Follow requirements in OSHA 1910. 252 (a) (2) (iv) and NFPA 51B for hot work and have a fire watcher and extinguisher nearby. The installation, operation, and maintenance of arc welding equipment and employment of procedures described in this document should be conducted only by qualified persons in accordance with applicable codes, safe practices, and manufacturer's instructions. Always be certain that work areas are. Only spot welding is carried out at the corners of the box every few centimeters, while the remaining seams are filled with sealant. This process does not show any problems in the short term, but after a year of outdoor exposure to sun and rain, the sealant ages and cracks, and water vapor will. Consult sym-bols and related instructions below for necessary actions to avoid the hazards. This abstract explains the NDE methods employed to determine the weld nugget size which is the key factor in optimizing the weld current and the weld cycle in a spot welding process. Understanding and applying the correct resistance spot welding standards ensures product quality, safety, and process. This comprehensive guide will elaborate into the intricacies of spot welding, exploring its principles, processes, equipment, advantages, disadvantages, safety considerations, and future trends. Whether you're a seasoned welding professional, a budding engineer, or simply curious about this.