🔍Valve Testing Procedure – Ensuring Safety and Performance in Critical Operations In large-scale industrial projects—whether in Oil & Gas, Petrochemicals, Power, or Water—the reliability of valves plays a decisive role in the overall safety, operability, and performance of the system. Valve testing is not just a routine process—it’s a crucial validation step before putting systems into service key valve tests performed during manufacturing (FAT), installation (SAT), and commissioning phases: 1.