During safety valve testing, what percentage of popping pressure must be achieved?

In safety valve testing, achieving 75% of the set popping pressure is critical for confirming that the valve will function correctly under pressure conditions. This percentage ensures that the valve is responsive and will open when pressure reaches a level close to its design specification. Testing at this level helps to verify the integrity of the valve and its ability to prevent overpressure situations.

The rationale for setting this threshold at 75% is to ensure a balance between safety and functionality. A lower threshold might not adequately test the valve's ability to function under normal operating conditions, while aiming for 100% during testing may put unnecessary stress on the valve, leading to potential wear or damage. This is why the 75% level is commonly accepted in industry standards during such testing procedures.