SECTION FIRE HYDRANTS

Transcription

1 SECTION PART 1. GENERAL 1.1 SUMMARY: A. Work consists of furnishing and installing new fire hydrants, (boot with ductile iron retainer gland, standpipe and hydrant complete) plus constructing dry wells complete, at locations shown on the Contract Drawings and/or as directed by DC Water. B. Any work that is excavated or disturbed beyond the construction pay limits shall be the Contractor s sole responsibility to replace in kind at no additional cost to DC Water. 1.2 RELATED DOCUMENTS: A. Drawings, Technical Specification Sections, General and Supplementary Conditions of the Contract and other Division 00 and Division 01 Specification Sections, apply to this Section. B. Specifications throughout all Divisions of the Project Manual are directly pertinent to this Section, and this Section is directly pertinent to them. 1.3 REFERENCED SECTIONS: Specified Sections elsewhere may include but are not limited to: A. Section : Submittals. B. Section : Geotextiles. C. Section : Aggregate Materials. D. Section : Water Utility Distribution Piping Ductile Iron Pipe. E. Section : Disinfecting Water Mains. 1.4 REFERENCED CODES AND STANDARDS A. American Water Works Association (AWWA): 1. AWWA C502: Dry-Barrel Fire Hydrants. 2. AWWA C600: Installation of Ductile Iron Water Mains and Their Appurtenances. 3. AWWA M17: Fire Hydrants: Installation, Field Testing, and Maintenance. 1.5 QUALITY ASSURANCE: A. Compliance Requirements: 1.6 SUBMITTALS: 1. Hydrants shall be UL listed and FM approved. 2. Hydrants shall comply with AWWA C All fire hydrants furnished shall be factory tested to a pressure of 300 psig. A. Requirements for Submittals shall be in accordance with Section B. Submit Certifications for each of the materials specified herein, which will be used on the project, with the manufacturer s Certificate of Compliance stating Fire Hydrants materials meet or exceed the specified requirements. C. Submit the Product Data Sheets for each product used SDWM SPECIFICATIONS

2 PART 2. D. Submit the Test Results for fire hydrants. E. Submit Color Cards for fire hydrant color selection. PRODUCTS 2.1 MATERIALS: A. Hydrants: 1. Fire hydrants shall be compression type, hand operated, for fire protection service under operating pressure of 200 psig and manufactured per AWWA C Hydrant Models: Mueller Super Centurion Model No. A-423, made by Mueller Company, Decatur, Illinois, Kennedy Guardian - Model No. K-81-D, made by Kennedy Valve, Elmira, New York. No other hydrant models or or-equals shall be used. 3. AWWA C502 is modified or supplemented as follows: Size - 5-1/4 inch minimum, nominal I.D. main valve opening. Bury Length - 4-1/2 feet or as directed by DC Water. Barrel Sections - Hydrants shall be "traffic" type fire hydrants complete with breakable safety flange and 8 bolts and nuts, located near the ground line and designed to break on vehicle impact. Design shall allow top section to rotate a full 360. Hydrant Top - Hydrants shall be permanently lubricated and require one man maintenance, no special tools. Outlet Nozzles - Two 2-1/2 inch nominal I.D. hose nozzles; one 4-1/2 inch nominal I.D. pumper connection. 1) Threads for 2-1/2-inch nozzles per National Fire Standard Hose Coupling Screw Threads; threads for 4-1/2 inch pumper connection will be per National Standard Threaded Connections. Operating Stem and Mechanism - Operating and outlet nozzle cap nuts shall be pentagonal in shape. 1) The pentagon shall measure 1-51/64 inch from point to flat at the base of the nut and 1-47/64 inch at the top. The height of the nut shall not be less than 1-inch. 2) Direction of operating nut rotation to open: a) Left (counterclockwise). O-Ring Seals - O-ring seals shall be used in lieu of stuffing box. Gaskets - Material shall be rubber composition; asbestos prohibited. Hydrant Inlet - Boot side inlet shall be 6-inch diameter with retainer gland mechanical joint per Section titled, Water Utility Distribution Piping Ductile Iron Pipe. Cap chains - hose cap chains and steamer cap chains are required with all hydrants; chain links (zinc plated steel) shall be fabricated not less than 1/8-inch in diameter and with S hook device (zinc plated steel) attached SDWM SPECIFICATIONS

