When should orbital welded test coupons be inspected?

The correct choice emphasizes the importance of regular inspections for orbital welded test coupons to ensure the integrity and safety of medical gas systems. Inspecting at the start of work establishes a baseline for quality and confirms that all parameters are set correctly for the welding process. Following that, conducting inspections every four hours helps to catch any potential issues or deviations that might arise during the work, enhancing the reliability and safety of the medical gas delivery system throughout the project.

This practice aligns with safety standards by providing a structured approach to monitoring and verifying the quality of the welds, which is especially critical in medical applications where failure can have serious consequences. Regular inspections help to maintain compliance with NFPA99 guidelines, ensuring that the medical gas systems are constructed safely and effectively. Regular checks reduce the risk of defects going unnoticed for extended periods, which could lead to larger, more costly issues down the line.