Pre-weld checks set you up for success, ensuring material compatibility and clean starts. Check joint fit-up; gaps lead to penetration issues. Match fillers—use ER70S-6 for mild steel MIG to avoid. Weld quality is determined by a combination of visual inspections, nondestructive testing, and destructive methods to distinguish high-quality welds from common defects like porosity, cracks, and incomplete penetration. In industrial projects, welds are. To ensure the satisfactory performance of a welded structure, the quality of the welds must be determined by adequate testing procedures. 2 billion in 2024 and will grow to USD 2. For deeper analysis, use a liquid penetrant kit to reveal hidden surface-breaking flaws or perform a “bend test” on scrap pieces to verify.