What test is performed on a re-tubed boiler and at what water temperature?

The Hydrostatic Test is a critical procedure performed on a re-tubed boiler to ensure the integrity and safety of the system following maintenance. During this test, the boiler is filled with water, and pressure is applied to check for leaks and the structural strength of the components.

Conducting the Hydrostatic Test at a temperature of 70°F is advantageous as it allows for the water to remain at a stable condition, minimizing the risk of undue expansion or contraction that could occur at higher temperatures. This stable state provides a more accurate assessment of any potential weaknesses or leaks in the boiler system. Furthermore, a lower temperature simplifies working conditions for technicians, reducing risks associated with steam or high-temperature water.

This approach aligns with industry standards and ensures that the re-tubed boiler meets safety and performance requirements before it is returned to service.