What is hot pass means in welding?

A hot pass in welding refers to a specific technique where a second pass of weld metal is applied over the initial weld bead while it is still warm. This approach helps to enhance penetration and improve the overall quality of the weld by allowing for better fusion between layers. Hot passes are commonly used in multi-pass welding processes to ensure strong, defect-free joints. The technique is particularly useful in applications involving thicker materials.