What type of boilers operate at pressures exceeding 15 pounds per square inch?

High-pressure boilers are defined by their operation at pressures exceeding 15 pounds per square inch (psi). This classification is crucial in understanding the design, safety measures, and regulatory requirements associated with boiler operation.

These boilers, typically used in industrial settings, generate steam or hot water for various applications, which can include heating, power generation, and manufacturing processes. Given the higher pressures involved, high-pressure boilers require specific safety controls, maintenance protocols, and inspections to prevent hazardous situations, such as explosions or structural failures.

Understanding the distinction between high-pressure boilers and other types—such as low-pressure and medium-pressure boilers—is essential for compliance with mechanical codes and ensuring safe operation. Low-pressure boilers operate below 15 psi, while medium-pressure boilers typically function within a range that does not exceed this threshold but is still higher than low-pressure standards. Standard boilers is a less precise term and does not refer to a specific pressure classification recognized in mechanical codes.