Amend_0004_-_21_12_19_-_GROUND-MOUNTED_FIRE_WATER_STORAGE_TANKS.PDF

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081017 GROUND-MOUNTED FIRE SUPPRESSION-WATER STORAGE TANKS

SECTION 21 12 19 - GROUND-MOUNTED FIRE SUPPRESSION-WATER STORAGE TANKS

PART 1 - GENERAL

1.1 RELATED DOCUMENTS

A. Drawings and general provisions of the Contract, including General and Supplementary

Conditions and Division 01 Specification Sections, apply to this Section.

1.2 SUMMARY

A. Section includes a bolted-steel reservoir for storage of fire-suppression water.

B. Installation shall include tank insulation, pumps, piping, insulation and heat tracing for circulating tank water to prevent temperature of water from falling below NFPA requirements.

C. Installation shall be in compliance with NFPA 22, Standard for Water Tanks for Private Fire

Protection; National Fire Protection Association; 2013.

1.3 DEFINITIONS

A. Reservoir: Flat-bottomed, cylindrical, surface mounted water-storage tank with shell height equal to or less than its diameter.

1.4 ACTION SUBMITTALS

A. Product Data: Include rated capacities, accessories, appurtenances, and furnished specialties for each surface water-storage tank indicated.

B. Shop Drawings: Signed and sealed by a qualified professional engineer. Show fabrication and installation details for each surface water-storage tank, including the following:

1. Tank, roof, and shell openings.

2. Safety railings and ladders.

3. Plans, elevations, sections, details, and attachments to other work.

4. Structural analysis data signed and sealed by the qualified professional engineer registered in the State of Idaho responsible for their preparation.

5. Power, signal, and control wiring.

1.5 INFORMATIONAL SUBMITTALS

A. Qualification Data: For fabricator.

Revisions - October 24, 2017

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B. Welding certificates.

C. Bacteriological test results.

D. Field quality-control reports.

1.6 CLOSEOUT SUBMITTALS

A. Operation and Maintenance Data: For the following to include in emergency, operation, and maintenance manuals:

1. Obstruction lighting.

2. Tank heaters, as additive alternate.

1.7 QUALITY ASSURANCE

A. Fabricator Qualifications: Employ a qualified structural engineer to prepare calculations, Shop

Drawings, and other structural data for fabrication and erection of surface water-storage tanks.

1. Engineering Responsibility: Preparation of data for surface water-storage tanks, accessories, specified appurtenances, and concrete supports and foundations, including

Shop Drawings, based on testing and engineering analysis of manufacturer's standard units in assemblies similar to those indicated for this Project.

2. Comply with NFPA 22, 2013 Ed.

B. Welding Qualifications: Qualify procedures and personnel according to the following:

1. AWS D1.1/D1.1M, "Structural Welding Code--Steel."

2. AWS D1.3/D1.3M, "Structural Welding Code--Sheet Steel."

3. AWS D1.4/D1.4M, "Structural Welding Code--Reinforcing Steel."

C. Pipe Welding: Qualify procedures and personnel according to ASME Boiler and Pressure

Vessel Code: Section IX, "Welding, Brazing, and Fusing Qualifications."

PART 2 - PRODUCTS

2.1 PERFORMANCE REQUIREMENTS

A. Structural Performance: Surface water-storage tank, including structural reinforcement and foundation, shall be capable of withstanding the effects of dead and live gravity loads and winds of 110 mph in 3 second gusts.

B. Seismic Performance: Surface water-storage tank, including structural reinforcement and foundation, shall be capable of withstanding the effects of earthquake motions determined according to authorities having jurisdiction.

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C. Thermal Movements: Surface water-storage tank, including structural reinforcement and foundation, shall allow for thermal movements resulting from the following maximum change

(range) in ambient and surface temperatures by preventing buckling, opening of joints, overstressing of components, failure of connections, and other detrimental effects. Base engineering calculations on surface temperatures of materials due to both solar heat gain and nighttime-sky heat loss.

1. Temperature Change (Range): Minus 20 deg F to 120 deg F (67 deg C), ambient, material surfaces.

D. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

E. Comply with AWWA D103, "Factory-Coated Bolted Steel Tanks for Water Storage," and with

AWWA M42, "Steel Water-Storage Tanks," for bolted-steel, surface water-storage tanks.

F. Comply with NFPA 22, "Water Tanks for Private Fire Protection," for surface water-storage tanks for fire-suppression water supply.

2.2 BOLTED-STEEL RESERVOIRS

A. Manufacturer:

1. Corgal Water Storage Tanks, Inc., Model 2403-WT-CHR-25.

a. Tank height may not exceed 12’-9”.

2. American Tank Company.

3. Equal approved by COR.

B. Description: Bolted-steel plates, bolts, rods, optional center post, and reinforcing steel; designed and fabricated according to AWWA D100, AWWA M42, and NFPA 22.

1. Capacity: 42,000 gal. Minimum 35000 usable gallons.

2. Shell Roof: Comply with AWWA D103. Use shallow roof slope, approx. 18 inches from height of sidewall to peak of roof.

3. Reservoir Shell Diameter: 19’ 9” or less. NOTE: Mounting slab is a 22 ft x 22 ft square, which will allow for fastening tank to slab and allow for access.

