What torch angle provides the best shielding gas coverage?

A torch angle that is close to perpendicular offers the best shielding gas coverage during Gas Tungsten Arc Welding (GTAW) because it directs the shielding gas effectively toward the weld area. When the torch is held perpendicular to the workpiece, it allows the gas to flow evenly around the arc, forming a protective envelope that minimizes contamination from atmospheric elements such as oxygen and nitrogen. This optimal angle ensures that the weld pool is adequately shielded, reducing the risk of defects such as oxidation and porosity in the weld.

Maintaining a perpendicular angle also aids in stabilizing the arc length and improving arc control, which can contribute to a more consistent and higher-quality weld. In contrast, other angles, such as 15 degrees or 30 degrees, may compromise the gas flow or coverage, leading to less effective protection of the molten weld pool. Holding the torch horizontal may also lead to inadequate gas shielding, as it can allow turbulence in the gas flow, exposing the weld area to potential contaminants. Therefore, a close to perpendicular torch angle is essential for producing clean and strong welds in GTAW.