1、05-11 22 12 16 - 1 SECTION 22 12 16 FACILITY ELEVATED, POTABLE-WATER STORAGE TANKS SPEC WRITER NOTES: 1. Delete between /-/ if not applicable to project. Also delete any other item or paragraph not applicable in section and renumber the paragraphs. 2. Specify cathodic protection for underground wate
2、r piping only if severe corrosion problems exist in the area. Discuss with local Water Authority and the VAMC, and specify cathodic protection, if warranted. PART 1 - GENERAL 1.1 DESCRIPTION A. An elevated steel water storage tank and tower, completed, including risers, piping, drains, materials, la
3、bor, equipment, painting, sterilization and all accessories as required. 1.2 RELATED WORK A. Protection of Materials and Equipment: Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING. B. Lightning Protection: Section 26 41 00, FACILITY LIGHTNING PROTECTION. SPEC WRITE NOTE: Provide hazard lighting o
4、nly, if required by the FAA. C. Hazard Lighting: Division 26. D. /SEISMIC PROTECTION:/ Department of Veterans Affairs Seismic design requirements H-18-8 (2008) / IBC and local building code. / E. COMMISSIONING OF PLUMBING SYSTEMS SECTION 22 08 00: Requirements for commissioning, systems readiness ch
5、ecklist, and training. 1.3 QUALITY ASSURANCE A. Criteria: 1. Manufacturer regularly and presently manufactures the item submitted as one of their principal products. 2. Installer, or supplier of a service, has technical qualifications, experience, trained personnel, and facilities to perform the spe
6、cified work. 3. Submit a list of five completed projects of similar type and references with current position, address, telephone number, and e-mail. B. System Requirements: AWWA D100 for steel tanks plus the following: Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
7、ense from IHS-,-,-05-11 22 12 16 - 2 1. Steel Tower Supporting Elevated Water Tank Design Loads: a. Weight of Tank and Water. b. Wind Load. c. Seismic Load. d. Combined Loads: Design for the worst case: 1) Gravity and wind. 2) Gravity and seismic. e. / Snow Load. / f. Design Code: American Institute
8、 of Steel Construction Specification (AISC) for Structural Steel for Buildings - Allowable Stress Design and Plastic Design. 2. IBC and local building codes. 1.4 SUBMITTALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. All construction drawings to have a PE
9、 Stamp. B. Manufacturers Literature and Data: 1. Piping. 2. Valves. 3. Floor Drain. 4. Steel Tank and Accessories. 5. Alarm System. 6. OSHA approved climbing equipment for maintenance personnel. 7. Tank Heating Equipment. 8. Lightning Protection. 9. Paint. C. Calculations and completely detailed ere
10、ction procedure with and shop drawings. D. Foundation, footings and calculation, designed and stamped by a professional Structural Engineer. 1.5 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the
11、 text by the basic designation only. B. American Institute of Steel Construction (AISC): AISC 325-05 (Steel construction Manual, Thirteenth Edition). C. American Society of mechanical Engineers (ASME): ANSI/ASME A112.6.3-2001 Floor and Trench Drains ANSI/ASME A112.6.3-2001 Cast Iron Pipe Flanges and
12、 Flanged Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 3 Fittings ANSI/ASME B16.1 2005 Gray Iron Pipe Flanges and Flanged Fittings; Classes 25, 125, 250. ASME.ANSI B16.34 - 2009 Valves, flanged, threaded and welded end. D. American
13、 Society of Civil Engineers (ASCE): Minimum Design Loads for Buildings and Other Structures - ASCE/7-05. E. American Society for Testing and Materials (ASTM): A36/A36M-08 Standard Specification for Carbon Structural Steel A53/A53M-07 Standard Specification for Pipe, Steel, Black and Hot-dipped, Zinc
14、-coated, Welded and Seamless A123/A123M-09 Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products A153/A153M-09 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware A234/A234M-07 Piping Fittings of Wrought Carbon Steel and Alloy Steel For Mod
15、erate and High Temperature Service F. American Water Works Associations (AWWA): C110/A21.10-03 . Ductile-Iron and Gray-Iron Fittings for Water C115/A21.15-05 . Flanged Ductile-Iron Pipe with Ductile-Iron or Gray-Iron Threaded Flanges C151/A21.51-09 . Ductile-Iron Pipe, Centrifugally Cast, for Water
