21 13 18.00 10_Add03.pdf

TRUAX FIELD ANGB - F-35: ALTER BLDG 406 Addendum 3

XGFG182008 08 MAR 2021

SECTION 21 13 18.00 10

PREACTION SPRINKLER SYSTEMS, FIRE PROTECTION

0/09

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to within the text by the basic designation only.

ASME INTERNATIONAL (ASME)

ASME B16.1 (2015) Gray Iron Pipe Flanges and Flanged Fittings Classes 25, 125, and 250

ASME B16.3 (2016) Malleable Iron Threaded Fittings, Classes 150 and 300

ASME B16.4 (2014) Standard for Gray Iron Threaded Fittings; Classes 125 and 250

ASME B16.9 (2018) Factory-Made Wrought Buttwelding Fittings

ASME B16.11 (2016) Forged Fittings, Socket-Welding and Threaded

ASME B16.21 (2016) Nonmetallic Flat Gaskets for Pipe Flanges

ASME B18.2.2 (2015) Nuts for General Applications:

Machine Screw Nuts, Hex, Square, Hex Flange, and Coupling Nuts (Inch Series)

ASTM INTERNATIONAL (ASTM)

ASTM A47/A47M (1999; R 2018; E 2018) Standard Specification for Ferritic Malleable Iron Castings

ASTM A53/A53M (2018) Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

ASTM A135/A135M (2009; R2014) Standard Specification for Electric-Resistance-Welded Steel Pipe

ASTM A183 (2014) Standard Specification for Carbon Steel Track Bolts and Nuts

ASTM A193/A193M (2017) Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service and Other Special Purpose Applications

SECTION 21 13 18.00 10 Page 1

ASTM A449 (2014) Standard Specification for Hex Cap Screws, Bolts, and Studs, Steel, Heat Treated, 120/105/90 ksi Minimum Tensile Strength, General Use

ASTM A536 (1984; R 2014) Standard Specification for Ductile Iron Castings

ASTM A563 (2015) Standard Specification for Carbon and Alloy Steel Nuts

ASTM A795/A795M (2013) Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use

ASTM F436 (2011) Hardened Steel Washers

FM GLOBAL (FM)

FM APP GUIDE (updated on-line) Approval Guide http://www.approvalguide.com/

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE C62.41.1 (2002; R 2008) Guide on the Surges Environment in Low-Voltage (1000 V and Less) AC Power Circuits

IEEE C62.41.2 (2002) Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power Circuits

MANUFACTURERS STANDARDIZATION SOCIETY OF THE VALVE AND FITTINGS

INDUSTRY (MSS)

MSS SP-71 (2018) Gray Iron Swing Check Valves, Flanged and Threaded Ends

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 13 (2019) Standard for the Installation of Sprinkler Systems

NFPA 24 (2019) Standard for the Installation of Private Fire Service Mains and Their Appurtenances

NFPA 70 (2020) National Electrical Code

NFPA 72 (2019; TIA 19-1; ERTA 2019) National Fire Alarm and Signaling Code

U.S. DEPARTMENT OF DEFENSE (DOD)

UFC 3-600-01 (2016; with Change 3 8 August 2019) Fire Protection Engineering For Facilities

SECTION 21 13 18.00 10 Page 2

ANGETL 15-01-03 (2015; 1 May) Fire Protection Design Guidance

UNDERWRITERS LABORATORIES (UL)

UL 508A (2018; Reprint Jul 2018) UL Standard for Safety Industrial Control Panels

UL Bld Mat Dir (updated continuously online) Building Materials Directory

UL Fire Prot Dir (2012) Fire Protection Equipment Directory

1.2 SYSTEM DESCRIPTION

a. Furnish piping offsets, fittings, and any other accessories as required to provide a complete installation and to eliminate interference with other construction. Install sprinkler over and under ducts, piping and platforms when such equipment can negatively affect or disrupt the sprinkler discharge pattern and coverage. All fire protection shall be rated for 250 psi. A reduction of equipment pressure rating to 175 psi shall be permitted if system pressures does not exceed 175 psi.

b. Provide preaction sprinkler system(s) in areas indicated on the drawings.

The sprinkler system shall provide fire sprinkler protection for the entire area. Except as modified herein, the system shall meet the requirements of NFPA 13, NFPA 72, UFC 3-600-01 and ANGETL 15-01-03.

The sprinkler system shall be a single interlock system that requires the actuation of two (2) rate of rise heat detectors to open the water control valve. Provide a single interlock, externally resettable preaction automatic water control valve.

Provide valve with resettable capability that does not require opening the valve or use of special tools.

c. Design any portions of the sprinkler system that are not indicated on the drawings or are not specified herein, including locating sprinklers, piping, and equipment, and size piping and equipment.

Determine pipe sizes which are not indicated on the drawings by hydraulic calculations.

d. The contractor shall be responsible for assessing corrosion in the existing preaction piping in the hangar bay. The contractor shall submit pipe samples to a certifed testing labratory to conduct a pipe sample analysis. The evaluation and analysis shall investigate both cause of the metal loss and useful remaining service life data.

Inspection of the sample identifies the type of corrosion, remaining pipe wall thickness and pit depths, and determines the most likely chemical composition of any deposits found in the pipe sample. Analysis results shall be accompanied by a report providing the most likely cause of corrosion and/or failures, customized remediation and prevention recommendations, and pictures of the sample. The report shall be submitted to the fire protection designer of record and the contracting officer.

