substitution request - Alliance Construction Solutions

1. Use ambient temperature water as the testing medium, except where there is a risk
of damage due to freezing. Another liquid may be used if it is safe for workmen
and compatible with the piping system components.
2. Use vents, installed at high points in the direction of flow, in the system to release
trapped air while filling the system. Use drains installed at low points for complete
removal of the liquid.
3. Examine system to see that equipment and parts that cannot withstand test
pressures are properly isolated. Examine test equipment to ensure that it is tight
and that low-pressure filling lines are disconnected.
4. Subject piping system to a hydrostatic test pressure which at every point in the
system is not less than 1.5 times the design pressure. The test pressure shall not
exceed the maximum pressure rating for any vessel, pump, valve, or other
component in the system under test. Make a check to verify that the stress due to
pressure at the bottom of vertical runs does not exceed either 90 percent of
specified minimum yield strength, or 1.7 times the “SE” value in Appendix A of
ASME B31.9, Code For Pressure Piping, Building Services Piping.
5. After the hydrostatic test pressure has been applied for at least four hours,
examine piping, joints, and connections for leakage. Eliminate leaks by
tightening, repairing, or replacing components as appropriate, and repeat
hydrostatic test until there are no leaks.
6. “Stop-Leak” compounds shall not be added to the system at any time.
3.09 ADJUSTING AND CLEANING:
A. General: Clean exterior surfaces of installed piping systems of superfluous materials, and
prepare for application of specified coatings (if any). Flush out piping systems with clean
water before proceeding with required tests. Inspect each run of each system for
completion of joints, supports and accessory items.
1. Inspect pressure piping in accordance with procedures of ASME B31.
B. Disinfect all potable water mains and water service piping in accordance with local health
department requirements. Submit test results report.
C. Mark calibrated nameplates of pump discharge valves after hydronic system balancing
has been completed, to permanently indicate final balanced position.
3.10 STERILIZATION:
A. Each unit of domestic water supply and distribution system shall be sterilized with liquid
chlorine or hypochlorite before acceptance for operation, in accordance with American
Water Works Association G601 “Standard for Disinfecting Water Mains.” Work shall be
done by contractor, and, unless otherwise required by legally constituted authorities having
jurisdiction, sterilization shall conform to the following:
B. Materials:
1. Liquid Chlorine: U.S. Army Specification No. 4-1.
2. Hypochlorite: Liquid shall conform to FS 0-C-114a, and Int. Amendment 3,
Grade D.
3. Method: Amount of chlorine used shall provide a concentration of not less than
50 parts per million.
Project No.: 10145
550 15 th Street Dual Brand Hotel
12/23/2011
22 1116 - 17 BASIC PLUMBING PIPING