16、or Other Liquids B300-10 Standards for Hypochlorites B301-10 10 . Standards for Liquid Chlorine C652-02 Disinfection of Water Storage Facilities D100-05 Welded Steel Tanks for Water Storage ANSI/AWWWA D102-06 . Coating Steel Water-Storage Tanks G. International Building Code: 2009 H. National Fire P
17、rotection Association (NFPA): NFPA 22-08 Water Tanks for Private Fire Protection NFPA 25-08 Standard for the Inspection, Testing and Maintenance of Water-Based Fire Protection Systems I. Department of Veterans Affairs (Handbook): H-18-8 (2008) Seismic Design Requirements Provided by IHSNot for Resal
18、eNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 4 J. NSF INTERNATIONAL (NSF) NSF/ANSI 61 (2010) Drinking Water System Components -Health Effects PART 2 - PRODUCTS 2.1 TANK SPEC WRITER NOTE: Select the type of tank required and provide a detailed drawing showing
19、 the tank height, capacity, high and low water levels, VAMC logo and other pertinent data for a complete installation. Due to its esthetics the pedestal tank is preferred. A. Shall be in accordance with NFPA 22, AWWA D-100-05 and ASTM A36. B. /The tank shall be of the double ellipsoidal type and sup
20、ported by columns / Double ellipsoidal / Pedestal Sphere or Spheroid /. C. The tank shall be constructed of one quarter inch minimum thick steel plus .01” for corrosion allowance. Tank shall be welded throughout. D. The wind loading shall be_kg/m2 (_lb/ft2) on the vertical surfaces, _kg/m2 (_lb/ft2)
21、 on the projected areas of cylindrical surfaces and _kg/m2 (_lb/ft2) on projected area of conical and double-curved plate surfaces. The entire structure shall withstand a _km/hr (_mph) winds. E. Design the tank to withstand / earthquake zone _ as defined by the Veterans Affairs Handbook H-18-8 / Int
22、ernational Building Code Requirement /. F. The balcony and ladder loading shall be as specified in AWWA D100, furnish OSHA approved climbing equipment. 2.2 FOUNDATION SPEC WRITER NOTE: Provide at least one soil boring in the area of the proposed tank for the contractor reference. A. The elevated wat
23、er tower contractor shall be responsible for the soil borings, design and installation of the foundation and footings. B. The soil borings shall be performed by an independent and established soils engineering firm. 2.3 ACCESSORIES A. Comply with / NFPA No. 22 / AWWA D100-05 /. Main riser and overfl
24、ow shall be schedule 40 steel, ASTM A53 with schedule 40, ASTM A234, butt welded fittings. B. The main tank riser shall be _mm (_inch). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 5 C. Overflow: Provide a _ mm _ (inch) steel pipe
25、 extended to grade with an overflow visible before spilling into a storm sewer inlet. The overflow shall be provided with an insect screen and splash block. SPEC WRITER NOTE: Use paragraph D, E and allow for unobstructed maintenance and replacement. Pipes, valves, and fittings shall be supported on
26、concrete blocks where necessary. The valve chamber shall be constructed to provide not less than _ mm (_feet) of cover over the pipes. The valves and fittings shall extend from the /standpipe/reservoir/riser pipe/ connection to a point one length of pipe outside the valve chamber walls on the main o
27、r feed line to the /elevated tank/standpipe/. The drain line shall be carried to an outlet as indicated on the drawings. The access manhole shall be not less than 760 mm (30 inches) in diameter. 2.7 FLOOR DRAIN ASME A112.6.3-2001, Cast iron with light duty grate. /A. Bottom outlet/. /B. Side outlet/
28、. 2.8 HIGH AND LOW WATER LEVEL ALARM SYSTEMS A. Provide high and low level devices for alarm monitoring and an intermediate device for tank water level status. 1. All three water levels shall be indicated by their respective pilot lights; green for high, amber for intermediate and red for low water
29、levels, and a buzzer for low and high water levels. 2. Buzzer and the respective pilot lights at high and low water levels shall be energized while the high or low water level pilot device is actuated. 3. Depressing a silencing button shall silence the buzzer indicating the water level and shall rem
30、ain in OFF condition. The pilot light shall remain energized. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 8 4. Resetting the pilot light shall de-energize the pilot light and release the buzzer from its sealed-off condition. 5. P
