Fire supression Specs-15325.pdf

WET PIPE SPRINKLER SYSTEM 15325-1

SECTION 15325 - WET PIPE SPRINKLER SYSTEM

PART 1 GENERAL

1.1 WORK INCLUDED

A. Inside and outside wet piping, including sprinkler heads, valves, hangers and supports, sleeves, fire department connections, alarms and accessories. Provide risers as required for wet pipe systems.

1.2 RELATED WORK AND APPLICABLE REQUIREMENTS SPECIFIED ELSEWHERE

A. DIVISION 1 - GENERAL REQUIREMENTS: These shall apply to all work included in this section.

B. Potential Related Work:

1. DIVISION 3 - CONCRETE

2. Section 15330 - AFFF Fire Suppression Systems

3. Section 15335 - Fire Pump Systems

4. Section 15340 - Fire Detection, Alarm and Equipment Activation Systems

1.3 APPLICABLE PUBLICATIONS: The publications listed below form a part to this specification to the extent referenced. The publications are referred to in the text by basic designation only.

A. Federal Specifications (Fed. Spec.):

TT-E-489F Enamel, Alkyd, Gloss (For Exterior and & AM 1 Interior Surface)

TT-P-645A Primer, Paint, Zinc Chromate, Alkyd type

B. Military Specification (Mil. Spec.):

DOD-P-15328D Primer (Wash), Pre-Treatment (Formula No. 117 for Metals) (Metric)

C. American Society for Testing and Materials (ASTM) Publications:

A 53-86 Pipe, Steel, Black and Hot Dipped Zinc Coated (Galvanized) Welded and Seamless for Ordinary Uses

A 120-86 Pipe, Steel, Black and Hot Dipped Zinc Coated (Galvanized) Welded and Seamless for Ordinary Uses

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D. American Water Works Association (AWWA) Publications:

C601-68 Disinfecting Water Mains.

E. Factory Mutual System (FM) Publications

1995 Approval Guide

F. National Fire Protection Association (NFPA) Publications:

13-94 Sprinkler Systems 24-92 Private Fire Service Mains

G. Underwriters' Laboratories, Inc. (UL) Publications:

1995 Fire Protection Equipment Listing

H. Department of the Air Force:

ETL-90-09 Engineering Technical Letter, as amended by attachment to ANGRC/CEE and ANG/CEE review comments

1.4 QUALIFICATIONS OF INSTALLER: Prior to installation, submit data for approval by the Contracting Officer, showing that the Contractor has successfully installed automatic fire extinguishing sprinkler systems of the same type and design as specified herein. The data shall include the names and locations of at least two installations where the contractor has installed such systems. The Contractor shall indicate the type and design of each system and certify that each system has performed satisfactorily in the manner intended for a period of not less than 18 months.

The design and installation of the wet pipe sprinkler systems shall be coordinated with the systems being furnished and constructed under SECTIONS: AFFF FIRE SUPPRESSION SYSTEMS, FIRE PUMP SYSTEMS and FIRE DETECTION, ALARM AND EQUIPMENT ACTIVATION SYSTEMS. All the work covered by these sections shall be the responsibility of one fire protection firm. This firm shall normally be engaged in the field of fire protection with a registered fire protection engineer on staff. Certification of this qualification shall be submitted for approval.

A. Description of Work:

1. The work includes designing and providing new automatic wet pipe fire extinguishing sprinkler systems for uniform distribution of water to afford complete fire protection coverage throughout the areas indicated for wet pipe sprinkler system(s) in the project drawings.

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2. The design, equipment, materials, installation and workmanship shall be in strict accordance with the required and advisory provisions of NFPA 13 and 24, except as modified herein. Include all materials, accessories and equipment necessary to provide each system complete and ready for use. Design and install each system to give full consideration to blind spaces, piping, electrical equipment, ductwork, and all other construction and equipment to afford complete coverage in accordance with detailed drawings to be submitted for approval. Devices and equipment for fire protection service shall be of an approved make and type listed by the Underwriters' Laboratories, Inc. or approved by the Factory Mutual System. In the publications referred to herein the advisory provisions shall be considered to be mandatory, as though the word "shall" had been substituted for "should" wherever it appears; reference to the "authority having jurisdiction" shall be interpreted to mean the Contracting Officer. The work shall begin 5 feet outside of the building walls.

