Rate of Flow in GTAW should be set how?

• A. As low as possible while still providing adequate coverage
• B. As high as possible to ensure full shielding
• C. Always fixed at 20 cubic feet per hour
• D. Adjust only with welding current

Answer: (A)

In GTAW, the shielding gas is there to blanket the weld pool from the atmosphere, so you want just enough flow to keep the shield intact. Setting the rate as low as possible while still providing full coverage minimizes gas waste and reduces the chance of turbulence that can pull air into the shield or disturb the arc. If the weld shows signs of contamination or porosity, or drafts are present, gently increase the flow until shielding is reliable; otherwise keep it at a modest level. The flow rate isn’t fixed by current alone—adjust it based on shielding effectiveness and environmental conditions.