8515.31.00.00 - Fully or partly automatic

This HTS category, 8515.31.00.00, specifically covers fully or partly automatic machines and apparatus designed for arc (including plasma arc) welding of metals. These machines are characterized by their automated operation, meaning they can perform welding tasks with minimal or no direct manual intervention beyond initial setup and programming. This automation can range from fully robotic systems to semi-automatic units that automate specific parts of the welding process.

This classification is distinguished from its sibling, 8515.39.00 ("Other"), which encompasses machines and apparatus for arc welding that are not fully or partly automatic. Therefore, the key differentiator is the level of automation. Goods classified under 8515.31.00.00 are designed for efficient, repeatable welding operations driven by programmed sequences or automated feeding and manipulation systems, as opposed to manually controlled welding processes.

As this is a leaf node in the HTS structure, there are no further subcategories. Classification within 8515.31.00.00 is determined by the presence of automatic or semi-automatic features for arc or plasma arc welding. The focus is on the machine's capability to perform welding functions without continuous direct human operation, distinguishing it from manually operated welding equipment.