PART 3
EXECUTION
3.1
PIPE INSTALLATION
Cut screw-jointed pipe accurately and work into place without springing or
forcing. Ream pipe ends and free pipe and fittings from burrs. Clean with
solvent to remove all varnish and cutting oil prior to assembly. Make
screw joints with tetrafluoroethylene tape applied to male thread only.
3.2
FIELD PAINTING
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NOTE: Coordinate Section 09900, "Paints and
Coatings" with this paragraph.
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Clean, pretreat, prime, and finish paint new Halon 1301 fire extinguishing
systems, including piping, conduit, hangers and miscellaneous metalwork.
Apply coatings only to clean, dry, surfaces using clean brushes. Clean
surfaces to remove all dust, dirt, rust and loose mill scale. Immediately
after cleaning, the metal surfaces shall receive one coat of primer
conforming to FS TT-P-645 applied to a minimum dry film thickness of 0.025
mm one mil. Exercise due care to avoid the painting of operating devices.
Materials which are used to protect devices, while painting is in process,
shall be removed upon the completion of painting. Remove all devices which
are painted and provide new clean devices of the proper type in lieu
thereof.
3.2.1
Systems in Unfinished Areas
Unfinished areas are defined as attic spaces, spaces above suspended
ceilings, spaces under raised floors, crawl spaces, pipe chases, and spaces
where walls or ceiling are not painted or not constructed of a prefinished
material. Primed surfaces shall receive one coat of red enamel conforming
to FS TT-E-489 applied to a minimum dry film thickness of 0.025 mm one mil
and color coded in accordance with MIL-STD-101.
3.2.2
Systems in All Other Areas
Primed surfaces shall receive two coats of paint to match adjacent
surfaces, except stop valves and accessories shall receive one coat of red
enamel conforming to FS TT-E-489 applied to a minimum dry film thickness of
0.025 mm one mil. Provide piping with 50 mm 2 inch wide red bands spaced
at maximum of 6 meters 20 feet intervals throughout the piping systems,
except in finished areas such as offices, the red bands may be deleted.
Red bands shall be red enamel or self adhering red plastic tape and color
coded in accordance with MIL-STD-101.
3.3
FIELD TESTING
Perform tests in the presence of the Contracting Officer to determine
conformance with the specified requirements.
3.3.1
Preliminary Tests
Each piping system shall be pneumatically tested at 1034
kPa (gage) 150 psig
and shall show no leakage or reduction in gage pressure
after 30 minutes.
The contractor shall conduct complete preliminary tests,
which shall
encompass all aspects of system operation. Individually
test all
SECTION 13966N
Page 21
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