1.2.1 Hydraulic Design

Hydraulically design the system to discharge a minimum density of 0.2 gpm/square foot over the hydraulically most demanding 5000 square feet of floor area. The minimum pipe size for branch lines in gridded systems

SECTION 21 13 18.00 10 Page 3

788KSF

Highlight shall be 1-1/4 inch. Hydraulic calculations shall be in accordance with the Area/Density Method of NFPA 13. A minimum safety factor of 10 psi shall be provided. Water velocity in the piping shall not exceed 20 ft/s.

1.2.1.1 Hose Demand

Add an allowance for exterior hose streams of 500 gpm to the sprinkler system demand at the point of connection to the existing water system.

1.2.1.2 Basis for Calculations

Base hydraulic calculations upon the Hazen-Williams formula with a "C" value of 120 for black steel piping, 100 for existing underground piping, and 140 for new cement-lined ductile-iron piping. Hydraulic calculations shall be based on operation of the fire pump(s) provided in Section 21 30 00 FIRE PUMPS. Inlcude a 12 psi loss through the reduced pressure backflow preventer

a. Outline hydraulic calculations as in NFPA 13, except that calculations shall be performed by computer using software intended specifically for fire protection system design using the design data shown on the drawings. Submit hydraulic calculations, including a drawing showing hydraulic reference points and pipe segments. Software that uses k-factors for typical branch lines is not acceptable. Calculations shall substantiate that the design area used in the calculations is the most demanding hydraulically.

b. Plot water supply curves and system requirements on semi-logarithmic graph paper so as to present a summary of the complete hydraulic calculation. Provide a summary sheet listing sprinklers in the design area and their respective hydraulic reference points, elevations, actual discharge pressures and actual flows. Indicate elevations of hydraulic reference points (nodes). Documentation shall identify each pipe individually and the nodes connected thereto. Indicate for each pipe the diameter, length, flow, velocity, friction loss, number and type fittings, total friction loss in the pipe, equivalent pipe length and Hazen-Williams coefficient.

c. For gridded systems, calculations shall show peaking of demand area friction loss to verify that the hydraulically most demanding area is being used. Also for gridded systems, include a flow diagram indicating the quantity and direction of flows. A drawing showing hydraulic reference points (nodes) and pipe designations used in the calculations shall be included and shall be independent of shop drawings.

1.2.2 Sprinkler Coverage

Uniformly space sprinklers on branch lines. In buildings protected by automatic sprinklers, provide coverage throughout 100 percent of the building. This includes, but is not limited to, telephone rooms, electrical equipment rooms, boiler rooms, switchgear rooms, transformer rooms, and other electrical and mechanical spaces. Coverage per sprinkler shall be in accordance with NFPA 13, but shall not exceed 100 square feet for extra hazard occupancies, 130 square feet for ordinary hazard occupancies, and 225 square feet for light hazard occupancies.

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1.2.3 Control System

The control system shall meet the requirements of NFPA 72. The control panel shall be listed in UL Fire Prot Dir or FM APP GUIDE for "Releasing Device Service". The control panel and the solenoid valve that activates the water control valves shall be compatible with each other.

Compatibility shall be in accordance with specific UL listing or FM approval of the control equipment.

1.2.3.1 Power Supply

Provide the primary operating power from two single-phase 120 VAC circuits. Transfer from normal to backup power and restoration from backup to normal power shall be fully automatic and shall not initiate a false alarm. Loss of primary power shall not prevent actuation of the respective automatic water control valve upon activation of any alarm initiating device. Provide backup power through use of rechargeable, sealed, lead calcium storage batteries.

1.2.3.2 Circuit Requirements

Connect alarm initiating devices to Class A signal line circuits (SLC) in accordance with NFPA 72. Provide a separate circuit for actuation of each individual automatic water control valve. Fully supervise the circuits that actuate the water control valves so that the occurrence of a single open or a single ground fault condition in the interconnecting conductors will be indicated at the control panel.

1.2.4 System Operational Features

Include in the system a heat detection system, manual actuation stations, supervisory and alarm switches, alarm notification appliances, control panel and associated equipment. Provide preaction sprinkler system piping with supervisory air pressure not to exceed 30 psig.

1.2.4.1 System Actuation

Activation of any 2 cross-zoned heat detectors or a single manual actuation station shall actuate alarm zone circuits of the control panel that, in turn, shall actuate the corresponding automatic water control valve.

Actuation of the automatic water control valve shall cause water to fill the preaction system piping and be discharged from fused sprinklers.

1.2.4.2 Alarm Functions

Activation of any heat detector or sprinkler pressure alarm switch or manual actuation station shall cause the illumination of the respective zone annunciator, and activation of the building fire alarm system. Valve tamper alarm shall be monitored by the system control panel and transmitted to the building fire alarm system as a trouble alarm.

1.2.4.3 Supervisory Functions

The reduction of supervisory air pressure within the sprinkler system piping to less than 10 psi or the occurrence of a single open or a single ground fault in any alarm initiating device circuit, in the automatic water control valve actuation circuit, in any alarm indicating appliance circuit or in other electrically supervised circuit shall cause the individually labelled control panel trouble light to be illuminated, the audible trouble

SECTION 21 13 18.00 10 Page 5 alarm to be activated, and a trouble alarm to be transmitted to the building fire alarm control panel and to base-wide fire reporting system.

1.3 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for Contractor Quality Control approval. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government.

