substitution request - Alliance Construction Solutions

deburred and cleaned. Pipe ends shall be marked at the required location to ensure full
insertion into the coupling or fitting during assembly. Use a Victaulic "PFT" series tool with
the proper sized jaw for pressing.
3.04 GROOVED PIPING SYSTEMS:
A. All changes in direction shall be made with radius type elbows.
1. Use long radius (R=1.5D) fittings wherever possible.
2. Angles less than 22-1/2° may be made with pre-manufactured mitered fittings.
3. Use of the angular deflection capabilities of grooved pipe couplings for intentional
changes of direction shall not be allowed.
B. All changes in pipe size shall be made with reducing fittings, not bushings or reducing
couplings.
C. All branch outlets shall be made with Victaulic Style 920/920N Mechanical-T® bolted
branch outlets for branches more than four pipe sizes smaller than the main, or Victaulic
No. 25 or W25 grooved end reducing tees.
D. Pipe shall be adequately laterally supported to prevent "pipe squirm." Provide a minimum
of one hanger per pipe section. No pipe section shall be left unsupported between any
two couplings.
E. Risers more than 8’ high shall be made with rigid type couplings.
F. Rigid style couplings shall be used in mechanical rooms, except where flexible style
couplings are specifically allowed for thermal expansion compensation and/or vibration
isolation, and to accommodate seismic movement.
G. Flanges shall be standard welded slip-on or weld neck with a spool piece to a grooved
end joint. "Flange adapters" are not allowed.
H. Grooved pipe systems shall not be considered to be electrically conductive.
1. Provide wire jumpers across all couplings where the piping system is required to
be electrically conductive.
I. Flexible couplings may be used for vibration elimination.
1. Follow manufacturer’s recommendations.
2. Provide 3 degrees of freedom by installing sufficient flexible couplings in different
orientations.
3. Use spring hangers for all sections of pipe intended for deflection.
4. Roll-grooved fittings and pipe shall be considered to have 1/2 the deflection of
cut-grooved fittings and pipe.
J. Victaulic Style 177, 77 or W77 flexible couplings may be used in lieu of flexible connectors
for vibration isolation at equipment connections. Three (3) couplings, for each connector,
shall be placed in close proximity to the source of vibration.
K. Grooved joint piping systems shall be installed in accordance with the manufacturer's
guidelines and recommendations. All grooved couplings, fittings, valves, and specialties
Project No.: 10145
550 15th Street Dual Brand Hotel
03/16/2012
23 2113 - 14 HYDRONIC PIPING