B. Submittals Required: Partial submittals will not be accepted. Annotate descriptive data to show specific model, type, and size of each item the Contractor proposes to furnish.

Prepare working drawings on sheets not smaller than 30 inches by 42 inches, in accordance with the requirements for "Working Drawings (Plans)" as specified in NFPA 13, and include data essential to the proper installation of each system. Do not commence work until the design of each system and the various components have been approved. The Contracting Officer will review and approve all submittals. Before any work is commenced, submit for approval complete sets of working drawings and calculations for each sprinkler system, hydraulic calculations to show the basis for the design, graphs, or tables showing the pressure-discharge relationship for the sprinkler heads; and full descriptive data for pipe, fittings, alarm valves, outside stem & yoke valves, check valves, water-motor alarms, sprinkler heads, hangers, pressure switches, devices, materials, and associated equipment.

C. Instruction Manuals: Furnish instruction manuals containing complete operation and maintenance instructions for the specific make and model of the alarm valve furnished.

Place one copy of each instruction manual in a flexible oil resistant protective binder and mount in an accessible location on the vicinity of each alarm valve. Furnish three additional copies of each instruction manual.

D. As-Built (Record) Working Drawings: After completion, but before final acceptance of the work, furnish a complete set of drawings of each sprinkler system for record purposes. The drawings shall not be smaller than 30 inches by 42 inches reproducible drawings on mylar film with title block (8 inches by 4 inches) similar to full size contract drawings. Furnish the as-built (record) working drawings in addition to the as-built contract drawings required by Section 01021.

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PART 2 - PRODUCTS

2.1 DESIGN OF SPRINKLER SYSTEMS: Wet pipe fire extinguishing systems shall provide a uniform distribution of water over the design area and shall conform to NFPA 13 and to the requirements specified herein. The wet pipe sprinkler systems shall be hydraulically designed in accordance with the requirements of NFPA 13.

A. Sprinkler Heads: Heads shall have nominal 1/2" or 17/32" orifice. Release elements of each head shall be of the intermediate temperature rating or higher as suitable for the individual location where it is installed. Provide chromium plated ceiling plates and pendent sprinklers below suspended ceilings. Provide corrosion resistant sprinkler heads and sprinkler head guards as required by NFPA 13. Sprinkler heads shall be rated for 250 oF to 300 oF.

B. Cabinet: Provide extra sprinkler heads and sprinkler head wrench in a metal cabinet adjacent to the alarm valve within each building. The number and types of extra sprinkler heads shall be as specified in NFPA 13.

D. Alarm Valve: Valve shall be of the variable pressure type complete with all accessories and appurtenances necessary for the proper operation of each system and to prevent false alarms due to surges or other conditions in the supply to each system.

E. Density of Application of Water: Size pipe to provide the specified density when the system is discharging the specified total maximum required flow. Application to horizontal surfaces below the sprinklers shall be spaced in accordance with the hazard classifications as specified in NFPA 13 and on the project drawings. In addition an outside hose stream requirement of 250 gpm shall be provided.

F. Sprinkler Discharge Area: Area shall be hydraulically most remote area as defined in NFPA 13 for hazard classification as specified on the project drawings.

G. Friction Losses: Calculate losses in pipe in accordance with the Hazen - Williams formula with 'C' value of 120 for steel pipe, 150 for copper tube, and 140 for buried cement lined ductile iron pipe and asbestos cement pipe.

H. Location of Sprinkler Heads: Heads in relation to the ceiling and the spacing of sprinkler heads shall not exceed that permitted by NFPA 13 for hazard occupancy as specified on the project drawings. The spacing of sprinklers on the branch lines shall be essentially uniform.

I. Water Supply: Base hydraulic calculations on a static pressure of 125 pounds per square inch gauge (psig) with 2,500 gpm being available at the discharge of the primary and reserve pumps.

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2.2 ALARMS:

A. Water Motor Alarm: Provide alarms of the approved weatherproof and guarded type, to sound locally on the flow of water in each sprinkler system to which it is connected.

