Mig Welding Co2 Pressure. MIG welding is an arc welding process in which a continuous solid wire electrode is fed through a welding gun and into the weld pool joining the two base materials together. Regulators designed for CO2 will usually range from 50 to 80 PSI.
Typically you need 15 to 40 CFH of gas for metal thickness ranging from 18 34 inch. The pressure is reduced to a usable level by a device called a regulator In MIG welding school all of the machine controls are set on the co2 welding machine itself. A shielding gas is also sent through the welding gun and protects the weld pool from contamination.
Your mig setup will not need the splitter Peashooter gauges can be useful but on mig you will need to disable.
This is because CO2 is in a liquid state in the high pressure cylinder. 100 Carbon Dioxide is widely available and is the cheapest gas to purchase at the welding supply store. The gauge on left is your bottle pressure and on CO2 will only lift the needle form its current position 0 call it 7 oclock to about 8 or 9 oclock as CO2 is a liqued under pressure and you measure bottle contents by weight. Mig Welding Gases Tested Using a Hobart IronMan 230 Mig Welder in the USA co2 mig welding gas is often considered to be inferior to c25.