TranSystems Corporation - LGM Construction

501070099 Federal Express Oakland Sort Expansion Issued for Bid 10/11
O. Caulking of joints will not be permitted.
P. For leaks in welded connections, the weld shall be ground out to parent metal and rewelded.
3.2 PIPE TESTS
A. Domestic Water
Piping shall be hydrostatically tested at 125 psig for a minimum of four hours with no drop in
pressure. While the system is under pressure, visually inspect joints and connections for leaks.
Leaks shall be repaired and the system shall be retested until test requirements are met. After the
test, flush lines with potable water and clean lines of sediment and debris. Upon successful
completion and approval of the tests, Domestic Water systems shall be disinfected before
connecting permanently to the source of potable water. Disinfect lines with chlorine in accordance
with 15401, State Health Department, and water company requirements.
B. Gravity Soil and Waste
Piping (including sanitary and vents) shall be inspected over the entire length for obstructions.
Necessary openings shall be plugged and the system hydrostatically tested to the level of the
highest vent above the roof to a maximum of 20 psig. The system shall hold water for a minimum
of one hour with no drop in level. Where a portion of the system is to be tested, the test shall be
conducted in the same manner and to the pressure of the highest level above the roof as
described for the entire system. A pump may be used to supply the required pressure.
C. Natural Gas
Piping shall be pneumatically tested under 125 psig pressure for a minimum of four hours with no
drop in pressure. Components not rated for test pressure shall be disconnected during the test.
Pipe connections to these components shall be plugged or capped during the test. While the
system is under pressure, joints and connections shall be visually examined and tested with a
soap solution. Upon successful completion and approval of the test, clean lines of sediment and
debris with compressed air. Reconnect disconnected components. Test reconnected joints with a
soap solution at normal operating pressure.
D. Air Conditioning Condensate
END OF SECTION 15425
Piping shall be inspected over the entire length for obstruction. The system shall be pneumatically
tested at 50 psig for a minimum of four hours with no drop in pressure. While the system is under
pressure, joints and connections shall be tested with a soap solution. Upon successful completion
and approval of the test, clean lines of sediment and debris with compressed air.
PIPING TESTS 15425-3