Striker, welcome to the forum from the Buffalo Commons. Please take the time to introduce yourself in the new member category. We love to hear more information about new members.
To address your question, I usually use propane for cutting and K-tanks for oxygen. Make sure you have a propane tip and I use a # 3 or 4 for most of my scrapping. Setting your gauges at 10 for propane and 40 for the oxygen will save fuel for most cutting. For thicker metal you can increase oxygen to 60 or higher since it does the cutting. No need to change the propane since it just heats the metal. A secret for efficient cutting is to remember the metal is actually your fuel in the cutting process.
Liquid oxygen is mentioned above and one canaster is equal to 17 k tanks. Liquid oxygen tanks bleed themselves so they only pay for themselves if you have a lot of cutting to do.
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