Capped, welded up on the inside and out. Outside edges smoothed and rounded to give a "solid one piece" look.
I'm also open to suggestions and comments. Good and bad, and criticism! Hope yall enjoy the build, I know I'm going too!
here is a thread to a build I did last spring http://www.smokingmeatforums.com/t/161138/heres-what-i-have-so-far-suggestions
I used a pipe much like yours with flat ends and ended up with some issued with the heat getting choked up at the one end. if you look at the thread you can see that I used a scoop on the one end to let the air flow past my RF plate. You might want to think about adding that in to your design.
As a metal shop teacher I give your welds an A :-)
I also have an update on the build. I was able to work another couple hours on my smoker today. I got the legs put on so I can finally get her self standing and got my door and hinges and door stop welded on! I know the legs look skinny but they are 1/4" thick and I plan on connecting all the legs together making a 1 foot deep basket to hold all of my wood..here are a few pictures of today's progress!
Also please excuse the lifting eye on the door, i was in the shop alone and that was the easiest way to lift it by myself and the overhead crane. haha It will be cut off!
I was able to finally do a little more work on the smoker today after work..i got the stack built and counter sunk into the chamber and welded up, and i also got the flatbar welded onto the lip of the door to help seal it up. Im going to order and attach a nomex smoker gasket under the lip for a good air-tight seal. Also got into the chamber while i had the torch out, and was able to cut out the firebox entrance hole. Tell me what you guys think so far. Feel free to add suggestions and comment as you please. Positive or negative! Hope you guys are enjoying it so far!
Well this is my first time seeing a set up like this one with such a vertical transfer of heat and the "not so typical" RF set up. I LOVE IT! Reasonable man theory leads me to believe that it will be an extremely fuel efficient cooker. Something I would think about is the occasional cleaning process. If you could allow your heat transfer tunnel (only thing I can call it) to be installed and inch or more inside the cooking chamber...allowing for a good water hose steam cleaning to be done successfully without the water leaking into the "hot box". I'm just talking long term care thats all. Thread saved for seeing the final product!
Very nice! Are you going to mount a RF plate in the center of the cook chamber? If so, remember with a center firebox, you can cut down on the area under the plate and the opening at the ends since the smoke has two places to escape and doesn't have as far to go.