What is the typical operating pressure range for a third-grade steam engineer's boiler?

The typical operating pressure range for a third-grade steam engineer's boiler is 0-15 psi. This is considered a low-pressure classification and is consistent with the duties that a third-grade steam engineer is trained to manage.

Boilers operating within this pressure range are often found in smaller applications, such as heating systems in residential or light commercial buildings, where the demand for high-pressure steam is not a requirement. The lower pressure also reduces the risk of equipment failure and increases safety for operations under the engineer's supervision.

In contrast, other ranges such as 15-30 psi or 30-60 psi are associated with higher-capacity steam systems that would require different training and licensure, as they entail greater safety considerations and operational complexities.