What is the maximum pressure allowed for a low-pressure steam heating boiler?

The maximum pressure allowed for a low-pressure steam heating boiler is defined by safety regulations to ensure the safe operation of these systems. In most cases, the upper limit for low-pressure boilers is set at 103 kPa, which is equivalent to 15 psi. This standard is widely recognized in industry practices and ensures that the equipment can operate safely without the risk of exceeding pressures that could lead to equipment failure or safety hazards.

The significance of this pressure limit is rooted in the design and materials used in low-pressure boilers, which are specifically engineered to handle steam at lower pressures. Exceeding this maximum could compromise the structural integrity of the boiler and lead to potentially dangerous situations, such as bursts or leaks.

This 103 kPa threshold also defines the operational zone for low-pressure steam heating systems, ensuring that they remain effective for their intended purposes, such as heating buildings and industrial processes. The regulation is part of the broader framework aimed at ensuring safety and reliability in steam generation.

Therefore, the correct choice reflects the standardized maximum pressure that low-pressure steam heating boilers are allowed to operate under, emphasizing the importance of adhering to defined operational limits for safety and efficiency in boiler operation.