At what percentage is the safety set on a boiler?

The safety set on a boiler, which refers to the pressure relief valve setting to prevent overpressurization, is commonly set at 6% above the operating pressure. This safety margin is crucial for ensuring that the boiler operates safely and within its design specifications. By having the safety set at this percentage, it allows for minor fluctuations in pressure without triggering the relief valve unnecessarily while still providing essential protection against potentially hazardous conditions resulting from overpressure situations.

In the context of high-pressure piping systems and boiler safety standards, this setting reflects the industry best practices for maintaining safe operation and mitigating risks associated with pressure-related failures.