Power Eng 1st Class Practice Questions - SOPEEC 1st Class Power Engineer Exams Exam

The safety valves must be sized to discharge all the steam the boiler can generate at maximum firing rate without pressure rising more than 6% above the set pressure. The safety valves must be sized based on the nominal steam outlet piping diameter, irrespective of boiler heating surface. The safety valves must prevent drum pressure from exceeding 110% of design pressure under any operating conditions. The safety valves must be sized such that the total relieving capacity matches the feedwater pump's maximum runout flow rate.