(5) Boiler Limit and Fuel Safety Interlocks: Safety shutdown
shall be caused by simulating interlock actuating conditions for
each boiler limit and fuel safety interlock. Safety shutdowns
shall occur in the specified manner.
(6) Combustion Controls: Demonstrate accuracy, range and
smoothness of operation of the combustion controls by varying
steam demand through the entire firing range required by the
turndown ratio specified for the burner. The control accuracy
shall be as specified.
(7) Safety Valves: High pressure limit switch shall be locked
out or otherwise made inoperative and boiler safety valves shall
be lifted by steam. Determine relieving capacity, popping
pressure, blowdown and reseating pressure by observation and
measurement in accordance with ASME BPVC SEC I. The ASME standard
symbol will be accepted only as indicating compliance with design
and material requirements of the code.
3.2.5.6
Auxiliary Equipment and Accessory Tests
Observe and test blowdown valves, stop valves, try cocks, draft fans, fuel
oil heaters, pumps, electric motors, and other accessories and appurtenant
equipment during operational and capacity tests for leakage, malfunctions,
defects, and for compliance with referenced standards.
3.2.5.7
Feedwater Equipment Tests
Perform test of the feedwater treatment equipment in two steps. Conduct one
test concurrently with the combustion tests. The Government will perform a
second test during the first period of heavy loading after the plant has
been accepted and put in service. Correct deficiencies revealed during the
Government tests under the guarantee provisions of the contract. Both the
first and second series of tests shall determine compliance with the limits
for chemical concentrations of this specification. Supply equipment for
taking samples and test kit for analyzing the samples. Sampling equipment
and test kit shall become the property of the Government when tests are
completed.
3.2.5.8
Capacity and Efficiency Tests
Perform capacity and efficiency tests after operating tests have been
satisfactorily completed and boiler has been operated continuously for at
least 14 days with no nuisance shutdowns and without the necessity for
frequent or difficult adjustments. Perform capacity and efficiency tests
on each boiler. Conduct tests using specified fuel[s]. Test procedures
shall be in accordance with the heat loss method [and the input-output
method] of ASME PTC 4.1. Before performing tests, the Contracting Officer
and the Contractor shall reach agreement on those items identified in ASME
PTC 4.1, Section 3, paragraph 3.0l "Items on Which Agreement Shall be
Reached." A test run shall not start until boiler and accessories have
reached an equilibrium and stabilization condition for at least one hour in
duration. Duration of tests shall be sufficient to record necessary data
but in no case shall each run be less than [4] [10] [24] hours.
a.
Accomplish maximum output testing by means of a single 2 hour run
at 110 percent load on the boiler under test. Calculate boiler
efficiency, both input-output and heat loss, from the consistent
SECTION 15501N
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