So today I finally did some work on the boiler. Its been a busy summer but I have some much needed time to work on the boiler now.
I picked up about 80 feet of Sch 10 4" and got an old piece of 5" Sch 40 (10 ft) for the first piece connected after the secondary combustion chamber.
I decided to take the cheap deal on the banged up sch 10. After Peacmar mentioned the fact that commercial boilers use such thin pipe I think sch 10 is enough. I'm sure it will last at least a few years, if it corrodes right through eventually then I guess ill rebuild it then with some better stuff.
A copper cold return line is a very good idea, I have added that to my plan.
The only piece of pipe that I could find at the scrap yard for the secondary was 18" diameter
. I plan to cast my own refractory on the inside which will reduce the ID to about 14"? maybe even 12", I have not decided exactly how thick I will make it.
I started tapering the secondary chamber down to 5" pipe size and cut some elbows to make a 180 back to the face of the boiler. Where the exhaust fan will be. I need some tips for the plasma cutter to finish getting the secondary chamber ready to weld, I am almost half done forming it down to 5". The 5" 180 bend is ready to weld but I have to pick up some 6010 to weld it.
I am anxious to test out the Synchrowave 250 that I picked up Friday.
I have been enclosing my pole barn over the summer also so I have half finished projects all over the place. Finally got a 100 amp service all hooked up so at least I have some power in there now.
Thats where im at now so hopefully i get some more work done tomorrow. Next on the list I think I will start building the fan enclosure and intake pipe. Monday will be a good day after i pick up some plasma cutter parts and welding rods.
Thanks everyone for all the info and comments
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