Which shielding gas flow value is commonly used in GTAW?

Which shielding gas flow value is commonly used in GTAW?

• A. 5 cfm
• B. 20 cfm
• C. 40 cfm
• D. 60 cfm

Answer: (B)

In GTAW, shielding gas flow is chosen to maintain a stable, protective blanket around the weld without wasting gas or creating turbulence. A typical, versatile flow is about 15 to 25 cubic feet per hour, and around twenty CFH is commonly used because it reliably shields the weld in many situations. If the flow is too low, air can contaminate the molten pool, leading to porosity or oxidation. If the flow is too high, it can push gas away from the weld and waste gas, sometimes causing turbulence. So, a moderate flow near twenty CFH is a practical, widely used setting for GTAW.

In GTAW, shielding gas flow is chosen to maintain a stable, protective blanket around the weld without wasting gas or creating turbulence. A typical, versatile flow is about 15 to 25 cubic feet per hour, and around twenty CFH is commonly used because it reliably shields the weld in many situations. If the flow is too low, air can contaminate the molten pool, leading to porosity or oxidation. If the flow is too high, it can push gas away from the weld and waste gas, sometimes causing turbulence. So, a moderate flow near twenty CFH is a practical, widely used setting for GTAW.