What is the typical gas flow rate for TIG welding?

• A. 5-10 CFH
• B. 25-30 CFH
• C. 40-50 CFH
• D. Around 15-20 CFH

Answer: (D)

Shielding gas flow is how you maintain a protective blanket around the weld puddle. In TIG welding, you’re protecting the molten metal from air (oxygen, nitrogen, moisture), and the flow rate has to be just right: enough to cover the weld, but not so much that it creates turbulence or wastes gas. The typical starting point for most TIG welds with a standard gas cup and normal setup is about 15–20 CFH. This range provides solid coverage for common materials like steel and aluminum under standard conditions.

If the flow is too low, shielding won’t be adequate and porosity or oxidation can occur. If the flow is too high, it can push gas away, create turbulence, or simply waste gas. Adjustments may be needed for larger cups, longer stick-out, or drafts, but 15–20 CFH is the conventional range you’d begin with.