Piping for the Exhaust

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bsilver
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Post by bsilver » Sun. Dec. 20, 2009 11:02 am

I managed to find a baro damper and had to buy a T joint to put into the stove. I got it assembled, and today hope to get it installed in the stove.

Seems simple in theory; there's an elbow out of the stove, a straight, then an elbow into the chimney. Remove the screws, slide out the straight piece, slide in the T joint with the baro, start getting to stove re-fired again and hope there's some improvement,...at least, that's the theory.

My wife said, "I thought you had to get something special for the pipe, something about corrosion." Crap. There is something in the dark corners of my memory about corrosion that related to coal burning and I'm not sure what it was.

The T is just some galvanized flue pipe...looks aluminum colored instead of the black painted pipe currently in the stove. I figured having silver pipe stuck in the middle was something I could live with since this isn't a decorative stove or one in a high-traffic area of the house; it didn't have to be really pretty or anything. But did I make a mistake in buying a $14 T-joint without specifying at the heating store (HEP, if you've heard of them) that this was for a coal stove? Do I need to get something else before I go through the trouble of trying to assemble this pipe, only to find that I'll need to again kill the fire and disassemble it again??

 
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SMITTY
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Post by SMITTY » Sun. Dec. 20, 2009 11:08 am

I would just use it until it falls apart. If you have a dry area, that time will be extended greatly ..... and even further if you remove & clean the pipe the minute you shut down for the summer, & store it in a dry place indoors somewhere.

 
franco b
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Post by franco b » Sun. Dec. 20, 2009 1:29 pm

It sounds like you have galvanized pipe, that is, Zinc coated to prevent corrosion.

This pipe is not recommended for wood stoves owing to the high stack temperatures in a wood stove, the zinc could vaporize and is a health hazard. For coal stoves that have modest stack temperatures it is fine. In the days when most homes were heated with coal the pipe was galvanized to last a few years longer. As Smitty pointed out, clean it right away after use and store it in the driest place you can for the summer and it will last for many years.


 
bsilver
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Post by bsilver » Sun. Dec. 20, 2009 2:05 pm

So...basically, this shouldn't be a problem as long as I don't notice visible corrosion or issues with it? Just keep an eye on the pipe?

 
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Cheetah
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Post by Cheetah » Sun. Dec. 20, 2009 3:40 pm

Galvanized should last longer than black. I just installed a galvanized pipe on mine and spray painted it black with high temp paint ment for automotive exhausts.

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