Submittals with an "S" are for inclusion in the Sustainability eNotebook, in conformance to Section 01 33 29 SUSTAINABILITY REPORTING. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SD-02 Shop Drawings

Shop Drawings; G

As-Built Drawings

SD-03 Product Data

Fire Protection Specialist; G

Installer Qualifications;G

List of Submittals

Materials and Equipment; G

Spare Parts

OnSite Training; G

SD-05 Design Data

Hydraulic Calculations; G

SD-06 Test Reports

Preliminary Tests; G

Final Acceptance Tests;G

Preaction piping corrosion inspection report;G

SD-07 Certificates

Inspection by Fire Protection Specialist; G

SD-10 Operation and Maintenance Data

Operating and Maintenance Instructions; G

1.4 QUALITY ASSURANCE

Compliance with referenced NFPA standards is mandatory. Applicable material and installation standards referenced in Appendix A of NFPA 13 and NFPA 24 shall be considered mandatory the same as if such referenced standards were specifically listed in this specification. In the event of

SECTION 21 13 18.00 10 Page 6 a conflict between specific provisions of this specification and applicable NFPA standards, this specification governs. Incorporate all requirements that exceed the minimum requirements of NFPA 13 into the design. Interpret reference to "authority having jurisdiction" to mean the Contracting Officer.

1.4.1 Fire Protection Specialist

Perform the work specified in this section under the supervision of and certified by the Fire Protection Specialist (FPS) who is a registered professional engineer who has passed the fire protection engineering writted examination adminsitered by the National Council of Examiners for Engineering and Surveying (NCEES). Submit the name and documentation of certification of the proposed FPS, no later than 14 days after the Notice to Proceed and prior to the submittal of the sprinkler system shop drawings and hydraulic calculations. The FPS shall prepare and submit a list of submittals, related to fire protection, from the Contract Submittal Register that relate to the successful installation of the sprinkler systems(s), no later than 7 days after the approval of the FPS. The submittals identified on this list shall be accompanied by a letter of approval signed and dated by the FPS when submitted to the Government. The FPS shall be regularly engaged in the design and installation of the type and complexity of system specified in the Contract documents, and shall have served in a similar capacity for at least three systems that have performed in the manner intended for a period of not less than 6 months.

1.4.2 Installer Qualifications

Work specified in this section shall be performed by the Sprinkler System Installer. Submit the name and documentation of certification of the proposed Sprinkler System Installer, concurrent with submittal of the FPS Qualifications. The Installer shall be regularly engaged in the installation of the type and complexity of system specified in the Contract documents, and shall have served in a similar capacity for at least three systems that have performed in the manner intended for a period of not less than 6 months.

1.4.3 Shop Drawings

Submit 3 copies of the Sprinkler System Drawings, on reproducible full-size mylar film, no later than 21 days prior to the start of sprinkler system installation. The drawings shall conform to the requirements established for working plans as prescribed in NFPA 13. Drawings and calculations must be prepared by NICET III individual. Drawings shall include plan and elevation views demonstrating that the equipment will fit the allotted spaces with clearance for installation and maintenance. Update the Shop Drawings to reflect as-built conditions after all related work is completed. Each set of drawings shall include the following:

a. Descriptive index of drawings in the submittal with drawings listed in sequence by drawing number. A legend identifying device symbols, nomenclature, and conventions used.

b. Floor plans drawn to a scale not less than 1/8" = 1'-0" which clearly show locations of sprinklers, risers, pipe hangers, seismic separation assemblies, sway bracing, inspector's test connections, drains, and other applicable details necessary to clearly describe the proposed arrangement. Indicate each type of fitting used and the locations of bushings, reducing couplings, and welded joints.

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c. Actual center-to-center dimensions between sprinklers on branch lines and between branch lines; from end sprinklers to adjacent walls; from walls to branch lines; from sprinkler feed mains, cross-mains and branch lines to finished floor and roof or ceiling. A detail shall show the dimension from the sprinkler and sprinkler deflector to the ceiling in finished areas.

d. Longitudinal and transverse building sections showing typical branch line and cross-main pipe routing as well as elevation of each typical sprinkler above finished floor.

e. Details of each type of riser assembly; pipe hanger; sway bracing for earthquake protection, and restraint of underground water main at point-of-entry into the building, and electrical devices and interconnecting wiring.

f. Complete point-to-point wiring diagram of the detection and control system. Indicate the detailed interconnection of control panel modules to the devices, the number and size of conductors in each conduit, and size of conduit. Connection points shall be indicated and coordinated with the terminal identification marked on the devices. Provide complete internal wiring schematic of the control panel and each electrical device. Detailed description of the functions of the control panel and each module shall be provided.

1.5 DELIVERY, STORAGE, AND HANDLING

All equipment delivered and placed in storage shall be housed in a manner to preclude any damage from the weather, humidity and temperature variations, dirt and dust, or other contaminants. Additionally, all pipes shall either be capped or plugged until installed.

1.6 EXTRA MATERIALS

Submit spare parts data for each different item of material and equipment specified. The data shall include a complete list of parts and supplies, with current unit prices and source of supply, and a list of parts recommended by the manufacturer to be replaced after 1 year and 3 years of service. Include alist of special tools and test equipment required for maintenance and testing of the products supplied.

PART 2 PRODUCTS

2.1 STANDARD PRODUCTS

Provide materials and equipment which are standard products of a manufacturer regularly engaged in the manufacture of such products and that essentially duplicate items that have been in satisfactory use for at least 2 years prior to bid opening. Submit manufacturer's catalog data included with the Sprinkler System Drawings for all items specified herein.

Highlight the data to show model, size, options, etc., that are intended for consideration. Data shall be adequate to demonstrate compliance with all contract requirements. In addition, provide a complete equipment list that includes equipment description, model number and quantity.

2.2 NAMEPLATES

All equipment shall have a nameplate that identifies the manufacturer's

SECTION 21 13 18.00 10 Page 8 name, address, type or style, model or serial number, and catalog number.

