Clayton Feedwater Treatment Manual

4.2.3 Dry Shutdown The key to a successful dry shutdown is to keep the coil completely dry at all times; a com- pletely dry coil prevents coil corrosion during the lay-up period. Once the dry shutdown is properly executed, the goal is to keep the coil tightly sealed to prevent any moisture from entering. It is important that all feedwater inlet valves, feedwater and steam discharge valves, coil and separator blowdown valves, and any other valve where the moisture can enter be closed.

NOTE If a dry shutdown is intended to exceed 30 days, then a positive-pressure nitrogen blanket is preferred.

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OperatingInstr_b.fm

04/12/2013