For a low pressure boiler, how much can the safety valve rise above the MAWP?

The correct answer is that for a low pressure boiler, the safety valve can rise above the Maximum Allowable Working Pressure (MAWP) by 5 psi. This is an important safety standard, as safety valves are designed to prevent the pressure within the boiler from exceeding safe limits.

The 5 psi rise allows for some tolerance in pressure fluctuation due to operational conditions and helps ensure that the safety valve operates effectively under varying pressure situations. If the safety valve were to have a rise that exceeds this limit, it could potentially lead to unsafe operating conditions.

Understanding this standard is crucial for maintaining safe boiler operations and ensuring compliance with regulations, as well as recognizing the importance of the safety valve’s role in pressure control.