What does the term "test pressure" refer to in regard to boilers?

The term "test pressure" specifically refers to the pressure applied during testing to ensure that a boiler is functioning safely and effectively. This pressure is typically higher than the normal operating pressure of the boiler and is used during inspections to check for leaks and verify the structural integrity of the boiler components. Testing at this elevated pressure helps identify any weaknesses or potential failure points that could compromise safety.

In the context of boiler operation, maintaining safety standards is paramount, and test pressure plays a crucial role. While other options touch on various aspects of boiler operations—such as normal operating pressure, maintenance pressure, and design limits—none accurately capture the purpose of test pressure the way that testing for leaks and structural integrity does.