aspirating] type. Provide normally closed quarter-turn ball valve in
supply line at each hose station. Nozzle flow rate shall be [228 L/m] [60
gpm] [_____] minimum.
2.19
WALL FOAM HYDRANTS
**************************************************************************
NOTE: Provide wall foam hydrants for testing of
proportioners on pre-action systems or where
additional foam hand hose lines are required.
Determine number of outlet connections based upon a
ratio of one outlet for each 948 L/m 250 gpm of
design flow, up to a maximum of 8 outlets.
**************************************************************************
Provide [dual] [triple] [_____] 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 cap and
chain. Hydrant shall be controlled by 0S&Y gate valve located inside foam
room. Provide wall escutcheon plate with "FOAM HYDRANT" in raised letters
cast in plate. [Hydrant shall permit testing of each pre-action system
riser at full design flow without charging the system supplied by the
riser.]
2.20
ABOVEGROUND PIPING SYSTEMS
2.20.1
Pipe, Fittings, and Mechanical Couplings
NFPA 13, 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. 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. 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.]
2.20.2
Jointing Material
FS A-A-58092, Polytetrafluoroethylene (PTFE) tape.
Pipe joint compound
(pipe dope) is not acceptable.
[2.20.3
Duplex Basket Strainers
**************************************************************************
NOTE: Include for deluge 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.
SECTION 13956N
Page 33
Previous Page
