What is the maximum allowable working pressure of a low pressure boiler?

The correct answer is that the maximum allowable working pressure of a low-pressure boiler is not more than 15 psi. Low-pressure boilers are defined by regulations and codes that dictate their operational limits, with 15 psi being the upper threshold.

This classification is significant in maintaining safety standards, as higher pressures would categorize the boiler as a high-pressure boiler, which comes with different regulations and operational requirements. By knowing that 15 psi is the limit, operators can ensure they are complying with industry standards and avoiding potential safety hazards associated with operating equipment beyond its designated pressure range.

Understanding these pressure limits is crucial for those involved in the maintenance and operation of boilers, as exceeding them can lead to increased risks for damage and accidents.