31、rovide alarming contacts to a DDC (Direct Digital Controls) remotely to the ECC (Engineering Control Center) operator. 2.9 TANK HEATING SPEC WRITE NOTE: Provide heating for tanks located where the lowest mean temperature for one day is less than -15 degrees C (5 degrees F). NFPA 22 defines many ways
32、 for heating the tank water including steam coils, hot water coils, solar panels, direct discharge of steam, etc. A. Provide tank heating to protect the tank from freezing in accordance with NFPA 22 Chapter 16 Water Tank Heating. Maintain water temperature at or above 42F (5.6C) at all times. /B. El
33、ectric Heat: Nickel chromium, electric-resistance elements, helix wound, factory-wired with time delay for element staging, and overcurrent and overheat protective devices. / /C. Hot Water Pipe: Copper tubing./ /D. Steam Water Heater: 1. Shall consist of cast-iron or steel shell where water circulat
34、es around steam tubes or coils of brass or copper. 2. Steam water heater shall be connected to a reliable steam supply with a pressure not less than 0.7 bar (10 psig) and not over 3.4 bar (50 psig). / PART 3 - EXECUTION 3.1 INSTALLATION A. Install tank and tower in accordance with NFPA 22. B. Instal
35、l safety ladders in accordance with NFPA 22 and OSHA requirements. 3.2 TANK INSPECTION A. Comply with AWWA and NFPA 25 requirements. 3.3 LEAKAGE TEST: A. Comply with AWWA, NFPA 22 and NFPA 25 requirements. 3.4 LIGHTNING PROTECTION A. Comply with NFPA 22. SPEC WRITER NOTE: Select either painting or m
36、etallic coatings. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 9 /3.5 FIELD PAINTING A. After construction, all weld seams, unprimed margins, field bolts, lugs and any area where the factory primer has been damaged shall be blast
37、cleaned and re-primed with the same factory primer. Apply paint in accordance with NFPA 22 and AWWA D102. The exterior paint color and the VAMC logo shall be as directed by the VAMC /. /3.6 METALLIC COATINGS A. Tower members, protection shield, ladders, ladder safety cages, rigging lugs, overflow pi
38、pe and riser shall be zinc-coated (galvanized) by the hot-dip method, ASTM A123. Bolts and similar fasteners shall be zinc-coated by the hot-dip method, ASTM A153. Hot-dip galvanized surfaces abraded or burned off by welding operations shall be repaired with zinc repair compound in stick or powder f
39、orm, applied in accordance with the manufacturers printed instructions. B. All interior surfaces and all interior components of the tank shall be zinc metallized, and all exterior surfaces of the tank and any additional surfaces not previously designated shall be aluminum metallized after constructi
40、on and testing. Application of metallized coatings shall be as specified in Section 09 06 00, SCHEDULE FOR FINISHES. / /C. Option: In lieu of hot-dip galvanizing members, all such members may be aluminum metallized as specified in Section 09 06 00, SCHEDULE FOR FINISHES./ 3.7 FLUSHING A. After tests
41、 and / painting / metallizing /, flush tank and connecting pipelines. 3.8 DISINFECTION/ STERILIZATION A. After flushing, thoroughly disinfect and sterilize the tank and connecting piping with a chlorine and hypochlorite solution as required by AWWA C652. Following a contact period of 24 hours, flush
42、 the system with clean water until the residual chlorine content is not greater than that of the water supply. All valves in water line being disinfected shall be opened and closed several times during the 24 hour period. Hypochlorite material shall comply with Fed Spec O-C-114 or Fed Spec O-S-602,
43、grade B. B. Hypochlorite material shall comply with AWWA B300-10. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-05-11 22 12 16 - 10 3.9 COMMISSIONING A. Provide commissioning documentation in accordance with the requirements of Section 22 08 00 COM
44、MISSIONING OF PLUMBING SYSTEMS for all inspection, startup, and contractor testing required above and required by the System Readiness Checklist provided by the Commissioning Agent. B. Components provided under this section of the specification will be tested as part of a larger system. Refer to Section 22 08 00 COMMISSIONING OF PLUMBING SYSTEMS and related sections for contractor responsibilities for system commissioning. - - - E N D - - - Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