2.3 REQUIREMENTS FOR FIRE PROTECTION SERVICE

Materials and equipment shall have been tested by Underwriters Laboratories, Inc. and listed in UL Fire Prot Dir or approved by Factory Mutual and listed in FM APP GUIDE. Where the terms "listed" or "approved" appear in this specification, such shall mean listed in UL Fire Prot Dir or

FM APP GUIDE.

2.4 UNDERGROUND PIPING SYSTEMS

Underground piping for the sprinkler/foam system shall comply 21 13 20.00 20

FOAM FIRE EXTINGUISHING FOR AIRCRAFT HANGARS.

2.5 ABOVEGROUND PIPING COMPONENTS

2.5.1 Steel Pipe

Except as modified herein all new piping shall be black steel schedule 40 as permitted by NFPA 13 and shall conform to applicable provisions of ASTM A795/A795M, ASTM A53/A53M, or ASTM A135/A135M. Pipe in which threads or grooves are cut or rolled formed shall be Schedule 40 or shall be listed by Underwriters' Laboratories to have a corrosion resistance ratio (CRR) of

1.0 or greater after threads or grooves are cut or rolled formed. Pipe shall be marked with the name of the manufacturer, kind of pipe, and ASTM designation.

2.5.2 Fittings for Non-Grooved Steel Pipe

Fittings shall be cast iron conforming to ASME B16.4, steel conforming to ASME B16.9 or ASME B16.11, or malleable iron conforming to ASME B16.3.

Fittings into which sprinklers, drop nipples or riser nipples (sprigs) are screwed shall be threaded type. Plain-end fittings with mechanical couplings, fittings that use steel gripping devices to bite into the pipe and segmented welded fittings shall not be used.

2.5.3 Grooved Mechanical Joints and Fittings

Joints and fittings shall be designed for not less than 250 psi service and shall be the product of the same manufacturer; segmented welded fittings shall not be used. Fitting and coupling houses shall be malleable iron conforming to ASTM A47/A47M, Grade 32510; ductile iron conforming to ASTM A536, Grade 65-45-12. Gaskets shall be of silicon compound and approved for dry fire protection systems. Gasket shall be the flush type that fills the entire cavity between the fitting and the pipe. Nuts and bolts shall be heat-treated steel conforming to ASTM A183 and shall be cadmium plated or zinc electroplated.

2.5.4 Flanges

Flanges shall conform to NFPA 13 and ASME B16.1. Gaskets shall be non-asbestos compressed material in accordance with ASME B16.21, 1/16 inch thick, and full face or self-centering flat ring type.

2.5.4.1 Bolts

Bolts shall be ASTM A449, Type 1. Bolts shall extend no less than three full threads beyond the nut with bolts tightened to the required torque.

SECTION 21 13 18.00 10 Page 9

2.5.4.2 Nuts

Nuts shall be hexagon type conforming to ASME B18.2.2, ASTM A193/A193M, Grade 5, and ASTM A563, Grade C3 or DH3.

2.5.4.3 Washers

Washers shall meet the requirements of ASTM F436. 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 APP GUIDE 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

Manually operated sprinkler control valve and gate valve shall be outside stem and yoke (OS&Y) type or butterly type where indicated on plans and shall be listed in UL Bld Mat Dir or FM APP GUIDE.

2.5.6.2 Check Valves

Check valve 2 inches and larger shall be listed in UL Bld Mat Dir or FM APP GUIDE. Check valves 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 SUPERVISORY AIR SYSTEM

Provide an air supply system in accordance with NFPA 13. The connection pipe from the air compressor shall not be less than 1/2 inch in diameter and shall enter the system above the priming water level of the dry pipe valve. Install a check valve in the system supply air piping from the compressor. A shutoff valve of the renewable disc type shall be installed upstream of this check valve. The use of a stand-alone compressed nitrogen bottle system is not permitted. The use of a process that involves continuous venting of the piping network is not permitted.

2.7 Nitrogen Generation System

a. Provide and install a Nitrogen Generation System to include Air Bypass Tamper and Leak Detection Alarms.

b. Each Nitrogen Generation System shall be listed in the FM APP GUIDE, CE Approved and UL 508A listed.

c. A single Nitrogen Generation System shall provide supervisory pressure between 0-60 psi for up to 20,000 gallons of sprinkler pipe capacity within all zones. For a building containing more than 20,000 gallons of total capacity, consult nitrogen generator manufacturer to verify correct system for the project.

d. The Nitrogen Generation System shall either have an integrated, SECTION 21 13 18.00 10 Page 10 oil-less compressor located within the Nitrogen Generation System's cabinet, or separate oil-bathed air compressor package to be mounted on vibration isolating mounts.

e. The Nitrogen Generation System's cabinet shall be wall or skid mounted.

f. The Nitrogen Generation System shall provide a minimum of 98% Nitrogen purity throughout all system piping within 14 days from commencement of the inerting process.

g. The nitrogen purity of the Nitrogen Generation System shall be monitored and verified via hand held portable.

h. The Nitrogen Generation System shall be powered by 120V/1/60hz requiring a 20 AMP dedicated circuit.

i. For each Nitrogen Generation System, the manufacturer shall provide a single Nitrogen Storage Tank. The Nitrogen Storage Tank shall be DOT or ASME rated to 150 psi and shall be provided with ASME rated 140 psi Safety Relief valve, on/off valve and 1/2" NPT I/O fitting.

j. The Nitrogen Generation System and Nitrogen Storage Tank shall be connected by the Sprinkler Contractor using 1/2" black steel pipe rated for 150 psi.

