Visual inspection is the most important step in welding quality control. Before NDT, inspectors rely on simple but effective tools like welding gauges, borescopes, flashlights, and proper lighting conditions. As per BS EN ISO 17637, correct eye distance, viewing angle, and illumination make a huge difference in defect detection. From checking weld size and alignment to inspecting restricted areas, visual examination saves time, cost, and rework. Mastering these basics is essential for every weld