What percentage of the popping pressure is required to test a safety valve?

To test a safety valve, it is required to apply a pressure that is 75% of the valve's set popping pressure. This percentage is established as a standard to ensure that the valve opens at a pressure that is adequate, while still being within the safety margin to prevent unintended operation. Testing at this level allows for an accurate assessment of the valve's performance and responsiveness without exceeding the maximum safety limits.

Understanding why this particular percentage is used helps ensure that the equipment operates safely and reliably under high-pressure conditions. Testing at 75% also helps in identifying any potential issues before the system reaches the critical pressure that could lead to failure. This practice is aligned with industry standards and helps maintain the integrity and safety of high-pressure systems.