Gas Fitter Practice Test

What is the maximum operating pressure of a low pressure steam boiler?

1. 5 psig (35kPa)

2. 15 psig (100 kPa)

3. 100 psig (690 kPa)

4. 150 psig (1035 kPa)

The correct answer is: 15 psig (100 kPa)

The maximum operating pressure of a low-pressure steam boiler is defined as 15 psig (100 kPa). This classification is primarily set by standards and regulations governing boiler safety and operation. Low-pressure steam boilers are typically used in applications such as space heating, process heating, and for certain industrial processes where steam is required but the operational pressure does not exceed this limit. Understanding these classifications is essential because exceeding the defined pressure threshold can lead to inefficiencies or safety hazards. It's also important to note that while higher pressure systems exist, they fall under different categories, such as high-pressure steam boilers, which are capable of operating at pressures significantly above 15 psig. Therefore, the designation of 15 psig as the maximum operating pressure for low-pressure steam boilers is a critical standard for safety and operational efficiency.