4. Pipe Connection: 8-inch flanged.

5. Overflow Piping: ASTM A 53/A 53M, Grade B, 4-inch Schedule 40, galvanized steel pipe.

6. Roof Hatch: Steel, hinged cover, 24 by 18 inches minimum with 4-inch (100-mm) neck and 2-inch (50-mm) downward overlap with hasp and lock, located over interior ladder and adjacent to exterior ladder.

7. Tank Vent: 3-inch steel pipe with stainless-steel screen, constructed to prevent entrance of rain, insects, birds, and animals.

8. Foundation Slab: by General Contractor.

9. Insulation: In accordance with NFPA 22, 2013 ed., Table 15.1.2.4. Record low temperature is minus 41 deg. F.

10. 16-inch vortex breaker plate.

11. Leak tight membrane liner.

12. Wind/Seismic hold-down Brackets for Category C.

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2.3 PAINT MATERIALS

A. Paint: Comply with AWWA D102.

B. Primer: Tank fabricator's standard epoxy-polyamide paint.

C. Tank Shell Interior Finish Paint: Tank fabricator's standard epoxy-polyamide paint complying with NSF 61 Annex G and compatible with prime coat.

D. Tank Shell Exterior Intermediate Paint: Tank fabricator's standard, two-component epoxy paint compatible with prime and finish paint. Intermediate coat shall have a slight color contrast with finish coat.

E. Tank Shell Exterior Finish Paint: Tank fabricator's standard urethane paint.

1. Color: As selected by Contracting officer from tank manufacturer's paint chart.

2.4 SHOP PAINTING

A. Factory coating according to AWWA D103.

B. Tank Shell Interior Finish Coat: Comply with NSF 61 Annex G.

C. Tank Shell Exterior Finish Coat: Factory coating according to AWWA D103.

2.5 SURFACE WATER-STORAGE TANK APPURTENANCES

A. Water-Level Controls: Automatic controls for maintaining water level in tank, with valves, piping, and audible and visual alarms to indicate the following:

1. High- and low-water levels.

2. Tank overflowing or tank not filling.

B. Tank Temperature: Circulating loop to and from the pump house building, as shown on drawings. Piping shall be insulated and heat traced. Min. 4-inch fiberglass with waterproof jacketing on all exposed piping.

2.6 TANK CIRCULATION PUMP FOR TEMPERATURE MAINTENANCE

A. High efficiency large wet rotor circulator with electronically commutated motor (ECM).

1. 1 HP, 208v – 230v, single phase

2. Set Point Temperature (T) 42 deg. F.

3. Manufacturer: Bell & Gossett.

a. Ecocirc XL-65-130, 1 ½” flanged connection

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PART 3 - EXECUTION

3.1 STEEL, SURFACE WATER-STORAGE TANK INSTALLATION

A. Erect tank shell, accessories, and appurtenances according to AWWA D100 and AWWA M42.

B. Fabricate tank sections and drill or punch bolt holes in the shop. Install bolts during field erection of tank.

C. Install roof hatch near exterior ladder.

D. Install roof manhole near center of roof.

E. Install tank vent at center of roof.

F. Secure tank to mounting slab. Tank manufacturer supplied hold down fasteners, contractor installs approximately 30 hold down fasteners.

3.2 CONNECTIONS

Coordinate piping installations and specialty arrangements with schematics on Drawings and with requirements specified in piping systems. If Drawings are explicit enough, these requirements may be reduced or omitted.

A. Connect tanks to fire pump source piping.

B. Ground equipment according to Section 260526 "Grounding and Bonding for Electrical

Systems."

C. Connect wiring according to Section 260519 "Low-Voltage Electrical Power Conductors and

Cables."

3.3 FIELD PAINTING

A. Overflow Pipe: Paint pipe exterior that is outside tank and structure.

Delete first paragraph below if no exterior ladders or if galvanized surface is required.

B. Exterior Ladders: Paint.

C. Do not paint if ambient temperature is less than 50 deg F (10 deg C) or is expected to drop below 40 deg F (5 deg C) in the next 18 hours. Do not paint if temperature of steel surface is higher than 125 deg F (52 deg C). Do not apply paint if surfaces are wet or damp, if precipitation is expected, or if relative humidity will exceed 85 percent. Do not spray paint when wind velocity exceeds 15 mph (24 km/h). Maintain at least a 24-hour waiting period between coats. Provide adequate ventilation in tank during painting to maintain clear atmosphere and provide explosion-proof flood lighting and spot lighting.

D. Complete daily painting to allow time for paint to dry before condensation is expected.

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3.4 SURFACE WATER-STORAGE TANK APPURTENANCE INSTALLATION

A. Install and adjust water-level control valves, piping, and alarms.

B. Install lightning protection.

C. Install tank heaters according to NFPA 22 as additive alternate.

3.5 FIELD QUALITY CONTROL

A. Testing: Contracting officer will engage a qualified testing agency to perform the following field quality-control testing:

1. Leak Test: Comply with AWWA D103 and NFPA 22. Fill tanks with potable water and test for leaks after installation. Repair leaks and retest until no leaks exist.

a. Water will be provided by Government.

2. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

B. Remove and replace malfunctioning units and retest as specified above.

3.6 CLEANING

A. Clean interior and exterior of surface water-storage tanks.

B. Disinfect surface water-storage tanks according to AWWA C652.

3.7 DEMONSTRATION

A. Engage a factory-authorized service representative to train Government’s maintenance personnel to adjust, operate, and maintain the following. Refer to Section 017900

"Demonstration and Training."

1. Water-level controls.

2. Tank heaters.

END OF SECTION 221219