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Electrode Boiler
10 - Layup
At times it is desirable to shut the boiler down for an extended period ("Layup"). The preparation
method used depends on the duration of layup and on how much time it is convenient to take in
placing the boiler back into service.
For short-term shutdown (up to one or two months) the boiler may be left on standby with the standby
heater keeping the boiler hot and under some pressure. This will keep all gaskets tight and will leave
the boiler ready for use.
If the boiler is to be shut down and allowed to cool off, the water left in the boiler should be treated
with hydrazine (100 ppm). The steam space should be filled with nitrogen to a pressure of 1 or 2 psi.
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