3.9.6
Test for Steam Purity and Water Level Stability
Test for steam purity, in accordance with ASTM D 1066, and water level
stability shall be simultaneous under the operating conditions specified.
3.9.6.1
Conductivity Tests for Boilers without Superheaters
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NOTE: Delete the inapplicable paragraph.
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[Steam tests for boilers without superheaters, not used for power
generation or large turbine drive, shall be made on steam sampled in
accordance with ASTM D 1066, using the conductivity method in ASTM D 2186.
The conductivity of the steam corrected for carbon dioxide and ammonia
content shall not exceed 30 microhms at 18 degrees C65 degrees F.]
3.9.6.2
Conductivity Test, Boilers with or without Superheaters
The steam for boilers, with or without superheat, used for power generation
or turbine drive for air-conditioning equipment shall be sampled in
accordance with ASTM D 1066 and shall be tested in accordance with the
conductivity method in ASTM D 2186, with the conductivity of the steam
corrected for carbon dioxide and ammonia content not to exceed 4.0 microhms
at 18 degrees C65 degrees F.
3.9.6.3
Water Level Stability Test
[Water level stability test first shall be conducted by use of the manual
bypass around the feedwater regulator. Test then shall be repeated using
the automatic feedwater regulator. Boiler shall maintain specified water
level stability under both conditions.]
3.10
CLEANING OF BOILERS AND PIPING FOR TESTING
3.10.1
Boiler Cleaning
After the hydrostatic tests but before the operating tests, the boilers
shall be cleaned of foreign materials. Wherever possible, surfaces in
contact with water shall be wire-brushed to remove loose material. The
Contractor may use the following procedure or may submit his own standard
procedure for review and approval by the Contracting Officer. Boilers
shall be filled with a solution consisting of the following proportional
ingredients for every 3785 liters 1000 gallons of water and operated at
approximately 207 to 350 kPa 30 to 50 psig for a period of 24 to 48 hours,
exhausting steam to the atmosphere:
11 kg caustic soda
3.6 kg sodium nitrate
24 pounds caustic soda
8 pounds sodium nitrate
11 kg disodium phosphate, anhydrous
230 mg approved wetting
agent
24 pounds disodium phosphate, anhydrous
1/2 pound approved wetting
agent
Chemicals in the above proportions or as otherwise approved shall be
thoroughly dissolved in the water before being placed in the boilers.
After the specified boiling period, the boilers shall be allowed to cool
and then drained and thoroughly flushed. Piping shall be cleaned by
SECTION 15559A
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