Rupture members, when used in parallel with a relief valve, are not to exceed what percentage above the designed working pressure?

When discussing rupture members used in conjunction with relief valves, the critical safety standard is that these members should not exceed 20% above the designed working pressure. This limit is established to ensure safe operations and prevent potential failures in systems that could lead to catastrophic events.

The rationale behind this percentage is grounded in maintaining system integrity; exceeding the design pressure by more than 20% can create conditions that may compromise the effectiveness of both the rupture member and the relief valve, risking equipment failure or system overload. Keeping the pressure increase within this limit maximizes safety while still providing a reliable means of pressure relief, allowing the system to function effectively without undue risk.