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Old 06-18-19, 07:57 PM
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Originally Posted by bark_eater View Post
Poking around I found a BTU calculator that gives the following with Propylene and the different flow rates.

T-6 5,927.5 BTU

T-4 1,138.08 BTU

I'm still not sure what it all means, but I've read about "hearth brazing" with propane which seems to be a lower temperature, high BTU process.
Hearth brazing uses a brick enclosure to reduce thermal conduction to the air and keep the work piece temperature up for faster and smoother brazing. It's essentially a cross between furnace brazing and torch brazing.
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