SECTION 21 30 00– FIRE SUPPRESSION
PART 1: GENERAL
1.01DESCRIPTION:
A.This Section covers the fire sprinkler and standpipe systems.
B.The building addition shall be protected by automatic sprinklers as defined by NFPA 13-2007.
C.Fire suppression commissioning is specified in Section 21 00 90, Commissioning. This Section includes responsibilities and obligations in support of the commissioning process specified therein.
1.02QUALITY ASSURANCE:
A.Products and components installed in the system shall be listed by Underwriters Laboratories (UL).
B.Fire suppression systems shall be installed by a company regularly engaged in the installation of sprinkler systems and which holds a current sprinkler contractor's license from the State of West Virginia. Submittals shall bear the stamp or the license number of the installing contractor.
C.Unless indicated otherwise on the Drawings, materials shall be new and free from defects.
D.Materials and equipment used for similar applications shall be the products of one manufacturer.
E.Sprinkler system fabrication shop drawings shall be prepared under the supervision of a NICET Level IIIor IV technician certified in Fire Protection Engineering Technology and Automatic Sprinkler System Layout. Submittals, drawings, and hydraulic calculations shall bear the NICET technician's certification number.
F.Minimum service pressure rating for aboveground pipe, valves, and fittings shall be 175psig unless otherwise specified herein or indicated on the Drawings.
1.03BASIS OF DESIGN:
A.Water supply data on which the fire protection design is based is shown on the Drawings.
B.Hydraulic calculations shall include a minimum safety factor of 10 psig.
C.Fabrication drawings and calculations shall show hydraulic reference points from the source to the remote design areas.
D.Sprinkler spacing shall not exceed 225 ft² for Light Hazard areas and 130ft² for Ordinary Hazard areas.
E.Contractor shall develop coordinated installation drawings and hydraulic calculations including the following:
1.Piping plans showing offsets, pipe elevations, sizes, and lengths; hangers types and locations; hydraulic calculation reference points; remote area location and water delivery density.
2.Hydraulic calculations shall be performed by a computer calculation program specifically designed for the analysis of fire sprinkler systems. Calculations shall use the area/density method described in NFPA 13-2007.
F.System design densities and remote area of sprinkler operation shall be as indicated on the Drawings.
PART 2: PRODUCTS
2.01ABOVEGROUND PIPE AND FITTINGS:
A.Steel pipe: black steel conforming to ASTM A53/A53M-2010, ASTM A135/A135M-2009, or ASTM A795/A795M-2008. Use galvanized pipe where indicated on the Drawings or specified herein. Piping 2" and smaller shall be schedule40. Wet system piping 2.5" and larger shall be schedule 10 conforming to NFPA 132007.
1.Use galvanized pipe for drains subject to alternate wetting and drying.
B.Cast iron fittings: standard weight fittings shall be UL classified for 175psig. For service pressure above 175psig, fittings shall be heavy weight, UL classified for 400psig. Fittings shall comply with ASTM A126-2004 (2009). Threaded fittings shall comply with ASME B16.4-2006. Flanged fittings shall comply with ASME B16.1-2010. Gaskets for flanged fittings shall be full-face type of red sheet rubber. Fittings on galvanized piping systems shall be galvanized.
C.Welding fittings:UL listed class150 factory-fabricated welded outlets, with foundry mark. No other type of welded outlet shall be used.For service pressure above 175psig fittings shall be class300.
D.Grooved couplings and fittings: grooved mechanical fittings and couplings using an elastomeric gasket enclosed by a split malleable or ductile iron housing. For service pressure above 175psigfittings and couplings shall be rated for a minimum working pressure of 300psig. Malleable iron shall comply with ASTM A47/A47M-1999 (2009). Ductile iron shall comply with ASTM A536-1984 (2009). Self-grooving couplings and fittings employing set screws or plain end pipe shall not be used. Segment-welded fittings shall not be used. Fittings on galvanized piping systems shall be galvanized. Grooved couplings and fittings from one manufacturer shall be used.
2.02VALVES:
A.Valve size, working pressure, and the manufacturer's name or trademark shall be permanently affixed to valve bodies. Drain, test and gauge valves are exempt from this requirement.
B.Indicating control valves shall be the OS&Y gate or indicating butterfly type.
C.Valves for service pressure up to and including 175psig:
1.Gate valves smaller than 2.5" shall be UL listed OS&Y (rising stem) design with bronze body and mountings, and threaded connections.
2.Gate valves 2.5" and larger for above ground service shall be UL listed OS&Y (rising stem) design with cast iron body, bronze mountings and flange connections. Open counterclockwise.
3.Indicating butterfly valves: UL listed, with cast iron body, bronze mountings, flange or groove connections, integral tamper switch, and handwheel operator.
4.Check valves smaller than 2.5" shall be Y-pattern clapper type with renewable seat and disc, bronze body, and threaded connections. Minimum water working pressure 200psig.
5.Check valves 2.5" and larger shall be UL listed clapper type with cast iron body and bronze mountings, rubber faced disc, flanged connections and bolted access bonnet.
6.Trim valves: gate, globe, angle, and check valves used for trim shall have bronze construction and threaded connections, with a minimum 200psig working pressure.
2.03SPRINKLER HEADS:
A.General:
1.New sprinkler heads shall be the product of one manufacturer.
