SECTION FACILITY F.R.P. BOLTED PANEL TYPE, POTABLE-WATER STORAGE NON-PRESSURE TANKS

Transcription

1 SECTION FACILITY F.R.P. BOLTED PANEL TYPE, POTABLE-WATER STORAGE NON-PRESSURE 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. PART 1 - GENERAL 1.1 DESCRIPTION A. A F.R.P. Bolted Panel type water storage tank, completed, including Steel Footing, Concrete slabs, Flanges, piping, drains, materials, labor, equipment, and all accessories as required. 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 specified work. 3. Submit a list of five completed projects of similar type and references with current position, address, telephone number, and e- mail. 4. Product is certified to the sanitary requirements of NSF Product is in compliance to ASCE 7 05: Minimum Design Loads for Buildings and Other Structures, AWWA D Manufacturer fabricates in ISO 9001:2008 facilities. B. System Requirements: AWWA D for F.R.P. tanks plus the following: 1. ASCE 7 05: Minimum Design Loads for Buildings and Other Structures: a. Weight of Tank and Water. b. Wind Load. c. Seismic Calculation. d. Combined Loads: Design for the worst case: 1) Snow and wind. 2) Snow, Wind and seismic. e. Snow Load. f. Design Code: American Society of Civil Engineers (ASCE) Buildings and Other Structures - Allowable Minimum Design Load. 2. IBC and local building codes

2 1.4 SUBMITTALS A. Submit in accordance with Section , SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Manufacturers' Literature and Data: 1. Materials. 2. Dimensions. 3. Fabrication. 4. Bolts & Nuts. 5. Sealing Materials. 6. Insulation. 7. Reinforcements and Supports. 8. Roof Manhole Cover. 9. Air Vent. 10. Ladders. 11. Steel Footing. 12. Static electricity eliminator. 13. Flanges C. Detailed shop drawings. 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 text by the basic designation only. B. American Society of Civil Engineers (ASCE): Minimum Design Loads for Buildings and Other Structures - ASCE/7-05. C. International Organization for Standardization (ISO): ISO Fiber-reinforced plastics -- Molding compounds and prepregs -- Determination of mass per unit area ISO Textile-glass-reinforced plastics -- Prepregs, molding compounds and laminates -- Determination of the textile-glass and mineralfiller content -- Calcinations methods ISO Fiber-reinforced plastics -- Thermosetting molding compounds and prepregs -- Determination of cure characteristics ISO Plastics -- Thermosetting molding materials -- Determination of shrinkage

3 ISO-1183A...Plastics -- Methods for determining the density of non-cellular plastics -- Part 1: Immersion method, liquid pyknometer method and titration method A: Immersion method, for solid plastics (except for powders) in void-free form. ISO Fiber-reinforced plastic composites -- Determination of flexural properties ISO Plastics -- Determination of Charpy impact properties -- Part 1: Non-instrumented impact test ISO Plastics -- Determination of tensile properties -- Part 4: Test conditions for isotropic and orthotropic fiber-reinforced plastic composites ISO-9001: Quality management systems -- Requirements D. American Society for Testing and Materials (ASTM): D Standard Test Method for Tensile Properties of Plastics D Standard Test Method for Compressive Properties of Rigid Plastics D Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials D Standard Test Method for Shear Strength of Plastics by Punch Tool D Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics D Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement D Standard Test Method for Water Absorption of Plastics D Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between -30 C and 30 C With a Vitreous Silica Dilatometer D Standard Test Method for Ignition Loss of Cured Reinforced Resins

4 D Standard Test Method for Indentation Hardness of Rigid Plastics by Means of a Barcol Impressor ASTM E Standard Test Method for Solar Absorptance, Reflectance, and Transmittance of Materials Using Integrating Spheres ASTM E Standard Test Method for Surface Burning Characteristics of Building Materials A123/A123M-09...Standard Specification for Zinc (Hot-Dip Galvanized) Coatings on Iron and Steel Products A Standard Specification for Carbon Steel Bolts and Studs, PSI Tensile Strength A Standard Specification for Structural Bolts, Steel, Heat Treated, 120/105 ksi Minimum Tensile Strength A Standard Specification for Structural Bolts, Alloy Steel, Heat Treated, 150 ksi Minimum Tensile Strength F Standard Specifications for Stainless Steel Bolts, Hex Cap Screws, and Studs A194 / A194M Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure or High Temperature Service, or Both A563-07a...Standard Specification for Carbon and Alloy Steel Nuts E. Deutsches Institut für Normung (DIN) [the German Institute for Standardization] DIN Standard Specifications for Washers; medium type, primarily for hexagon bolts (DIN EN ISO 7089) DIN Standard Specifications for M1.6 to M52 Hexagon Cap Screws Fully Threaded (DIN EN ISO 4017) DIN Standard Specification for Hexagon nuts with metric coarse and fine pitch thread (DIN EN ISO 4032)

