In which scenario is freehand welding most applicable?

Freehand welding is most applicable in scenarios where space constraints make it difficult to use fixtures or positioning equipment. Welding in tight spaces frequently requires the welder to maneuver into awkward positions, where using jigs or automated systems may not be feasible. The ability to perform freehand welding allows a welder to have better control and dexterity needed to reach those challenging areas while maintaining the quality of the weld.

In production assembly lines, precision and repeatability are often prioritized, which generally favors the use of fixed setups or automated systems. Heavy structural welding typically involves larger components, which could be better suited for using fixtures and equipment to ensure accuracy and strength in the final assembly. Similarly, automated welding systems are designed for efficiency and consistency, making them less applicable in situations where the welder needs to adapt dynamically to each individual weld location, as is often the case in tight spaces.