To adjust the welding current and speed of a used pipe welder for pipes of varying thicknesses, it's first important to establish a basic adaptation logic based on the pipe's material properties. Different pipe materials exhibit significant differences in thermal conductivity and melting points, which directly determine the required energy input during welding. For example, if parameters for a pipe with high thermal conductivity and a low melting point are set according to those for a high-melting-point material, burn-through is likely to occur. Conversely, if the current is insufficient or the speed is too high for a pipe with slow thermal conductivity and a high melting point, inadequate fusion can result. Therefore, before making adjustments, it's important to first understand the pipe's material properties. This will then serve as a preliminary guideline for adapting the current and speed. This ensures that subsequent adjustments are tailored to the material's characteristics and a