We get this question a lot! The best source for regulator pressure- setting is your owner’s manual! The manufacturers have done all the experimentation for you. They have recommended regulator output- pressure settings for every tip style and size they make and every metal thickness you are cutting, brazing, or welding. If you have no manufacturer setting- information available:
Single-hole tips are usually stamped with a one or a two-digit number. Set both your fuel-gas regulator and oxygen regulator pressure to this stamped number- value.
For example: A tip stamped “4” will require 4 psig fuel gas pressure, and 4 psig oxygen pressure.
CUTTING TIP RULES OF THUMB DO NOT APPLY TO INJECTOR-STYLE CUTTING TORCHES!
Recommended oxy/acetylene cutting tip pressures vary with size. If you have no manufacturer setting- information, and are cutting less than 1 ½” thick steel, set the acetylene regulator for 10 psig, and the oxygen regulator for 40 psig.
Recommended oxy/ fuel gas (propane, propylene, natural gas) cutting tip pressures also vary widely with size. If you have no manufacturer setting- information, and are cutting less than 1 ½” steel, set the fuel gas regulator for 10 psig, and the oxygen regulator for 45 psig.
There is no rule of thumb for multi-flame heating tips! If you have setting and use questions concerning “rosebud” tips, call us! We may be able to help you avoid serious flashback and /or melt-down issues resulting in fires!