3 Coatings - Above grade line, inside and outside of hydrant shall be coated per one of the following schemes: 1) System 1: a) Primer One (1) coat PPG Amercoat 370, product code AT370, or approved equal, 4-6 mils dry film thickness. b) Finish Coat One (1) coat Sherwin-Williams Polane SP, product code F63RXG9621, or approved equal, mils dry film thickness. 2) System 2: a) Top Coat One (1) coat Ken-Guard TGIC Polyester Coating, fusion bonded, or approved equal, 4-6 mils dry film thickness. Coatings Lower Barrel and Shoe, inside and outside, shall be painted per one of the following schemes, or equal: 1) System 1: a) Primer One (1) coat PPG Amercoat 370, product code AT370, 4-6 mils dry film thickness. 2) System 2: a) Primer for Barrel One (1) coat Asphalt Emulsion for Ductile Iron Pipe and Fittings, or equal, 4-6 mils dry film thickness. b) Top Coat for Shoe One (1) coat IVC Industrial Coatings Inc. Red Oxide Epoxy, fusion bonded, or equal, 8-10 mils dry film. Hydrant colors will be selected by DC Water with input from the local fire department and/or DC Water maintenance group. Coatings shall be NSF 61 approved and AWWA C550 compliant. Operating nut The operating nut shall be drilled and tapped with a 27/64 drill hole, 1-1/8 deep with a ½ -13 thread tap to the bottom of the drill hole. The operating nut shall be custodian ready for Hydra-Shield Custodian Lock Assembly as manufactured by Hydra-Shield or approved equal. 4. Bolts and nuts shall be a high strength, low alloy; corrosion resistant steel, known as Cor-Ten, Usalloy, Durabolt or stainless steel 304, or approved equal. 5. Fire hydrants shall be furnished with a breakaway traffic flange of the type which allows both barrel and stem to break clean upon impact from any angle. Traffic flange design must be such that repair and replacement can be accomplished above ground. 6. Locking system for fire hydrants in high security areas shall be Custodian Hydrant Lock Manufactured by Hydra-Shield Manufacturing, Inc. or equal and be compatible with all other fire hydrant requirements specified in this Section. B. Gravel for Dry Well: 1. Washed gravel used in construction of the Dry Well shall comply with Section titled Aggregate Materials. C. Filter Fabric: 1. Filter fabric shall be for subsurface drainage as specified in Section titled, Geotextiles SDWM SPECIFICATIONS

4 PART 3. EXECUTION 3.1 CONSTRUCTION REQUIREMENTS: A. Costs for fire hydrant and dry well material, excavation, installation and backfill shall be included in this Section. Costs for fire hydrant connection pipe excavation and backfill shall be included as part of trench excavation. B. All related work on hydrant water line including tests and disinfection shall be pertinent to provisions of Section titled Disinfecting Water Mains. C. Hydrants shall be set plumb with 4-1/2 inch nozzle normal to the curb line. 1. When a hydrant is delivered with the nozzle facing in the incorrect direction, the hydrant shall be rotated to the correct orientation prior to placing the hydrant into service. 2. When barrel of hydrant passes through concrete slab, place 1/2-inch thick piece of standard sidewalk expansion joint material around section of barrel passing through concrete. 3. Do not cover drain ports when installing concrete thrust blocks if thrust blocks are required by the Contract Documents. D. Joint and joint restraint between boot and the connection pipe to the main shall be per Section titled Water Utility Distribution Piping Ductile Iron Pipe. E. Filter fabric shall be placed in the excavated dry wells' interior bottom, interior side walls and placed on the top of the excavation and secured around the hydrant's fittings before completing backfill. F. Locking system for fire hydrants in high security areas. G. Fire Hydrants in High Security Areas: 1. Install custodian security locking system on fire hydrants located in high security areas. 2. Fire Hydrant shall be fully operational with the use of a DC Water hydrant operating wrench after removing the custodian security lock. H. Restoration: 1. Any items disturbed during construction, including shrubs and lawns, shall be replaced in kind by the Contractor upon completion of work. Grassed areas shall be restored using sod. 2. Restoration shall be considered incidental to the Work and payment for restoration shall be included under the bid item of which it is a part of in the SOPs. 3.2 FIELD QUALITY CONTROL: A. Each assembled hydrant shall be operated through a full open-close cycle when not under pressure. The torque required for performing this operation shall not exceed 20 lbf-ft. B. Record fire hydrant data on the As-Built Drawings. C. Perform field inspection and testing of the fire hydrant and piping in accordance with: 1. Section : Water Utility Distribution Piping Ductile Iron Pipe. 2. AWWA C600: Installation of Ductile Iron Water Mains and Their Appurtenances. 3. AWWA M17: Fire Hydrants: Installation, Field Testing, and Maintenance SDWM SPECIFICATIONS

