Provide [single] [dual] outlet connections with integral gate valves and
locate about one meter 3 feet above grade. Provide each outlet with 65 mm
2 1/2 inch male National Standard hose threads with 65 to 40 mm 2 1/2 to 1
1/2 inch reducer with cap and chain. Provide wall escutcheon plate with
"FOAM HYDRANT" in raised letters cast in plate.
2.19
ABOVEGROUND PIPING SYSTEMS
2.19.1
Pipe, Fittings, and Mechanical Couplings
NFPA 11, except steel piping shall be Schedule 40 for sizes smaller than
200 mm 8 inches, and Schedule 30 or 40 for sizes 200 mm 8 inches and
larger. All steel piping shall be zinc-coated. Pipe nipples 150 mm 6
inches long and shorter shall be Schedule 80 steel pipe. Water motor alarm
piping shall be zinc-coated steel pipe and fittings. Rubber gasketed
grooved-end pipe and fittings with mechanical couplings shall only be
permitted in pipe sizes 40 mm 1 1/2 inches and larger. Rubber gaskets
shall be UL listed for use in dry-pipe sprinkler systems. Gasketed
fittings are not permitted inside the diked area. Use of restriction
orifices, reducing flanges, and plain-end fittings with mechanical
couplings (which utilize steel gripping devices to bite into the pipe when
pressure is applied) are not permitted. Pipe and fittings in contact with
AFFF concentrate shall be [material resistant to the corrosive effects of
AFFF concentrate as approved by the manufacturer of the proportioning
system] [stainless steel]. [Fittings on concentrate lines shall be flanged
or welded only. Screwed or mechanical fittings will not be permitted.]
2.19.2
Jointing Material
FS A-A-58092, Polytetrafluoroethylene (PTFE) tape.
Pipe joint compound
(pipe dope) is not acceptable.
[2.19.3
Duplex Basket Strainers
**************************************************************************
NOTE: Include for systems with high volume flow,
and for untreated water supply.
**************************************************************************
FS WW-S-2739, Style Y (Y pattern). Provide duplex basket strainers with
removable screens having standard perforations, 3 mm 0.125 inch in diameter
in the riser beneath the deluge valves.
]2.19.4
Pipe Hangers and Supports
NFPA 11 and NFPA 13.
2.19.5
Valves
Provide valves as required by NFPA 11 and NFPA 13 and of types approved for
fire service. Gate valves shall open by counterclockwise rotation. Check
valves shall be flanged clear opening swing check type with flanged
inspection and access cover plate for sizes 100 mm 4 inches and larger.
Provide an OS&Y valve beneath each deluge valve in each riser, when more
than one valve is supplied from the same water supply pipe. Butterfly
valves are not acceptable.
SECTION 13957N
Page 33
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