2.5.4.1
Bolts
Bolts shall be [squarehead conforming to ASME B18.2.1] [ASTM A 449, Type
[1] [2]]. Bolts shall extend no less than three full threads beyond the
nut with bolts tightened to the required torque.
2.5.4.2
Nuts
Nuts shall be [hexagon type conforming to ASME B18.2.2] [ASTM A 193/A 193M,
Grade 5] [ASTM A 563M ASTM A 563, Grade [C3] [DH3]].
2.5.4.3
Washers
Washers shall meet the requirements of ASTM F 436M ASTM F 436. Flat
circular washers shall be provided under all bolt heads and nuts.
2.5.5
Pipe Hangers
Hangers shall be listed in UL Fire Prot Dir or FM P7825a and FM P7825b and
of the type suitable for the application, construction, and pipe type and
size to be supported.
2.5.6
Valves
2.5.6.1
Control Valve and Gate Valve
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NOTE: A control valve is required for control of
each individual sprinkler riser. The type of such
valves should be either the OS&Y or wall type
indicator post. Where multiple risers are supplied
from a single water service, riser control valves of
the OS&Y type should be located in a valve room with
exterior access. For more guidance on arrangement
of sprinkler control valves, refer to NFPA 13,
Appendix A
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Manually operated sprinkler control valve and gate valve shall be outside
stem and yoke (OS&Y) type and shall be listed in UL Bld Mat Dir or FM P7825a
and FM P7825b.
2.5.6.2
Check Valves
Check valve 50 mm 2 inches and larger shall be listed in UL Bld Mat Dir or
FM P7825a and FM P7825b. Check valves 100 mm 4 inches and larger shall be
of the swing type with flanged cast iron body and flanged inspection plate,
shall have a clear waterway and shall meet the requirements of MSS SP-71,
for Type 3 or 4.
2.6
AUTOMATIC WATER CONTROL VALVE (DELUGE VALVE)
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NOTE: "Automatic water control valve" is a generic
term synonymous with "deluge valve" and is used for
both preaction and deluge systems. "Automatic water
control valve" is consistent with what is used in
the UL Fire Protection Equipment Directory. Delete
reset capability when not required.
SECTION 13945A
Page 20
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