What is the popping point tolerance for pressures of 1000 psig and above?

The correct answer of 1% for the popping point tolerance for pressures of 1000 psig and above is based on regulations governing high-pressure boiler safety. The popping point refers to the pressure at which a safety valve is designed to open to prevent overpressure conditions in a boiler system.

For pressures of 1000 psig and higher, a tolerance of 1% is permissible to allow for some variability in the manufacturing and installation of safety valves. This percentage tolerance ensures that the valve can operate effectively within acceptable safety margins, allowing for any minor discrepancies between the set point and the actual opening pressure.

This tolerance is critical for maintaining safety in high-pressure systems where even small deviations can lead to dangerous situations. By adhering to this standard, operators can ensure that their safety valves function within expected parameters, thus enhancing boiler safety and compliance with regulatory standards.