Have not had to time visit the forum lately, but this topic spiked my interest. A lot more information can be added on torches since the last post.
I have tried all of the fuels now and I have to agree with Wadabar, one set of regulators, torch and hose can service propane and acetylene as well as many other fuels. The only difference is the tips. For general scrapping and metal work, this is the way I would go. My favorite torch is the Smith 21" gas axe. It has a lifetime warranty, reasonably priced, and has cut everything asked of it including 6 inch plate with the right settings.
Experience with all types of fuels allows flexibility depending on the job. If it was a commercial application like a scrap yard, I would recommend a petrogen torch. Although the initial investment is high, long term fuel and oxygen usage is minimal. A chart of heat differences in fuels, fuel/oxygen ratio, etc. will be posted on my thread when time permits. It will also list the amount of time expected to cut one foot of steel. Until you get into really thick steel, the time factor does not change.
Beardo, please PM me if you want more specifics. Good luck.
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