Yes, Josh, this is an atm. open system. I do not want the flu gas get below about 150 C. But am not sure the T drop across the length of heat exchanger. Since this is a copper 150 cm long... Do you know any on line calc. to aid on this ? I will burn waste oil, guess the temp. will be about 600-700 C...

Hi, Forum, I am newbie in TIG welding. Planning soon to weld simple heat exchagers for home heating. The source of heat will be waste oil stove, and itting on top of this will be vessel filled with water, capturing hot gasses in H/E. I have 350 liters SS cylindrical vessel with cone shaped caps, 1.5...

Hi everyone ! I am beginner welder, have moderate experience in MMA, just began simple MIG, and plan to try scratch TIG very soon. Have simple MMA/TIG , MIG machines and plasma cutter. Plan to weld carbon and SS for my home heating and tooling this month. Looking forward to learn welding wisdom and ...