Mount alarms on the outside of the outer walls of each building, at a location as directed.

B. Pressure Switch: Provide switch with circuit opener or closer for the automatic transmittal of an alarm over the facility fire alarm system and connect into the fire alarm system.

Alarm actuating device shall be of the mechanical diaphragm controlled water pressure type with retard device. The retard device shall be adjustable from 10 to 60 seconds, and shall be of a type which instantly recycles when pressure is released on the diaphragm. The alarm tone shall be of a “pulsating” type.

2.3 ABOVE GROUND PIPING SYSTEMS: Provide fittings for changes in direction of piping and for all connections. Make changes in piping sizes through standard tapered reducing pipe fittings;

the use of bushings will not be permitted. Jointing compound for pipe threads shall be polytetrafluroethylene (PTFE) pipe thread tape, pipe cement and oil, or graphite and oil; apply only on male threads. Pipe nipples 6 inches long and shorter shall be Schedule 40 steel pipe. Run the piping concealed in areas with suspended ceilings.

A. Sprinkler Pipe and Fittings: Sprinkler pipe and fittings shall be in accordance with NFPA 13 except that piping smaller than 2 inch shall be schedule 40. Water motor alarm drain 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 2 inch and larger. Grooved mechanical fittings shall be ductile iron or malleable iron with grooved or shouldered designs to accept grooved end couplings. Use of segmentally welded steel fittings, restriction orifices, reducing flanges, and plain-end fittings with mechanical couplings ( which utilizes steel gripping devices to bite into pipe when pressure is applied) will not be permitted. Grooved mechanical couplings shall be ductile or malleable iron housings, a synthetic rubber gasket of a central cavity pressure responsive t design, with nuts, bolts, locking pin, locking toggle or lugs to secure rolled grooved pipe and fittings. All coupling and fitting products shall be from a single approved manufacturer.

B. Pipe Hangers (Supports): Provide in accordance with NFPA 13.

C. Valves: Provide valves as required by NFPA 13 and of types approved for fire service.

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1. Check Valves: Cast iron body with bolted top, horizontal swing with a bronze disc or cast iron disc ring and flanged ends, or grooved end, electro plated ductile iron body with dual disc design. U.L. listed to 250 psi, tapped for 1/2" ball drip.

2. Gate valves: Flanged, outside screw and yoke type, open by counter-clockwise rotation, rated for at least a 175 psi working pressure.

3. Butterfly valves: Grooved end or wafer style. 2-1/2 inch to 8 inch shall be listed to 175 psi with internal tamper switch. Body and disc shall be ductile iron.

4. Ball Valves: 2 inch and smaller shall be threaded, forged brass construction, with teflon seats and blowout proof stem. UL/FM listed to 600 psi.

D. 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.

E. Inspector's Test Connection: Provide test connections approximately 6 feet above the floor for each sprinkler system or portion of each sprinkler system equipped with an alarm device and locate at the hydraulically most remote part of each system. Test Connection shall be an integral UL/FM listed assembly incorporating a combination sight glass/orifice. Orifice to be same as sprinkler head orifice.

F. 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.

G. 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 0.25-inch space between exterior of piping or pipe insulation and interior of sleeve. Firmly pack space with insulation and caulk at both ends of the sleeve with plastic waterproof cement.

1. Sleeves in Masonry and Concrete Walls, Floors: Provide ASTM A 53 or ASTM A 120, Schedule 40 or Standard Weight, zinc coated steel pipe sleeves. Sleeves in floor slabs shall extend 3 inches above the finished floor.

2. Sleeves in partitions, and Other Than Masonry and Concrete Walls, Floors, and Roofs: Provide zinc coated steel sheet having a nominal weight of not less than

0.90 pounds per square foot.

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H. Escutcheon Plates: Provide approved one piece of split hinge type plates for piping passing through floors, walls and ceilings in both exposed and concealed areas. Provide chromium plated metal plates where pipe passes through finished ceilings. Provide other plates of steel or cast iron with aluminum paint finish. Securely anchor plates in place with set screws or other approved positive means.

I. Fire Department Inlet Connections: Provide inlet connections approximately 3 feet above grade, of the approved two way type with 2.5-inch National Standard female hose threads with plug and chain.

