What happens if a boiler's pressure exceeds its rated capacity?

When a boiler's pressure exceeds its rated capacity, it poses significant risks that can lead to potential failure. A boiler is designed to operate within specific pressure limits established during its construction and testing phase. Operating beyond these limits can result in mechanical failure due to the excessive stress placed on the boiler components, such as pipes, welds, and fittings. This can lead to catastrophic events, including explosions or serious leaks, which could endanger both personnel and property.

Furthermore, when pressure exceeds the rated capacity, the safety mechanisms, such as relief valves, may become ineffective. These safety devices are crucial for relieving excess pressure and protecting the boiler from failing. If the pressure continues to increase unchecked, even the most robust safety features may not be able to prevent a disastrous outcome.

On the other hand, increased efficiency, stable operation, and improved heating are not realistic outcomes of exceeding the boiler's rated capacity. In fact, operating a boiler at pressures higher than its design parameters often leads to decreased efficiency and can compromise the overall functionality and safety of the system.