CHAPTER2
abies preclude definite recommendations.
How·
ever, it
is
suggested that the pressure vessel
be
drafoed, thoroughly cleaned internally, and re-
filled to
overflowing
with treated water.
If
deaerated water is not available, the unit should
be
fired to boil the water for a short period
of
time. Additional chemicals may
be
suggested by
750-150
THE
PRESSURE VESSEL
your Cleaver-Brooks local representative
to
min~
imize corrosion. Internal water pressure should
be
maintained at greater than atmospheric pres.
sure. Nitrogen often
is
used
to
pressurize the
vessel. Fireside surfaces must
be
thoroughly
cleaned
and the refractory
should
be
wash
coated.
CHAPTER 2-15
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