2.4 BURIED PIPING SYSTEMS:

A. Pipe and Fittings: Provide outside coated cement lined ductile iron pipe and fittings conforming to NFPA 24 for piping less than 5 feet outside of the building walls.

Anchor the joints in accordance with NFPA 24 using pipe clamps and steel rods.

Minimum depth of cover shall be 3 feet. Piping more than 5 feet outside of the building walls shall be provided under Section 02713, "Water Distribution System."

1. Polyethylene for pipe encasement shall be in tube or sheet form, minimum nominal thickness of 0.008 inches, conforming to ANSI/AWWA C105.

PART 3 - EXECUTION

3.1 CONNECTIONS TO WATER SUPPLY SYSTEMS: Connections shall be to the new Fire Pump System.

3.2 CORROSION PROTECTION: All underground ductile iron pipe, valves, and fittings shall be encased in a polyethylene film in accordance with ANSI/AWWA Specification C105.

3.3 DISINFECTION: Disinfect new water piping in accordance with AWWA C601. Fill piping systems with solution containing minimum of 50 parts per million of available chlorine and allow solution to stand for a minimum of 24 hours. Flush solution from systems with clean water until maximum residual chlorine content is not greater than 0.2 parts per million.

3.4 FIELD PAINTING: Clean, pre-treat, prime, and paint new sprinkler system including valves, piping, conduit, hangers, miscellaneous metalwork, and accessories. Apply coatings to clean dry surfaces using clean brushes. Clean the surfaces to remove dust, dirt, rust, and loose mill scale.

Immediately after cleaning, provide the metal surfaces with one coat of Mil. Spec. DOD-P-15328 pre-treatment primer applied to a minimum dry film thickness of 0.3 mil, and one coat of Fed.

Spec. TT-P-645 primer applied to a minimum dry film thickness of one mil. Exercise care to avoid the painting of sprinkler heads or protective devices. Remove materials which are used to protect sprinkler heads, while painting is in process, upon the completion of painting. Remove sprinkler heads which are painted and provide new clean sprinkler heads of the proper type.

Provide primed surfaces with the following:

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A. Sprinkler Systems in Unfinished Areas: Unfinished areas are defined as attic spaces, spaces above suspended ceiling, crawl spaces, pipe chases, and spaces where walls or ceiling are not painted or not constructed of a pre-finished material. Provide primed surfaces with one coat of Fed. Spec. TT-E-489 red enamel applied to a minimum dry film thickness of one mil.

B. Sprinkler Systems in All Other Areas: Provide primed surfaces with two coats of paint to match adjacent surfaces, except provide valves and operating accessories with one coat of Fed. Spec. TT-E-489 red enamel applied to a minimum dry film thickness of one mil. Provide piping with 2-inch wide red enamel or self adhering red plastic tape bands spaced at maximum of 20-foot intervals throughout the piping systems, except in finished areas such as offices the red bands may be deleted.

3.5 ELECTRICAL WORK: Coordinate with other trades, all electrical connections as required by system installation. Furnish all electrical connections as required to provide complete working system.

3.6 FIELD TESTING AND FLUSHING:

A. Preliminary Tests: Hydrostatically test each system at 200 psig for a period of 2 hours.

Flush piping in accordance with NFPA 13. Piping above suspended ceilings shall be tested, inspected and approved before installation of ceilings. Test the alarms and other devices. Test the water flow alarms by flowing water through the inspector's test connection. When tests have been completed and corrections made, submit a signed and dated certificate, similar to that specified in NFPA 13, with a request for a formal inspection and tests.

B. Formal Inspection and Tests: Contracting Officer, or Contracting Officer's representative will witness formal tests and approve all systems before they are accepted. Submit the request for formal inspection at least 15 days prior to the date the inspection is to take place. An experienced technician regularly employed by the sprinkler installer shall be present during the inspection. At this inspection, repeat any or all of the required tests as directed. Correct defects in the work provided by the Contractor, and make additional tests until it has been demonstrated that the systems comply with all contract requirements. Everything required for testing shall be provided by the Contractor and all expenses, in connection with the tests, shall be defrayed by him.