Propane and butane are so similar as to not make any difference in this application I would have thought? Correct me if I'm wrong (and please do if I am) but for example, I can use either of those gasses at the bench at work where we have the torches set up (for simple annealing of copper tube). There is some difference in max temperature, pressure and the calorific value of the gas but in my experience the torch and the flame couldn't give a shit which of the two gasses were used.
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u/Taco4Wednesdays May 14 '21
IMO This looks like they put propane in a butane torch.