5 PART 4. MEASUREMENT AND PAYMENT 4.1 : A. Measurement: 1. Work for Fire Hydrants will be measured per each for payment B. Payment: 1. Payment for the installation of Fire Hydrants will be made at the Contract unit price per each as stated in the SOPs, complete in place, which price and payment shall include but not be limited to trench & dry well excavation, backfill and compaction, washed gravel, filter fabric, concrete collar, traffic maintenance and protection, minor complications and/or delays, temporary pavement restoration, and all labor, materials, tools, equipment and incidentals necessary to complete the work as specified within the Contract. 4.2 IN HIGH SECURITY AREA: A. Measurement: 1. Work for Fire Hydrants in High Security Area will be measured per each for payment B. Payment: 1. Payment for the installation of Fire Hydrants in High Security Area will be made at the Contract unit price per each as stated in the SOPs, complete in place, which price and payment shall include but not be limited to trench & dry well excavation, backfill and compaction, washed gravel, filter fabric, concrete collar, locking system, traffic maintenance and protection, minor complications and/or delays, temporary pavement restoration, and all labor, materials, tools, equipment and incidentals necessary to complete the work as specified within the Contract. ~ END OF SECTION ~ 2017 SDWM SPECIFICATIONS

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7 SECTION REMOVE AND HYDRANT CONTROL VALVES PART 1. GENERAL 1.1 SUMMARY: A. Work consists of removing fire hydrants and hydrant control valves shown on the Contract Drawings and/or as directed by DC Water. 1.2 RELATED DOCUMENTS: A. Drawings, Technical Specification Sections, General and Supplementary Conditions of the Contract and other Division 00 and Division 01 Specification Sections, apply to this Section. B. Specifications throughout all Divisions of the Project Manual are directly pertinent to this Section, and this Section is directly pertinent to them. 1.3 REFERENCED SECTIONS: Specified elsewhere may include but are not limited to: PART 2. A. Section : Trench Excavation and Backfill. B. Section : Abandonment of Underground Utilities. PRODUCTS (NOT USED) PART 3. EXECUTION 3.1 PREPARATORY WORK: A. Shut off water main. B. All valves will be operated by DC Water. 3.2 REMOVE FIRE HYDRANT AND HYDRANT CONTROL VALVE: A. Excavation and backfill shall comply with Section titled, Trench Excavation and Backfill. B. Excavate to uncover fire hydrant and hydrant control valve. C. Remove fire hydrant and hydrant control valve, cutting pipe or breaking joints as required. D. The components of the existing fire hydrant assemblies shall be carefully removed. Damage to the fire hydrant, hydrant control valve, valve box or barrel impairing re-use shall be determined by DC Water. Damaged components shall be replaced by the Contractor using factory-supplied parts from the same manufacturer and shall be at no additional cost to DC Water. E. DC Water may inspect the fire hydrants and hydrant control valves to determine the usefulness of the removed fire hydrant assembly components. If DC Water determines they are reusable, the fire hydrants and hydrant control valves shall be turned over to DC Water at one of the maintenance shops. If DC Water determines that they are not reusable, the Contractor shall remove them from the site and dispose of the material at a licensed disposal facility. F. Plug or cap abandoned water pipe at location shown on drawings. If no location is shown the abandoned pipe shall be removed and plugged at the Tee. Install thrust restraint. REMOVE EXISTING AND HYDRANT CONTROL VALVES 2017 SDWM SPECIFICATIONS

8 G. Tees with lead joints shall be replaced as required per Section titled, Abandonment of Underground Utilities. H. Backfill excavation and restore area. 3.3 RESTORATION: PART 4. A. Any items disturbed during construction, including shrubs and lawns, shall be replaced in kind by the Contractor upon completion of work. Grassed areas shall be restored using sod. B. Restoration shall be considered incidental to the Work and payment for restoration shall be included under the bid item of which it is a part of in the SOPs. MEASUREMENT AND PAYMENT 4.1 REMOVE AND HYDRANT CONTROL VALVES: A. Measurement: 1. Work for Remove Fire Hydrants and Hydrant Control Valves will be measured per each for payment. B. Payment: 1. Payment for Remove Fire Hydrants and Hydrant Control Valves will be made at the Contract unit price per each as stated in the SOPs, which price and payment shall include but not be limited to traffic maintenance and protection, minor complications and/or delays, excavation, backfill and compaction beyond trench excavation pay limits, temporary pavement restoration and all labor, materials, tools, equipment and incidentals necessary to complete the work as specified within the Contract. ~ END OF SECTION ~ REMOVE EXISTING AND HYDRANT CONTROL VALVES 2017 SDWM SPECIFICATIONS