conductivity of the steam corrected for carbon dioxide and ammonia content
not to exceed 4.0 microsiemens 4.0 micromhos at 18 degrees C 65 degrees F.
3.2.3
Retesting
If any deficiencies are revealed during test, such deficiencies shall be
corrected and the tests reconducted at no additional costs to the
Government.
3.3
FIELD TRAINING
A field training course shall be provided for designated operating staff
members. Training shall be provided for a total of [_____] hours of normal
working time and shall start after the system is functionally complete, but
prior to final acceptance tests. Field training shall cover all of the
items contained in the approved operation and maintenance instructions.
3.4
CLEANING OF BOILERS AND PIPING
3.4.1
Boiler Cleaning
After the hydrostatic tests have been made and before starting the
operating tests, the boiler shall be thoroughly and effectively cleaned of
foreign materials, including mill scale, grease, and oil deposits. The
Contractor may use the following described procedure or may submit his own
standard procedure for review and approval by the Contracting Officer.
Wherever possible, surfaces in contact with water shall be wire-brushed to
remove loose material before filling the boiler with a solution containing:
a.
11 kg caustic soda
b.
4 kg sodium nitrate
c.
11 kg disodium phosphate, anhydrous
d.
230 g approved wetting agent, 3,785 liters water
a.
24 pounds caustic soda
b.
8 pounds sodium nitrate
c.
24 pounds disodium phosphate, anhydrous
d.
1/2 pound approved wetting agent, 1,000 gallons water
Chemicals shall be thoroughly dissolved in the water before being placed in
the boilers. The boiler shall then be operated at 210 to 345 kPa 30 to 50
psig and minimum rating for 24 to 48 hours, exhausting the steam to
atmosphere. After the boiling period, the boiler shall be allowed to cool
before being drained and thoroughly flushed out. Piping shall be cleaned
by operating the boilers for a period of approximately 48 hours, wasting
the condensate.
3.4.2
Boiler Water Conditioning
The Contractor shall provide chemical treatment and blowdown of boiler
water during periods of boiler operation to prevent scale and corrosion in
boilers and in steam and return distribution systems from initial startup
of the system, through the testing period, and to final acceptance by the
SECTION 15845A
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