Gas Flow Rate For Mig Welding Lpm. When you first fit your Gas Regulator to the Cylinder the cylinder will obviously be OFF. You want around 10 lpm at the torch shroud so as long as theres no leaks between the flow meter and torch set the flow meter at 10 lpm.
Gas Welding and Cutting Equipment will normally specify a Pressure in PSI or Bar. But Make sure to take into account the different variables while selecting the flow rate. It has the added benefit of giving a visual indication of when gas is actually flowing.
This flow rate is set on the tanks gas regulator to control the gas availability at the welding arc during the process.
For most average size welds youll want 25 to 30 cubic foot pounds per hour CFH but the thicker your metal is that youre welding the more gas CFH you will need to complete the weld and give it an aesthetically pleasing look. Mig and Tig Welders will normally specify a Flow Rate in Litres Per Minute LPM. Cubic feet of gas needed flow rate SCFH x hours of welding Sample Calculation 2. For most average size welds youll want 25 to 30 cubic foot pounds per hour CFH but the thicker your metal is that youre welding the more gas CFH you will need to complete the weld and give it an aesthetically pleasing look.