2.8 Air Compressor

Air compressor(s) shall UL listed for fire protection. Each Nitrogen Generation System shall be provided with an air compressor package capable of filling the largest dry pipe fire sprinkler zone to the required pressure within 30 minutes. Compressor shall be single stage oil-free type, air-cooled, electric-motor driven, equipped with a check valve, shutoff valve and pressure switch for automatic starting and stopping.

Pressure switch shall be factory set to start the compressor at 30 psi and stop it at 40 psi. A safety relief valve, set to operate at 65 psi, shall be provided. The air compressor System shall be powered by 460V/3/60hz requiring a 20AMP dedicated circuit.

2.8.1 Type 1 Nitrogen Generaton System Air Compressor Requirements

The Type 1 Nitrogen Generation System contains an integrated air compressor capable of providing clean, dry, oil free compressed feed air to the Nitrogen Generation System.

a. A separate, basic air compressor will need to be provided separately in order to achieve the 30 minute fill time required by NFPA 13.

b. The Nitrogen Generation System to be provided with an integral Air Bypass Tamper Alarm, and the piping from the Air Compressor shall run through the Air Bypass Tamper Alarm going to the Air Maintenance Device(s) so either air from the air compressor or nitrogen from the Nitrogen Generation System can be used to provide supervisory pressure to the dry pipe sprinkler system.

2.8.2 Type 2 & 3 Nitrogen Generaton System Air Compressor Requirements

Provide an oil-bathed air compressor package approved by the Nitrogen Generation System manufacturer which is capable of producing clean, dry, oil-free compressed feed air to the Nitrogen Generation System and

SECTION 21 13 18.00 10 Page 11 achieving the 30 minute fill time.

a. The air compressor shall be provided with an aftercooler, automatic tank drain, coalescing filter (to remove residual oil) and a refrigerated air dryer package.

b. The Nitrogen Generation System to be provided with an integral Air Bypass Tamper Alarm, and the piping from the Air Compressor shall run through the Air Bypass Tamper Alarm going to the Air Maintenance Device(s) so either air from the air compressor or nitrogen from the Nitrogen Generation System can be used to provide supervisory pressure to the dry pipe sprinkler system.

c. Electrical shall be provided for the air compressor per the manufacturer's specifications (i.e. wire size, voltage and proper breaker).

2.9 Air Pressure Maintenance Device

Device shall be a pressure regulator that automatically reduces supply air to provide the pressure required to be maintained in the piping system.

The device shall have a cast bronze body and valve housing complete with diaphragm assembly, spring, filter, ball check to prevent backflow, 1/16 inch restriction to prevent rapid pressurization of the system, and adjustment screw. The device shall be capable of reducing an inlet pressure of up to 100 psig to a fixed outlet pressure adjustable to 10 psig.

2.10 Air Supply Piping System

System shall be configured so that each dry pipe system is equipped with a separate pressure maintenance device, shutoff valve, bypass valve and pressure gauge. Piping shall be galvanized steel in accordance with ASTM A795/A795M or ASTM A53/A53M.

2.11 Alarm Integration

The Nitrogen Generation System shall be designed with both an integrated Air Bypass Tamper Alarm and Leak Detection System. Each alarm shall contain an isolated dry contact.

a. The Air Bypass Tamper Alarm shall be designed to alarm should a technician inadvertently leave the Nitrogen generator offline (i.e.

bypassed by compressed air) or accidently turned off.

b. The Leak Detection System shall send a signal to the building fire alarm system should significant leaks develop within the dry pipe fire sprinkler piping, prior to them becoming catastrophic and causing supervisory pressure to fall below specification. These leaks shall be addressed immediately in order to minimize unnecessary runtime on the Nitrogen Generation System. The Leak Detection System shall also be designed to send a signal to the fire alarm system if there is a failure with the Nitrogen Generation System or air compressor.

2.12 PRESSURE REDUCING VALVE

Furnish and install a field adjustable pressure reducing valve on the hangar hangar sprinkler risers.

a. Standard: UL's "Fire Protection Equipment Directory" listing or

SECTION 21 13 18.00 10 Page 12

"Approval Guide," published by FM Global, or equivalent listing.

b. Pressure Rating: Factory rated at 175 psi, or 10 psi in excess of the maximum system pressure, whichever is greater.

2.13 SPRINKLERS

Sprinklers for preaction systems shall be automatic, fusible solder or glass bulb type. Sprinklers with internal O-rings shall not be used.

Sprinklers shall be used in accordance with their listed coverage limitations. Temperature classification shall be intermediate. Sprinklers in high heat areas including attic spaces or in close proximity to unit heaters shall have temperature classification in accordance with NFPA 13.

Extended coverage sprinklers shall not be used.

2.13.1 Pendent Sprinkler

Pendent sprinkler shall be of the glass bulb type, quick-response type.

Pendent sprinklers shall have a polished chrome finish. Pendent sprinlkers shall be listed dry pendents.

2.13.2 Upright Sprinkler

Upright sprinkler shall be chrome-plated quick-response type.

2.13.3 Corrosion Resistant Sprinkler

Corrosion resistant sprinkler shall be the upright or pendent type installed in locations as indicated. Corrosion resistant coatings shall be factory-applied by the sprinkler manufacturer.

2.14 ACCESSORIES

2.14.1 Sprinkler Cabinet

Spare sprinklers shall be provided in accordance with NFPA 13 and shall be packed in a suitable metal or plastic cabinet. Spare sprinklers shall be representative of, and in proportion to, the number of each type and temperature rating of the sprinklers installed. At least one wrench of each type required shall be provided.

