3.10.2
Aboveground Piping
3.10.2.1
Hydrostatic Testing
Aboveground piping shall be hydrostatically tested in accordance with NFPA
13 at not less than 1400 kPa 200 psi or 350 kPa 50 psi in excess of maximum
system operating pressure and shall maintain that pressure without loss for
2 hours. There shall be no drop in gauge pressure or visible leakage when
the system is subjected to the hydrostatic test. The test pressure shall
be read from a gauge located at the low elevation point of the system or
portion being tested.
3.10.2.2
Backflow Prevention Assembly Forward Flow Test
Each backflow prevention assembly shall be tested at system flow demand,
including all applicable hose streams, as specified in NFPA 13. The
Contractor shall provide all equipment and instruments necessary to conduct
a complete forward flow test, including65 mm 2.5 inch diameter hoses,
playpipe nozzles, calibrated pressure gauges, and pitot tube gauge. The
Contractor shall provide all necessary supports to safely secure hoses and
nozzles during the test. At the system demand flow, the pressure readings
and pressure drop (friction) across the assembly shall be recorded. A
metal placard shall be provided on the backflow prevention assembly that
lists the pressure readings both upstream and downstream of the assembly,
total pressure drop, and the system test flow rate. The pressure drop
shall be compared to the manufacturer's data.
3.10.3
Testing of Alarm Devices
Each alarm switch shall be tested by flowing water through the inspector's
test connection. Each water-operated alarm devices shall be tested to
verify proper operation.
3.10.4
Main Drain Flow Test
Following flushing of the underground piping, a main drain test shall be
made to verify the adequacy of the water supply. Static and residual
pressures shall be recorded on the certificate specified in paragraph
SUBMITTALS. In addition, a main drain test shall be conducted each time
after a main control valve is shut and opened.
3.11
FINAL ACCEPTANCE TEST
Final Acceptance Test shall begin only when the Preliminary Test Report has
been approved. The Fire Protection Specialist shall conduct the Final
Acceptance Test and shall provide a complete demonstration of the operation
of the system. This shall include operation of control valves and flowing
of inspector's test connections to verify operation of associated waterflow
alarm switches. After operation of control valves has been completed, the
main drain test shall be repeated to assure that control valves are in the
open position. In addition, the representative shall have available copies
of as-built drawings and certificates of tests previously conducted. The
installation shall not be considered accepted until identified
discrepancies have been corrected and test documentation is properly
completed and received. The Contractor shall submit the Final Acceptance
Test Report as specified in the Submittals paragraph.
SECTION 13930A
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