5 F. American Water Works Associations (AWWA): AWWA D Standard for Bolted Aboveground Thermosetting Fiberglass-Reinforced Plastic Panel-Type Tanks for Water Storage G. International Building Code: 2009 (IBC) H. 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 the tank height, capacity, high and low water levels and other pertinent data for a complete installation. A. Tank design FRP Panel Type Water Tank shall be in compliance to ASCE 7 05: Minimum Design Loads for Buildings and Other Structures, AWWA D and fabricated in ISO 9001:2008 facilities. B. The water tank must be certified to the sanitary requirements of NSF 61. C. Tanks shall be constructed in metric modular panels in configurations of 2m x 1m / 1m x 1m / 1.5m x 1m / 2m x 0.5m / 1.5m x 0.5m / 1m x 0.5m / 0.5m x 0.5m. D. The wind loading shall be 167kg/m 2 (34.2 lb/ft 2 ) on the vertical surfaces. The entire structure shall withstand a 216 km/hr (134mph) winds. // A detailed calculation note shall be provided to prove tank resistance. // SPEC WRITER NOTE: In case the wind load is superior to what mentioned above, wind loading shall be mentioned. E. Design the tank to withstand earthquake zone 2A as defined by the ASCE- 7/05 and the International Building Code Requirement Moreover, a Calculation note shall be provided to prove tank resistant to defined earthquake zone

6 SPEC WRITER NOTE: If your earthquake zone is higher than the one mentioned in 2.1-E the new zone shall be determined and a new tank design with calculation note must be submitted accordingly. 2.2 FOUNDATION A. The elevated concrete foundation shall be made with Reinforced Concrete Beams (RCB) of 0.6m (2ft) elevation, 2m (6.56ft) distance (Centre to Centre) and 0.3m (1ft) width. B. The elevated RCB shall be performed by an independent and established civil work contracting firm. SPEC WRITER NOTE: Provide at least one soil boring in the area of the proposed tank for the contractor reference. 2.3 MATERIALS A. Materials for panels production shall be Isophtalic unsaturated polyester resin to conform to ASTM specifications: D638, D695, D790 and D792., and the glassfibre used shall be non-alkali type conforming to ISO B. Manufacturing process of panel shall be a Hot Press Molding System at 300 F (150 C) temperature and 3000 psi (20.5 MPA) with curing characteristics conforming to ISO and shrinkage properties to ISO The Sheet Molding Compound (S.M.C.) Raw Material shall be conforming to ISO and from an approved NSF 61 supplier. C. SMC forming panels shall be externally reinforced with F/G roving mesh of density not less than 87 oz/ft2 (230 g/m2) before the hot pressing process. D. Panels shall be of Fire class 2 or B or better with a flame spread index of 70 and a smoke development index of 450 conforming to ASTM E84 12 Standard. F. Panels and covers shall be of Grey color in accordance to Munsell's value N 7.0 to prevent light transmission, conforming to ASTM E903-96,

7 in order to avoid algae growth inside the tank. (Value of light transmission shall not exceed 0.00%). 2.4 DIMENSIONS A. Tolerance on each panel shall be within +/-0.03% of the nominal dimensions. B. Tolerance with regard to panels and flange angle shall be within +/ FABRICATION A. G.R.P. Panels shall be externally flanged at 90º on four sides. B. Thickness of flange for roof panels shall not be less than 1/4 (6mm) with a landed width of not less than 2¼ (57mm), other panels' flange shall not be less than 13/32 (10mm) and the landed width of all flanges shall not be less than 3 (75mm). 2.6 ACCESSORIES A. Bolts & Nuts 1. Bolts, nuts and washers for external fixing shall be of Hot Dipped Galvanized steel grade 8.8, and for internal fixing of Stainless Steel A4 316 and shall conform to the requirements of ASTM A307, ASTM A325, ASTM A490, ASTM F593 or DIN 933 (for bolts) and ASTM A194, ASTM A563 or DIN 934 (for nuts). 2. Bolt sets for connecting the flanges of inlet, outlet, overflow and drainage to water tanks shall be of food grade Rubber Capped type. 3. Diameter of main fixing bolts and nuts shall be not less than ½ (12mm) & at a rate of 8 bolt sets per linear meter. B. Sealing Materials 1. Sealant materials used for joints shall be chemically stable, non toxic, flexible, and resistant to ultraviolet rays and must be tested for non toxicity in accordance to NSF

