After the operation of steam turbine bypass heating system,frequent use of the low-pressure bypass valve during peak-shaving may cause fatigue damage to the valve casing.In order to ensure the safe and stable operation of the bypass heating system equipment and meet the peak-shaving needs of unit,strength analysis of the valve casing under rated operating conditions and fatigue life analysis under peak-shaving conditions is conducted,providing theoretical basis for the safe operation of the unit.
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