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.
]2.20.4
Pipe Hangers and Supports
NFPA 13.
2.20.5
Valves
Provide valves as required by 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 [pre-action] [deluge] valve in each
riser, when more than one valve is supplied from the same water supply
pipe. Butterfly valves are not acceptable.
2.20.6
Identification Signs
Attach properly lettered approved metal signs conforming to NFPA 13 to each
valve and alarm device. Permanently affix design data nameplates to the
riser of each system.
[2.20.7
Inspector's Test Connection
**************************************************************************
NOTE: Include for pre-action and dry-pipe systems.
**************************************************************************
Provide test connections about 2 meters 6 feet above the floor for each
sprinkler system and locate at the hydraulically most remote part of each
system. Provide test connection piping to a location where the discharge
will be readily visible and where water may be discharged without damage.
]2.20.8
Main Drains
Provide drain piping to discharge at safe points outside each building or
to sight cones attached to drains of adequate size to readily receive the
full flow from each drain under maximum pressure. Provide auxiliary drains
as required by NFPA 13.
2.20.9
Pipe Sleeves
Provide where piping passes through walls, floors, roofs, and partitions.
Secure sleeves in proper position and location during construction. Provide
sleeves of sufficient length to pass through entire thickness of walls,
floors, roofs, and partitions. Provide not less than 6 1/2 mm 1/4 inch
space between exterior of piping and interior of sleeve. Firmly pack space
with insulation and calk at both ends of the sleeve with plastic waterproof
cement.
2.20.9.1
Sleeves in Masonry and Concrete Walls, Floors, Roofs
ASTM A 53, schedule 40 or standard weight, zinc-coated steel pipe sleeves.
Extend sleeves in floor slabs 80 mm 3 inches above the finished floor.
SECTION 13958N
Page 35
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