipe would always sweat from being uninsulated and open to the elements.Your galv. pipe extention being at the top collecting the moisture and along with the sulfuratic acid eat away much quicker.

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lumpocoal
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Post Thu. Jan. 12, 2012 12:05 pm

Dennis wrote:When living my parents home years ago,we also had a steel 10" gas pipeline for a flu pipe.When you said that you wack the pipe ,we also done that and cleaned all cresote out with one hell of a bell sound. Our steel pipe would always sweat from being uninsulated and open to the elements.Your galv. pipe extention being at the top collecting the moisture and along with the sulfuratic acid eat away much quicker.
Exactly, and when I do whack it it really echos through the valley here lol

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lumpocoal
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Post Thu. Jan. 12, 2012 12:08 pm

I was actually thinkin about using some rolled insulation and wrapping it all the way up...but I figured that could possibly hold moisture, I have seen that done out here in the boonies

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Dennis
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Post Thu. Jan. 12, 2012 12:10 pm

Yes, it really echos and quite deafening. That brings back some childhood memories.


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Dennis
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Post Thu. Jan. 12, 2012 12:17 pm

lumpocoal wrote:I was actually thinkin about using some rolled insulation and wrapping it all the way up...but I figured that could possibly hold moisture, I have seen that done out here in the boonies
You would have to make it water proof and moisture proof or you would rust and rot the steel pipe with the wet insulation.I'd leave it the way it is.Don't need to climb the roof to clean,just a wack standing on the ground.The pipe at my parents house has been standing since the early 70's.

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lumpocoal
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Post Thu. Jan. 12, 2012 12:26 pm

yeah I decided not to, it seems to be in good shape still just my connector pipes have to be replaced every year, now that I don't have that blockage in it, it is burning fabulously never had it burn this good, now when I load a fresh load, you can hear the handle springs on the Hitzer vibrating and you hear it rumbling up the chimney lol

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Post Thu. Jan. 12, 2012 12:34 pm

Just make sure the elbow/90 degree turn on the steel pipe is clear,thats where all the soot and dried cresote fell. Having a 6" pipe it might clog up quicker.

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Post Thu. Jan. 12, 2012 12:43 pm

It was clogging there, I havent burned any wood since I got my coal last month, but that pc of sheet metal wasnt letting it draft well and I was gettin alot of fly in my connector pipes having to clean every other day, its raining now but I will go out and "tap" on everything lol when it stops raining, my thermostat door has been working real good too now, when it starts getting close to closing you can her it clancking pretty good now

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Post Thu. Jan. 12, 2012 1:09 pm

Galvanized pipe is cheaper to buy, easier to work , and lasts much longer than black. If your stack temperature is so high that the zinc gives off fumes, then the fault is in the stove or how it is run.

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Post Thu. Jan. 12, 2012 1:14 pm

I run the heavy gauge black pipe inside with no MPD from stove to insulated section exiting the basement, then insulated to black up to the chimney connection

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Post Thu. Jan. 12, 2012 1:21 pm

here is the pipe route, 90 off stove 2 ft up to 90 into insulated, then outside is the same in reverse,90 off insulated 2-2 ft then 90 into chimney, I have too many 90s but this is how I have to do it
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Last edited by lumpocoal on Thu. Jan. 12, 2012 1:34 pm, edited 1 time in total.


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