The main feedwater piping (10LAB10BR001) is from 1m beyond K1 column to the economizer inlet header (10HAC10AC001). Beyond the feedwater piping, there are one electric gate valve (10LAB10AA201) and one electric throttle valve (10LAB10AA002) on the main feedwater piping, two electric gate valves (10LAB10AA202, 10LAB10AA203) and one electric control valve (10LAB10AA001) on 30%feedwater bypass piping. These valves formed feedwater control station which is located on the turbine side. There is also a vent piping (10HAN10BR501) on feedwater control station. At the terminal point B-EC-01, there is a transition piece (10LAB10AJ001) transfers the feedwater piping from size Φ508X40 to size Φ533.4X50 in boiler proper scope.
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