Hi, all. I'm looking to build a Hookway biochar
retort, which basically consists of a rocket stove
running through a 55 gallon steel drum that holds the biochar feedstock. As the feedstock pyrolyzes, the flammable gases are fed into the combustion chamber to sustain the charring process.
The original plans
call for using 6" diameter stainless steel (304) pipe, but I have the opportunity to pick up some 5" 304 stainless pipe at a much lower cost. Given that the combustion chamber is about 1 foot long, and the heat riser is about 3 feet tall, would you expect 5" pipe to still work satisfactorily?
Thanks for your insights.