What must the maximum allowable working pressure for a boiler not exceed?

The maximum allowable working pressure (MAWP) for a boiler is fundamentally governed by the standards set forth by the American Society of Mechanical Engineers (ASME) codes. These codes are critical because they establish the design, construction, and inspection requirements for pressure vessels, ensuring they can operate safely under specified conditions. The ASME codes provide a standardized guideline that ensures the integrity and safety of boiler systems across various applications.

By adhering to the ASME standards, operators can ensure that their boilers are built and maintained to withstand safely the pressures expected during operation. While manufacturer guidelines and local building codes may also provide specifications or limitations on pressure, they ultimately must align with or reference the ASME codes. Therefore, the pressure determined by ASME codes is the definitive standard that establishes the maximum allowable working pressure for boilers, ensuring safety and compliance within the industry.