What pressure is usually indicated as a red flag for potential issues in boiler operation?

A pressure above 15 psi is typically considered a critical threshold in boiler operation because it can signify potential problems or increased risks associated with the system. Operating above this level may indicate that the boiler is approaching or exceeding its design limits, which can lead to various safety hazards, including the risk of equipment failure or even explosions.

Pushing the pressure beyond 15 psi can also cause increased stress on the boiler components, such as the pressure vessels and piping, leading to accelerated wear or dangerous failures. Therefore, monitoring and maintaining pressure levels at or below this threshold is essential for safe and efficient boiler operation. Regular inspections and adherence to operational guidelines can help in preventing excursions above this critical pressure.