2.14.2 Pendent Sprinkler Escutcheon

Escutcheon shall be one-piece metallic type with a depth of less than 3/4 inch and suitable for installation on pendent sprinklers. The escutcheon shall have a factory finish that matches the pendent sprinkler heads.

2.14.3 Pipe Escutcheon

Escutcheon shall be polished chromium-plated zinc alloy, or polished chromium-plated copper alloy. Escutcheons shall be either one-piece or split-pattern, held in place by internal spring tension or set screw.

2.14.4 Sprinkler Guard

Guard shall be a steel wire cage designed to encase the sprinkler and protect it from mechanical damage. Guards shall be provided on sprinklers located less than 7ft above finished floor and in electrical, mechanical, and storage rooms.

SECTION 21 13 18.00 10 Page 13

2.14.5 Identification Sign

Valve identification sign shall be minimum 6 inches wide by 2 inches high with enamel baked finish on minimum 18 gauge steel or 0.024 inch aluminum with red letters on a white background or white letters on red background.

Wording of sign shall include, but not be limited to "main drain," "auxiliary drain," "inspector's test," "alarm test," "alarm line," and similar wording as required to identify operational components.All detection and terminal devices shall have engraved plastic or metallic alphanumeric identification, which shall be keyed to the posted operations and maintenance instructions.

2.15 CONTROL PANEL

Panel for releasing the preaction valves shall be the DET-TRONICS EAGLE QUANTUM PERMIER FIRE DETECTION/ RELEASING SYSTEM. Refer to 21 13 20.00 20

FOAM FIRE EXTINGUISHING FOR AIRCRAFT HANGARS.

2.16 ALARM INITIATING DEVICES

2.16.1 Heat Detectors

Detectors located in areas subject to moisture, exterior atmospheric conditions or hazardous locations as defined in NFPA 70 shall be approved for such locations. Detectors shall be listed or approved for 25 foot spacing between detectors. Detectors shall be spaced a maximum of 25 ft without reduction in spacing due to ceiling height. The detector shall be equipped with an alarm indicating light in its base that lights when the detector is in an alarm condition. Detectors shall wired cross zoned with Class A wiring. Five spare detectors of each type and temperature rating shall be provided.

2.16.1.1 Rate Compensation Detector

Non-addressable, unpowered, detector shall be of the spot type with a temperature classification rating of 160 to 170 degrees Fahrenheit.

Detectors shall be UL or FM listed. Detectors listed or approved as "rate anticipation" type will be accepted. Detector shall automatically reset when temperature drops below detector temperature rating. Detector shall be hermetically sealed.

2.16.2 Manual Actuation Station

Station shall be mounted at 42 inches above the floor, unless otherwise shown. Station shall be arranged to activate the preaction system.

Station shall be dual-action type requiring two separate operations in order to cause system discharge. Station shall be colored lime yellow.

Station shall be provided with a positive visible indication of operation of the station. Station shall be weatherproof type and shall be provided with an engraved label indicating PREACTION SYSTEM.

2.16.3 Sprinkler Pressure Alarm Switch

Pressure switch shall include a metal housing with a neoprene diaphragm, SPDT snap action switches. The switch shall have a service pressure rating of 175 psi. There shall be two SPDT (Form C) contacts factory adjusted to operate at 4 to 8 psi. The switch shall be capable of being mounted in any position in the alarm line trim piping of the alarm check valve.

SECTION 21 13 18.00 10 Page 14

2.16.4 Valve Supervisory (Tamper) Switch

Switch shall be suitable for mounting to the type of control valve to be supervised open. The switch shall be tamper resistant and contain one set of SPDT (Form C) contacts arranged to transfer upon removal of the housing cover or closure of the valve of more than two rotations of the valve stem.

2.17 WIRING

Wiring for alternating current (AC) circuits shall be 12 AWG minimum.

Wiring for low voltage direct current (DC) circuits shall be No. 14 AWG minimum. Power wiring (over 28 volts) and control wiring shall be isolated. Wiring shall conform to NFPA 70. System field wiring shall be solid copper and installed in electrical metallic tubing or in metallic conduit, except rigid plastic conduit may be used under slab-on-grade.

Conductors shall be color coded. Conductors used for the same function shall be similarly color coded. Wiring color code shall remain uniform throughout the circuit. Pigtail or T-tap connections to alarm initiating, alarm indicating, supervisory, and actuation circuits are prohibited. All fire detection and alarm system conductors shall be run in minimum 3/4 in.

electrical metallic tubing (EMT) conduit. Exception would be those locations deemed unsuitable for EMT conduit. In such cases, use rigid or PVC type conduit. Use of flexible metal conduit (FMC) or liquid-tite conduit is not permitted except in areas subject to extreme vibration, and where used, shall be limited to 6 ft. lengths.

PART 3 EXECUTION

3.1 EXAMINATION

After becoming familiar with all details of the work, verify all dimensions in the field, and advise the Contracting Officer of any discrepancy before performing the work.

3.2 INSPECTION BY FIRE PROTECTION SPECIALIST

The Fire Protection Specialist shall inspect the sprinkler system periodically during the installation to assure that the sprinkler system installed in accordance with the contract requirements. The Fire Protection Specialist shall witness the preliminary and final tests, and shall sign the test results. The Fire Protection Specialist, after completion of the system inspections and a successful final test, shall certify in writing that the system has been installed in accordance with the contract requirements, including signed approval of the Preliminary, Detection and Control Systems, and Final Acceptance Test Reports. Any discrepancy shall be brought to the attention of the Contracting Officer in writing, no later than three working days after the discrepancy is discovered.

3.3 ABOVEGROUND PIPING INSTALLATION

3.3.1 Piping in Exposed Areas

Exposed piping shall be installed so as not diminish exit access widths, corridors, or equipment access. Exposed horizontal piping, including drain piping, shall be installed to provide maximum headroom.

