EarthJuice Posted November 4, 2013 Share Posted November 4, 2013 So I'm nearly finished with my forge (up reading from a brake drum forge) and I was wondering what I need in terms of stove pipe. Ive already got two pieces of galvanized stove pipe, but I'm concerned about the galvanized with the heat of the forge. Should I get some black stove pipe? And if so how much of the chimney should be black stove pipe vs galvanized assuming the chimney will be 10 ft tall? Quote Link to comment Share on other sites More sharing options...
divermike Posted November 4, 2013 Share Posted November 4, 2013 I have been using commercial grade 10" spiral ducting, no problem, typical stove pipe is not big enough for a forge.. Coal smoke , as far as I know, will not cause the zinc to become airborne in the pipe system, I would suggest minimum 10 inch pipe. 3 feet above the roof, 2 feet above anything within 10 fet horizontal. Quote Link to comment Share on other sites More sharing options...
ThorsHammer82 Posted November 4, 2013 Share Posted November 4, 2013 use the galvi on the outside of the shop and black pipe, or something non-coated inside the shop. The further away from the fire, the cooler the stack will be. Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted November 4, 2013 Share Posted November 4, 2013 I just added about 16" of sheet steel to the bottom of my 10'x10" spirial seamed duct (US$4 at the habitat for humanity store sale) I also made the sheet steel part so I can pull it up on the pipe leaving a free area all over the forge for odd shaped projects---Though I have done some forge welds with one piece stuck up the pipe while the rest of the object is buried in the coal pile. (forge welded legs on a spider) Quote Link to comment Share on other sites More sharing options...
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