2.Sprinkler heads shall have a 0.5" orifice, 0.5" threaded connection, and a glass-bulb thermal element.
B.Upright sprinklers: rough brass body. Both standard and quick response heads are used. Provide quick response type unless noted on the Drawings.
C.Pendent sprinklers:recessed, quick response type with white body and white ceiling cup.
2.04ALARM AND SUPERVISORY DEVICES:
A.Alarm switches for wet pipe systems:vane type with flexible vane, SPDT contacts, a tamperproof cast aluminum housing with red enamel finish, and a steel U-bolt. The switch shall have an instantly recycling pneumatic retard mechanism fieldadjustable from 0 s to 60s.
B.Valve tamper switches:designed for OS&Y and indicator post valves. The switch shall mount without the use of blocks and shall not interfere with valve operation. A signal shall be initiated before the valve stem moves more than 20% of its total travel or if the housing cover is removed.
C.Manufacturer: Potter Electric, or System Sensor.
2.05FIRE DEPARTMENT CONNECTION:
A.Free-standing 2.5" x 2.5" x 4" double-clapper type with threaded caps and chains. Exposed surfaces shall be polished chrome. Provide a matching polished chrome pipe sleeve. Identification shall read "AUTO SPKR". Threads shall match the local fire department standard.
2.06ACCESSORIES:
A.Hangers and supports: UL listed and as specified in Section 21 0010, General.
B.Valve tags and nameplates: as specified in Section 21 0010, General.
C.Pressure gauges: bourdon tube type with metal case,4.5" dials, accuracy within 1% of full scale range, equipped with snubbers and brass needle valves. Maximum gauge limit shall be approximately twice the normal working pressure where the gauge is installed.
D.Automatic ball drip valves:ball check type, closed when inlet is pressurized, with bronze body and threaded connections.
E.Test and drain connections:UL listed, factory-assembled unit consisting of a control valve, sight glass, and 0.5" orifice. The device shall be tapped for a pressure gauge. The drain connection shall allow unobstructed flow through the device. Working pressure shall be 300psig.
1.Manufacturer:AGF, or Victaulic.
F.Flexible sprinkler connections: UL listed, FM approved, factory-assembled units including a 1" diameter hose and braided stainless steel outer jacket with threaded adaptors at each end, a ceiling mounting bracket, and an adjustable sprinkler clamping device. Minimum working pressure shall be 175 psig.
1.Manufacturer: Flexhead, or Victaulic.
2.07UNDERGROUND PIPE, VALVES, AND FITTINGS:
A.Pipe: Class 51 cement lined ductile iron with mechanical joint ductile iron fittings and continuous tie rods.
B.Valves: UL listed non-rising stem gate valve with mechanical joint connection and indicator post.
PART 3: EXECUTION
3.01ABOVEGROUND PIPE AND FITTINGS:
A.Run pipe parallel to column centerlines. Pipe shall be installed as high as possible to maintain maximum head room. Provide auxiliary drains to drain the piping system.
B.Use galvanized piping and fittings for ball drip discharges and drains subject to alternate wetting and drying.
C.Fittings and joints shall be assembled using threaded, flanged, or grooved connections. No welded joints or weld formations, either shop- or field-fabricated, shall be used except as specified herein.
D.Threads cut into galvanized pipe shall be painted with zinc-rich paint.
E.Threads on fittings and bolts shall be fully engaged. Threads shall be made up using joint compound or Teflon tape.
F.Drains and discharges from relief valves, ball drips, drip rims and test connections shall be piped to spill at grade outside the building.
G.Provide inspector's test connection for each water flow switch in the system.
H.Torch cutting is not permitted as a means of modifying sprinkler or standpipe systems.
3.02VALVES:
A.Gate valves shall be installed with the stems pointing above the pipe centerline.
3.03SPRINKLER HEADS:
A.Install sprinkler guards on sprinklers located lower than 7' above the floor, and on sprinklers located in electrical rooms, telecommunications rooms, elevator equipment rooms,mechanical rooms, and hoistways.
B.Refer to Architectural Reflected Ceiling Plans for accurate head locations. Sprinkler heads shall be aligned on the ceiling and centered in the ceiling tiles. Head escutcheon plates shall be set tight against the ceiling.
C.Locate sprinkler heads under exposed ductwork over 48" wide.
3.04ALARM AND SUPERVISORY DEVICES:
A.The retard mechanism of vane type flow switches shall be adjusted to 30 s.
B.Valves shall be monitored in the open position unless indicated normally closed on the Drawings.
3.05ACCESSORIES:
A.Hangers and Supports:
1.The installation and spacing of hangers for sprinklers shall conform to NFPA13-2007.
B.Hydraulic identification nameplates: provide nameplates for each sprinkler system recording data required by NFPA 13-2007.
3.06TESTS:
A.Prior to being concealed by walls or ceilings, each portion of the interior piping shall be hydrostatically tested for 2 hours at 200 psig measured at the bottom of the system. Leaks shall be repaired until the system test pressure is maintained for 2 hours. Hydrostatic tests shall be made after drop nipples have been cut back and sprinkler heads have been installed. Submit a Contractor's Material and Test Certificate for Aboveground Piping in accordance with NFPA 13-2007.
END OF SECTION 21 30 00
ETB #091421 30 00 - 1North Central AdvancedTechnology Center
WV-CTCS