SECTION 21 13 18.00 10 Page 15

3.3.2 Piping in Finished Areas

In areas with suspended or dropped ceilings and in areas with concealed spaces above the ceiling, piping shall be concealed above ceilings. Piping shall be inspected, tested and approved before being concealed. Risers and similar vertical runs of piping in finished areas shall be concealed.

3.3.3 Pendent Sprinklers Locations

Sprinklers installed in the pendent position shall be of the listed dry pendent type, unless otherwise indicated. Dry pendent sprinklers shall be of the required length to permit the sprinkler to be threaded directly into a branch line tee. Hangers shall be provided on arm-overs to drop nipples supplying pendent sprinklers when the arm-over exceeds 12 inches for steel pipe. Dry pendent sprinkler assemblies shall be such that sprinkler ceiling plates or escutcheons are of the uniform depth throughout the finished space. Pendent sprinklers in suspended ceilings shall be a minimum of 6 inches from ceiling grid. Recessed pendent sprinklers shall be installed such that the distance from the sprinkler deflector to the underside of the ceiling shall not exceed the manufacturer's listed range and shall be of uniform depth throughout the finished area.

3.3.4 Upright Sprinklers

Riser nipples or "sprigs" to upright sprinklers shall contain no fittings between the branch line tee and the reducing coupling at the sprinkler.

Riser nipples exceeding 30 inches in length shall be individually supported.

3.3.5 Pendent Sprinklers Locations

Sprinklers installed in the pendent position shall be of the listed dry pendent type, unless otherwise indicated. Dry pendent sprinklers shall be of the required length to permit the sprinkler to be threaded directly into a branch line tee. Hangers shall be provided on arm-overs exceeding 12 inches in length. Dry pendent sprinkler assemblies shall be such that sprinkler ceiling plates or escutcheons are of the uniform depth throughout the finished space. Pendent sprinklers in suspended ceilings shall be a minimum of 6 inches from ceiling grid. Recessed pendent sprinklers shall be installed such that the distance from the sprinkler deflector to the underside of the ceiling shall not exceed the manufacturer's listed range and shall be of uniform depth throughout the finished area.

3.3.6 Pipe Joints

Pipe joints shall conform to NFPA 13, except as modified herein. Not more than four threads shall show after joint is made up. Welded joints will be permitted, only if welding operations are performed as required by NFPA 13 at the Contractor's fabrication shop, not at the project construction site. Flanged joints shall be provided where indicated or required by NFPA 13. Grooved pipe and fittings shall be prepared in accordance with the manufacturer's latest published specification according to pipe material, wall thickness and size. Grooved couplings and fittings shall be from the same manufacturer. Grooved joints shall not be used in concealed locations, such as behind solid walls or ceilings, unless an access panel is shown on the drawings for servicing or adjusting the joint.

3.3.7 Reducers

Reductions in pipe sizes shall be made with one-piece tapered reducing

SECTION 21 13 18.00 10 Page 16 fittings. The use of grooved-end or rubber-gasketed reducing couplings will not be permitted. When standard fittings of the required size are not manufactured, single bushings of the face type will be permitted. Where used, face bushings shall be installed with the outer face flush with the face of the fitting opening being reduced. Bushings shall not be used in elbow fittings, in more than one outlet of a tee, in more than two outlets of a cross, or where the reduction in size is less than 1/2 inch.

3.3.8 Pipe Penetrations

Cutting structural members for passage of pipes or for pipe-hanger fastenings will not be permitted. Pipes that must penetrate concrete or masonry walls or concrete floors shall be core-drilled and provided with pipe sleeves. Each sleeve shall be Schedule 40 galvanized steel, ductile iron or cast iron pipe and shall extend through its respective wall or floor and be cut flush with each wall surface. Sleeves shall provide required clearance between the pipe and the sleeve in accordance with NFPA 13. The space between the sleeve and the pipe shall be firmly packed with mineral wool insulation. Where pipes penetrate fire walls, fire partitions, or floors, pipes shall be fire stopped in accordance with Section 07 84 00 FIRESTOPPING. In penetrations that are not fire-rated or not a floor penetration, the space between the sleeve and the pipe shall be sealed at both ends with plastic waterproof cement that will dry to a firm but pliable mass or with a mechanically adjustable segmented elastomer seal.

3.3.9 Escutcheons

Escutcheons shall be provided for pipe penetration of ceilings and walls.

Escutcheons shall be securely fastened to the pipe at surfaces through which piping passes.

3.3.10 Inspector's Test Connection

Unless otherwise indicated, test connection shall consist of 1 inch pipe connected to the remote branch line and at the riser as a combination test and drain valve; a test valve located approximately 7 feet above the floor;

a smooth bore brass outlet equivalent to the smallest orifice sprinkler used in the system; and a painted metal identification sign affixed to the valve with the words "Inspector's Test." The discharge orifice shall be located outside the building wall directed so as not to cause damage to adjacent construction or landscaping during full flow discharge.

3.3.11 Drains

Provide main drain piping to discharge at a safe point outside the building.

Auxiliary drains shall be provided as indicated and as required by NFPA 13.

When the capacity of trapped sections of pipe is less than 3 gallons, the auxiliary drain shall consist of a valve not smaller than 1/2 inch and a plug or nipple and cap. When the capacity of trapped sections of piping is more than 3 gallons, the auxiliary drain shall consist of two 1 inch valves and one 2 x 12 inch condensate nipple or equivalent, located in an accessible location. Tie-in drains shall be provided for multiple adjacent trapped branch pipes and shall be a minimum of 1 inch in diameter. Tie-in drain lines shall be pitched a minimum of 1/2 inch per 10 feet. Do not install drains in the hangar bay.