8 2. Material for the main solid sealant shall be made of S.E.B.S. (Stylene Ethylene Butyrene Styrene) i.e. Solid synthetic Rubber whereas material for the roof sealant shall be made of EPDM Rubber. 3. The main sealant shall be ribbed in not less than 4 locations. These ribs shall be continuous along the length of the sealant without any breaking. Such main sealant shall remain flexible and resistant to ultra violet rays. 4. The main sealant shall be certified to NSF 61 //Test report to be provided// : Toxicology reviewed for the effect on taste, odor, color and turbidity Toxic metals Cytotoxicity Microbiological growth such tests shall be performed by an accredited laboratory. C. Insulation Optional insulation could be added in the form of 1 (25mm) or 2 (50mm) Rigid Polyurethane foam sandwiched between the FRP panel and the ASA external cover having a minimum thickness of 0.08 (2mm) for side panels and 0.04 (1mm) for Roof and Bottom panels. Heat Transfer Coefficient should be Btu (IT)/ft 2 /hr/ F or (1Kcal/m 2 /hr/ C). 1. In warm climates, Roof and Side panels shall be insulated. 2. In cold climates, Bottom and Side panels shall be insulated. 3. For thermal storage tanks (hot or cold), all sides (roof, bottom and sides panels) shall be insulated. D. Reinforcements and Supports of Water Tank 1. Water tanks shall be strengthened externally with hot dipped galvanized steel reinforcement conforming to ASTM A Internal reinforcements for FRP Panel tanks, if required by manufacturer, shall be of Stainless Steel grade A

9 3. Support poles of ceiling panels shall be upvc pipes or FRP pipe according to tank height and proper structural design. 4. Brackets securing the roof tank covers shall be made of food grade high density polyurethane material. E. Roof Manhole Cover 1. The roof manhole panel shall have a 30 (760mm) diameter clear opening and access door fixed with Stainless Steel Hinges and lock device. 2. The access door shall be designed to open at 135º Radius and to be detachable if required. 3. The access door shall be hermetically closed and light, dust and insect proof. F. Air Vent Air vents shall be made of 4 Dia (100mm) with net of mesh No. 22 and shall be light, dust and insect proof. G. Ladders Ladders and safety devices shall be provided and location of ladders shall be as shown on the drawings. In addition, safety cage, rest platforms, roof ladder handrails, and other safety devices shall be provided as required by federal or local laws or regulations. 1. Tanks above 3.3ft (1m) high shall have one external and one internal ladder fitted to every manhole access. 2. The external ladder shall be made of hot dipped galvanized steel conforming to ASTM A The internal ladder shall be made of FRP food grade material conforming to NSF

10 H. Steel Footing 1. Water tanks higher than 3.3ft (1m) shall be mounted firmly onto a steel footing. For 4.9 & 6.6ft (1.5 & 2m) high tanks, primary beams shall be of size not less than W4x13 (H-Beam 100x100x8mm) and for tanks higher than 2m primary beams shall be I Beams of minimum size W8x13 (I-Beam 200x100x7x5mm) 2. Maximum deflection permissible shall not exceed 3/16 (5mm). 3. The Steel footing shall be hot dipped galvanized steel conforming to ASTM A123. I. Static Electricity Eliminator SPEC WRITER NOTE: Use point I only for tanks designed to be reinforced internally. External reinforcement design does not need such a device. Tank design with internal reinforcement shall be provided with a removable static electricity device to ground the Static Electrical current that might occur to the Stainless steel rods inside the tank. 2.5 FLANGES SPEC WRITER NOTE: Coordinate with the mechanical design engineer and modify the following paragraph as required to suit the required sizes and types for Inlet, Outlet, Overflow and Drain. 1. Flanges shall be made of UPVC Full Face high pressure bolted type with EPDM Rubber Gasket ribbed in at least two locations. 2. Flanges shall be fixed to the tank panels with hot dipped Galvanized, food grade and Ultra violet resistant type Rubber capped Bolts. 3. Overflow opening shall be at least twice the size of Inlet and shall flow freely to the ground in order to avoid bottlenecking

11 PART 3 - EXECUTION 3.1 INSTALLATION A. Tanks shall be installed in accordance with the manufacturer s requirements. B. A detailed installation manual and method statement shall be provided by the manufacturer and tank execution shall be done accordingly. 3.2 TANK INSPECTION AND COMMISSIONING A. Comply with AWWA D requirements. //..AWWA D Section 10.6: Tanks should be inspected and maintained as prescribed in FTPI taking notable exceptions into consideration such as manufacturing method being compression molding. In addition to inspection procedures described, the tightness/torque of the over roof tie-rods should also be checked annually for slackness and adjusted if required // 3.3 LEAKAGE TEST: A. Comply with AWWA D requirements. //..AWWA D Section 10.2: Once assembled the tank should be slowly filled with water to just beyond the first horizontal joint line which is normally at 3.3 ft (1 m). Walk around and inspect all joints and penetrations for leakage. Continue to fill tank slowly and repeat the process of a walk around visual inspection at each horizontal joint level until the tank is full. Leave the tank full for a period of at least 24 hours and do a final leakage/general conditions walk around inspection // E N D