3.3.12 Identification Signs

Signs shall be affixed to each control valve, inspector test valve, main

SECTION 21 13 18.00 10 Page 17 drain, auxiliary drain, test valve, and similar valves as appropriate or as required by NFPA 13. Hydraulic design data nameplates shall be permanently affixed to each sprinkler riser as specified in NFPA 13.

3.4 UNDERGROUND PIPING INSTALLATION

Underground piping for the sprinkler/foam system shall comply 21 13 20.00 20

FOAM FIRE EXTINGUISHING FOR AIRCRAFT HANGARS.

3.5 ELECTRICAL WORK

Unless otherwise specified herein, power supply equipment and wiring shall be in accordance with Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM.

3.5.1 Overcurrent and Surge Protection

All equipment connected to alternating current circuits shall be protected from surges in accordance with IEEE C62.41.1, IEEE C62.41.2 and NFPA 70.

Cables and conductors that serve as communications links, except fiber optics, shall have surge protection circuits installed at each end. Fuses shall not be used for surge protection.

3.5.2 Grounding

Grounding shall be provided to building ground.

3.5.3 Wiring

System field wiring shall be installed in 3/4 inch minimum diameter electrical metallic tubing or metallic conduit. Wiring for the sprinkler system fire detection and control system shall be installed in tubing or conduits dedicated for that use only and not installed in conduit, outlet boxes or junction boxes which contain lighting and power wiring or equipment. Circuit conductors entering or leaving any mounting box, outlet box enclosure or cabinet shall be connected to screw terminals with each terminal marked and labeled in accordance with the wiring diagram. No more than one conductor shall be installed under any screw terminal.

Connections and splices shall be made using screw terminal blocks. The use of wire nut type connectors is not permitted. Wiring within any control equipment shall be readily accessible without removing any component parts. Conductors shall be color-coded and shall be identified within each enclosure where a connection or termination is made. Conductor identification shall be by plastic-coated, self-sticking, printed markers or by heat-shrink type sleeves. Circuits shall be wired to maintain electrical supervision so that removal of any single wire from any device shall cause a "trouble" condition on the control panel.

3.5.4 Control Panel

The control panel and its assorted components shall be mounted so that no part of the enclosing cabinet is less than 24 inches and not more than 78 inches above the finished floor.

3.5.5 Detectors

Detectors shall be ceiling-mounted in accordance with NFPA 72 and shall be at least 12 inches from any part of any lighting fixture. Detectors shall be located at least 3 feet from diffusers of air handling systems. Each detector shall be provided with appropriate mounting hardware as required

SECTION 21 13 18.00 10 Page 18 by its mounting location.

3.6 PIPE COLOR CODE MARKING

Color code mark piping as specified in Section 21 13 13.00 10 WET PIPE

SPRINKLER SYSTEM, FIRE PROTECTION.

3.7 PRELIMINARY TESTS

The system, including the underground water mains, the aboveground piping, detectors and control system and system components shall be tested to assure that equipment and components function as intended. Submit proposed procedures for Preliminary Tests, no later than 14 days prior to the proposed start of the tests, proposed date and time to begin the tests, submitted with the Procedures. The underground and aboveground interior piping systems and attached appurtenances subjected to system working pressure shall be tested in accordance with NFPA 13 and NFPA 24. Upon completion of specified tests, complete and submit certificates as specified, and 3 copies of the completed Preliminary Tests Reports, no later than 7 days after the completion of the Preliminary Tests. The Report shall include both the Contractor's Material and Test Certificate for Underground Piping and the Contractor's Material and Test Certificate for Aboveground Piping. All items in the Preliminary Tests Report shall be signed by the Fire Protection Specialist.

3.7.1 Hydrostatic Testing

New underground piping shall be hydrostatically tested in accordance with NFPA 24. The allowable leakage shall be measured at the specified test pressure by pumping from a calibrated container. The amount of leakage at the joints shall not exceed 2 quarts per hour per 100 gaskets or joints, regardless of pipe diameter.

3.7.2 Aboveground Piping

3.7.2.1 Hydrostatic Testing

Aboveground piping shall be hydrostatically tested in accordance with NFPA 13 at not less than 200 psi or 50 psi in excess of maximum system operating pressure and shall maintain that pressure without loss for 2 hours. There shall be no drop in gauge pressure or visible leakage when the system is subjected to the hydrostatic test. The test pressure shall be read from a gauge located at the low elevation point of the system or portion being tested.

3.7.2.2 Air Pressure Test

As specified in NFPA 13, an air pressure leakage test at 50 psi shall be conducted for 24 hours. There shall be no drop in gauge pressure in excess of 1.5 psi for the 24 hours. This air pressure test is in addition to the required hydrostatic test.

3.7.2.3 Backflow Prevention Assembly Forward Flow Test

Each backflow prevention assembly shall be tested at system flow demand, including all applicable hose streams, as specified in NFPA 13. Provide all equipment and instruments necessary to conduct a complete forward flow test, including 2.5 inch diameter hoses, playpipe nozzles, calibrated pressure gauges, and pitot tube gauge. Provide all necessary supports to

SECTION 21 13 18.00 10 Page 19 safely secure hoses and nozzles during the test. At the system demand flow, the pressure readings and pressure drop (friction) across the assembly shall be recorded. A metal placard shall be provided on the backflow prevention assembly that lists the pressure readings both upstream and downstream of the assembly, total pressure drop, and the system test flow rate.